CN101873610B - Method and device for allocating resources - Google Patents
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Abstract
The invention discloses a method and a device for allocating resources. The method comprises: according to system resource condition and the service characteristics of a relay, determining the period of the transmission of first uplink information to each relay node in a relay link, and indicating the time-frequency position of the physical resource block (PRB) use by each set of relay node equipment in an uplink relay subframe; and sending the period of the transmission of the first uplink information and the time-frequency position of the PRB allocated to each set of relay node equipment in the uplink relay subframe to the corresponding set of relay node equipment. The method and the device realize uplink resource allocation in the relay link.
Description
Technical field
The present invention relates to communication technical field, refer to especially a kind of resource allocation methods and device.
Background technology
Mobile communication system in future, three generations (Beyond three Generation for example, B3G) in or advanced Long Term Evolution (LTE-A) system, higher peak data rate and cell throughout will be provided, also need simultaneously larger bandwidth, at present the following unassigned bandwidth of 2GHz seldom, the part or all of bandwidth that the B3G system needs can only be on higher frequency range, for example 3GHz is above seeks.Frequency range is higher, and it is faster that radio wave propagation is decayed, and transmission range is shorter, under the therefore same overlay area, guarantee continuous covering, needs more base station, because the base station has higher cost usually, this can increase the cost of arranging net undoubtedly.In order to solve the Cost Problems of arranging net, each manufacturer and standardization body begin one's study relaying (relay) are incorporated in the cellular system, increase to cover, as shown in Figure 1.In Fig. 1, for evolution base station (eNB) has disposed three relay node equipments (RN), the RN1 that is positioned at cell edge can the Extended Cell edges cover, and the RN2 that is positioned in the middle of the residential quarter can increase capacity, and the RN3 that is positioned at the back, building can solve shadow region communication.
Introduce in the network of relay, the Radio Link that relay is relevant is divided into two parts: access link (accesslink) and repeated link (backhaul link).Access link refers to the Radio Link between UE and the RN; Backhaul link refers to the Radio Link between ownership (donor) eNB and the RN;
The LTE system is the system of a resource-sharing, the physical resource that control information is identical with data sharing, and resource divides that to be equipped with PRB be unit.The main purpose that resource is distributed is exactly that the physical source distributing that will share is to different UEs/RB.The LTE-A system has still introduced RN based on LTE, so the resource distribution is more complicated than the LTE system, needs also to consider that resource is distributed on the backhaul link the resource on considering access link is distributed.Access link is similar to the link between the eNB and UE in the LTE system in the LTE-A system, and resource is distributed can be with reference to the resource allocation policy between the eNB of LTE system and the UE; But backhaul link then and in the LTE system link between eNB and the UE different, the main distinction is that relay can serve a plurality of users simultaneously, mutual information is the information sum of a plurality of UE on the access link, but not for single UE.
The scheduler of LTE system is positioned at the base station, need to know the up data volume that needs transmission of UE when scheduler carries out uplink scheduling, therefore needs UE that the data volume in the buffer memory is reported, i.e. buffer status reporting (buffer state report, BSR).
BSR reports process as follows in the LTE system:
UE has upstream data to send, and has at first judged whether ascending resource license (UL grant), if having, then utilizing this ascending resource to carry out BSR reports, if there is not available ascending resource, then send dispatch request (scheduling request, SR) request ascending resource.SR is divided into (dedicated schedulingrequest, D-SR) and at random access dispatching request (andom access scheduling reques, what D-SR) use is the special-purpose PUCCH resource that RRC distributes as UE, as long as UE have the D-SR resource at first choice for use D-SR resource send SR, only have when reaching the D-SR maximum transmission times or not having to distribute for it in situation of special-purpose D-SR resource and just can use RA-SR.
Respond with logic channel group (radio bear group, RBG) on the BSR and be unit, support maximum 4 RBG, BSR to report in the LTE system and use BSR MAC Control Element (CE), BSR MAC CE form has two kinds: Short BSR and Long BSR.Short BSR is used for only reporting the BSR of a logic channel, and Long BSR is used for reporting the BSR more than 1 logic channel.
At present, also do not have to propose the scheme of distributing for the ascending resource on the repeated link in the prior art, therefore how to distribute be a problem that will solve to the ascending resource on repeated link.
Summary of the invention
The invention provides a kind of resource allocation methods and device, the ascending resource that is implemented on the repeated link distributes.
