CN102484526B - Apparatus for transmitting and receiving control information for repeater and method thereof - Google Patents

Abstract

Disclosed are an apparatus for transmitting and receiving control information for a repeater and a method thereof. The repeater for receiving control information in a wireless communication system comprises: a receiving module for receiving through higher layer signaling from a base station the information on a resource block (RB) which the repeater should search to receive the control information; a processor for detecting the control information from the first RB by blind-decoding at least one received RB which should be searched; and a receiving module for receiving through the first RB from the base station the control information detected by the processor.

Description

Send and receive the Apparatus for () and method therefor of the control information being used for via node

Technical field

The present invention relates to wireless communication system, and more specifically, relate to a kind of Apparatus for () and method therefor for sending and receive the control information for via node.

Background technology

Briefly will describe third generation partner program Long Term Evolution (3GPP LTE) and senior LTE (" LTE-A ") communication system, it is the example can applying wireless communication system of the present invention.

Fig. 1 is the figure of the network configuration of the evolved universal mobile communication system (E-UMTS) schematically showing exemplarily property wireless communication system.E-UMTS system currently in 3 gpp just carries out its basic standardization from conventional UMTS system evolution.E-UMTS can be called as Long Term Evolution (LTE) system usually.For the details of the technical specification of UMTS and E-UMTS, with reference to " 3rd Generation Partnership Project; Technical Specification Group Radio Access Network " version 7 and version 8.

Comprise subscriber equipment (UE) 120, eNB (or eNode Bs or base station) 110a and 110b with reference to figure 1, E-UMTS and be positioned at the end of network (E-UTRAN) and be connected to the IAD (AG) of external network.ENB can send the multiple data flow for broadcast service, multicast service and/or unicast services simultaneously.

One or more community can be there is in each eNB.Community is set in use 1.25,2.5,5,10 and 20MHz bandwidth one for multiple UE provides down link or uplink transmission services.Different districts can be set to provide different bandwidth.ENB controls the data input and data output for multiple UE.ENB sends downlink schedule information about down link data will inform to corresponding UE by sending the time domain/frequency domain of data, coding, size of data and hybrid automatic repeat-request (HARQ) relevant information wherein.In addition, the uplink scheduling information about UL data sends to corresponding UE so that available time domain/frequency domain, coding, size of data and HARQ relevant information are informed to UE by eNB.The interface for sending customer service or service control can be used between eNB.Core network (CN) can comprise the network node, AG etc. that the user for UE registers.AG manages the mobility of UE based on tracing area (TA), and one of them TA comprises multiple community.

Although wireless communication technology has developed into the LTE based on Wideband Code Division Multiple Access (WCDMA) (WCDMA), the demand of user and supplier and expectation sustainable growth.In addition, because other wireless access technology continues development, the technology therefore will looked for novelty guarantees following competitiveness.Such as, the minimizing of the cost of every bit, the increase of service availability, the flexible use of frequency band, the power consumption be applicable to of simple structure, open interface and UE is required.

3GPP has performed the standardization of following technology recently.This technology is called as " LTE-A " in specification.One of difference between LTE system and lte-a system is the introducing of system bandwidth difference and via node.

The broadband of maximum 100MHz is supported in lte-a system plan.In order to realize this, lte-a system uses carrier aggregation or aggregated bandwidth by utilizing multiple frequency block to achieve wide bandwidth.Carrier aggregation uses multiple frequency block as a large logic frequency band so that use wider frequency band.The bandwidth of each frequency block can be defined based on the bandwidth of the system block used in LTE system.Component carrier is used to send each frequency block.

When channel status between eNB and UE is very poor in a wireless communication environment, via node (RN) can be installed between eNB and UE to provide the wireless channel of better channel status to UE.In addition, by introducing RN in the cell border areas with poor channel state, high data rate channel can be provided and cell serves area can be expanded.Therefore, RN is current is widely used as the technology being introduced into the wireless shadow region solved in wireless communication system.

The RN technology in past is limited to amplifying signal simply and sends the function of the repeater of amplifying signal, and recent technology has developed into more intelligent form.In addition, RN technology is indispensable in the reduction expansion cost of eNB and the maintenance cost of backhaul network (backhaul network), and Extension of service in the mobile communication system in future to cover and improve in data throughout be also indispensable.Along with the development gradually of RN technology, need the RN used in the conventional wireless communication system by new wireless communication system support.

Along with RN is introduced into the lte-a system as next generation mobile communication system, need the communication construction for supporting the wireless backhaul between eNB and RN.But, also do not carry out the research of resource allocation methods, control signal, data transmission method etc. for supporting wireless backhaul.

Summary of the invention

Technical problem

The one object of the present invention being designed to deal with problems is the method receiving RN node control information.

Be designed to the RN that another object of the present invention is to receive RN control information dealt with problems.

Be designed to the method that another object of the present invention is to send RN control information of dealing with problems.

Be designed to the eNB that another object of the present invention is to send RN control information dealt with problems.

It will be appreciated by those skilled in the art that the object utilizing the present invention to realize is not limited in specifically described object above, and according to the above and other object that following detailed description will more clearly be understood the present invention and can realize.

Technical scheme

Object of the present invention can realize by providing a kind of method for receiving the control information being used for RN in a wireless communication system at via node (RN) place, the method comprises: the information being received the RB that should search for about RN from eNB by top signaling, with receiving control information; At least one RB that should be searched by blind decoding comes from a RB detection control information; And receive by a described RB control information detected from eNB.

