CN101790241B - Control information sending and receiving method of distributed relay station and transceiving system - Google Patents
Control information sending and receiving method of distributed relay station and transceiving system Download PDFInfo
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- CN101790241B CN101790241B CN200910003973.XA CN200910003973A CN101790241B CN 101790241 B CN101790241 B CN 101790241B CN 200910003973 A CN200910003973 A CN 200910003973A CN 101790241 B CN101790241 B CN 101790241B
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Abstract
The invention provides a control information sending and receiving method of a distributed relay station and a transceiving system. In the sending method, a base station (BS) assigns relay station (RS) control information to the RS, wherein the RS control information carries uplink and downlink dispatching authorization information configured by the BS to the RS and RS available resource information; and in the receiving method, after the RS receives the RS control information assigned by the BS, the RS blindly detects out the uplink and downlink dispatching authorization information configured by the BS to the RS and the RS available resource information, and configures and assigns user control information for users covered by the RS according to the RS available resource information. The technical scheme of the invention solves the problem of the failure sending of the distributed RS control information in the prior art and not only ensures the RS can receive the control information assigned by the BS but also guarantees the backward compatibility, and moreover, the times of the RS blind detection is fewer, thereby saving power loss.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to distributed RS (Relay Station: relay station) control information sending, receiving method and receive-transmit system in OFDM (Orthogonal FrequencyDivision Multiplexing, orthogonal frequency division multiplexi) system.
Background technology
At present, the cordless communication network target of a new generation collects the connecting systems such as honeycomb, fixed wireless access, nomadic, radio area network, and in conjunction with complete IP network, being respectively user under high speed and low speed mobile environment provides peak rate to reach the wireless transmission capability of 100Mbps and 1Gbps.In order to reach this target, cordless communication network needs on wider high band spectral range for user provides service.Due to electromagnetic nature of radio propagation, the wireless communication system being operated in high frequency can obtain higher capacity on the one hand, also can be limited to limited coverage but then.
Due to the impact of the factors such as shadow fading and barrier block, base station (Base Station, referred to as BS) cannot cover each corner completely, makes the network coverage occur blind spot.Apply relaying (Relay) technology in this case and can supplement the blind spot area covering BS signal and can not arrive, improve the network coverage.On the other hand, at hot zones because user density is higher or the more high factor of customer service demand data rate, BS load is heavier, therefore, utilizes Relay also can reach and shares offered load, improves the effect of network capacity and resource utilization.Improving the advantage in MPS process, raising network capacity and resource utilization etc. based on Relay technology, Relay technology is regarded as a key technology of forth generation network (4th Generation, referred to as 4G).
In the network introducing RS, source scheduling mode is divided into two kinds: one is distributed scheduling, another kind is centralized scheduling, wherein, distributed scheduling is applicable to the RS with independent scheduling resource ability, part resource is allocated to RS by BS, and RS independently can dispatch this part resource for providing service for being in user in RS coverage; Under centralized scheduling mode, by the unified distribution carrying out resource of BS, RS itself does not have the authority of Resources allocation, and relay services is carried out in the scheduling be merely able to according to BS.
LTE (Long Term Evolution, Long Term Evolution) system, LTE-A (Long TermEvolution-Advanced) system, IMT-Advanced (International MobileTelecommunication-Advanced) system is all based on OFDM (Orthogonal FrequencyDivision Multiplexing) technology, the data mode of time-frequency bidimensional in an ofdm system, in order to UE (User equipment, subscriber equipment) hold power saving, control channel adopts TDM (TimeDivision Multiplex usually, time division multiplexing) mode, that is control channel and Traffic Channel are separated in time, such as in a subframe, there are 14 OFDM symbol, front 3 OFDM symbol are as control channel, rear 11 OFDM symbol are as Traffic Channel.
