CN101296461B - Physical resource block descending channel quality reporting method, updating method and device thereof - Google Patents
Physical resource block descending channel quality reporting method, updating method and device thereof Download PDFInfo
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Abstract
The invention discloses a reporting method for the downlink signal channel quality of a physical resource block, which comprises the following steps: the No. n bit of the quality measured value of each signal channel to be reported this time and a reporting strategy to be adopted this time are confirmed by a user terminal and quality reporting information of the downlink signal channel of the physical resource block is generated according to the confirmed No. n bit and the reporting strategy; the reporting information is sent to a network side; an No. n bit label is carried in the reporting information for indicating that the value reported this time is related to the No. n bit of the quality measured value of each signal channel; a reporting strategy label is also carried in the reporting information for indicating the reporting strategy adopted in the report; a bitmap is also carried in the reporting information for indicating updating operation contained in the reporting strategy executed by the network side against the reporting quality value of last time of each signal channel stored. The method of the invention can realize the report of the quality of all downlink signal channels of PRB with relatively small reporting information and is able to follow up the changes of the quality of the signal channels, thereby promoting the performance of the network side for dispatching the PRB.
Description
Technical field
The present invention relates to wireless communication field; Relate in particular to 3GPP Long Term Evolution (Long Term Evolution; LTE) Physical Resource Block (Physical Resource Block, PRB) a kind of report method, update method and relevant user terminals and the network side entity of down channel quality in the system.
Background technology
In 3GPP LTE system, system resource is the Physical Resource Block (PRB) that is made up of running time-frequency resource.(User Equipment UE) measures the channel quality of different PRB to user terminal, reports evolution base station (E-NodeB), gives UE by E-NodeB according to data dispatching as a result or resource that UE reports.
When confirming to report mode, the factor of two mutual contradictions is arranged:
1,,, will cause system because the excessive and feasible effective efficiency of transmission of signaling consumption reduces if the message that reports is excessive because the UE that LTE need support is many, and the message size that reports influences the expense of system signaling;
If 2 UE are because reporting message is too small; And can not report rational channel quality timely, and will cause E-Node can not reasonably adjust the result of scheduling according to the content that UE reports, cause the service quality of UE to descend; The throughput of system descends, and possibly cause that packet loss rises.Therefore, how to report the channel quality of PRB directly to influence the throughput of system and the service quality that E-NodeB gives UE.
A kind of PRB descending channel quality reporting method of the prior art is:
Utilize modulation coding mode (the Modulation and CodingScheme of bitmap (BITMAP) and nybble; MCS) describe position (MCS refers to the modulating-coding exponent number that modulation coding mode is corresponding) and carry out the PRB descending channel quality reporting; Only report the MCS of PRB to describe a corresponding PRB of represented value " M " greater than MCS; If that is: the MCS of certain PRB is greater than value " M ", then corresponding with this PRB BITMAP position equals " 1 ", otherwise equals " 0 ".This mode that reports; Although the message that reports is less; But can only report limited several PRB, like this, E-NodeB can only know that the channel quality that the BITMAP position equals the corresponding PRB of " 1 " can support given MCS; For other PRB, E-NodeB only knows that also they can not support given MCS.So this following shortcoming of existence that reports scheme:
1, because E-NodeB can only equal the Data-carrying of UE on the corresponding PRB of " 1 " in the BITMAP position that UE reports, under multi-user's situation, this mode that reports has bigger limitation to scheduling.
When 2, using the MCS of high value, can only report the down channel quality of more a spot of PRB; On the contrary, in order to report the down channel quality of many PRB simultaneously, can only use MCS than low value; And the height of MCS will influence the throughput of system.
3, this information that reports mode to report before can not using of the prior art, even the channel quality of PRB does not change, this mode that reports can not reach gradually the purpose that the channel quality with all PRB reports fully through repeatedly reporting.
Summary of the invention
The embodiment of the invention provides a kind of Physical Resource Block (PRB) descending channel quality reporting method, realizes using smaller reporting message to report the down channel quality of all PRB.
A kind of physical resource block descending channel quality reporting method comprises:
User terminal is confirmed the n bit and this reporting policy of each channel quality measurements that this reports;
According to the said n bit of confirming and this reporting policy, generate physical resource block descending channel quality reporting message;
Send said reporting message to network side;
Carry n bit sign in the said reporting message, be used to indicate this value of reporting relevant with the n bit of each channel quality measurements;
Also carry the reporting policy sign in the said reporting message, be used to indicate this to report the reporting policy that is adopted;
Also carry bitmap in the said reporting message, be used to indicate network side that value of reporting last time of each channel quality of storage is carried out the renewal operation that said reporting policy comprised.
