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CN101630991B - Time division synchronous code division multiple access terminal and method for determining channel quality instruction - Google Patents

Time division synchronous code division multiple access terminal and method for determining channel quality instruction Download PDF

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CN101630991B
CN101630991B CN 200810116686 CN200810116686A CN101630991B CN 101630991 B CN101630991 B CN 101630991B CN 200810116686 CN200810116686 CN 200810116686 CN 200810116686 A CN200810116686 A CN 200810116686A CN 101630991 B CN101630991 B CN 101630991B
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block size
correspondence
interference ratio
current
downlink shared
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CN101630991A (en
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顾伟
陈玉
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Sanechips Technology Co Ltd
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ZTE Corp
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Abstract

本发明提供了一种时分同步码分多址接入终端及其信道质量指示确定方法，该方法包括：设置第一对应关系，第一对应关系为在预先选定的一种固定时隙数和码道数下等效编码率与信干比之间的对应关系；在测量出高速物理下行共享信道当前的信干比后，通过第一对应关系确定与当前的信干比相对应的等效编码率，并根据预先设定的第二对应关系确定与当前的信干比相对应的当前推荐的调制方式，第二对应关系为信干比与推荐的调制方式之间的对应关系；根据当前分配给高速物理下行共享信道的时隙数和码道数、以及确定的等效编码率确定当前推荐的传输块大小。利用上述技术方案，只需存储一种物理资源分配情况下的等效码率和SIR的对应表，可以节省大量的存储空间。

Figure 200810116686

The present invention provides a time division synchronous code division multiple access terminal and a method for determining channel quality indication thereof. The method includes: setting a first corresponding relationship, the first corresponding relationship is between a pre-selected number of fixed time slots and The corresponding relationship between the equivalent coding rate and the signal-to-interference ratio under the number of code channels; after measuring the current signal-to-interference ratio of the high-speed physical downlink shared channel, determine the equivalent coding corresponding to the current signal-to-interference ratio through the first correspondence rate, and determine the currently recommended modulation method corresponding to the current SIR according to the preset second correspondence, the second correspondence is the correspondence between the SIR and the recommended modulation method; according to the current distribution The currently recommended transport block size is determined for the number of time slots and code channels of the high-speed physical downlink shared channel, and the determined equivalent coding rate. With the above technical solution, it is only necessary to store the corresponding table of the equivalent code rate and the SIR under a condition of physical resource allocation, which can save a large amount of storage space.

Figure 200810116686

Description

Method is determined in time division synchronization and code division multi-address access terminal and channel quality indication thereof
Technical field
The present invention relates to TD SDMA access (TD-SCDMA) technology, particularly definite method of a kind of TD-SCDMA terminal and channel quality thereof indication (CQI, Channel Quality Indicator).
Background technology
High speed downlink packet access (HSDPA, High Speed Downlink Packet Access) technology is a kind of Highspeed Data Transmission Technology of introducing in order to satisfy the growing data service of mobile subscriber.In the TD-SCDMA system, by introducing high-speed physical downlink shared channel (HS-PDSCH) (HS-PDSCH, High SpeedPhysical Downlink Shared Channel) strengthens air interface, and with High-Speed Shared Control Channel (HS-SCCH, High Speed Shared Control Channel) and high-speed shared information channel (HS-SICH, High Speed-Downlink Shared Channel) finishes relevant controlling mechanism, adopt Adaptive Modulation and Coding (AMC, Adapt Modulation Coding) technology, mixed automatic retransfer request (HARQ, Hybrid Automatic Repeat Request) technology etc. has increased data throughput capabilities.Fig. 1 shows the HS-PDSCH of prior art and the timing diagram of HS-SICH.Fig. 2 shows the HS-PDSCH of prior art and the timing diagram of HS-SCCH.
AMC is the core technology of HSDPA.Usually, people utilize the transmitting power of adjusting channel, improve channel transmission quality, if the signal interference ratio (SIR of channel, signal to interference ratio) lower, then increase transmitting power, otherwise, then reduce transmitting power, in this process, chnnel coding is changeless, and the AMC technology then can be along with the change of SIR, select suitable modulation coding mode, when SIR is low, adopt Quadrature Phase Shift Keying (QPSK) modulation, when SIR is higher, adopt 16 ary quadrature amplitude (16QAM), with the data throughput capabilities that increases.
Be subscriber equipment (UE, User Equipment) to portable terminal, need to measure the SIR of descending HS-PDSCH, according to SIR, modulation system and the code rate suggestion of HS-PDSCH are proposed to the base station, utilize CQI, by the HS-SICH channel, send to the base station.
CQI includes two kinds of information: the modulation system (RMF of recommendation, Recommended ModulationFormat), transmission block size (the RTBS that recommends, Recommended Transport Block Size), common way is, pre-determined in advance the mapping table of SIR and CQI by system emulation, this SIR of prior art and the mapping table of CQI are the mapping table between SIR and RMF and the RTBS, after finishing sir measurement, directly by showing take SIR as index search, can determine RMF and RTBS, but because in the HSDPA of TD-SCDMA system, the distribution of physical resource relates to 5 time slots, 16 code channels of each time slot, with whole combinations of the distribution condition of various physical resources totally 5 * 16=80 kind situation all make table, enormous amount, for bottom layer realization, the space that takies is too large, and, mapping table can't be adjusted after solidifying.
