CN101801095A - Method for configuring physical downlink control channel, base station and user equipment - Google Patents
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Abstract
The invention provides a method for configuring physical downlink control channel (PDCCH), a base station and user equipment (UE). The base station configures a PDCCH on each subframe of each member carrier in aggregated carriers by adopting the pre-established scheduling relationship, wherein the scheduling relationship ensures at least one PDCCH is not on the same member carrier with the resources scheduled by the PDCCH. The base station of the invention can allocate the member carrier suitable for data transmission for the UE according the actual demand and configure the resource scheduling information of the member carrier in the PDCCH monitored by the UE, thus having higher scheduling flexibility. Only one PDCCH is configured on one member carrier, thus dispensing with changing the format of original PDCCH signaling, maximally reusing design of the long term evolution (LTE) system and reducing the blind detection complexity of the UE.
Description
Technical field
The present invention relates to mobile communication technology, particularly a kind of method of configuring downlink physical control channel, base station and user terminal.
Background technology
In Long Term Evolution (LTE) system and wireless communication system before thereof, sub-district can only corresponding carrier wave, and the maximum bandwidth of this carrier wave is 20MHz usually.In enhancing Long Term Evolution (LTE-A) system of follow-up proposition, the peak rate of system requires than LTE system huge raising has been arranged, and requires to reach descending 1Gbps, up 500Mbps.On the 20MHz of a carrier wave, can't satisfy the demands, therefore, introduced carrier aggregation (CA in the LTE-A system, Carrier Aggregation) technology, promptly in a sub-district continuous or discontinuous a plurality of carrier aggregation is the UE service together simultaneously, usually a plurality of carrier waves with polymerization are called member carrier, and each member carrier is no more than 20MHz usually.As shown in Figure 1, can be in a LTE-A sub-district a plurality of (among the figure be example with 4) member carrier be carried out polymerization, base station and UE can be in the enterprising line data transmission of a plurality of member carriers of polymerization, to improve throughput of system.
Downlink physical control channel (PDCCH, Physical Downlink Control Channel) is used to be carried as the resource scheduling information that UE distributes, each UE monitors the PDCCH that distributes for self, and obtain resource scheduling information, only can be at the indicated running time-frequency resource transmitting data of this resource scheduling information.Comprise following two kinds of schemes at present in the PDCCH allocation plan at the LTE-A system:
First kind of scheme: all dispose PDCCH on each member carrier of polymerization carrier wave, this PDCCH only is used to dispatch the resource of this member carrier, and its scheduling relation as shown in Figure 2.This scheme has been reused the design of LET system to greatest extent, do not need to define extra PDCCH structure and signaling format, agreement is changed little, can support independently link circuit self-adapting of each carrier wave flexibly, and, if the PDCCH on a certain member carrier of UE omission or false retrieval, the PDCCH on other member carrier is unaffected.But, this method is relatively poor for the dispatching flexibility of resource, influences such as channel quality in view of UE ability, volume of transmitted data and each member carrier, suitable UE carries out the member carrier of transfer of data and the member carrier of UE monitoring may not be same member carrier, because PDCCH only is used for the resource of dispatching office at member carrier in this scheme, therefore, UE just is limited in the member carrier transmitting data monitored, may bring relatively poor transfer of data effect.
Second kind of scheme: the different member carrier resource of a plurality of independently PDCCH scheduling of configuration on one of them member carrier of polymerization carrier wave, its scheduling relation as shown in Figure 3, this scheme can be supported independently link circuit self-adapting of each carrier wave equally, and PDCCH of omission or false retrieval does not influence the data dispatch on other member carrier.But, owing on a member carrier, disposed a plurality of PDCCH, be respectively applied for which member carrier of scheduling in order to distinguish each PDCCH, need in PDCCH, increase new Downlink Control Information (DCI, Downlink Control Information) form is indicated the member carrier of being dispatched, correspondingly, UE need carry out blind check to each PDCCH, has increased the blind check complexity of UE; Because a plurality of PDCCH of configuration bring difficulty for the physical source distributing of control area on this member carrier on the member carrier, and the form that needs to change original PDCCH is indicated the member carrier of being dispatched.
As can be seen, all there are some shortcomings in above-mentioned two kinds of schemes, with this, need provide a kind of new PDCCH collocation method in the advantage that possesses above-mentioned two kinds of schemes, can have higher dispatching flexibility, bring lower blind check complexity, not change the signaling format of original PDCCH to UE.