A kind of Physical Resource Block down channel quality update method comprises:
Network side entity receives the physical resource block descending channel quality reporting message that user terminal sends; Parse the bit sign, reporting policy sign and the bitmap that carry in the said reporting message, said bitmap is used to indicate network side according to this reporting policy value of reporting last time of corresponding N channel quality of storage to be carried out the renewal operation;
Network side entity is carried out the renewal operation that said reporting policy comprised according to said bitmap to value of reporting last time of each channel quality of storage.
A kind of user terminal comprises: measurement module, reporting information determination module and reporting message sending module, wherein; Said measurement module; Be used to measure the down channel quality of each Physical Resource Block, and the measured value that obtains is represented with a plurality of bits, send to said reporting information determination module;
Said reporting information determination module; Be used to determine the n bit of this each channel quality measurements that reports network side and the reporting policy of this employing; Generate physical resource block descending channel quality reporting message, send to said reporting message sending module;
Said reporting message sending module is used for sending physical resource block descending channel quality reporting message to network side; Carry n bit sign in the said reporting message, it is relevant with the n bit of each channel quality measurements to be used to indicate this to report; Also carry the reporting policy sign, be used to indicate this to report the reporting policy of employing; Also carry bitmap, be used to indicate network side value of reporting last time of each channel quality of storage to be carried out and upgrade operation according to this reporting policy.
A kind of network side entity; Comprise: reporting message receives parsing module and channel quality update module; Wherein, Said reporting message receives parsing module, is used to receive the physical resource block descending channel quality reporting message that user terminal sends, and parses bit sign, bitmap and the reporting policy sign of carrying in the said reporting message; And analysis result sent to said channel quality update module;
Said channel quality update module is used for according to this reporting policy value of reporting last time of each channel quality of storage being carried out the renewal operation according to said analysis result.
According to the embodiment of the invention, user terminal is represented this down channel quality measured value of measuring the PRB that obtains with a plurality of bits; After determining the reporting policy of corresponding bit position and this employing of this each channel quality measurements that reports, send PRB descending channel quality reporting message to network side; In reporting message, carry n bit sign, be used to indicate this value of reporting relevant with the n bit of each channel quality measurements; Also carry the reporting policy sign, be used to indicate this to report the reporting policy that is adopted; Also carry bitmap, be used to indicate network side that value of reporting last time of each channel quality of storage is carried out the renewal operation that said reporting policy comprised; Like this; The network entity (user terminal being carried out the network side entity of resource management like base station or other) that receives reporting message just can be according to the bit sign of carrying in the reporting message, bitmap and reporting policy sign, and value of reporting last time of the down channel quality data of each corresponding PRB that this locality is stored is upgraded.Bit identifies and the reporting policy sign only needs a spot of bit number owing to carry in the reporting message, makes reporting message less; In addition, in each reporting message, carry bitmap, the channel quality measurements of each PRB is carried out the renewal operation that reporting policy comprised, be implemented in the down channel quality that reports all PRB in the less reporting message in order to the indication network side.The embodiment of the invention just can reach the purpose that the channel quality with all PRB reports fully through the control reporting policy through limited reporting message several times.
Description of drawings
Fig. 1 is an embodiment of the invention PRB descending channel quality reporting method flow chart;
When Fig. 2 adopts the down channel quality of bitmap reporting PRB for the embodiment of the invention, bit sign and concern sketch map with the corresponding bit position of each PRB channel quality measurements;
Fig. 3 carries bit sign and reporting policy sign for the embodiment of the invention through bit indicating bit in the reporting message and control bit, realizes that each PRB channel quality reports and one of the sketch map that upgrades;
Fig. 4 carries bit sign and reporting policy sign for the embodiment of the invention through bit indicating bit in the reporting message and control bit, realize that each PRB channel quality reports and the sketch map that upgrades two;
The user terminal structural representation that Fig. 5 provides for the embodiment of the invention;
The architecture of base station sketch map that Fig. 6 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of PRB descending channel quality reporting method; Reporting the PRB down channel quality with user terminal to the network side base station is that example is (in the reality; The PRB down channel quality can also report other functional entity of network side), its idiographic flow is as shown in Figure 1, comprising:
Step S11, user terminal are represented this down channel quality measured value of measuring each PRB that obtains with a plurality of bits;
Step S12, user terminal are determined the corresponding bit position of this each channel quality measurements that reports and the reporting policy of this employing;
The n bit and the reporting policy of each channel quality measurements that step S13, basis are determined generate PRB descending channel quality reporting message; In reporting message, carry n bit sign, be used to indicate this value of reporting relevant with the n bit of each channel quality measurements; Also carry the reporting policy sign, be used to indicate this to report the reporting policy that is adopted; Also carry bitmap, be used to indicate network side that value of reporting last time of each channel quality of storage is carried out the renewal operation that said reporting policy comprised;
Step S14, user terminal send PRB descending channel quality reporting message to the base station;
Step S15, base station resolves go out bit sign, bitmap and the reporting policy sign of carrying in the reporting message;
The descending channel quality reporting value of corresponding PRB is determined according to this reporting policy, bitmap and n bit sign in step S16, base station;
The down channel quality data of the corresponding PRB of local storage are upgraded in step S17, base station with the said value of reporting.
