Selection of transport format in wireless communication systems. RU patent 2521292.

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to selection of a transport format for sending information from a sending node to a receiving node via a wireless link. The method comprises steps of: obtaining a quality indicator, wherein the quality indicator indicates the current channel quality of the wireless link; determining a throughput indicator, wherein the throughput indicator indicates the throughput of at least a first transport format and a second transport format available at the obtained quality indicator; calculating a switching value based on the quality indicator and the throughput indicator; switching to the second transport format when the quality indicator indicates that the switching value is reached or exceeded with respect to the second transport format; sending a notification to the second node, wherein the notification indicates the switch to the second transport format.

EFFECT: improvements aimed at selecting a transport format to be used by a wireless link in a wireless communication system.

12 cl, 10 dwg

THE TECHNICAL FIELD TO WHICH THE INVENTION RELATES

This invention relates to the choice of transport format for sending information from a sending host to the receiving node through a wireless line.

THE LEVEL OF TECHNOLOGY

Wireless lines are widely used in modern communications and a large number of wireless communication systems were designed to provide the wireless connection. Well-known wireless systems are, for example, global system for mobile communications (GSM), packet radio service General use (GPRS), and universal mobile telecommunications system (UMTS) and other cellular technologies or similar. Other well-known examples of wireless systems are wireless local area network (WLAN) of various types and network standard international interoperability for microwave access (WiMAX).

The choice of the relevant transport format that should be used for communication over the wireless line, is a key to retrieve the preferred operating characteristics, such as high throughput. Thus, the most modern wireless communication systems made with the possibility of dynamic selection of the preferred transport format among the set of available transport formats for sending information to the receiver via wireless line.

In General, transport format is the way in which the information is transmitted over the wireless lines. It may, for example, include used modulation, and/or encoding, and/or the power level and/or the frequency or the number of levels of transmission (rank MIMO), etc. for the compilation of wireless lines.

Twinning Project systems of the 3rd Generation (3GPP, see, for example, www.3qpp.org) indicated that the format should be selected on the basis of the so-called report of the index of quality of the channel (CQI-reports) in connection with the so-called technology of long term evolution (LTE), see, for example, the specification of the 3GPP TS 36.213 v8.6.0 "E-UTRA Physical Layer Procedures". CQI-reports typically retrieved receiver to reflect the quality of the channel and interference levels wireless lines in question. CQI-reports are then sent back to the transmitter on channel signaling wireless lines. For example, CQI-reports can be retrieved via a mobile terminal, such as user equipment (UE) or similar, and then sent back to the base station, such as a Node In or similar. When descending line adopted CQI-reports are then used by the transmitter to select transfer format that enables transfer as much user data as possible using as little resources as possible. However, for uplink typically no CQI-report, but the choice of transport format is in the base station directly from measurements of the ascending line, such as signal-to-noise ratio (SNR), and selected transport format ascending line then sent to the mobile terminal.

According to the specification 3GPP TS 36.213, V8.6.0, UE or similar shall, based on the unlimited monitoring interval in time and frequency, extract for each value of CQI, reported in podkate n ascending line, the higher CQI-index between 0 and 15, as specified in the table 7.2.3-1 the above specifications. Table 7.2.3-1 is essentially identical to table 1A in figure 1 of the attached drawings, which sets 16 different CQI-indexes 0-15, corresponding to 16 different transport formats TF 0-TF 15 . However, removing the CQI-index must satisfy the condition that a single transport unit shared physical channel descending line (PDSCH) with a combination of modulation schemes and size of the transport unit, the corresponding CQI-index and occupying the group of units of physical resources descending line, named reference resource CQI, could be accepted with the probability of transport units with errors (BLER), not exceeding 0.1. If this condition is not satisfied CQI-index 1, it must be extracted CQI-index 0. Final BLER will then be less than 0.1 in the ideal case. However, reported CQI will be delayed and worsened other measurement errors. To mitigate this, the adjustment of CQI through the outer loop, for example, be designed to measure BLER and corrective enough, so that, for example, set a goal average retransmission hybrid automatic request for repetition of transmission (HARQ) in 10%.

On figa illustrated schematically curves bandwidth transport formats TF 1-TF 15 table 1A as a function of the signal-to-noise ratio (SNR). Curves TF 1-TF 15 may, for example, to be obtained through simulations lines or similar. Besides, FIGU shows a schematic illustration of the bandwidth of one representative of the transport format TF i , which is valid with the necessary changes to all transport formats TF 1-TF 15 . As can be seen in FIGU, schematic traffic capacity of the format TF i is essentially beveled S-shaped. Throughput is maximized above a certain value, high SNR, and she is minimized (essentially zero) below a certain level low SNR. Throughput is increased c accelerating rate as the SNR increases above the value of the low SNR until the SNR value reaches values of linear low SNR, thus forming the lower curve. Higher values of linear low SNR throughput increases with essentially linear speed until the SNR value reaches high values of linear SNR, thus forming an essentially straight line. Higher values high linear SNR throughput increases with decreasing rate until the SNR value equals high SNR, thus forming the upper curve.

It should be emphasized that curves on figa are just a few examples of curves bandwidth. Various available transport formats can be from multiple possible curves bandwidth to optimize depending on them. For example, it is only possible to consider curves bandwidth without retransmissions HARQ. But it is also possible to take into account the effects of retransmissions HARQ, where, for example, chase combining or accumulate surpluses increments taken into account.

Due specifications 3GPP TS 36.213, V8.6.0 and table 1A in figure 1, containing transport formats 1-15, as schematically illustrated in Figa-2B, may be concluded that the UE or similar select a transport format with the highest bandwidth at current SNR value corresponding to the value of CQI for the wireless channel in question, ensure that BLER to transport unit does not exceed 10%. Here will be used transport format TF 15 (CQI-index 15) at excellent value SNR, which according to the table 1A has modulation 64 QAM, code-speed 948 x 1024 bits/s (6 bits/symbol). If the SNR value is deteriorating so that BLER exceed 10%, the next transport format TF 14 (CQI-index 14), which according to the table 1A has modulation 64 QAM, code-speed 873 x 1024 bits/s (6 bits/symbol). If the SNR value is deteriorating so advanced that BLER exceed 10% again, then the next transport format TF 13 (CQI-index 13), and so on until you reach the first traffic format TF 1 (CQI-index 1), which according to the table 1A has QPSK modulation with code speed 78 x 1024 bits/s (2 bits per symbol). Lower SNR values are out of range on the choice of the transport format, for which it is granted, according to the specification 3GPP TS 36.213, V8.6.0.