Summary of the invention
In view of this, the invention provides method, base station and the UE of a kind of PDCCH of configuration,, do not change the signaling format of original PDCCH so that have higher dispatching flexibility, bring lower blind check complexity to UE.
A kind of method that disposes PDCCH, this method comprises:
The scheduling relation of setting up is in advance adopted in the base station, PDCCH of configuration on each subframe of each member carrier in the polymerization carrier wave; Wherein, described scheduling relation makes and exists a PDCCH and this PDCCH institute scheduled resources at least not on same member carrier.
A kind of base station, this base station comprises: scheduling concerns acquiring unit and PDCCH dispensing unit;
Described scheduling concerns acquiring unit, is used to obtain the scheduling relation of setting up in advance, and wherein, described scheduling relation makes and exists a PDCCH and this PDCCH institute scheduled resources at least not on same member carrier;
Described PDCCH dispensing unit is used for concerning the scheduling relation that acquiring unit obtains according to described scheduling, PDCCH of configuration on each subframe of each member carrier in the polymerization carrier wave.
A kind of UE, this UE comprises: channel-monitoring unit, carrier wave determining unit and data transmission unit;
Described channel-monitoring unit is used to monitor PDCCH;
Described carrier wave determining unit is used for the scheduling relation that adopts according to the base station, determines the member carrier in the polymerization carrier wave that PDCCH dispatched that described channel-monitoring unit listens to;
Described data transmission unit is used for the resource scheduling information of carrying according to the PDCCH that described channel-monitoring unit listens to, the member carrier transmitting data of determining in described carrier wave determining unit;
Wherein, described scheduling relation makes and exists a PDCCH and this PDCCH institute scheduled resources at least not on same member carrier.
As can be seen from the above technical solutions, by above description as can be seen, utilize the present invention, scheduling relation between the member carrier can be dispatched according to the pre-configured PDCCH of the demand of reality place member carrier and this PDCCH in the base station, in this scheduling relation, the base station can select to carry out the member carrier of transfer of data neatly for UE, the base station is according to this scheduling of setting up in advance relation, and the PDCCH that disposes on the member carrier that UE monitors can be used to be scheduling to the member carrier resource of carrying out transfer of data that this UE selects.In addition,, therefore, can not change the form of original PDCCH signaling, reuse the design of LTE system to greatest extent owing on each subframe of a member carrier, only dispose a PDCCH.Correspondingly, the scheduling relation that UE can adopt according to the base station determines that the member carrier that PDCCH dispatched that listens to, base station need not in PDCCH by increasing the member carrier that new DCI form indication is dispatched, thereby has reduced the blind check complexity of UE.
Description of drawings
Fig. 1 is the polymerization carrier wave schematic diagram of LTE-A system;
Fig. 2 is first kind of PDCCH allocation plan schematic diagram of the prior art;
Fig. 3 is second kind of PDCCH allocation plan schematic diagram of the prior art;
Fig. 4 concerns schematic diagram for the scheduling that a kind of PDCCH of configuration adopted that the embodiment of the invention provides;
Fig. 5 concerns schematic diagram for the another kind configuration scheduling that PDCCH adopted that the embodiment of the invention provides;
The architecture of base station figure that Fig. 6 provides for the embodiment of the invention;
The UE structure chart that Fig. 7 provides for the embodiment of the invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
Method provided by the invention mainly comprises: the scheduling relation of setting up is in advance adopted in the base station, PDCCH of configuration on each subframe of each member carrier in the polymerization carrier wave; Wherein, described scheduling relation makes and exists a PDCCH and this PDCCH institute scheduled resources at least not on same member carrier.
In said method, the scheduling relation can be set up by the agreement of agreement in advance according to base station and UE, and the base station concerns according to the identical scheduling of the agreement employing of agreement with UE.The base station also can be set up the scheduling relation in real time, and is notified to UE by the scheduling relation that system broadcasts or high-level signaling will be set up; The base station can be according to the demand of reality, for example according to the factors such as channel quality of ability, volume of transmitted data and each member carrier of UE, for UE selects to be fit to carry out the member carrier of transfer of data, and set up member carrier that this UE monitors in advance and concern for the scheduling between the member carrier that carries out transfer of data of UE selection.In this scheduling relation, the base station can select to carry out the member carrier of transfer of data neatly for UE.The base station disposes PDCCH according to this scheduling of setting up in advance relation on the member carrier that UE monitors, this PDCCH can be used to be scheduling to the member carrier resource of carrying out transfer of data that this UE selects.
