CN101925077A - Transmission and indication method and device for relay system - Google Patents
Transmission and indication method and device for relay system Download PDFInfo
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Abstract
The invention provides a transmission and indication method for a relay system, which comprises the following steps: using a base station to send indication information to a terminal, wherein the indication information is used for indicating frequency band resource information of a special region transmitted by a relay downlink backhaul and the size of a control signal channel transmission region of the special region; using the base station to send scheduling signaling for transmitting downlink data to the terminal; and using the base station to send the downlink data on corresponding frequency band resources to the terminal. The technical scheme can solve the problem of utilizing the resources which are not occupied in the resources of a relay downlink backhaul link and fully utilize the downlink resources for providing services for users by carrying out distribution and indication on all the reserved resources which are not occupied by the relay downlink backhaul link.
Description
Technical field
The present invention relates to wireless communication field, particularly, the present invention relates to a kind of method and apparatus of transmission and indication of relay system.
Background technology
Move the developing direction that becomes modern communication technology with the broadband, 3GPP (3rd GenerationPartnership Project, third generation partner program) is devoted to LTE (Long TermEvolution, Long Term Evolution) system is as the evolution of 3G system, and target is that development 3GPP wireless access technology is towards high data rate, the low delay and the evolution of optimization packet data application direction.In the mobile communication system in future, for example among back three generations (B3G:Beyond three Generation) or the LTE-A, system will provide higher peak data rate and cell data throughput, so system also needs wideer transmission bandwidth.At present the following unappropriated radio frequency resources of 2GHz seldom, the part or all of bandwidth that the B3G system needs can only for example be sought on the frequency more than the 3GHz on higher frequency range.Frequency range is high more, and it is fast more that radio wave propagation is decayed, and transmission range is short more, therefore under the condition of same overlay area, guarantee continuous covering, needs more base station.Because the base station is the higher cost of cost usually, this can increase the cost of arranging net of communication system undoubtedly.In order to reduce the cost of arranging net, each manufacturer and standardization body begin one's study RN (Relay Node, via node) are incorporated in the cellular system, wish that the signal of energy expanding system covers and increase the capacity of system.Because via node RN only realizes simple data processing function usually, so the cost cost is lower than the base station, reasonably uses RN to arrange net, and can reach the purpose that reduces the cost of arranging net.
Relay transmission scheme in the LTE-A system studying with design process in, main design object comprises the RN of (In-band) transmission in half-duplex and the band.So-called half-duplex, i.e. the RN operation that on same frequency, can not receive simultaneously and send out.In the so-called band, be that identical frequency resource is used with transfer of data and the transfer of data between base station and Macro UE and Relay and the Relay-UE between the Relay in the base station, in relay system, the UE that is directly served by the base station is called Macro UE, and the UE that is directly served by Relay is called Relay-UE.
In relay system, frame structure can be divided into each following zone:
Descending access zone, base station and RN send data to Macro UE and Relay UE respectively;
Down mixing zone, base station send data to RN and Macro UE;
Up access zone, Macro UE and Relay UE send data to base station and RN respectively;
Up Mixed Zone, Macro UE and RN send data to the base station.
In order to make the Relay network can compatible Rel-8 UE, keep Relay UE identical frame structure to be arranged with Macro UE, just some subframe does not send or receives, adopted the mode of MBSFN subframe to realize the transfer of data of repeated link, as shown in Figure 1, for the MBSFN subframe is used for the schematic diagram that the Relay frame transmits, this scheme is as follows:
In up Mixed Zone, promptly RN is when the base station sends data, and Relay UE mourns in silence and promptly do not transmit any upward signal; In the down mixing zone, be that the base station is when RN sends data, the frame structure of Relay is configured to the MBSFN subframe, the descending control signaling zone that promptly has 1 or 2 OFDM symbol, (Relay can not receive and come from signal of base station this moment to the UE of its service transmission descending control signaling to be used for Relay, Relay receives the repeated link data that send the base station after this, and at this moment Relay does not send data to the UE of its service.Fig. 1 has provided the Relay transmission plan based on the tdd frame structure.In the down mixing zone, it is that transmit the multiplexing data area of together passing through the MBSFN subframe that base station transmits is given the repeated link data of Relay and control signaling.