With specific embodiment above-mentioned PRB descending channel quality reporting method is described in detail below.
Reporting message structure in the embodiment of the invention comprises:
1., bit indicating bit: be used to carry the bit sign, indicate the corresponding bit position of this each channel quality measurements that reports; The amount of bits that the bit indicating bit takies in reporting message is by the bit number decision of the down channel quality measured value of Physical Resource Block; Suppose that channel quality measurements representes with 4bit, this bit indicating bit take 2 bit positions can indicate in the channel quality measurements 4 bit one of them; That is:
When the bit that carries in the bit indicating bit was designated " 00 ", being used for indicating the bitmap (BITMAP) that carries in the current reporting message was that (Least SignificantBit LSB) is correlated with for the 1st of beginning from least significant bit with each channel quality measurements;
When the bit that carries in the bit indicating bit was designated " 01 ", being used for indicating the bitmap that carries in the current reporting message was that the 2nd of beginning from least significant bit with each channel quality measurements is relevant;
When the bit that carries in the bit indicating bit was designated " 10 ", being used for indicating the bitmap that carries in the current reporting message was that the 3rd of beginning from least significant bit with each channel quality measurements is relevant;
When the bit that carries in the bit indicating bit was designated " 11 ", being used for indicating the bitmap that carries in the current reporting message was that the 4th of beginning from least significant bit with each channel quality measurements is relevant;
2., control bit: be used for indicating user terminal this report the reporting policy that is adopted; The amount of bits that control bit takies in reporting message is by the reporting policy number decision of user terminal and base station agreement; If only arrange two kinds of reporting policies, then control bit take 1 bit position can indicate two kinds of reporting policies one of them; If the agreement reporting policy have four kinds, then control bit need take 2 bit positions just can indicate four kinds of reporting policies one of them.
3., bitmap (BITMAP): BITMAP is the vector of a N bit position, corresponding to N the PRB that UE measures, the measured value of channel quality that the i position among the BITMAP and this UE measure i PRB is relevant; That is:
When the bit indicating bit indicate the bitmap that carries in the current reporting message be with each channel quality measurements from n position that least significant bit begins (for example: when channel quality measurements adopts 4 bit; When n=1,2,3 or 4) being correlated with, the i position among the BITMAP is used to indicate network side that value of reporting last time of the i channel quality of storage is carried out the renewal operation that this reporting policy comprised; Especially,, just can in BITMAP, comprise " 0 " or " 1 ", carry out first kind that this reporting policy comprised in order to the indication network side respectively and upgrade operation or second kind of renewal operation if each reporting policy only comprises two kinds of different renewal operations.For example: i bit among the BITMAP is " 0 ", and first kind of operation of this reporting policy carried out in expression request network side base station to value of reporting last time of i channel quality; J bit among the BITMAP is " 1 ", and second kind of operation of this reporting policy carried out in expression request network side base station to value of reporting last time of j channel quality.
In the reality, be not limited to and adopt binary " 0 " or " 1 " to indicate reporting policy to comprise the renewal operation; When the renewal that reporting policy comprised is operated above 2 kinds, can also carry with other identifier of network side agreement by BITMAP and indicate corresponding renewal operation.
Referring to Fig. 2; (MCS is the modulating-coding exponent number to report the MCS of each PRB with UE to the base station; Relevant with the measured value of the channel quality of PRB) be example; Suppose that UE can represent with 4 bit the MCS of each PRB, be quantized into one 0～15 number, 2 bit indicating bits just can be represented any of MCS.Express when the bit indicating bit points to the 3rd of MCS the 3rd of MCS value of reporting of each PRB (N PRB altogether) being begun to calculate from least significant bit (LSB) corresponding to UE of each among the BITMAP among Fig. 2.
The concrete reporting policy of the reporting policy sign representative of making an appointment different between user terminal and the base station; Suppose the four kinds of reporting policies of having made an appointment between user terminal and the base station; Its corresponding reporting policy sign and concrete reporting policy be (be merely for example at this, concrete reporting policy can be varied) as follows:
1), carry reporting policy sign " 00 " in the control bit, when this value of reporting was relevant with the n bit, specifically reporting policy was:
Select the bit corresponding PRB of BITMAP intermediate value for " 1 "; The n bit of the PRB corresponding channel quality data of selecting (being last time value of reporting of the corresponding PRB of base station stored) is set to " 1 ", the channel quality data after upgrading as corresponding PRB;
Select the bit corresponding PRB of BITMAP intermediate value for " 0 ", the n bit of the PRB corresponding channel quality data of selecting (being the value of reporting last time) is set to " 0 ", the channel quality data after upgrading as corresponding PRB.
