Energy-efficient methods and network device

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication. A method and device for changing a transmission/reception setting of a base station (BS) in a communication network to another transmission/reception setting (for example, using fewer transmitting antennae and/or a narrower channel bandwidth), without affecting communication with user equipment, includes "replacing" the existing BS with a "virtual" BS having the other transmission/reception setting. Replacement can be carried out, for example, by reducing the power of the existing or the first BS, having the corresponding identification (ID) of a first cell or a first node, and simultaneously increasing the power of the virtual or second BS, having the corresponding ID of a second cell or a second node.

EFFECT: improved BS efficiency.

18 cl, 6 dwg

 

AREA of TECHNOLOGY

This invention relates to electronic communication systems and more specifically to the operation of transmitters and receivers in radio communication systems.

PRIOR art

There is growing interest in reducing power consumption in communication systems, namely the power consumption of base stations in a cellular radiotelephone systems. Reduce the consumption of power from the user system, i.e., from the mobile phones, portable computers and other user equipment (UE), was the result of long-term work, not least because UE is often powered by a battery. The need for improved energy efficiency on the network side, i.e., from the base stations and other network nodes, mainly supported by the network operator costs to the transmission of unnecessary signals in the case of low network load.

Communications systems that have "unwanted" signals, among other things, are systems that conform to the telecommunications standards HSPA (high speed packet access) and LTE (long-term development project). Systems HSPA and LTE, which may include HSPA, sometimes referred to as cellular systems 3G ("third generation") and is currently standardized by 3GPP (partnership project t�Atego generation). Specifications LTE can be considered as the development of specifications WCDMA (wideband multiple access code division). Advanced communication system IMT (i.e., communication system 4G ("fourth generation") uses multimedia subsystem (IMS) with an Internet Protocol (IP) LTE, HSPA, or other communication system for multimedia telephony IMS (IMT). 3GPP publishes specifications LTE, HSPA, WCDMA and IMT and specifications that standardize other types of cellular wireless communication systems.

In the system of LTE evolved node B (eNB) or base station (BS) can be configured for channels downlink (DL), which have a bandwidth in the range of from about 1.4 megahertz (MHz) to 20 MHz for communication with the UE. Such channels are supported pilot signals that have standardized templates corresponding to the bandwidth of the channel, and the channels with a narrower bandwidth require the transmission of a smaller number of pilot signals than channels with wider bandwidth. For the eNB may set the channel bandwidth to 20 MHz in those moments of time when this bandwidth is not needed, for example because there is no sufficient requests from the UE for data transmissions. Thus, despite the fact that not all resource blocks (RB) DL populated with data, is transmitted standardized, but �Eugeny pattern of the pilot signal, which leads to loss of power at the eNB and UE persistently performs the transmission of unnecessary indicators of channel quality (CQI) for a large number of unused blocks, wasting energy in UE.

In the HSPA system BS can be configured to explode transmit (TX) and so to have two active transmitter with the corresponding templates pilot signals that are set for dual stream transmission HSPA MIMO (communication system with many inputs and many outputs). However, such work may be unnecessary due to the fact that in a neighborhood of BS may not be a UE operating with MIMO. Nearby may even not be a UE that can receive a scheme with diversity TX and/or UE that are nearby may not request a lot of data downlink at this point. Thus, the BS configured to explode TX, spends energy transmitting unnecessary pilot signals using the second transmitter, when it is configured for high speed data transmission, whereas such high speeds of data transmission are not used. In addition, UE in a neighborhood of BS with diversity TX may have fewer opportunities or may have difficulty in processing the pilot signals with diversity TX properly, therefore, the UE can save power from the battery to the processing of more complex pilot signals with diversity TX and/or can experience pony�enny system performance.

Fig.1 shows a typical cellular radio communications system 10. The controllers 12, 14 of the radio network (RNC) control various functions of the radio network, including, for example, configuring unidirectional channel radio access, transmission service with diversity, etc. In General, each RNC directs calls to and from a UE, such as mobile station (MS), a mobile phone or another remote terminal through a corresponding base station (BS) that communicate with each other through channels DL (or straight line) and UL (upward or return line). Fig.1 RNC 12 is shown connected to BS 16, 18, 20 and RNC 14 is shown connected to BS 22, 24, 26.

Each BS or eNB in the LTE system serves a geographic area that is divided into one or more cells. Fig.1 BS 26 is shown as having five sectors S1-S5 with antennas, which, if you will, form the honeycomb BS 26, although the sector or other area served by the signals from the BS may also be called a cell. As described above, the BS may use more than one antenna for transmitting signals to the UE. BS typically are connected with their respective RNC using dedicated telephone lines, fiber optic lines, lines, microwave links, etc. RNC 12, 14 are connected with external networks, e.g. the public switched telephone network (PSTN), the Internet, etc. using one whether�about more nodes of the core network, for example center mobile switching (not shown) and/or service node packet radio (not shown).

It should be understood that the structure of the functional blocks shown in Fig.1 may be modified in LTE and other communication systems. For example, functional blocks RNC 12, 14 can move to the eNB 22, 24, 26, which is typical in the LTE system, and other functional blocks can move to other nodes in the network. For example, according to SAE (system architecture), standardised 3GPP eNB 22, 24, 26 communicate with the rotary node in SAE core network through the S1 interface through the gateway of the eNB and SAE that contains the user plane SAE architecture.

The physical layer of LTE, including PDSCH (physical shared channel downlink) and other channels of LTE as described in the technical specifications (TS) 3GPP 36.211 V8.7.0, physical channels and modulation (Physical Channels and Modulation) (release 8) (June 2009), among other specifications. The LTE communication system described in the literature, for example, in the publication of the patent application (USA) No. US 2008/0031368 A1 author B. Lindoff, etc. For measurements of cell, channel estimation and other purposes of the pilot signals or reference symbols or signals (RS) transmitted from each eNB at a known frequency and known points in time. RS described, for example, in sections 6.10 and 6.11 of 3GPP TS 36.211 and transmitted from each possible transmitting antenna 1, 2 or 4 �evil eNB-specific resource elements (RE). Comparable specifications and literature are available for WCDMA and other communication systems.