The at present a kind of transmission of possible relay system and the channel architecture of indication as shown in Figure 2, descending backhaul (backhaul) subframe by the definition relaying realizes.The descending backhaul subframe of relaying refers to the base station sends downlink data to RN subframe.RN can become this sub-frame configuration the MBSFN subframe.On the OFDM of preceding several control areas symbol, the base station can send PCFICH (PhysicalControl Format Indication Channel, Physical Control Format Indicator Channel), PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel), PHICH (PhysicalHARQ Indication Channel, the automatic request retransmission indicating channel of physical mixed), RN sends PDCCH for its UE simultaneously, these signals can be and the system compatible of 3GPP Rel-8 that this moment, RN can not receive the PDCCH that the base station sends on identical OFDM symbol.At the later OFDM symbol of the OFDM of preceding several control areas symbol is to be used for transmitting PDSCH, also can be used for the descending back haul link of relaying simultaneously.Transmission for the descending back haul link of relaying, need be at descending PDSCH (Physical Downlink Shared Channel, one section special area on the frequency domain is set Physical Downlink Shared Channel), special area as shown in Figure 2, in this inner control zone, zone, be the R-PCFICH/R-PDCCH/R-PHICH part, with the data area be that R-PDSCH is time-multiplexed, wherein be designated the channel of communicating by letter for the ease of understanding with via node with R-.Control area length is indicated by R-PCFICH.What wherein R-PCFICH took is first OFDM symbol of special area, and the position of its transmission and the band resource of special area have fixing mapping relations.Special area takies continuous or discrete M PRB on frequency domain right, and the frequency domain position that this M PRB is right can be that prenotice to Relay the base station, also can adjust by semi-static method.
Yet usually the descending back haul link of relaying has adopted the mode of semi-static resource reservation to transmit, and the descending back haul link that relaying occurs through regular meeting can not take the situation of all reserved resources, for example situation as shown in Figure 3.Therefore be necessary to propose the corresponding techniques scheme, carry out the reasonable distribution utilization for the unappropriated resource in the descending back haul link resource of relaying, thereby effectively improve systematic function.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, particularly do not take all reserved resources and distribute and indicate, solve the problem of the utilization of the unoccupied resource in the descending back haul link resource of relaying by descending back haul link to relaying.
In order to achieve the above object, one aspect of the present invention has proposed a kind of method of transmission and indication of relay system, it is characterized in that, may further comprise the steps: the base station sends indication information to terminal, and described indication information is used to indicate the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region; Described base station sends the dispatch of downlink data transmission to described terminal; Described base station sends downlink data to described terminal on the frequency band corresponding resource.
The present invention has also proposed a kind of method of transmission and indication of relay system on the other hand, may further comprise the steps: terminal receives the indication information that the base station sends, and described indication information is used to indicate the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region; Terminal receives the base station and sends PDCCH, obtains current self the resource indication of PDSCH transmission, judges that according to described resource indication current PDSCH transmits the band resource S-PDSCH of the special area that whether takies the descending backhaul transport of relaying; Described terminal receives corresponding PDSCH data.
The present invention has also proposed a kind of base station on the other hand, comprises sending module and computing module,
Described sending module is used for to sending indication information, is used to indicate the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region, and sends the dispatch of downlink data transmission to described terminal; Described computing module is used for according to described indication information and described dispatch, the right number b of brachymemma PRB that comprises among number a that the General Physics Resource Block PRB that comprises among the Computational Physics DSCH Downlink Shared Channel PDSCH is right and the special-purpose Physical Downlink Control Channel S-PDSCH, and calculate corresponding transmission block size TBS; Described sending module sends downlink data to described terminal according to the corresponding TBS that described computing module obtains on the frequency band corresponding resource.
The present invention has also proposed a kind of terminal on the other hand, comprises receiver module and judge module,
Described receiver module is used to receive the indication information that the base station sends, described indication information is used to indicate the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region, receive the base station and send PDCCH, obtain current self the resource indication of PDSCH transmission, judge according to described resource indication whether current PDSCH transmission takies the band resource S-PDSCH of the special area of the descending backhaul transport of relaying, and be used to receive corresponding PDSCH data; Described judge module is used for judging according to described resource indication whether current PDSCH transmission takies the available band resource S-PDSCH of the special area of the descending backhaul transport of relaying, and determines corresponding PDSCH data.
The technical scheme that the present invention proposes, not taking all reserved resources by the descending back haul link to relaying distributes and indicates, the problem of the utilization of the unoccupied resource in the descending back haul link resource of solution relaying makes full use of downlink resource and provides service for the user.The such scheme that the present invention proposes, very little to the change of existing system, can not influence the compatibility of system, and realize simple, efficient.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is used for the schematic diagram of Relay frame transmission for the MBSFN subframe;
Fig. 2 is the schematic diagram of the channel architecture of relay system;
There is the schematic diagram of idling-resource in Fig. 3 for relay system;
Fig. 4 is the schematic diagram of resource indication type 0;
Fig. 5 is the schematic diagram of resource indication Class1;
Fig. 6 is the flow chart of the method base station side of a kind of transmission of relay system and indication;
Fig. 7 is the schematic diagram of the transmission and the indication of relay system;
Fig. 8 is the flow chart of the method end side of a kind of transmission of relay system and indication;
Fig. 9 is the transmission of relay system and the structural representation of indicating equipment.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
For the ease of understanding the present invention, simply introduce the mode of resource indication among the LTE below.
