CN102685897A - Sequence configuration method and device in carrier aggregation system - Google Patents
Sequence configuration method and device in carrier aggregation system Download PDFInfo
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- CN102685897A CN102685897A CN2011100607665A CN201110060766A CN102685897A CN 102685897 A CN102685897 A CN 102685897A CN 2011100607665 A CN2011100607665 A CN 2011100607665A CN 201110060766 A CN201110060766 A CN 201110060766A CN 102685897 A CN102685897 A CN 102685897A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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Abstract
The invention discloses a sequence configuration method and device in a carrier aggregation system, which are used for solving the problem that during the cross-carrier scheduling in the conventional multi-carrier system, as the sequence relationship between main and auxiliary carriers restricts the distribution of auxiliary wave resources, the complete auxiliary carrier resources at the same time slots cannot be distributed. According to the invention, different scheduling ways are adopted for different sequence configurations; and as the starting moments of radio frames of the main and auxiliary carriers remain the fixed time migration, the main carrier can completely schedule and use the carrier resources of the auxiliary carriers in the same time slots during the cross-carrier scheduling of the multi-carrier system.
Description
Technical field
The present invention relates to a kind of wireless communication system, relate in particular to the sequential collocation method and the device of carrier wave in a kind of carrier aggregation system
Background technology
For higher data rate is provided to the mobile subscriber; Advanced long-term evolution system (Long Term Evolution Advance; LTE-A) (Carrier aggregation CA), its objective is subscriber equipment (the User Equipment for having respective capabilities to have proposed carrier aggregation technology; UE) bigger broadband is provided, improves the peak rate of UE.Among the LTE, the maximum downstream transmission bandwidth of system's support is 20MHz, and carrier aggregation is that (component carriers, CC) polymerization gets up to support that maximum is no more than the downstream transmission bandwidth of 100MHz greater than 20MHz with two perhaps more component carriers.
The frequency range that component carrier can use LTE to define also can be used for the newly-increased specially frequency range of LTE-A.Nervous based on present frequency spectrum resource, can not always have component carrier continuous on the frequency domain can distribute to operator and use, so whether carrier aggregation is continuous on frequency domain by each component carrier, can divide continuous carrier aggregation and discrete carrier aggregation.Carrier aggregation by each component carrier whether in identical frequency band; The carrier aggregation and the carrier aggregation of striding frequency band (multiple frequency bands) that can be divided into single band (single band); So-called single carrier aggregation is meant all component carriers of participating in carrier aggregation all in same frequency band, and single carrier aggregation can be that continuous carrier aggregation also can be discontinuous carrier aggregation; The carrier aggregation that what is called is striden frequency band is meant that the component carrier of participating in carrier aggregation can be derived from different frequency bands.LTE-A subscriber equipment with carrier aggregation ability, transceive data on a plurality of component carriers simultaneously, and LTE UE can only be on the component carrier of a compatible LTE transceive data.
In carrier aggregation technology; UE can use more than one carrier resource, and the maximum that has increased UE is on the one hand used number of resources, thereby increases the maximum rate of UE; Also can in more resources, select better resource to supply UE to use on the other hand, thereby improve the frequency spectrum service efficiency of UE.Simultaneously in order to let UE support multi-carrier polymerizing; UE also will improve the reception/transmitter capabilities of self; And need simultaneously in more carrier wave and reception/emission data on the broadband more; The radio frequency of UE need be supported higher bandwidth, and baseband design need be supported the more data disposal ability and have more multicomponent device power consumption all to bring very big challenge to the terminal.
The ZAP of LTE R10 version has been formulated completion at present, and main mentality of designing is following:
A plurality of carrier waves are supported in a sub-district, and these carrier waves all are time synchronized, and the initial moment that is to say each radio frames all is consistent.
Each carrier wave all disposes synchronizing signal, system message, downlink reference signal, the terminal that each carrier wave can both backward compatibility LTE R8;
To particular UE, system can dispose one of them carrier wave as main carrier (PCell, primary cell) for UE, can also dispose 0 or a plurality of auxilliary carrier waves (SCell, Serving Cell) in addition; Notice that main carrier of saying and auxilliary carrier wave can be different to the main carrier/auxilliary carrier wave of different UEs configuration to the UE configuration here.
The main carrier that UE disposed, auxilliary carrier set can be adjusted;
The physical layer aspect, whether no matter have the user to use the descending carrier resource, the descending time slot of each carrier wave is all wanted transmitted reference signal, is used for user's measurement.