A kind of resource allocation methods that the embodiment of the invention provides comprises:
Determine that according to the service feature of system resource condition and relaying each relay node equipment on the repeated link sends the cycle of the first uplink information, and the time-frequency domain position that each relay node equipment uses PRB in the uplink relay subframe of indication on described repeated link;
With cycle of transmission the first uplink information of determining and described in uplink relay subframe each relay node equipment use the time-frequency domain position of Physical Resource Block PRB to send to each relay node equipment on the corresponding described repeated link;
Wherein, described system resource condition comprises the number of the relay node equipment of this repeated link, the time-domain position of uplink relay subframe, and each uplink relay subframe of determining is used at most the PRB number of transmission the first uplink information; The service feature of described relaying is the PRB number according to definite relaying needs of the traffic performance of relaying.
A kind of ascending resource distributor that the embodiment of the invention provides comprises:
Be used for determining that according to the service feature of system resource condition and relaying each relay node equipment of a repeated link sends the cycle of the first uplink information, and the time-frequency domain position that each relay node equipment uses Physical Resource Block PRB in the uplink relay subframe of indication on described repeated link;
Transmitting element, what be used for the cycle that will determine and indication uses the time-frequency domain position of Physical Resource Block PRB to send to each corresponding on described repeated link relay node equipment at each relay node equipment of uplink relay subframe;
Description of drawings
Wherein, described system resource condition comprises the number of the relay node equipment of this repeated link, the time-domain position of uplink relay subframe, and each uplink relay subframe of determining is used at most the PRB number of transmission the first uplink information; The service feature of described relaying is the PRB number according to definite relaying needs of the traffic performance of relaying.
The embodiment of the invention is to determine that according to the service feature of system resource condition and relaying each relay node equipment in the repeated link sends the cycle of the first uplink information, the indication time-frequency domain position that each relay node equipment uses Physical Resource Block PRB in uplink relay subframe; Use the time-frequency domain position of PRB to send to each corresponding relay node equipment each relay node equipment in uplink relay subframe of definite cycle and indication.The embodiment of the invention has realized that the ascending resource on repeated link distributes.
Fig. 1 uses schematic diagram for quoting relay;
Fig. 2 is the schematic flow sheet of the method for the embodiment of the invention;
Fig. 3 is a kind of frame structure schematic diagram of radio frames in the TDD system;
Embodiment
The schematic flow sheet with the method for the embodiment of the invention of assignment period BSR that Fig. 4 is;
Fig. 5 is the structural representation of the device of the embodiment of the invention.
The embodiment of the invention is to determine that according to the service feature of system resource condition and relaying each relay node equipment in the repeated link sends the cycle of the first uplink information; Use the time-frequency domain position of Physical Resource Block (PRB) to send to each relay node equipment on the corresponding described repeated link each relay node equipment in the uplink relay subframe on described repeated link of definite cycle and indication.
In embodiments of the present invention, the time-frequency domain position of each relay node equipment use PRB can be identical in uplink relay subframe, also can be different.When each relay node equipment uses the time-frequency domain position of identical PRB, distinguish each relay node equipment with pilot frequency sequence.Described the first uplink information comprises: ascending control information, and/or, upstream data.Described ascending control information comprises that Buffer Status Report (BSR), channel quality indication (CQI) and mixed automatic retransfer request confirm/deny to respond one or more in (ACK/NACK).
Referring to shown in Figure 2, the embodiment of the invention realizes that the detailed process of resource distribution is as follows:
Step 201: determine that according to the service feature of system resource condition and relaying each relay node equipment in the repeated link sends the cycle of the first uplink information, and the time-frequency domain position that each relay node equipment uses Physical Resource Block PRB in the uplink relay subframe of indication on described repeated link.
Here, system resource condition can comprise: the number of the relay node equipment of this repeated link, the time-domain position of uplink relay subframe and each definite uplink relay subframe are used at most the PRB number of transmission the first uplink information, then can be according to the number of the relay node equipment of this repeated link, the time-domain position of uplink relay subframe and the PRB number that each definite uplink relay subframe is used at most transmission the first uplink information, and the service feature of relaying can determine that each relay node equipment sends the cycle of the first uplink information.The service feature of described relaying can be the PRB number according to definite relaying needs of the traffic performance of relaying.