This method may further include: if control information detected from a RB, then from RB continuous print a 2nd RB detection control information; And the control information detected from the 2nd RB is received from eNB.

Control information in one RB and the 2nd RB can by sending for the R-PDCCH sent for the control information of via node, and R-PDCCH is re-used according to time division multiplexing (TDM) scheme in a RB and the 2nd RB, and be sent out by continuous print OFDM symbol in a RB and the 2nd RB according to pre-defined rule.

R-PDCCH can distribute to different RB or time slot and can have different transformats.

The R-PDCCH sent by a RB can be comprised DL and authorize, and the R-PDCCH sent by the 2nd RB can comprise UL to be authorized, wherein DL authorizes is that eNB sends the control information needed for data to via node, and it is that via node sends the control information needed for data to eNB that UL authorizes.

DL is authorized and can be sent by the OFDM symbol in a RB with OFDM symbol index 3,4,5 and 6, and UL is authorized and can be sent by the OFDM symbol in the 2nd RB with OFDM symbol index 7 to 13.

Object of the present invention can realize by providing a kind of via node (RN) being constructed to receiving control information in a wireless communication system, this RN comprises: receiver module, this receiver module is constructed to the information being received the RB that should search for about via node from eNB by top signaling, with receiving control information; And processor, at least one RB that this processor is constructed to by blind decoding should be searched comes from a RB detection control information, and wherein receiver module is constructed to be received from eNB the control information detected by processor by a RB.

Processor is constructed to when control information being detected from a RB from the 2nd RB detection control information following a RB, and wherein receiver module is constructed to receive from eNB the control information detected from the 2nd RB.

Object of the present invention can realize by providing a kind of method for sending the control information being used for via node (RN) in a wireless communication system at eNode B (eNB) place, the method comprises the multiple R-PDCCH sent for sending control information to via node, wherein R-PDCCH is re-used according to time division multiplexing (TDM) scheme, and is sent out by continuous print OFDM symbol multiple in same RB according to pre-defined rule.

R-PDCCH can be assigned to different RB or time slot and be sent out, and R-PDCCH can have different transformats.

A R-PDCCH in described multiple R-PDCCH can comprise DL and authorize, the 2nd R-PDCCH in described multiple R-PDCCH can comprise UL and authorize, it is that eNB sends the control information needed for data to via node that DL authorizes, it is that via node sends the control information needed for data to eNB that UL authorizes, one PDCCH can distribute to a RB and be sent out, and the 2nd PDCCH can be assigned to the 2nd RB and be sent out.

DL is authorized and can be sent by the OFDM symbol in a RB with OFDM symbol index 3,4,5 and 6, and UL is authorized and can be sent by the OFDM symbol in the 2nd RB with OFDM symbol index 7 to 13.

Object of the present invention can realize for the eNB sent in a wireless communication system for the control information of via node by providing a kind of, this eNB comprises sending module, this sending module is constructed to send the multiple R-PDCCH for sending control information to via node, and wherein R-PDCCH is re-used by TDM and is sent by continuous print OFDM symbol multiple in same RB according to pre-defined rule.

Advantageous effects

Be used for the method for control information of RN according to reception of the present invention, RN can effectively receiving control information to improve communication performance.

According to RN control information being distributed and being mapped to the method for specific resources and passing on the distribution of RN control information and the method for mapping, control information can be sent to RN by eNB effectively.

It will be appreciated by those skilled in the art that the effect utilizing the present invention to realize be not limited to above specifically described those, and more clearly will understand other advantage of the present invention from the following detailed description.

Accompanying drawing explanation

Be included to provide the accompanying drawing of a further understanding of the present invention that embodiments of the present invention are shown and together with the description for explaining principle of the present invention.In the accompanying drawings:

Fig. 1 is the figure of the E-UMTS network configuration schematically showing exemplarily property mobile communication system;

Fig. 2 illustrates the structure of the radio frames used in the 3GPP LTE system of exemplarily property mobile communication system;

Fig. 3 illustrates the uplink sub-frames of 3GPP LTE system and the structure of downlink subframe of exemplarily property mobile communication system;

Fig. 4 illustrates the down link running time-frequency resource network used in the present invention;

Fig. 5 illustrates the configuration of relay return link in wireless communication system and relaying access link;

Fig. 6 illustrates the exemplary resources region being distributed to RN in the 3GPP lte-a system of exemplarily property mobile communication system by eNB; And

Fig. 7 is the block diagram of the assembly illustrated according to equipment 50 of the present invention.

Embodiment

Now with detailed reference to preferred implementation with reference to the accompanying drawings of the present invention.The detailed description provided with reference to accompanying drawing is below intended to explain illustrative embodiments of the present invention, instead of the execution mode can implemented according to the present invention is only shown.Detailed description below comprises specific detail so that provide complete understanding of the present invention.But, it will be apparent to those of ordinary skill in the art that the present invention can implement when not having these specific detail.Such as, when supposing that use meets the system of one of 3GPP LTE series standard, the following detailed description is provided.But except the special characteristic that 3GPP LTE series standard is intrinsic, description below can be applicable to other mobile communication system any.

In some cases, known construction and device is omitted or illustrates in form of a block diagram, and the main key character paying close attention to construction and device, so that do not cover thought of the present invention.In this manual the identical Reference numeral of use is represented same or similar parts.

In the following description, term terminal refers generally to movement or the fixing user terminal device of such as subscriber equipment (UE), mobile radio station (MS) etc.In addition, term base station (BS) refers generally to any node at network end-point place communicated with UE, such as Node B, eNode B etc.

