CN101411227A - Channel quality reporting method, scheduling method, and communication system, terminal and base station - Google Patents
Channel quality reporting method, scheduling method, and communication system, terminal and base station Download PDFInfo
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Abstract
Provided is a channel quality reporting method for each of terminals constituting a communication system to perform a quality measurement in a system frequency band. In case both a frequency group of better quality than that of the frequency group used in data communications and a frequency GROUP containing that frequency group are not detected, the channel quality information of the frequency group formed of a plurality of frequency groups containing the frequency group used in the data communications is reported. In case both the frequency group of better quality than that of the frequency group used in the data communications and the frequency GROUP containing that frequency group are detected, on the other hand, the channel quality information is reported by making a change into the specific frequency GROUP formed of the frequency groups containing the frequency group of better quality.
Description
Technical field
The present invention relates to a kind of in the communication system that constitutes by at least one base station and a plurality of (comprising one) terminal of in the coverage that this base station covered, existing adoptable channel quality (CQI) method for reporting and scheduling (scheduling) method, particularly relate to a kind of have the function of measuring quality state and use this measurement result dispatch a plurality of communication channels function, in communication system adoptable channel quality reporting method and dispatching method.
Background technology
At present, in 3GPP, at LTE (Long Term Evolution: the research of the wireless network that has adopted new wireless mode under one's name Long Term Evolution).In this wireless mode, on frequency axis, define a plurality of communication channels, the channel (frequency scheduling) on the frequency axis that uses in selecting to communicate by letter according to quality state.In following non-patent literature 1, there is following record: " with channel quality information (hereinafter referred to as CQI) as scheduling one of key element ".
Fig. 9 is the figure of situation of the above-mentioned frequency scheduling in the past of expression, and band system band is divided into frequency pool # 1～#n, is that unit is dispatched with the subframe of time-axis direction.That is, the base station is to select suitable frequency pool to distribute in the cycle each terminal (hereinafter referred to as UE) with the subframe.For example, for UE# 1, dividing frequency group # 1 in two initial subframes, dividing frequency group # 2 in the 5th subframe.This is that it is better than the channel quality of frequency pool # 1 that the state of the channel quality of frequency pool # 2 becomes because of the process along with the time.
Non-patent literature 1:3GPP TR25.814 V1.2.17.1.2.1 joint
Summary of the invention
The problem that invention will solve
Handle in order to carry out above-mentioned scheduling in the past, need be to scheduler (scheduler) report CQI.That is, for (CQI that is measured by UE must be reported to the base station that has scheduler in base station → UE) dispatch to downgoing line.In addition, the full UE of scheduler object uses uplink to come to report continually in time the CQI of whole frequency pools, can improve the throughput of downgoing line thus.
Yet, under the situation of carrying out above-mentioned scheduling processing in the past, when reporting CQI like that as mentioned above, might cause the anxiety of uplink on the contrary, thereby the throughput of uplink is significantly reduced.On the other hand,, preferably reduce the report frequency of CQI, and reduce report amount once for fear of the throughput that reduces uplink.
That is, under the situation of carrying out above-mentioned scheduling processing in the past, need satisfy following opposite requirement: improve downlink throughput capacity, reduce the report amount of uplink.
For example, in document " 3GPP TR25.814 V1.2.17.1.3.1.1.1.1 joint ", recorded and narrated CQI method for reporting described as follows.
