Communication control method, mobile communication system and mobile terminal

FIELD: radio engineering, communication.

SUBSTANCE: method includes the following steps, performed at a base station (eNB): performing channel encoding of information bits (ST 802), performing a process of matching the rate of encoded bits after interleaving (ST 804), and transmitting the transmitted data corresponding to the length of the encoded bits after rate matching to a mobile terminal (UE) (ST 806); and the following steps, performed in a mobile terminal (UE): receiving transmitted data (ST 807), performing channel decoding of the received data (ST 810), and discarding part of the received data according to the soft buffer memory size of the mobile terminal (UE) and storage thereof in the soft buffer memory (ST 812 and ST 813).

EFFECT: reduced deterioration of transmission characteristics when transmitting data even when there is insufficient soft buffer memory in a mobile terminal to control retransmission.

17 cl, 14 dwg

 

The technical field to which the invention relates

Present group of inventions relates to a method for communication control, mobile communication system and mobile terminal. More specifically, the present group of inventions relates to a method for communication control, mobile communication system and mobile terminal designed to reduce deterioration of transmission characteristics when transmitting data.

The level of technology

In a UMTS network (Universal Mobile Telecommunications System, universal mobile telecommunications system) in order to improve spectral efficiency and increase data transmission speeds system features based on W-CDMA (Wideband Code Division Multiple Access, wideband multiple access code division) maximize by applying the HSDPA (High Speed Downlink Packet Access, high-speed downward packet access) and HSUPA (High Speed Uplink Packet Access, high-speed upward packet access). For this UMTS network in order to further improve the high data rates, providing low delay, etc., examines the standard long-term development (LTE, long term evolution) (e.g., see non-patent document 1).

In the mobile communication system of the third generation it is possible to achieve the transfer rate of a maximum of about 2 Mbit/s in downlink with fixed bandwidth of about 2 MHz. Meanwhile, in the system with�EME LTE it is possible to achieve a transmission rate of about maximum 300 Mbps in downlink and 75 Mbps in uplink by using a variable bandwidth, having a width of from 1.4 MHz to 20 MHz. In addition, in a UMTS network in order to achieve further expansion of bandwidth and higher speed schemes successors scheme of LTE (e.g., LTE-Advanced (LTE-A)). For example, in LTE-A is planned to extend the maximum bandwidth of the system width of 20 MHz in the LTE specifications to approximately 100 MHz.

In the system according to the scheme of LTE (LTE system) there is a proposal to use a combination of hybrid ARQ (HARQ), which uses error correction (FEC: Forward Error Correction, forward error correction, and retransmission control (ARQ: Automatic Repeat reQuest, automatic repeat request) (see, for example, non-patent document 1). In this HARQ it is possible to effectively cope with, for example, with a random error on the side of the mobile terminal UE due to noise by requesting retransmission of the data, accepted with errors, from the mobile terminal UE.

In particular, in the LTE system, there is a proposal on the use of HARQ, which includes the soft combining. It HARQ using soft combining is the technique of obtaining the received data with high reliability by storing data, received with an error, the buffer memory for controlling re-transmission (more specifically, a buffer memory LLR (Log Likelihood Ratio, the log relationship of probability)) and combining these data with the data transmitted repeat�about later (re-transmitted data).

Non-patent document 1: 3GPP TS 36.212 "Multiplexing and Channel Coding"

With the above-described hybrid ARQ using soft combining, it is possible to obtain received data with high reliability, when the mobile terminal UE provided with a sufficient buffer memory (a"soft" buffer soft buffer memory) for retransmission control, and improve transmission characteristics when transmitting data. However, when the mobile terminal UE does not have sufficient soft buffer memory for controlling re-transmission, a situation may arise when transmission characteristics when transmitting data deteriorate.

Disclosure of the invention

Present group of inventions made in view of the above and, therefore, an object of the present group of inventions is the provision of method of controlling communication, mobile communication system and mobile terminal, through which it is possible to reduce deterioration of transmission characteristics in the transmission of data even in the case where the mobile terminal does not have sufficient soft buffer memory for controlling re-transmission.

Method for communication control in accordance with the present invention includes the following steps performed in the base station: performing channel coding information bits; performing the reconciliation process speed Kodirov�abilities of bits after channel coding; and transmission of the transmitted data corresponding to the length of the encoded bits after the speed negotiation in the mobile terminal; and the following steps performed in the mobile terminal: receiving the transmitted data; performing channel decoding of the received data; and discarding the pieces of received data in accordance with the size of the soft buffer memory of the mobile terminal and stored in the soft buffer memory.

According to a method for communication control in accordance with the present group of inventions prevented the drop in the base station part of the coded bits constituting data to be transmitted. Therefore, in the mobile terminal it is possible to improve transmission characteristics on the basis of data received (coded bits) containing these parity bits. As a result, even when the mobile terminal does not have sufficient soft buffer memory for controlling re-transmission, it is possible to reduce deterioration of transmission characteristics when transmitting data.

The technical result of the invention.

In accordance with the present group of inventions, even when the mobile terminal does not have sufficient soft buffer memory for controlling re-transmission, is still possible to reduce deterioration of transmission characteristics when transmitting data.

Brief description of the ERC�urchins

Fig.1 shows a chart for explaining a process in a base station of the LTE system when transferring data.

Fig.2 shows a schematic diagram for explaining a process in the base station and the mobile terminal in the LTE system when re-transmission of data.

Fig.3 shows a diagram for explaining a process in the base station and the mobile terminal in the LTE system when re-transmission of data.

Fig.4 shows a chart for explaining a process in the base station and the mobile terminal in the LTE system when re-transmission of data.

Fig.5 is a diagram for explaining steps of a method of communication control in accordance with this variant implementation of the data transfer.

Fig.6 presents a block diagram showing the configuration of a base station applying the method for communication control in accordance with the present variant implementation.

Fig.7 presents a block diagram showing the configuration of the mobile terminal using a method for communication control in accordance with the present variant implementation.

Fig.8 shows a diagram of a method of communication control in accordance with this variant implementation of the data transfer.

Fig.9 is a diagram for explaining steps of a method of communication control according to the first modified example of the data transfer.

Nafig.10 presents a block diagram, showing the configuration of a base station using a method of communication control according to the first modified example.

Fig.11 is a diagram for explaining a soft buffer specified in the buffer memory when the number of HARQ processes is equal to eight.

Fig.12 is a diagram for explaining an example of the case when the received data is processed according to a method for communication control in accordance with the second modified example.

Fig.13 is a diagram for explaining another example of the case where the received data is processed according to a method for communication control in accordance with the second modified example.

Fig.14 presents a block diagram showing the configuration of the mobile terminal using a method for communication control in accordance with the second modified example.

The implementation of the invention

Next, with reference to the accompanying drawings in detail described embodiment of the present invention. It should be noted that although the present invention will be made here and explained as a method of communication control and as a mobile terminal UE and the base station eNB to apply the way of communication, it is not any limitation. Any mobile communication system for application of the method �Board connection of the present invention or having the mobile terminal UE and the base station eNB, applying this control method, equally applicable.

First, with reference to Fig.1-4 describes the processes in the system of LTE data transmission. Fig.1 shows a chart for explaining a process in the base station eNB of the LTE system when transferring data. Fig.2-4 shows a diagram for explaining a process in the base station eNB and the mobile terminal UE of the LTE system when re-transmission of data. It should be noted that in Fig.2 shows the processes that are designed to execute when the software in the mobile terminal UE a sufficient buffer memory (buffer LLR memory, hereinafter referred to as "soft buffers") to manage re-transmission, which stores the received data with errors, and Fig.3 and 4 show the process for execution in the absence of sufficient size of the soft buffer in the mobile terminal UE.