2), carry reporting policy sign " 01 " in the control bit, when this value of reporting was relevant with the n bit, specifically reporting policy was:
Select the bit corresponding PRB of BITMAP intermediate value, add on the n bit with the PRB corresponding channel quality data of selecting (being the value of reporting last time) " 1 ", the channel quality data after upgrading as corresponding PRB for " 1 ";
Select the bit corresponding PRB of BITMAP intermediate value, subtract on the n bit with the PRB corresponding channel quality data of selecting (being the value of reporting last time) " 1 ", the channel quality data after upgrading as corresponding PRB for " 0 ".
3), carry reporting policy sign " 10 " in the control bit, when this value of reporting was relevant with the n bit, specifically reporting policy was:
Select the bit corresponding PRB of BITMAP intermediate value for " 1 "; The n bit of the PRB corresponding channel quality data of selecting (being the value of reporting last time) is established set; Channel quality data after then the n bit being upgraded is depreciation 1 again, the channel quality data after upgrading as corresponding PRB;
Select the bit corresponding PRB of BITMAP intermediate value for " 0 ", (n+1) bit of the PRB corresponding channel quality data of selecting (being the value of reporting last time) is set to " 0 ", the channel quality data after upgrading as corresponding PRB.
4), carry reporting policy sign " 11 " in the control bit, when this value of reporting was relevant with the n bit, specifically reporting policy was:
Select the BITMAP intermediate value and be the corresponding PRB of bit of " 1 ", each low bits of ratio n of the PRB corresponding channel quality data of selecting (being the value of reporting last time) all is set to " 0 ", as the channel quality data after the corresponding PRB renewal;
Select the bit corresponding PRB of BITMAP intermediate value, subtract on (n+1) bit with the PRB corresponding channel quality data of selecting (being the value of reporting last time) " 1 ", the channel quality data after upgrading as corresponding PRB for " 0 ".
The four kinds of preferable reporting policies of more than having given an example can also adopt other reporting policy in the reality, for example:
For example:, upgrade the n bit of corresponding PRB down channel quality data according to the n bit sign of carrying in the reporting message; And be " 0 " with the bit position lower than n, the bit higher than n do not upgrade.That is: E-NodeB begins the MCS of these all PRB of UE of this locality storage all to be changed to " 0 " to (n-1) position from least significant bit, and then according to the BITMAP that carries in this reporting message, the MCS that corresponding PRB is set is from n position that least significant bit begins to calculate.As shown in Figure 3, the bit indicating bit is " 10 ", i.e. n=3; E-NodeB empties low 2 (being changed to " 0 ") of the MCS of these all PRB of UE; The 3rd of MCS of corresponding PRB is set according to BITMAP then, and all the other positions (the 4th) do not change, and represent that with " X " this bit numerical value is constant among Fig. 3.
Again for example: according to the n bit sign of carrying in the reporting message; Select the bit corresponding PRB of BITMAP intermediate value for " 1 "; With the n bit position of the PRB that selects is " 1 ", and the bit lower than n all is changed to " 0 ", and the bit higher than n do not upgrade; For the BITMAP intermediate value for the bit of " 0 " the down channel quality data of corresponding PRB do not upgrade.That is: E-NodeB begins the MCS of all BITMAP intermediate values for the pairing PRB of bit of " 1 " all to be changed to " 0 " to (n-1) position from least significant bit, and the BITMAP intermediate value is set is " 1 " for the MCS of the pairing PRB of bit of " 1 " from n the bit position that least significant bit begins to calculate.As shown in Figure 4; E-NodeB all is changed to " 0 " with all BITMAP intermediate values for low 2 of the MCS of the pairing PRB of bit of " 1 "; And the 3rd the bit position of MCS that corresponding PRB is set be for " 1 ", and all the other do not change, and represent that with " X " this bit numerical value is constant among Fig. 4.
Can also control bit only take 1 bit and carry following two kinds of reporting policies, for example:
The reporting policy that control bit carries is designated the MCS (each bit position that is about to the MCS of all PRB is " 0 ") that " 0 ": E-NodeB empties these all PRB of UE of local storage earlier; Then according to the n bit that carries in reporting message sign and BITMAP, the MCS that corresponding PRB is set is from n position that least significant bit begins to calculate;
The reporting policy that control bit carries is designated " 1 ": E-NodeB to begin the MCS of this all PRB of UE all to be changed to " 0 " to (n-1) position from least significant bit; Then according to the n bit that carries in reporting message sign and BITMAP, the MCS that corresponding PRB is set is from n position that least significant bit begins to calculate.