Summary of the invention
The definite method that the purpose of this invention is to provide the indication of a kind of TD-SCDMA terminal and channel quality thereof is to solve the needs a large amount of memory spaces of prior art by traveling through all physical source distributing and may come to determine that the channel quality indication caused, and the technical problem of realization high cost.
For achieving the above object, provide a kind of channel quality indication of time division synchronization and code division multi-address access terminal to determine method, described channel quality indication comprises the transmission block size of recommendation and the modulation system of recommending, and wherein, comprises the steps:
The first corresponding relation is set, and described the first corresponding relation is at the corresponding relation between equivalent encoding rate and the signal interference ratio under previously selected a kind of fixedly timeslot number and the code channel number;
After measuring the current signal interference ratio of high-speed physical downlink shared channel (HS-PDSCH), by the equivalent encoding rate that described the first corresponding relation is determined and described current signal interference ratio is corresponding, and determine and the modulation system of the current recommendation that described current signal interference ratio is corresponding corresponding relation between the modulation system that described the second corresponding relation is signal interference ratio and recommendation according to predefined the second corresponding relation;
Determine the transmission block size of current recommendation according to the current timeslot number of distributing to high-speed physical downlink shared channel (HS-PDSCH) and code channel number and described definite equivalent encoding rate.
Preferably, described method wherein, describedly at the corresponding relation between equivalent encoding rate and the signal interference ratio under previously selected fixedly timeslot number and the code channel number is:
At the corresponding relation between equivalent encoding rate and the signal interference ratio under code channel of a time slot.
Preferably, described method, wherein, the step of the transmission block size of described definite recommendation comprises:
Determine the current data volume that can bear on the high-speed physical downlink shared channel (HS-PDSCH);
In predefined the 3rd corresponding relation, find out the data volume identical with the described current data volume that can bear or less than and close to the data volume of the described current data volume that can bear, described the 3rd corresponding relation is the corresponding relation between the transmission block size of the data volume that can bear on the high-speed physical downlink shared channel (HS-PDSCH) and recommendation;
The transmission block size of the described corresponding recommendation of data volume that finds out is defined as the transmission block size of current recommendation.
Preferably, described method, wherein, determine the data volume that can bear on the current high-speed physical downlink shared channel (HS-PDSCH) according to following formula:
The data volume of the data volume that can bear on the current high-speed physical downlink shared channel (HS-PDSCH)=one code channel transmission * current is distributed to the timeslot number of high-speed physical downlink shared channel (HS-PDSCH) * current and is distributed to the code channel number that each time slot comprises in the time slot of high-speed physical downlink shared channel (HS-PDSCH) * described definite equivalent encoding rate.
Preferably, described method, wherein, find out the data volume identical with the described current data volume that can bear or less than and behind the finding step close to the data volume of the described current data volume that can bear, also comprise:
If the fall off rate of the signal interference ratio that high-speed physical downlink shared channel (HS-PDSCH) is current surpasses default first rate threshold value, then will be in described the 3rd corresponding relation, compare with the transmission block size of the described corresponding recommendation of data volume that finds out, transmission block that the transmission block size of the recommendation of lower one-level or two-stage is defined as current recommendation is big or small;
If the climbing speed of the signal interference ratio that high-speed physical downlink shared channel (HS-PDSCH) is current surpasses the second default rate-valve value, then will be in described the 3rd corresponding relation, compare with the transmission block size of the described corresponding recommendation of data volume that finds out, transmission block that the transmission block size of the recommendation of higher one-level or two-stage is defined as current recommendation is big or small.
On the other hand, provide a kind of transmission block size of recommendation of time division synchronization and code division multi-address access terminal to determine method, wherein, comprise the steps:
The first corresponding relation is set, and described the first corresponding relation is at the corresponding relation between equivalent encoding rate and the signal interference ratio under previously selected a kind of fixedly timeslot number and the code channel number;
After measuring the current signal interference ratio of high-speed physical downlink shared channel (HS-PDSCH), by the equivalent encoding rate that described the first corresponding relation is determined and described current signal interference ratio is corresponding;
Determine the transmission block size of current recommendation according to the current timeslot number of distributing to high-speed physical downlink shared channel (HS-PDSCH) and code channel number and described definite equivalent encoding rate.
Preferably, described method wherein, describedly at the corresponding relation between equivalent encoding rate and the signal interference ratio under previously selected fixedly timeslot number and the code channel number is:
At the corresponding relation between equivalent encoding rate and the signal interference ratio under code channel of a time slot.
Another aspect provides a kind of time division synchronization and code division multi-address access terminal, wherein, comprising:
Memory module, be used for the first corresponding relation and the second corresponding relation that storage sets in advance, described the first corresponding relation is at the corresponding relation between equivalent encoding rate and the signal interference ratio under previously selected a kind of fixedly timeslot number and the code channel number, the corresponding relation between the modulation system that described the second corresponding relation is signal interference ratio and recommendation;
The signal-to-interference ratio measurement module is used for measuring the current signal interference ratio of high-speed physical downlink shared channel (HS-PDSCH);
The modulation system determination module of recommending is used for the second corresponding relation according to described storage, determines the adjustment modes of the current recommendation corresponding with described current signal interference ratio;
The transmission block size determination module of recommending is used for determining according to the current timeslot number of distributing to high-speed physical downlink shared channel (HS-PDSCH) and code channel number and described definite equivalent encoding rate the transmission block size of current recommendation.
