CN102291825A - Method for allocating time slot resources - Google Patents
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Abstract
The invention provides a method for allocating time slot resources, which comprises the following steps: a base station allocates time slot resources needed by UE (user equipment) in a current scheduling period; when rest time slot resources which are not allocated exist in the current scheduling period and no new UE needs scheduling in the current scheduling period or the rest time slot resources cannot be scheduled because of lack of configured quantity of HS-SCCHs (high speed signaling control channels), the base station allocates the rest time slot resources to the UE which is currently scheduled according to a preset strategy; and the base station informs the corresponding UE of the allocated rest time slot resources through the HS-SCCHs, so that the UE can carry out data transmission according to the allocated rest time slot resources. With the adoption of the method, the code rate can be lowered, the probability for data retransmission is reduced, the service rate is increased, and the throughput of a system is enhanced.
Description
Technical field
The present invention relates to the mobile communication technology field, refer in particular to a kind of distribution method of time interval resource.
Background technology
Along with the develop rapidly of mobile communication technology, 3G (Third Generation) Moblie (3G) technology has obtained application more and more widely.And in order to strengthen the performance of packet data transmission, improve hardware circuit solution, to adapt to the rapid growth of various value-added services, introduced two kinds of important enhancement techniques respectively in third generation partner program (3GPP): high speed downlink packet inserts (HSDPA) technology and high speed uplink packet inserts (HSUPA) technology.
Wherein, described HSDPA technology is the set of some wireless enhanced technology, comprise adaptive modulation and coding (AMC), mix basic bottom key technologies such as automatic repeat requests (HARQ) and fast dispatch algorithm, can be applied to respectively in Wideband Code Division Multiple Access (WCDMA) (WCDMA) system and TD SDMA (TD-SCDMA) system.Use above-mentioned HSDPA technology can improve effectively system throughput, reduce round trip delay and make the data packet transmission ability of system be further strengthened, thereby make the supported downlink data hardware circuit solution of system be greatly improved.
In above-mentioned HSDPA technology, generally be the transmission that the fast dispatch of different subscriber equipment (UE) is realized downlink data by base station (NodeB).For achieving the above object, introduced new physical channel in the above-mentioned HSDPA technology, having comprised: high speed descending sharing channel (HS-DSCH), High-Speed Shared Control Channel (HS-SCCH) and high-speed shared information channel (HS-SICH).Wherein, described HS-DSCH is mapped on the high-speed physical downlink shared channel (HS-PDSCH) (HS-PDSCH) in physical layer, be used to transmit the downlink data that sends to UE, the spreading factor (SF) of the channel code that each HS-PDSCH uses is fixed as 16, it is the parallel transmission code channel that HS-PDSCH can be divided into 16 downlink datas, simultaneously, described HS-PDSCH also will adopt fixing transmitting power to carry out downlink transfer; Described HS-SCCH is used to carry the scheduling of HS-DSCH and the down channel of Downlink Control Information; Described HS-SICH then is the up channel that is used for carrier signaling information, wherein, can comprise ACK/NACK and channel quality indication information such as (CQI) in the signaling information that is carried.In addition, in above-mentioned HSDPA technology, also will all dispose the following special physical channel (DPCH) of 1 pair of uplink and downlink for each UE that is in connection status, be used for to UE transmission radio resource control information and necessary feedback information, and, make NodeB to carry out Synchronization Control and/or wave beam forming to this UE for NodeB provides necessary reference information.
In the HSDPA technology, the message transmission rate that UE finally can reach is the function of carrier/interface ratio (C/I), therefore, NodeB will make effective signal power (C) get a promotion to the lifting of the down transmitting power of HS-PDSCH, but simultaneously the interference power (I) of adjacent area be got a promotion.Consider that from the whole network angle under certain traffic pattern, the down transmitting power of HS-PDSCH need be obtained certain balance between C and I, so that the throughput of network in general reaches maximum.So, network side generally all needs the operating position of the size according to institute's data quantity transmitted, the CQI that UE reports, present operable time slot and sign indicating number resource and HS-SCCH etc., determines UE shared time slot and code channel resource in a Transmission Time Interval (TTI).