Fig.2 shows the arrangement of subcarriers in a RB in two consecutive time slots, which can be called podagra in the LTE system. Like many digital communication systems LTE and HSPA organized in frames, and the frame length LTE is twenty slots. The frequency range shown in Fig.2, includes twenty-seven subcarriers, only nine of which are clearly marked. Fig.2 each of RB, which is indicated by means of dotted lines, includes twelve subcarriers, spaced at fifteen kilohertz (kHz), which together occupy 180 kHz in frequency and 0.5 MS in time, or a single time slot. Fig.2 shows in scale from the condition that it shows each time slot includes seven symbols or RE, each of which has a short (normal) cyclic prefix, although six OFDM symbols having a long (extended) cyclic prefixes may be used instead of them in the time slot. It will be understood that RB may include a different number of subcarriers for different time periods.

RS transmitted from the first TX antenna node eNB denoted by R and using a second TX antenna at the node labeled with S. RS is transmitted on every sixth subcarrier in OFDM symbol 0 and OFDM symbol 4 (as �emboli have a short cyclic prefixes) in each slot. Also in Fig.2 RS in characters 4 shifted by three subcarriers relative to RS in the OFDM symbol 0, the first OFDM symbol in the slot.

In addition to the reference signals of predetermined timing signals provided to the cell search procedure, which carries the UE for access to the system or network. The cell search procedure involves the synchronization of a UE receiver according to the frequency, the temporal alignment of symbols and temporal coordination of frames transmitted signal of a cell and determining the ID of the physical layer cell. The cell search procedure for the LTE system is described, for example, in section 4.1 of 3GPP TS 36.213 V8.6.0, E-UTRA (enhanced universal terrestrial radio access), Physical Layer Procedures (procedures physical layer) (release 8), June 2009. LTE uses a hierarchical search scheme honeycomb, similar to WCDMA, in which the receipt of the synchronization eNB-UE and identification of the group of cells derived from the different signals of the synchronization channel (SCH). The signal of the primary synchronization (PSS) and the signal secondary synchronization (SSS) is set by using pre-defined patterns in section 6.11 of 3GPP TS 36.211.

Fig.2 shows SSS and PSS as OFDM symbols 5, 6 (assuming the work with a short cyclic prefix and full-duplex transmission with frequency division (FDD). Current LTE systems have symbols PSS and SSS transmitted in the middle of the six RB (i.e. in the middle of the seventy-two subcarriers) in large�of Drach 0 and 5. In General, the UE uses the PSS synchronization slots and SSS synchronization frames in the LTE system. Comparable reference channels and synchronization channels are often provided in other digital communication networks, although they may be named differently.

As discussed above, the BS may have a configuration of transmission/reception, which is not needed at the moment, and it is therefore desirable to improve the efficiency of BS.

Summary of the INVENTION

According to the aspects and modalities of implementation of this invention, there is provided a method of operating a node for a communication system. The method includes the operation of the node by using a first set of transmit/receive (TX/RX) using the first cell or by using a node identification (ID), tracking the load on the node, determining moved if the load threshold value, and if the load has crossed a threshold, a gradual transfer of site to work with the second configuration TX/RX with the second cell or node ID. The second setting TX/RX in the first configuration TX/RX includes at least one of: smaller antennas, less bandwidth and less composite carrier or subcarrier.

In addition, according to the aspects and modalities of implementation of this invention, there is provided an apparatus for a node for a communication system. The device includes a scheduler and selector configured DL� hosting information which must be passed through the node; a signal generator configured to generate a signal corresponding to the information for transmission to the node via at least one antenna, wherein the signal includes the identification of the first node (or cell) or the identification of the second node (or cell); and a control processor configured to monitor the load transmission to the node, and, on the basis of passed if the load threshold value, for gradual transition of a node from the work with the first setting TX/RX with the first node ID to the node via a second setting TX/RX with the second node ID. The second setting TX/RX in the first configuration TX/RX includes at least one of: smaller antennas, less bandwidth and less composite carrier or subcarrier.

In addition, according to aspects and embodiments of the implementation of this invention, there is provided a computer-readable storage medium that has stored commands that, when execution by the computer cause the computer to perform a method of operating a node in the communication system. The method includes the node with the first setting of transmit/receive TX/RX with the identification of the first node (ID); monitoring the load on the node; determining, moved if the load threshold value, and if the load per�was the threshold value, gradual transfer of the site to work with the second setting TX/RX with the second node ID. The second setting TX/RX in the first configuration TX/RX includes at least one of: smaller antennas, less bandwidth and less composite carrier or subcarrier.

BRIEF description of the DRAWINGS

Several features, advantages and objects of this invention will be understood upon reading this description in connection with the drawings, in which:

Fig.1 shows a cellular radio system;

Fig.2 shows the supporting characters, the primary synchronization and secondary characters synchronization in a communication system that uses multiple access orthogonal frequency division).

Fig.3 is a block diagram of the sequence of operations of a method of operating a node, e.g. a base station in the communication network;

Fig.4 illustrates the offset time harmonization of podkatov transferred to the base station using the identification of the first and second honeycomb;

Fig.5 is a block diagram of a base station, which may implement the methods described in this application; and

Fig.6 is a block diagram of user equipment for a communication system.

DETAILED DESCRIPTION

This description concentrates on the LTE communication system to an effective explanation, but the specialist will understand that the invention in General �can be implemented in other digital communication systems.

