CN102904670A - Device and method for obtaining channel quality indicator, mobile terminal and communication system - Google Patents
Device and method for obtaining channel quality indicator, mobile terminal and communication system Download PDFInfo
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Abstract
The invention provides a device for obtaining a channel quality indicator which includes the reported transport block size and a reported modulation mode. The device for obtaining the channel quality indicator comprises a block error rate determination unit, a coding rate determination unit, a modulation mode determination unit and a transmission block determination unit, wherein the block error rate determination unit is suitable for obtaining the block error rate in at least one time window which refers to a preset time before starting receiving a transmission block of a downlink channel; the coding rate determination unit is suitable for obtaining the reported coding rate CR based on the current coding rate CR' when a received verification result of the transmission block and the block error rate in the time windows satisfy preset conditions; the modulation mode determination unit is suitable for obtaining the reported modulation mode of the reported coding rate; and the transmission block determination unit is suitable for obtaining the reported TBS (transport block size) on the basis of an RU (resource unit), the reported coding rate and the reported modulation mode. By the technical scheme, an accurate CQI (channel quality indicator) can be obtained in a complex environment, particularly in a fading channel, and the device is simple in implementation mode and easy to use.
Description
Technical field
The present invention relates to mobile communication technology, particularly a kind of device and method, portable terminal, communication system of obtaining the channel quality indication.
Background technology
Link adaptation is high speed downlink packet access (High-Speed Downlink Packet Access, HSDPA) improve a kind of important channel of data throughout, what adopt is adaptive modulation and coding (Adaptive Modulation and Coding, AMC) technology.The AMC technology can be in each user's transmission course, Modulation and Coding Scheme and the average channel conditions of system are complementary, keep the signal power of transmission constant during period of sub-frame, change modulation system and code check, to be complementary with the current signal quality of receiving or signal conditioning.Usually, for the base station higher high order modulation of mobile terminal configuration code check in the neighbourhood, as to adopt effective code check be 0.8 16 rank quadrature amplitude modulation (16Quadrature Amplitude Modulation, 16QAM) and 3/4Turbo coding.Along with the distance of distance base station increases, modulation order and code check will descend, as to adopt effective code check be that 0.5 orthogonal PSK (Quadrature Phase Shift Keying, QPSK) and 1/3Turbo encode.
In order to realize AMC, user terminal (User Equipment, UE) need to measure channel quality condition by some and change code check and modulation system.Channel quality indication (Channel Quality Indicator, CQI) can provide for base station (Node B) estimated value of the code check that can maximize the single transmission throughput that obtains by transmitting high speed down shared channel last time (High Speed Downlink Shared Channel, HS-DSCH) decoding.Publication number is that the european patent application of EP1842307 discloses the technical scheme based on the HSDPA parameter adjustment in CQI period.
CQI comprises two territories: transmission block size and modulation system.UE reports process roughly as follows:
UE obtains the resource allocation conditions of next HS-DSCH by down control channel (Shared Control Channel for HS-DSCH, the HS-SCCH) message that receives this user;
UE receives this user's HS-DSCH, by the CQI that measures of necessity;
The CQI report of a corresponding HS-DSCH, UE sends in a subsequently available uplink information channel (Shared Information Channel for HS-DSCH, the HS-SICH) carrying of HS-DSCH transmission.
The implementation method that a kind of CQI of obtaining is arranged in the prior art: receive channel quality picked up signal and interference and the noise ratio (Signal to Interference plus Noise Ratio, SINR) current according to UE; Be mapped to CQI according to SINR, and CQI is fed back to Node B.Node B issues the resource of UE according to CQI.
But, under fading channel, be difficult to accurately estimate SINR, thereby cause the CQI that obtains according to SINR inaccurate.
Summary of the invention
What technical solution of the present invention solved is the inaccurate problem of CQI that prior art is obtained under fading channel.
Technical solution of the present invention provides a kind of device that obtains the channel quality indication, and described channel quality indication comprises the transmission block size that reports and the modulation system that reports, and comprising:
The Block Error Rate determining unit is suitable for obtaining the Block Error Rate at least one time window, and described time window is the front scheduled time of transmission block that begins to receive down channel;
The code check determining unit is suitable for satisfying when pre-conditioned the code check CR that reports based on current code check CR ' acquisition at least at the check results of the transmission block that receives and the Block Error Rate in the described time window;
The modulation system determining unit is suitable for the modulation system that reports based on the described code check acquisition that reports;
The transmission block determining unit is suitable for obtaining the transmission block size TBS that reports based on Resource Unit RU, the described code check that reports and the modulation system that reports.
Optionally, described down channel comprises HS-DSCH.
Optionally, described current code check or described Resource Unit obtain from the control information of down control channel carrying.