Described each uplink relay subframe is used at most the PRB number of transmission the first uplink information and can determines in the following way:
Determine the number of the PRB that each uplink relay subframe is supported at most according to system bandwidth;
The number of the PRB that support at most according to described each uplink relay subframe and each uplink relay subframe of setting are used at most the percentage of transmission the first uplink information, determine that each uplink relay subframe is used at most the PRB number of transmission the first uplink information.
Step 202: use the time-frequency domain position of Physical Resource Block PRB to send to each relay node equipment on the corresponding described repeated link each relay node equipment in uplink relay subframe of definite cycle and indication.
Each relay node equipment in uplink relay subframe of definite cycle and indication can be used the time-frequency domain position of Physical Resource Block PRB send to each corresponding relay node equipment by the RRC signaling.
Also the cycle of determining can be sent to each corresponding relay node equipment by the RRC signaling, the frequency domain position of each relay node equipment use Physical Resource Block PRB in uplink relay subframe of described indication be sent to each relay node equipment of correspondence by dispatch.
The below thinks that it is example that RN distributes the BSR resource cycle, to being introduced for the method for RN assignment period resource, similar with it to data assignment period resource, cycle mainly determines that by the position of the RN number of supporting and backhaul subframe and the service feature of RN resource size is mainly determined according to backhual sub-frame of uplink number.
For example: frame structure shown in Figure 3 is adopted in the up-downgoing resource distribution of radio frames in the TDD system, and the time-domain position of up backhaul subframe is subframe (subframe) 7 in this radio frames.If system bandwidth is 20MHz, the RN number of serving under donor eNB is 8, represent with RN0, RN1...RN7, suppose that the PRB number that is used for transmission BSR in the sub-frame of uplink is no more than 4% of total PRB number, the BSR cycle of different RN is identical and use different time-frequency positions.
Referring to shown in Figure 4, specifically may further comprise the steps for BSR assignment period resource in the embodiment of the invention:
Step 401: determine the PRB number PRB_NUM_ALL that a uplink relay subframe is supported at most according to system bandwidth.
System bandwidth is in the situation of 20MHz, the PRB number PRB_NUM_ALL=100 that sub-frame of uplink is supported at most.
Step 402: the number PRB_NUM_BSR that the percentage that can be used at most the PRB of transmission BSR in the PRB number PRB_NUM_ALL that support at most according to a uplink relay subframe of determining and the uplink relay subframe determine to be used at most in the uplink relay subframe PRB of transmission BSR are 4, that is: 100 * 4%=4;
Step 403: according to the time-domain position of the number PRB_NUM_BSR that is used at most the PRB of transmission BSR in the uplink relay subframe, uplink relay subframe and the relaying number RN_NUM of this evolution base station service, determine the BSR resource cycle of each relaying, wherein, the BSR resource cycle is the integral multiple of radio frames.
Here, a PRB carries at most the BSR information of a UE, a uplink relay subframe is 4 for the number PRB_NUM_BSR of the PRB that transmits BSR at most, that is to say, can carry at most 4 RN, 2 uplink relay subframe of 8 minimum needs of RN, 2 uplink relay subframe have just determined that the minimum BSR resource cycle is 20ms.
, then can carry out in the following manner resource and distribute according to polling queue each RN:
The periodicity BSR resource of RN0, RN1, RN2 and RN3 is positioned on the subframe (subframe) 7 of radio frames (radio frame) N/N+2/N+4...;
The periodicity BSR resource of RN4, RN5, RN6 and RN7 is positioned on the subframe 7 of radio frame N+1/N+3/N+5...;
The concrete PRB position that each RN uses on each up backhaul subframe can be determined by frequency selective scheduling.
Step 404: using RRC signaling RN is cycle and the time-frequency position of the BSR resource of its distribution.
The RRC signaling format can report configuration information unit notice RN to be cycle and the time-frequency position of the BSR resource of its distribution by the RN buffering area, and ginseng is shown in Table 1, and the RN buffering area reports the configuration information unit to comprise bsr-PRB-ResourceIndex and bsr-Period.In the cycle that certain RRC signaling also can only dispose BSR, concrete PRB position is indicated by dispatch.
| Parameter | Implication |
| ?bsr-PRB-ResourceIndex | The index that is used for the PRB resource of BSR |
| ?bsr-Period | The cycle that BSR reports |
Table 1
After this, if specifying the time-frequency position, RN has BSR to report to be triggered and then carries out BSR in allocated resource and report, and BSR reports form to continue to use the form that reports of LTE system, if do not have BSR to be triggered then utilize the data of this resource transmission RN.