In comparison with examples HSPA LTE described above, other settings to send/receive a BS, such as a mode with a single TX antenna and a smaller bandwidth, require less power at the BS and, for example, less processing of the signal may require less power in the UE. However, changing the setting of transmission/reception, the BS may not be allowed due to restrictions in some specifications of the system, and even if so, the mechanisms for easy change settings BS does not always exist. Thus, the BS can continue to work inefficiently. In addition, there may be no way to inform the affected UE changing the setting, BS, and even if this happens, the UE may not attach value to such information. Thus, the UE can continue to work inefficiently (or, even worse, mistakenly, as if there was no configuration changes are BS.

The inventors found that it is desirable to fix the lack of a standardized mechanism for signaling from the BS to the UE, so that will be a change in the configuration of the transmission/reception BS, such as a change in bandwidth, reducing the number of active TX antennas, etc. is Also desirable to have a mechanism to change modes/settings for transmission/reception of the BS that is compatible with the current standards and hence do not impact negatively on existing UE.

Inventors you�wheelie, what the current setup is receiving/transmitting BS can be changed to another desired setting transmission/reception (e.g., using fewer transmitting antennas and/or lower bandwidth channels) without affecting communication with a UE in a neighborhood BS, "replacing" an existing BS on the "virtual" BS that has appropriate settings for transmission/reception. The substitution may be effected by reducing the capacity of the existing or the first BS, which has a corresponding identification (ID) of the first cell or the first node, and simultaneously increase the power of the virtual or the second BS, which has a corresponding identification of the second cell or the second node. In this embodiment, one physical implementation of the BS can simultaneously be displayed as two BS with two cell ID. UE, which is fixed or connected to the existing BS, may gradually switched from the existing BS (i.e., ID of the first cell) to the virtual BS (i.e., ID of the second cell). The transmitted power of the existing BS with the first configuration and cell ID can then be set to zero, and any connection with the UE can continue using the ID of the second cell and the second configuration.

If hardware or software BS may not allow BS to appear simultaneously as two BS with two cell ID (despite apparently low load of BS), the transmission power of �current BS may just be completely reduced to as the power of "virtual" BS will be included or sharply or gradually increased to full power. In order to avoid problems with loss of connection and other problems with this alternative procedure, it is preferable that coverage was available and the free capacity of at least a third BS. Such third BS should have the signal level at the UE, which is almost as good as the level of signal from the first BS and probably geographically close to the first BS.

Numerous cell ID that BS can be assigned to a BS by any known method. ID honeycombs are typically assigned in advance to the BS in the network to minimize interference and confusion between BS. For example, the LTE communication system is available IDs 504 physical layer cell, as specified, for example, in paragraph 6.11 of 3GPP TS 36.211 V8.9.0, Physical Channels and Modulation (physical channels and modulation) (release 8) (December 2009). Many methods of network planning, including the appointment ID of a cell, known in the art.

Fast and efficient cell search and measurement of a received signal are important for the UE to connect and stay connected with the corresponding cell. In General, the cell search is the procedure by which the UE receives the synchronization in time and frequency with the cell and detects the ID of that cell. The cell search based on the signals of the primary and secondary synchronization NIS�Odesa lines of communication and reference signals downlink.

When UE is in active mode, it is connected to at least one hundredth of that could be called "serving cell". When UE is in idle mode, UE "fixed" in a cell in order to listen to the paging message addressed to it. In both modes, the UE performs a cell search on a regular basis to detect new candidates serving cell (active mode) or new cells to consolidate (standby). New honeycomb can be on the same frequency as the current cell or on a different frequency. Search cell in the active mode UE is set, for example, in paragraph 4 of 3GPP TS 36.213 V8.8.0, physical layer procedures (release 8) (September 2009) and paragraph 5.1 of 3GPP TS 36.214 V8.7.0, Physical Layer Procedures (procedures physical layer) (release 8) (September 2009). The cell search UE in idle mode is set, for example, in section 5.2 of 3GPP TS 36.304 V8.4.0, procedure user equipment (UE) in idle mode (release 8)(December 2008).

Fig.3 is a block diagram of the sequence of operations of a method of operating a node, e.g. BS or eNB, according to this invention. In step 302, the first BS using the first configuration of transmission/reception (TX/RX) with the first cell ID. In this state, may be one or more UE with an active connection with a first BS, or which are assigned to the first BS (i.e. the UE is located in the standby mode).

In step 30 is monitored load on the first BS, for example, using the appropriate traffic analyzer. As the load on the cell is within an interval corresponding to the current setting of transmission/reception, the first BS continues to work with the first setting transmitting/receiving. In General, the load on the first BS may be monitored by determining the total number of RB assigned codes or sewage, depending on the type of the communication system. RB and RE in General relate to LTE and systems, equivalent to OFDM, codes and sanitation generally refers to WCDMA, HSPA and equivalent systems, in which each UE is assigned a corresponding code sanitation. Load of BS may also be monitored by determining the buffer state BS, for example, how much data is waiting available bandwidth for transmission to all connected UE in the ratio of RB and RE, or how many sanitation codes transmitted at the moment and recently passed. Load of BS can be tracked by determining the number of connected UE.

In step 306 is determined, moved if the load cell threshold value, and, thus, should be a different, second set of transmission/reception. The second configuration may include, for example, less or more TX antennas, smaller or larger bandwidth of the system, less or more composite carrier or subcarrier, and so�. For example, consider that in the LTE system, a suitable threshold value is in the range from 5% to about 20% of the maximum number of assigned RB, and the threshold value may change with hysteresis so that, for example, the threshold is 5% for switch settings transmission/reception from the larger tank to the smaller capacity and is equal to 20% to switch the settings to send/receive from lower capacity to higher capacity.