Optionally, described modulation system determining unit is suitable for obtaining the described modulation system that reports by inquiry code check and modulation system corresponding relation.
Optionally, described CR=TBS/RU/ ((modmode+1)/Bits), wherein, modmode=0 when the described modulation system that reports is QPSK, modmode=1 when the described modulation system that reports is 16QAM, modmode=2 when the described modulation system that reports is 64QAM, Bits are the bit number of a Resource Unit.
Optionally, describedly pre-conditionedly be: the Block Error Rate in the correct and described time window of described transmission block verification is greater than first threshold; The * BLER*a1 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a1 ∈ [0,1].
Optionally, describedly pre-conditionedly be: the Block Error Rate in the correct and described time window of described transmission block verification is less than or equal to first threshold; The * a2 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, a2 ∈ [0,1].
Optionally, describedly pre-conditionedly be: the Block Error Rate in described transmission block check errors and the described time window is greater than first threshold; Described CR=CR '-nCR* (1-BLER) * a3, wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a3 ∈ [0,1].
Optionally, describedly pre-conditionedly be: the Block Error Rate in described transmission block check errors and the described time window is less than or equal to first threshold; Described CR=CR '-nCR* (1-BLER) * a4, wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a4 ∈ [0,1].
Optionally, described first threshold ∈ [0,1].
Optionally, described time window comprises very first time window and the second time window, and described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in correct, the described very first time window of described transmission block verification greater than the Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; The * BLERshort*b1 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b1 ∈ [0,1].
Optionally, described time window comprises very first time window and the second time window, and described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate that the Block Error Rate in correct, the described very first time window of described transmission block verification is less than or equal in Second Threshold and the second time window is less than or equal to the 3rd threshold value; The * b2 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, b2 ∈ [0,1].
Optionally, described time window comprises very first time window and the second time window, and described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in described transmission block check errors, the described very first time window greater than the Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; Described CR=CR '-nCR* (1-BLERshort) * b3, wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b3 ∈ [0,1].
Optionally, described time window comprises very first time window and the second time window, and described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate that the Block Error Rate in described transmission block check errors, the described very first time window is less than or equal in Second Threshold and the second time window is less than or equal to the 3rd threshold value; Described CR=CR '-nCR* (1-BLERshort) * b4, wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b4 ∈ [0,1].
Optionally, described time window comprises very first time window and the second time window, and described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in correct, the described very first time window of described transmission block verification is less than or equal to the 3rd threshold value greater than the Block Error Rate in Second Threshold and the second time window, or the Block Error Rate in the described very first time window is less than or equal to Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; The * BLERshort*b5 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b5 ∈ [0,1].
Optionally, described time window comprises very first time window and the second time window, and described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in described transmission block check errors, the described very first time window is less than or equal to the 3rd threshold value greater than the Block Error Rate in Second Threshold and the second time window, or the Block Error Rate in the described very first time window is less than or equal to Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; Described CR=CR '-nCR*b6, wherein, nCR is the code check fiducial value, b6 ∈ [0,1].
Optionally, described Second Threshold is ∈ [0,1], and described the 3rd threshold value is ∈ [0,1].
Optionally, described very first time window is 80ms, and described the second time window is 160ms.
Optionally, described nCR is normalized to the code check of 16QAM modulation system.
Optionally, described nCR=TBS '/RU/176, wherein, and the transmission block size of described TBS ' for receiving, the described transmission block size that receives and described Resource Unit obtain from the control information of down control channel carrying.
Technical solution of the present invention also provides a kind of portable terminal, comprises the above-mentioned device that obtains the channel quality indication.
Technical solution of the present invention also provides a kind of communication system, comprises above-mentioned portable terminal.
The present invention provides again a kind of method of obtaining the channel quality indication, and described channel quality indication comprises the transmission block size that reports and the modulation system that reports, and comprising:
Obtain the Block Error Rate at least one time window, described time window is the front scheduled time of transmission block that begins to receive down channel;
Satisfy when pre-conditioned the code check CR that reports based on current code check CR ' acquisition at least at the check results of the transmission block that receives and the Block Error Rate in the described time window;
Obtain the modulation system that reports based on the described code check that reports;
Obtain the transmission block size TBS that reports based on Resource Unit RU, the described code check that reports and the modulation system that reports.
Compared with prior art, encoding rate and modulation system that the acquisitions such as the Block Error Rate in the technical solution of the present invention time-based window, the check results of transmission block, current code check and Resource Unit report, under complex environment especially fading channel, can obtain accurately CQI, and implementation is simple and easy to use.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the present invention's device of obtaining channel quality indication;
Fig. 2 is time window schematic diagram of the present invention;
Fig. 3 is the flow chart of an embodiment of the present invention's method of obtaining channel quality indication.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.In the following passage, with way of example the present invention is described more specifically with reference to accompanying drawing.According to following explanation, advantages and features of the invention will be clearer.