Lift a specific embodiment below, as shown in Figure 4, suppose to constitute a polymerization carrier wave by 5 member carrier polymerizations in the LTE-A system among this embodiment, the scheduling that the base station is set up is closed: the PDCCH on the member carrier 1 is used to dispatch resource on the member carrier 2, PDCCH on the member carrier 2 is used to dispatch the resource on the member carrier 1, PDCCH on the member carrier 3 is used to dispatch the resource on the member carrier 3, PDCCH on the member carrier 4 is used to dispatch the resource on the member carrier 5, and the PDCCH on the member carrier 5 is used to dispatch the resource on the member carrier 4.
Wherein, scheduling relation can be based on the sub-district, promptly all adopts identical scheduling relation at all UE in the whole sub-district, and will dispatch and concern by Cell Broadcast CB and send to all UE in the sub-district; Also can be based on UE, promptly can adopt different scheduling relations, and should dispatch by each UE exclusive high-level signaling and to concern and send to each UE at different UEs.
The base station is closed to tie up on each member carrier according to above-mentioned scheduling and is disposed PDCCH, because above-mentioned scheduling relation adopts the agreement agreement, perhaps the base station sends to UE by system broadcasts or high-level signaling, therefore, need not in PDCCH, to carry the member carrier information that this PDCCH dispatches, promptly need not in PDCCH, to increase new DCI form and dispatch which member carrier, thereby reduced the blind check complexity of UE to indicate this PDCCH.
Correspondingly, after UE listened to PDCCH, the scheduling of adopting according to the base station was closed to tie up to and is determined the member carrier that this PDCCH is dispatched in the polymerization carrier wave, and this member carrier transmitting data of determining according to the resource scheduling information of carrying among this PDCCH; Wherein, described scheduling relation makes and exists a PDCCH and this PDCCH institute scheduled resources at least not on same member carrier.
Wherein, UE can obtain the scheduling relation that adopts the base station according to the agreement of agreement, also obtains the scheduling relation that adopts the base station system broadcasts that can send from the base station or the high-level signaling.
In addition, above-mentioned scheduling relation can promptly have different scheduling relations respectively at each subframe at each subframe, can be the cycle with a subframe also, and each subframe adopts identical scheduling relation.
Perhaps, above-mentioned scheduling relation can be the cycle with N subframe, and wherein N is a positive integer.Each subframe within the one-period can adopt different scheduling relations, and as shown in Figure 5, this corresponding relation is the cycle with a field, and 5 subframes in this field can adopt different scheduling relations respectively.In this case, the scheduling relation that adopt the base station can be a scheduling relation configuration pattern, this configuration pattern is to repeat in the cycle with a field, and the scheduling relation in each subframe in the configuration pattern between the member carrier that member carrier and this PDCCH dispatched at PDCCH place can be different.At this moment, the scheduling relation that adopt the base station can adopt the agreement agreement equally, perhaps notifies UE by the mode of system broadcasts or high-level signaling.
When the scheduling relation that adopts when the base station changed, the scheduling relation after also can will changing by the mode of system broadcasts or high-level signaling was notified to UE.
More than be the detailed description that method provided by the invention is carried out, below base station provided by the present invention and UE be described in detail.The architecture of base station figure that Fig. 6 provides for the embodiment of the invention, as shown in Figure 6, this base station can comprise: scheduling concerns acquiring unit 601 and PDCCH dispensing unit 602.
Scheduling concerns acquiring unit 601, is used to obtain the scheduling relation of setting up in advance, and wherein, the scheduling relation makes and exists a PDCCH and this PDCCH institute scheduled resources at least not on same member carrier.
Wherein, scheduling concerns that the scheduling relation that acquiring unit 601 obtains is the cycle with N subframe, and each subframe in each cycle adopts identical scheduling relation or different scheduling relations, and wherein, N is a positive integer.Being that above-mentioned scheduling relation can be the cycle with a subframe, can be the cycle with a plurality of subframes also, and at this moment, each subframe in the one-period can adopt different scheduling relations.
In addition, scheduling concerns that acquiring unit 601 can obtain the scheduling relation of setting up in advance according to the agreement agreement, perhaps obtains the scheduling relation of setting up in advance according to the actual requirements.