1.Only?feedback?information?from?the?top?M?strongest?CQIbands
2.Differential?feedback?information?in?time?or?frequency
3.Bitmap?techniques?indicating?which?bands?reflect?a?reportedCQI?value
4.Hierarchical?Tree?structure?based?approaches
5.Using?a?set?of(orthogonal)functions?to?approximatefrequency?selective?fading?profile(e.g.DCT)
Above-mentioned 2. to carry out a CQI of absolute value report, is reported in the CQI of frequency pool adjacent on time or the frequency with difference.Yet, under the situation that changes very fast (variation of quality amplitude is bigger), also can increase required bit number even carry out difference report, become identical with the situation of the absolute value of reporting full CQI.Above-mentioned 3. and 4. once only report a CQI value, the shortcoming of spended time when exist upgrading full CQI.In addition, (Discrete Cosine Transform: discrete cosine transform), characteristic is relatively poor as can be known for above-mentioned 5. use DCT.In addition, upper M the CQI that above-mentioned 1. report qualities are good, though and compatible good between the frequency scheduling, under the situation of band system band broad, need get bigger M value in order to obtain the scheduler effect, the result causes increasing required report bit number.
The present invention In view of the foregoing finishes, and its purpose is to obtain a kind of channel quality reporting method and dispatching method that reduces the report amount of uplink when keeping downlink throughput capacity.
The scheme that is used to deal with problems
In order to address the above problem and to achieve the goal, the channel quality information that channel quality information report method involved in the present invention makes each terminal obtain for a plurality of channel measurements on the frequency axis to the base station report with scheduling feature in the communication system that is made of at least one base station and a plurality of (comprising one) terminal of existing in the coverage that this base station covered, this channel quality reporting method for example is characterised in that and comprises: the mass measurement step, and all to band system band, or a part that includes the band system band of the frequency pool of using in data communication is carried out mass measurement; And channel quality reporting step, do not detecting the better frequency pool of frequency pool that mass ratio uses and comprising under the situation of frequency grouping of this frequency pool in data communication, report includes the channel quality information that the frequency that is formed by a plurality of frequency pools of the frequency pool used is divided into groups in above-mentioned Data Receiving, on the other hand, detecting the better frequency pool of frequency pool that mass ratio uses and comprising under the situation of frequency grouping of this frequency pool in data communication, switching to the characteristic frequency that forms by a plurality of frequency pools that comprises above-mentioned the second best in quality frequency pool and divide into groups and reporting channel quality information.
The effect of invention
According to the present invention, play the effect that reduces the report amount of uplink when downlink throughput capacity can be kept.
Description of drawings
Fig. 1-the 1st represents the figure of the summary of channel quality reporting method involved in the present invention.
Fig. 1-2 is the figure of the summary of expression channel quality reporting method involved in the present invention.
Fig. 2 is the figure of the example under the frequency pool quantity of the expression Data Receiving situation different with the frequency pool quantity of CQI report.
Fig. 3 is the figure of the structure example of expression base station of execution mode 1 and terminal.
Fig. 4 is the figure of the expression quality comparison process of being undertaken by quality information arrangement portion.
Fig. 5 is the figure of the action sequence of expression execution mode 2.
Fig. 6 is the figure of the structure example of expression base station of execution mode 2 and terminal.
Fig. 7 is the figure of the constructive method of expression frequency grouping.
Fig. 8 is the figure of the constructive method of expression frequency grouping.
Fig. 9 is the figure that represents the situation of frequency scheduling in the past.
Description of reference numerals
11: reception/demodulation section; 12: the received signal analysis unit; 13: scheduling portion; 14: modulation/sending part; 15: data buffering portion; 21: reception/demodulation/measurement section; 22: quality information arrangement portion; The 23:ACK/NACK generating unit; 24: send signal selecting part; 25: modulation/sending part; 26: report switching judging portion.
Embodiment
Below, describe the execution mode of channel quality reporting method involved in the present invention, dispatching method, communication system, terminal and base station with reference to the accompanying drawings in detail.In addition, be not to limit the present invention according to present embodiment.
[execution mode 1]
Fig. 1-the 1st represents the figure of an example of channel quality reporting method involved in the present invention.Each terminal (UE) that constitutes communication system with the base station receives data at time T 1 frequency of utilization group # 1, #2, #3, #4, and also implements the CQI report in the frequency grouping that is formed by frequency pool # 1, #2, #3, #4.In addition, in time T 2,, therefore carry out CQI report (frequency pool # 6, #7, #8, #9) with this frequency grouping while similarly use frequency pool # 1, #2, #3, #4 to receive data, newly detect the grouping of other good frequency pool of channel quality and frequency.Afterwards, in time T 3, on one side frequency of utilization group # 6, #7, #8, #9 as Data Receiving, also implement CQI with frequency pool # 6, #7, #8, #9 on one side and report.