More than concrete reporting policy is described; In practical application; User terminal need be according to the channel quality measurements of measuring each PRB that obtains; Determine the n bit of this each channel quality measurements that reports and the reporting policy of this employing, a kind of preferable definite method is:
User terminal measurement also obtains the down channel quality measured value of each Physical Resource Block;
Select each bit in each channel quality measurements respectively, determine the correspondence value of reporting that adopts each reporting policy;
Calculate the difference value between the vectorial B of vectorial A that said measured value constitutes and the said value of reporting formation;
The n bit and the corresponding reporting policy of correspondence under the selection differences value minimum are as the n bit of this each channel quality measurements that reports and the reporting policy of this employing.
For example: (following method is merely for example, can also adopt other definite method in the reality):
When calculating corresponding a kind of reporting policy of each bit respectively, the difference of its measured value and the value of reporting is to said difference summation; With with value as the difference value of said vectorial A and said vectorial B.Promptly select and be worth the corresponding bit position and the corresponding reporting policy of minimum, as the corresponding bit position of this each channel quality measurements that reports and the reporting policy of this employing.
Still adopt 4 bit with channel quality measurements below, having four kinds of different reporting policies is example, to how to confirm this corresponding bit position that reports and how to select reporting policy to specify:
1), supposes that UE need report the down channel quality of 12 PRB altogether; Suppose to report earlier the highest order (4bit position) of the down channel quality measured value of these 12 PRB; Select above-mentioned first kind of reporting policy, calculate each PRB corresponding channel quality value of reporting, calculate the measured value of each PRB and the difference of this value of reporting that calculates again respectively; The add up difference of 12 PRB obtains first and value;
2), adopt identical method in the step 1), calculate when reporting the 4bit position to select above-mentioned second kind of reporting policy second and the value that obtain;
3), adopt identical method in the step 1), calculate when reporting the 4bit position to select above-mentioned the third reporting policy the 3rd and the value that obtain;
4), adopt identical method in the step 1), calculate when reporting the 4bit position to select above-mentioned the 4th kind of reporting policy the 4th and the value that obtain;
5), adopt identical method in the step 1), calculate when reporting the 3bit position to select above-mentioned first kind of reporting policy the 5th and the value that obtain;
6), adopt identical method in the step 1), calculate when reporting the 3bit position to select above-mentioned second kind of reporting policy the 6th and the value that obtain;
7) adopt identical method in the step 1), calculate when reporting the 3bit position to select above-mentioned the third reporting policy the 7th and the value that obtain;
8) adopt identical method in the step 1), calculate when reporting the 3bit position to select above-mentioned the 4th kind of reporting policy the 8th and the value that obtain;
9)-12): adopt above-mentioned same method, calculate when reporting the 2bit position to select above-mentioned the 4th kind of reporting policy, obtain respectively the the 9th, the tenth, the 11 and the 12 and value;
13)-16): adopt above-mentioned same method, calculate when reporting the 1bit position to select above-mentioned the 4th kind of reporting policy, obtain respectively the 13, the 14, the 15 and the 16 and value;
Can know the reporting policy of bit that reports of each and value correspondence and selection by foregoing description; Above-mentioned 16 with value in select a minimum and value; Should minimum and pairing bit of value and reporting policy; As the corresponding bit position that need report in this reporting message and the reporting policy of this employing, and report the BITMAP of the correspondence of selected n bit and reporting policy simultaneously.
Specify how to confirm the bit, reporting policy and the BITMPA that report with an instance below.
Suppose need report altogether the channel quality data of 2 PRB, and the channel quality indication that reports with 4 bit bit representations (Channel Quality Indicator, CQI).The CQI that last time reports is [2,3]=[0010,0011], and the CQI of the acquisition of this measurement is [4,5]=[0100,0101].Suppose to have following two kinds of reporting policy A and reporting policy B (the bit indicating bit that this reports is indicated the j position):
Strategy A): the i position is " 0 " among the BITMAP, and expression is to the low j position zero clearing of CQI of i PRB; The i position is " 1 " among the BITPMAP, and expression makes j position=1 of the CQI of i PRB;
Strategy B): the i position is " 0 " among the BITMAP, representes that the j position of the CQI of i PRB subtracts 1; The i position is " 1 " among the BIPMAP, representes that the j position of the CQI of i PRB adds 1.