In above-mentioned HSDPA technology, generally all can comprise a plurality of time interval resources in the resource pool, and the scheduler among the NodeB will use method for fast packet scheduling, and the CQI and the required data of carrying out downlink transfer of current this UE that report according to each UE last time, in each dispatching cycle (i.e. TTI) for each UE distributes corresponding time interval resource, to finish the transmission of downlink data.
According to agreement regulation, a HS-SCCH can only be that a UE transmits schedule information in a subframe, and therefore the total quantity of the HS-SCCH that is disposed in carrier wave will determine the number of users upper limit that can dispatch simultaneously in subframe of this carrier wave.In actual applications, the number of the HS-SCCH that is disposed too much will cause can be used for following a resource shrinkage of DPCH channel, thereby makes the minimizing of the HSDPA number of users that the supported while is online; In addition, along with the increase of the number of the HS-SCCH that is disposed, the scheduling gain that system obtains also will reach bottleneck.Therefore, network side generally will come the bar number of configuration schedules channel HS-SCCH according to the dispatching efficiency of reality and the situation that takies physical resource.
Comprehensive above-mentioned various objective factors, in actual application environment, when using above-mentioned time-slot resource distribution method to carry out resource allocation as UE, if it is not very big that UE needs data quantity transmitted, then this UE generally can all not distributed to all time interval resources in the base station in this dispatching cycle (i.e. TTI).And after above-mentioned distributing slot resources is finished, locking treatment will be taked to remaining time interval resource in the base station, even in this dispatching cycle, do not have other UE to dispatch or because HS-SCCH configurable number quantity not sufficient and can't dispatch remaining time interval resource the time, the scheduler of base station can not dispose remaining time interval resource to any one UE (UE that comprises the above-mentioned resource of assigned slot) yet.For example, when having 3 time interval resources in the resource pool, if the UE of current required scheduling has been given with 2 time slot allocation wherein in the base station, then remaining 1 time slot will can not be assigned to any one UE again in this dispatching cycle, thereby make that remaining time interval resource is vacant, can't be fully utilized.
So, in the practical application scene,, still can have the remaining situation of time interval resource in the system even when the HTTP user among each UE occupies the majority.For example, according to the emulation experiment data as can be known, in resource pool, comprise 3 time interval resources, and when having disposed 2 couples of HS-SCCH, even when having 4 HTTP users in each sub-district, remaining time interval resource was still arranged in 24% dispatching cycle, and in 8% dispatching cycle, remained 2 time interval resources.
And on the other hand, in above-mentioned HSDPA technology, because existence and the channel variation disturbed, the re-transmission of data is inevitably, therefore, has also used the HARQ technology in the HSDPA technology, thereby increases the throughput of system by re-transmission and soft merging.Yet, because the system of being taked in the HARQ technology of shutdowning that waits makes the re-transmission of data to produce adverse influence to service transmission rate, if so the probability of re-transmission too high, the expansion of throughput that will restriction system.And to studies show that of emulation experiment data, under identical Carrier interference ratio (C/I) level, when the coding redundancy degree increased (promptly reducing code check), the Block Error Rate of eating dishes without rice or wine (BLER) will significantly reduce, thereby can further reduce retransmission probability.In general, the time interval resource of giving UE when configuration more then can correspondingly reduce code check, thereby reduce retransmission probability.
As from the foregoing, how to effectively utilize above-mentioned remaining time slots resource, thereby reduce code check, to reduce the probability of data re-transmission, improving the throughput of service rate and elevator system, is problem demanding prompt solution in this area, does not also propose concrete solution up to now.
Summary of the invention
The invention provides a kind of distribution method of time interval resource, thereby can reduce code check, reduce the probability of data re-transmission, improve the throughput of service rate and elevator system.