In addition, Fig. 1-2 also is the figure of an example of expression channel quality reporting method involved in the present invention, and is identical with Fig. 1-1 till time T 2.In time T 3, owing to receive, therefore revert to frequency pool # 1, #2, #3, #4 and implement the CQI report with frequency pool # 1, #2, #3, #4 implementation data.In this case, after certain hour, exist once more under the situation of the second best in quality other frequency pool, with the above-mentioned action of similarly carrying out on the time T 2.
In addition, in Fig. 1-1 and Fig. 1-2, the quantity of establishing the frequency pool of Data Receiving does not need consistent with the quantity of the frequency pool of CQI report, the frequency pool of CQI report, is that CQI report grouping is formed by the frequency pool that comprises Data Receiving frequency pool.Fig. 2 is the figure of the example under the different situation of the quantity of the frequency pool reported of quantity and the CQI of the frequency pool of expression Data Receiving.At this, the quantity that shows Data Receiving frequency pool is 2, the quantity of CQI report frequency pool is 4 situation.Wherein,, be made as default, be notified to UE from the wireless network that comprises the base station when UE registers on the wireless system by energized or when having begun communication etc. about form CQI report grouping by several frequency pools.
Fig. 3 be the expression be used to realize channel quality reporting method involved in the present invention communication system, be the figure of the structure example of base station and terminal.In Fig. 3, the base station possesses reception/demodulation section 11, received signal analysis unit 12, scheduling portion 13, modulation/sending part 14 and data buffering portion 15, and terminal (UE) possesses reception/demodulation/measurement section 21, quality information arrangement portion 22, ACK/NACK generating unit 23, sends signal selecting part 24 and modulation/sending part 25.
At first, in UE, in order to measure quality, reception/demodulation/measurement section 21 receives the pilot signal of sending from the base station.At this moment, mass measurement is carried out in all frequency pool (band system band) or a part of frequency pool that include the frequency pool of using in up-to-date Data Receiving.Then, will be transferred to quality information arrangement portion 22 by the quality information (for example, received signal level) that reception/demodulation/measurement section 21 obtains.
Then, in quality information arrangement portion 22, mass ratio is included the better frequency pool of the grouping of the frequency pool of using and comprises the grouping of these frequency pools in Data Receiving existence has or not to be retrieved.Then, according to this result for retrieval, the CQI of notifiable frequency pool sent to send signal selecting part 24.
On the other hand, in reception/demodulation/measurement section 21, go back the data of receiving plane, in this case, decoded result (receiving successfully/fail) is sent to ACK/NACK generating unit 23 to UE.In ACK/NACK generating unit 23, generate ACK or NACK according to the decoded result that obtains.
Then, send signal selecting part 24 and from the CQI that imported and ACK/NACK, select the signal that will send by the timing of predesignating.In addition, the situation that also has the signal that sends both sides.Selected signal is sent to modulation/sending part 25, in modulation/sending part 25, CQI, ACK/NACK or CQI and ACK/NACK is sent to the base station as wireless signal.
In the base station, will send to received signal analysis unit 12 by the signal that reception/demodulation section 11 is accepted.In received signal analysis unit 12, received signal is separated/is identified as CQI, ACK/NACK, other signal, CQI and ACK/NACK information are sent to scheduling portion 13.