Preferably, described terminal wherein, describedly at the corresponding relation between equivalent encoding rate and the signal interference ratio under previously selected fixedly timeslot number and the code channel number is:
At the corresponding relation between equivalent encoding rate and the signal interference ratio under code channel of a time slot.
Preferably, described terminal, wherein, the transmission block of described recommendation size determination module comprises:
The data volume determination module is used for determining the current data volume that can bear on the high-speed physical downlink shared channel (HS-PDSCH);
Search module, be used for predefined the 3rd corresponding relation find out the data volume identical with the described current data volume that can bear or less than and close to the data volume of the described current data volume that can bear, described the 3rd corresponding relation is the corresponding relation between the transmission block size of the data volume that can bear on the high-speed physical downlink shared channel (HS-PDSCH) and recommendation;
Determination module as a result, be used for will the described corresponding recommendation of data volume that finds out the transmission block size to be defined as the transmission block of current recommendation big or small.
Preferably, described terminal, wherein, described data volume determination module is determined the data volume that can bear on the current high-speed physical downlink shared channel (HS-PDSCH) according to following formula:
The data volume of the data volume that can bear on the current high-speed physical downlink shared channel (HS-PDSCH)=one code channel transmission * current is distributed to the timeslot number of high-speed physical downlink shared channel (HS-PDSCH) * current and is distributed to the code channel number that each time slot comprises in the time slot of high-speed physical downlink shared channel (HS-PDSCH) * described definite equivalent encoding rate.
Preferably, described terminal, wherein, the transmission block of described recommendation size determination module also comprises:
Adjusting module as a result, be used for when the fall off rate of the current signal interference ratio of described high-speed physical downlink shared channel (HS-PDSCH) surpasses default first rate threshold value, the transmission block size of current recommendation is adjusted into transmission block size than the recommendation of the lower one-level of transmission block size of the described corresponding recommendation of data volume that finds out or two-stage; When the climbing speed of the current signal interference ratio of described high-speed physical downlink shared channel (HS-PDSCH) surpasses the second default rate-valve value, the transmission block size of current recommendation is adjusted into transmission block size than the recommendation of the higher one-level of transmission block size of the described corresponding recommendation of data volume that finds out or two-stage.
Technique effect of the present invention is:
The present invention does not directly store SIR in the various physical source distributing situations and the corresponding relation between the RTBS, and directly determine CQI by searching this corresponding relation, but reach by setting in advance the equivalent encoding rate corresponding with previously selected a kind of physical source distributing situation and the corresponding relation between the signal interference ratio, after obtaining encoding rate, determine RTBS according to timeslot number and the code channel number of current distribution again, and and then definite CQI; Utilize technical scheme of the present invention, only the equivalent code check in a kind of physical source distributing situation of need storage and the correspondence table of SIR can be saved a large amount of memory spaces;
Further, owing in technical scheme of the present invention, directly directly not determining RTBS according to pre-stored corresponding relation such as pre-stored table, when reality is determined RTBS, can be according to the operational environment of current reality, corresponding relation to encoding rate and RTBS carries out suitable adjustment, as when the current SIR fast-descending, capable of regulating uses lower RTBS, when current SIR fast rise, capable of regulating uses higher RTBS, thereby make the more variation of adaptive channel of RTBS of determining, increased the flexibility that realizes.
Description of drawings
Fig. 1 is the HS-PDSCH of prior art and the timing diagram of HS-SICH;
Fig. 2 is the HS-PDSCH of prior art and the timing diagram of HS-SCCH;
Fig. 3 is the schematic flow sheet of the channel quality indication processing method of the embodiment of the invention;
Fig. 4 is the schematic flow sheet that the channel quality of the embodiment of the invention is indicated a kind of specific implementation of processing method;
Fig. 5 is that the transmission block size of the recommendation of the embodiment of the invention is determined method;
Fig. 6 is the structural representation of the TD-SCDMA terminal of the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
The inventor find not provide the CQI mapping table under the TD-SCDMA pattern in the agreement 3GPP of TD-SCDMA TS25.224, and structure CQI mapping table is the key link that realizes adaptive modulation and coding function among the HSDPA in realizing process of the present invention.
CQI provides by transmitting the estimated value of the code rate that can maximize the single transmission throughput that HS-PDSCH decoding obtains last time for the base station.The HS-PDSCH resource that CQI reporting requirement reference base station is distributed, but restriction can only not obtain CQI by measuring these HS-PDSCH resources.The reference resources of CQI refers in an independent Transmission Time Interval (TTI, Transmission Time Interval), one group of HS-PDSCH resource that UE receives, and the above is carried a complete transmission block.These resource information base stations can obtain by HS-SICH channel and last the relation to the relative timing between the HS-PDSCH transmission of UE of carrying CQI.CQI comprises two territory: RTBS and RMF, the mapping table in these two territories that UE adopts and base station side HS-SCCH adopt consistent.