During data transmission, the base station eNB first adds check bits using a cyclic redundancy check (CRC, cyclic redundancy check), which have a length of 24 bits to information bits to be consistent with the size of the transport blocks (TBS (transport block size), as shown in Fig.1. By adding CRC bits it is possible to determine whether there are errors in the transport block is decoded on the side of the mobile terminal. It should be noted that the determination result of decoding errors is used �of primer, to start a retransmission of Protocol data downward HARQ.

Then the base station eNB performs segmentation on code blocks in relation to the information bits, to which were added CRC bits. Through this segmentation on code blocks of the transport block is divided (segmented) into many code blocks in the range of the length unit defined in a turbo encoder. Base station eNB in the implementation of the segmentation code blocks adds to each code block CRC bits with a length of 24 bits. By adding a CRC to each code block as early as possible to determine the error of the decoded code blocks, and, as a result, to finish the decoding process to start the process of repetition in the earlier time.

Further, the base station eNB performs channel coding for each code block, to which was added CRC. In this case, for each code block, to which was added CRC, turbo coding is carried out with a code rate equal to 1/3, and are the coded bits with a bit length KW. The coded bits are subjected to channel coding, contain information bits (systematic bits) and parity bits (the first bit p1 and second parity bits p2 parity) in each code block.

In addition, the base station eNB performs a process of matching the speed from�oseney to coded bits, have undergone channel coding. In this case, more precise speed control for parity bits applies the matching rate by vitaliani (puncturing or repetition. Here, the process speed negotiation speed is 1/2 to obtain the coded bits with the bit length, I.e., the Coded bits that have passed the matching rate, modulated in accordance with a predetermined modulation scheme and then transmitted to the mobile terminal UE in downlink.

When data is transmitted from the base station eNB may thus assume that the error is found in the received data in the mobile terminal UE. When HARQ is applied to provide a soft combining, the mobile terminal UE stores the received data with error (originally transmitted the received data in the soft buffer, as shown in Fig.2. Then from the mobile terminal UE is requested retransmission of the received data includes an error.

As shown in Fig.2, when provided with sufficient soft buffer in the mobile terminal UE (more specifically, when the size of the Ncb soft buffer is equal to or greater than the bit length Kw coded bits after channel coding (hereinafter "the bit length of Kwchannel coding")), and the mobile terminal UE accepted the request for re-transmission, the base eNB passes the portion of the parity bits, included in the coded bits after channel coding, as a re-transmitted data. In this case, the re-transmitted data stored in the soft buffer in the mobile terminal UE (received data after retransmission). In the mobile terminal UE, it is possible to achieve high reliability of the received data by combining these re-transmitted data and received data stored in the soft buffer (initially transmitted data received).

It should be noted that for HARQ soft combining is divided into a CC (Chase Combining, tracking combining) and IR (Incremental Redundancy, increasing redundancy). SS refers to a transmission scheme when re-transmission of the same data bits, parity, and that parity bits are used in the initial transmission. IR refers to a transmission scheme when re-transmission of data bits parity different from the parity bits, used in the initial transmission. Parity bits that should be retransmitted from the base station eNB in response to the request for re-transmission, modified in accordance with the HARQ type, used for soft combining.

Meanwhile, as shown in Fig.3 and 4, when the mobile terminal UE provided enough soft buffers (more specifically, when the size of Ncbsoft buffer is less than the bit length of Kwto�tional encoding) base station eNB performs a process of discarding parity bits (the Process of discarding, discarding process) before the process speed negotiation. In this process of discarding the parity bits included in the coded bits after channel coding are discarded in accordance with the size of Ncbsoft buffer provided in the mobile terminal UE. More specifically, the reset portion of the parity bits larger than Ncbsoft buffer. It should be noted that the size of Ncbsoft buffer reported from the mobile terminal UE to the base device eNB as part of capabilities (capability information) at the beginning of the connection.

Here the size of Ncbsoft buffer in the mobile terminal UE end. In addition, the Ncb size of the soft buffer varies depending on conditions of communication with the base station eNB. For example, the size of Ncbsoft buffer may be divided according to the number of HARQ processes (a maximum of eight processes) performed between the mobile terminal UE and the base station eNB, and the number of code words (a maximum of two code words) in the transmission MIMO (Multi Input Multi Output, multiple inputs, multiple outputs). In such cases, the size of Ncbsoft buffer is made smaller in accordance with the number of such divisions. In addition, as in the system of LTE-A, with IP�olshanii carrier aggregation to expand the bandwidth of the transmission, the size of Ncbsoft buffer may be divided according to the number of fundamental frequency blocks (hereinafter, the "component carrier" (component carriers) used for communication, and made even less.

Fig.3 shows a case where the size of Ncbsoft buffer in the mobile terminal UE is equal to or greater than the bit length of E coded bits after the speed negotiation (hereinafter referred to as "the length E of coded bits after the speed negotiation"). When the size of Ncbsoft buffer is smaller than the bit length of Kwchannel coding, but more than the length E of coded bits after the speed negotiation, the characteristics of the transmission with the originally transmitted data supported the same as when the size of Ncbsoft buffer is equal to or greater than the bit length of Kwchannel coding (case shown in Fig.2).

On the other hand, Fig.4 shows a case where the size of Ncbsoft buffer in the mobile terminal UE is less than the length E of coded bits after the speed negotiation. When the size of Ncbsoft buffer is less than the length E of coded bits after the speed negotiation, a part of information bits is copied through a process of repetition when negotiating speed. In this case, the coded bits after the speed negotiation contain cha�th overlapping information bits. Then the transmitted data corresponding to coded bits, data bits for which overlap, are transmitted to the mobile terminal UE. In this case, taking into account the reduction in the number of discarded bits parity transmission characteristics deteriorate as compared to the case in which the size of Ncbsoft buffer is equal to or greater than the bit length of Kwchannel coding (case shown in Fig.2).

Thus, when the mobile terminal UE is provided is not sufficient soft buffer, the portion of the parity bits are discarded in the base station eNB in accordance with the size of Ncbsoft buffer. It should be noted that when the size of the soft buffer is even less information bits are also appropriately discarded. Parity bits are cast in the base station eNB used in a mobile terminal UE, thereby improving the transmission characteristics when transmitting data. The authors of the present invention focused on the fact that the transmission characteristics in the transmission of data intended for use when discarding these parity bits in the base station eNB without the use in the mobile terminal UE, thereby arriving at the present invention.

The essence of the present invention is that the base station eNB coded bits after kenalog� encoding is not discarded in accordance with the size of N cbsoft buffer, and transmitted data to be transmitted corresponding to the length E of coded bits after the speed negotiation, and in the mobile terminal UE transmitted data is received and decoded, and when in received data of the error portion of the received data is discarded in accordance with the size of Ncbsoft buffer and stored in the soft buffer. Thus it is possible to prevent the drop part of the parity bits in the base station eNB in accordance with the size of Ncbsoft buffer and improve transmission characteristics in the mobile terminal on the basis of these parity bits so that, even when not provided with sufficient soft buffer, it is possible to reduce deterioration of transmission characteristics when transmitting data.

Fig.5 is a diagram for explaining processes in a method of communication control according to this embodiment of the data transmission. Fig.5 shows the case implemented with insufficient soft buffer in the mobile terminal UE. In particular, Fig.5 shows a case where the size of Ncbsoft buffer in the mobile terminal UE is less than the length E of coded bits after the speed negotiation.

According to a method for communication control in accordance with this variant implementation, the base station eNB does not process drop-coded�s bits after channel coding before the reconciliation process speed regardless of the size of N cbsoft buffer in the mobile terminal UE. In this case, as shown in Fig.2, as with sufficient soft buffer (more specifically, when the size of Ncbsoft buffer is equal to or greater than the bit length of Kwchannel coding), the base station eNB applies the process speed negotiation to coded bits subjected to channel coding. Then, the base station eNB transmits the transmitted data corresponding to the length E of coded bits after the speed negotiation, the mobile terminal UE.