First be described for the control channel of current LTE system.Such as in LTE system, descending control signaling mainly comprises following content:
1) CCFI (control channel format indicator): control channel form indicates;
2) DL grant (downlink grant): descending scheduling mandate;
3) UL grant (uplink grant): uplink scheduling authorization;
4) HI (HARQ indicator): HARQ (Hybrid Automatic Repeat request, mixed automatic retransfer) instruction;
Can find out that the design of control channel is made up of different parts, each part has its specific function.For convenience of description, define several term and agreement below,
1) be called CCE (Control channels elements, control channel unit) at the continuous L of a frequency domain subcarrier, CCE can comprise DL grant and UL grant;
2) indicate several OFDM symbol for control channel and CCFI, independent with CCE; HI is also independent with CCE;
3) all CCE are QPSK (Quadrature Phase Shift Keying, Quadrature Phase Shift Keying) modulation;
4) each control channel is combined by a CCE or multiple CCE to form;
5) each UE can monitor a series of candidate control channel;
6) number of candidate control channel is the maximum times of blind Detecting;
7) number of candidate control channel is greater than the number of CCE;
8) transmitting-receiving two-end provides several combination, such as, only have 1,2,4,8 CCE to combine as candidate control channel;
9) 1,2,4,8 combinations corresponding different coding speed respectively;
In Node-B (Node B, i.e. base station) end, the control information of each UE is carried out chnnel coding respectively, then QPSK modulation is carried out, carry out the mapping of CCE to RE, carry out going out after IFFT conversion is launched, suppose that now control channel is made up of 32 CCE, after receiving terminal carries out FFT conversion, UE carries out blind Detecting (namely respectively to CCE0 from being combined as 1 CCE, CCE1, ..., CCE31 carries out blind Detecting), if UE_ID does not monitor successfully, then carry out blind Detecting (namely respectively to [CCE0 CCE1] from being combined as 2 CCE, [CCE2 CCE3], ..., [CCE30 CCE31]), the like.If all do not listen to the UE_ID matched with oneself in whole blind detection process, illustrate and now do not have one's own control signal to assign, then UE is switched to sleep pattern; If listen to the UE_ID matched with oneself, afterwards according to the business information that control signal demodulation is corresponding.
At present, research for BS and RS Resourse Distribute, cooperation is a focus, but it is less to send research for the control information introducing distributed RS in network, distributed RS can produce control signal, the control signal of its UEs covered comes from RS to be handed down to its UEs covered, so how, not only ensured that RS can receive control information that BS issues but also ensure backwards compatibility, and this this invention problem that will solve just.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of distributed RS control information sending, receiving method and receive-transmit system, overcomes the problem that in prior art, distributed RS control information can not send.
In order to solve the problem, the invention provides a kind of sending method of distributed relay station control information, comprise: base station BS issues RS control information to relay station RS, in described RS control information, carry up-downgoing scheduling authorization information and described RS available resources information that BS is described RS configuration.
Further, described BS is that the up-downgoing scheduling authorization information of RS configuration is called the control information of the RS first order, and the available resources information of distributing for RS is called the control information of the RS second level;
Described BS is that RS configures RS first order control information and the control information of the RS second level, and determining the initial index of the control channel unit CCE carrying the control information of the RS first order, BS issues after mapping RS first order control information and the control information of the RS second level by a bearing mode afterwards.
Further, described bearing mode is with any one under type:
(a1) CCE carrying the control information of the described RS first order and the control information of the RS second level has the relative position determined;
(b1) control information of the described RS first order and the control information of the RS second level have incomplete same signaling structure;
(c1) control information of the described RS first order and the control information of the RS second level have incomplete same signaling structure, and the CCE carrying the control information of the described RS first order and the control information of the RS second level has the relative position determined;
Described bearing mode is arranged by BS and RS or is determined rear notice RS by BS.
Further, when described bearing mode is (a1) or (c1), the control information of the RS first order is mapped on one or more CCE of starting with the initial index of the CCE of described carrying RS first order control information by BS, and maps the control information of the RS second level from a relative position;
When described bearing mode is (b1), the control information of the RS first order is mapped on one or more CCE of starting with the initial index of the CCE of described carrying RS first order control information by BS, and in all remaining CCE, select arbitrary CCE to start to map the control information of the RS second level as the initial index of RS second level control information.
Further, the CCE of described carrying RS first order control information and the control information of the RS second level has the relative position determined and refers to, interval between the initial CCE of carrying RS first order control information and the initial CCE of carrying RS second level control information is determined, and the sequencing of the control information of the RS first order and the control information of the RS second level is determined.
Further, described BS encodes to the control information of the RS second level before issuing described control information, adopts the mode of absolute coding or combined coding or hybrid coding;
Described absolute coding refers to, each RS second level control information is carried out encoding by BS respectively, cyclic check, RS_ID that each RS of carrying is corresponding;
Combined coding refers to, all RS second level control informations are carried out encoding by BS together, cyclic check, and BS is that these RS distribute public RS_ID, and the control information after coding carries public RS_ID;
Hybrid coding refers to, the control information of the RS second level is divided into several part by BS, one or more RS second level control information forms a part, each part is carried out together encode, cyclic check, and partly distribute public RS_ID for every, each several part control information carries public RS_ID, is independently between each several part control information.