Calculate each bit CQI value of reporting under each reporting policy respectively; And (suppose that the CQI that reports should be greater than the CQI that measures with the error of the CQI that measures; Under the situation of given reporting policy and bit indication; Channel quality value of reporting of an i PRB always minimum CQI of the corresponding measured value difference with it of basis decides among the BIPMAP " 0 " perhaps value of " 1 "), specifically calculate as shown in table 1 below:
Table 1
| Strategy | The BITMAP that reports | The CQI that reports | Error with the CQI that measures |
| On the 4th, adopt tactful A | [0，0] | [0，0] | 4-0+5-0＝9 |
| On the 4th, adopt tactful B | Infeasible (can not find a kind of 0 or 1 value, make that the CQI that reports is reasonable) perhaps less than the CQI that measures | n.a. | n.a. |
| On the 3rd, adopt tactful A | [0，0] | [0，0] | 4-0+5-0＝9 |
| On the 3rd, adopt tactful B | Infeasible (can not find a kind of 0 or 1 value, make that the CQI that reports is reasonable) perhaps less than the CQI that measures | n.a. | n.a. |
| On the 2nd, adopt tactful A | [1，1] | [2，3] | 4-2+5-3＝4 |
| On the 2nd, adopt tactful B | [1，1] | [4，5] | 4-4+5-5＝0 |
| On the 1st, adopt tactful A | [1，1] | [3，3] | 4-3+5-3＝3 |
| On the 1st, adopt tactful B | [1，1] | [3，4] | 4-3+5-4＝2 |
Therefore, according to above-mentioned table 1 result of calculation, this reports selects error minimum a kind of reporting policy, corresponding bit position and BITMAP for being chosen in the 2nd the upward tactful B of employing, and the BITMAP that its correspondence reports is [1,1].Be that the bit indicating bit that carries in this reporting message is the 2nd bit, reporting policy is " tactful B ", and the BITMAP that reports is [1,1].
According to the above embodiment of the present invention, reporting message length has (N+4) individual bit, and wherein N is the PRB quantity that reports; In all the other 4 bits, 2 bits are used to indicate this concrete bit that reports, and other 2 bits are used to carry the reporting policy sign, the concrete reporting policy that this newspaper of indicating user terminal adopts.Like this, reporting message length less (identical) with message-length of the prior art, but reported the down channel quality of whole PRB simultaneously, make the base station can dispatch all PRB.
Next in the foregoing description, can utilize the information that reported last time, appends to report.Can report UE to measure the higher bit position of the MCS (or CQI) of each PRB earlier, report the low bit of MCS (or CQI) then, help being reported to reporting of hachure from MCS (or CQI) broad-brush.When channel quality does not change; If MSC (or CQI) is represented by 4 bit; Report the MCS (or CQI) that just can report all PRB for 4 times at most, when channel changes, can utilize control bit to carry the variation that different reporting policy signs is followed the tracks of channel quality flexibly effectively.
Can know according to the reporting policy in the foregoing description; When carrying out PRB down channel quality Data Update; Taked will hang down earlier the mode of the whole resets of bit, the MCS that can not occur reporting is greater than the situation of actual measured value, prevented because of the MCS that reports greater than actual measured value; Cause the higher MCS of base station assigns to give UE, the problem that causes packet loss to rise.
In the above-mentioned reporting policy, the reporting message that control bit equals " 00 " can periodically send, to remedy because use wrong MCS during the distribution PRB resource that the E-NodeB acceptance error causes.When UE detects MCS that MCS that E-NoeB uses reports with it and is not inconsistent, also need send the reporting message that a control bit equals " 00 ", make the channel quality data of UE and E-NodeB both sides maintenance upgrade synchronously.
In the foregoing description, reporting the MCS of each PRB or CQI with UE to the base station is example, and UE can report other measurement parameter of the down channel quality that characterizes PRB to the base station in the reality.
According to the PRB descending channel quality reporting method that the above embodiment of the present invention provides, a kind of structure embodiment of user terminal 10 is as shown in Figure 5, comprising: measurement module 101, reporting information determination module 102 and reporting message sending module 103; Wherein:
Reporting information determination module 102 is determined the corresponding bit position of this each channel quality measurements that reports the base station and the reporting policy of this employing, generates physical resource block descending channel quality reporting message, sends to reporting message sending module 103;
Reporting message sending module 103 sends physical resource block descending channel quality reporting message to network side; Carry n bit sign in the said reporting message, it is relevant with the n bit of each channel quality measurements to be used to indicate this to report; Also carry the reporting policy sign, be used to indicate this to report the reporting policy of employing; Also carry bitmap, be used to indicate network side that value of reporting last time of each channel quality of storage is carried out first kind according to this reporting policy and upgrade operation or second kind of renewal operation.
Reporting information determination module 102 further comprises: sub module stored 1021, calculating sub module 1022 and decision-making submodule 1023; Wherein:
Sub module stored 1021, the down channel quality measured value of each Physical Resource Block that reception and storage measurement module 101 send;
Calculating sub module 1022, the difference of the value of reporting and measured value when calculate adopting each reporting policy, and result of calculation sent to the submodule 1023 of making a strategic decision;
Specifically computational methods for example: select each bit in each channel quality measurements, calculate the correspondence value of reporting that adopts each reporting policy; From sub module stored 1021, obtain the down channel quality measured value of each Physical Resource Block of storage, calculate the down channel quality measured value of each Physical Resource Block and the value of reporting that calculates between difference; And when adding up corresponding each reporting policy of each bit respectively, the said difference sum that calculates, and statistics sent to decision-making submodule 1023;
Decision-making submodule 1023, selection differences value be hour corresponding bit and reporting policy, reports corresponding bit position and the reporting policy of this employing of each channel quality measurements of base station as this; For example: select calculating sub module 1022 corresponding bit position and the corresponding reporting policy with value minimum that calculate, report corresponding bit position and the reporting policy of this employing of each channel quality measurements of base station as this.