If it is determined that the load on the cell has passed a threshold value ("Yes" in step 306), the second BS gradually increases the transmission power of the pilot signal, the sync signal and other signals, while the first BS gradually reduces the transmission power of their pilot signals and the synchronization signals and possibly other signals (step 308). If it is determined that the load cell has not passed the threshold ("no" in step 306), the process flow returns to step 304.

As a result of step 308 active UE and UE in idle mode start to make their search procedure SOT, find the second BS and eventually initiate the transfer of service from the first BS to the second BS when the pilot signals and the synchronization signals of the second BS is much stronger than the signals from the first BS (step 310). During the process of switching from the first to the second BS is possible that UE briefly switches to a third BS, which is almost as "�the '" from the point of view of the signal as the first and the second BS, as long as the power of the second BS does not become sufficiently high. First BS handles requests for switching the UE and the UE switches to the second BS, applied using the procedure defined for the communication system.

In addition to switching first UE BS mostly waits until the period of time before completely disconnect the power supply (step 312). Suitable period of time that is sufficient to ensure that the UE in idle mode has performed cell reselection, and typically is determined by the requirements to re-select cell in applied communications system specs. The time interval of the order of 10-60 seconds is now considered suitable for communication systems, like LTE, in which cell reselection UE in idle mode takes about ten seconds, and currently expect that the BS can change your setting transmission/reception data transmission speed several times an hour or so approximately. The time interval can be measured by a suitable timer, implemented in the first BS. First BS then reduces the power, and the relationship continues with the second BS, working with the second setting TX/RX and UE (step 314).

At optional step 316, indicated by the dotted lines, the first BS in LTE or equivalent communication system adds Odie� or more scattered podkatov, which can be used for transmission of the second BS, instead of increasing the capacity of the second BS and reduce the capacity of the first BS (step 308). Available podckaji are polkadraai that do not transmit user data, but they can still contain control and strong characters (and possibly also the PSS/SSS) in the example LTE system. Currently considered sufficient to carry out either step 308 or step 316, but it should be understood that the method may include the step 308 and step 316.

In order to create space for added DL-podkatov, the first BS may, for example, to displace a temporary agreement between polkadraai respectively transmitted to the first and second BS by a certain amount of conditions, the pilot signals, synchronization signals and control signals from the first and second BS was not transferred at one time. In addition to the exclusion of the conflict of signals in time offset time harmonization DL-podkatov from the first and second BS may be necessary due to hardware limitations BS at its maximum transmit power. The specialist will understand that some BS is limited to a maximum transmitter power of twenty watts.

Fig.4 illustrates an example of LTE with an appropriate offset time harmonization of podkatov, transmitted by the BS using cell ID 1 and cell ID 2. This drawing shows a good head�renie of podkatov and slot ID for each cell, which includes RS as described above, and managing traditional physical channel downlink (PDCCH) which carries UE-specific control information. PDCCH contains the RE in the upper part of the first three OFDM symbols in the first interval podagra, and Fig.4 shows the displacement time harmonization, as these three characters. However, it will be understood that other offsets are appropriate. Additionally, it will be understood that after the UE is switched from cell ID 1 cell ID 2, the UE adjusts its UL-temporary approval for UL-temporary approval of a cell with ID 2, which is based on DL-temporal coordination of cell with ID 2 in accordance with the procedures specified for the communication system.

As described above, the setting TX/RX BS includes at least one of: the number of TX and/or receiving antennas used for communication, the system bandwidth (for LTE, 1.4-20 MHz), the number of aggregated carriers (for LTE and LTE advanced), etc. For the system of the LTE BS corrects the system bandwidth by adjusting the number of RB or RE, which is used for connection with the corresponding UE. (Specialist remember that LTE UL uses SC-FDMA (multiple access frequency division with a single carrier), which is mainly based on pre-coded OFDM.) In the "carrier aggregation for bandwidth, bol�necks than 20 MHz, together components are aggregated from many carriers, each of which may be of a width to 20 MHz. Then the UE receives the multicast load-bearing, composite bearing, having at least the possibility of having the same structure as that of the conventional LTE carrier. Carriers can be aggregated from nearby or may be aggregated from discrete parts of the frequency spectrum.

Although eNB may implement the methods described above, for myself, will be taken into account that the eNB or other network node may be configured to coordinate the ways using one or more eNB. For example, the BS may monitor the load and send the appropriate reports on the burden to another BS, RNC, gateway, SAE, etc., which is configured to determine whether the threshold has been crossed off the load, and then to command the transmitting BS to create a "virtual" BS. This may be advantageous in that the node of higher level, like the RNC or the SAE gateway may be in a position to know the load and the provisions of other BS in the network and for the location of the UE to switch to a virtual BS either directly or through appropriate third BS. It's also possible to avoid the "chaos" of shifting with too many BS that does the translation settings in approximately the same time.

Using variants is carried out�of tvline of this invention BS or eNB may change their mode of transport to more efficient power transmission (for example, to change from many TX antennas to only one TX antenna and/or wider bandwidth to a lower bandwidth) in the case of low load in a manner that will not damage the existing UE and will not affect the specifications of the existing system.

Fig.5 is a block diagram of a part of the eNB 500, which is typical BS 16, 18, 20, 22, 24, 26 and other such transmitting nodes in the network 10 that may communicate with the UE by implementing the methods described above. Will be taken into account that the functional blocks shown in Fig.5, can be combined and reordered a variety of equivalent ways, and that many of the functions can be implemented by one or more suitably programmed digital signal processors and other known electronic circuits.

eNB 500 is under the control of the control processor 502, which is typically and mostly appropriately programmed digital signal processor. Control processor 502 typically provides and receives control and other signals from various devices in the eNB 500. For simplicity in Fig.5 control processor 502 is shown to communicate with the scheduler and selector 504, which receives digital words which are necessary� to the respective UE, or to stream from a suitable generator 506 data. The scheduler and selector 504 implements the planning RB/RE and choice, for example, in the LTE system, and implements the intent of the code, for example, in the system of the WCDMA/HSPA network.