The present invention also provides a kind of method of reseptance of distributed relay station control information, comprise: after relay station RS receives the RS control information that base station BS issues, the up-downgoing scheduling authorization information and described RS available resources information that BS is described RS configuration is measured in blind check, and is its user's configure user control information covered according to described RS available resources information and issues.
Further, described BS is that the up-downgoing scheduling authorization information of RS configuration is called the control information of the RS first order, and the available resources information of distributing for RS is called the control information of the RS second level;
After described RS receives the control information that BS issues, any one in the following manner detects the control information of the RS first order and the control information of the RS second level:
(a2) when the CCE being carrying described RS first order control information and the control information of the RS second level when bearing mode has the relative position determined, RS first carries out blind Detecting from the initial index of the CCE of described carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, again blind Detecting is carried out from the CCE of described relative position, until detect another control information consistent with the RS_ID of this RS, and determine the control information of the RS first order and the control information of the RS second level by the relative position of the CCE of the control information of the RS first order and the control information of the RS second level,
(b2) when bearing mode is the control information of the RS first order and the control information of the RS second level has incomplete same signaling structure, RS first carries out blind Detecting from the initial index of the CCE of described carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, the control information type detected is determined according to signaling structure, afterwards blind Detecting is carried out to the CCE be not detected, until detect another control information consistent with the RS_ID of this RS;
(c2) when bearing mode is that the control information of the RS first order and the control information of the RS second level have incomplete same signaling structure, and the CCE carrying the control information of the described RS first order and the control information of the RS second level is when having the relative position determined, RS first carries out blind Detecting from the initial index of the CCE of described carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, the control information type detected is determined according to signaling structure, afterwards from described relative position again carry out blind Detecting, until detect another control information consistent with the RS_ID of this RS.
Further, described RS demodulates up-downgoing scheduling authorization information and the available resources information of this RS according to the RS first order control information detected and the control information of the RS second level, and be the user resource allocation that it covers according to described available resources information, formulate subscriber control information and be handed down to user, the UE_ID that described subscriber control information carrying is corresponding, after user receives the subscriber control information that described RS issues, blind check carries out demodulation after measuring the control information consistent with its UE_ID.
The present invention also provides a kind of distributed relay station control information receive-transmit system, and this system comprises the relay station RS under base station BS and base station coverage, it is characterized in that:
Described BS comprises generation module and sending module;
Described generation module, for generating relay station control information, described RS control information comprises the up-downgoing scheduling authorization information and described RS available resources information that BS is described RS configuration;
Described sending module, for sending described RS control information to RS;
Described RS comprises receiver module and blind Detecting module;
Described receiver module, for receiving the described RS control information that base station issues;
Described blind Detecting module, measures for blind check the up-downgoing scheduling authorization information and described RS available resources information that described BS is RS configuration.
Further, described BS is that the up-downgoing scheduling authorization information of RS configuration is called the control information of the RS first order, and the available resources information of distributing for RS is called the control information of the RS second level;
Described BS also comprises processing module, for determining the initial index of the control channel unit CCE carrying the control information of the RS first order, and the control information of the RS first order and the control information of the RS second level is mapped on the CCE of relevant position by a bearing mode.
Further, described bearing mode is with any one under type:
(a1) CCE carrying the control information of the described RS first order and the control information of the RS second level has the relative position determined;
(b1) control information of the described RS first order and the control information of the RS second level have incomplete same signaling structure;
(c1) control information of the described RS first order and the control information of the RS second level have incomplete same signaling structure, and the CCE carrying the control information of the described RS first order and the control information of the RS second level has the relative position determined;
Described bearing mode is arranged by BS and RS or is determined rear notice RS by BS.
Further, when bearing mode is (a1) or (c1), the control information of the RS first order is mapped on one or more CCE of starting with the initial index of the CCE of described carrying RS first order control information by described processing module, and maps the control information of the RS second level from a relative position;
When bearing mode is (b1), the control information of the RS first order is mapped on one or more CCE of starting with the initial index of the CCE of described carrying RS first order control information by described processing module, and in all remaining CCE, select arbitrary CCE to start to map the control information of the RS second level as the initial index of RS second level control information;
When bearing mode is (a1), described blind Detecting module first carries out blind Detecting from the initial index of the CCE of described carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, again blind Detecting is carried out from the CCE of described relative position, until detect another control information consistent with the RS_ID of this RS, and determine the control information of the RS first order and the control information of the RS second level by the relative position of the CCE of the control information of the RS first order and the control information of the RS second level;
When bearing mode is (b1), described blind Detecting module first carries out blind Detecting from the initial index of the CCE of described carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, the control information type detected is determined according to signaling structure, afterwards blind Detecting is carried out to the CCE be not detected, until detect another control information consistent with the RS_ID of this RS;
When bearing mode is (c1), described blind Detecting module first carries out blind Detecting from the initial index of the CCE of described carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, the control information type detected is determined according to signaling structure, afterwards from described relative position again carry out blind Detecting, until detect another control information consistent with the RS_ID of this RS.