A kind of concrete structure embodiment of network side entity 20 is as shown in Figure 6, comprising: reporting message receives parsing module 201 and channel quality update module 202;
Reporting message receives parsing module 201, receives the physical resource block descending channel quality reporting message that user terminal sends, and parses bit sign, BIPMAP and the reporting policy sign of carrying in the said reporting message; And analysis result sent to channel quality update module 202;
Channel quality update module 202; Report the concrete reporting policy of employing according to the n bit of this each channel quality measurements that reports that parses, BIPMAP and this, value of reporting last time of each channel quality of storage is carried out according to this reporting policy upgraded operation.
Also comprise:
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (17)
1. a physical resource block descending channel quality reporting method is characterized in that, comprising:
User terminal is confirmed the n bit and this reporting policy of each channel quality measurements that this reports;
According to the said n bit of confirming and this reporting policy, generate physical resource block descending channel quality reporting message;
Send said reporting message to network side;
Carry n bit sign in the said reporting message, be used to indicate this value of reporting relevant with the n bit of each channel quality measurements;
Also carry the reporting policy sign in the said reporting message, be used to indicate this to report the reporting policy that is adopted;
Also carry bitmap in the said reporting message, be used to indicate network side that value of reporting last time of each channel quality of storage is carried out the renewal operation that said reporting policy comprised.
2. the method for claim 1 is characterized in that, said bit is identified at the amount of bits that takies in the said reporting message, by the bit number decision of the down channel quality measured value of Physical Resource Block.
3. the method for claim 1 is characterized in that, said user terminal is determined the n bit of this each channel quality measurements that reports and the reporting policy of this employing, specifically comprises:
User terminal measurement also obtains the down channel quality measured value of each Physical Resource Block;
Select each bit in each channel quality measurements respectively, determine the correspondence value of reporting that adopts each reporting policy;
Adopt the situation of each reporting policy to each bit, the difference value when calculating this bit and adopting this reporting policy, said difference value be the vectorial A that constitutes of said measured value with the vectorial B of the said value of reporting formation between difference value;
The n bit and the corresponding reporting policy of correspondence under the selection differences value minimum are as the n bit of this each channel quality measurements that reports and the reporting policy of this employing.
4. method as claimed in claim 3 is characterized in that, the difference value when this bit of said calculating adopts this reporting policy specifically comprises:
To each PRB, calculate the measured value of this PRB and the difference of this PRB corresponding channel quality value of reporting, to all difference summations, the difference value when adopting this reporting policy with value as this bit with this.
5. the method for claim 1 is characterized in that, at least one bit in the said reporting message is used to carry the corresponding reporting policy sign of the reporting policy of this employing.
6. like the arbitrary described method of claim 1-5; It is characterized in that; The bitmap that carries in the said reporting message takies N bit, and the value of said bit is used to indicate network side according to this reporting policy value of reporting last time of the channel quality of storage to be carried out the renewal operation.
7. method as claimed in claim 6; It is characterized in that; The value of said each bit of bitmap is " 0 " or " 1 ", is used to indicate network side according to this reporting policy value of reporting last time of corresponding N channel quality of storage to be carried out first kind and upgrades operation or second kind of renewal operation.
8. method as claimed in claim 7 is characterized in that said user terminal sends said reporting message to the network side cycle.
9. a Physical Resource Block down channel quality update method is characterized in that, comprising:
Network side entity receives the physical resource block descending channel quality reporting message that user terminal sends; Parse the bit sign, reporting policy sign and the bitmap that carry in the said reporting message, said bitmap is used to indicate network side according to this reporting policy value of reporting last time of corresponding N channel quality of storage to be carried out the renewal operation;
Network side entity is carried out the renewal operation that said reporting policy comprised according to said bitmap to value of reporting last time of each channel quality of storage.
10. method as claimed in claim 9 is characterized in that, has carried in the reporting message after n bit sign identifies with first reporting policy when said network side entity parses, and the concrete grammar that upgrades the down channel quality data of each Physical Resource Block is:
Select the bit pairing Physical Resource Block of said bitmap intermediate value for " 1 ", the n bit of the channel quality data of the Physical Resource Block of selecting is set to " 1 ", the channel quality data after upgrading as corresponding Physical Resource Block;
Select the bit pairing Physical Resource Block of said bitmap intermediate value for " 0 ", the n bit of the channel quality data of the Physical Resource Block of selecting is set to " 0 ", the channel quality data after upgrading as corresponding Physical Resource Block.