Control processor 502 is configured to monitor the load on the eNB, which may be determined, for example, a simple account of RB and RE, which must be passed in potcake, frame or group of them. A processor, such as control processor 502 may also be configured as a traffic analyzer that determines the load on BS, tracking the status of the buffer BS, for example, how much data is awaiting transfer to the available bandwidth to all connected UE of the number of RB and RE is transmitted at the moment and recently passed. As discussed above, the load on the BS may also be determined based on the number of all connected UE or WCDMA, HSPA or equivalent system based on the number of assigned codes sewers. On the basis of a certain load, the processor 502 implements other steps of the methods described above.

Information from the scheduler and selector 504 is provided in the modulator 508, which uses the information to provide a modulation signal, a suitable specific communication system. For example, modulation 508 in the LTE system is an OFDM modulator. The modulation signal generated by the modulator 508, �offered in a suitable circuit 510 radio, which generates a wireless signal that is transmitted through at least one transmitting antenna 512. Wireless signals transmitted UE, are captured by at least one receiving antenna 514, which provides these radio signals 510 and the demodulator 516. The specialist will understand that the same antenna can be used for transmission and reception, as is often performed in UE.

It will be understood that the control processor 502 can be configured from the condition that it included one or more devices shown in Fig.5, which can be implemented using specialized programmable processors or by using other suitable logic configured to implement their functions. Combining generator 506 data, scheduler and selector modulator 504 and 508 produces DL-frames or podckaji that need to be transferred. Modulator 508 converts the information into modulation symbols, which is provided to radio 510, which imposes the modulation symbols for one or more suitable carrier signals. In the LTE system, for example, radio 510 imposes the modulation symbols on multiple OFDM subcarriers. The modulated subcarrier signals are transmitted via antenna 512.

Fig. 6 is a block diagram of part of the UE 600, which is suitable to receive signals from the eNB, as described in this applied�I. Part of the radio signals, transmitted by the eNB, receives via one or more antennas 602 and transmitted in the RF path to the receiver (FE RX) 604, which typically converts the received radio signal with decreasing frequency to an analog baseband signal. The baseband signal is processed spectral shaping using a suitable digital filter 606 (DF), which has a width BW1 of bandwidth, which corresponds to the bandwidth of the pilot signal and the synchronization signals (e.g., OFDM symbols in the LTE system) included in a transmitted/received signal. Treated with the shaping of the modulating signal generated by the filter 606 may be temporarily stored in the buffer data 608, which provides the stored signal in block 610, the detection of the PSS and in block 612 SSS detection. Blocks 610, 612 detection is carried out one or more ways to find SOT, as specified for the particular communication system, such as LTE, which typically includes detection of a predetermined PSS and SSS in a received signal. Blocks 610, 612 discovery pass their results using appropriate signals to the control unit 614, which also controls the operation of the FE RX 604, DF blocks 606 and 610, 612 of detection. Control block 614 tracks information needed for configuring the filter block 606 and 610, 612 of detection. Communication between blocks 610, 612 �the detection and control unit 614 may include, for example, cell ID.

Block 610 PSS detection may include any suitable type of correlator which is mapped to the representation in the time domain PSS, SSS or equivalent synchronization signal, the receiver includes a matched filter that has impulse response, which corresponds to a mirror (backwards in time) the complex conjugation of PSS. It will be understood that such matched filters can be implemented in hardware devices such as delay lines with taps, correlators, which compare the incoming sequence with the expected sequence, and equivalent devices or appropriately programmed or configured electronic processor. For example, patent No. 7003022 (USA), Urabe and others, describes the matched filter and receivers for mobile radio communication systems. The control unit 614 is suitably configured to compare the real parts of the amplitudes of the output signals of all agreed filters in block 610 and selects the filter that has the highest correlation peak according to the method of cell search that is specified for the communication system.

Buffer 608 data allows for "offline" searches using samples of the received signal stored in the buffer. It allows to disable FE RX 604 for Econ�MIA's energy. Alternatively, the received signal may pass directly from the filter 606, the detector 610 PSS.

Will be taken into account that the detector 612 SSS can calculate the channel estimation symbol based PSS detected by the detection unit PSS, and may use channel estimation for equalization of the channel to the detection of coherent SSS. Methods of channel estimation are well known in the art and described, for example, in the publication of patent application No. 2005/0105647 (USA) Wilhelmsson, etc. for "Channel Estimation by Adaptive Interpolation". Channel estimation are not mandatory, however, as the SSS detection unit may perform non-coherent detection of SSS.

Will be taken into account that the procedures described above are carried out repeatedly as required, for example, to respond to time-varying nature of communication channels between transmitters and receivers. To facilitate understanding, many aspects of this invention are described in terms of sequences of actions that can be performed by using, for example, a properly configured system elements with programmable computer. It is clear that different actions can be implemented using appropriately configured specialized circuits (e.g., discrete logic gates, coupled to osushestvlenie� specialized function, or specialized integrated circuits), by program instructions executed by one or more processors, or a combination of both.

Moreover, this invention can additionally be considered to fully implement any form of machine-readable data carrier on which there is a corresponding stored set of commands for use by the system or in combination with the system commands, device or apparatus, such as system-based computer system containing a processor, or other system that can cause the command from the data carrier and to execute commands. As used in this document, a "computer readable medium" can be any means that can contain, store, or transmit a program for use by the system or in combination with the system commands, device or apparatus. The machine-readable storage medium may be, for example, but not limited to, electronic, magnetic, optical, electromagnetic, infrared or semiconductor system, device or equipment. More specific examples (a non-exhaustive list) of the computer readable storage medium include an electrical connection having one or more wires, floppy disks, computers, random access memory device�tvo (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash memory), and optical fiber.