Following explaining for part noun in the present techniques scheme:
Block Error Rate (Block Error Rate, BLER) refers to: the transmission block error rate in the scheduled time on the transmission channel.The transmission block error rate refers to: transmission block is carried out verification, for example the error probability after the CRC check.
Transmission block size (Transport Block Size, TBS) depends on the HS-DSCH ability rating of UE with the mapping relations of transport format resource indication (Transport Format Resource Indicator, TFRI) value.The unit of transmission block size is bit (bit).Content about the transmission block size can be with reference to 3GPP agreement TS 25.321,9.2.3.3.
Code check (Coding Rate, CR) refers to code rate.
Resource Unit (Resource Unit, RU) is also referred to as the code block resource, and particular content can be with reference to 3GPP protocol technology report 3GPP TR 25.928.
Relation between transmission block size, code check, Resource Unit and the modulation system satisfies: CR=TBS/RU/ (modmode+1)/Bits, wherein, modmode=0 when modulation system is QPSK, modmode=1 when modulation system is 16QAM, modmode=2 when modulation system is 64QAM, Bits are the bit number of a Resource Unit.
In an embodiment of the present invention, as shown in Figure 1, the device that obtains the channel quality indication comprises: Block Error Rate determining unit 1, be suitable for obtaining the Block Error Rate at least one time window, and described time window is the front scheduled time of transmission block that begins to receive down channel; Code check determining unit 2 is suitable for satisfying when pre-conditioned the code check CR that reports based on current code check CR ' acquisition at least at the check results of the transmission block that receives and the Block Error Rate in the described time window; Modulation system determining unit 3 is suitable for the modulation system that reports based on the described code check acquisition that reports; Transmission block determining unit 4 is suitable for obtaining the transmission block size TBS that reports based on Resource Unit RU, the described code check that reports and the modulation system that reports; Described channel quality indication comprises the transmission block size that reports and the modulation system that reports.
Implication below by the further interpretation time window of giving an example.
As shown in Figure 2, t1 is the time point that begins to receive a transmission block of down channel, and t2 and t3 are the time point that begins to receive before this transmission block.Time window is to calculate forward from the time point that begins to receive transmission block, so, time window can be t2 to the time T 1 between the t1, also can be t3 to the time T 2 between the t1, but not t3 is to the time T 3 between the t2.
The minimum value of time window can be the transmission time interval (Transmission Time Interval, TTI) of Traffic Channel, and maximum occurrences can be the dispatching cycle of Traffic Channel.For example, Traffic Channel is HS-DSCH, and described time window is 80ms or 160ms.
Block Error Rate determining unit 1 is obtained one, the Block Error Rate of two or more time windows.Continuation is with reference to figure 2, and the Block Error Rate of Block Error Rate determining unit 1 in can acquisition time T1 also can acquisition time T1 and the Block Error Rate of time T 2.For example, Block Error Rate determining unit 1 can the acquisition time window be the Block Error Rate of 80ms, also can obtain the Block Error Rate in two time windows of 80ms and 160ms.
Code check determining unit 2 can satisfy when pre-conditioned at the check results of the transmission block that receives and the Block Error Rate in the described time window, the code check CR that reports based on current code check CR ' acquisition, perhaps, the code check CR that acquisition reports based on the Block Error Rate in current code check CR ' and the described time window.
When Block Error Rate determining unit 1 was obtained the Block Error Rate of a time window, code check determining unit 2 can have following several situation:
Pre-conditionedly be: the Block Error Rate in the correct and described time window of described transmission block verification is greater than first threshold; The * BLER*a1 of CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a1 ∈ [0,1].
Pre-conditionedly be: the Block Error Rate in the correct and described time window of described transmission block verification is less than or equal to first threshold; The * a2 of CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, a2 ∈ [0,1].
Pre-conditionedly be: the Block Error Rate in described transmission block check errors and the described time window is greater than first threshold; CR=CR '-nCR* (1-BLER) * a3, wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a3 ∈ [0,1].
Pre-conditionedly be: the Block Error Rate in described transmission block check errors and the described time window is less than or equal to first threshold; CR=CR '-nCR* (1-BLER) * a4, wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a4 ∈ [0,1].
Described first threshold can be according to the Traffic Channel under the dynamic channel, and for example the simulation result of the HS-DSCH throughput of TD-SCDMA is determined.First threshold ∈ [0,1], for example 0.375 or 0.1.
The value of a1-a4 in the above-mentioned formula can be determined according to the simulation result under the different fade condition.Generally speaking, the value of a1-a4 is relevant with the size of BLER.BLER is larger, and the value of a1-a4 is less, and BLER is less, and the value of a1-a4 is larger.For example, a1=1/64, a2=1/32, a3=1/16, a4=1/4.