The mode that is used for the resource indication among the LTE mainly contains 3 kinds: resource indication type 0, resource indication Class1, resource indication type 2.Specifically provided detailed definition, be briefly described below at 36.213 kinds:
Resource indication type 0:
The implementation of resource indication type 0 is by with the granularity of P Resource Block (RB) as scheduling of resource, if there is N in system so in the LTE system
RBIndividual resource, the resource with system is divided into so
Individual resource group is indicated the resource group that takies by the mode of Bitmap, and its bit number is
The size of P is relevant with the bandwidth of system.In LTE-A, need to adjust the size of P, specifically as shown in Figure 4 according to the bandwidth of carrier aggregation.
Resource indication Class1:
The implementation of resource indication Class1 is with the granularity of P Resource Block (RB) as scheduling of resource, if there is N in system so in the LTE system
RBIndividual resource, the resource with system is divided into so
Individual resource group is a P subclass with whole set of resources, uses
Individual bit is represented the numbering of the subclass of resource group, adopt 1 bit to represent that the original position of resource is (from the numbering of the RB of minimum, still from the numbering of the RB of maximum), represent that with the mode of bitmap the resource of subclass in each resource group is indicated, its bit number is
Specifically as shown in Figure 5.The position that resource indication Class1 indicating means can not be indicated is represented in the position of its hollow, but can be by the indication of change original position.Resource indication type 0 is the same with the bit number that resource indication Class1 takies.The size of P is relevant with the bandwidth of system.In LTE-A, need to adjust the size of P according to the bandwidth of carrier aggregation.
Resource indication type 2:
The form of PDCCH DCI comprises multiple Format Types such as 1A, 1B, 1C, 1D in LTE.
For PDCCH DCI format 1A, 1B or 1D, Type 2 to being base unit, indicates continuous resource with RIV with PRB, wherein, RIV by initial PRB to position (RB
Start) and continuous P RB to number (L
CRBs).
The coding method program representation of RIV is
else
L wherein
CRBs〉=1 and be no more than
For PDCCH DCI format 1C, Type 2 with
Individual PRB is to being base unit, wherein
The number right with total PRB of system is relevant, and RIV can indicate original position
With continuous resource size
The coding method program representation of RIV is
else
Wherein
And
While L '
CRBs〉=1 and be no more than
In order to realize the present invention's purpose, the present invention proposes a kind of method of transmission and indication of relay system, may further comprise the steps: the base station sends indication information to terminal, and described indication information is used to indicate the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region; Described base station sends the dispatch of downlink data transmission to described terminal; Described base station sends downlink data to described terminal on the frequency band corresponding resource.
As shown in Figure 6, the flow chart for the method base station side of a kind of transmission of relay system and indication may further comprise the steps:
S101: the base station sends indication information to terminal, is used to indicate the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region.
As shown in Figure 7, be the schematic diagram of the transmission and the indication of relay system.Below in conjunction with Fig. 7 various embodiment are described.
In step S101, the base station sends indication information, and indication information comprises by S-PDCCH (Special Physical Downlink Shared Channel, special-purpose Physical Downlink Control Channel) or high-level signaling transmission to be realized.As shown in Figure 7, for example send S-PDCCH to terminal, indication is at the particular location of the band resource M of the special area of the descending backhaul transport of relaying, and the size of the symbolic number N of special area control channel transmission region.
Particularly, all R10 terminals need be notified in the base station, the terminal of LTE-A system just, the operating position of the band resource of the special area that is used for the descending backhaul transport of relaying of system configuration in the current subframe.
For example, in the base stations control information area, introduce a new control channel S-PDCCH, be used for notifying the particular location of band resource M of the special area that is used for the descending backhaul transport of relaying of the current subframe system configuration of all R10 terminals, and the size of the symbolic number N of special area control channel transmission region, and the size of the symbolic number N of special area control channel transmission region.