Further, this base station can also comprise: scheduling concerns notification unit 603, is used for scheduling is concerned that the scheduling that acquiring unit 601 obtains concerns that the mode by system broadcasts or high-level signaling is notified to UE.
The UE structure chart that Fig. 7 provides for the embodiment of the invention, as shown in Figure 7, this UE can comprise: channel-monitoring unit 701, carrier wave determining unit 702 and data transmission unit 703.
Channel-monitoring unit 701 is used to monitor PDCCH.
Carrier wave determining unit 702 is used for the scheduling relation that adopts according to the base station, determines the member carrier in the polymerization carrier wave that PDCCH dispatched that channel-monitoring unit 701 listens to.
Wherein, scheduling relation makes and exists a PDCCH and this PDCCH institute scheduled resources at least not on same member carrier.
Further, this UE can also comprise: scheduling concerns acquiring unit 704, be used for obtaining the scheduling relation that adopts the base station according to the agreement agreement, perhaps obtain the scheduling relation that adopts the base station system broadcasts that sends from the base station or the high-level signaling, and the scheduling that will obtain relation offers carrier wave determining unit 702.
Wherein, scheduling concerns that the scheduling relation that acquiring unit 704 obtains is the cycle with N subframe, and each subframe in each cycle adopts identical scheduling relation or different scheduling relations; Wherein, N is a positive integer.The member carrier transmitting data that data transmission unit 703 is determined in the PDCCH place subframe that listens to.
By above description as can be seen, utilize the present invention, scheduling relation between the member carrier can be dispatched according to the pre-configured PDCCH of the demand of reality place member carrier and this PDCCH in the base station, in this scheduling relation, the base station can select to carry out the member carrier of transfer of data neatly for UE, the base station is according to this scheduling of setting up in advance relation, and the PDCCH that disposes on the member carrier that UE monitors can be used to be scheduling to the member carrier resource of carrying out transfer of data that this UE selects.In addition,, therefore, can not change the form of original PDCCH signaling, reuse the design of LTE system to greatest extent owing on a member carrier, only dispose a PDCCH.Correspondingly, the scheduling relation that UE can adopt according to the base station determines that the member carrier that PDCCH dispatched that listens to, base station need not the member carrier of being dispatched by new DCI form indication in PDCCH, thereby has reduced the blind check complexity of UE.
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 (12)
1. the method for a configuring downlink physical control channel PDCCH is characterized in that, this method comprises:
The scheduling relation of setting up is in advance adopted in the base station, PDCCH of configuration on each subframe of each member carrier in the polymerization carrier wave; Wherein, described scheduling relation makes and exists a PDCCH and this PDCCH institute scheduled resources at least not on same member carrier.
2. method according to claim 1 is characterized in that, described scheduling relation is the cycle with N subframe, and each subframe in each cycle adopts identical scheduling relation or different scheduling relations; Wherein, N is a positive integer.
3. method according to claim 1 and 2 is characterized in that, described base station is adopted identical scheduling relation with user terminal UE according to the agreement agreement; Perhaps, the base station described scheduling relation that will adopt is notified to UE by the mode of system broadcasts or high-level signaling.
4. method according to claim 3 is characterized in that, identical scheduling relation is adopted at all UE in the sub-district in described base station, and will dispatch and concern by Cell Broadcast CB and send to all UE in the sub-district; Perhaps, different scheduling relations is adopted at each UE in described base station, and will send to each UE by the exclusive high-level signaling of each UE at the scheduling relation that each UE adopts.
5. method according to claim 1 and 2, it is characterized in that, this method also comprises: after UE listens to PDCCH, determine the member carrier that this PDCCH is dispatched according to the described scheduling relation that adopt the base station, and the member carrier transmitting data of determining according to the resource scheduling information of carrying among the PDCCH that listens to.
6. a base station is characterized in that, this base station comprises: scheduling concerns acquiring unit and PDCCH dispensing unit;
Described scheduling concerns acquiring unit, is used to obtain the scheduling relation of setting up in advance, and wherein, described scheduling relation makes and exists a PDCCH and this PDCCH institute scheduled resources at least not on same member carrier;
Described PDCCH dispensing unit is used for concerning the scheduling relation that acquiring unit obtains according to described scheduling, PDCCH of configuration on each subframe of each member carrier in the polymerization carrier wave.