NCR in the above-mentioned formula can be normalized to the code check of 16QAM modulation system.The value of nCR can be according to formula: nCR=TBS '/RU/176, and wherein, TBS ' is big or small for the transmission block that receives.The value of TBS ' and RU can be from down control channel, and for example the control information of the HS-SCCH of TD-SCDMA carrying obtains.
The value of CR ' can be from down control channel in the above-mentioned formula, and for example the control information of the HS-SCCH of TD-SCDMA carrying obtains.
Block Error Rate determining unit 1 is obtained the Block Error Rate of very first time window and the second time window, and described very first time window is less than described the second time window, and under this condition, code check determining unit 2 can have following several situation:
Pre-conditionedly be: the Block Error Rate in correct, the described very first time window of described transmission block verification greater than the Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; The * BLERshort*b1 of CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b1 ∈ [0,1].
Pre-conditionedly be: the Block Error Rate that the Block Error Rate in correct, the described very first time window of described transmission block verification is less than or equal in Second Threshold and the second time window is less than or equal to the 3rd threshold value; The * b2 of CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, b2 ∈ [0,1].
Pre-conditionedly be: the Block Error Rate in described transmission block check errors, the described very first time window greater than the Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; CR=CR '-nCR* (1-BLERshort) * b3, wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b3 ∈ [0,1].
Pre-conditionedly be: the Block Error Rate that the Block Error Rate in described transmission block check errors, the described very first time window is less than or equal in Second Threshold and the second time window is less than or equal to the 3rd threshold value; CR=CR '-nCR* (1-BLERshort) * b4, wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b4 ∈ [0,1].
Pre-conditionedly be: the Block Error Rate in correct, the described very first time window of described transmission block verification is less than or equal to the 3rd threshold value greater than the Block Error Rate in Second Threshold and the second time window; The * BLERshort*b5 of CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b5 ∈ [0,1].
Pre-conditionedly be: the Block Error Rate in correct, the described very first time window of described transmission block verification is less than or equal to Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; The * BLERshort*b6 of CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b6 ∈ [0,1].
Pre-conditionedly be: the Block Error Rate in described transmission block check errors, the described very first time window is less than or equal to the 3rd threshold value greater than the Block Error Rate in Second Threshold and the second time window; CR=CR '-nCR*b6, wherein, nCR is the code check fiducial value, b6 ∈ [0,1].
Pre-conditionedly be: the Block Error Rate in described transmission block check errors, the described very first time window is less than or equal to Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; CR=CR '-nCR*b6, wherein, nCR is the code check fiducial value, b6 ∈ [0,1].
Described Second Threshold and the 3rd threshold value can be according to the Traffic Channels under the dynamic channel, and for example the simulation result of the HS-DSCH throughput of TD-SCDMA is determined.Second Threshold ∈ [0,1], the 3rd threshold value ∈ [0,1].For example, Second Threshold is that 0.375, the three threshold value is 0.1.
The value of b1-b6 in the above-mentioned formula can be determined according to the simulation result under the different fade condition.Generally speaking, the value of b1-b6 is relevant with the size of BLER.BLER is larger, and the value of b1-b6 is less, and BLER is less, and the value of b1-b6 is larger.NCR in the formula can be normalized to the code check of 16QAM modulation system.For example, b1=1/64, b2=1/32, b3=1/16, b4=1/4, b5=1/4, b6=1/8.
The value of nCR can be according to formula: nCR=TBS '/RU/176 in the above-mentioned formula, and wherein, TBS ' is big or small for the transmission block that receives.The value of TBS ' and RU can be from down control channel, and for example the control information of the HS-SCCH of TD-SCDMA carrying obtains.
The value of CR ' can be from down control channel in the above-mentioned formula, and for example the control information of the HS-SCCH of TD-SCDMA carrying obtains.
Block Error Rate determining unit 1 can also be obtained the Block Error Rate of three or three above time windows, and the error rate of code check determining unit 2 in these time windows satisfies when pre-conditioned, obtains the code check that reports based on current code check at least.The formula that code check determining unit 2 is processed based on the Block Error Rate of three or three above time windows can not be enumerated herein one by one, but those skilled in the art are under the instruction of above-described embodiment, can obtain by emulation, can retrain CQI by time window in theory and adjust step-length.
Modulation system determining unit 3 can obtain the described modulation system that reports by inquiry code check and modulation system corresponding relation.For example, modulation system determining unit 3 obtains the modulation system that reports by question blank 1.