Then, the frequency pool that scheduling portion 13 selects the corresponding data that send to distribute according to the CQI that obtains, and determine suitable modulation system, error correction redundancy degree etc.In addition, scheduling portion 13 uses report value in the past for the frequency channels that does not have up-to-date CQI report value except using up-to-date CQI report value.In addition, according to the result of ACK/NACK, judge that the transmission new data still sends the data more than having sent once once more.Then, scheduling portion 13 sends to modulation/sending part 14 together with information and dates such as selected frequency pool, modulation system, error correction redundancy degree.
Then, modulation/sending part 14 sends to UE with the wireless signal that is generated after having carried out error correction, modulation.In addition, in frequency channels that has sent this wireless signal and frequency channels, also suitably insert pilot signal with other purposes use.In addition, 15 pairs in data buffering portion arrive from upper layer, cushion towards the data of each UE.
In addition, when the processing (mass ratio) of the quality information arrangement portion 22 that carries out UE, consider several different methods.For example be following method: the average CQI of the current frequency grouping that will use in the CQI report and the average CQI of other frequency grouping compare.Figure 4 illustrates this method.In Fig. 4, the frequency pool that constitutes current frequency grouping is respectively staggered one, the frequency grouping that is made of four groups respectively is defined as B to M.Current reception data frequency group is #2, #3, and the current frequency of using in the CQI report is grouped into A.This frequency grouping A is compared with other grouping B～M respectively,, then this frequency grouping is made as the object of CQI report next time if detect the frequency grouping that average CQI value is higher than A.In the example of Fig. 4, grouping F becomes the object of CQI report next time.But, be not limited to detected like that as mentioned above frequency grouping and comprise frequency pool with maximum CQI value.
In addition, as other the quality comparative approach that is undertaken by quality information arrangement portion 22, the grouping of for example also considering only will to comprise the frequency pool with maximum CQI value is the method for object as a comparison.In the example of Fig. 4, only be that grouping D, E, F, the G that comprises the frequency pool # 7 of maximum CQI value becomes comparison other.
As described above, the CQI report is limited in the restricted portion that includes the frequency pool of using in Data Receiving usually, under the situation that detects the frequency pool grouping with quality better than it, reports their CQI value.Thus, can reduce the report amount of CQI report, and, therefore not influence throughput owing to send required information (the CQI information of the frequency pool that the scheduler chosen quality is good).Therefore and concentrated frequency pool is distributed to compatible good between the dispatching method of a UE in addition, compare, because the CQI value of the frequency pool that report is concentrated, with the mode of enumerating " 1. " as in the past problem.
In addition, in the present embodiment, by each report regularly (for example with time T 1, T2, the T3 of Fig. 1-1 ... quite) mass ratio that compares object frequency grouping, therefrom detect the frequency grouping of carrying out the CQI report, but being not limited to this, also can not be regularly to carry out mass ratio by above-mentioned each report regularly to make the frequency grouping circulation of carrying out the CQI report but by each report.Specifically, for example under the situation that frequency grouping A～M shown in Figure 4 is divided into groups as report object frequency, as certain report regularly T1 divide into groups A the CQI report, Next Report regularly T2 carry out frequency grouping B the CQI report, Next Report more regularly T3 carry out frequency grouping C the CQI report ... such carry out the CQI report, and Next Report timing in the CQI report of having carried out frequency grouping M, carry out the CQI report of frequency grouping A, later on regularly, similarly make the frequency grouping circulation of carrying out the CQI report by each report.In this case, in quality information arrangement portion 22, do not carry out mass ratio and and just circularly the CQI of notifiable frequency pool or frequency grouping is sent to transmission signal selecting part 24.
In addition, as mentioned above, under the situation that makes the frequency grouping circulation of carrying out the CQI report, do not need the report frequency number of packet in once reporting regularly is defined as one, can once carry out the CQI report yet a plurality of frequency groupings.
[execution mode 2]
Then, the report handoff request of moving as the characteristic of execution mode 2 is described.The comparison that the UE of present embodiment uses Fig. 4 to illustrate, but under the situation that detects the better frequency grouping of quality, not the CQI report of directly carrying out new frequency grouping, but will be used to inform that the report handoff request of its existence is notified to scheduler.