Transport formats 1-15 (combination of modulation and coding) according to Figure 1 are used only for messages CQI. The actual transport formats used during transmission can be larger set than reported 15, providing the ability refined granularity. The choice of transport used formats is a concrete choice of the manufacturer eNodeB. eNodeB should not necessarily (and typically should not) recommended transport to the formats specified by CQI.

However, the use of target BLER HARQ or target BLER is not optimal for the entire range of quality radio and reported CQI. Under this approach the current transport format TF i+1 will be replaced by the transport format TF i with lower bandwidth when BLER will reach 10%, even if the current transport format would provide higher bandwidth at higher values BLER (i.e. BLER & GE; 10%).

Hence, in view of the above, there is a need for improvements to the choice of transport format that should be used wireless line in wireless systems.

SUMMARY OF THE INVENTION

In General, using a single target BLER HARQ, or target BLER, or equivalent, is not optimal for the entire range of quality radio and reported CQI. This is schematically illustrated in Figs showing current traffic format TF i+1 , which provides higher throughput Thp i+1 , and transport format TF i low bandwidth Thp i .

Hence, the present invention provides at least one improvement concerning the discussion above, and the improvement is completed according to the first variant the implementation of the present invention is directed at the way the first network node to select transfer format among the many available transport of formats for information exchange with the second network hub via a wireless line. Here transportation formats are such that the first transport format has a maximum performance and all other transport formats have higher maximum performance in ascending order. The method contains the time that: get the pointer quality, and the index of quality indicates the current channel wireless lines; define a pointer bandwidth, and the pointer bandwidth indicates the bandwidth of at least the first transport format, and the second transfer format, which is available at the resulting pointer quality; compute the value of the switch at least on the basis of the index of quality and pointer bandwidth; carry out switching to a second transfer format when the pointer quality indicates that the value of switching met or exceeded regarding the second transport format; and send the notification to the second node, and the notification specifies the switch to the secondary transport format.

This provides the possibility to transport formats to switch depending on the vehicle size and AC switching value, which is calculated dynamically at least on the basis of the currently pointer quality. In turn, this makes it possible to maximize the overall throughput by following as closely as possible to the envelope curves of the individual throughput of available transport formats.

Here it should be added that accessible transport formats have maximum performance in ascending order, for example, as written below for transport formats TF 1-TF 15 on Figa and at the beginning of the section "specific options for the implementation of"giving the example of the relationship:

Thp 1 <Thp 2 <Thp 3 <Thp 4 <Thp 5 <Thp 6 <Thp 7 <Thp 8 <Thp 9 <Thp 10 <Thp 11 <Thp 12 <Thp 13 <

Thp 14 <Thp 15 .

Maximum performance is preferably the maximum throughput possible to transport the format in question, i.e. the maximum throughput under ideal conditions, or at least at a sufficiently high SNR or similar.

Index of quality may be represented by SNR, signal-to-noise ratio (SIR), CQI, BLER, or BLER HARQ, or similar.

Index bandwidth may, for example, to be represented by an array or matrix or table, or similar, which can specify bandwidth of several available transport formats. Index bandwidth may, for example, at least to specify and/or contain bandwidth is available transport formats or the bandwidth available for each transport format and its Association with the quantitative index, for example, such as quantitative CQI-index, as illustrated in table 1A in figure 1. Bandwidth for a particular transport format is preferable current capacity (or the current maximum capacity) received at a certain index quality (for example, at a certain CQI, or SNR, or similar). Throughput varies depending on the index of quality. Bandwidth can be measured, calculated and/or evaluated. Throughput can, for example, be given in the form of bits per second (bps), or characters per second, or similar.

The value of the switch may be a threshold and/or target. In some embodiments, the implementation of the threshold is the same as the target, or equivalent to a target. The value of the switch can, for example, be presented by the frequency of occurrence of errors or similar (for example, BLER, or BLER HARQ, or similar), possibly being measured and/or estimated, and/or calculated or similar, or to be represented bandwidth, or similar, accessible transport formats, probably being measured and/or estimated, and/or calculated or similar at a certain obtained the index of quality.

In the first additional embodiment, containing the signs of the first variant of implementation, the value of the switch presents the frequency of occurrence of errors, calculated on the basis of throughput of the first transport of format and bandwidth second transfer format, which is the next in order of the above index of quality.

Stages the first option exercise, combined with the first additional variant of implementation would then be the preferable: to get a pointer quality; to determine the index of bandwidth, at least pointing bandwidth (for example, the maximum possible throughput) for the first and second transport formats (for example, TF i+1 and TF i in equation (1), described below, see also figa); compute the value of the switch (for example, BLER thld,i in relation (1), where BLER thld,i depends on Thp 1 and Thp i+1 , which in its turn determined by where on the x-axis we are on figa, which in turn is determined received by the index of quality); make the switch to a second transfer format when the pointer quality (for example, BLER or similar) indicates that the value of the switch (for example, BLER thld,i ) are reached or exceeded. The calculation of the value switch-based bandwidth for the first and second transport format provides a very simple and efficient method of calculation of an appropriate value for the switch.

In the second option the exercise of which contain signs of the first variant of implementation, the pointer bandwidth presents estimated throughput of the above index of quality for each of the available transport format, adjusted by at least one of: estimated distribution of the quality of the channel specified by the index of quality; and the estimated distribution of the index of quality that indicates the current channel. In turn, switching value is calculated by obtaining the maximum bandwidth available transport formats under the above pointer quality, and switching to a second transfer format is made when the pointer quality indicates that the second transport format reached switch.