In mobile communication system, UE can receive information and information is sent to eNB by up link by down link from eNB.The information sent by UE or receive comprises data and control information and there is various physical channel according to the type of the information being sent by UE or receive and object.

Fig. 2 illustrates the structure of the radio frames used in the 3GPPLTE system of exemplarily property mobile communication system.

With reference to figure 2, a radio frames has the length of 10ms (327200Ts) and comprises ten subframes with equal sizes.Each subframe has the length of 1ms and comprises each two time slots with the length of 0.5ms (15360Ts).Here, Ts refers to and is expressed as Tx=1/ (15kHz × 2048)=3.2552 × 10 ^-8the sampling time of (about 33ns).Time slot comprises the multiple Resource Block in multiple OFDMs (OFDM) symbol in time domain or multiple Single Carrier-Frequency Division multiple access (SC-FDMA) symbol and frequency domain.

In LTE system, a Resource Block comprises 12 individual OFDM symbol of subcarrier × 7 (6) or SC-FDMA symbol.For sending the unit interval of data, namely Transmission Time Interval (TTI) can be set to one or more subframe.Above-mentioned wireless frame structure is exemplary, and the number of the subframe comprised in radio frames, the number of time slot comprised a subframe and the number of the OFDM symbol comprised in each time slot or SC-FDMA symbol can change in every way.

Fig. 3 illustrates the uplink sub-frames of 3GPP LTE system and the structure of downlink subframe of exemplarily property mobile communication system.

With reference to figure 3 (a), downlink subframe comprises two time slots in time domain.Maximum three OFDM symbol in the front portion of the first time slot in downlink subframe are corresponding to the control area being assigned control channel, and remaining OFDM symbol is corresponding to the data area being assigned physical down link sharing channel (PDSCH).

The example of the downlink control channel used in 3GPP LTE comprises physical control format indicator channel (PCFICH), physical downlink control channel (PDCCH), Physical Hybrid ARQ Indicator channel (PHICH) etc.PCFICH sends at the first OFDM symbol place of subframe and carries the information of the number (that is, control area size) of the OFDM symbol about the transmission for the control channel in subframe.Control information via PDCCH transmission is called down link control information (DCI).The up-link transmit power control command that DCI comprises uplink resource allocation information, downlink resource allocations information and organizes for any subscriber equipment (UE).PHICH carries response/non-response (ACK/NACK) signal about uplink hybrid automatic repeat request (HARQ).That is, the ack/nack signal about the uplink data sent from UE sends via PHICH.

To the PDCCH corresponding to downlink physical channel be described.

PDCCH can carry the activation etc. of the Resourse Distribute of PDSCH and transformat (can be called as DL to authorize), the resource allocation information (can be called as UL to authorize) of PUSCH, one group of transmission power control command about each UE in any UE group, IP phone (VoIP).Multiple PDCCH can send in control area.UE can monitor PDCCH.PDCCH comprises the set of one or more continuous print control channel element (CCE).PDCCH can send after sub-block interweaves in control area.CCE is the logical allocation unit providing code rate for the state based on wireless channel to PDCCH.CCE corresponds to multiple resource element group.That determine the form of PDCCH according to the correlation between the number of CCE and the code rate provided by CCE with bit number that is available PDCCH.

The control information that PDCCH carries is called as DCI.Table 1 illustrates the DCI according to DCI format.

[table 1]

DCI format 0 transmits uplink resource allocation information, and DCI format 1 to DCI format 2 is for representing downlink resource allocations information, and DCI format 3 and DCI format 3A represent that the up-link transmit power for UE group controls (TPC) order.

With reference to figure 3 (b), uplink sub-frames can be divided into control area and data area in a frequency domain.Control area is assigned with the PUCCH for carrying uplink control information.Data area is assigned with the PUSCH for carrying user data.In order to keep single-carrier property, when a UE is different, send PUCCH and PUSCH.PUCCH for a UE is assigned to the RB couple in subframe.Belong to the right RB of RB and take different sub carrier in corresponding two time slots.Distribute to the RB of PUCCH to frequency hopping in boundary of time slot.

Fig. 4 illustrates the down link running time-frequency resource network used in the present invention.The down link signal sent in each time slot can by comprising individual subcarrier and the resource grid of individual OFDM symbol describes. represent the number of downlink resource blocks (RB), represent the number of the subcarrier of a formation RB, and represent the number of OFDM symbol in a downlink time slots. depend on the downlink transmission bandwidth and demand fulfillment that arrange in respective cell here, represent the minimum downlink bandwidth that wireless communication system is supported, and represent the maximum downlink bandwidth that wireless communication system is supported.Although can be 6 and can be 110, but they be not limited thereto.The number of the OFDM symbol comprised in one time slot can depend on length and the subcarrier spacing of Cyclic Prefix (CP).When multiple antennas sends, each antenna port can define a resource grid.

The resource grid of element in to(for) each antenna port is called as resource element (RE) and is represented uniquely (k, l) by the index in time slot.Here, k represent from 0 to frequency domain index, and l represent from 0 to time Domain Index.

RB shown in Fig. 4 is for describing the mapping relations between physical channel and RE.RB can be divided into physics RB (PRB) and virtual RB (VRB).A PRB is restricted in time domain in individual continuous print OFDM symbol and frequency domain individual continuous print subcarrier.Here, with it can be predetermined value.Such as, with the value as shown in table 2 below can be had.Therefore, a PRB comprises individual RE.Although a PRB can correspond to a time slot in the time domain and correspond to 180kHz in a frequency domain, be not limited thereto.