Referring to shown in Figure 5, the embodiment of the invention provides a kind of ascending resource distributor, comprising: resource allocation unit 51, transmitting element 52 and frequency domain determining unit 53.
Resource allocation unit 51, be used for determining that according to the service feature of system resource condition and relaying each relay node equipment on the repeated link sends the cycle of the first uplink information, and the time-frequency domain position that each relay node equipment uses Physical Resource Block PRB in the uplink relay subframe of indication on described repeated link;
Transmitting element 52 is used for cycle of described transmission the first uplink information and describedly uses the time-frequency domain position of PRB to send to each relay node equipment on the corresponding described repeated link at each relay node equipment of uplink relay subframe.
Described resource allocation unit 51 comprises: PRB determining unit 511 and cycle determining unit 512.
PRB determining unit 511 is used for determining that each uplink relay subframe is used at most the PRB number of transmission the first uplink information;
Cycle determining unit 512, be used for the number according to the relay node equipment of this repeated link, the time-domain position of uplink relay subframe and the PRB number that each definite uplink relay subframe is used at most transmission the first uplink information, then determine that according to the service feature of relaying each relay node equipment sends the cycle of the first uplink information; The service feature of described relaying can be the PRB number according to definite relaying needs of the traffic performance of relaying.
Frequency domain determining unit 513 is used to indicate the time-frequency domain position that each relay node equipment uses Physical Resource Block PRB in uplink relay subframe.
Described PRB determining unit 511 comprises: the first determining unit and the second determining unit.
The first determining unit is used for determining the at most number of the PRB of support of each uplink relay subframe according to system bandwidth;
The second determining unit, each uplink relay subframe that is used for the number of the PRB that support at most according to described each uplink relay subframe and setting is used at most the percentage of transmission the first uplink information, determines that each uplink relay subframe is used at most the PRB number of transmission the first uplink information.
It is identical or different that each relay node equipment uses the frequency domain position of PRB in uplink relay subframe.
Described the first uplink information comprises: ascending control information, and/or, upstream data.
The embodiment of the invention has provided the uplink resource allocating method of realizing on the backhaul link in the network of RN is arranged, be RN assignment period ascending resource, this ascending resource both can be used for transmitting uplink control information (BSR/CQI/ACK), also can be used for the transmission of data or while transmitting uplink control information and data, and on backhaul link, can for same RN or the identical running time-frequency resource of different RN distribution, use different pilot frequency sequences to distinguish.
Control information is carried out periodic resources such as BSR distribute, can cancel the SR process in the LTE system, thereby reduce professional propagation delay time, improve the spectrum efficiency of system; Distribute and data are carried out periodic resources, then can reduce the expense of control signal.
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, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (13)
1. resource allocation methods is characterized in that the method may further comprise the steps:
Determine that according to the service feature of system resource condition and relaying each relay node equipment on the repeated link sends the cycle of the first uplink information, and each relay node equipment uses the time-domain position of Physical Resource Block PRB in the uplink relay subframe of indication on described repeated link;
With cycle of described transmission the first uplink information and described in uplink relay subframe each relay node equipment use the time-domain position of PRB to send to each relay node equipment on the corresponding described repeated link;
Wherein, described system resource condition comprises the number of the relay node equipment of this repeated link, the time-domain position of uplink relay subframe, and each uplink relay subframe of determining is used at most the PRB number of transmission the first uplink information; The service feature of described relaying is the PRB number according to definite relaying needs of the traffic performance of relaying.
2. method according to claim 1 is characterized in that, determines that according to the service feature of system resource condition and relaying each relay node equipment on the repeated link sends the cycle of the first uplink information, comprising:
Be used at most the PRB number of transmission the first uplink information and the service feature of relaying according to the number of the relay node equipment of this repeated link, the time-domain position of uplink relay subframe, each definite uplink relay subframe, determine that each relay node equipment sends the cycle of the first uplink information.
3. method according to claim 2 is characterized in that, described each uplink relay subframe is used at most the PRB number of transmission the first uplink information and determines in the following way:
Determine the number of the PRB that each uplink relay subframe is supported at most according to system bandwidth;
The number of the PRB that support at most according to described each uplink relay subframe and each uplink relay subframe of setting are used at most the percentage of transmission the first uplink information, determine that each uplink relay subframe is used at most the PRB number of transmission the first uplink information.
4. method according to claim 1 is characterized in that, it is identical or different that each relay node equipment uses the frequency domain position of PRB in uplink relay subframe.