When the band resource of special area is continuous distribution, adopt the mode of the resource allocation type 2 of above-mentioned introduction to carry out the indication of resource, wherein the granularity of resource indication is by the demand decision of the middle reserved resource of special area.For example, under the condition of determining the reserved resource demand, select adequate resources indication granularity to carry out the resource indication according to reserved resource.
When the band resource of special area when being discontinuously arranged, adopt the resource allocation type 0 of above-mentioned introduction or the mode of resource allocation Class1 to carry out the indication of resource, wherein the granularity of resource indication is by the demand decision of the middle reserved resource of special area.
In addition, the size of special area control channel transmission region adopts the method indication of bit quantization.For example:, can adopt 2 bits to indicate so if the maximum of N is 4.Number of bits also can be relevant with the situation of N possibility value simultaneously, and for example: the value that N can get is 2 or 3, can adopt 1 bit to indicate so.
When S-PDCCH sends above-mentioned information, can define new Downlink Control Information DCI form, the information field of described DCI form comprises the band resource information of special area and the size of special area control channel transmission region, and with predefined R-RNTI (Radio Network TemporaryIdentifier, Radio Network Temporary Identifier) described DCI form is carried out scrambling, make all R10 terminals all obtain this information.
Perhaps, when S-PDCCH sends above-mentioned information, reuse the DCI form of existing format 1C, the resource block assignments information field of described DCI form comprises the band resource information of special area, the transport block size index information field of described DCI form comprises the size of special area control channel transmission region, and with predefined R-RNTI described DCI form is carried out scrambling.
For the R8 terminal, the terminal of LTE system just, this terminal is to cannot see newly-increased S-PDCCH.S-PDCCH can be put into the common search space of PDCCH, adopt a predefined RNTI (Radio Network Temporary Identifier, Radio Network Temporary Identifier) to carry out scrambling simultaneously, make all R10 terminals all obtain this information.
In addition, also available by adopting high-level signaling to notify all R10 terminals, the size of the band resource information of the special area that is used for the descending backhaul transport of relaying of system configuration and special area control channel transmission region in the current subframe.For example be by RRC (Radio Resource Control, RRM) signaling, the band resource information of the special area of utilization high-rise control semi-static indication of signaling or the descending backhaul transport of change relaying and the size of special area control channel transmission region.
The descending scheduling of downlink data transmission of signaling utilize S-PDSCH to carry out to(for) the R10 terminal is to indicate in PDCCH.
S102: the base station sends the dispatch of downlink data transmission to terminal.
In step S102, the base station sends the dispatch of downlink data transmission to terminal, by the information that obtains among dispatch and the step S101, the base station is according to described indication information and described dispatch, determine the right number b of brachymemma PRB that comprises among number a that the General Physics Resource Block PRB that comprises among the Physical Downlink Shared Channel PDSCH is right and the special-purpose Physical Downlink Shared Channel S-PDSCH, and calculate corresponding transmission block size TBS, in step S103, on the frequency band corresponding resource, send downlink data to terminal with the TBS that obtains.
For example, when base station specified data bag is carried by common PDSCH and/or S-PDSCH, judge that bearing mode adopts following any one mode that comprises:
A ≠ 0 and b=0, the expression packet is dispatched fully on common PDSCH and is transmitted;
A=0 and b ≠ 0, the expression packet is dispatched on S-PDSCH fully and is carried;
A ≠ 0 and b ≠ 0, the expression packet carries on common PDSCH and S-PDSCH simultaneously.
Owing to can resource be different from common PDSCH channel on the S-PDSCH, be the resource section after the brachymemma, i.e. the Physical Resource Block PRB of brachymemma is right, as shown in Figure 5, therefore, needs to determine the numerical value of transmission block size TBS of the special area of the descending backhaul transport of relaying.
Brachymemma PRB to the OFDM symbol that comprises is:
Determine the OFDM symbolic number T that comprises in the subframe to determine the OFDM symbolic number K that the base stations control information area comprises, determine the OFDM symbolic number N that the control information zone of the special area of the descending backhaul transport of relaying comprises;
So the OFDM symbolic number that the right transmission block of brachymemma PRB comprises is T-K-N.
For the ease of the compatibility of system, determine that usually the size of transmission block of the special area of the descending backhaul transport of relaying can also adopt in the conversion mode, brachymemma PRB to the PRB that is used to calculate TBS to being:
Calculate commutation factor β,
Or
Wherein, N ' is fixing average base stations control information area symbolic number, and K ' is for fixing the control information zone symbolic number of average special area.
The transmission block corresponding physical Resource Block PRB of the special area of the descending backhaul transport of relaying to size is
N ' wherein
PRBRepresent the right number of PRB that takies among the corresponding S-PDSCH.