Carrier dispatching is striden in support, promptly uses the resource on other carrier waves through the descending control signaling dispatched users of certain carrier wave.
In the LTE system; Because each carrier wave sequential is fully synchronous; During the resource of other carrier waves of control domain in carrier wave scheduling, need to consider that the terminal receives the time delay that control domain information, decoding etc. are handled, therefore can only dispatch on other carrier waves resource with the subframe latter half.
Scheduling under the identical situation of major-minor carrier wave timing relationship is as shown in Figure 1; If the PDCCH through main carrier strides carrier dispatching; Can dispatch main carrier all service resources in should dispatching cycle; But be merely able to dispatch the part resource of auxilliary carrier wave, like Resource Block A in the auxilliary carrier wave 1 and the Resource Block B in the auxilliary carrier wave 2.
For the Resource Block C in the auxilliary carrier wave 1, owing to be close to PDCCH, if Resource Block C is used in scheduling on the PDCCH of main carrier; In general; The terminal need receive the PDCCH of main carrier and decode and just can know the Resource Block C that has been scheduled, and the terminal frequency that need be transformed into auxilliary carrier wave 1 place receives then, and these are handled all needs the time; Therefore when waiting the terminal to forward to assist carrier wave 1 to begin to receive; Part signal on the possible Resource Block C has missed, and can cause Data Receiving imperfect, finally causes terminal data to take defeat.Therefore Resource Block C can only be dispatched by the PDCCH of auxilliary carrier wave 1.
In addition, for special subframe design (certainly, this kind design is not applied to the LTE system), like auxilliary carrier wave 2, wherein do not dispose PDCCH, whole subframe all is a service resources, and dispatches through the PDCCH of other carrier waves.For the Resource Block D in the auxilliary carrier wave 2,, will certainly cause the waste of resource because the terminal processes restriction can not be dispatched to the PDCCH in other carrier waves of time slot.
Bring restriction for the processing under the big bandwidth resource allocation form under the mode of above-mentioned carrier wave sequential alignment; Very high like certain user's data speed; Need on a plurality of carrier waves, to send simultaneously; If adopt existing LTE system carrier sequential and scheduling mode, in the subframe at schedule information place, the part resource of auxilliary carrier wave can only be used in this terminal.
Summary of the invention
In view of this; Main purpose of the present invention is to provide sequential collocation method and the device in a kind of carrier aggregation system; Be used for solving when existing multicarrier system is striden carrier dispatching; Because major-minor carrier wave sequential relationship causes the restriction that auxilliary carrier resource is distributed, and can not distribute the complete auxilliary carrier resource with time slot.
For achieving the above object, technical scheme of the present invention is achieved in that
Sequential collocation method in a kind of carrier aggregation system, this method comprises:
Make the initial moment of radio frames of main carrier and auxilliary carrier wave keep the regular time skew;
Based on said time migration, through the same time slot on the auxilliary carrier wave of main carrier scheduling or the carrier resource of different time-gap.
Preferably, said time migration is described by symbolic number or absolute time value.
Further, said time migration adopt fixed configurations, or by the carrier Control signaling provide the auxilliary relative main carrier of carrier wave time migration, or measure a plurality of carrier waves and obtain said time migration by the terminal is autonomous.
Further, to main carrier of said terminal configuration and a plurality of auxilliary carrier wave, use the resource on other carrier waves through the scheduling of resource signaling indicating terminal on the main carrier.
Further, the resource of said auxilliary carrier wave is dispatched through the schedule information of main carrier, and the control channel of terminal monitoring main carrier obtains said schedule information.The schedule information of carrying on the said main carrier control channel is used for dispatch terminal and uses all or part of resource in one or more subframes of assisting carrier wave.
Further, said time migration is understood the main carrier control channel according to the terminal and is carried out carrier wave and change needed processing delay and confirm.
Based on the embodiment of the invention, the present invention also proposes the sequential inking device in a kind of carrier aggregation system, and this device comprises:
Configuration module is used for carrier wave is configured, and the initial moment of the radio frames of main carrier and auxilliary carrier wave is configured, and makes the initial moment of radio frames of main carrier and auxilliary carrier wave keep the regular time skew;
Scheduler module is used for based on said time migration, through the same time slot on the auxilliary carrier wave of main carrier scheduling or the carrier resource of different time-gap.