Fig. 5 is the figure of the action sequence of expression execution mode 2.UE measures the quality of each frequency pool by receiving the pilot signal (step S1) that is sent by the base station, further carry out mass ratio illustrated in fig. 4, under the situation that can't detect better frequency grouping, the CQI value (step S2) of the frequency grouping that report is identical with above-mentioned last time of measuring.
Then, with similarly above-mentioned, in UE, receive the pilot signal (step S3) that sends by the base station, further carry out mass ratio illustrated in fig. 4, carried out so far under the situation of the better frequency grouping (frequency pool) of the frequency grouping of CQI report detecting mass ratio, the report handoff request is sent with CQI report so far, and wherein, above-mentioned report handoff request is used to ask to switch to the frequency grouping (step S4) that comprises above-mentioned detected the second best in quality frequency pool.At this moment, as the report handoff request, some in the frequency pool of informing optimum frequency pool and beginning or both.In Fig. 5, show the example of notifying both.In addition, the frequency pool that has maximum CQI value among the new grouping of optimum frequency group representation, beginning frequency pool represent to have the frequency pool (frequency pool with lower frequency) that starts among the frequency grouping (according to the frequency grouping of the explanation decision of Fig. 4) of optimum frequency.In addition, the frequency pool that is not limited to start if can determine grouping, also can be out of Memory.
Then, the scheduler (suitable with scheduling portion 13) of accepting the report handoff request is also considered the situation of other UE, be judged as under the situation favourable for system or the UE that asks, indication (step S5) is switched in the report of sending the switching that is used for the grouping of order report object frequency.In addition, may not switch to frequency grouping, also exist and use the frequency pool situation of, two or grouping more than it that staggers from UE request.In this case, switch the information of adding the beginning frequency pool that scheduler determined in the indication in report.
Then, accept the UE (step S6) when receiving pilot signal that indication is switched in report, carry out CQI report (step S7) for new frequency grouping.In addition, under the situation of not accepting report switching indication, UE proceeds the CQI report for frequency grouping so far.
Fig. 6 is expression and the figure of the structure example of base station of reporting the execution mode 2 that the hand-off process sequential is corresponding and UE.Compare with Fig. 3, appended report switching judging portion 26 among the UE.Report switching judging portion 26 makes the report switching request signal when quality information arrangement portion 22 gets access to the information relevant with the quality comparative result, and sends it to and send signal selecting part 24.In addition, report switching judging portion 26 accepts report from reception/demodulation/measurement section 21 switches index signal, carries out the frequency grouping of CQI report to 26 indications of quality information arrangement portion.On the other hand, in the base station, receiving scheduling portion 13 that report switches index signal is judged as in above-mentioned processing shown in Figure 5 under the favourable situation of system or the UE that asks, allow the switching of report object frequency grouping, afterwards, 14 loopbacks of modulation/sending part are used to indicate the report of the switching of above-mentioned report object frequency grouping to switch indication.
Like this, in present embodiment 2, make scheduling portion also have the final judgement authority of the switching of CQI report.In scheduler, also consider CQI report situation from other UE, the situation favourable as entire system or favourable for the UE that has carried out handoff request, other UE is not had under the situation of bad influence, allow the grouping of CQI report to switch for object UE.Afterwards, dispatch according to the CQI report value of new grouping.Thus, about same frequency grouping, even the situation that for example can't allow at least one side to switch, in addition for the few and situation that under the abominable state of line quality, also can carry out etc. of the transmission data volume of the UE that asks with strong modulation system of anti-wrong ability and error correction redundancy degree sending handoff request simultaneously from a plurality of UE, do not permit, thereby make scheduler algorithms have flexibility.In addition, by keeping the current frequency grouping of carrying out the CQI report, also have the advantage of acquisition with respect to its up-to-date CQI value.And, when the transmission once more of carrying out data,, also have the advantage that can omit the control information that sends to UE from the base station by using the frequency grouping identical with initialization.