Stages the first option exercise, combined with the second additional variant of implementation would then be the preferable: to get a pointer quality; to determine the index of bandwidth, at least pointing bandwidth for the first and second transport formats (for example, using equation (7), described below, to determine the expected throughput obtained the index quality (CQI) for all available transport formats that are available, i.e. interest, with the resulting pointer quality); compute the value of the switch (for example, TF(CQI) in equation (8), described below, by selecting the transport format, which has a higher maximum throughput obtained when the pointer quality); to switch to the second transport format, when the pointer quality indicates that the value of the switch (for example, TF(CQI)) is reached or exceeded. Assuming that the first transport format, until now, had higher expected maximum throughput, the authors wanted to switch from the first transport format on the second transfer format when the second transport format has even higher expected maximum throughput obtained the index of quality. This occurs when the capacity of the second transport format reaches switch, i.e. the authors switch when the capacity of the second transport format will be higher the expected maximum throughput obtained the index of quality, for example, as calculated by the equation (8).

Moreover, the present invention provides at least one improvement concerning the discussion above, and this improvement is completed according to the second variant the implementation of the present invention is directed to the first network node, made with the possibility of operative selection of the transport format, among the many available transport formats for communication with the second network hub via a wireless line. Transport formats are such that the first transport format has a maximum performance and all other transport formats have higher maximum performance in ascending order. The first node is additionally completed with on-line: get a pointer quality, and the index of quality indicates the current channel wireless lines; define pointer bandwidth, and the pointer bandwidth indicates the bandwidth of at least the first transport format, and the second transfer format which is available when received pointer quality; calculating the value of the switch at least on the basis of the index of quality and pointer bandwidth; switching to a second transfer format when the pointer quality indicates that the value of switching met or exceeded regarding the second transport format; and dispatch of notifications to the second node, and this alert indicates that the switch to a second transfer format.

Additional advantages of the present invention and ways of its implementation will be clear from the following detailed description of the invention.

It should be stressed that the term includes/containing" when used in this description was adopted to indicate the presence of installed features, integers, stages or components, but does not exclude the presence or adding one or more other signs, integers, stages, components or their groups.

It should also be emphasized that the stages of approximate methods described in this description does not need to be executed in the order in which they appear. Moreover, options for implementation of approximate methods described in this description may contain fewer steps or additional stages without derogating from the scope of the present invention.

BRIEF DESCRIPTION OF DRAWINGS

Figure 1 shows a schematic illustration of a sample table 1A containing transport formats TF 0-TF 15 , and the approximate table 1B, containing targets error rate under variant of the implementation of the present invention.

On figa illustrated schematic illustration of bandwidth each transport format TF 1-TF 15 table 1A as a function of the signal-to-noise ratio (SNR).

On FIGU illustrated schematic illustration of bandwidth representative of the transport format TF i , which is valid with the necessary changes to all transport formats TF 1-TF 15 on figa.

On figs shows a schematic illustration showing current traffic format TF i+1 , which provides higher throughput Thp i+1 , and transport format TF i low bandwidth Thp i .

On figa shows a schematic illustration of a sample wireless communication systems according to the first variant of the implementation of the present invention.

On FIGU shows a schematic illustration of the approximate system 200 wireless according to the second variant of the implementation of the present invention.

On figs shows a schematic illustration of the approximate system 300 wireless according to the third variant of the implementation of the present invention.

On figa shown functional schematic diagram illustrating the use of option implementation of the present invention.

On FIGU shows a schematic diagram of the sequence of operations, illustrating the work of option implementation of the present invention with the descending line.

On figs shows a schematic diagram of the sequence of operations, illustrating the work of option implementation of the present invention with an ascending line.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

THE STRUCTURE OF OPTIONS FOR IMPLEMENTING

The first sample communication system

On figa shows a schematic illustration of the approximate system 100 wireless according to the first variant of the implementation of the present invention. System 100 wireless can, for example, be mobile and not mobile communication system, for example, according to the 3GPP standards, or equivalent, or IEEE 802.11b or IEEE 802.16 or similar. The approximate system 100 communication contains a number of user devices with 120_1 on 120_n and the network of 110 wireless, which in turn contains at least one layout 112 wireless connection network, as will be further described below.

Preferably at least one user device 120_1 is a portable communications device, made with the possibility to efficiently exchange data with the network 112 wireless access via a wireless line 130. Portable communication device can, for example, be a cell phone, or laptop, or equivalent, provided the respective ability of communication. Various portable devices and wireless lines of this type are well known in themselves experts in the art, and therefore they do not need a detailed description.

Layout 112 wireless access networks on figa can contain one or several pages 114 access nodes, such as base station or similar. Other variants of implementation can only contain the layout 114 access node, which then makes the entire network 112 access. In addition, some variants of implementation of the 112 network access may contain additional components such as controller 116 access to manage multiple pages 114 access nodes or similar, for example, the controller base station to control a certain number of base stations. The 112 network access is made with the possibility of exchange of user data with at least one portable device 120_1 communication over the air 130. Different access networks, such as the layout 112 wireless access network, which is or contains an access point or a similar, well-known in themselves experts in the art, and therefore they do not need a detailed description.

In addition to the known characteristics described above, it is preferable that the system is 100 wireless performed on live choice of transport format TFi among the many available transport formats with increasing capacity for information exchange between the user device 120_1 and 112 network access via wireless lines 130, as will be further explained below later in connection with the job description of embodiments of the present invention. It is preferable that the selection is performed by the unit 112c decision making in network 112 access or block 120_1c decision making in the user device 120_1. Block 120_1c decision preferably implemented through the software and/or hardware in the user device 120_1. Similarly, block 112c decision preferably implemented through the software and/or hardware on the network 112 access, for example, on a dedicated unit, and/or in the layout 114 wireless access point and/or the controller 116 access.

It should be added that the network of 110 wireless figa may contain layout 118 core network. Basic layout 118 may, for example, contain the basic layout of the site that contains one or more nodes. Basic network 118 preferably made with the possibility of operative actions as an interface between the network 112 wireless access and a variety of external data networks or similar, such as a network of 350 packet data (PDN) or similar. The Internet is a well-known example PDN.

Network 112 wireless access and layout 118 basic network shown as separate blocks on figa that may be true for certain embodiments of the present invention. However, other options for implementation may have network access 112 and basic network 118, fully or at least partially arranged in the same physical and/or logical block or blocks.