Table 1
| Modulation system | Code check |
| QPSK | 0.35 |
| QPSK | 0.37 |
| QPSK | 0.40 |
| QPSK | 0.42 |
| QPSK | 0.45 |
| QPSK | 0.48 |
| QPSK | 0.51 |
| QPSK | 0.55 |
| QPSK | 0.59 |
| QPSK | 0.63 |
| QPSK | 0.67 |
| QPSK | 0.71 |
| 16QAM | 0.38 |
| 16QAM | 0.41 |
| 16QAM | 0.44 |
| 16QAM | 0.47 |
| 16QAM | 0.50 |
| 16QAM | 0.53 |
| 16QAM | 0.57 |
| 16QAM | 0.60 |
| 16QAM | 0.64 |
| 16QAM | 0.69 |
| 16QAM | 0.74 |
| 16QAM | 0.79 |
| 16QAM | 0.84 |
| 64QAM | 0.6 |
| 64QAM | 0.65 |
| 64QAM | 0.7 |
| 64QAM | 0.75 |
| 64QAM | 0.8 |
| 64QAM | 0.85 |
| 64QAM | 0.9 |
| 64QAM | 0.95 |
| 64QAM | 0.99 |
Transmission block determining unit 4 can be big or small according to the transmission block that formula TBS=CR* (modmode+1) * Bits*RU acquisition reports.The value of RU can be from down control channel in the formula, and for example the control information of the HS-SCCH of TD-SCDMA carrying obtains.Bits can calculate from the control information that down control channel obtains.
In an other embodiment, the device that obtains the channel quality indication can also comprise verification unit and Block Error Rate statistic unit.Described verification unit is suitable for transmission block is carried out verification, produces and preserve check results.The Block Error Rate statistic unit is suitable for based on described check results, the Block Error Rate in the timing statistics window.Describedly transmission block is carried out verification can be cyclic redundancy check (CRC), it is 0 o'clock that described verification unit is carried out the cyclic redundancy check (CRC) result to transmission block, produces the correct check results of transmission block; It is 1 o'clock that transmission block is carried out the cyclic redundancy check (CRC) result, produces the check results of transmission block mistake.
The application's technical scheme goes for TD-SCDMA or WCDMA system.Difference is:
The Traffic Channel of TD-SCDMA is HS-DSCH, and down control channel is HS-SCCH, and ascending control channel is HS-SICH.
The Traffic Channel of WCDMA is HS-DSCH, and down control channel is HS-SCCH, and ascending control channel is HS-DPCCH.
Use two or more time windows that CQI is adjusted step-length and retrain, can obtain meticulousr faster adjustment, thereby so that the CQI that obtains is more accurate in time window.
The present invention also provides a kind of portable terminal, comprises the above-mentioned device that obtains the channel quality indication.
The present invention also provides a kind of communication system, comprises above-mentioned portable terminal.
As shown in Figure 3, the present invention also provides a kind of method of obtaining the channel quality indication, and described channel quality indication comprises the transmission block size that reports and the modulation system that reports, described comprising:
Step S1 obtains the Block Error Rate at least one time window, and described time window is the front scheduled time of transmission block that begins to receive down channel;
Step S2 satisfies when pre-conditioned the code check CR that reports based on current code check CR ' acquisition at least at the check results of the transmission block that receives and the Block Error Rate in the described time window;
Step S3 obtains the modulation system that reports based on the described code check that reports;
Step S4 obtains the transmission block size TBS that reports based on Resource Unit RU, the described code check that reports and the modulation system that reports.
Described down channel comprises HS-DSCH.
Described current code check or described Resource Unit obtain from the control information that down control channel carries.
The described modulation system that obtains to report based on the described code check that reports comprises: obtain the described modulation system that reports by inquiry code check and modulation system corresponding relation.
Described CR=TBS/RU/ ((modmode+1)/Bits), wherein, modmode=0 when the described modulation system that reports is QPSK, modmode=1 when the described modulation system that reports is 16QAM, modmode=2 when the described modulation system that reports is 64QAM, Bits are the bit number of a Resource Unit.
When obtaining the Block Error Rate of a time window, the code check CR that obtains to report has following several situation:
Describedly pre-conditionedly be: the Block Error Rate in the correct and described time window of described transmission block verification is greater than first threshold; The * BLER*a1 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a1 ∈ [0,1].
Describedly pre-conditionedly be: the Block Error Rate in the correct and described time window of described transmission block verification is less than or equal to first threshold; The * a2 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, a2 ∈ [0,1].
Describedly pre-conditionedly be: the Block Error Rate in described transmission block check errors and the described time window is greater than first threshold; Described CR=CR '-nCR* (1-BLER) * a3, wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a3 ∈ [0,1].
Describedly pre-conditionedly be: the Block Error Rate in described transmission block check errors and the described time window is less than or equal to first threshold; Described CR=CR '-nCR* (1-BLER) * a4, wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a4 ∈ [0,1].