In addition, in the explanation of above-mentioned execution mode 1 and execution mode 2, about the switching timing (suitable) of the frequency grouping of implementing the CQI report or the timing (suitable) of report handoff request with execution mode 2 with execution mode 1, be made as the situation that detects the better frequency pool of quality by mass ratio, in the time of still also it only can being defined as the Data Receiving failure.Because the failure of Data Receiving means the quality deterioration of the frequency channels that uses in these data send, therefore can be judged as the frequency pool that is worth in data send, to use and switch to other frequency grouping.On the contrary, under stay-in-grade situation, keep current frequency channels, do not need to report unnecessary information, can realize effective use of radiolink.Wherein, about Data Receiving failure, can be once, but be not limited to this that also can be made as the probability that takes defeat becomes threshold value when above.
In addition, on the contrary, under the situation of Data Receiving failure, be under the situation of loopback NACK, also can not carry out switching, the report handoff request of frequency grouping, and only be defined as when returning ACK.For example, under situation about sending once more, send the data identical once more with initialization, exist thus usually said, can omit the possibility that is used for the required control information of these data of demodulation (modulation system, error correction redundancy degree), in addition, when determined initialization with send once more in use under the situation of constraint item of identical frequency channels, can further omit control information.Thereby, sent under the situation of asking once more the NACK of transmission at UE, do not carry out above-mentioned action (switching of report frequency grouping, report handoff request).
In addition, in above-mentioned execution mode 1 and execution mode 2, formed the frequency grouping of carrying out the CQI report by adjacent frequency pool, but the present invention is not limited thereto, if be predetermined frequency interval, then also can form the frequency grouping (with reference to Fig. 7) of implementing the CQI report by the frequency pool that separates.In this case, while scheduler discern this frequency interval, carry out for the frequency channels of UE and distribute.
In addition, in above-mentioned execution mode 1 and execution mode 2, under the situation that is forming grouping by adjacent frequency pool, as the example of Fig. 4, frequency pool respectively staggered one and define, do not have overlapping grouping (with reference to Fig. 8) but for example also can define.
Utilizability on the industry
As more than, channel quality reporting method involved in the present invention and dispatching method are used for by extremely A few base station and a plurality of (the comprising one) that exist in the coverage that this base station covers are whole In the communication system that end consists of, particularly be applicable to the terminal and the use that possess the measurement quality state This measurement result is dispatched the communication system of the base station of a plurality of communication channels.
Claims (24)
1. channel quality reporting method, in the communication system that constitutes by at least one base station and a plurality of (comprising one) terminal of in the coverage that this base station covered, existing, the channel quality information that this channel quality reporting method makes each terminal obtain for a plurality of channel measurements on the frequency axis to the base station report with scheduling feature, this channel quality reporting method is characterised in that, comprising:
The mass measurement step, a part all to band system band or include the band system band of the frequency pool of using in data communication is carried out mass measurement; And
The channel quality reporting step, do not detecting the better frequency pool of frequency pool that mass ratio uses and comprising under the situation of frequency grouping of this frequency pool in data communication, report includes the channel quality information that the frequency that is formed by a plurality of frequency pools of the frequency pool used is divided into groups in above-mentioned Data Receiving, on the other hand, detecting the better frequency pool of frequency pool that mass ratio uses and comprising under the situation of frequency grouping of this frequency pool in data communication, switching to the specific frequency that forms by a plurality of frequency pools that comprises above-mentioned the second best in quality frequency pool and divide into groups and reporting channel quality information.
2. channel quality reporting method according to claim 1 is characterized in that,
In above-mentioned channel quality reporting step, mean value (data communication channel quality averaged) by the channel quality in each frequency pool of the frequency grouping used in will composition data communication in above-mentioned detection is handled respectively with other frequency grouping in the mean value of channel quality compare, frequency pool that the detection quality is better and frequency are divided into groups.