The mobile terminal UE receives and decodes these transmitted data. In this case, the process of rejection is not performed in the base station eNB. Therefore, the coded bits constituting the received data do not include information copied bits and contain the same parity bits, as in the case when provided with sufficient soft buffer. By decoding these received data in the mobile terminal UE when originally transmitted data, it is possible to obtain the same transmission characteristics as in the case when provided with sufficient soft buffer. Therefore, in the mobile terminal UE, even when the soft buffer is not enough, still it is possible to reduce deterioration of transmission characteristics when transmitting data. At this time, the mobile terminal UE calculates and preserves�t LLR transmitted coded bits using instant buffer.

When in received data errors of the mobile terminal UE discards the portion of the received data in accordance with the size of Ncbsoft buffer and stores in the soft buffer (process drop). This may still be adequate to keep a portion of the received data in the soft buffer, as in the case of the implementation process of the drop in the base station eNB, even when not provided with sufficient soft buffer. When re-transmitted data is transmitted from the base station eNB in response to the request for re-transmission from the mobile terminal UE, the mobile terminal UE combines the re-transmitted data with the received data stored in the soft buffer.

Fig.6 shows a block diagram illustrating a configuration of a base station eNB using a method of communication control in accordance with the present variant implementation. It should be noted that the base station eNB shown in Fig.6 has been simplified in order to clarify the method for communication control in accordance with the present invention, it is assumed that the base station has a configuration, which typically has a base station eNB used in the LTE system or the system of LTE-A.

As shown in Fig.6, the base station eNB includes a module 101 add CRC module 102 of channel coding, paramedical 103, the module 104 ol�process the drop the module 105 speed negotiation, the buffer memory 106, the module 107 modulation module 108 control. Base station eNB shown in Fig.6, carries out the processes necessary to transfer data or repeated transmission data shown in Fig.1-4 under the control module 108 controls. In particular, the base station eNB shown in Fig.6, switches between implementation and non-implementation of the process of rejection of coded bits after channel coding depending on the communication capabilities of the mobile terminal UE under the control module 108 controls.

Module 101 add adds CRC bits CRC for error checking the packet data blocks to the received information bits. Here information bits are appended CRC bits with a length of 24 bits. In addition, the module 101 add adds CRC bits CRC to each code block after the segmentation code blocks.

The module 102 of channel coding encodes the packet data containing the CRC bits using a predetermined encoding scheme with a predetermined code rate. More specifically, the module 102 performs channel coding turbo coding with code rate 1/3 and receives coded bits. Packet data is encoded into systematic bits and parity bits, which are bits of error checking for�tematicheskih bits. It should be noted that the code rate used in the module 102 of channel coding is set by module 108 control. Although there is described a case in which use of turbo coding with code rate 1/3, it is possible to use other code rates, and other encoding schemes.

Premarital 103 randomly reorders the order of the coded bits after channel coding (the process of interleaving (interleaving)). The interleave process is performed to minimize data loss due to packet errors. It should be noted that the reordered coded bits stored in the buffer memory 106 for the second transmission. When receiving from the mobile terminal UE the request for re-transmission under the control module 108 control some or all of the transmitted packets stored in the buffer memory 106, are fed into the module 107 modulation.

The module 104 process discard-discards the portion of the coded bits (parity bits). For example, when the mobile terminal UE supports only system LTE Rel. 8, and in the mobile terminal UE is not provided with sufficient soft buffer, the portion of the coded bits is discarded after channel coding (see Fig.3 and 4). On the other hand, when the mobile terminal UE supports a method of controlling a communication in accordance with this izobreteny�m, the module 104 process drop process does not drop encoded bits after channel coding. In this case, whether the module 104 process drop to the drop, is determined in accordance with commands from the module 108 control. That is, whether the process of the drop varies in accordance with the information on the features (including the size of the soft buffer of a mobile terminal UE, from a given module 108 control.

The module 105 speed negotiation negotiates speed coded bits by performing the repeat and vitaliani in relation to the coded bits. For example, the module 105 speed negotiation performs a puncturing when the length of Kwcoded bits after channel coding is greater than the length E of coded bits after the speed negotiation (see Fig.3 and 5). On the other hand, the module 105 speed negotiation shall repeat when the length of Kwcoded bits after channel coding is shorter than the length E of coded bits after the speed negotiation (see Fig.4).

Module 107 modulation modulates the coded bits supplied from the module 105 speed negotiation (or from the buffer memory 106) at a predefined modulation scheme. It should be noted that the modulation scheme, use�I in module 107 modulation, set module 108 control. The modulation scheme may be, for example, the scheme is QPSK (Quadrature Phase Shift Keying, quadrature phase shift keying), 8PSK, 16QAM (Quadrature Amplitude Modulation, quadrature amplitude modulation) and 64QAM. The coded bits that have passed the modulation module 107 modulation, are transmitted to the mobile terminal UE in the downlink as the transmitted data.

The module 108 controls the overall operation of the base station eNB. For example, the module 108 control code determines the speed of the module 102 of channel coding and modulation scheme in the module 107 modulation in accordance with the current state of the radio channel. In addition, the module 108 determines whether the module 103 of the process of drop to drop in accordance with the information on the features (including the size of the soft buffer) notified from the mobile terminal UE at the beginning of the connection. In addition, the module 108 control manages the retransmission in accordance with the response signals (ACK/NACK) transmitted from the mobile terminal UE. When adopted, the response signal ACK (Acknowledge, confirm) the corresponding received packets in a buffer memory 106 are removed. On the other hand, when adopted, a feedback signal NACK (Non-Acknowledge, negative acknowledge), part or all of the relevant prior�record the packets in the buffer memory 106 is retrieved and re-transmitted to the mobile terminal UE via the module 107 modulation.

Fig.7 shows a block diagram illustrating a configuration of the mobile terminal UE using the method of communication control in accordance with the present variant implementation. It should be noted that the mobile terminal UE shown in Fig.7, is simplified in order to clarify the method for communication control in accordance with the present invention, it is assumed that the mobile terminal has a configuration, which is usually the mobile terminal UE for use in the LTE system or LTE-A.

As shown in Fig.7, the mobile terminal UE includes a module 201 demodulation, reverse premarital 202, the module 203 combining module 204 of the process of the drop, the buffer memory 205, the module 206 of the channel decoding module 207 checks CRC and module 208 controls. The mobile terminal UE shown in Fig.7, discards the portion of the received data and stores them in the soft buffers under the control module 208 controls, as shown in Fig.5.

Module 201 demodulating demodulates data received from the base station eNB (the received data). In this case, the module 201 demodulate demodulate the received data using a demodulation scheme corresponding to the modulation scheme used in the module 107 modulation base station eNB. Through this are the coded bits contained in the received data.

Return AC�resident 202 performs the reverse process of the interleaving (deinterleaving) and the coded bits, supplied from the module 201 demodulation. In this case the inverse premarital 202 performs the reverse process of the interleaving method of the inverse interleave, corresponding to the method of alternation in premarital 104 base station eNB.

Module 203 for combining combines the coded bits of the same packet stored in the buffer memory 205, with accepted currently coded bits. When the buffer memory is missing coded bits of the same packet, i.e., when the initial transmission, the module 203 combining the outputs taken at the moment the coded bits in the module 204 of the process and drop the module 206 of the channel decoding.

Module 204 of the process of discarding discards the portion of the coded bits from the module 203 combining. Module 204 of the process of discarding discards the portion of the coded bits from the module 203 combining in accordance with the size of the soft buffer that is specified in the part or whole of the buffer memory 205. More specifically, the module 204 of the process of discarding discards the portion of encoded bits is greater than the size of the soft buffer (parity bits). It should be noted that when the size of the soft buffer is equal to or greater than the length of the coded bits from the module 203 combining, part of the coded bits is discarded.