Second approximate communication system

Attention is now focused on a sample system 200 wireless, according to the second variant of the implementation of the present invention, as schematically illustrated in FIGU. It is preferable that the system 200 is a cellular system, for example, under the global system for mobile communications (GSM) or packet radio service General use (GPRS), as defined by 3GPP.

The system 200 communication contains a number of user devices with 220_1 on 220_n or similar and network 210 wireless. Network 210 wireless contains network 212 radio access and core network 218. An observant reader is aware that the system 200 is a concrete embodiment of the system 100 on figa. Thus, a custom device with 220_1 on 220_n match the user's devices 120_1 on 120_n, 210 network connection matches the network of 110 communication network 212 corresponds radio access network 112 wireless access and core network 218 corresponds to the layout 118 core network.

The structure and operation of communication systems, such as model system 200 on FIGU, well known for themselves experts in the art, and they do not need explanation. However, a brief overview is provided below.

It is preferable that user devices with 220_1 on 220_n are mobile stations (MS) or user equipment (UE), as defined by 3GPP, or similar devices with the same function. Such devices are well known in themselves experts in the art, and therefore they do not need a detailed description.

It is preferable that the network 212 radio access contains one or more base stations 214_1 on 214_n or similar composition of access nodes, such as base transceiver station (BTS), or NodeB (NB), or equivalent, as defined by 3GPP. Preferably at least one base station 214_1 made with the possibility of the rapid exchange of user data with at least one user device 220_1 over the air 230. Base transceiver station (BTS) or NodeB (NB) and similar composition access nodes are well known in themselves experts in the art, and therefore they do not need any detailed description.

It is preferable that the network 212 radio access contains one or more pages 216 base station controllers or similar. Layout 216 base station controllers preferably made with the possibility of operative management of radio resource group of base stations with 214_1 on 214_n. Layout 216 base station controllers on FIGU may, for example, be a controller base station (BSC), or radio network controller (RNC), or equivalent, as defined by 3GPP. The base station controllers (BSC) and/or radio network controllers (RNC) or similar controllers access nodes are well known in themselves experts in the art, and therefore they do not need a detailed description.

It is preferable that the underlying network 218 contains the service node 218a and gateway node 218b or similar layout of the core network nodes. The service node can, for example, be the serving GPRS support node (SGSN), and service node can, for example, be the gateway GPRS support node (GGSN), as is well known to specialists in the field of technology. On FIGU gateway node 218b runs from one end of a basic network of 218 as an interface between the core service network 218 and external data networks, such as the network of 350 packet data (PDN). From the other end of the base network 218 serving node 218a operates as an interface between the core service network 218 and at least one network 212 radio access. The service node 218a and gateway node 218b shown FIGU as separate blocks. However, other options for implementation may be serving node 218a and gateway node 218b, fully or at least partially arranged in the same physical and/or logical block or blocks. Serving GPRS support node (SGSN) and gateway GPRS support node (GGSN) or similar nodes basic network well-known in themselves experts in the art, and therefore they do not need a detailed description.

In addition to the known characteristics described above, it is preferable that the system 200 wireless performed, under variant of the implementation of the present invention, so as to quickly choose a transport format TFi among the many available transport formats with increasing capacity for information exchange between the user device 220_1 and network 212 access via wireless lines 230, as will be further explained below later in connection with the job description of embodiments of the present invention.

It is preferable that the selection is performed by the unit 212c decision making in network 212 access or block 220_1c decision making in the user device 220_1. Block 220_1c decision preferably implemented through the software and/or hardware in the user device 220_1. Similarly, block 212c decision preferably implemented through the software and/or hardware on the network 212 access, for example, on a dedicated unit, and/or in the base station 214_1, and/or in the controller 216 base station.

Third approximate communication system

Attention is now focused on a sample system 300 wireless, according to the third variant of the implementation of the present invention, as schematically illustrated in Figs. It is preferable that the system is 300 system of cellular communication, for example, according to universal mobile telecommunications system (UMTS), as defined by 3GPP, or rather extensions UMTS, such as technology of long term evolution (LTE) 3GPP or similar.

The system is 300 communication contains a number of user devices with 320_1 on 320_n or similar and network 310 wireless. Network 310 wireless contains the layout 312 radio access network and layout 314 core network. An observant reader is aware that the system 300 is a concrete embodiment of the system 100 on figa. Thus, a custom device with 320_1 on 320_n match the user's devices 120_1 on 120_n, network 310 connection matches the network of 110 communication network 312 corresponds radio access network 112 wireless access and core network of 318 corresponds to the layout 118 core network. The system is 300 pigs is similar system 200 on FIGU, but in the layout 312 radio access network system 300 no link 216 controller base station.

The structure and operation of communication systems, such as model system 300, well known for themselves experts in the art, and they do not need explanation. However, a brief overview is provided below.

In the case of LTE systems, then the core network of 318 corresponds developed core packet switching (EPC), whereas the network 312 radio access corresponds to a developed network of terrestrial radio access networks for UMTS (E-UTRAN).

Moreover, in the case of LTE systems should that user devices with 320_1 on 320_n are cell phones, such as user equipment (UE) or similar devices with similar functions. Thus, devices 320_1 on 320_n are the same as or similar, as devices with 220_1 on 220_n described above with reference to FIGU.

In the case of LTE systems also implies that the network 312 radio access contains many base stations 314_1 on 314_n in the form of extended NodeB (eNB) or similar as specified by 3GPP. eNB with 314_1 on 314_n are similar to the NB with 214_1 on 214_n above with reference to FIGU. However, as mentioned above, in the network 312 radio access controller is not 216 base station. Instead, radiooncology, or similar controller 216 base station in the 200 distributed and implemented in each eNB with 314_1 on 314_n system 300.

In addition to the known characteristics described above, it is preferable that the system is 300 wireless performed, under variant of the implementation of the present invention, so as to quickly choose a transport format TFi among the many available transport formats with increasing capacity for information exchange between the user device 320_1 and network 312 access via wireless lines 330, as will be further explained below later in connection with the job description of embodiments of the present invention.

It is preferable that the selection is performed by the unit 312c decision making in network 312 access or block 320_1c decision making in the user device 320_1. Block 320_1c decision preferably implemented through the software and/or hardware in the user device 320_1. Similarly, block 312c decision preferably implemented through the software and/or hardware on the network 312 access, for example, in a separate block and/or eNB 314_1.