The CQI reporting process of prior art is as follows:
UE obtains the resource allocation conditions of next HS-PDSCH by the down control channel HS-SCCH message that receives this user;
UE receives this user's HS-PDSCH, and by the CQI that measures of necessity, the purpose that CQI estimates is exactly to obtain maximum single transmission throughput under BLER is not more than 10% prerequisite;
The CQI report of a corresponding HS-PDSCH, UE should send at subsequently available HS-SICH of HS-PDSCH transmission, unless HS-SICH is being close to last transmission time slot of HS-PDSCH, in this case, UE will use next available HS-SICH to transmit, the CQI that UE always obtains recently in any one HS-SICH transmission.
The inventor is in realizing process of the present invention, discovery is in the TD-SCDMA system, physical source distributing comprises 16 code channel resources and 5 time interval resources, distribute possibility if travel through all resources, then need a large amount of memory spaces, preserve the CQI mapping table that various resources are distributed, for bottom layer realization, greatly increased the realization cost.Therefore, for overcoming the above-mentioned shortcoming of prior art, in the technical scheme of the embodiment of the invention, do not travel through all resources and distribute possibility, but by the CQI mapping table under fixing Resource Allocation Formula of definition, namely define one at fixing timeslot number and the CQI mapping table under the code channel number, the content of this CQI mapping table is an encoding rate sequence, record be corresponding relation between SIR and the equivalent encoding rate, and measure equivalent encoding rate under the various SIR by emulation, be that timeslot number and the code channel number of the current HS-PDSCHD of distributing to calculates RTBS according to the physical resource number of current distribution at last.
The embodiment of the invention provides a kind of channel quality indication processing method of TD-SCDMA terminal.Fig. 3 is the schematic flow sheet of the channel quality indication processing method of the embodiment of the invention.Such as Fig. 3, the method for this embodiment comprises the steps:
Step 301 arranges the first corresponding relation, and described the first corresponding relation is at the corresponding relation between equivalent encoding rate and the signal interference ratio under previously selected fixedly timeslot number and the code channel number;
Step 302, after measuring the current signal interference ratio of high-speed physical downlink shared channel (HS-PDSCH), by the equivalent encoding rate that described the first corresponding relation is determined and described current signal interference ratio is corresponding, and determine and the modulation system of the current recommendation that described current signal interference ratio is corresponding corresponding relation between the modulation system that described the second corresponding relation is signal interference ratio and recommendation according to predefined the second corresponding relation;
Step 303 is determined the transmission block size of current recommendation according to the current timeslot number of distributing to high-speed physical downlink shared channel (HS-PDSCH) and code channel number and described definite equivalent encoding rate.
The method of this embodiment of the invention, determine RTBS by utilizing under previously selected a kind of fixedly timeslot number and the code channel number corresponding relation between the equivalent encoding rate and signal interference ratio, only need encoding rate in a kind of physical source distributing situation of storage and the corresponding relation between the signal interference ratio, and need not to store RTBS under the various resource allocation conditions and the corresponding relation between the signal interference ratio, saved a large amount of memory spaces.
Exemplarily, encoding rate and the corresponding relation between the signal interference ratio in this a kind of physical source distributing situation can draw by the emulation true environment, and be identical or similar with the simulation algorithm that obtains SIR and RTBS corresponding relation in the prior art.
In the method for this embodiment, preferably, corresponding relation under this previously selected fixedly timeslot number and the code channel number between equivalent encoding rate and the signal interference ratio is: the equivalent encoding rate under code channel of a time slot and the corresponding relation between the signal interference ratio, the form that this corresponding relation can be shown exists.
Preferably, determine according to predefined the second corresponding relation and the modulation system of the current recommendation that described current signal interference ratio is corresponding comprises:
Judge whether signal interference ratio reaches default threshold value; In this way, then select a kind of modulation system, such as the 16QAM modulation system; Otherwise, select another kind of modulation system, such as the QPSK modulation system.Exemplarily, this threshold value can be set to 2.5.Certainly, this threshold value need to be revised according to the debug results of reality such as 2.5.In addition, modulation system is not limited to and above-mentioned QPSK modulation system and 16QAM modulation system, also may be the 64QAM modulation system, or the modulation system of high-order more.
Preferably, in the method for this embodiment, determine that the step of the transmission block size of recommendation comprises:
Determine the current data volume that can bear on the high-speed physical downlink shared channel (HS-PDSCH); Exemplarily, can determine the data volume that can bear on the current high-speed physical downlink shared channel (HS-PDSCH) according to following formula:
The data volume of the data volume that can bear on the current high-speed physical downlink shared channel (HS-PDSCH)=one code channel transmission * current is distributed to the timeslot number of high-speed physical downlink shared channel (HS-PDSCH) * current and is distributed to the code channel number that each time slot comprises in the time slot of high-speed physical downlink shared channel (HS-PDSCH) * described definite equivalent encoding rate;
In predefined the 3rd corresponding relation, find out the data volume identical with the described current data volume that can bear or less than and close to the data volume of the described current data volume that can bear, described the 3rd corresponding relation is the corresponding relation between the transmission block size of the data volume that can bear on the high-speed physical downlink shared channel (HS-PDSCH) and recommendation; Exemplarily, the 3rd corresponding relation is the table 9.2.3.3.5 of TD-SCDMA agreement 25.321 media access control protocols explanations (MAC protocol specification, Medium Access Control protocolspecification);
The transmission block size of the described corresponding recommendation of data volume that finds out is defined as the transmission block size of current recommendation.