In the soft buffer (buffer memory 205) cover�safety coded bits, partially discarded in module 204 of the process of rejection. In addition, the coded bits, which are not subjected to the process of the drop in module 204 of the process of rejection, are also retained. Coded bits, which are stored, are used for combining the coded bits, which are taken again in module 203 combining. Thus, when the coded bits larger than the size of a soft buffer, the portion of the coded bits is discarded in module 204 of the process of rejection and stored in the soft buffer. Consequently, even when the mobile terminal UE is not provided with sufficient soft buffer, it is still possible to adequately maintain the portion of the received data (coded bits) in the soft buffer as in the case where the process of discarding is performed in the base station eNB.

The module 206 channel decoding reconstructs the coded bits from the module 203 by combining the implementation of the decoding at a predefined decoding scheme. In this case, the module 206 channel decoding scheme uses a turbo-decoding corresponding to the encoding scheme in the module 102 of channel coding base station eNB. By decoding coded bits according to the scheme of turbo-decoding reconstructed information bits on the basis of the systematic�x bits and parity bits.

Module 207 test CRC retrieves the CRC bits from the decoded bits of information in a batch blocks. Then using the extracted bit CRC is determined whether the packet error. The result, defined in the module 207 checks the CRC, is output from the module 208 controls. Information bits in the packet to which module 207 checks the CRC identified the absence of error, are served on the upper level.

Module 208 controls the overall operation of the mobile terminal UE. For example, when in accordance with the result of the determination module 207 checks the CRC of the packet has no errors, the module 208 control transmits a response signal ACK, which acknowledges receipt of the packet, the base station eNB. On the other hand, when a packet has an error, the module 208 control transmits a response signal NACK to the base station eNB. When the transfer response signal ASC module 208 control initializes soft buffers. In this case, the coded bits in the soft buffer corresponding to the packet are removed. On the other hand, when the transfer response signal NACK soft buffers are not initialized. In this case, the coded bits in the soft buffer corresponding to the packet, remain.

Fig.8 is a diagram illustrating a method of controlling a communication in accordance with this variant implementation during the data transmission. Fig.8 it is assumed that the mobile terminal UE supports this method of communication control. Also, Fig.8 it is assumed that the mobile terminal UE, the size of the soft buffer is less than the length E of coded bits after the speed negotiation. In addition, in Fig.8 shows the process performed when the initial data transmission from the base station eNB to the mobile terminal UE.

As shown in Fig.8, in which a combination of data bits, the module 101 add adds CRC bits CRC for error checking the packet data blocks (step ST 801). When packet data containing the bits of the CRC are taken from the module 101 of adding CRC, module 102 performs channel coding channel coding scheme turbo coding with code rate 1/3 and receives coded bits (step ST 802).

Premarital 103 reorders (alternates) random order of encoded bits after the speed negotiation (step ST 803). Reordered coded bits stored in the buffer memory 106 for retransmission, but this is not shown in Fig.8. The module 105 speed negotiation negotiates speed in relation to the coded bits after reordering (step ST 804). In this case, the mobile terminal UE supports the present method of controlling the connection, so that the module 104 process drop process does not drop encoded bits. Therefore, as shown in Fig.4, the coded bits of the last� speed negotiation does not contain information bits overlapping. As shown in Fig.2, the coded bits after the speed negotiation contain the same parity bits, as and when sufficient soft buffer.

Module 107 modulation modulates the coded bits originating from premaritale 103 (or from the buffer memory 106), at a predefined modulation scheme (step ST 805). The coded bits that have passed the modulation module 107 modulation, are transmitted in downlink to the mobile terminal UE in the quality of the transmitted data (step ST 806).

Transmitted data from the base station eNB are taken in the mobile terminal UE (step ST 807). Module 201 demodulate demodulate these received data (step ST 808). In this case, the received data demodulated on the demodulation scheme corresponding to the modulation scheme used in the module 107 modulation base station eNB. Reverse premarital 202 performs the process of reverse alternation relative to the demodulated coded bits (step ST 809).

Past reverse interleaving the coded bits are output in the module 203 combining. Here transmitted data from the base station eNB are initially transmitted data, therefore, the coded bits corresponding to the same packet, it is not stored in the buffer memory (soft buffers) 205. The module 206 channel decoding reconstructs the coded bits from the module 203 combs�design by performing decoding at a predefined decoding scheme (step ST 810). In this case, the coded bits are subjected to channel decoding scheme of the turbo-decoding corresponding to the encoding scheme in the module 102 of channel coding base station eNB. Thus reconstructed information bits contained in the transmitted data.

In module 207 checks the CRC bits are extracted CRC in packet units from the reconstructed information bits. Then using the extracted CRC bits is checked whether the packet error (CRC check: step ST 811). Information bits in the packet to which module 207 checks the CRC identified the absence of error, are served on the upper level.

Parallel to the process channel decoding in step ST 810 encoded bits are output from the module 203 in combination module 204 of the process of rejection. Module 204 of the process of discarding discards of these coded bits (step ST 812). In this case, provided that the size of the soft buffer is less than the length E of coded bits after the speed negotiation, the segment of coded bits, which exceeds the size of the soft buffer (parity bits) are discarded. Then, partially discarded coded bits stored in the buffer memory (soft buffers) 205 (step ST 813).

Thus using the method of communication control in accordance with this variant implementation of the perturbation�but to prevent the drop portion of encoded bits, components of the transmitted data, the base station eNB. Therefore, in the mobile terminal UE, it is possible to improve transmission characteristics based on the received data (coded bits, including the parity bits. As a result, in the mobile terminal UE is possible to reduce deterioration of transmission characteristics when transmitting data even when not provided with sufficient soft buffer.

During initial transmission in accordance with the sequence shown in Fig.8, and when it detects an error in received data is requested retransmission of the transmitted data by transmitting NACK response signal from the mobile terminal UE in the base station eNB. Meanwhile, the coded bits stored in the buffer memory 205 and stay there.

When receiving a request for re-transmission to the base station eNB re-transmits the respective data to be transmitted from the buffer memory 106. Re-transmitted data will be fed into the module 203 combining passing through the demodulation process and the process of reverse alternation, as for the originally transmitted data being transmitted. Module 203 for combining combines the coded bits of these re-transmitted data and the coded bits corresponding to the accepted data stored in the buffer memory (soft buffers) 205. Then the coded bits after the combination of violets� as information bits, passing channel decoding and CRC check. It should be noted that when it detects an error in the re-transmitted data is repeated the same control re-transmission.

In General, when performing retransmission control base station eNB may use the scheme for the second transmission of the same bit sequence as that for the previous transfer (e.g., SS (track combine)), or may use the scheme for retransmission bit sequence that is different from the previous transmission (e.g., IR (increasing redundancy)). Usually in every case of re-transmission using a single transmission scheme. When using repeats the General pattern of the transmission to improve the performance of data transmission is unlikely.

Therefore, in the method for communication control in accordance with this variant implementation, when performing retransmission control scheme for transmission parity bits changed many times. That is, when the retransmission control is performed, the preset number of times with the SS scheme, the scheme of transfer bits parity switches on the IR scheme, and management of re-transmission. On the other hand, when the retransmission control performed a pre-set quantities� times when the IR scheme, scheme of transmission bits parity switches to the SS scheme and management of re-transmission.

By changing thus the transmission schemes for parity bits using a predetermined number of times the mobile terminal UE may combine the encoded bits to comply with the accepted data, using multiple parity bits. As a result, as compared to the case of repetition of using the same transmission scheme for parity bits it is possible to improve transmission characteristics when re-transmission of data.

The transfer scheme for parity bits is changed in the module 108 control. That is, in this case, the module 108 control functions as a module change. In this case, the module 108 control change transmission scheme for parity bits based on the encoded bits after channel coding, stored in the buffer memory 106. More specifically, the scheme of transmission of parity bits is changed by changing bits parity selected as the re-transmitted data among parity bits contained in the coded bits after channel coding.