For achieving the above object, the technical scheme among the present invention is achieved in that
A kind of distribution method of time interval resource, this method comprises:
Required time interval resource is distributed for user equipment (UE) in the base station in current dispatching cycle;
In current dispatching cycle, there is remaining time interval resource not to be assigned with, and there is not new UE to dispatch in the current dispatching cycle or because High-Speed Shared Control Channel configurable number quantity not sufficient and can't dispatch remaining time interval resource the time, the base station is given the current UE that is scheduled according to predetermined strategy with remaining distributing slot resources;
The base station is notified corresponding UE by High-Speed Shared Control Channel with the remaining time interval resource that is distributed, and makes UE to carry out transfer of data according to the remaining time interval resource that is distributed.
Described base station comprises to the current UE that is scheduled remaining distributing slot resources according to predetermined strategy:
When having only a UE who has distributed time interval resource in the current dispatching cycle, remaining time interval resource is all distributed to the UE that this has distributed time interval resource.
Described base station comprises to the current UE that is scheduled remaining distributing slot resources according to predetermined strategy:
When the UE that has distributed time interval resource more than two is arranged in the current dispatching cycle, indicate according to each channel quality that has distributed the UE last time of time interval resource to report, remaining distributing slot resources has been distributed the UE of time interval resource to each.
The described time interval resource of distributing to each UE that has distributed time interval resource is calculated by following formula:
Wherein, described N is the number of the UE that distributes time interval resource in the current dispatching cycle, and N 〉=2; Described RTBS
iBe that i has distributed recommendation transmission block size normalization in the channel quality indication that the UE of time interval resource reports to the unit resource piece and to normalize to modulation system simultaneously be the value of quarternary phase-shift keying (QPSK) when modulating; Described RTBS
jBe that j has distributed recommendation transmission block size normalization in the channel quality indication that the UE of time interval resource reports to the unit resource piece and to normalize to modulation system simultaneously be the value of quarternary phase-shift keying (QPSK) when modulating.
Described base station comprises to the current UE that is scheduled remaining distributing slot resources according to predetermined strategy:
When the UE that has distributed time interval resource more than two is arranged in the current dispatching cycle, indicate according to each channel quality that has distributed the UE last time of time interval resource to report, give the poorest UE that distributes time interval resource of channel quality with remaining distributing slot resources.
Before the base station was given the current UE that is scheduled according to predetermined strategy with remaining distributing slot resources, this method further comprised:
The base station will judge whether also have remaining time interval resource not to be assigned with in current dispatching cycle, and whether whether judge does not have new UE to dispatch or exist owing to High-Speed Shared Control Channel configurable number quantity not sufficient to dispatch remaining time interval resource in the current dispatching cycle.
A kind of distribution method of time interval resource is provided among the present invention in summary.In the distribution method of described time interval resource, owing in current dispatching cycle, there is remaining time interval resource not to be assigned with, and there is not new UE to dispatch in the current dispatching cycle or because HS-SCCH configurable number quantity not sufficient and can't dispatch remaining time interval resource the time, the current UE that is scheduled can be given with remaining distributing slot resources according to predetermined strategy in the base station, thereby can reduce code check, reduce the probability of data re-transmission, improve the throughput of service rate and elevator system.
Description of drawings
Fig. 1 is the schematic flow sheet of the distribution method of the time interval resource in the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer, the present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
The invention provides a kind of distribution method of time interval resource, in the method, at first, required time interval resource is distributed for UE in the base station in current dispatching cycle; Then, be not assigned with as remaining time interval resource, and there are not this dispatching cycle other UE to dispatch or because HS-SCCH configurable number quantity not sufficient and can't dispatch remaining time interval resource the time, give the current UE that is scheduled with remaining distributing slot resources, thereby can reduce code check effectively, increase the coding redundancy degree, reduce the probability of data re-transmission, improve the throughput of service rate and elevator system.