The above-user devices with 120_1 on 120_n, with 220_1 on 220_n, with 320_1 on 320_n and/or network 112, 212, 312 wireless access and/or basic network 118, 218, 318, acting as interface between layouts access networks and a variety of external data networks, can, without derogating from the present invention, to have other configurations, retreating from the configurations described above.

THE WORK OF OPTIONS FOR IMPLEMENTING

Review of the work, specific ways of implementation

In variants of the implementation of the present invention is selected transport format among the many available transport formats with TF 1 TF 15 . Transport formats are such that the first transport format TF 1 has the first performance Thp 1 and all other transport formats with TF 2 TF 15 have better performance in ascending order. In other words, the performance of the Thp 1 transport format TF 1 less than the performance of the Thp 2 transport format TF 2 , which, in turn, less than the performance of the Thp 3 transport format TF 3 , and so on until the performance Thp 14 transport format TF 14 , which is less than the performance Thp 15 transport format TF 15 , with higher performance.

Expressed differently:

Thp 1 <Thp 2 <Thp 3 <Thp 4 <Thp 5 <Thp 6 <Thp 7 <Thp 8 <Thp 9 <Thp 10 <Thp 11 <Thp 12 <Thp 13 <

Thp 14 <Thp 15 .

This is illustrated in figa, showing the approximate transport formats with TF 1 TF 15 with increasing productivity. Transport formats with TF 1 TF 15 meet CQI-indexes 1-15 in table 1A from figure 1, in which CQI-index 1 has a capacity that is less than the performance CQI-index 2, which in turn has a capacity that is less than the performance CQI-index 3 and so on up to CQI-index 14, which has a capacity that is less than the performance CQI-15 index, with the highest performance.

Before we continue, it should be emphasized that may be more or less transport formats than fifteen transport of the formats shown in table 1A from figure 1 and Figo. Also, available transport formats should not be pre-defined, such as the predefined combination of modulation and coding schemes or similar. Also, available transport formats can be other types than the transport in the format of table 1A with figure 1, for example, contains other combinations of modulation and coding schemes or similar.

Now, in an exemplary embodiment, illustrated in figure 1 and figa-2C, selected transport format TF i among the available transport formats with TF 1 TF 15 for information exchange between the sending node (for example, a site 114, 214_1, 314_1 access or a custom device 120_1, 220_1, 320_1) and the host node (for example, user device 120_1, 220_1, 320_1 or node 114, 214_1, 314_1 access via a wireless line 130, 230, 330, as will be further described below.

Here is the procedure of adaptation of the line preferably designed to select among the available transport formats with TF 1 TF 15 to maximize throughput wireless lines. One approach is to maximize throughput for a particular feed, which is the envelope of the capacities of the transport formats TF 1-TF 15 on figa. Switching value are then the intersection point on the y-axis, for example, as indicated by TH2, transport format TF i and TF i+1 on figs.

Based on a static view of the individual throughput of sample transport formats TF 1-TF 15 , as schematically illustrated in figa-2C, quite a good approximation switching value may, for example, be based on the maximum possible bandwidth transport formats TF i , TF i+1 , question, for example, given the following equation:

It should be noted that this is not necessarily a good approximation on the x-axis.

In equation (1) is switching presents the threshold error rate as a target indicator of the probability of transport units with errors BLER thld,i or similar. BLER thld,i preferably calculated based on the maximum possible bandwidth Thp i+1 of the first transport format TF i+1 and the maximum possible bandwidth Thpi second transfer format TF i , which is the next in order, at current value SNR or similar.

Transport format then switches from the first transport format TF i+1 on the second transport format TF i , when reached calculated BLER thld . The use of equation (1) to transport formats TF 1-TF 15 , relevant CQI-indexes 1-15 in table 1A with figure 1, leads to the set targets error rate, as shown in table 1B right column of figure 1. As can be deduced from equation (1) and table 1B, specific transfer format TF i+1 is kept at a certain value SNR or at a certain interval values SNR or similar, while the value BLER or value BLER HARQ or similar reaches calculated BLER thld,i+1 . Then the transport format switches to the next transport format TF i , which is the next in order, at current value SNR or similar. For example, according to table 1B figure 1, the transport format switches from CQI-index 15 14 when the value BLER or value BLER HARQ or similar will reach 8%, and CQI-index 14 13 when the value BLER or value BLER HARQ or similar will reach 12%, and so on.

In other words, in this case a specific transfer format TF i+1 is kept at a certain value SNR or at a certain interval of the SNR values specified a particular value SNR or similar, while the frequency of occurrence of errors will not rise to the area that the transportation capacity of the format TF i+1 will be essentially equal to the maximum bandwidth the next vehicle format TF i in order throughput. From this it is clear that the thresholds may also be installed in the domain SNR, and not according to the frequency of occurrence of errors, such as BLER or similar. This may be appropriate in ascending line, as measurement SNR available in eNodeB. In the descending line thresholds can also be set when the domain CQI and selection on the basis of average filtered CQI.

Equation (1) is one of several options for the implementation of the present invention, which enables the message CQI of user devices, as defined according to figure 1 (right column), and not switch in 10% increments in between all transport formats, as is typically specified.

To summarize, the equation (1) gives the optimal switching points for a good capacity for the transport of formats TF 1-TF 15 , leading to different target frequency of occurrence of errors in different bands SNR or similar. As reported CQI provides information on the possible range for the current SNR, this information can be used to determine the correct target the error rate for the algorithm adjustments CQI through the outer loop.

However, the optimal switching point throughput obtained by equation (1)does not take into account the probability distribution for SNR about the observed values reported CQI.

At this point, we can let p CQI (SNR) indicate the estimated probability distribution for SNR in the case of a transfer where the actual SNR in (future) if the transfer is considered as a random variable whose probability distribution function specified by p CQI (SNR). The estimated probability distribution p CQI (SNR) can, for example, be based on statistics reported CQI or it may be a function dependent on the last reported CQI.

Simulation lines as those illustrated in Figa-2C, given that the reported CQI coincides with the lower range SNR is low (CQI) for SNR, or similar, with the upper range of high SNR (CQI).