3. channel quality reporting method according to claim 1 is characterized in that,
In above-mentioned channel quality reporting step, mean value (data communication channel quality averaged) by the channel quality in each frequency pool of the frequency grouping used in will composition data communication in above-mentioned detection is handled respectively with the frequency grouping of the frequency pool that comprises the maximum channel quality that obtains as above-mentioned measurement result in the mean value of channel quality compare, frequency pool that the detection quality is better and frequency are divided into groups.
4. according to claim 1,2 or 3 described channel quality reporting methods, it is characterized in that,
The switching timing of said frequencies grouping is made as the probability that detects the better frequency pool of frequency pool that mass ratio uses and take defeat in above-mentioned data communication when having surpassed defined threshold.
5. according to claim 1,2 or 3 described channel quality reporting methods, it is characterized in that,
The switching timing of said frequencies grouping is made as when detecting better frequency pool of frequency pool that mass ratio uses and Data Receiving success in above-mentioned data communication.
6. channel quality reporting method, in the communication system that constitutes by at least one base station and a plurality of (comprising one) terminal of in the coverage that this base station covered, existing, the channel quality information that this channel quality reporting method makes each terminal obtain for a plurality of channel measurements on the frequency axis to the base station report with scheduling feature, this channel quality reporting method is characterised in that, comprising:
The mass measurement step is all carried out mass measurement to band system band; And
The channel quality reporting step all is divided into a plurality of frequency groupings with the said system frequency band, according to above-mentioned quality measurements, with the said frequencies unit of being grouped into reporting channel quality information.
7. channel quality reporting method, in the communication system that constitutes by at least one base station and a plurality of (comprising one) terminal of in the coverage that this base station covered, existing, the channel quality information that this channel quality reporting method makes each terminal obtain for a plurality of channel measurements on the frequency axis to the base station report with scheduling feature, this channel quality reporting method is characterised in that, comprising:
The mass measurement step is all carried out mass measurement to band system band; And
The channel quality reporting step all is divided into a plurality of frequency groupings with the said system frequency band, regularly makes the frequency grouping circulation of reporting channel quality information by each report.
8. channel quality reporting method, in the communication system that constitutes by at least one base station and a plurality of (comprising one) terminal of in the coverage that this base station covered, existing, the channel quality information that this channel quality reporting method makes each terminal obtain for a plurality of channel measurements on the frequency axis to the base station report with scheduling feature, this channel quality reporting method is characterised in that, comprising:
The mass measurement step, a part all to band system band or include the band system band of the frequency pool of using in data communication is carried out mass measurement;
The handoff request step, do not detecting the better frequency pool of frequency pool that mass ratio uses and comprising under the situation of frequency grouping of this frequency pool in data communication, report includes the channel quality information that the frequency that is formed by a plurality of frequency pools of the frequency pool used is divided into groups in above-mentioned Data Receiving, on the other hand, detecting the better frequency pool of frequency pool that mass ratio uses and comprising under the situation of frequency grouping of this frequency pool in data communication, proceed the report of channel quality information so far, and the switching of request report object frequency grouping makes and comprises above-mentioned the second best in quality frequency pool; And
The channel quality reporting step, under the situation of the switching of having indicated the grouping of report object frequency from above-mentioned base station, report comprises the channel quality information that the characteristic frequency that is formed by a plurality of frequency pools of indicated frequency pool is divided into groups.
9. channel quality reporting method according to claim 8 is characterized in that,
In above-mentioned handoff request step, mean value (data communication channel quality averaged) by the channel quality in each frequency pool of the frequency grouping used in will composition data communication in above-mentioned detection is handled respectively with other frequency grouping in the mean value of channel quality compare, frequency pool that the detection quality is better and frequency are divided into groups.