Fig. 1 is the schematic flow sheet of the distribution method of the time interval resource in the embodiment of the invention.As shown in Figure 1, in the distribution method of time interval resource in the present invention, mainly comprise step as described below:
In this step, the base station can be that corresponding UE distributes required time interval resource in current dispatching cycle.Specifically, the HSDPA scheduler of base station can be according to the CQI (carrying the modulation system of recommendation and the transmission block size of recommendation in this CQI) that reports by HS-SICH before the UE, wish the information such as BLER that reach, and the UE that determines the UE of required scheduling in this subframe and this required scheduling according to scheduling rule can data quantity transmitted in the unit physical resource; Then, be the required physical resource of this UE distribution according to information such as the size of data volume in the pairing down buffer storage of UE of this required scheduling, UE abilities again.Wherein, described scheduling rule can be that polling dispatching (RR), direct ratio equity dispatching (PF), the maximum C/I that uses always dispatches scheduling rules such as (MAX C/I).In addition, simple for what realize, will be that least unit is distributed physical resource in an embodiment of the present invention with the time slot, therefore, and in the following description, the described time interval resource unit of being physical resource.
Yet, in actual application environment, when data volume in the down buffer storage of UE when not being very big, system generally can all not distribute to this UE with all available time slot resources, (for example will appear as physical resource that this UE distributed time slot resource can use than system this moment, the HS-PDSCH resource) few situation, thus make and will remain the time interval resource that some are not assigned to UE in the system.In addition, if also have other UE need dispatch and also have remaining time interval resource not to be assigned with in current dispatching cycle, but the HS-SCCH that system disposed be when having used up, and above-mentioned remaining time interval resource also can't be assigned to new UE.
Therefore, in an embodiment of the present invention, can handle accordingly by following step 102 pair above-mentioned remaining time interval resource, to utilize remaining time interval resource fully.
In the HSDPA technology, because the physical resource that UE can use (is the physical resource that system assignment is given UE, for example, the HS-PDSCH resource) be to inform this UE's by the scheduler unified distribution back of base station and by HS-SCCH, simultaneously, the scheduler of this base station is also known and is the total quantity of the HS-SCCH that UE disposed in this sub-district, whether therefore, the scheduler of base station can be informed in has remaining time interval resource not to be assigned with in current dispatching cycle, whether also have other UE to dispatch and whether exist because HS-SCCH configurable number quantity not sufficient and the situation that can't dispatch remaining time interval resource.For example, during the summation of the time interval resource that can use less than system when the summation of the time interval resource of distributing to UE, the base station can judge to also have remaining time interval resource not to be assigned with in current dispatching cycle.
So, in this step, the base station at first will judge whether also have remaining time interval resource not to be assigned with in current dispatching cycle, and whether whether also need judge does not then have new UE to dispatch or exist because HS-SCCH configurable number quantity not sufficient and the situation that can't dispatch remaining time interval resource in the current dispatching cycle.In current dispatching cycle, there is remaining time interval resource not to be assigned with, and there is not new UE to dispatch in the current dispatching cycle or because HS-SCCH configurable number quantity not sufficient and can't dispatch remaining time interval resource the time, the current UE that is scheduled can be given with remaining distributing slot resources according to predetermined strategy in the base station.
Below, will illustrate how to give the current UE that is scheduled with remaining distributing slot resources in the mode of specific embodiment according to predetermined strategy.
Embodiment one
In specific embodiments of the invention, above-mentioned according to predetermined strategy with remaining distributing slot resources give the current UE that is scheduled can for: when having only a UE who has distributed time interval resource in the current dispatching cycle, remaining time interval resource is all distributed to the UE that this has distributed time interval resource.
Specifically, owing in current dispatching cycle, have only a UE to be assigned with time interval resource, and there is not new UE to dispatch in the current dispatching cycle or because HS-SCCH configurable number quantity not sufficient and (for example can't dispatch remaining time interval resource, when system has only disposed one when being used to transmit the HS-SCCH of schedule information, in a dispatching cycle, can only dispatch a UE), at this moment, the UE that this has distributed time interval resource can all be distributed to remaining time interval resource in the base station, thereby makes remaining time interval resource to be fully utilized.