[table 2]

A PRB has 0 in a frequency domain and arrives scope in value.PRB number n in frequency domain _pRBmeet with the relation in a time slot between resource element (k, l)

VRB and PRB has equal size.VRB can be divided into centralized VRB (LVRB) and virtual reality B (DVRB).For each VRB type, a pair VRB in two time slots of a subframe is assigned with single VRB numbering n _vRB.

VRB can have equal size with PRB, and for each LVRB and DVRB, a pair VRB with single VRB index (its can be called as VRB numbering) is assigned to two time slots in a subframe.In other words, first time slot in a subframe in two time slots is belonged to individual VRB be assigned with from 0 to in index in scope one, and belong to second time slot individual VRB be also assigned with from 0 to one in index in scope.

The relaying physical downlink control channel (R-PDCCH) used in the present invention represents the backhaul physical downlink control channel being used for relay transmission, and R-PUCCH represents the backhaul physical uplink control channel for relay transmission.Relaying physical down link sharing channel (R-PDSCH) represents the backhaul downlink physical data/shared channel being used for relay transmission, and R-PUSCH represents the backhaul uplink physical data/shared channel for relay transmission.

In lte-a system, when the link-attached function forwarded between eNB and UE is incorporated into RN, the link of two types with different attribute is applied to up link and downlink carrier band.The connecting link part set up between the link of eNB and RN is defined as back haul link.Use down-chain resource can be expressed as backhaul downlink according to the transmission of the back haul link of FDD or TDD scheme, and use uplink resource can be expressed as backhaul uplink according to the transmission of FDD or TDD scheme.

Fig. 5 is the figure of the configuration that relay return link in wireless communication system and relaying access link are shown.

Information and information is sent to eNB by relay backhaul uplink can be received by relay backhaul down link from eNB with reference to figure 5, RN.In addition, information can be sent to UE by relaying access downlink and receive information by relaying access up link from UE by RN.

In LTE system, RN can not receive PDCCH from eNB.If although the subframe of RN is set to shift to an earlier date two or three OFDM symbol compared to eNB, RN can receive PDCCH, the cooperation transmission between eNB and RN becomes difficulty.Because the semi-static characteristic of traffic load and backhaul link quality cause Dynamic Resource Allocation for Multimedia in the communication between eNB and UE can be unnecessary.That is, RN can be configured to use and depend on that the fixed frequency band for the sub-frame mode of predetermined backhaul communication sends signal by fixed modulation and encoding scheme (MSC).In addition, eNB can be RN Resources allocation according to distributed or centralized mode.

Be the method for the method of RN dynamic allocation of resources and the resource of reception and registration distribution by eNB by description.

With by Resourse Distribute to UE similarly, eNB in view of traffic load is to RN Resources allocation, and by physical control channel by the message notice about Resourse Distribute to RN.ENB needs additionally to arrange the new physical control channel for RN, keeps the compatibility with LTE version 8 simultaneously.Here, the new physical channel for RN is called as R-PDCCH, and is called as R-PDSCH for the data channel of RN.

Fig. 6 illustrates the exemplary resources region being distributed to RN in the 3GPP lte-a system of exemplarily property mobile communication system by eNB.

Fig. 6 (a) illustrates by time division multiplexing (TDM) multiplexing for the new physical control channel 610 of RN and the scheme of data channel 620 in the enb.As the R-PDCCH according to the multiplexing new physical control channel 610 corresponded to of TDM and the R-PDSCH corresponding to data channel 620, the sub-frame configuration (or setting) that backhaul transport for correspondence can be distributed by eNB is Multicast Broadcast Single Frequency Network (MBSFN) subframe, so that keep the compatibility with LTE version 8, and by TDM, new physical control channel 610 and data channel 620 are distributed to MBSFN data (part except control channel of MBSFN sub-frame) region.

As shown in Fig. 6 (b), the special frequency band in the subframe of distributing for backhaul transport is assigned to the physical control channel 630 for RN.That is, can carry out multiplexing with frequency division multiplexing (FDM) scheme for the physical control channel 630 of RN and data channel 640 and be dispensed in the PDSCH region of corresponding subframe.In this case, with eNB by Resourse Distribute to the identical mode of UE, Resourse Distribute is given each RN in view of the traffic load of RN by eNB, and by physical control channel 630, the resource of distribution is conveyed to RN.In addition, when keeping with LTE version 8 compatible, eNB can distribute the physical control channel 630 that add for RN.

As shown in Fig. 6 (c), in the subframe of distributing for backhaul transport, eNB can distribute specific frequency band as the physical control channel 650 for RN.They can be distributed in corresponding frequency band by the multiplexing physical control channel 650 for RN of TDM and data channel 660 by eNB.In this case, with eNB by Resourse Distribute to the identical mode of UE, Resourse Distribute is given each RN in view of the traffic load of RN by eNB, and by physical control channel 650, the resource of distribution is conveyed to RN.In addition, when keeping with LTE version 8 compatible, eNB can distribute the physical control channel 650 that add for RN.

As mentioned above, R-PDCCH is called as by the newly assigned physical control channel for RN of eNB.Each RN can use RN identifier (ID) blind search to be the resource of down link backhaul transport and dynamic assignment.Namely, each RN can use its RN ID blind decoding to send the time domain/frequency domain of the R-PDCCH of dynamic assignment wherein, be used for its R-PDCCH with detection and obtain DL mandate, UL mandate and control information (such as, ACK/NACK feedback information) from the R-PDCCH detected.ENB can by top signaling by the message notice of RB that should search for about RN to RN.RN can perform blind search (or blind decoding) based on the received information about RB that should be searched.Here, top signaling corresponds to the semi-static signaling from eNB to RN.