Described first threshold ∈ [0,1].
When obtaining the Block Error Rate of two time windows, the code check CR that obtains to report has following several situation:
Described time window comprises very first time window and the second time window, and described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in correct, the described very first time window of described transmission block verification greater than the Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; The * BLERshort*b1 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b1 ∈ [0,1].
Described time window comprises very first time window and the second time window, and described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate that the Block Error Rate in correct, the described very first time window of described transmission block verification is less than or equal in Second Threshold and the second time window is less than or equal to the 3rd threshold value; The * b2 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, b2 ∈ [0,1].
Described time window comprises very first time window and the second time window, and described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in described transmission block check errors, the described very first time window greater than the Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; Described CR=CR '-nCR* (1-BLERshort) * b3, wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b3 ∈ [0,1].
Described time window comprises very first time window and the second time window, and described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate that the Block Error Rate in described transmission block check errors, the described very first time window is less than or equal in Second Threshold and the second time window is less than or equal to the 3rd threshold value; Described CR=CR '-nCR* (1-BLERshort) * b4, wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b4 ∈ [0,1].
Described time window comprises very first time window and the second time window, and described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in correct, the described very first time window of described transmission block verification is less than or equal to the 3rd threshold value greater than the Block Error Rate in Second Threshold and the second time window, or the Block Error Rate in the described very first time window is less than or equal to Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; The * BLERshort*b5 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b5 ∈ [0,1].
Described time window comprises very first time window and the second time window, and described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in described transmission block check errors, the described very first time window is less than or equal to the 3rd threshold value greater than the Block Error Rate in Second Threshold and the second time window, or the Block Error Rate in the described very first time window is less than or equal to Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; Described CR=CR '-nCR*b6, wherein, nCR is the code check fiducial value, b6 ∈ [0,1].
Described Second Threshold is ∈ [0,1], and described the 3rd threshold value is ∈ [0,1]
Described very first time window is 80ms, and described the second time window is 160ms.
Described nCR is normalized to the code check of 16QAM modulation system.
Described nCR=TBS '/RU/176, wherein, the transmission block size of described TBS ' for receiving, the described transmission block size that receives and described Resource Unit obtain from the control information of down control channel carrying.
Although the present invention discloses as above with preferred embodiment, the present invention is defined in this.Any those skilled in the art without departing from the spirit and scope of the present invention, all can make various changes or modifications, so protection scope of the present invention should be with claim institute limited range.
Claims (42)
1. one kind is obtained the device that channel quality is indicated, and described channel quality indication comprises the transmission block size that reports and the modulation system that reports, and it is characterized in that, comprising:
The Block Error Rate determining unit is suitable for obtaining the Block Error Rate at least one time window, and described time window is the front scheduled time of transmission block that begins to receive down channel;
The code check determining unit is suitable for satisfying when pre-conditioned the code check CR that reports based on current code check CR ' acquisition at least at the check results of the transmission block that receives and the Block Error Rate in the described time window;
The modulation system determining unit is suitable for the modulation system that reports based on the described code check acquisition that reports;
The transmission block determining unit is suitable for obtaining the transmission block size TBS that reports based on Resource Unit RU, the described code check that reports and the modulation system that reports.
2. the device that obtains the channel quality indication as claimed in claim 1 is characterized in that, described down channel comprises HS-DSCH.
3. the device that obtains the channel quality indication as claimed in claim 1 is characterized in that, described current code check or described Resource Unit obtain from the control information that down control channel carries.
4. the device that obtains the channel quality indication as claimed in claim 1 is characterized in that, described modulation system determining unit is suitable for obtaining the described modulation system that reports by inquiry code check and modulation system corresponding relation.
5. the device that obtains channel quality indication as claimed in claim 1, it is characterized in that, described CR=TBS/RU/ ((modmode+1)/Bits), wherein, modmode=0 when the described modulation system that reports is QPSK, modmode=1 when the described modulation system that reports is 16QAM, modmode=2 when the described modulation system that reports is 64QAM, Bits are the bit number of a Resource Unit.
6. the device that obtains channel quality indication as claimed in claim 1 is characterized in that, describedly pre-conditionedly is: the Block Error Rate in the correct and described time window of described transmission block verification is greater than first threshold; The * BLER*a1 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a1 ∈ [0,1].
7. the device that obtains channel quality indication as claimed in claim 1 is characterized in that, describedly pre-conditionedly is: the Block Error Rate in the correct and described time window of described transmission block verification is less than or equal to first threshold; The * a2 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, a2 ∈ [0,1].
8. the device that obtains channel quality indication as claimed in claim 1 is characterized in that, describedly pre-conditionedly is: the Block Error Rate in described transmission block check errors and the described time window is greater than first threshold; Described CR=CR '-nCR* (1-BLER) * a3, wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a3 ∈ [0,1].