Said configuration module adopts the fixed configurations mode, and promptly the agreement stipulated form disposes said time migration; Or adopt mode by carrier Control signaling terminal, and the time migration of the auxilliary relative main carrier of carrier wave being disposed to terminal or employing dispose by network side, the terminal disposes said time migration through the mode of autonomous measurement carrier wave.
Further, under the situation of said configuration module to a main carrier of terminal configuration and a plurality of auxilliary carrier waves, said scheduler module is through using the resource on the auxilliary carrier wave at transmission schedule information indicating terminal on the control channel of main carrier; Said schedule information is used for dispatch terminal and uses all or part of resource in one or more subframes of assisting carrier wave.
The present invention is directed to different sequential configurations; Adopt different scheduling modes; Through the initial moment maintenance set time skew of the radio frames that makes main carrier and auxilliary carrier wave; Thereby realized when multicarrier system is striden carrier dispatching, can carry out complete scheduling and use with the carrier resource of time slot to auxilliary carrier wave in major-minor year.
Description of drawings
Fig. 1 is the sequential relationship sketch map under the identical situation of major-minor carrier wave timing relationship;
The major-minor carrier wave sequential relationship sketch map that Fig. 2 provides for the embodiment of the invention 1;
The major-minor carrier wave sequential relationship sketch map that Fig. 3 provides for the embodiment of the invention 2.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below lift embodiment and with reference to accompanying drawing, to further explain of the present invention.
Sequential collocation method sketch map in the carrier aggregation system that Fig. 2 provides for the embodiment of the invention 1, as shown in the figure, system is made up of 3 carrier waves, and one of them is a main carrier, two auxilliary carrier waves.Auxilliary carrier wave adopts the special frames structure, does not have control domain in the subframe, all is service resources.
Among this embodiment, system uses auxilliary carrier resource through the PDCCH channel dispatch user of main carrier.The sequential relationship of main carrier and auxilliary carrier wave keeps regular time skew (Timing offset); The initial moment of radio frames that is main carrier and auxilliary carrier wave is provided with certain skew; The size of this Timing offset can be disposed by operator, and informs the terminal through system information on the main carrier or dedicated signaling.
In the sequential allocation plan of the carrier aggregation system that this embodiment provides; System is that main carrier is safeguarded identical System Frame Number with auxilliary carrier wave; Only will assist the initial moment of carrier wave wireless frame and do the regular hour skew; The duration of described time migration depends on terminal deciphering main carrier PDCCH channel and carries out carrier wave and change needed processing delay; The length of this time migration greater than main carrier PDCCH is set usually, and said time migration can represent that information describes by symbolic number, absolute time value equal time;
In embodiments of the present invention; Said time migration can be adopted fixed configurations (promptly clearly being stipulated the regulation of all abiding by the agreement in network side and terminal by agreement), perhaps provided the time offset value of its relative other carrier waves, perhaps independently measured the concrete time migration of a plurality of carrier waves acquisitions by the terminal by the carrier Control signaling.
The sequential collocation method is described in the carrier aggregation system that this embodiment is provided below in conjunction with Fig. 2:
Step 301, carrier aggregation system are through the time migration between other auxilliary carrier wave of carrier Control signaling terminal and the main carrier;
Step 302, when begin a dispatching cycle; The PDCCH of terminal monitoring main carrier; Obtain among the PDCCH schedule information through parsing to this terminal; Said schedule information indicating terminal uses in the auxilliary carrier wave resource that has one or more subframes of certain hour difference with the main carrier control channel, also can be the part resource in the subframe;
The expression mode of auxilliary carrier resource is by auxilliary carrier identification, subframe numbers, symbol logo, PRB formations such as (Physical Resource Block, Physical Resource Block) in the said schedule information.
Schedule information as shown in Figure 2, as on the PDCCH of main carrier subframe 1, to carry can dispatched users be used all resources in the subframe 1 of subframe 1 and/or auxilliary carrier wave 2 of auxilliary carrier wave 1.Certainly, also can dispatched users use the auxilliary carrier wave subframe 2 or the resource of back more.The terminal is through understanding schedule information, knows that subsequently on whole resources of the subframe 2 of the subframe 1 of auxilliary carrier wave 1 and/or auxilliary carrier wave 2 all be the signal of issuing oneself.