Embodiment two
In specific embodiments of the invention, above-mentioned according to predetermined strategy with remaining distributing slot resources give the current UE that is scheduled can for: when the UE that has distributed time interval resource more than two is arranged in the current dispatching cycle, distributed the CQI that the UE last time of time interval resource reports according to each, remaining distributing slot resources has been distributed the UE of time interval resource to each.
Specifically, if the UE that has distributed time interval resource more than two is arranged in the current dispatching cycle, at this moment, the channel quality condition that each has distributed the UE of time interval resource can be known according to each CQI that has distributed the UE last time of time interval resource to report in the base station, thereby according to each channel quality condition of UE of having distributed time interval resource with remaining distributing slot resources to each UE that has distributed time interval resource, the time interval resource that is assigned with that the poor more UE that makes channel quality obtains from described remaining time interval resource is many more.
For example, if be located at a total individual UE who has distributed time interval resource of N (N 〉=2) in the current dispatching cycle, then i (i=1,2 ..., N) the individual extra time interval resource that UE obtained of time interval resource that distributed can be determined according to formula as described below:
Wherein, N is the number of the UE that distributes time interval resource in the current dispatching cycle, described RTBS
i(or RTBS
j) be that recommendation transmission block size normalization among the CQI that reports of the individual UE that has distributed time interval resource of i (or j) is to the unit resource piece and the value when normalizing to modulation system simultaneously and being quarternary phase-shift keying (QPSK) modulation (QPSK).
In addition, in technical scheme of the present invention, the method of salary distribution that can also use other (for example, carry out the distribution of time interval resource according to weighted average relevant etc. with channel quality information) remaining distributing slot resources has been distributed the UE of time interval resource to each, the concrete method of salary distribution does not repeat them here.
Embodiment three
In specific embodiments of the invention, above-mentioned according to predetermined strategy with remaining distributing slot resources give the current UE that is scheduled can for: when the UE that has distributed time interval resource more than two is arranged in the current dispatching cycle, distributed the CQI that the UE last time of time interval resource reports according to each, given the poorest UE that distributes time interval resource of channel quality remaining distributing slot resources.
Specifically, if the UE that has distributed time interval resource more than two is arranged in the current dispatching cycle, then the channel quality condition that each has distributed the UE of time interval resource can be known according to each CQI that has distributed the UE last time of time interval resource to report in the base station, and from the above-mentioned UE that has distributed time interval resource, determine the poorest UE that distributes time interval resource of information quality according to the channel quality condition of each UE, then remaining time interval resource is all distributed to the poorest UE that distributes time interval resource of above-mentioned channel quality, thereby made remaining time interval resource to be fully utilized.
Specifically, in an embodiment of the present invention, corresponding UE can be notified with the remaining time interval resource that is distributed by HS-SCCH in the base station, UE can know that according to above-mentioned notice which subframe the remaining time interval resource that is assigned with is positioned at, uses the information such as which code channel of which time slot, thereby can utilize the above-mentioned remaining time interval resource that distributes to carry out corresponding transfer of data, so that above-mentioned remaining time interval resource can be fully utilized.