5. method according to claim 1 is characterized in that, described the first uplink information comprises: ascending control information, and/or, upstream data.
6. method according to claim 5 is characterized in that, described ascending control information comprises that Buffer Status Report BSR, channel quality indicator (CQI) and mixed automatic retransfer request confirm/deny to respond one or several among the ACK/NACK.
7. method according to claim 1, it is characterized in that, with cycle of described transmission the first uplink information and described in uplink relay subframe each relay node equipment use the time-frequency domain position of PRB to send to each relay node equipment on the corresponding described repeated link by the radio resource control RRC signaling.
8. method according to claim 1 is characterized in that, cycle of described transmission the first uplink information is sent to each relay node equipment on the corresponding described repeated link by the RRC signaling;
With described in uplink relay subframe each relay node equipment use the frequency domain position of PRB to send to each relay node equipment on the corresponding described repeated link by media access control MAC layer dispatch.
9. a resource allocation device is characterized in that, comprising:
Resource allocation unit, be used for determining that according to the service feature of system resource condition and relaying each relay node equipment on the repeated link sends the cycle of the first uplink information, and the time-frequency domain position that each relay node equipment uses Physical Resource Block PRB in the uplink relay subframe of indication on described repeated link;
Transmitting element is used for cycle of described transmission the first uplink information and describedly uses the time-frequency domain position of PRB to send to each corresponding on described repeated link relay node equipment at each relay node equipment of uplink relay subframe;
Wherein, described system resource condition comprises the number of the relay node equipment of this repeated link, the time-domain position of uplink relay subframe, and each uplink relay subframe of determining is used at most the PRB number of transmission the first uplink information; The service feature of described relaying is the PRB number according to definite relaying needs of the traffic performance of relaying.
10. device according to claim 9 is characterized in that, described resource allocation unit comprises:
The time-frequency domain determining unit is used to indicate the time-frequency domain position that each relay node equipment uses Physical Resource Block PRB in uplink relay subframe;
The PRB determining unit is used for determining that each uplink relay subframe is used at most the PRB number of transmission the first uplink information;
The cycle determining unit, be used for the number according to the relay node equipment of this repeated link, the time-domain position of uplink relay subframe, the service feature of relaying and the PRB number that each definite uplink relay subframe is used at most transmission the first uplink information, determine that each relay node equipment sends the cycle of the first uplink information.
11. device according to claim 10 is characterized in that, described PRB determining unit comprises:
The first determining unit is used for determining the at most number of the PRB of support of each uplink relay subframe according to system bandwidth;
The second determining unit, each uplink relay subframe that is used for the number of the PRB that support at most according to described each uplink relay subframe and setting is used at most the percentage of transmission the first uplink information, determines that each uplink relay subframe is used at most the PRB number of transmission the first uplink information.
12. device according to claim 9 is characterized in that, it is identical or different that each relay node equipment uses the time-frequency domain position of PRB in uplink relay subframe.
13. device according to claim 9 is characterized in that, described the first uplink information comprises: ascending control information, and/or, upstream data.
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| CN102076021B (en) * | 2010-12-22 | 2013-05-15 | 大唐移动通信设备有限公司 | Transmission resource allocation method and equipment |
| CN108347769B (en) * | 2017-01-24 | 2023-07-11 | 中兴通讯股份有限公司 | Indication method and device for frequency domain position |
| CN109327295B (en) * | 2017-08-01 | 2021-12-17 | 华为技术有限公司 | Data transmission method, network equipment, terminal equipment and communication system |
| CN110035449B (en) | 2018-01-12 | 2021-06-22 | 华为技术有限公司 | Method and device for sending data volume report |
| CN110166204B (en) * | 2018-02-14 | 2022-01-14 | 成都华为技术有限公司 | Resource allocation method and device |
| CN110418413B (en) * | 2018-04-28 | 2022-09-23 | 成都华为技术有限公司 | Signal transmission method applied to relay technology and related equipment |
| US11736975B2 (en) * | 2020-05-15 | 2023-08-22 | Qualcomm Incorporated | Buffer status report transmissions in non-terrestrial networks |
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| CN101374020B (en) * | 2007-08-20 | 2012-11-14 | 中兴通讯股份有限公司 | Centralized bandwidth distribution method for relay network |
| KR101393954B1 (en) * | 2007-08-24 | 2014-05-12 | 삼성전자주식회사 | Apparatus and method for allocating uplink resources in a communication system |
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