Ranges of values SNR's CQI , by matching the values reported CQI, can then be defined interval:

Then potential S CQI (i) of the interval S CQI , for which the transport format TF i is optimal bandwidth, according to the equation (1) can be expressed through:

Besides, the transport set of formats that are optimal bandwidth, according to equation (1) or similar somewhere in the interval S CQI can be marked I CQI .

This means that S CQI (i), where some i CQI , forms a segment SCQI such that

Now, BLER CQI,i (SNR), which BLER at a certain SNR or similar, when used a specific transfer format TF i , for instance, they can be calculated and/or evaluated through simulation lines as those that are schematically illustrated in figa-2C, or similar.

The expected optimal bandwidth BLER CQI , when observing a certain CQI, can then be calculated as:

The expected optimal bandwidth BLER CQI can be used directly as a target BLER for the outer loop.

BLER CQI is, as mentioned above, the expected BLER, when deciding the optimal bandwidth TF. Adaptation lines (LA) may try to make a choice of the optimal bandwidth TF, or it may simply follow the suggestion given CQI-report. In both these cases, there is a potential need to have an external loop that cares about errors channel estimation in CQI-report and/or discrepancy true curves bandwidth and simulated (for example, based on simulations lines, curves bandwidth. Here confirming and nattergale messages or similar (AckNacks), adopted by the transmitter and the receiver, as is well known to specialists in a given field of technology can provide estimates of the true BLER, which can be compared with (relevant) BLER CQI . If the assessment BLER lower than BLER CQI , LA was too conservative in choosing TF, and higher TF would give higher throughput. As a result, LA could make the right adjustments more aggressive in choosing FT. For example, running AckNack external cycle could increase (leading to more aggressive choice TF) adjustment.

Until now in our discussions, transport format was switched to a more optimal bandwidth transport format, when reached calculated target error rate. This approach is suitable when used, the outer loop, corrective choice of transport format. However, in other variants of realization of the transport format switches to a more optimal bandwidth transport format based on the optimization without requiring any external cycle.

By this time throughput thp i (SNR) at a certain SNR or similar, when used a specific transfer format TF i , for instance, they can be calculated and/or evaluated through simulation lines, such as those that are schematically illustrated in figa-2C.

The expected throughput thp i (CQI), when there is a certain CQI and when to use specific transfer format TF i, can then be calculated as:

As described above, thp i (SNR) is preferably bandwidth at a certain SNR or similar, when used a specific transfer format TF i , and p CQI (SNR) is preferably indicating the function of the estimated probability distribution for SNR based on the values reported CQI.

TF(CQI), when there is a certain CQI, can then be selected as:

As described above, thp i (CQI) is expected bandwidth when there is a certain CQI and when to use specific transfer format TF i .

Here is switching is calculated so that we obtain the maximum bandwidth available transport formats when observed CQI. The first transport format then switches to the second transport format, if the second transport format has a maximum throughput of the observed CQI, i.e. if the bandwidth of the second transport format reaches switch.

The outer loop could be combined with optimization procedure in equation (7). Target BLER for the outer loop should then be evaluated BLER for the selected TF, which can be computed as:

where thp TF(CQI),max is the maximum throughput possible for the transport format TF(CQI), and thp TF(CQI) (SNR) is preferably expected throughput at a certain SNR or similar when using the transport format TF(CQI), while pCQI(SNR) is preferably indicating the function of the estimated probability distribution for SNR based on the values reported CQI.

However, variation of channels for wireless lines cause uncertainty about the status of the channels in cases of actual transfer. As channel status can display large and rapid variations may be large uncertainties in reported CQI. The uniform distribution of SNR for a particular CQI is less accurate assumption. Moreover, in ascending line SNR is available in eNodeB, providing an opportunity to better assess the SNR distribution. Consequently, the use of reported CQI as predictions of CQI in the case of a transfer can be less preferable in some cases. The uncertainty in the reported CQI and the corresponding estimated SNR can be taken into account when distribution is assessed SNR.

At this point, we can let the function f CQI (q) denote the estimated probability distribution for CQI in the case of a transfer where the actual CQI in (future) if the transfer is considered as a random variable whose probability distribution function specified by f CQI (q). It is preferable that f CQI (q) is estimated for each user device on the basis of reported CQI. Then the choice of transport format can be specified as:

In the equation above, the STF is a set of transport formats, and thp fCQI,i (q) is the assessment of the expected throughput when using the transport format TF i , if true channel could have CQI=q in the case of transfer. Thus, thp fCQI,i (q) will include a final evaluation of the SNR distribution, taking into account the distribution of CQI.

One opportunity for education thp fCQI,i (q) is given by:

Here we set p fCQI,q (SNR) = p q (SNR)f CQI (q).

As described above, thp i (SNR) is preferably bandwidth at a certain SNR or similar, when used a specific transfer format TF i , p and q (SNR) is preferably indicating the function of the estimated probability distribution for SNR for each value of CQI, whereas f CQI (q) denotes the function of the estimated probability for CQI.

Then the choice of transport format can be specified as:

Case in which a measure SNR is (as, for example, in ascending line LTE) estimate of the distribution of SNR is clear and simple.

Again, as mentioned earlier, is the need to combine it with an external loop. In this case, equation (10) is complemented by a member of the adjustment that is managed by running through AckNack cycle management. Target BLER should then be expected/predicted BLER, when you select TF according to equation (10), which includes a member of the current correction. Expected/predicted BLER could, of course, to be filtered prior to use as a target BLER. If the assessment true BLER (which may be in addition filtered) lower than the target BLER, a member of adjustment increases.

where we could install

Specific operation of the specific options for the implementation of

Attention is now focused on functional schematic diagram shown in figa, and schematic diagram of the sequence of operations is shown in FIGU and figs that illustrate the work of approximate embodiments of the present invention. Work is preferably performed by block 112c, 212c, 312c decision making in network host, such as a node 114, 214_1, 314_1 access, for example, a base station or similar, or even more preferably in a network host, such as a custom device 120_1, 220_1, 320_1. However, this does not exclude that the work can be at least partially performed by the decision block, fully or at least partially linked to other parts of the layout 112, 212, 312 access network, which is part of the system of 100, 200, 300 links.