Fig.9 is a diagram for explaining processes of a method of communication control according to the first modified example of the present embodiment of the data transfer. As in Fig.5, Fig.9 while�an process, executed when the software in the mobile terminal UE sufficient soft buffer. In particular, Fig.9 shows a case where the size of Ncbsoft buffer in the mobile terminal UE is less than the length E of coded bits after the speed negotiation.

In the method of communication control according to the first modified example of the base station eNB performs a process of discarding a certain number of coded bits after channel coding before the reconciliation process speed regardless of the size of Ncbsoft buffer in the mobile terminal UE. That is, in the mobile communication system using a mobile terminal, being configured to transmit and receive on multiple component carriers, above a certain number of encoded bits is determined by the size of the soft buffer memory of the mobile terminal, which has the ability to transmit and receive on only one component carrier, regardless of the number of component carriers. However, the base station eNB performs a process of discarding within, in which the length of the encoded bits after the process of the drop is greater than the length E of coded bits after the speed negotiation. For example, the base station eNB performs a process of discarding in accordance with LTE specifications defined in Relase 8 (version 8) (next Rel.8 LTE"). In this case, the process of rejection is applied to the coded bits after channel coding in accordance with the size of Ncbsoft buffer corresponding to one component carrier regardless of the number of component carriers, in fact, used in the mobile terminal UE. Thus, there is an advantage that can be used by a base station standard Rel.8 LTE.

Next, the base station eNB applies the process speed negotiation to partially discarded coded bits after channel coding. Then the base station eNB transmits the transmitted data corresponding to the length E of coded bits after the speed negotiation, the mobile terminal UE.

The mobile terminal UE receives and decodes these transmitted data E. In this case, the base station eNB, the process of discarding is performed regardless of the size of Ncbsoft buffer, and, in addition, the process of the drop is limited to that in which the length of the encoded bits after the process of rejection is greater than the length E of coded bits after the speed negotiation. Therefore, the coded bits constituting the received data, does not contain a copy of the information bits and contain the same parity bits, as in the case sufficient soft buffer. By decoding e�their received data in the mobile terminal UE when originally transmitted data it is possible to achieve the same transmission characteristics, and while providing sufficient soft buffer. Therefore, in the mobile terminal UE even when there is sufficient soft buffer is still possible to reduce deterioration of transmission characteristics when transmitting data.

When it detects an error in received data, the mobile terminal UE discards the portion of the received data in accordance with the size of Ncbsoft buffer and stores them in the soft buffer (process drop). Thereby, even when not provided with enough soft buffers may still be adequate to keep a portion of the received data in the soft buffer when the process of discarding implemented in the base station eNB. When transmitting from the base station eNB re-transmitted data in response to the request for re-transmission from the mobile terminal, the mobile terminal UE UE combines the re-transmitted data and received data stored in the soft buffer.

Fig.10 shows a block diagram showing the configuration of a base station eNB using a method of communication control according to the first modified example. It should be noted that similarly to the base station eNB in accordance with the above variant implementation, shown in Fig.6, the base station eNB shown in Fig.10, assumed to have the configuration that typically has a base station eNB used in SIS�EME LTE system or LTE-A. It should be noted that the mobile terminal UE to perform the method of communication control according to the first modified example is identical with the mobile terminal UE (Fig.7) in accordance with the above variant of implementation and, accordingly, its explanation is not given.

Base station eNB shown in Fig.10, differs from the base station eNB in accordance with the above variant of the implementation of the module 104A process drop. It should be noted that of the base station eNB shown in Fig.10, which coincide with the base station eNB (Fig.6) in accordance with the above variant of the implementation will have the same numeric symbols, and their explanation is not given.

Module 104A of the process of the drop differs from module 104 process of rejection in accordance with the above variant of implementation that discards a certain number of coded bits after channel coding, when the mobile terminal UE supports a method of communication control according to the first modified example, in the mobile terminal UE is not provided with sufficient soft buffer. Module 104A of the process of rejection is in the process of the drop in the extent to which the length of the encoded bits after the process of rejection is greater than the length E of codiovan�x bits after the speed negotiation.

More specifically, the module 104A of the process of rejection is in the process of discarding in accordance with LTE specifications defined in Release 8 (hereinafter "Rel.8 LTE"). In this case, the module 104A process of discarding process applies to drop-coded bits after channel coding in accordance with the size of the soft buffer corresponding to one component carrier. When the drop is applied in accordance with the size of the soft buffer corresponding to one component carrier, the length of the encoded bits after the drop becomes less than the length E of coded bits after the speed negotiation.

If the communication uses multiple component carriers, the size of the soft buffer of the mobile terminal UE is reduced in accordance with the number of component carriers. In line with this, it is possible that the size of the soft buffer is less than the length E of coded bits after the speed negotiation. Module 104A of the process of rejection is in the process of discarding in accordance with the size of the soft buffer corresponding to a component carrier, even when the communication uses multiple component carriers. Thereby it is possible to reliably prevent reduction in the length of encoded bits of polepieces drop down to less than the length E of coded bits after the speed negotiation. Therefore, the coded bits constituting the data received in the mobile terminal UE (received data), do not contain copies of parts information bits and contain the same parity as compared to the case where there is sufficient soft buffer. By decoding these received data to the mobile terminal UE when originally transmitted data is possible to obtain the same transmission characteristics as in providing sufficient soft buffer. Therefore, in the mobile terminal UE, even when not provided with sufficient soft buffer is still possible to reduce deterioration of transmission characteristics when transmitting data. In addition, because they can be used system specifications Rel.8 LTE, not necessarily to define a new control.

It should be noted that like the module 104 process of rejection in accordance with the above variant implementation, the module 104A of the process of rejection has, for example, the function of discarding a part of the coded bits after channel coding, when the mobile terminal UE supports only the system Rel.8 LTE, and the mobile terminal UE is not sufficient soft buffer (see Fig.3 and 4). In this case, the module 104A of the process of the drop changes the process of rejection in accordance with the commands from the module 108 control. That is, the process of discarding varies in accordance with the information on the features (including the size of the soft buffer of a mobile terminal UE, issued from the module 108 control.

The above method of communication control in accordance with this variant implementation and method of communication control according to the first modified example is considered using soft buffers in the buffer memory 205 of the mobile terminal UE. However, based on the possibility of efficient use of buffer memory 205, in which you set the soft buffers further modifications. The following describes a second modified example for the efficient use of buffer memory 205, in which you set the soft buffers.

As described above, the size of the soft buffer in the mobile terminal UE is segmented in accordance with, for example, the number of HARQ processes (a maximum of eight processes) performed between the mobile terminal UE and the base station eNB, etc. In Fig.11 is a diagram for explaining a soft buffer specified in the buffer memory 205 when the number of HARQ processes is equal to eight. In this case, the buffer memory 205 is segmented into eight soft buffers SB 1 - SB 8 in accordance with the HARQ process (HARQ process 1 - process 8 HARQ), as shown in Fig.11. It should be noted that the size of the soft buffer corresponding to the number�TSS HARQ processes, it is reported to the mobile terminal UE that has permanent resources through the installation process call.

However, even when the buffer memory 205 segmented thus, in the actual management of re-transmission is not necessarily used all soft buffers SB 1 - SB 8. The retransmission control for the most part depends on the state of the radio channel, and the number of required soft buffer may vary. Consequently, even when the buffer memory 205 is segmented, as shown in Fig.11, in the actual management of re-transmission is often used only part of the soft buffers (see Fig.12A). For example, as soft buffers are mandatory for combining the packets in the retransmission control, among the soft buffers may reduce the number of buffers by retaining only the HARQ processes in which errors were found.

In the method for communication control in accordance with the second modified example of the present invention in the mobile terminal has been in a state of use of a plurality of soft buffer specified in the buffer memory 205, and in accordance with the usage status of a memory location (more specifically, the soft buffers) to store the pieces of received data change. For example, in the method for communication control in accordance with the second modified �the reamer portion of the received data is stored in a multitude of soft buffers, including soft buffers that are not used in the management of re-transmission, among the many soft buffer specified in the buffer memory 205. Thereby without restriction in one segmentarray mild buffer, it is possible to effectively use a variety of soft buffers, and thereby improve the performance of data transmission.