Thus, the invention can be implemented in many different forms, not all of which are described above, and all such forms are considered as being within the scope of the invention. For each of the various aspects of the invention, any such form may be referred to as "logic configured to" perform the action or alternatively as "logic that" performs a described action.

It should be emphasized that the term "contain" and "contains" when used in this description is used to specify the presence of stated features, integers, steps or components, and does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof.

The specific implementation options described above are merely illustrative and should not be considered limited in any way. The scope of the invention is defined by the following claims.

1. A method of operating a node for a communication system, comprising stages on which:
exploiting the said node in accordance with the first setting transmitting/receiving (TX/RX) with identification information of the first I�La for at least one cell,
monitor the load at the node;
determine moved if the load threshold value; and
if the load has crossed the threshold that gradually converted the said node from operation according to the first configuration of transmission/reception (TX/RX) with identification information of the first node to work according to the second configuration TX/RX with identification information of the second node to the at least one cell;
this gradual transfer includes adding at least one free podagra used for signal transmission through the mentioned node operating according to the second configuration TX/RX, podkatom used by the node operating according to the first setting TX/RX,
mentioned this host is running at the same time as two different nodes with said identification information of the first and second node, respectively, during the gradual transition, and
the second setting TX/RX different from the first configuration TX/RX that includes a different number of antennas, in that it has a larger or a smaller bandwidth and/or different number of component carriers or subcarriers.

2. A method according to claim 1, wherein the gradual translation contains the stage at which increase the transmission power of the signal transmitted by node according to the second configuration TX/RX, along with the fact that h�about reduce the transmission power of the signal, passed referred to by the node according to the first setting TX/RX.

3. A method according to claim 2, additionally containing a stage, where the expected expiration of the time period, and then cease transmission of the signal according to the first setting TX/RX.

4. A method according to claim 1, wherein adding at least one free podagra contains the stage at which displace a temporary agreement between polkadraai transmitted by the node according to the first and second settings TX/RX, respectively.

5. A method according to claim 1, wherein monitoring the load contains the stage at which monitor at least one of: total number of resource blocks or codes forming channels assigned for transmission mentioned by the node, the state of the buffer of the node and the number of units of user equipment connected with the node.

6. A method according to claim 5, in which the threshold value corresponds to part of the maximum number of assigned resource blocks or codes of channel formation.

7. The device node for a communication system, comprising: a scheduler and a selector configured to receive
the information that you need to pass node;
a signal generator configured to generate a signal corresponding to said information for transmission to the mentioned node via at least one antenna, wherein the signal includes at �you identification information of the first node to at least one cell or only the identification information of the second node; and
a control processor configured with the ability to track the load transfer at the said node and when the load has passed a threshold value, with the possibility of a gradual transfer of the site from the operation according to the first configuration of transmission/reception (TX/RX) with identification information of the first node to the node according to the second configuration TX/RX with the ID of the second node;
this gradual transfer includes adding at least one free podagra used for signal transmission through the mentioned node operating according to the second configuration TX/RX, podkatom used by the node operating according to the first setting TX/RX,
mentioned this host is running at the same time as two different nodes with said identification information of the first and second node, respectively, during the gradual transition, and
the second setting TX/RX different from the first configuration TX/RX that includes a different number of antennas, in that it has a larger or a smaller bandwidth and/or different number of component carriers or subcarriers.

8. The device according to claim 7, in which the control processor is configured to gradually transfer node, increasing the transmission power of the signal transmitted by node according to the second configuration TX/RX, at the same time reducing the power PE�of Adachi signal, transmitted by the node according to the first setting TX/RX.

9. The device according to claim 8 in which the control processor is further configured to wait until a period of time and then stop transmission signal in accordance with the first setting TX/RX.

10. The device according to claim 7, wherein the adding at least one free podagra contains the stage at which displace a temporary agreement between polkadraai transmitted by the node in accordance with the first and second settings TX/RX, respectively.

11. The device according to claim 7, in which the control processor is configured to monitor the load by tracking at least one of: total number of resource blocks or codes forming the channel assigned for transmission mentioned by the node, status of the buffer mentioned node and the number of units of user equipment connected to the node.

12. The device according to claim 11, in which the threshold value corresponds to part of the maximum number of assigned resource blocks or codes of channel formation.

13. Machine-readable data storage medium that has stored commands that, when executed by a computer cause the computer to perform a method of operating a node in a communication system containing:
the operation of the node according to the first configuration of transmission/reception (TX/RX) with identificationsupermodel first node to at least one cell,
monitoring the load on the node;
definition of moved if the load threshold value; and
if the load has crossed a threshold, a gradual transfer of this node out of operation according to the first configuration of transmission/reception (TX/RX) with identification information of the first node to work according to the second configuration TX/RX with identification information of the second node to the at least one cell;
this gradual transfer includes adding at least one free podagra used for signal transmission through the mentioned node operating according to the second configuration TX/RX, podkatom used by the node operating according to the first setting TX/RX,
mentioned this host is running at the same time as two different nodes with said identification information of the first and second node, respectively, during the gradual transition, and
the second setting TX/RX different from the first configuration TX/RX that includes a different number of antennas, in that it has a larger or a smaller bandwidth and/or different number of component carriers or subcarriers.

14. The carrier according to claim 13, in which the gradual translation includes increasing the transmission power of the signal transmitted by the node according to the second configuration TX/RX, at the same time reducing the power p�of transmission of the signal transmitted by the node according to the first setting TX/RX.