9. the device that obtains channel quality indication as claimed in claim 1 is characterized in that, describedly pre-conditionedly is: the Block Error Rate in described transmission block check errors and the described time window is less than or equal to first threshold; Described CR=CR '-nCR* (1-BLER) * a4, wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a4 ∈ [0,1].
10. such as each described device that obtains the channel quality indication of claim 6-9, it is characterized in that described first threshold ∈ [0,1].
11. the device that obtains the channel quality indication as claimed in claim 1 is characterized in that described time window comprises very first time window and the second time window, described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in correct, the described very first time window of described transmission block verification greater than the Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; The * BLERshort*b1 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b1 ∈ [0,1].
12. the device that obtains the channel quality indication as claimed in claim 1 is characterized in that described time window comprises very first time window and the second time window, described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate that the Block Error Rate in correct, the described very first time window of described transmission block verification is less than or equal in Second Threshold and the second time window is less than or equal to the 3rd threshold value; The * b2 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, b2 ∈ [0,1].
13. the device that obtains the channel quality indication as claimed in claim 1 is characterized in that described time window comprises very first time window and the second time window, described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in described transmission block check errors, the described very first time window greater than the Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; Described CR=CR '-nCR* (1-BLERshort) * b3, wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b3 ∈ [0,1].
14. the device that obtains the channel quality indication as claimed in claim 1 is characterized in that described time window comprises very first time window and the second time window, described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate that the Block Error Rate in described transmission block check errors, the described very first time window is less than or equal in Second Threshold and the second time window is less than or equal to the 3rd threshold value; Described CR=CR '-nCR* (1-BLERshort) * b4, wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b4 ∈ [0,1].
15. the device that obtains the channel quality indication as claimed in claim 1 is characterized in that described time window comprises very first time window and the second time window, described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in correct, the described very first time window of described transmission block verification is less than or equal to the 3rd threshold value greater than the Block Error Rate in Second Threshold and the second time window, or the Block Error Rate in the described very first time window is less than or equal to Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; The * BLERshort*b5 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b5 ∈ [0,1].
16. the device that obtains the channel quality indication as claimed in claim 1 is characterized in that described time window comprises very first time window and the second time window, described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in described transmission block check errors, the described very first time window is less than or equal to the 3rd threshold value greater than the Block Error Rate in Second Threshold and the second time window, or the Block Error Rate in the described very first time window is less than or equal to Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; Described CR=CR '-nCR*b6, wherein, nCR is the code check fiducial value, b6 ∈ [0,1].
17. such as the described device that obtains the channel quality indication of the arbitrary claim of claim 11-16, it is characterized in that described Second Threshold ∈ [0,1], described the 3rd threshold value ∈ [0,1].
18. such as the described device that obtains the channel quality indication of the arbitrary claim of claim 11-16, it is characterized in that, described very first time window is 80ms, described the second time window is 160ms.
19. such as the described device that obtains the channel quality indication of the arbitrary claim of claim 6-9,11-16, it is characterized in that, described nCR is normalized to the code check of 16QAM modulation system.
20. the device that obtains the channel quality indication as claimed in claim 19, it is characterized in that, described nCR=TBS '/RU/176, wherein, the transmission block size of described TBS ' for receiving, the described transmission block size that receives and described Resource Unit obtain from the control information of down control channel carrying.
21. a portable terminal is characterized in that, comprises the described device that obtains the channel quality indication of the arbitrary claim of claim 1-20.
22. a communication system is characterized in that, comprises the described portable terminal of claim 21.
23. a method of obtaining the channel quality indication, described channel quality indication comprises the transmission block size that reports and the modulation system that reports, and it is characterized in that, comprising:
Obtain the Block Error Rate at least one time window, described time window is the front scheduled time of transmission block that begins to receive down channel;
Satisfy when pre-conditioned the code check CR that reports based on current code check CR ' acquisition at least at the check results of the transmission block that receives and the Block Error Rate in the described time window;
Obtain the modulation system that reports based on the described code check that reports;
Obtain the transmission block size TBS that reports based on Resource Unit RU, the described code check that reports and the modulation system that reports.
24. the method for obtaining the channel quality indication as claimed in claim 23 is characterized in that described down channel comprises HS-DSCH.
25. the method for obtaining the channel quality indication as claimed in claim 23 is characterized in that, described current code check or described Resource Unit obtain from the control information that down control channel carries.
26. the method for obtaining the channel quality indication as claimed in claim 23 is characterized in that, the described modulation system that obtains to report based on the described code check that reports comprises: obtain the described modulation system that reports by inquiry code check and modulation system corresponding relation.