Step 303, after knowing said schedule information; The frequency range of auxilliary carrier wave 1 and/or auxilliary carrier wave 2 is transferred to radio-frequency unit at the terminal by main carrier place frequency range; Squint according to the set time in the sequential relationship of major-minor carrier wave; Wait for the arrival of auxilliary carrier wave subframe 1, receive all signals in the subframe 1 of assisting carrier wave 1 and/or auxilliary carrier wave 2 then.
As for the action of frequency inverted, depend on the realization at terminal, if there are many cover receivers at the terminal, the terminal also possibly opened the reception to main carrier, auxilliary carrier wave 1 and/or auxilliary carrier wave 2 simultaneously.Certainly, this mode is relatively taken.
As shown in Figure 3, system is made up of 3 carrier waves, and one of them is a main carrier, two auxilliary carrier waves.Auxilliary carrier wave adopts the special frames structure, does not have control domain in the subframe, all is service resources.System uses auxilliary carrier resource through the PDCCH channel dispatch user of main carrier.
There is a regular time skew Timing offset in the sequential relationship of main carrier and auxilliary carrier wave, and the size of this Timing offset is 0 among this embodiment, and tells the terminal through system information on the main carrier or dedicated signaling.Because Timing offset is set to 0, so main carrier and auxilliary carrier wave be to keep synchronous, and simultaneity factor is that main carrier is safeguarded identical System Frame Number with auxilliary carrier wave.
A dispatching cycle, the PDCCH of terminal monitoring main carrier wherein carries user's schedule information.Said schedule information indicating terminal uses the resource of auxilliary carrier wave, and wherein the expression mode of auxilliary carrier resource is by auxilliary carrier identification, subframe numbers, symbol logo, PRB formations such as (Physical Resource Block, Physical Resource Block).The auxilliary carrier resource that said schedule information indicating terminal uses is positioned at main carrier PDCCH channel and exists on the resource of one or more subframes of certain hour difference.
Among this embodiment,, then must distribute this user to use the resource of next subframe if give unique user in the resource of auxilliary allocation of carriers one sub-frame.
Schedule information as shown in Figure 3, as on the PDCCH of main carrier subframe 2, to carry can dispatched users be used all resources in the auxilliary carrier wave subframe 3.Certainly, also can dispatched users use the auxilliary carrier wave subframe 4 or the resource of back more.
PDCCH is at first monitored in the subframe 2 of main carrier in the terminal, has carried the schedule information to oneself when detecting PDCCH, and this information is understood at the terminal, knows on whole resources of the subframe 3 of assisting carrier wave 1, all to be the signal of issuing oneself subsequently.
At this moment, the terminal is transferred to the frequency range of assisting carrier wave 1 with radio-frequency unit by main carrier place frequency range, according to the fixedly timing slip in the sequential relationship of major-minor carrier wave, waits for the arrival of auxilliary carrier wave subframe 3, then all signals in the subframe 3 of the auxilliary carrier wave 1 of reception.
As for the action of frequency inverted, depend on the realization at terminal, if there are many cover receivers at the terminal, the terminal also possibly opened the reception to main carrier and auxilliary carrier wave 1 simultaneously.Certainly, this mode is relatively taken.
Embodiment 3
Based on the foregoing description, the present invention proposes the embodiment of sequential inking device in a kind of carrier aggregation system, and this device comprises configuration module, scheduler module;
Configuration module is used for carrier wave is configured and the initial moment of the radio frames of main carrier and auxilliary carrier wave is configured, and makes the initial moment of radio frames of main carrier and auxilliary carrier wave keep the regular time skew;
Said configuration module adopts the fixed configurations mode, and promptly agreement is arranged the mode of said time migration, disposes said time migration, this mode lower network side and the terminal agreement of all must abiding by the agreement; Or adopt mode by carrier Control signaling terminal, the time migration of the auxilliary relative main carrier of carrier wave is disposed to the terminal; Or adopt by the network side configuration, the terminal obtains the configuration of said time migration through the mode of the auxilliary carrier wave of autonomous measurement.
Scheduler module is used for based on said time migration, through the same time slot on the auxilliary carrier wave of main carrier scheduling or the carrier resource of different time-gap.
Under the situation of said configuration module to a main carrier of terminal configuration and a plurality of auxilliary carrier waves, said scheduler module is through using the resource on the auxilliary carrier wave at transmission schedule information indicating terminal on the control channel of main carrier; Said schedule information is used for dispatch terminal and uses all or part of resource in one or more subframes of assisting carrier wave.