The rough work, illustrated functional diagram on figa will now be considered in more detail below.

At the first stage S1 it is preferable that the system is 100, 200, 300 wireless been activated. It is also preferable that at least one user device 120_1, 220_1, 320_1 (such as a cell phone or similar) system 100, 200, 300 connection is in the range of at least one node 114, 214_1, 314_1 wireless access (for example, the base station or similar) system 100, 200, 300 links. For purposes of this description of embodiments of the present invention, the node 114, 214_1, 314_1 access and user device 120_1, 220_1, 320_1 both are considered as "hosts".

At the second stage, S2, it is preferable that the first transport format is used for reporting on the first network node from the second network node through a wireless line 130, 230, 330. In the following it is assumed that the first network node is a custom device 120_1, 220_1, 320_1, and a second network node is 114, 214_1, 314_1 access, as illustrated in FIGU. However, the observant reader understands that this description applies with the necessary changes, when the first network node is 114_1, 214_1, 314_1 access and a second network node is a custom device 120, 220_1, 320_1, as illustrated in figs.

Before continuing, it should be noted that the first transport the format used on the stage S2, might actually be selected according to the variant of the implementation of the present invention. However, it is not required. Conversely, first transport format used on the stage S2, may, without derogating from the present invention to be selected in any appropriate way.

At the third stage S3 is preferable that the pointer quality received the first network node. It is preferable that the pointer quality indicates the current wireless channel line 130, 230, 330. Index of quality can, for example, be a so-called index of the quality of the channel (CQI) or similar, such as CQI or similar learned through UE or similar, within the structure of the 3GPP specifications. Index of quality can, for example, be some other well-known measure of the quality of the channel, for example, signal-to-noise ratio (SNR) or signal-to-noise ratio (SIR) or similar that, for example, can be extracted or are otherwise available base stations, such as NodeB or eNodeB or similar, within the structure of the 3GPP specifications.

At the fourth stage S4 is preferable that you have defined an index of bandwidth. It is preferable that the pointer bandwidth indicates the capacity of the first transport of format and at least the second transfer format, which is available to the first Ethernet node. Throughput can, for example, be the maximum throughput, or estimated bandwidth, or the expected bandwidth, or similar. Index bandwidth can specify the bandwidth for a subset of the available transport formats, or it could specify the bandwidth for all or substantially all of the transport format, which is available to the first Ethernet node.

Index of quality could be presented as a table layout or similar. For example, such as the layout tables 1A and 1B, shown in figure 1 or equivalent, which sets or specifies the bandwidth for different transport formats TF 1-TF 15 (which can match different CQI-indexes, see table 1A) and frequency of occurrence of errors or target error rate for each transport format TF 1-TF 14 (see cent in the right column of table 1B). Index bandwidth can be defined by simply providing the first network node and/or second network node predefined pointer bandwidth in layout view a table or similar. Such pointers bandwidth can be dynamically updated, for example, through the provision of new pointer bandwidth, when necessary, for example, if any other property in the index bandwidth should be changed.

Alternatively, according to equations (7) and (11), index bandwidth may to be submitted estimated bandwidth for each of the available transport format (i.e. the transport format, is available to the first network node), and the transport formats are evaluated when the pointer quality obtained at the stage S3 (for example, when CQI or SNR, or the like, obtained at the stage S3), and adjusted through at least one of: estimated distribution of the quality of the channel specified received a pointer quality, and/or estimated distribution of the resulting index, which indicates the current channel.

At the fifth stage S5 is preferable that the value of the switch is calculated on the basis of the index of quality, obtained at the stage S3, and pointer bandwidth defined at the stage of S4.

According to equation (1), the value of the switch can, for example, be presented by the frequency of occurrence of errors, which is calculated based on the bandwidth of the first transport of format and bandwidth second transfer format, which is the next in order of the above index of quality. Then the next step S6 first transport format can be switched to a second transfer format when the pointer quality indicates that reached the calculated frequency of occurrence of errors.

Alternatively, according to equation (6) is switching can be represented estimated by the frequency of occurrence of errors, calculated based on the assessment of the error rate for the first transport format when the pointer quality obtained during the S3, and on the basis of distribution as a channel wireless lines in the above index of quality. Then the next step S6 first transport format can be switched to a second transfer format, which is the next in order of the above pointer as a pointer quality indicates that reached the calculated frequency of occurrence of errors.

Alternatively, according to equations (8), (10) or (12) the value of the switch can be calculated by obtaining the maximum bandwidth available transport formats when received at the stage S3 index quality. For example, in equation (8) maximum throughput can, for example, be based on the expected throughput at a certain SNR or similar, when used a specific transfer format TF i possibly adjusted for the function estimated probability distribution for SNR based on the values reported CQI. In another example, according to the equation (10), maximum throughput can, for example, be an assessment of the expected throughput when using the transport format TF i , suggesting that the true channel could have CQI=q in the case of transfer. Then the next step S6 first transport format can be switched to a second transfer format when the pointer quality indicates that the second transport format reached switch.

At the sixth stage S6 is preferable that the first transport format switches to a second transfer format when the pointer quality indicates that the value of switching met or exceeded.

According to equations (8), (10) or (12), the first transport format can be switched to a second transfer format when the pointer quality indicates that the second transport format reached switch.

At the seventh stage S7 is preferable that the second network node notified the first network site about switching on the second transport format.

The way preferably stopped at the eighth stage of the S8.

The present invention was now described with reference to indicative options for implementation. However, this invention is not limited to the implementation described in this document. Conversely, the whole area of the present invention is determined only by the amount of the included claims.