Preferably, finding out the data volume identical with the described current data volume that can bear, or less than and behind the finding step close to the data volume of the described current data volume that can bear, also can be big or small according to the transmission block that the situation of change adjustment of current signal interference ratio will be recommended, if current signal interference ratio descends rapidly, for example fall off rate surpasses default first rate threshold value, then with in described the 3rd corresponding relation, compare with the transmission block size of the described corresponding recommendation of data volume that finds out, the transmission block size that the transmission block size of the recommendation of lower one-level or two-stage is defined as current recommendation then in the 3rd corresponding relation, is selected the transmission block size than the above-mentioned corresponding recommendation of data volume that finds out; If current signal interference ratio rises rapidly, for example climbing speed surpasses the second default rate-valve value, then will be in described the 3rd corresponding relation, compare with the transmission block size of the described corresponding recommendation of data volume that finds out, transmission block that the transmission block size of the recommendation of higher one-level or two-stage is defined as current recommendation is big or small.
Below by example the CQI of the embodiment of the invention is determined that the specific implementation of method is described in further detail.Such as Fig. 4, the CQI of this embodiment determines that method comprises the steps:
Step 401, UE receives HS-SCCH; Usually UE begins to receive HS-SCCH information after receiving the upper strata instruction;
Step 402, UE resolves the HS-SCCH information that receives, and therefrom obtains the resource allocation conditions of next HS-PDSCH, comprising: the time slot of channel and code channel information;
Step 403, time slot and the code channel information of the HS-PDSCH channel that obtains according to previous step, UE receives the HS-PDSCH channel information;
Step 404, UE decoding HS-PDSCH channel information, and HS-PDSCH carried out sir measurement; The measurement of existing SIR has many methods, exemplarily, can measure according to the symbol before the demodulation, and the measurement of SIR is not content of the present invention, does not do detailed elaboration at this;
Step 405, UE is according to the sir measurement result, search the CQI mapping table that sets in advance according to the embodiment of the invention, namely search the equivalent encoding rate under code channel of a time slot that sets in advance and the corresponding relation between the signal interference ratio SIR, obtain the equivalent encoding rate corresponding with the current SIR that measures; The CQI mapping table that this sets in advance is to obtain by emulation in advance; Table 1 provided in the embodiment of the invention, example by emulation CQI mapping table that obtain, that set in advance and store; As shown in table 1, this mapping table comprises: SIR item and the equivalent encoding rate item corresponding with SIR; This table is corresponding to the resource allocation conditions of a code channel of a time slot, and the content of this table is an encoding rate sequence, and this table is take 0.01 as step-length, be that equivalent encoding rate is take 0.01 as step-length, the value from 0.33 to 1 of equivalence encoding rate, corresponding to SIR approximately from 1 to 24.5dB, totally 112 groups of data, need 112 each memory space, wherein, in this embodiment, the switching point take SIR=2.5dB as RMF, at this switching point encoding rate individual saltus step is arranged, from 0.88 to 0.45.And determine method according to the CQI of prior art, all physical source distributing situations are namely related to the situation in totally 80 of 5 time slots, 16 code channels of each time slot, take 0.5dB as step-length (being that SIR is take 0.5dB as step-length), the SIR value is from 0 to 25dB, corresponding RTBS just needs 50 * 80=4000 memory space; So by contrast, the method for the embodiment of the invention can be saved memory space greatly;
Signal interference ratio SIR The equivalence encoding rate
1.0123 0.33333
1.0147 0.34
... ...
2.3312 0.86
2.4195 0.87
2.5078 0.88
2.5073 0.45
... ...
22.303 0.99
24.136 1
Table 1
Step 406, according to checking result, and current physical source distributing situation, namely current timeslot number and the code channel number of distributing to HS-PDSCH calculates RTBS, and determines RMF according to the SIR that measures, thereby determine CQI; In practice, can be 2.5 with the threshold value setting of determining modulation system, if the SIR that measures less than 2.5, then adopts the QPSK modulation system, otherwise, adopt the 16QAM modulation system; For example, current physical source distributing situation is 3 time slots, 10 code channels of each time slot, and the SIR of measurement is 2.4, then obtaining encoding rate by tabling look-up is 0.87, because SIR is less than 2.5, modulation system is QPSK,
In this example, RTBS=88 * 10 * 3 * 0.87=2296.8, wherein, 88 is the data volume of a code channel transmission, and 10 give the code channel number of each time slot, and 3 is timeslot number, and 0.87 is definite equivalent encoding rate; According to the table 9.2.3.3.5 of TD-SCDMA agreement 25.321,2296.8 are between the 35th value 2236 and the 36th value 2238, get lower value, thus RTBS=35, thus determined CQI.
Preferably, can also according to the actual conditions of current channel, neatly RTBS be adjusted.As, SIR descends very fast, can choose the RTBS of lower one-level or two-stage, and is very fast if SIR descends in this embodiment, then can choose RTBS=34 or 33; If SIR raises rapidly, can choose the RTBS of higher one-level or two-stage, in this embodiment, if SIR raises rapidly, then can choose RTBS=36 or 37, with the better variation of adaptive channel.