Because this device embodiment is based on said method embodiment, in this device comprise module and all establish for the steps flow chart of Method Of Accomplishment embodiment, its function all can directly derive from method embodiment, for saving space, detailed functional description is repeated no more here.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.
Claims (10)
1. the sequential collocation method in the carrier aggregation system is characterized in that this method comprises:
Make the initial moment of radio frames of main carrier and auxilliary carrier wave keep the regular time skew;
Based on said time migration, through the same time slot on the auxilliary carrier wave of main carrier scheduling or the carrier resource of different time-gap.
2. method according to claim 1 is characterized in that, said time migration is described by symbolic number or absolute time value.
3. method according to claim 1 is characterized in that, said time migration adopt fixed configurations, or by the carrier Control signaling provide the auxilliary relative main carrier of carrier wave time migration, or measure a plurality of carrier waves and obtain said time migration by the terminal is autonomous.
4. method according to claim 1 is characterized in that,
To main carrier of said terminal configuration and a plurality of auxilliary carrier wave, use the resource on other carrier waves through the scheduling of resource signaling indicating terminal on the main carrier.
5. according to claim 1 or 4 described methods, it is characterized in that,
The resource of said auxilliary carrier wave is dispatched through the schedule information of main carrier, and the control channel of terminal monitoring main carrier obtains said schedule information.
6. method according to claim 5 is characterized in that,
The schedule information of carrying on the said main carrier control channel is used for dispatch terminal and uses all or part of resource in one or more subframes of assisting carrier wave.
7. method according to claim 5 is characterized in that,
Said time migration is understood the main carrier control channel according to the terminal and is carried out carrier wave and change needed processing delay and confirm.
8. the sequential inking device in the carrier aggregation system is characterized in that this device comprises:
Configuration module is used for carrier wave is configured, and the initial moment of the radio frames of main carrier and auxilliary carrier wave is configured, and makes the initial moment of radio frames of main carrier and auxilliary carrier wave keep the regular time skew;
Scheduler module is used for based on said time migration, through the same time slot on the auxilliary carrier wave of main carrier scheduling or the carrier resource of different time-gap.
9. device according to claim 8 is characterized in that,
Said configuration module adopts the fixed configurations mode, and promptly the agreement stipulated form disposes said time migration; Or adopt mode by carrier Control signaling terminal, and the time migration of the auxilliary relative main carrier of carrier wave being disposed to terminal or employing dispose by network side, the terminal disposes said time migration through the mode of autonomous measurement carrier wave.
10. device according to claim 8 is characterized in that,
Under the situation of said configuration module to a main carrier of terminal configuration and a plurality of auxilliary carrier waves, said scheduler module is through using the resource on the auxilliary carrier wave at transmission schedule information indicating terminal on the control channel of main carrier; Said schedule information is used for dispatch terminal and uses all or part of resource in one or more subframes of assisting carrier wave.
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| CN201110060766.5A CN102685897B (en) | 2011-03-09 | 2011-03-09 | Sequence configuration method and device in a kind of carrier aggregation system |
| PCT/CN2012/072148 WO2012119567A1 (en) | 2011-03-09 | 2012-03-09 | Method and apparatus for timing configuration in carrier aggregation system |
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| CN201110060766.5A CN102685897B (en) | 2011-03-09 | 2011-03-09 | Sequence configuration method and device in a kind of carrier aggregation system |
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| CN107800522B (en) * | 2016-09-05 | 2020-11-06 | 上海朗帛通信技术有限公司 | Method and device in wireless communication |
| CN111316718A (en) * | 2017-11-09 | 2020-06-19 | 上海诺基亚贝尔股份有限公司 | Carrier aggregation for sidelink communications |
| CN110859001A (en) * | 2018-08-22 | 2020-03-03 | 中国移动通信集团山东有限公司 | Carrier aggregation scheduling method and system |
| CN110859001B (en) * | 2018-08-22 | 2022-12-09 | 中国移动通信集团山东有限公司 | Carrier aggregation scheduling method and system |
| WO2021092920A1 (en) * | 2019-11-15 | 2021-05-20 | Oppo广东移动通信有限公司 | Cross-carrier transmission method and apparatus, and terminal device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012119567A1 (en) | 2012-09-13 |
| CN102685897B (en) | 2017-09-26 |
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