In summary, by aforesaid step 101～103, remaining time interval resource can reasonably be distributed to the current UE that is scheduled in the base station, thereby makes remaining time interval resource to be fully utilized.For example, according to actual experiment as can be known, under the small data quantity service conditions,, can promote network throughput effectively in general, reduce the BLER of UE though use the distribution method of above-mentioned time interval resource that the interference of some time slot is increased.For example, according to carrying out the emulation experiment data as can be known in the experimental data, if in a same in flakes HSDPA sub-district frequently, system assignment a resource pool that comprises 3 time interval resources (wherein said 3 time slots can be used time slot 3 respectively, time slot 4 and time slot 5 are represented) and 1 SCCH, and all have 4 HTTP users in each sub-district in the described HSDPA sub-district, after the distribution method of the time interval resource of then stating in the use, the time that the user opens webpage is exponential distribution, be 1 second (S) average time, open at every turn webpage data volume be 40Kbits, duty ratio is 62.5%, and simultaneously, the BLER of UE drops to present 2.7% from original 6.6%.Hence one can see that, compares with time-slot resource distribution method of the prior art, used the professional average bandwidth after the distribution method of above-mentioned time interval resource to obtain promoting significantly, and the time that the user opens webpage also obviously shortens.Hence one can see that, by using the distribution method of above-mentioned time interval resource, can reduce code check effectively really, increases the coding redundancy degree, reduces the probability of data re-transmission, improves the throughput of service rate and elevator system.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (6)
1. the distribution method of a time interval resource is characterized in that, this method comprises:
Required time interval resource is distributed for user equipment (UE) in the base station in current dispatching cycle;
In current dispatching cycle, there is remaining time interval resource not to be assigned with, and there is not new UE to dispatch in the current dispatching cycle or because High-Speed Shared Control Channel configurable number quantity not sufficient and can't dispatch remaining time interval resource the time, the base station is given the current UE that is scheduled according to predetermined strategy with remaining distributing slot resources;
The base station is notified corresponding UE by High-Speed Shared Control Channel with the remaining time interval resource that is distributed, and makes UE to carry out transfer of data according to the remaining time interval resource that is distributed.
2. method according to claim 1 is characterized in that, described base station comprises to the current UE that is scheduled remaining distributing slot resources according to predetermined strategy:
When having only a UE who has distributed time interval resource in the current dispatching cycle, remaining time interval resource is all distributed to the UE that this has distributed time interval resource.
3. method according to claim 1 is characterized in that, described base station comprises to the current UE that is scheduled remaining distributing slot resources according to predetermined strategy:
When the UE that has distributed time interval resource more than two is arranged in the current dispatching cycle, indicate according to each channel quality that has distributed the UE last time of time interval resource to report, remaining distributing slot resources has been distributed the UE of time interval resource to each.
4. method according to claim 3 is characterized in that, the described time interval resource of distributing to each UE that has distributed time interval resource is calculated by following formula:
Wherein, described N is the number of the UE that distributes time interval resource in the current dispatching cycle, and N 〉=2; Described RTBS
iBe that i has distributed recommendation transmission block size normalization in the channel quality indication that the UE of time interval resource reports to the unit resource piece and to normalize to modulation system simultaneously be the value of quarternary phase-shift keying (QPSK) when modulating; Described RTBS
jBe that j has distributed recommendation transmission block size normalization in the channel quality indication that the UE of time interval resource reports to the unit resource piece and to normalize to modulation system simultaneously be the value of quarternary phase-shift keying (QPSK) when modulating.
5. method according to claim 1 is characterized in that, described base station comprises to the current UE that is scheduled remaining distributing slot resources according to predetermined strategy:
When the UE that has distributed time interval resource more than two is arranged in the current dispatching cycle, indicate according to each channel quality that has distributed the UE last time of time interval resource to report, give the poorest UE that distributes time interval resource of channel quality with remaining distributing slot resources.
6. method according to claim 1 is characterized in that, before the base station was given the current UE that is scheduled according to predetermined strategy with remaining distributing slot resources, this method further comprised:
The base station will judge whether also have remaining time interval resource not to be assigned with in current dispatching cycle, and whether whether judge does not have new UE to dispatch or exist owing to High-Speed Shared Control Channel configurable number quantity not sufficient to dispatch remaining time interval resource in the current dispatching cycle.
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| CN104581952A (en) * | 2013-10-25 | 2015-04-29 | 中兴通讯股份有限公司 | Associated-dedicated physical channel code resource sharing method and device |
| CN110621072A (en) * | 2019-09-29 | 2019-12-27 | 京信通信系统（中国）有限公司 | Resource scheduling method, device, base station equipment and storage medium |
| CN112399530A (en) * | 2019-08-16 | 2021-02-23 | 中国移动通信有限公司研究院 | Data transmission method, device, related equipment and storage medium |
| CN113938913A (en) * | 2020-07-14 | 2022-01-14 | 中国联合网络通信集团有限公司 | Resource allocation optimization method and device |
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| CN102291825B (en) | 2014-02-26 |
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