10. channel quality reporting method according to claim 8 is characterized in that,
In above-mentioned handoff request step, mean value (data communication channel quality averaged) by the channel quality in each frequency pool of the frequency grouping used in will composition data communication in above-mentioned detection is handled respectively with the frequency grouping of the frequency pool that comprises the maximum channel quality that obtains as above-mentioned measurement result in the mean value of channel quality compare, frequency pool that the detection quality is better and frequency are divided into groups.
11. channel quality reporting method according to claim 8 is characterized in that,
In above-mentioned handoff request step, when above-mentioned request, the best frequency pool of notice quality and can determining comprise in the information of frequency grouping of this frequency pool any or its both.
12. the described channel quality reporting method of each according to Claim 8～11 is characterized in that,
The timing that above-mentioned report object frequency grouping is switched in request is made as the probability that detects the better frequency pool of frequency pool that mass ratio uses and take defeat in above-mentioned data communication when having surpassed defined threshold.
13. the described channel quality reporting method of each according to Claim 8～11 is characterized in that,
The timing that above-mentioned report object frequency grouping is switched in request is made as when detecting better frequency pool of frequency pool that mass ratio uses and Data Receiving success in above-mentioned data communication.
14. dispatching method, in the communication system that constitutes by at least one base station and a plurality of (comprising one) terminal of in the coverage that this base station covered, existing, this dispatching method makes the base station dispatch according to the channel quality information that each terminal measures, this dispatching method is characterised in that
By the particular terminal request the better relevant information of frequency pool of the base station basis of switching of report object frequency grouping (forming) of channel quality information frequency pool that notified during in this request, that in current data is communicated by letter, use with mass ratio by a plurality of frequency pools be judged as under the situation favourable for system, allow the switching of above-mentioned report object frequency grouping, to the switching of above-mentioned particular terminal indication this report object frequency grouping.
15. dispatching method according to claim 14 is characterized in that,
Switch to the time under the situation of the different frequency grouping of the frequency grouping of terminal notice in the decision of above-mentioned base station, be used for the information of determining that this frequency that is determined is divided into groups to above-mentioned particular terminal notice in above-mentioned request.
16. a communication system is characterized in that possessing:
A plurality of terminals, these a plurality of terminal enforcements of rights require 1 described channel quality reporting method; And
The base station, it dispatches processing according to the channel quality information that receives from above-mentioned terminal.
17. a communication system is characterized in that possessing:
A plurality of terminals, these a plurality of terminal enforcements of rights require 6 described channel quality reporting methods; And
The base station, it dispatches processing according to the channel quality information that receives from above-mentioned terminal.
18. a communication system is characterized in that possessing:
A plurality of terminals, these a plurality of terminal enforcements of rights require 7 described channel quality reporting methods; And
The base station, it dispatches processing according to the channel quality information that receives from above-mentioned terminal.
19. a communication system is characterized in that possessing:
A plurality of terminals, these a plurality of terminal enforcements of rights require 8 described channel quality reporting methods; And
Base station, its enforcement of rights require 14 described dispatching methods.
20. a terminal is characterized in that,
Enforcement of rights requires 1 described channel quality reporting method.
21. a terminal is characterized in that,
Enforcement of rights requires 6 described channel quality reporting methods.
22. a terminal is characterized in that,
Enforcement of rights requires 7 described channel quality reporting methods.
23. a terminal is characterized in that,
Enforcement of rights requires 8 described channel quality reporting methods.
24. a base station is characterized in that,
Possesses the scheduler that enforcement of rights requires 14 described dispatching methods.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP122968/2006 | 2006-04-27 | ||
| JP2006122968 | 2006-04-27 | ||
| JP169342/2006 | 2006-06-19 |
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| Publication Number | Publication Date |
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| CN101411227A true CN101411227A (en) | 2009-04-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109587703A (en) * | 2017-09-28 | 2019-04-05 | 阿里巴巴集团控股有限公司 | Channel optimization method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109587703A (en) * | 2017-09-28 | 2019-04-05 | 阿里巴巴集团控股有限公司 | Channel optimization method and device |
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