1. The way the first network node(114, 214_1, 314_1; 120_1, 220_1, 320_1) to select a transport format among the many available transport formats (TFi, TFi+1) for communication with the second network node(120_1, 220_1, 320_1; 114, 214_1, 314_1) over the wireless line (130, 230, 330), and transport formats are such that the first transport format has the first maximum performance and all other transport formats have higher maximum performance in ascending order, characterized in that the method includes the phases in which: - get the index of quality, CQI, or SNR, and the index of quality, CQI, or SNR indicates current channel wireless line, specifying the index of bandwidth, and the pointer bandwidth (thpi(CQI), thpfCQI,i(q)), under the above pointer quality, CQI or SNR, for each of the available transport format (TFi) is calculated as:

this thp i (SNR) is the bandwidth in certain SNR, when used a specific transfer format, SNR(CQI) is a range of distribution of SNR, as a function of CQI, pCQI(SNR) is a function of the estimated probability distribution for SNR based on the values reported CQI, SNR(CQI) is a range of distribution of SNR, as a function of q, where q is a given CQI, pq(SNR) is a function of the estimated probability distribution for SNR for each value of CQI, where q is a given CQI, and fCQI(q) is a function of the estimated probability for CQI in the case of transfer, where q is a given CQI, - find optimal bandwidth transport format (TF(CQI, TF(fCQI)), which gives the maximum of pointers bandwidth (thpi(CQI)) or which maximizes weighted sum of pointers bandwidth (thpfCQI,i(g)), - carry out switching to optimal throughput transport format (TF(CQI, TF(fCQI)), - send a notification on the second node, and the notification specifies the switch to the optimal bandwidth transport format (TF(CQI, TF(fCQI)).

2. The method according to claim 1, wherein find on optimal throughput transport format (TF(CQI, TF(fCQI)), additionally contains the stage at which: find optimal bandwidth TF (TF(CQI, TF(fCQI)) as:

this thp i (CQI) is expected bandwidth when there is a certain CQI and when to use specific transfer format TFi, which STF is a set of transport formats, or

this thpƒ CQI , i (q) is the assessment of the expected throughput when using the transport format, TFi, if true channel would have CQI=q in the case of transfer, and in which STF is a set of transport formats, or

this thpi(q) is the expected bandwidth when there has been some q and when to use specific transfer format TF i , f CQI (q) is the estimated probability distribution for CQI in the case of transfer, where q is a given CQI and in which S TF is a set of transport formats.

3. The method according to claim 1, wherein: sending notifications by sending index of index of the quality of the channel (CQI-index)associated with optimal bandwidth transport format (TF(CQI, TF(f CQI )).

4. The method according to claim 1 in which: available transport formats (TF i , TF i+1 ), with better performance in ascending order, associated with the quantitative indices (CQI-index) increasing order.

5. The method according to claim 1, wherein: pointer bandwidth (thp i (CQI), thpƒ CQI , i (q)) presents the estimated bandwidth (thp i (SNR)), which includes the accumulation of retransmissions under the above pointer quality CQI or SNR.

6. The way by any of the preceding paragraphs, in which: the method is the first network node, which is the user device (120_1, 220_1, 320_1) or site (114, 214_1, 314_1) access.

7. The first network node(114, 120_1, 220_1; 320_1, 220_1, 320_1), made with the possibility of operative selection of the transport format, among the many available transport formats (TF i , TF i+1 ) for communication with the second network node(120_1, 220_1, 320_1; 114, 214_1, 314_1) over the wireless line (130, 230, 330), and transport formats are such that the first transport format has the first maximum performance and all other transport formats have higher maximum performance in ascending order, characterized in that the first node is additionally executed with the possibility of prompt: - get the index of quality, CQI, or SNR, and the index of quality, CQI, or SNR indicates the current wireless channel line - detect pointer bandwidth, and a pointer bandwidth (thp i (CQI), thpƒ CQI , i (q)), under the above pointer quality, CQI, or SNR, for each of the available transport format (TFi, TFi+1) is calculated as:

this thp i (SNR) is the bandwidth in certain SNR, when used a specific transfer format, SNR(CQI) is a range of distribution of SNR, as a function of CQI, p CQI (SNR) is a function of the estimated probability distribution for SNR based on the values reported CQI, SNR(q) is a range of distribution of SNR, as a function of q, where q is a given CQI, p q (SNR) is a function of the estimated probability distribution for SNR for each value of CQI, where q is a given CQI, and * CQI (q) is a function of the estimated probability for CQI in the case of transfer, where q is a given CQI, - the optimal bandwidth transport format (TF(CQI, TF(f CQI )), which gives the maximum of pointers bandwidth (thp i (CQI)) or which maximizes weighted sum of pointers bandwidth (thpƒ CQI , i (q)), switches to the optimum throughput transport format (TF(CQI, TF(f CQI )), and send notifications to the second node, and the notification specifies the switch to the optimal bandwidth transport format (TF(CQI, TF(f CQI )).

8. The first network node(114, 214_1, 314_1; 120_1, 220_1, 320_1) according to claim 7, in which the network node addition is made with the possibility of prompt: the optimal bandwidth TF (TF(CQI, TF(fCQI)) as:

this thp i (CQI) is expected bandwidth when there is a certain CQI and when to use specific transfer format TF i , in which the STF is a set of transport formats, or

this thp fCQI , i (q) is the assessment of the expected throughput when using the transport format, TFi, if true channel has CQI=q in the case of transfer, and in which the STF is a set of transport formats, or

this thp i (q) is the expected bandwidth when there has been some q and when to use specific transfer format TF i , f CQI (q) is the estimated probability distribution for CQI in the case of transfer, where q is a given CQI and in which the STF is a set of transport formats.

9. The first network node(114, 214_1, 314_1; 120_1, 220_1, 320_1) according to claim 7, in which the network node addition is made with the possibility of prompt: notice the second network node by sending index of index of the quality of the channel (CQI-index)associated with optimal bandwidth transport format (TF(CQI, TF(f CQI )).

10. The first network node(114, 214_1, 314_1; 120_1, 220_1, 320_1) according to claim 7, in which the first node addition is made with the possibility of prompt: switch available transport formats (TF i , TF i+1 ), with better performance in ascending order and associated with the quantitative indices (CQI-index) increasing order.

11. The first network node(114, 214_1, 314_1; 120_1, 220_1, 320_1) according to claim 7, in which the first node addition is made with the possibility of prompt: definitions pointer bandwidth (thp i (CQI), thpƒ CQI , i (q)), so the pointer bandwidth presents the estimated bandwidth (thpi(SNR)), which includes the accumulation of retransmissions under the above pointer quality, CQI, or SNR.

12. The first network node on any of the claims 7-11, in which the network node is a custom device (120_1, 220_1, 320_1) or site (114, 214_1, 314_1) access.