The down link backhaul data channel R-PDSCH being sent to each RN from eNB can be distributed: multiplexing by TDM and R-PDCCH the backhaul subframe shown in Fig. 6 (a) by following manner; Multiplexing by FDM and R-PDCCH in the backhaul subframe shown in Fig. 6 (b); And in the backhaul subframe shown in Fig. 6 (c) by the mixed form of TDM, FDM or TDM and FDM and R-PDCCH multiplexing.

Can RN specifically (RN-specifically) determine that each RN performs the search volume of blind search, and specific for RN search volume can be sent to each RN by top signaling by eNB.Or, specifically can determine search volume in community, and the information (such as, the information about RB that should be searched) about search volume can be broadcast to all RN by the specific system information in community by eNB, or by top signaling, information is sent to each RN.The specific search volume in the specific search volume of RN or community conveying to each RN can comprise the subset of RB.In this case, eNB can send corresponding RN to by corresponding to the OFDM symbol index explicitly of R-PDCCH sent, or corresponds to the OFDM symbol index of the R-PDCCH sent or time slot index can implicitly fixedly make RN to know.

Can use the ID of RN R-PDCCH is sent to RN or by grouping about RN information instead of individually represent that its ID sends R-PDCCH to RN.When identifying R-PDCCH based on RN ID, each RN can configure the ID group that RN should search for.Alternatively, by the logical message position based on RN ID identifying information, the information about each RN can be obtained, independently decode with RN simultaneously.In this case, decoding is performed under the state be grouped at the control information item of multiple RN.

When being applied to the backhaul in lte-a system when carrier aggregation, can configure about RN should blind search carrier wave information and can by top signaling or use L1/L2 control information semi-statically by this communicating information to RN.Alternatively, RN can blind Detecting (search) all candidate carrier.

Use description to R-PDCCH transmission detailed resource mapping scheme and according to the blind search method in the RN of resource mapping scheme.Before this, concise and to the point description in LTE system maps by eNB the scheme being used for the resource that PDCCH transmits.

In general, eNB can send Scheduling assistance information and control information by PDCCH.Physical control channel can be sent by one or more CCE.A CCE comprises nine resource element groups (REG).The number not distributing to the REG of PCFICH or PHICH is N _rEG.System can CCE be 0 to individual.PDCCH supports multiple format as shown in Table 3 below.The PDCCH being configured with n continuous CCE starts with the CCE performing i mod n=0 (i represents CCE number).Multiple PDCCH can be sent by a subframe.

[table 3]

PDCCH form	The number of CCE	The number of resource element group	The number of PDCCH position
				0	1	9	72
1	2	18	144
				2	4	36	288
3	8	72	576

The number in the region sent control information can be determined PDCCH form based on eNB by reference table 3, eNB.UE can reduce overhead by reading control information based on CCE.Similarly, RN can read control information based on R-CCE.

In lte-a system, resource element (RE) can be mapped so that send the R-PDCCH being used for any RN based on R-CCE.By description when eNB dynamic allocation of resources is to send R-PDCCH by the method for resource mapping to RE.

The resource mapping scheme 1> of < in Dynamic Resource Allocation for Multimedia situation

First scheme can in the time domain fixed OFDM symbol (such as, there is the OFDM symbol of index 3 to 6) and the number changing RB in a frequency domain to send R-PDCCH.

When the basic logic unit that the R-PDCCH for specific RN sends is restricted to R-CCE, determine the modulation scheme of R-CCE transmission according to the link-quality between eNB and RN.When determining modulation scheme, the number of the RE needed for transmission R-CCE and the index for the OFDM symbol that sends R-PDCCH are set.Implicitly can be fixed for the one or more OFDM symbol sending R-PDCCH, or OFDM symbol can be conveyed to RN by explicitly by eNB.When OFDM symbol is conveyed to RN by eNB explicitly, eNB can use RN to be specifically worth by top signaling and OFDM symbol is conveyed to RN.Or eNB can use the form of the specific system information in specific Zhi Yi community, community that OFDM symbol is broadcast to all RN, or by top signaling community is specifically worth and sends to each RN.

Take RB as the mapping that unit carries out R-CCE a to RE.RB basis can be that RB is to unit.Although eNB can explicitly by the size of a R-CCE (namely, the number that RB or RB is right) convey to each RN, but the size of a R-CCE implicitly can be determined according to the OFDM symbol of modulation scheme and use, and RN implicitly can know the size of a R-CCE.RN can be polymerized rank based on R-CCE size and R-CCE and perform blind decoding.Such as, when the size of a R-CCE is 4 RB couple, RN can by four continuous RB in units of perform blind search.

In addition, can be each multiple search volume of R-CCE polymeric configuration.When determining the right number of the RB needed for transmission R-CCE, arrange according to other search volume of R-CCE polymer grade.RN is polymerized rank according to R-CCE and comes each search volume of blind search with the RB size of space.

According to the link-quality of each RN, the R-CCE paradigmatic structure based on variable R-CCE size can be applied, instead of based on being fixed to the R-CCE paradigmatic structure of R-CCE size of each RN.

R-CCE size can depend on the specific or specific search volume, community of the RN for any RN.Such as, when specific for the RN of RN1 search volume 1, R-CCE size corresponds to two RB couple, and when specific for the RN of RN1 search volume 2, R-CCE size corresponds to three RB couple.RN can perform blind search based on the R-CCE size of correspondence.The modulation order sent for R-CCE can be fixed to a value.