In sum, the invention provides a kind of distributed RS control information sending, receiving method and receive-transmit system, solve the problem that the distributed RS control information of prior art cannot send, not only ensured that RS can receive control information that BS issues but also ensure backwards compatibility, and RS blind Detecting number of times is few, save power loss.
Accompanying drawing explanation
Fig. 1 is control information classification schematic diagram of the present invention;
Fig. 2 is the present embodiment system configuration schematic diagram;
Fig. 3 is the present embodiment RS control information sending method flow chart;
Fig. 4 is the present embodiment RS control information method of reseptance flow chart.
Embodiment
Technical scheme of the present invention is further illustrated below in conjunction with accompanying drawing and specific embodiment.
Technical problem to be solved by this invention is, a kind of distributed RS control information sending, receiving method and receive-transmit system are provided, BS carries the up-downgoing scheduling authorization information and RS available resources information that BS is RS configuration when RS issues control information, and the user covered for it after RS receives control information formulates control information and issues.The method had not only ensured that RS can receive control information that BS issues but also ensure backwards compatibility, and RS blind Detecting number of times is few, saves power loss.
The present embodiment provides a kind of receive-transmit system of RS control information, and as shown in Figure 2, this system comprises the RS under BS and BS covering, wherein,
BS comprises generation module, processing module and sending module;
Generation module, for generating RS control information, comprises up-downgoing scheduling authorization information and RS available resources information that BS is RS configuration; BS is that the up-downgoing scheduling authorization information of RS configuration is called the control information of the RS first order, and the available resources information of distributing for RS is called the control information of the RS second level;
Processing module, for carrying out chnnel coding, modulation, multiple antennas process and mapping to the control information after bearing identification;
Processing module to the encoding operation of RS first order control information with the coded system of BS to UE; Absolute coding, combined coding or hybrid coding mode can be adopted to the control information of the RS second level;
Processing module can adopt QPSK to modulate;
First determine the initial index of the CCE carrying the control information of the RS first order according to the ID of RS before processing module maps RS control information; By a bearing mode, the control information of the RS first order and the control information of the RS second level are mapped on the CCE of relevant position afterwards;
This bearing mode is with any one under type, can be arranged by BS and RS or determine rear notice RS by BS:
(a1) CCE carrying RS first order control information and the control information of the RS second level has the relative position determined;
(b1) control information of the RS first order and the control information of the RS second level have incomplete same signaling structure;
(c1) control information of the RS first order and the control information of the RS second level have incomplete same signaling structure, and the CCE of carrying RS first order control information and the control information of the RS second level has the relative position determined;
When bearing mode is (a1) or (c1), on one or more CCE that the initial index that the control information of the RS first order is mapped in the CCE carrying the control information of the RS first order by processing module starts, and map the control information of the RS second level from a relative position;
When bearing mode is (b1), on one or more CCE that the initial index that the control information of the RS first order is mapped in the CCE carrying the control information of the RS first order by processing module starts, and in all remaining CCE, arbitrary CCE is selected to start to map the control information of the RS second level as the initial index of RS second level control information.
Sending module, for sending RS control information to RS.
RS comprises receiver module, blind Detecting module, processing module and sending module, wherein,
The RS control information that receiver module issues for receiving BS;
Blind Detecting module, measures for blind check the up-downgoing scheduling authorization information and RS available resources information that BS is RS configuration.
When bearing mode is (a1), blind Detecting module first carries out blind Detecting from the initial index of the CCE of carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, again blind Detecting is carried out from the CCE of relative position, until detect another control information consistent with the RS_ID of this RS, and determine the control information of the RS first order and the control information of the RS second level by the relative position of the CCE of the control information of the RS first order and the control information of the RS second level;
When bearing mode is (b1), blind Detecting module first carries out blind Detecting from the initial index of the CCE of carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, the control information type detected is determined according to signaling structure, afterwards blind Detecting is carried out to the CCE be not detected, until detect another control information consistent with the RS_ID of this RS;
When bearing mode is (c1), blind Detecting module first carries out blind Detecting from the initial index of the CCE of carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, the control information type detected is determined according to signaling structure, afterwards from relative position again carry out blind Detecting, until detect another control information consistent with the RS_ID of this RS.