Fig.12 is a diagram for explaining an example of the case when the received data is processed according to the method of communication control in accordance with the second modified example. Fig.12A shows the case where among eight soft buffers SB 1 - SB 8 that are set in the buffer memory 205, in the actual management of re-transmission used part (four) soft buffer SB 1 - SB 4. That is, the remaining soft buffer SB 5 - SB 8 are not used and are in the pending state for use in retransmission control.

In the method for communication control in accordance with the second modified example, as shown in Fig.12A, the received data is processed using soft buffers SB 5 - SB 8, which are not used in the actual management of re-transmission. For example, as shown in Fig.12B, the soft buffer SB 8 for HARQ process 8 temporarily used as a soft buffer of the HARQ process 1. In this case, even when a part of the received data cannot be stored in the soft buffer SB1, which was originally designed for HARQ process 1, this part can be stored in the soft buffer SB 8 for HARQ process 8. As a result it is possible to flexibly handle the received data from the base station eNB.

Fig.13 is a diagram for explaining another occasion, when the received data are processed using the method of communication control in accordance with the second modified example. In the method for communication control in accordance with the second modified example, as shown in Fig.13, eight soft buffers SB 1 - SB 8 that are set in the buffer memory 205, shared and managed by multiple component carriers (two component carriers in Fig.13). In addition, in the soft buffer SB 1 - SB 8 are assigned HARQ processes in which found error on each component carrier.

For example, when the error is found in the processes 1, 3 and 5-7 HARQ on the first component carrier (component carrier 1, SS 1) and the error was found in processes 1-3 HARQ on the second component carrier (CC 2), as shown in Fig.13A, the HARQ process in which an error is found, are assigned to soft buffers SB 1 - SB 8. Buffers of processes in which when re-transmission is transferred to the ASC, cleaned and assigned to other processes in which found error. After that, when you go into a situation in which the error was found in the HARQ process 1 in the first component carrier (CC 1) and Osh�BSA was found in the processes 1-7 HARQ on the second component carrier (CC 2), as shown in Fig.13, the HARQ process in which an error is found, are assigned to soft buffers SB 1 - SB 8. It should be noted that when multiple component carriers used in communication, the error was found more than eight HARQ processes, the packet is not stored in the buffer memory 205 and is discarded. By sharing and management of soft buffers among the plurality of component carriers thus it is possible to effectively use the limited soft memory and improve the performance of data transmission.

Fig.14 shows a block diagram to illustrate the configuration of the mobile terminal UE using the method of communication control in accordance with the second modified example. It should be noted that similarly to the mobile terminal UE in accordance with the above variant implementation, shown in Fig.7, it is assumed that the mobile terminal UE shown in Fig.14 has a configuration that is usually mobile terminal UE for use in the LTE system or LTE-A. it Should be noted that the base station eNB used for implementing the method for communication control in accordance with the second modified example, coincides with the base station eNB (Fig.6 and Fig.10) in accordance with the above variant of the implementation or the first modified example, and, accordingly�NGOs, its description is not given.

The mobile terminal UE shown in Fig.14, differs from the mobile terminal UE in accordance with the above variant of the implementation of the module 208A management. It should be noted that the details of the mobile terminal UE shown in Fig.14, which coincide with the mobile terminal UE (Fig.7) in accordance with the above variant of implementation, will have the same numeric designations and their explanation is not given.

Module 208A management has, in addition to the function module 208 control the mobile terminal UE in accordance with the above variant implementation, management of the buffer memory 205, which are required in the method of communication control in accordance with the second modified example (hereinafter referred to as "memory management functions"). Here the memory management functions include a first function of management of soft buffers used for retransmission control, and soft buffers used in the management of re-transmission, among the many soft buffer specified in the buffer memory 205. In addition, the memory management functions include the second function of soft buffers of the HARQ processes that are not used in the management of re-transmission, for other soft buffers of the HARQ processes. In addition, function in�manage ment memory includes a third function of issuing permits soft buffer for the HARQ process, assigned to other soft buffer for the HARQ process of the second function, to resume functioning as the source of the soft buffer of the HARQ process. In addition, the memory management functions contain a fourth function of management (the process of rejection) module 204 process the drop, when the soft buffers of the HARQ processes that are not used in the management of re-transmission, assigned to other soft buffers of the HARQ processes of the second function.

In the method for communication control in accordance with the second modified example of the mobile terminal UE processes the received data using a variety of soft buffers, including soft buffers that are not used to control retransmission, among the many soft buffers that are set in the buffer memory 205. Through this means, without limitation, one-segmented soft buffer it is possible to effectively use a variety of soft buffers so that it is possible to flexibly handle taken from the base station eNB data and improve the performance of data transmission. In particular, when a lot of soft buffer specified in the buffer memory 205 are shared among multiple component carriers, it is possible to effectively use a soft buffers and further improve the transmission characteristics of the data.

Thus, although the present invention is described in detail with reference to the above variant implementation, for specialists in the art should be obvious that the present invention is in no way limited to variants of implementation, are given in the description. The present invention can be implemented with various correction�AMI and various modifications without deviation from the essence and scope of the present invention, determined driven by the claims. Consequently, the presentation of these descriptions are given only by way of explanation, examples and should not be used to limit the present invention in any way.

The disclosure of Japanese patent application No. 2011-002448, filed January 7, 2011, and Japanese patent application No. 2011-029143, filed February 14, 2011, including descriptions, drawings and abstracts, are fully incorporated herein by reference.

1. A method of controlling a communication intended for the base station and the mobile terminal, configured to transmit and receive on multiple component carriers, which includes the following steps performed in the base station:
performing channel coding information bits;
the reconciliation process speed of coded bits after channel coding; and
transmission of the transmitted data corresponding to the length of the encoded bits after the speed negotiation in the mobile terminal; and the following steps performed in the mobile terminal:
receiving the transmitted data;
performing channel decoding of the received data; and
if the received data found error, the retention of a portion of the received data in the soft buffer memory of the mobile terminal in accordance with the size of the soft buffer memory,
the base station�I define the length of the encoded bits after channel coding on the size of the soft buffer memory of the mobile terminal, is arranged to transmit and receive on only one component carrier, regardless of the number of component carriers.

2. A method according to claim 1, characterized in that the base station discards a certain number of coded bits after channel coding in accordance with the size of the soft buffer memory of the mobile terminal, configured to transmit and receive on a single component carrier.

3. A method according to claim 1 or 2, characterized in that, if the received data found error, the mobile terminal discards the portion of the received data in accordance with the size of the soft buffer memory.

4. A method according to claim 1 or 2, characterized in that the base station process speed negotiation is performed without discarding coded bits after channel coding in accordance with the size of the soft buffer memory.

5. A method according to claim 1 or 2, characterized in that it further comprises the step of re-transmission data transmitted when the base station accepts the request retransmission for data received from the mobile terminal,
moreover, in accordance with the number of retransmissions of the transmitted data is carried out by switching of circuits traceable combining and increasing redundancy schemes which transmit bits parity.

6. System mobile St�z, containing a base station and a mobile terminal, being configured to transmit and receive on multiple component carriers,
wherein the base station comprises
the channel coding module, configured to implement channel coding information bits;
module speed negotiation, made with the possibility of implementation of the reconciliation process speed of coded bits after channel coding; and
transmission module, configured to transmit the transmitted data corresponding to the length of the encoded bits after the speed negotiation in the mobile terminal;
a mobile terminal includes
receiving module, configured to receive the transmitted data;
module channel decoder configured to channel decode the received data; and
a processing module, configured to save a portion of the received data in the soft buffer memory of the mobile terminal in accordance with the size of the soft buffer memory if the received data found error,
the base station is arranged to determine the length of the encoded bits after channel coding on the size of the soft buffer memory of the mobile terminal, configured to transmit and receive on only one component� carrier regardless of the number of component carriers.