R-CCE can comprise one group of continuous print subcarrier in a frequency domain.Subcarrier can be distributed, or sub-carrier subset can be distributed, and the subcarrier belonging to each subset is centralized.R-CCE can comprise the Searching point for searching for the specific information of RN, and can be used as the unit detecting and be delivered to the control information of RN group or all RN.Although can have identical structure for the R-CCE that sends the specific control information of RN and the R-CCE for control information being delivered to RN group and all RN, they preferably have different structures.

The base unit of R-CCE can be set to such as 1/2RB to, 1/3RB to etc. the common divisor (such as, the common divisor of 12) of the right total number of sub-carriers of RB or a subcarrier.In addition, the part RB that can combine multiple RB centering is to form a R-CCE.

Search volume from R-CCE can be restricted to public search space or the specific search volume of RN for a RN.The size of search volume can depend on the number of the carrier wave of use.R-CCE can be constructed to send control information by means of only dedicated search space according to subcarrier.DL authorizes and UL authorization message can be encoded with generated codeword respectively and be mapped to search volume.Alternatively, DL mandate and UL authorization message can be jointly encoded only to generate a code word.

To describe the execution mode of following proposal, the program is fixed corresponding one or more OFDM symbol in the time domain and changes the right number of RB in a frequency domain to send R-PDCCH, as mentioned above.

Suppose 16 quadrature amplitude modulation (QAM) to be applied to RN1 as the modulation scheme being used for R-PDCCH transmission, and the modulation scheme being used for R-PDCCH transmission is applied to RN2.R-PDCCH modulation scheme for RN is exemplary, and same modulation scheme can implicitly be applied to all RN.In addition, suppose that backhaul subframe uses conventional CP, for RN1 and RN2, send R-PDCCH by the OFDM symbol with index 3,4,5 and 6, and the OFDM symbol not transmitting channel status indicator reference signal (CSI-RS) by having index 3,4,5 and 6.

Based on this hypothesis, by a RB, 44 are become to the available RE number sending R-PDCCH, therefore, 176 bits altogether can be sent for RN1, and 88 bits can be sent for RN2.

For RN1, if R-PDCCH is set to correspond to the right R-CCE size of two RB, then search volume 1 (such as, RB is to index 0 to 15) be set to perform the blind search based on R-CCE polymerization 1, search volume 2 (such as, RB is to index 16 to 31) be set to perform the blind search based on R-CCE polymerization 2, and search volume 3 (such as, RB is to index 32 to 63) be set to perform the blind search based on R-CCE polymerization 4, 16/2=8 blind decoding operation is performed in search volume 1, 16/4=4 blind decoding operation is performed in search volume 2, and in search volume 3, perform 32/8=4 blind decoding operation, to produce 16 blind decoding operations altogether.

For RN2, if R-PDCCH is set to correspond to the right R-CCE size of four RB, then search volume 1 (such as, RB is to index 16 to 31) be set to perform the blind search based on R-CCE polymerization 1, search volume 2 (such as, RB is to index 32 to 63) be set to perform the blind search based on R-CCE polymerization 2, and search volume 3 (such as, RB is to index 64 to 95) be set to perform the blind search based on R-CCE polymerization 4, RN2 performs 16/4=4 blind decoding operation in search volume 1, 32/8=4 blind decoding operation is performed in search volume 2, and in search volume 3, perform 32/16=2 blind decoding operation.

The resource mapping scheme 2> of < in Dynamic Resource Allocation for Multimedia situation

Use description to R-PDCCH send another resource mapping scheme and according to the blind search scheme in the RN of resource mapping scheme.The alternative plan R-CCE being used for sending the R-PDCCH being used for any RN being mapped to RE is fixed the number of RB in a frequency domain and is changed the number of OFDM symbol in the time domain.

When Dynamic Resource Allocation for Multimedia, if described above in resource mapping scheme 1, the basic logical block that the R-PDCCH being used for RN sends be defined as R-CCE, then determine the modulation scheme of R-CCE transmission based on the link-quality between eNB and RN.After determining modulation scheme, the number of the RE needed for determining unit R-CCE sends and send R-PDCCH via the right number of RB.

By carry out R-CCE send institute via the number of one or more OFDM symbol sent for R-CCE of RB centering determine R-CCE polymerization rank.That is, when R-CCE polymerization rank is 1, an OFDM symbol sends for R-CCE, and when R-CCE polymerization rank is 2, two OFDM symbol are used for R-CCE transmission, and when R-CCE polymerization rank is 3, three OFDM symbol are used for R-CCE transmission.

Multiple search volume can be set for each R-CCE polymerization.After the number determining the VRB needed for transmission R-CCE, arrange based on other search volume of R-CCE polymer grade.Search volume can have identical RB position.RN can be polymerized rank with the number blind search search volume of the identical RB size of space based on OFDM symbol according to R-CCE.

That is, RN can perform blind search to search volume 1 based on an OFDM symbol, and performs blind search to search volume 2 based on two OFDM symbol.

Resource mapping scheme 3> in < Dynamic Resource Allocation for Multimedia situation

Use description to R-PDCCH send another resource mapping scheme and according to the blind search scheme in the RN of this resource mapping scheme.The third program R-CCE being used for sending the R-PDCCH being used for any RN being mapped to RE fixes the number of RB and the number of fixed OFDM symbol in the time domain in a frequency domain, and changes modulation scheme.

The different modulation schemes sent for R-PDCCH can be used for each search volume.Such as, for RN1, when search volume 1, eNB can send R-PDCCH based on QPSK scheme, and sends R-PDCCH based on 16QAM scheme when search volume 2.