For example, under the situation based on conventional CP, the OFDM symbolic number that comprises in subframe is 14, and the symbolic number that takies for R-PDSCH and S-PDSCH is 14-N-K so, is equivalent to PDSCH has been carried out intercept.In addition, consider the change-over time of sending/receiving formula, the length of aforesaid special area can be less than 14-K symbol.Can also adopt a fixing commutation factor to calculate: adopt a fixing commutation factor β to calculate, be similar in the LTE system this calculation method for DwPTS,
N ' wherein
PRBRepresent the right number of PRB that takies among the corresponding S-PDSCH.
With conventional CP is example, and wherein the calculating of β can be:
Perhaps also can be
Wherein N ' is equivalent to the control character length of a fixing average special area, i.e. fixing average 2 of the OFDM symbolic number of base stations control information area.
S103: the base station sends downlink data to terminal on the frequency band corresponding resource.
In step S103, the base station sends downlink data to terminal on the frequency band corresponding resource, and promptly packet is carried by common PDSCH and/or S-PDSCH.
The base station need select suitable TBS to carry out transfer of data.Calculating transmission block size TBS comprises:
When a ≠ 0 and b=0, the number that PRB is right is N
PRB=a passes through N
PRBValue is calculated corresponding TBS; When a=0 and b ≠ 0, the number that PRB is right is
Pass through N
PRBValue is calculated corresponding TBS; When a ≠ 0 and b ≠ 0, the number that PRB is right is
Pass through N
PRBValue is calculated corresponding TBS.
For example, in 3GPP TS36.213, defined the method that the TBS size is determined, specific as follows:
At first search index is to the TBS index by MCS (Modulation and Coding Scheme, modulation coding mode) according to the mapping relations of table 1, and wherein the index information of MCS is to notify terminal by the base station by dispatch.
Modulation and the TBS concordance list of table 1PDSCH
Then according to the TBS index that obtains, determine the size of TBS by table 2, only provided the right number of PRB here and be the form under 1～10 the situation, other situation is specifically seen the definition among the 3GPP TS36.213.
Table 2TBS table
Pass through above-mentioned steps, the base station has realized that the descending back haul link to relaying does not take all reserved resources and distributes and indicate, the problem of the utilization of the unoccupied resource in the descending back haul link resource of solution relaying makes full use of downlink resource and provides service for the user.
In order to realize the present invention's purpose, the present invention has also proposed a kind of method of transmission and indication of relay system on the other hand, may further comprise the steps: terminal receives the indication information that the base station sends, and described indication information is used to indicate the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region; Terminal receives the base station and sends PDCCH, obtains current self the resource indication of PDSCH transmission, judges that according to described resource indication current PDSCH transmits the band resource S-PDSCH of the special area that whether takies the descending backhaul transport of relaying; Described terminal receives corresponding PDSCH data.
As shown in Figure 8, the flow chart for the method base station side of a kind of transmission of relay system and indication may further comprise the steps:
S201: terminal receives the indication information that the base station sends, and is used to indicate the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region.
As shown in Figure 7, be the schematic diagram of the transmission and the indication of relay system.Below in conjunction with Fig. 7 various embodiment are described.
In step S201, terminal receives high-level signaling or the S-PDCCH that the base station sends, and obtains the information of band resource S-PDSCH of the special area of the descending backhaul transport of relaying, i.e. the position of frequency band M and and the big or small N of special area control channel transmission region.As shown in Figure 7, for example send S-PDCCH to terminal, indication is at the particular location of the band resource M of the special area of the descending backhaul transport of relaying, and the size of the symbolic number N of special area control channel transmission region.
For example, terminal receives the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region by special-purpose Physical Downlink Control Channel S-PDCCH, or obtains the band resource information of special area of semi-static indication or the descending backhaul transport of change relaying and the size of special area control channel transmission region by receiving high-rise control signaling.
Wherein, when the band resource of special area is continuous distribution, can adopt the mode of the resource allocation type 2 of above-mentioned introduction to carry out the indication of resource, wherein the granularity of resource indication is by the demand decision of the middle reserved resource of special area.For example, under the condition of determining the reserved resource demand, select adequate resources indication granularity to carry out the resource indication according to reserved resource.When the band resource of special area when being discontinuously arranged, can adopt the resource allocation type 0 of above-mentioned introduction or the mode of resource allocation Class1 to carry out the indication of resource, wherein the granularity of resource indication is by the demand decision of the middle reserved resource of special area.