The CCE of carrying RS first order control information and the control information of the RS second level has the relative position determined and refers to, interval between the initial CCE of carrying RS first order control information and the initial CCE of carrying RS second level control information is determined, and the sequencing of the control information of the RS first order and the control information of the RS second level is determined.
Processing module, for carrying out demodulation to the RS first order control information detected and the control information of the RS second level, demodulates the resource of RS up-downgoing scheduling authorization control information and this RS permission use; And be the UE Resources allocation under this RS covering, and formulate subscriber control information, the UE_ID that subscriber control information carrying is corresponding;
Sending module, for issuing subscriber control information to UE on the CCE of correspondence.
The present embodiment provides a kind of sending method of distributed RS control information, as shown in Figure 3, comprises the following steps:
Step 301:BS is that RS configures RS control information, comprises RS up-downgoing scheduling authorization information and RS available resources information;
As shown in Figure 1, BS is that the up-downgoing scheduling authorization information of RS configuration is called the control information of the RS first order, for the available resources information of RS configuration is called the control information of the RS second level; The control information of RS to UE link is sent as the control information of UE level, the control information of BS to UE link be sent as the control information of UE level.
Step 302:BS processes RS control information, comprises coding, modulation, multiple antennas process and mapping;
Modulation system can be, but not limited to adopt QPSK modulation;
BS to the encoding operation of RS first order control information with the coded system of BS to UE;
BS can adopt absolute coding, combined coding or hybrid coding mode to the control information of the RS second level;
Absolute coding refers to, each RS second level control information is carried out encoding by BS respectively, CRC check (cyclic check), carry RS_ID corresponding to each RS;
Combined coding refers to, all RS second level control informations are carried out encoding by BS together, CRC check (cyclic check), and BS is that these RS distribute public RS_ID, and the control information after coding carries public RS_ID;
Hybrid coding refers to, the control information of the RS second level is divided into several part by BS, one or more RS second level control information forms a part, each part is carried out together encode, CRC check, and partly distribute public RS_ID for every, each several part control information carries public RS_ID, is independently between each several part control information.
During mapping, BS first calculates the initial index (namely carrying the scope of the initial CCE of RS first order control information) of the CCE of this RS first order control information of carrying by the ID of RS, afterwards, BS adopts any one bearing mode following to map RS first order control information and the control information of the RS second level, and this bearing mode is arranged by BS and RS or determined rear notice RS by BS:
(a1) CCE carrying RS first order control information and the control information of the RS second level has the relative position determined;
(b1) control information of the RS first order and the control information of the RS second level have incomplete same signaling structure;
(c1) control information of the RS first order and the control information of the RS second level have incomplete same signaling structure, and the CCE of carrying RS first order control information and the control information of the RS second level has the relative position determined.
When bearing mode is (a1) or (c1), on one or more CCE that the initial index that the control information of the RS first order is mapped in the CCE carrying the control information of the RS first order by BS starts, and map the control information of the RS second level from a relative position;
If the control information of the RS first order is front, the control information of the RS second level is rear, and the two initial CCE be spaced apart k, after the initial CCE of carrying RS first order control information determines ,+1 CCE of the kth after this CCE is the initial CCE of carrying RS second level control information;
When bearing mode is (b1), on one or more CCE that the initial index that the control information of the RS first order is mapped in the CCE carrying the control information of the RS first order by BS starts, and in all remaining CCE, arbitrary CCE is selected to start to map the control information of the RS second level as the initial index of RS second level control information.
The CCE of carrying RS first order control information and the control information of the RS second level has the relative position determined and refers to, interval between the initial CCE of carrying RS first order control information and the initial CCE of carrying RS second level control information is determined, and the sequencing of the control information of the RS first order and the control information of the RS second level is determined.
Step 303:BS issues the RS control information of configuration to RS;
BS can adopt one or more CCE composition control channel bearing RS first order control information and the control information of the RS second level; As adopted 1,2,4,8 CCE composition control channel, also can adopt the CCE composition control channel of other value, the present invention is not restricted this.