Resource mapping scheme 4> in < Dynamic Resource Allocation for Multimedia situation

R-CCE for configuring the R-PDCCH of RN can use frequency-domain and time-domain to generate search volume.That is, when the amount of control information increases, one or more OFDM symbol in time domain can be used to configure R-CCE.In addition, can based on the amount of information or frequency diversity configuration in a frequency domain multiple RB to the R-CCE of upper restriction.According to the above-mentioned expansion in time domain/frequency domain, the search volume based on R-CCE can by crossing over a base unit be configured to for R-PDCCH code word of decoding in time domain and frequency domain.In addition, search volume can be divided into the region corresponding to the item that sends control information (that is, DL mandate, UL authorize and ACK/NACK) number in time domain/frequency domain.

The mixed form of above-mentioned four resource mapping schemes can be used when the Dynamic Resource Allocation for Multimedia sent for R-PDCCH.

The form of the R-PDCCH being sent to RN from eNB will briefly be described.Table 4 illustrates the form of the R-PDCCH being sent to RN from eNB.

[table 4]

R-PDCCH form	Content
		R-PDCCH form 0	The UL sent for R-PUSCH authorizes
R-PDCCH form 1 and 2 series	The DL sent for R-PDSCH authorizes
		R-PDCCH form 3 series	TPC (transmission power control) orders

R-PDCCH can use the DCI format being different from the form used by old-fashioned or LTE-AUE.

The situation being used for the R-PDCCH of RN1 is sent by describing eNB.When eNB sends the multiple R-PDCCH being used for RN1, eNB can use continuous OFDM symbol according to the multiplexing multiple R-PDCCH of TDM scheme identical RB or RB centering according to pre-defined rule, and sends multiplexing R-PDCCH.Such as, when by when in the first time slot, four OFDM symbol (corresponding to OFDM symbol index 3,4,5 and 6) send a R-PDCCH of RB centering, by the second time slot transmission the 2nd R-PDCCH that RB is right.Here, described multiple R-PDCCH has different-format.Such as, the form of described multiple R-PDCCH can comprise the R-PDCCH form 1 and 2 of authorizing for sending DL, and R-PDCCH form 0, the DL mandate for sending UL mandate is that eNB sends the control information needed for data to RN, it is that RN sends the control information needed for data to eNB that UL authorizes.DL authorizes and can be assigned to the first time slot and be sent out, and UL mandate can be assigned to the first time slot continuous print second time slot and be sent out.Especially, can be authorized by continuous OFDM symbol transmission DL by four of corresponding to OFDM symbol index 3,4,5 and 6 according to pre-defined rule, and send UL mandate according to seven continuous OFDM symbol that pre-defined rule sends by corresponding to OFDM symbol index 7 to 13.

When eNB sends multiple R-PDCCH to specific RN, RN can one of them R-PDCCH of blind search so that be appreciated that the position of the RB of other R-PDCCH that RN sends.That is, identical frequency by continuous print OFDM symbol according to TDM scheme multiplexing to RN send R-PDCCH and these R-PDCCH are sent to RN.

When RN detects a R-PDCCH, RN performs blind decoding to continuous print OFDM symbol again.If RN is by successfully receiving the additional R-PDCCH of other form to the blind decoding of continuous print OFDM symbol, then RN can blind decoding continuous print OFDM symbol subsequently again.In addition, RN performs blind decoding until RN is failed from the R-PDCCH that the RB midline detect of correspondence is additional.

For RN1, suppose that the OFDM symbol to having index 3,4,5 and 6 performs R-PDCCH blind search, a search volume (RB index 0 to 31) is searched for the R-CCE size corresponding to 2 RB right, send DL to authorize and UL mandate, and by only corresponding to the OFDM symbol of OFDM symbol index 3,4,5 and 6 in the RB centering blind search with index 0 to 31, from corresponding to the RB of index 24 to successfully detecting that DL authorizes.Due to from there is the RB of index 24 to successfully detecting that DL authorizes, therefore, RN1 can perform blind decoding to the OFDM symbol with index 7 to 13 further, so that check whether the additional R-PDCCH that therefore existence sends, this OFDM symbol with index 7 to 13 is corresponding to another RB of RB centering with index 24.In this case, successfully have the OFDM symbol of index 7 to 13 from the RB centering with index 24 detect UL authorize after, RN1 can next RB of blind decoding to the RB of index 25 (that is, have to) so that confirm there is not additional R-PDCCH.

Describe and in continuous print RB, distributed multiple R-PDCCH according to TDM scheme and carry out situation about sending.Similarly, the method for being distributed multiple R-PDCCH by continuous print RB according to FDM scheme can be considered.

Fig. 7 is the block diagram of the assembly illustrated according to equipment 50 of the present invention.

With reference to figure 7, equipment 50 can be UE, eNB or RN.Equipment 50 comprises processor 51, memory 52, radio frequency unit (RF unit) 53, display unit 54 and user interface section 55.

Radio interface protocol layer is implemented in processor 51.Processor 51 provides chain of command and user face.The function of each layer can be implemented in processor 51.Memory 52 is connected to processor 51 and storage operation system, application program and general file.

Display unit 54 shows information, and can use the such as well known elements such as liquid crystal display (LCD), Organic Light Emitting Diode (OLED).

User interface section 55 can according to the formal construction of the known user interface of such as keyboard, touch-screen etc.

RF unit 53 is connected to processor 51 and send/receive wireless signal.RF unit 53 can be divided into processor sending module (not shown) and receiver module (not shown).