11. method as claimed in claim 9 is characterized in that, after said base station resolves went out to have carried in the reporting message n bit sign and second reporting policy sign, the concrete grammar that upgrades the down channel quality data of each Physical Resource Block was:
Select said bitmap intermediate value to be the pairing Physical Resource Block of bit of " 1 ", add " 1 ", the channel quality data after upgrading as corresponding Physical Resource Block on the n bit with the channel quality data of the Physical Resource Block of selecting;
Select said bitmap intermediate value to be the pairing Physical Resource Block of bit of " 0 ", subtract " 1 ", the channel quality data after upgrading as corresponding Physical Resource Block on the n bit with the channel quality data of the Physical Resource Block of selecting.
12. method as claimed in claim 9 is characterized in that, after said base station resolves went out to have carried in the reporting message n bit sign and the 3rd reporting policy sign, the concrete grammar that upgrades the down channel quality data of each Physical Resource Block was:
Select the bit pairing Physical Resource Block of said bitmap intermediate value for " 1 "; The n bit of the channel quality data of the Physical Resource Block of selecting is established set; Channel quality data after then the n bit being upgraded is depreciation 1 again, the channel quality data after upgrading as corresponding Physical Resource Block;
Select the bit pairing Physical Resource Block of said bitmap intermediate value for " 0 ", (n+1) bit of the channel quality data of the Physical Resource Block of selecting is set to " 0 ", the channel quality data after upgrading as corresponding Physical Resource Block.
13. method as claimed in claim 9 is characterized in that, after said base station resolves went out to have carried in the reporting message n bit sign and the 4th reporting policy sign, the concrete grammar that upgrades the down channel quality data of each Physical Resource Block was:
Select the bit pairing Physical Resource Block of said bitmap intermediate value for " 1 "; In the channel quality data of the Physical Resource Block of selecting; Each bit lower than n all is set to " 0 ", the channel quality data after upgrading as corresponding Physical Resource Block;
Select said bitmap intermediate value to be the pairing Physical Resource Block of bit of " 0 ", subtract " 1 ", the channel quality data after upgrading as corresponding Physical Resource Block on (n+1) bit with the channel quality data of the Physical Resource Block of selecting.
14. a user terminal is characterized in that, comprising: measurement module, reporting information determination module and reporting message sending module, wherein,
Said measurement module is used to measure the down channel quality of each Physical Resource Block, and the measured value that obtains is represented with a plurality of bits, sends to said reporting information determination module;
Said reporting information determination module; Be used to determine the n bit of this each channel quality measurements that reports network side and the reporting policy of this employing; Generate physical resource block descending channel quality reporting message, send to said reporting message sending module;
Said reporting message sending module is used for sending physical resource block descending channel quality reporting message to network side; Carry n bit sign in the said reporting message, it is relevant with the n bit of each channel quality measurements to be used to indicate this to report; Also carry the reporting policy sign, be used to indicate this to report the reporting policy of employing; Also carry bitmap, be used to indicate network side value of reporting last time of each channel quality of storage to be carried out and upgrade operation according to this reporting policy.
15. user terminal as claimed in claim 14 is characterized in that, said reporting information determination module comprises: sub module stored, calculating sub module and decision-making submodule, wherein,
Said sub module stored is used to receive and store the down channel quality measured value of each Physical Resource Block that said measurement module sends;
Said calculating sub module is used to calculate the difference value of the value of reporting and said measured value when adopting each reporting policy, and result of calculation is sent to said decision-making submodule;
Said decision-making submodule is used to select hour corresponding bit and reporting policy of said difference value, reports corresponding bit position and the reporting policy of this employing of each channel quality measurements of base station as this.
16. a network side entity is characterized in that, comprising: reporting message receives parsing module and channel quality update module, wherein,
Said reporting message receives parsing module, is used to receive the physical resource block descending channel quality reporting message that user terminal sends, and parses bit sign, bitmap and the reporting policy sign of carrying in the said reporting message; And analysis result sent to said channel quality update module;
Said channel quality update module is used for according to this reporting policy value of reporting last time of each channel quality of storage being carried out the renewal operation according to said analysis result.
17. network side entity as claimed in claim 16 is characterized in that, also comprises:
Memory module is used to store the down channel quality data of each Physical Resource Block of user terminal to send up.
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| CN1439201A (en) * | 2000-06-02 | 2003-08-27 | 诺基亚公司 | Closed loop feedback system for improved down link performance |
| EP1740006A1 (en) * | 2005-06-27 | 2007-01-03 | Samsung Electronics Co., Ltd. | Dynamic channel allocation method in an OFDMA mobile communication system |
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