7. A system according to claim 6, characterized in that the base station further comprises a process module of the drop, made with the possibility of discarding a certain number of coded bits after channel coding before the reconciliation process speed in accordance with the size of the soft buffer memory of the mobile terminal, configured to transmit and receive on a single component carrier.

8. A method according to claim 6 or 7, characterized in that, if the received data found error, the processing module is arranged to drop part of the received data in accordance with the size of the soft buffer memory.

9. A system according to claim 7, characterized in that, when the base station accepts the request retransmission for data received from the mobile terminal, in accordance with the number of retransmissions of the transmitted data is carried out by switching of circuits traceable combining and increasing redundancy schemes which transmit bits parity.

10. Mobile terminal, configured to receive and transmit on multiple component carriers containing
receiving module, configured to receive the transmitted data from the base station;
module channel decoding, made with the possibility of channel decoding of received data�x; and
a processing module, configured to save part or all of the received data in the soft buffer memory of the mobile terminal in accordance with the size of the soft buffer memory if the received data found error,
transmitted data from the base station are transmitted data corresponding to the length of the coded bits obtained by channel coding information bits and performing the process speed negotiation coded bits after channel coding, and the length of coded bits after channel coding is determined by the size of the soft buffer memory of the mobile terminal, configured to transmit and receive on only one component carrier, regardless of the number of component carriers.

11. The mobile terminal according to claim 10, characterized in that, if the received data from the base station found error, the processing module is arranged to drop part of the received data in accordance with the size of the soft buffer memory.

12. The mobile terminal according to claim 11, characterized in that it further comprises a control module, configured to monitor the state of use of the soft buffer memory, and changes the storage area for part or all of the received data in accordance with the state of use�Oia.

13. The mobile terminal according to claim 12, characterized in that the control module is made with the possibility of distribution of the soft buffer memory between multiple component carriers when receiving data transmitted from a base station on multiple component carriers.

14. The mobile terminal according to claim 13, characterized in that the control module is arranged to use soft buffer memory for the received data corresponding to the HARQ process, where found error on the first component carrier, and the received data corresponding to the HARQ process, where found error on the second component carrier.

15. The mobile terminal according to claim 12, characterized in that the control module configured to control operation of the processing module in accordance with a region for storing pieces of data being received.

16. Base station, configured to transmit to the mobile terminal and receiving from the mobile terminal only on one component carrier or multiple component carriers containing
the channel coding module, configured to implement channel coding information bits;
module speed negotiation, made with the possibility of implementation of the reconciliation process speed of coded bits after channel coding; and
transmission module configured to transmit the transmitted data, corresponding to the length of the encoded bits after the speed negotiation in a mobile terminal, in this case,
the base station is arranged to determine the length of the encoded bits after channel coding on the size of the soft buffer memory of the mobile terminal, configured to transmit and receive on only one component carrier, regardless of the number of component carriers.

17. The base station according to claim 16, characterized in that made with the possibility of discarding a certain number of coded bits after channel coding in accordance with the size of the soft buffer memory of the mobile terminal, configured to transmit and receive on a single component carrier.



 

Same patents:

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication and is intended for mobile broadcast management (MBBMS) when transmitting information in data form. The method includes steps where: a source platform sends a stream of synchronous data to a data buffer and determines whether the stream of synchronous data has been successfully sent to the data buffer; if so, the data buffer sends the stream of synchronous data to a target platform; otherwise the source platform sends the stream of synchronous data for storage in data memory. Using the method, apparatus and MBBS for transmitting information in data form, once the data buffer sends the stream of synchronous data unsuccessfully, the data buffer regularly retrieves the stream of synchronous data from the data memory and sends the retrieved stream of synchronous data to the target platform until the retrieved stream of synchronous data is sent successfully; the number of transmissions of synchronous data and the amount of transmitted synchronous data are reduced, thereby saving a large amount of network resources.

EFFECT: high efficiency of transmitting data.

19 cl, 11 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication. Disclosed are steps of: determining a group of downlink subframes to be simultaneously received by each user equipment, where the group of downlink subframes comprises at least two downlink subframes; transmitting one downlink subframe to the user equipment, where transmission of control information of corresponding downlink subframes in the group of downlink subframes to be simultaneously received by the user equipment is carried out in a downlink subframe control unit; and transmitting data to the user equipment in data blocks of corresponding downlink subframes in the group of downlink subframes to be simultaneously received by the user equipment; wherein at least two downlink subframes are scheduled by one downlink subframe.

EFFECT: reduced losses when transmitting control signals, more resources for transmitting data and higher efficiency of the system.

20 cl, 11 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to wireless communication systems. User Equipment (UE) transmits an acknowledgement signal in response to the reception of multiple scheduling assignments (SA) transmitted by a base station. The SA consist of information elements (IE) including a transmission power control (TPC) IE providing adjustment for the transmission power of the acknowledgement signal. The TPC IE in a first SA of the multiple SA is used to provide the previous adjustments and the TPC IE in the remaining of the multiple SA are used to provide an indication of the resource used for transmitting the acknowledgment signal.

EFFECT: efficient determination of rules for allocating resources when transmitting acknowledgement signals to UE.

16 cl, 15 dwg

FIELD: physics, communication.

SUBSTANCE: invention relates to facilities to return ACK/NACK information of aggregation of carriers. A common field is configured, present in DCI, as at least one type of command fields, related to return of ACK/NACK, from at least two types of command fields, related to return of ACK/NACK, where the common field may be configured as command fields related to return of ACK/NACK. The common field is configured in at least one part of DCI, transferred by means of a component carrier downlink connected to the system, as the command field for control of transmission power, TPC, and the common field is configured in at least one part of DCI sent by means of a component carrier downlink not connected to the system, as a command field of ARI for indication of ACK resource. DCI is sent to user equipment, so that the user equipment returns information of ACK/NACK according to DCI.

EFFECT: technical result consists in provision of back compatibility of carrier aggregation.

12 cl, 10 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to wireless commnunications using a forwarder unit between a radio access node (30) and a forwarder node (20). For each assigned subframe of a downlink, to transmit the downlink from the access node to the forwarder node, a subframe of an upperlink is assigned four transmission intervals later. The downlink subframe is set only when an additional subframe of the same interval of transmission from the forwarder node to the user equipment is a subframe of the type that indicates to the user equipment (10) that data is not accepted outside the subframe management area.

EFFECT: improvement of the communication quality.

16 cl, 6 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to a wireless network. When a station receives a downlink HARQ sub-packet having an incorrect cyclic redundancy check, it determines if there is an overflow event of its buffer. If so, the station reduces the size of the HARQ sub-packet to be stored in the buffer and stores the resized HARQ sub-packet in the buffer. When the station transmits an uplink HARQ sub-packet, the station can reduce the size of the transmitted HARQ sub-packet if it exceeds the size of the buffer. The amount of buffer required in the station can also be reduced by representing each log likelihood ratio value of each of multiple bits of each symbol of a HARQ packet with a number of quantisation bits based on a metric sensitivity to noise of each bit of each symbol.

EFFECT: increasing throughput of a HARQ protocol in a wireless communication network.

18 cl, 9 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a wireless systems. The method and apparatus for user equipment (UE) include transmitting HARQ-ACK information over a physical uplink shared channel (PUSCH) in response to reception of at least one transport block (TB), when the UE is configured by a base station with multiple downlink (DL) component carriers (CC), for selecting a single PUSCH for transmitting uplink control information (UCI), when the UE has multiple PUSCH transmissions, and for applying transmission diversity to the HARQ-ACK transmission in a PUSCH.

EFFECT: improved reliability of HARQ-ACK reception when it is encoded using a block code relative to when it is encoded using a repetition code.