In addition, the size of special area control channel transmission region adopts the method indication of bit quantization.For example:, can adopt 2 bits to indicate so if the maximum of N is 4.Number of bits also can be relevant with the situation of N possibility value simultaneously, and for example: the value that N can get is 2 or 3, can adopt 1 bit to indicate so.
Therefore, terminal can receive the Downlink Control Information DCI form of redetermination, the information field of described DCI form comprises the band resource information of special area and the size of special area control channel transmission region, and with predefined R-RNTI described DCI form is carried out the blind check reception.
In addition, terminal can also receive the DCI form of reusing existing format 1C, the resource block assignments information field of described DCI form comprises the band resource information of special area, the transport block size index information field of described DCI form comprises the size of special area control channel transmission region, and with predefined R-RNTI described DCI form is carried out the blind check reception.
S202: terminal receives the base station and sends PDCCH, judges whether current PDSCH transmission takies the available band resource of the special area of the descending backhaul transport of relaying.
In step S202, terminal receives the base station and sends PDCCH, obtains current self the resource indication of PDSCH transmission, judges that according to described resource indication current PDSCH transmits the available band resource S-PDSCH of the special area that whether takies the descending backhaul transport of relaying.For example, the R10 terminal is carried out blind check by the PDCCH channel that the base station is sent, know current oneself the resource indication of PDSCH transmission, judge according to the information in the resource indication whether current PDSCH transmission takies the band resource of the special area of the descending backhaul transport of relaying.
S203: terminal receives corresponding PDSCH data.
In step S203,, operate accordingly according to the judged result of step 202.
When described resource indication judges that current PDSCH transmits the available band resource information of the special area that takies the descending backhaul transport of relaying, described terminal receives R-PCFICH information, determine the position of the initial OFDM symbol of S-PDSCH, and the common PRB that comprises according to PDSCH to the brachymemma PRB that comprises with S-PDSCH to carrying out the detection of packet.
Terminal is indicated with resource according to the indication information that the base station sends, and determines the right number b of brachymemma PRB that comprises among number a that the common PRB that comprises among the Physical Downlink Shared Channel PDSCH is right and the special-purpose Physical Downlink Control Channel S-PDSCH.When a=0 and b ≠ 0, the expression packet is dispatched on S-PDSCH fully and is carried; When a ≠ 0 and b ≠ 0, the expression packet carries on common PDSCH and S-PDSCH simultaneously.
Data for the special area that receives the descending backhaul transport of relaying, the numerical value that terminal need obtain the transmission block size TBS of data could correctly detect and receive, therefore, it is right to the PRB that is used to calculate transmission block size TBS at first to need to calculate brachymemma PRB, specifically comprises:
Calculate commutation factor β,
Or
Wherein, N ' is fixing average base stations control information area symbolic number, K ' is for fixing the control information zone symbolic number of average special area, T is the OFDM symbolic number that comprises in the subframe, the OFDM symbolic number that K comprises for the base stations control information area, N is the OFDM symbolic number that the control information zone of the special area of the descending backhaul transport of relaying comprises;
The TBS corresponding physical Resource Block PRB of the special area of the descending backhaul transport of relaying to size is
N ' wherein
PRBThe right number of PRB that takies among the corresponding S-PDSCH that indicates in the resource indication information territory of expression dispatch.
Therefore, the PRB that takies according to common PDSCH and S-PDSCH comprises the detection that number carries out packet:
When a=0 and b ≠ 0, the number that PRB is right is
When a ≠ 0 and b ≠ 0, the number that PRB is right is
Pass through N
PRBValue is calculated corresponding TBS; Carry out the detection of packet according to corresponding TBS.
For example,, need so R-PCFICH is carried out blind check if the part of the band resource that takies special area is arranged among the current PDSCH, thus the initial OFDM character position of definite S-PDSCH.Simultaneously the PRB that takies according to the S-PDSCH of common PDSCH and brachymemma carries out the detection of packet to number.The calculating of concrete TBS is undertaken by the above-mentioned scheme of introducing.
If do not take the part of the band resource of special area in the transmission of the current PDSCH of indicating terminal, then terminal is carried out the detection of packet according to common PDSCH.That is, the resource indication judges that packet was dispatched on PDSCH fully and carried when current PDSCH transmitted the band resource information of the special area that does not take the descending backhaul transport of relaying, when the number that the common PRB that takies as PDSCH is right is a, and N
PRB=a; Pass through N
PRBValue is calculated corresponding TBS; Carry out the detection of packet according to corresponding TBS.