Radio interface protocol layer between UE and network can be divided into ground floor L1, second layer L2 and third layer L3 based on lower three layers of open system interconnection (OSI) known in communication system.Physical layer belongs to ground floor and provides formation transfer service by physical channel.Wireless heterogeneous networks (RRC) layer belongs to third layer and provides the Radio Resource between UE and network.UE and network exchange RRC information by rrc layer.

Embodiments of the present invention described below are combinations of element of the present invention and feature.Feature or element can be considered as optionally, except as otherwise noted.Each element or feature can when not implementing with when other element or Feature Combination.In addition, embodiments of the present invention can be constructed by built-up section element and/or feature.The operating sequence described in embodiments of the present invention can reset.Some structures of any one execution mode can be included in another embodiment and can be replaced by the correspondence structure of another execution mode.It will be apparent to one skilled in the art that in claims that the claim not having to quote each other clearly can be included as new claim as embodiments of the present invention or after the application submits to by subsequent modification in combination.

Can be realized by various means according to the embodiment of the present invention, such as, can be realized by hardware, firmware, software or its combination.In hardware construction, embodiments of the present invention can be passed through one or more application-specific integrated circuit (ASIC) (ASIC), digital signal processor (DSP), digital signal processing device (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, microcontroller, microprocessor etc. and realize.

In firmware or software construction, embodiments of the present invention can by performing a kind of module of above-mentioned functions or operation, process, function implement.Software code can store in a memory cell and then be performed by processor.Memory cell can be positioned at the inside of processor or outside by various known devices data be sent to processor and receive data from processor.

Those skilled in the art will be appreciated that, when not departing from spirit of the present invention and basic special type, the present invention can implement with other particular form except the form set forth here.Therefore foregoing description is appreciated that exemplary instead of restrictive in all respects.Scope of the present invention should be determined by the reasonable dismissal of claims and the institute fallen in equivalency range of the present invention changes and is intended to comprise within the scope of the invention.

Industrial applicibility

Can be applied to for the equipment of the control information of RN and method the various mobile communication system comprising 3GPP LTE, LTE-A, IEEE 802 etc. for sending and receiving.

Claims (15)

1., in a wireless communication system in the method that eNode B (eNB) place sends control information, said method comprising the steps of:

The first time slot in the subframe of configuration or Resource Block (RB) centering for via node (RN) send the first relaying physical downlink control channel (R-PDCCH) comprising the downlink allocation information for described RN; And

The second time slot in the subframe of described configuration or the described RB centering for described RN send the 2nd R-PDCCH of the uplink assignment information comprised for described RN.

2. the method for claim 1, wherein OFDM (OFDM) notation index 3,4,5 and 6 of a described R-PDCCH in described first time slot of the subframe of described configuration sends.

3. the method for claim 1, wherein OFDM (OFDM) notation index 7,8,9,10,11,12 and 13 of described 2nd R-PDCCH in described second time slot of the subframe of described configuration sends.

4. be the method for claim 1, wherein down link mandate for the described downlink allocation information of described RN.

5. be the method for claim 1, wherein uplink grant for the described uplink assignment information of described RN.

6. the method for claim 1, wherein the transformat of a described R-PDCCH is different from the transformat of described 2nd R-PDCCH.

7., in a wireless communication system in a method for via node (RN) place receiving control information, said method comprising the steps of:

The first time slot from the subframe of configuration or the search of Resource Block (RB) centering for described RN comprise the first relaying physical downlink control channel (R-PDCCH) of the downlink allocation information for described RN; And

The second time slot from the subframe of described configuration or the described RB centering search for described RN comprise the 2nd R-PDCCH of the uplink assignment information for described RN.

8. method as claimed in claim 7, the method is further comprising the steps of:

The subframe of stating configuration about described is received or for the right information of the Resource Block (RB) of described RN from eNode B by top signaling.

9. method as claimed in claim 7, wherein, OFDM (OFDM) notation index 3,4,5 and 6 of a described R-PDCCH in described first time slot of the subframe of described configuration sends.

10. method as claimed in claim 7, wherein, OFDM (OFDM) notation index 7,8,9,10,11,12 and 13 of described 2nd R-PDCCH in described second time slot of the subframe of described configuration sends.

11. methods as claimed in claim 7, wherein, the described downlink allocation information for described RN is down link mandate.

12. methods as claimed in claim 7, wherein, the described uplink assignment information for described RN is uplink grant.

13. 1 kinds in a wireless communication system at the device that eNode B (eNB) place sends control information, described device comprises:

The first time slot for the subframe in configuration or Resource Block (RB) centering for via node (RN) send the unit comprising the first relaying physical downlink control channel (R-PDCCH) of the downlink allocation information for described RN; And

The second time slot for the subframe in described configuration or the described RB centering for described RN send the unit of the 2nd R-PDCCH of the uplink assignment information comprised for described RN.

14. 1 kinds in a wireless communication system at the device of via node (RN) place receiving control information, described device comprises:

The first time slot for the subframe from configuration or the search of Resource Block (RB) centering for described RN comprise the unit of the first relaying physical downlink control channel (R-PDCCH) of the downlink allocation information for described RN; And

The second time slot for the subframe from described configuration or the described RB centering search for described RN comprise the unit of the 2nd R-PDCCH of the uplink assignment information for described RN.

15. devices as claimed in claim 14, this device also comprises:

For receiving the subframe of stating configuration about described or the unit for the right information of the Resource Block (RB) of described RN by top signaling from eNode B.