10 cl, 13 dwg, 2 tbl

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to means of multiplexing uplink control information (UCI) with data information in a physical uplink shared channel (PUSCH) transmitted over multiple spatial layers. The method includes determination of the number of coded UCI symbols in each spatial layer when the data information is conveyed using multiple transport blocks, determination of the number of coded UCI symbols in each spatial layer when the PUSCH conveys a single transport block retransmission for a hybrid automatic repeat request (HARQ) process while the initial transport block transmission for the same HARQ process was in a PUSCH conveying multiple transport blocks and determination of the modulation scheme for the coded UCI symbols.

EFFECT: simple processing information received in multiple transport blocks.

13 cl, 11 dwg, 1 tbl

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to mobile communication. The invention is intended for transmitting an ACK/NACK signal in a wireless communication system. In some versions, a sequence which corresponds to either acknowledgement (ACK) information or negative acknowledgement (NACK) information can be determined. Further, the sequence can be mapped on a transmission channel for subsequent transmission from a mobile station to a base station. In some versions, a transmission channel may be allocated at least a part of three feedback mini-tiles (FMT), wherein each of the FMT comprises two subcarriers contiguous in frequency domain by six orthogonal frequency division multiplexing (OFDM) symbols contiguous in time domain and the three FMT being discontinuous in frequency domain.

EFFECT: high communication reliability.

9 cl, 12 dwg, 5 tbl

FIELD: physics, communication.

SUBSTANCE: invention relates to communication hardware, particularly, to signalling in response to distribution of UL/DL resources. Planning data receiving method and device defines at least one representation of top-down communication line distribution contained in planning data not received which results in intermittent transmission in to-down line to define transmission of response to receive planning in response to said definition. Other method and device for transmission of planning data and reception of planning data response including intermittent transmission detection that at least one distribution of top-down line of planning data is not received.

EFFECT: higher accuracy of data detection.

29 cl, 13 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a channel state information (CSI) feedback method. A transmitter transmits a frame containing at least part of determined CSI. CSI is fed back in a very-high throughput (VHT) wireless communication system.

EFFECT: high data channel throughput, determining CSI parameters based on information included in a request.

73 cl, 34 dwg, 3 tbl

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to means of transmitting data packets. The method comprises encapsulating a data segment for a higher layer data packet in a lower layer data packet, wherein the higher layer data packet includes logical link control (LLC) protocol data units (PDU) and the lower layer data packet includes radio link control (RLC) data blocks for transmission over an enhanced general packet radio service (EGPRS) network; adding a new packet indicator set to a predetermined value to the lower layer data packet header if the data segment comprises the beginning of a new higher layer data packet to indicate the start of a new higher layer data packet; adding a length indicator to the lower layer data packet header if the data segment comprises the end of a higher layer data packet, wherein adding a new packet indicator includes adding a new packet indicator to a lower layer data packet only when the lower layer data packet begins from the new higher layer data packet segment.

EFFECT: reduced errors when segmenting and merging data packets.

12 cl, 8 dwg

FIELD: radio engineering, communication.

SUBSTANCE: device includes a unit transmission pulse counter, a transmission control unit, a transmission memory unit, a transmission parameter determining unit, a digital transmission system, a unit reception pulse counter, a reception control unit, a reception memory unit, a reception parameter determining unit, a comparator, transmission frame analysis units and a reception frame analysis unit.

EFFECT: high reliability of detecting single and multiple errors in a variable-length Ethernet frame and detecting alternating single and multiple failures in the digital data transmission system under analysis.

3 cl, 4 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to methods of reporting channel quality indicator (CQI) in a wireless communication network. A CQI request may be sent in a first subframe. The CQI may be measured for a second subframe having a first offset from the first subframe, and a corresponding CQI report is sent in a third subframe having a second offset from the first subframe.

EFFECT: reduced use of signalling resources.

30 cl, 2 tbl, 12 dwg

FIELD: radio engineering, communication.

SUBSTANCE: device contains the first, the second and third validity increase units, the first and the second data transmission channels, a repeated request signal output and information output, the first and the second input units, five NOT elements, four AND elements, four keys, and an OR element. The first outputs of validity increase units are informational, and the second ones are the control signal of codogram receiving correctness. The OR element output is the device information output, and the fourth AND element output is the device repeated request output.

EFFECT: channel bandwidth increase due to the lower number of repeated requests owing to better information receiving accuracy.

1 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to a method of correcting parameters when matching data rate based on multilevel mapping. The method includes steps of: obtaining a number of levels for multilevel mapping and determining a transmission mode for communication session content; and correcting parameters when matching the data rate in LTE release 10 protocol in accordance with the obtained number of levels and the determined transmission mode. The present invention also provides an apparatus for correcting parameters when matching data rate based on multilevel mapping, which includes a parameter correction unit, a transmission mode determining unit and a unit for obtaining the number of levels, connected to the parameter correction unit; wherein the transmission mode determining unit can determine the transmission mode for the communication session content and inform the parameter correction unit on the transmission mode; the unit for obtaining the number of levels can obtain the number of levels for multilevel mapping and inform the parameter correction unit on the number of levels; the parameter correction unit corrects parameters when matching data rate.

EFFECT: providing adaptation of parameters when matching data rate on LTE releases 8 and 9 to new mapping types in the LTE release 10 protocol.

10 cl, 2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to radio communication systems. A base station receives signal quality information reports from mobile stations every 480 ms using the slow associated control channel (SACCH) and receives codec mode requests from the mobile stations every 40 ms using adaptive multi-rate (AMR) in-band signalling. The base station associates the requested codec modes with estimated levels of speech quality currently being experienced by the first and second mobile stations.

EFFECT: controlling subchannel transmission power and allocating code modes for a first and a second mobile station based on estimated levels of speech quality associated with requested codec modes, and signal quality reports.

10 cl, 5 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to wireless communication. Certain aspects of the present disclosure relate to a low-overhead method for transmitting channel state information (CSI) feedback in very high throughput (VHT) wireless communication systems. The present disclosure also provides packet formats for null data packet announcement (NDPA), CSI Poll and CSI feedback.

EFFECT: using the disclosed protocol for CSI feedback segmentation in order to transmit media access control (MAC) protocol data unit (MPDU) or a physical layer (PHY) protocol data unit (PPDU).

100 cl, 14 dwg

FIELD: radio, communication.

SUBSTANCE: each flow of data flows set is coded according to appropriate speeds of data transfer, they perform shifts of data flows on the set of MIMO channels according to full shift of combinations, they transfer data flows subjected to shifting, decode and determine SNR for each of data flows, they calculate a summary metric SNR for the set of data flows, they provide a summary metric as a feedback, they determine a set of separate metrics SNR for data flows on the basis of the summary metric SNR, and speeds of data transfer are adjusted, on which data flows are coded, on the basis of separate metrics SNR.

EFFECT: increased efficiency of MIMO wireless communication system due to reduction of a volume of downlink resources, necessary for provision of feedback by efficiency of a channel, for adjustment of data transfer speeds on MIMO channels.

17 cl, 8 dwg

FIELD: radio engineering, communication.

SUBSTANCE: apparatus for demodulating radio signals with smoothly variable radio pulse ascent and descent comprises a transformer with a primary winding W11 and two secondary windings W21 and W22, two reference voltage sources U1 and U2, a pair of parallel-connected capacitor and resistor, threshold elements 1 and 2 and two diodes VD1 and VD2.

EFFECT: high reliability of converting pulsed radio signals with smoothly variable ascent and descent of video pulses of received information discreteness.

2 dwg

FIELD: communications.

SUBSTANCE: device has multiple cascade registers and multiple adders. During receipt of control information series operator forms a series of check connection bits and sends it to adders. After finishing of receipt operator serially adds given input bit to output bits of last register and outputs a result. Source value controller sends to registers a value selected from two source values.

EFFECT: higher efficiency, broader functional capabilities.

8 cl, 7 dwg, 2 tbl

Up!