The present embodiment provides a kind of method of reseptance of distributed RS control information, as shown in Figure 4, comprises the following steps:
Step 401:RS receives the RS control information that BS issues, comprise BS be RS configuration up-downgoing scheduling authorization information, i.e. RS first order control information, and for RS configure available resources information, i.e. RS second level control information;
Step 402:RS carries out blind Detecting to the RS control information received, and measures the control information of the RS first order and the control information of the RS second level according to a bearing mode blind check;
When bearing mode is (a1), RS first carries out blind Detecting from the initial index of the CCE of carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, again blind Detecting is carried out from the CCE of relative position, until detect another control information consistent with the RS_ID of this RS, and determine the control information of the RS first order and the control information of the RS second level by the relative position of the CCE of the control information of the RS first order and the control information of the RS second level;
If the control information of the RS first order is front, the control information of the RS second level is rear, and the two initial CCE be spaced apart k, then RS before carrying the initial CCE of control information detected kth+1 or afterwards kth+1 CCE start blind Detecting, until detect another control information consistent with its RS_ID, then the particular type of two control informations detected is determined according to the RS first order control information determined and RS second level control information sequencing, namely which is the control information of the RS first order, and which is the control information of the RS second level;
When bearing mode is (b1), RS first carries out blind Detecting from the initial index of the CCE of carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, the control information type detected is determined according to signaling structure, afterwards blind Detecting is carried out to the CCE be not detected, until detect another control information consistent with the RS_ID of this RS, if the control information of the RS first order, then RS carries out blind Detecting again in all CCE be not detected, until detect another control information consistent with its RS_ID, now detection ordering can not be restricted, if the control information of the RS second level, the scope then again detecting the control information of the RS first order is the CCE of remaining carrying RS first order control information,
When bearing mode is (c1), RS first carries out blind Detecting from the initial index of the CCE of carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, the control information type detected is determined according to signaling structure, afterwards from relative position again carry out blind Detecting, until detect another control information consistent with the RS_ID of this RS.
If the control information of the RS first order is front, the control information of the RS second level is rear, and the two initial CCE be spaced apart k, when the control information detected is the control information of the RS first order, then can determine that the initial CCE of detection RS second level control information is kth+1 CCE after the initial CCE of the control information that carrying has detected, when the control information detected is the control information of the RS second level, then can determine that the initial CCE of detection RS first order control information is kth+1 CCE before the initial CCE of the control information that carrying has detected.
Step 403:RS carries out demodulation to the RS first order control information detected and the control information of the RS second level, demodulate the resource of RS up-downgoing scheduling authorization control information and this RS permission use, be the UE Resources allocation under this RS covering afterwards, and formulate subscriber control information, the UE_ID that the carrying of this subscriber control information is corresponding, is then handed down to UE on the CCE of correspondence;
UE under step 404:RS covers receives the subscriber control information that RS issues, and the subscriber control information consistent with its UE_ID is measured in blind check, and carries out demodulation to subscriber control information, the same prior art of blind checking method.
The inventive method is further illustrated below by application example;
Problem for convenience of description, has 48 CCE, BS here and comprise 1 UE, 1 RS, and RS covers 2 UE, is expressed as BS_UE, RS_UE1, RS_UE2 in supposing the system; Suppose in some subframes, these 3 UE have data to need to send, then the sending method of the control information of its correspondence is as follows:
The bearing mode that application example one: BS adopts is that the CCE of carrying RS first order control information and the control information of the RS second level has the relative position determined, and this relative position is, the initial CCE of carrying RS first order control information and 5, the initial CCE interval CCE of carrying RS second level control information, and the control information of the RS first order is before the control information of the RS second level; And BS calculates the CCE of carrying RS first order control information initial index according to the RS_ID of this RS is that the 18th CCE is to the 21st CCE;
The control information of BS_UE is mapped on the 1st CCE by BS, the control information of the RS first order is mapped from the 20th CCE, and with the control information of two CCE composition control channel bearing RS first order, then the control information of the RS second level is mapped from the 26th CCE;
After RS receives the control information issued, the initial index calculating the CCE of carrying RS first order control information according to its RS_ID is that the 18th CCE is to the 21st CCE, then from the 18th CCE, carry out blind Detecting, when detect the 20th consistent with its RS_ID with the control information of the 21st CCE carrying after, another control information consistent with its RS_ID should be detected from the 14th CCE or from the 26th CCE according to the relative position determined is known, when detecting that another control information carries from the 26th CCE, what determine that the 20th and the 21st CCE carry according to the sequencing of the control information of the RS first order and the control information of the RS second level further is the control information of the RS first order, the control information of the RS second level is carried as from the 26th CCE.