15. The carrier according to claim 14, further comprising waiting, when will expire period of time, and then the cessation of signal transmission according to the first setting TX/RX.

16. The carrier according to claim 13, wherein the adding at least one free podagra contains the offset of the interim agreement between polkadraai transmitted by the node in accordance with the first and second settings TX/RX, respectively.

17. The carrier according to claim 13, in which the load tracking includes tracking at least one of: total number of resource blocks or codes forming channel designated for transmission to a node, the status of the buffer of the node and the number of units of user equipment connected to the node.

18. The carrier according to claim 17, in which the threshold value corresponds to part of the maximum number of assigned resource blocks or codes of channel formation.



 

Same patents:

FIELD: radio engineering, communication.

SUBSTANCE: result is achieved by dividing a geographical area into a plurality of geographical bins, setting up a plurality of zones for a cell based on a plurality of boundary thresholds, receiving a plurality of signal measurements from a plurality of user devices across the geographical bins, classifying the geographical bins into the different zones by comparing the signal measurements to the boundary thresholds of the zones, calculating a plurality of gain adjustments for the corresponding geographical bins in the zones and generating a beam pattern based on the gain adjustments.

EFFECT: optimising the antenna beam pattern of a base station.

23 cl, 10 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to data transmission. The method enables a femtocell access point to automatically establish communication with a communication network provider; enable said access point to automatically download a personal configuration from an initialisation server belonging to said communication network provider and a domain name system server is automatically used to obtain the address of the initialisation server.

EFFECT: improved femtocell initialisation method.

19 cl, 4 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention discloses, in particular, a method of detecting a preamble, which includes the following: chips of a preamble are divided into a plurality of chip blocks, and correlative accumulation is performed on the plurality of chip blocks to obtain multiple groups of partial products of signature components; compensation of positive frequency offset is performed on each group of the multiple groups of partial products of signature components to obtain multiple groups of compensation results of positive frequency offset, and compensation of negative frequency offset is performed on each group of the multiple groups of partial products of signature components to obtain multiple groups of compensation results of negative frequency offset; coherent accumulation, phase rotation, signature matching and complex modulus calculation, and dual-antenna merging are performed on the multiple groups of compensation results of positive frequency offset, and the coherent accumulation, the phase rotation, the signature matching and the complex modulus calculation, and the dual-antenna merging are performed on the multiple groups of compensation results of negative frequency offset.

EFFECT: high efficiency of detecting preamble in a wideband code division multiple access system.

14 cl, 4 dwg

FIELD: radio engineering, communication.

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EFFECT: enabling identification of devices with referencing to the geographic location in local zones.

7 cl

FIELD: radio engineering, communication.

SUBSTANCE: direct communication is facilitated using a network-connected server device, which provides a common platform for a plurality of requesting devices in order to request a plurality of target devices with any initiation means based on a plurality of service attributes. The network-connected server device has an auxiliary function - making the system compatible with all initiation means, but in which the system is absent during service level communication in the devices.

EFFECT: improved system.

19 cl, 2 dwg

FIELD: radio engineering, communication.

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EFFECT: invention enables a terminal device to prevent degradation of reception quality of control information even when employing SU-MIMO transmission system.

12 cl, 10 dwg

FIELD: physics, communications.

SUBSTANCE: invention relates to radio communication. A base station performs radio data communication with terminal devices by using a plurality of bands of which each has a data channel region to which a data channel is assigned and a control channel region to which a control channel is assigned. The base station includes a control channel assigning device which assigns a control channel for the terminal device at a location in the control channel region of any band from a plurality of bands corresponding to a band to which a data channel assigned to the terminal device belongs, and a control channel transmitting device which transmits the control channel to the terminal device at the location assigned by the control channel assigning device.

EFFECT: improved efficiency of using system frequency as a whole.

2 cl, 21 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to mobile communication. The mobile communication method includes a step of determining, by a mobile management node MME, whether a mobile station UE is a roaming mobile station UE, in an attach procedure of a mobile station UE or a transition procedure to an active state; and a step of transmitting, by the mobile management node MME, to a radio base station eNB, user consent indication indicating whether the mobile station UE has given consent for implementation of MDT when it is determined that the mobile station UE is roaming.

EFFECT: performing management such that an instruction to perform minimisation of drive tests (MDT) is not transmitted to a roaming mobile station UE.

6 cl, 6 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to frequency adjustment in wireless communication. Terminal performance information related to performance of a wireless terminal device, in which at least one of a first frequency bandwidth for use in an uplink or a second frequency bandwidth for use in a downlink is variable, is associated with a terminal category beforehand. When the terminal performance information is received from the wireless terminal device, the terminal category is specified from the terminal performance information, line setting with the wireless terminal device is carried out and a control signal corresponding to the line setting is transmitted.

EFFECT: simple line setting based on terminal category and faster frequency setting.

7 cl, 19 dwg

FIELD: physics, computation hardware.

SUBSTANCE: invention relates to data transfer, particularly, to joint use of traffic at multicast. Proposed method comprises the steps whereat the router of one network segment is used to get IP-address of every router of the same segment and to get the data on the range of multicast every router is responsible for. Mask is used issued by every router for hashing algorithm as that selected from multiple masks. In compliance with multicast requested by user's hardware at connection and by the range of multicast every router is responsible for the router is selected. Also selected is the range of multicast which includes said address. Note here that when a definite router represents multiple routers each IP-address thereof is used as an input value of hashing algorithm. Router is selected in compliance with obtained hash-function corresponding to every input value which is responsible for redirection of multicast burst with multicast.

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9 cl, 6 dwg

FIELD: physics; communications.