7. base station according to claim 6, it is characterized in that described scheduling concerns that the scheduling relation that acquiring unit obtains is the cycle with N subframe, each subframe in each cycle adopts identical scheduling relation or different scheduling relations, wherein, N is a positive integer.
8. base station according to claim 6 is characterized in that, described scheduling concerns that acquiring unit obtains the scheduling relation of setting up in advance according to the agreement agreement, perhaps obtains the scheduling relation of setting up in advance according to the actual requirements.
9. according to claim 6 or 8 described base stations, it is characterized in that this base station also comprises: scheduling concerns notification unit, is used for described scheduling is concerned that the scheduling that acquiring unit obtains concerns that the mode by system broadcasts or high-level signaling is notified to UE.
10. a UE is characterized in that, this UE comprises: channel-monitoring unit, carrier wave determining unit and data transmission unit;
Described channel-monitoring unit is used to monitor PDCCH;
Described carrier wave determining unit is used for the scheduling relation that adopts according to the base station, determines the member carrier in the polymerization carrier wave that PDCCH dispatched that described channel-monitoring unit listens to;
Described data transmission unit is used for the resource scheduling information of carrying according to the PDCCH that described channel-monitoring unit listens to, the member carrier transmitting data of determining in described carrier wave determining unit;
Wherein, described scheduling relation makes and exists a PDCCH and this PDCCH institute scheduled resources at least not on same member carrier.
11. UE according to claim 10, it is characterized in that, this UE also comprises: scheduling concerns acquiring unit, be used for obtaining the scheduling relation that adopts the base station according to the agreement agreement, perhaps obtain the scheduling relation that adopts the base station system broadcasts that sends from the base station or the high-level signaling, and the scheduling that will obtain relation offers described carrier wave determining unit.
12. UE according to claim 11 is characterized in that, described scheduling concerns that the scheduling relation that acquiring unit obtains is the cycle with N subframe, and each subframe in each cycle adopts identical scheduling relation or different scheduling relations; Wherein, N is a positive integer;
Described data transmission unit is at the member carrier transmitting data of determining described in the described PDCCH place subframe that listens to.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325377A (en) * | 2011-05-24 | 2012-01-18 | 电信科学技术研究院 | Resource scheduling indication method and device |
| WO2012031495A1 (en) * | 2010-09-10 | 2012-03-15 | 中兴通讯股份有限公司 | Long term evolution (lte) downlink control channel resource allocation method and base station |
| CN106664689A (en) * | 2015-07-31 | 2017-05-10 | 华为技术有限公司 | Transmission method and device for physical downlink control channel |
| WO2019233205A1 (en) * | 2018-06-04 | 2019-12-12 | 电信科学技术研究院有限公司 | Method and apparatus for configuring transmission bandwidth, and device |
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2009
- 2009-02-05 CN CN 200910076890 patent/CN101801095B/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012031495A1 (en) * | 2010-09-10 | 2012-03-15 | 中兴通讯股份有限公司 | Long term evolution (lte) downlink control channel resource allocation method and base station |
| US9030958B2 (en) | 2010-09-10 | 2015-05-12 | Zte Corporation | LTE downlink control channel resource allocation method and base station |
| CN102325377A (en) * | 2011-05-24 | 2012-01-18 | 电信科学技术研究院 | Resource scheduling indication method and device |
| CN102325377B (en) * | 2011-05-24 | 2014-08-06 | 电信科学技术研究院 | Resource scheduling indication method and device |
| CN106664689A (en) * | 2015-07-31 | 2017-05-10 | 华为技术有限公司 | Transmission method and device for physical downlink control channel |
| CN106664689B (en) * | 2015-07-31 | 2020-01-10 | 华为技术有限公司 | Transmission method and device of physical downlink control channel |
| US10645683B2 (en) | 2015-07-31 | 2020-05-05 | Huawei Technologies Co., Ltd. | Physical downlink control channel transmission method and apparatus |
| US10912076B2 (en) | 2015-07-31 | 2021-02-02 | Huawei Technologies Co., Ltd. | Physical downlink control channel transmission method and apparatus |
| WO2019233205A1 (en) * | 2018-06-04 | 2019-12-12 | 电信科学技术研究院有限公司 | Method and apparatus for configuring transmission bandwidth, and device |
| US11575578B2 (en) | 2018-06-04 | 2023-02-07 | Datang Mobile Communications Equipment Co., Ltd. | Method and apparatus for configuring transmission bandwidth, and device |
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