Via node also carries out the detection of data according to the method that the transmission block size of the R-PDSCH of brachymemma is determined, definite scheme of R-PDSCH transmission block size TBS is:
Calculate commutation factor β,
Or
Wherein, N ' is fixing average base stations control information area symbolic number, and K ' is for fixing the control information zone symbolic number of average special area;
The TBS corresponding physical Resource Block PRB of the special area of the descending backhaul transport of relaying to size is
N ' wherein
PRBRepresent the right number of PRB that takies among the corresponding S-PDSCH, according to N
1 PRBObtain corresponding TBS, thereby carry out follow-up Data Detection and reception.
As shown in Figure 9, the invention allows for a kind of base station 100, comprise sending module 110 and computing module 120.
A kind of base station is characterized in that, comprises sending module 110 and computing module 120,
Wherein, sending module 110 is used for to sending indication information, is used to indicate the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region, and sends the dispatch of downlink data transmission to terminal 300; Computing module 120 is used for according to indication information and dispatch, the right number b of brachymemma PRB that comprises among number a that the General Physics Resource Block PRB that comprises among the Computational Physics DSCH Downlink Shared Channel PDSCH is right and the special-purpose Physical Downlink Control Channel S-PDSCH, and calculate corresponding transmission block size TBS; Sending module 110 sends downlink data to terminal 300 according to the corresponding TBS that computing module 120 obtains on the frequency band corresponding resource.
Embodiment as the said equipment, indication information comprises sending module 110 by the band resource information of the special area of the descending backhaul transport of special-purpose Physical Downlink Control Channel S-PDCCH notice terminal 300 relayings and the size of special area control channel transmission region, or sending module 110 is by the band resource information of the special area of high-rise control semi-static indication of signaling or the descending backhaul transport of change relaying and the size of special area control channel transmission region.
Embodiment as the said equipment, the Downlink Control Information DCI form that sending module 110 definition are new also sends to terminal 300, the information field of DCI form comprises the band resource information of special area and the size of special area control channel transmission region, and with predefined R-RNTI the DCI form is carried out scrambling.
Embodiment as the said equipment, sending module 110 is reused the DCI form of existing format 1C and is sent to terminal 300, the resource block assignments information field of DCI form comprises the band resource information of special area, the transport block size index information field of DCI form comprises the size of special area control channel transmission region, and with predefined R-RNTI the DCI form is carried out scrambling.
As shown in Figure 9, the invention allows for a kind of terminal 300, comprise receiver module 310 and judge module 320.
Wherein, receiver module 310 is used to receive the indication information that base station 100 sends, indication information is used to indicate the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region, receive base station 100 and send PDCCH, obtain current self the resource indication of PDSCH transmission, indication judges whether current PDSCH transmission takies the band resource S-PDSCH of the special area of the descending backhaul transport of relaying according to resource, and is used to receive corresponding PDSCH data; Judge module 320 is used for indicating to judge whether current PDSCH transmission takies the available band resource S-PDSCH of the special area of the descending backhaul transport of relaying according to resource, and determines corresponding PDSCH data.
Embodiment as the said equipment, receiver module 310 receives the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region by special-purpose Physical Downlink Control Channel S-PDCCH, or obtains the band resource information of special area of semi-static indication or the descending backhaul transport of change relaying and the size of special area control channel transmission region by receiving high-rise control signaling.
Embodiment as the said equipment, receiver module 310 receives the Downlink Control Information DCI form of redetermination, the information field of DCI form comprises the band resource information of special area and the size of special area control channel transmission region, and with predefined R-RNTI the DCI form is carried out the blind check reception.
Embodiment as the said equipment, receiver module 310 receives the DCI form of reusing existing format 1C, the resource block assignments information field of DCI form comprises the band resource information of special area, the transport block size index information field of DCI form comprises the size of special area control channel transmission region, and with predefined R-RNTI the DCI form is carried out the blind check reception.
The technique scheme that the present invention proposes, not taking all reserved resources by the descending back haul link to relaying distributes and indicates, the problem of the utilization of the unoccupied resource in the descending back haul link resource of solution relaying makes full use of downlink resource and provides service for the user.The such scheme that the present invention proposes, very little to the change of existing system, can not influence the compatibility of system, and realize simple, efficient.
One of ordinary skill in the art will appreciate that and realize that all or part of step that the foregoing description method is carried is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises one of step or its combination of method embodiment when carrying out.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
The technique scheme that the present invention proposes, not taking all reserved resources by the descending back haul link to relaying distributes and indicates, the problem of the utilization of the unoccupied resource in the descending back haul link resource of solution relaying makes full use of downlink resource and provides service for the user.The such scheme that the present invention proposes, very little to the change of existing system, can not influence the compatibility of system, and realize simple, efficient.