SUBSTANCE: description is given of a method and device for switching wireless terminal channels. For this, several communication channels with different physical characteristics are supported in the cell of the base station. Each wireless terminal controls several channels and evaluates several channels at the same time, such that, there can be fast switching between channels. Information on the quality of the channel is sent from each wireless terminal to the base station. The wireless terminal or base station selects the channel, based on the evaluated quality of the channel. By supporting several channels and through periodical changes in channels in different implementation alternatives, the time taken before the wireless terminal finds good or suitable channel conditions is minimised, even if the wireless terminal changes position. Several antennae are used at the base station for simultaneous support of several channels, for example, through control of the directional pattern of the antennae.

EFFECT: reduced delays before wireless terminal finds suitable channel conditions.

66 cl, 26 dwg

FIELD: physics; communications.

SUBSTANCE: during different set conditions providing source of sound for company service information as substitutive audio signal for call return, receiver can determine whether source of sound for service information for subscriber or set time interval is provided for. Present invention provides for a method and device for obtaining substitutive repeating audio signal for call return based on choice or successively in accordance with a preset condition.

EFFECT: provision for several substitutive audio signals for call return.

26 cl, 6 dwg

FIELD: physics; communications.

SUBSTANCE: method consists of the following stages: reception of request for channel access from user terminal. Reception of the user terminal can be one of several active user terminals. The transmission cycle duration is determined as a result of reception of a request for channel access. The arrival time of data to the cycle is determined for the user terminal. The arrival time of data to the user terminal is set, so as to designate the channel for the user terminal, starting from the time of arrival of data.

EFFECT: reduced probability of collisions during transfer of data from different users.

31 cl, 8 dwg

FIELD: information technologies.

SUBSTANCE: method for assignment of band channel with adaptive modulation and coding (AMC) to subscriber stations (SS) is realised in wireless communication system, which separates full range of frequencies into multiple subcarrier bands, every of which represents set from previously specified quantity of subranges, every of which represents set of previously specified quantity of adjacent subcarriers. Method comprises the following stages: necessity in use of band channel with AMC is detected; quality of reception is measured in frequency bands; list of frequency bands with high quality of reception is formed; request is sent for assignment of band channel with AMC as well as foresaid list to base station (BS); response is received to mentioned request from BS; in compliance with response, changeover is done in SS in condition of use of band channel with AMC.

EFFECT: creation of flexible system that provides possibility for subscriber stations with proper condition of channel to realise high-speed communication with high throughput.

61 cl, 7 dwg, 3 tbl

FIELD: information technologies.

SUBSTANCE: service center (SZ) for transmission of information content should not know or define number of person who initiates loading, and sole connection (TKV) of communication from communication device (TKG) to service center (SZ) does not require making another communication contact, at that information content is requested in the first communication session (SI1) with the first notice (SN1) about service from service center (SZ), and is delivered from service center (SZ) in the second communication session (SI2) with at least one notice (SN2) about service.

EFFECT: reduction of power inputs and use of hardware resources.

18 cl, 5 dwg

FIELD: information technologies.

SUBSTANCE: system comprises subsystem of all-channel signaling processing, data base subsystem, services processing subsystem and operational maintenance subsystem, at that all subsystems are connected to communication network and accordingly realise information exchange; at that all-channel signaling processing subsystem performs function of OKC-7 processing; data base subsystem is used for storage of user data; services processing subsystem comprises one or more modules for processing of home location register services; operational maintenance subsystem comprises operational maintenance server, services acceptance terminal and close-range terminal of operational maintenance.

EFFECT: provision of possibility to service user of several types of networks via system of home location register.

5 cl, 2 dwg

FIELD: information technologies.

SUBSTANCE: in one version of realisation access network may assign group identifier (group ID) to every of pilot-signals associated with sector, for instance, on the basis of pilot-signals coverage areas, and transmit pilot-signals with appropriate group ID. PN shift may be used as group ID. Access terminal may group accepted pilot-signals in one or more pilot-signals group according to their group ID, and select representative pilot-signals from every group of pilot-signals for transmission of message about pilot-signal level. Access terminal may also use grouping of pilot-signals for efficient control of sets.

EFFECT: provision of efficient and reliable communication systems with multiple carriers.

32 cl, 13 dwg

FIELD: information technologies.

SUBSTANCE: wireless communication network comprises different base stations and subscriber stations. Every base station provides services of broadcasting content transfer to subscriber stations via communication channels of one of the following types: 1) common channel used by multiple subscriber stations, 2) individual channels, every of which is separated for use by separate subscriber station. In response to one or several preset changes of condition, i.e. change of number of subscriber stations that request the program, change of transmission power level used by base station, or in case of other change of network condition, communication channel type used for provisioning of broadcasting content to one or several subscriber stations is switched over.

EFFECT: delivery of broadcasting content with use of errors and individual channels combination, depending on whatever is more preferable in available circumstances.

5 cl, 28 dwg

FIELD: information technologies.

SUBSTANCE: one version of realisation comprises base station, which controls channel of speed indicator, decodes speed indicator channel with application of likelihood maximum decoder and determines availability of packet in speed indicator channel by comparison of probability to threshold, and analyses frame validity in packet-oriented channel on the basis of availability and content of packets accepted in speed indicator channel.

EFFECT: possibility to identify packets in speed indicator channel, high probability of good and bad frames identification in speed indicator channel and corresponding nonperiodical data transfer channel.

43 cl, 5 dwg

FIELD: information technologies.

SUBSTANCE: method and device are provided for provisioning of one or more communication services of point-point set type, such as multimedia service of broadcasting/multicasting (MBMS), to one or more mobile terminals, or subscriber devices (AA). When one or more mobile terminals are moved to new zone of mobile communication system controlled by other network component, after connection to service, information is transmitted between network elements by method.

EFFECT: facilitation of continuous service reception by mobile terminals that moved, preserving network resources and increasing efficiency of mobile communication system.

95 cl, 10 dwg

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