RS obtains its available resources information according to the control information of the RS second level, by the data-mapping of RS_UE1, RS_UE2 in available resource, corresponding control information carries corresponding RS_UE1_ID, RS_UE2_ID respectively and sends, after RS_UE1 utilizes RS_UE1_ID blind check to measure the control information of UE level, carry out the demodulation of control information, RS_UE2 carries out the demodulation of control information after utilizing RS_UE2_ID blind check to measure the control information of UE level.
The bearing mode that application example two: BS adopts is that the control information of the RS first order and the control information of the RS second level have incomplete same signaling structure; And BS calculates the CCE of carrying RS first order control information initial index according to the RS_ID of this RS is that the 22nd CCE is to the 25th CCE;
After RS receives the control information issued, the initial index calculating the CCE of carrying RS first order control information according to the RS_ID of this RS is that the 22nd CCE is to the 25th CCE, then RS carries out blind Detecting from the 22nd CCE, after detecting that the control information of 25 CCE carryings is consistent with its RS_ID, judge that this control information is the control information of the RS first order according to the signaling structure determined, then again blind Detecting is carried out to all CCE be not detected, until detect the control information of the RS second level.
RS obtains its available resources information according to the control information of the RS second level, by the data-mapping of RS_UE1, RS_UE2 in available resource, corresponding control information carries corresponding RS_UE1_ID, RS_UE2_ID respectively and sends, after RS_UE1 utilizes RS_UE1_ID blind check to measure the control information of UE level, carry out the demodulation of control information, RS_UE2 carries out the demodulation of control information after utilizing RS_UE2_ID blind check to measure the control information of UE level.
To sum up, adopt the method for the invention, this method solve the problem that distributed RS control information sends, not only ensured that RS can receive control information that BS issues but also ensure backwards compatibility, and RS blind Detecting number of times is few, saves power loss.
Claims (11)
1. a sending method for distributed relay station control information, comprising: base station BS issues RS control information to relay station RS, carries up-downgoing scheduling authorization information and described RS available resources information that BS is described RS configuration in described RS control information;
Described BS is that the up-downgoing scheduling authorization information of RS configuration is called the control information of the RS first order, and the available resources information of distributing for RS is called the control information of the RS second level;
Described BS is that RS configures RS first order control information and the control information of the RS second level, and determining the initial index of the control channel unit CCE carrying the control information of the RS first order, BS issues after mapping RS first order control information and the control information of the RS second level by a bearing mode afterwards;
Described bearing mode comprises:
(a1) CCE carrying the control information of the described RS first order and the control information of the RS second level has the relative position determined.
2. the method for claim 1, is characterized in that:
Described bearing mode is
(c1) control information of the described RS first order and the control information of the RS second level have incomplete same signaling structure, and the CCE carrying the control information of the described RS first order and the control information of the RS second level has the relative position determined;
Described bearing mode is arranged by BS and RS or is determined rear notice RS by BS.
3. method as claimed in claim 1 or 2, is characterized in that:
The control information of the RS first order is mapped on one or more CCE of starting with the initial index of the CCE of described carrying RS first order control information by BS, and maps the control information of the RS second level from a relative position.
4. method as claimed in claim 2, is characterized in that:
The CCE of described carrying RS first order control information and the control information of the RS second level has the relative position determined and refers to, interval between the initial CCE of carrying RS first order control information and the initial CCE of carrying RS second level control information is determined, and the sequencing of the control information of the RS first order and the control information of the RS second level is determined.
5. the method for claim 1, is characterized in that:
Described BS encodes to the control information of the RS second level before issuing described control information, adopts the mode of absolute coding or combined coding or hybrid coding;
Described absolute coding refers to, each RS second level control information is carried out encoding by BS respectively, cyclic check, RS_ID that each RS of carrying is corresponding;
Combined coding refers to, all RS second level control informations are carried out encoding by BS together, cyclic check, and BS is that these RS distribute public RS_ID, and the control information after coding carries public RS_ID;
Hybrid coding refers to, the control information of the RS second level is divided into several part by BS, one or more RS second level control information forms a part, each part is carried out together encode, cyclic check, and partly distribute public RS_ID for every, each several part control information carries public RS_ID, is independently between each several part control information.