The transmission block size that the embodiment of the invention also discloses a kind of recommendation of time division synchronization and code division multi-address access terminal is determined method.Such as Fig. 5, the transmission block of the recommendation of this embodiment size determines that method comprises the steps:
Step 501 arranges the first corresponding relation, and described the first corresponding relation is at the corresponding relation between equivalent encoding rate and the signal interference ratio under previously selected a kind of fixedly timeslot number and the code channel number;
Step 502 is after measuring the current signal interference ratio of high-speed physical downlink shared channel (HS-PDSCH), by the equivalent encoding rate that described the first corresponding relation is determined and described current signal interference ratio is corresponding;
Step 503 is determined the transmission block size of current recommendation according to the current timeslot number of distributing to high-speed physical downlink shared channel (HS-PDSCH) and code channel number and described definite equivalent encoding rate.
Preferably, described method wherein, describedly at the corresponding relation between equivalent encoding rate and the signal interference ratio under previously selected fixedly timeslot number and the code channel number is: at the corresponding relation between equivalent encoding rate and the signal interference ratio under code channel of a time slot.
RTBS is the part of CQI, and the definite method of the RTBS in definite method of the RTBS of this embodiment and the definite method of above-mentioned CQI is similar, and other preferred embodiment is also similar, does not repeat them here.
The embodiment of the invention also discloses a kind of time division synchronization and code division multi-address access terminal.Such as Fig. 6, the terminal 600 of this embodiment is that user equipment (UE) comprises: memory module 601, be used for the first corresponding relation and the second corresponding relation that storage sets in advance, described the first corresponding relation is at the corresponding relation between equivalent encoding rate and the signal interference ratio under previously selected a kind of fixedly timeslot number and the code channel number, the corresponding relation between the modulation system that described the second corresponding relation is signal interference ratio and recommendation; Signal-to-interference ratio measurement module 602 is used for measuring the current signal interference ratio of high-speed physical downlink shared channel (HS-PDSCH); The modulation system determination module 603 of recommending is used for the second corresponding relation according to described storage, determines the adjustment modes of the current recommendation corresponding with described current signal interference ratio; The transmission block size determination module 604 of recommending is used for determining according to the current timeslot number of distributing to high-speed physical downlink shared channel (HS-PDSCH) and code channel number and described definite equivalent encoding rate the transmission block size of current recommendation.
Preferably, described terminal wherein, describedly at the corresponding relation between equivalent encoding rate and the signal interference ratio under previously selected fixedly timeslot number and the code channel number is: at the corresponding relation between equivalent encoding rate and the signal interference ratio under code channel of a time slot.
Preferably, described terminal, wherein, the transmission block of described recommendation size determination module comprises:
The data volume determination module is used for determining the current data volume that can bear on the high-speed physical downlink shared channel (HS-PDSCH);
Search module, be used for predefined the 3rd corresponding relation find out the data volume identical with the described current data volume that can bear or less than and close to the data volume of the described current data volume that can bear, described the 3rd corresponding relation is the corresponding relation between the transmission block size of the data volume that can bear on the high-speed physical downlink shared channel (HS-PDSCH) and recommendation;
Determination module as a result, be used for will the described corresponding recommendation of data volume that finds out the transmission block size to be defined as the transmission block of current recommendation big or small.
Preferably, described terminal, wherein, described data volume determination module is determined the data volume that can bear on the current high-speed physical downlink shared channel (HS-PDSCH) according to following formula:
The data volume of the data volume that can bear on the current high-speed physical downlink shared channel (HS-PDSCH)=one code channel transmission * current is distributed to the timeslot number of high-speed physical downlink shared channel (HS-PDSCH) * current and is distributed to the code channel number that each time slot comprises in the time slot of high-speed physical downlink shared channel (HS-PDSCH) * described definite equivalent encoding rate.
Preferably, described terminal, wherein, the transmission block of described recommendation size determination module also comprises:
Adjusting module as a result, be used for when the fall off rate of the current signal interference ratio of described high-speed physical downlink shared channel (HS-PDSCH) surpasses default first rate threshold value, the transmission block size of current recommendation is adjusted into transmission block size than the recommendation of the lower one-level of transmission block size of the described corresponding recommendation of data volume that finds out or two-stage; When the climbing speed of the current signal interference ratio of described high-speed physical downlink shared channel (HS-PDSCH) surpasses the second default rate-valve value, the transmission block size of current recommendation is adjusted into transmission block size than the recommendation of the higher one-level of transmission block size of the described corresponding recommendation of data volume that finds out or two-stage.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (8)

1.一种时分同步码分多址接入终端的信道质量指示确定方法，所述信道质量指示包括推荐的传输块大小和推荐的调制方式，其特征在于，包括如下步骤：1. A method for determining channel quality indication of a time division synchronous code division multiple access terminal, said channel quality indication comprises recommended transport block size and recommended modulation scheme, characterized in that, comprising the steps of: 设置第一对应关系，所述第一对应关系为在预先选定的一种固定时隙数和码道数下等效编码率与信干比之间的对应关系；Setting the first correspondence, the first correspondence is the correspondence between the equivalent coding rate and the signal-to-interference ratio under a pre-selected fixed number of time slots and code channels; 在测量出高速物理下行共享信道当前的信干比后，通过所述第一对应关系确定与所述当前的信干比相对应的等效编码率，并根据预先设定的第二对应关系确定与所述当前的信干比相对应的当前推荐的调制方式，所述第二对应关系为信干比与推荐的调制方式之间的对应关系；After measuring the current signal-to-interference ratio of the high-speed physical downlink shared channel, determine the equivalent coding rate corresponding to the current signal-to-interference ratio through the first correspondence, and determine it according to the preset second correspondence A currently recommended modulation scheme corresponding to the current signal-to-interference ratio, and the second correspondence is a correspondence between the signal-to-interference ratio and the recommended modulation scheme; 根据当前分配给高速物理下行共享信道的时隙数和码道数、以及所述确定的等效编码率，确定高速物理下行共享信道上当前能够承受的数据量；According to the number of time slots and the number of code channels currently assigned to the high-speed physical downlink shared channel, and the determined equivalent coding rate, determine the amount of data that can currently be tolerated on the high-speed physical downlink shared channel; 在预先设定的第三对应关系中查找出与所述当前能够承受的数据量相同的数据量、或小于且最接近于所述当前能够承受的数据量的数据量，所述第三对应关系为高速物理下行共享信道上能够承受的数据量与推荐的传输块大小之间的对应关系；Find the same data volume as the current tolerable data volume, or a data volume that is smaller than and closest to the current tolerable data volume in the preset third correspondence relationship, the third correspondence relationship The corresponding relationship between the amount of data that can be tolerated on the high-speed physical downlink shared channel and the recommended transmission block size; 将所述查找出的数据量所对应的推荐的传输块大小确定为当前推荐的传输块大小。The recommended transmission block size corresponding to the found data amount is determined as the currently recommended transmission block size. 2.根据权利要求1所述的方法，其特征在于，所述在预先选定的固定时隙数和码道数下等效编码率与信干比之间的对应关系为：2. The method according to claim 1, characterized in that, the correspondence between the equivalent coding rate and the signal-to-interference ratio under the pre-selected fixed number of time slots and the number of code channels is: 在一个时隙一个码道下等效编码率与信干比之间的对应关系。Correspondence between equivalent coding rate and signal-to-interference ratio in one time slot and one code channel. 3.根据权利要求1所述的方法，其特征在于，根据如下公式确定当前高速物理下行共享信道上能够承受的数据量：3. The method according to claim 1, wherein the amount of data that can be tolerated on the current high-speed physical downlink shared channel is determined according to the following formula: 当前高速物理下行共享信道上能够承受的数据量＝一个码道传输的数据量×当前分配给高速物理下行共享信道的时隙数×当前分配给高速物理下行共享信道的时隙中每一个时隙包含的码道数×所述确定的等效编码率。The amount of data that can be tolerated on the current high-speed physical downlink shared channel = the amount of data transmitted by one code channel × the number of time slots currently allocated to the high-speed physical downlink shared channel × each time slot in the time slots currently allocated to the high-speed physical downlink shared channel The number of included code channels × the determined equivalent coding rate. 4.根据权利要求1或3所述的方法，其特征在于，在查找出与所述当前能够承受的数据量相同的数据量、或小于且最接近于所述当前能够承受的数据量的数据量的查找步骤后，还包括：4. The method according to claim 1 or 3, characterized in that, after finding out the same amount of data as the current amount of data that can be tolerated, or the data that is less than and closest to the amount of data that is currently tolerable After the lookup step of the amount, also include: 如果高速物理下行共享信道当前的信干比的下降速率超过预设的第一速率阈值，则将所述第三对应关系中、与所述查找出的数据量所对应的推荐的传输块大小相比、更低一级或两级的推荐的传输块大小确定为当前的推荐的传输块大小；If the decrease rate of the current signal-to-interference ratio of the high-speed physical downlink shared channel exceeds the preset first rate threshold, the recommended transport block size corresponding to the found data amount in the third correspondence relationship is compared to The recommended transport block size one or two levels lower than , is determined as the current recommended transport block size; 如果高速物理下行共享信道当前的信干比的上升速率超过预设的第二速率阈值，则将所述第三对应关系中、与所述查找出的数据量所对应的推荐的传输块大小相比、更高一级或两级的推荐的传输块大小确定为当前的推荐的传输块大小。If the rising rate of the current signal-to-interference ratio of the high-speed physical downlink shared channel exceeds the preset second rate threshold, the recommended transport block size corresponding to the found data amount in the third correspondence relationship is compared to The recommended transport block size one or two levels higher than , is determined as the current recommended transport block size. 5.