27. the method for obtaining the channel quality indication as claimed in claim 23, it is characterized in that, described CR=TBS/RU/ ((modmode+1)/Bits), wherein, modmode=0 when the described modulation system that reports is QPSK, modmode=1 when the described modulation system that reports is 16QAM, modmode=2 when the described modulation system that reports is 64QAM, Bits are the bit number of a Resource Unit.
28. the method for obtaining channel quality indication as claimed in claim 23 is characterized in that, describedly pre-conditionedly is: the Block Error Rate in the correct and described time window of described transmission block verification is greater than first threshold; The * BLER*a1 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a1 ∈ [0,1].
29. the method for obtaining channel quality indication as claimed in claim 23 is characterized in that, describedly pre-conditionedly is: the Block Error Rate in the correct and described time window of described transmission block verification is less than or equal to first threshold; The * a2 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, a2 ∈ [0,1].
30. the method for obtaining channel quality indication as claimed in claim 23 is characterized in that, describedly pre-conditionedly is: the Block Error Rate in described transmission block check errors and the described time window is greater than first threshold; Described CR=CR '-nCR* (1-BLER) * a3, wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a3 ∈ [0,1].
31. the method for obtaining channel quality indication as claimed in claim 23 is characterized in that, describedly pre-conditionedly is: the Block Error Rate in described transmission block check errors and the described time window is less than or equal to first threshold; Described CR=CR '-nCR* (1-BLER) * a4, wherein, nCR is the code check fiducial value, BLER is the Block Error Rate in the described time window, a4 ∈ [0,1].
32. such as each described method of obtaining the channel quality indication of claim 28-31, it is characterized in that described first threshold ∈ [0,1].
33. the method for obtaining the channel quality indication as claimed in claim 23 is characterized in that described time window comprises very first time window and the second time window, described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in correct, the described very first time window of described transmission block verification greater than the Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; The * BLERshort*b1 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b1 ∈ [0,1].
34. the method for obtaining the channel quality indication as claimed in claim 23 is characterized in that described time window comprises very first time window and the second time window, described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate that the Block Error Rate in correct, the described very first time window of described transmission block verification is less than or equal in Second Threshold and the second time window is less than or equal to the 3rd threshold value; The * b2 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, b2 ∈ [0,1].
35. the method for obtaining the channel quality indication as claimed in claim 23 is characterized in that described time window comprises very first time window and the second time window, described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in described transmission block check errors, the described very first time window greater than the Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; Described CR=CR '-nCR* (1-BLERshort) * b3, wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b3 ∈ [0,1].
36. the method for obtaining the channel quality indication as claimed in claim 23 is characterized in that described time window comprises very first time window and the second time window, described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate that the Block Error Rate in described transmission block check errors, the described very first time window is less than or equal in Second Threshold and the second time window is less than or equal to the 3rd threshold value; Described CR=CR '-nCR* (1-BLERshort) * b4, wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b4 ∈ [0,1].
37. the method for obtaining the channel quality indication as claimed in claim 23 is characterized in that described time window comprises very first time window and the second time window, described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in correct, the described very first time window of described transmission block verification is less than or equal to the 3rd threshold value greater than the Block Error Rate in Second Threshold and the second time window, or the Block Error Rate in the described very first time window is less than or equal to Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; The * BLERshort*b5 of described CR=CR '+(1-nCR), wherein, nCR is the code check fiducial value, BLERshort is the Block Error Rate in the described very first time window, b5 ∈ [0,1].
38. the method for obtaining the channel quality indication as claimed in claim 23 is characterized in that described time window comprises very first time window and the second time window, described very first time window is less than described the second time window; Describedly pre-conditionedly be: the Block Error Rate in described transmission block check errors, the described very first time window is less than or equal to the 3rd threshold value greater than the Block Error Rate in Second Threshold and the second time window, or the Block Error Rate in the described very first time window is less than or equal to Block Error Rate in Second Threshold and the second time window greater than the 3rd threshold value; Described CR=CR '-nCR*b6, wherein, nCR is the code check fiducial value, b6 ∈ [0,1].
39. such as the described method of obtaining the channel quality indication of the arbitrary claim of claim 33-38, it is characterized in that described Second Threshold ∈ [0,1], described the 3rd threshold value ∈ [0,1].
40. such as the described method of obtaining the channel quality indication of the arbitrary claim of claim 33-38, it is characterized in that, described very first time window is 80ms, described the second time window is 160ms.
41. such as the described method of obtaining the channel quality indication of the arbitrary claim of claim 28-31,33-38, it is characterized in that, described nCR is normalized to the code check of 16QAM modulation system.
42. the method for obtaining the channel quality indication as claimed in claim 41, it is characterized in that, described nCR=TBS '/RU/176, wherein, the transmission block size of described TBS ' for receiving, the described transmission block size that receives and described Resource Unit obtain from the control information of down control channel carrying.
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