6. a method of reseptance for distributed relay station control information, comprising:
After relay station RS receives the RS control information that base station BS issues, the up-downgoing scheduling authorization information and described RS available resources information that BS is described RS configuration is measured in blind check, and is its user's configure user control information covered according to described RS available resources information and issues;
Described BS is that the up-downgoing scheduling authorization information of RS configuration is called the control information of the RS first order, and the available resources information of distributing for RS is called the control information of the RS second level;
Described RS detects the control information of the RS first order and the control information of the RS second level after receiving the control information that BS issues in the following manner:
When the CCE that bearing mode is carrying described RS first order control information and the control information of the RS second level has the relative position determined, RS first carries out blind Detecting from the initial index of the CCE of described carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, again blind Detecting is carried out from the CCE of described relative position, until detect another control information consistent with the RS_ID of this RS, and determine the control information of the RS first order and the control information of the RS second level by the relative position of the CCE of the control information of the RS first order and the control information of the RS second level.
7. method as claimed in claim 6, is characterized in that:
After described RS receives the control information that BS issues, any one in the following manner detects the control information of the RS first order and the control information of the RS second level:
When bearing mode is the control information of the RS first order and the control information of the RS second level has incomplete same signaling structure, RS first carries out blind Detecting from the initial index of the CCE of described carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, the control information type detected is determined according to signaling structure, afterwards blind Detecting is carried out to the CCE be not detected, until detect another control information consistent with the RS_ID of this RS;
When bearing mode is that the control information of the RS first order and the control information of the RS second level have incomplete same signaling structure, and the CCE carrying the control information of the described RS first order and the control information of the RS second level is when having the relative position determined, RS first carries out blind Detecting from the initial index of the CCE of described carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, the control information type detected is determined according to signaling structure, afterwards from described relative position again carry out blind Detecting, until detect another control information consistent with the RS_ID of this RS.
8. method as claimed in claim 6, is characterized in that:
Described RS demodulates up-downgoing scheduling authorization information and the available resources information of this RS according to the RS first order control information detected and the control information of the RS second level, and be the user resource allocation that it covers according to described available resources information, formulate subscriber control information and be handed down to user, the UE_ID that described subscriber control information carrying is corresponding, after user receives the subscriber control information that described RS issues, blind check carries out demodulation after measuring the control information consistent with its UE_ID.
9. a distributed relay station control information receive-transmit system, this system comprises the relay station RS under base station BS and base station coverage, it is characterized in that:
Described BS comprises generation module and sending module;
Described generation module, for generating relay station control information, described RS control information comprises the up-downgoing scheduling authorization information and described RS available resources information that BS is described RS configuration;
Described BS is that the up-downgoing scheduling authorization information of RS configuration is called the control information of the RS first order, and the available resources information of distributing for RS is called the control information of the RS second level;
Described BS also comprises processing module, for determining the initial index of the control channel unit CCE carrying the control information of the RS first order, and is mapped on the CCE of relevant position by a bearing mode by the control information of the RS first order and the control information of the RS second level;
Described bearing mode comprises:
The CCE carrying the control information of the described RS first order and the control information of the RS second level has the relative position determined;
Described sending module, for sending described RS control information to RS;
Described RS comprises receiver module and blind Detecting module;
Described receiver module, for receiving the described RS control information that base station issues;
Described blind Detecting module, measures for blind check the up-downgoing scheduling authorization information and described RS available resources information that described BS is RS configuration.
10. system as claimed in claim 9, is characterized in that:
Described bearing mode is
The control information of the described RS first order and the control information of the RS second level have incomplete same signaling structure, and the CCE carrying the control information of the described RS first order and the control information of the RS second level has the relative position determined;
Described bearing mode is arranged by BS and RS or is determined rear notice RS by BS.
11. systems as described in claim 9 or 10, is characterized in that:
The control information of the RS first order is mapped on one or more CCE of starting with the initial index of the CCE of described carrying RS first order control information by described processing module, and maps the control information of the RS second level from a relative position;
When the CCE that bearing mode is carrying described RS first order control information and the control information of the RS second level has the relative position determined, described blind Detecting module first carries out blind Detecting from the initial index of the CCE of described carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, again blind Detecting is carried out from the CCE of described relative position, until detect another control information consistent with the RS_ID of this RS, and determine the control information of the RS first order and the control information of the RS second level by the relative position of the CCE of the control information of the RS first order and the control information of the RS second level,
When bearing mode is that the control information of the described RS first order and the control information of the RS second level have incomplete same signaling structure, and the CCE carrying the control information of the described RS first order and the control information of the RS second level is when having the relative position determined, described blind Detecting module first carries out blind Detecting from the initial index of the CCE of described carrying RS first order control information, after detecting the control information consistent with the RS_ID of this RS, the control information type detected is determined according to signaling structure, afterwards from described relative position again carry out blind Detecting, until detect another control information consistent with the RS_ID of this RS.
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