一种时分同步码分多址接入终端的推荐的传输块大小确定方法，其特征在于，包括如下步骤：5. A method for determining the recommended transport block size of a time division synchronous code division multiple access terminal, characterized in that, comprising the steps: 设置第一对应关系，所述第一对应关系为在预先选定的一种固定时隙数和码道数下等效编码率与信干比之间的对应关系；Setting the first correspondence, the first correspondence is the correspondence between the equivalent coding rate and the signal-to-interference ratio under a pre-selected fixed number of time slots and code channels; 在测量出高速物理下行共享信道当前的信干比后，通过所述第一对应关系确定与所述当前的信干比相对应的等效编码率；After measuring the current signal-to-interference ratio of the high-speed physical downlink shared channel, determine the equivalent coding rate corresponding to the current signal-to-interference ratio through the first correspondence; 根据当前分配给高速物理下行共享信道的时隙数和码道数、以及所述确定的等效编码率，确定高速物理下行共享信道上当前能够承受的数据量；According to the number of time slots and the number of code channels currently assigned to the high-speed physical downlink shared channel, and the determined equivalent coding rate, determine the amount of data that can currently be tolerated on the high-speed physical downlink shared channel; 在预先设定的第三对应关系中查找出与所述当前能够承受的数据量相同的数据量、或小于且最接近于所述当前能够承受的数据量的数据量，所述第三对应关系为高速物理下行共享信道上能够承受的数据量与推荐的传输块大小之间的对应关系；Find the same data volume as the current tolerable data volume, or a data volume that is smaller than and closest to the current tolerable data volume in the preset third correspondence relationship, the third correspondence relationship The corresponding relationship between the amount of data that can be tolerated on the high-speed physical downlink shared channel and the recommended transport block size; 将所述查找出的数据量所对应的推荐的传输块大小确定为当前推荐的传输块大小。The recommended transmission block size corresponding to the found data amount is determined as the currently recommended transmission block size. 6.一种时分同步码分多址接入终端，其特征在于，包括：6. A time division synchronous code division multiple access terminal, characterized in that it comprises: 存储模块，用于存储预先设置的第一对应关系和第二对应关系，所述第一对应关系为在预先选定的一种固定时隙数和码道数下等效编码率与信干比之间的对应关系，所述第二对应关系为信干比与推荐的调制方式之间的对应关系；A storage module, configured to store a preset first correspondence and a second correspondence, the first correspondence being the ratio between the equivalent coding rate and the signal-to-interference ratio under a pre-selected fixed number of time slots and code channels The corresponding relationship between, the second corresponding relationship is the corresponding relationship between the signal-to-interference ratio and the recommended modulation mode; 信干比测量模块，用于测量高速物理下行共享信道当前的信干比；The signal-to-interference ratio measurement module is used to measure the current signal-to-interference ratio of the high-speed physical downlink shared channel; 推荐的调制方式确定模块，用于根据所述存储的第二对应关系，确定出与所述当前的信干比相对应的当前推荐的调整模式；A recommended modulation mode determination module, configured to determine a currently recommended adjustment mode corresponding to the current signal-to-interference ratio according to the stored second correspondence; 推荐的传输块大小确定模块，包括数据量确定模块、查找模块和结果确定模块；其中，根据当前分配给高速物理下行共享信道的时隙数和码道数、以及所述确定的等效编码率；The recommended transmission block size determination module includes a data volume determination module, a search module and a result determination module; wherein, according to the number of time slots and code channels currently allocated to the high-speed physical downlink shared channel, and the determined equivalent coding rate ; 数据量确定模块，用于确定高速物理下行共享信道上当前能够承受的数据量；A data volume determination module, configured to determine the currently bearable data volume on the high-speed physical downlink shared channel; 查找模块，用于在预先设定的第三对应关系中查找出与所述当前能够承受的数据量相同的数据量、或小于且最接近于所述当前能够承受的数据量的数据量，所述第三对应关系为高速物理下行共享信道上能够承受的数据量与推荐的传输块大小之间的对应关系；A search module, configured to find the same amount of data as the currently tolerable data amount, or a data amount that is smaller than and closest to the current tolerable data amount in the preset third corresponding relationship, so The third corresponding relationship is the corresponding relationship between the amount of data that can be tolerated on the high-speed physical downlink shared channel and the recommended transmission block size; 结果确定模块，用于将所述查找出的数据量所对应的推荐的传输块大小确定为当前推荐的传输块大小。The result determination module is configured to determine the recommended transmission block size corresponding to the found data amount as the currently recommended transmission block size. 7.根据权利要求6所述的终端，其特征在于，所述在预先选定的固定时隙数和码道数下等效编码率与信干比之间的对应关系为：7. The terminal according to claim 6, characterized in that, the correspondence between the equivalent coding rate and the signal-to-interference ratio under the pre-selected fixed number of time slots and code channels is: 在一个时隙一个码道下等效编码率与信干比之间的对应关系。Correspondence between equivalent coding rate and signal-to-interference ratio in one time slot and one code channel. 8.根据权利要求6所述的终端，其特征在于，所述推荐的传输块大小确定模块还包括：8. The terminal according to claim 6, wherein the recommended transmission block size determination module further comprises: 结果调整模块，用于在所述高速物理下行共享信道当前的信干比的下降速率超过预设的第一速率阈值时，将当前的推荐的传输块大小调整为比所述查找出的数据量所对应的推荐的传输块大小更低一级或两级的推荐的传输块大小；在所述高速物理下行共享信道当前的信干比的上升速率超过预设的第二速率阈值时，将当前的推荐的传输块大小调整为比所述查找出的数据量所对应的推荐的传输块大小更高一级或两级的推荐的传输块大小。A result adjustment module, configured to adjust the current recommended transport block size to be smaller than the found data amount when the current SIR decline rate of the high-speed physical downlink shared channel exceeds a preset first rate threshold The corresponding recommended transport block size is one or two levels lower than the recommended transport block size; when the current signal-to-interference ratio increase rate of the high-speed physical downlink shared channel exceeds the preset second rate threshold, the current The recommended transport block size is adjusted to a recommended transport block size that is one or two levels higher than the recommended transport block size corresponding to the found data amount.
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