One of ordinary skill in the art will appreciate that and realize that all or part of step that the foregoing description method is carried is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises one of step or its combination of method embodiment when carrying out.
In addition, each functional unit in each embodiment of the present invention can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (20)
1. the method for the transmission of a relay system and indication is characterized in that, may further comprise the steps:
The base station sends indication information to terminal, and described indication information is used to indicate the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region;
Described base station sends the dispatch of downlink data transmission to described terminal;
Described base station sends downlink data to described terminal on the frequency band corresponding resource.
2. the method for the transmission of relay system as claimed in claim 1 and indication is characterized in that, described indication information comprises by special-purpose Physical Downlink Control Channel S-PDCCH or the transmission of high-rise control signaling.
3. the method for the transmission of relay system as claimed in claim 2 and indication, it is characterized in that, described indication information comprises by special-purpose Physical Downlink Control Channel S-PDCCH notifies the band resource information of special area of the descending backhaul transport of described terminal relaying and the size of special area control channel transmission region, or the band resource information of the special area by high-rise control semi-static indication of signaling or the descending backhaul transport of change relaying and the size of special area control channel transmission region.
4. the method for the transmission of relay system as claimed in claim 1 and indication is characterized in that,
When the band resource of described special area is continuous distribution, adopt the mode of resource allocation type 2 to carry out the indication of resource, wherein the granularity of resource indication is by the demand decision of the middle reserved resource of special area;
When the band resource of described special area when being discontinuously arranged, adopt the mode of resource allocation type 0 or resource allocation Class1 to carry out the indication of resource, wherein the granularity of resource indication is by the demand decision of the middle reserved resource of special area;
The size of described special area control channel transmission region adopts the method indication of bit quantization.
5. the method for the transmission of relay system as claimed in claim 4 and indication, it is characterized in that, define new Downlink Control Information DCI form, the information field of described DCI form comprises the band resource information of special area and the size of special area control channel transmission region, and with predefined R-RNTI described DCI form is carried out scrambling.
6. the method for the transmission of relay system as claimed in claim 4 and indication, it is characterized in that, reuse the DCI form of existing format 1C, the resource block assignments information field of described DCI form comprises the band resource information of special area, the transport block size index information field of described DCI form comprises the size of special area control channel transmission region, and with predefined R-RNTI described DCI form is carried out scrambling.
7. the method for the transmission of a relay system and indication is characterized in that, may further comprise the steps:
Terminal receives the indication information that the base station sends, and described indication information is used to indicate the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region;
Terminal receives the base station and sends PDCCH, obtains current self the resource indication of PDSCH transmission, judges that according to described resource indication current PDSCH transmits the band resource S-PDSCH of the special area that whether takies the descending backhaul transport of relaying;
Described terminal receives corresponding PDSCH data.
8. the method for the transmission of relay system as claimed in claim 7 and indication is characterized in that, described terminal receives described indication information by special-purpose Physical Downlink Control Channel S-PDCCH or high-rise control signaling.
9. the method for the transmission of relay system as claimed in claim 8 and indication, it is characterized in that, described terminal receives the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region by special-purpose Physical Downlink Control Channel S-PDCCH, or obtains the band resource information of special area of semi-static indication or the descending backhaul transport of change relaying and the size of special area control channel transmission region by receiving high-rise control signaling.
10. the method for the transmission of relay system as claimed in claim 7 and indication is characterized in that,
When the band resource of described special area is continuous distribution, adopt the mode of resource allocation type 2 to carry out the indication of resource, wherein the granularity of resource indication is by the demand decision of the middle reserved resource of special area;
When the band resource of described special area when being discontinuously arranged, adopt the mode of resource allocation type 0 or resource allocation Class1 to carry out the indication of resource, wherein the granularity of resource indication is by the demand decision of the middle reserved resource of special area;
The size of described special area control channel transmission region adopts the method indication of bit quantization.
11. the transmission of relay system as claimed in claim 10 and the method for indication, it is characterized in that, described terminal receives the Downlink Control Information DCI form of redetermination, the information field of described DCI form comprises the band resource information of special area and the size of special area control channel transmission region, and with predefined R-RNTI described DCI form is carried out the blind check reception.
12. the transmission of relay system as claimed in claim 10 and the method for indication, it is characterized in that, described terminal receives the DCI form of reusing existing format 1C, the resource block assignments information field of described DCI form comprises the band resource information of special area, the transport block size index information field of described DCI form comprises the size of special area control channel transmission region, and with predefined R-RNTI described DCI form is carried out the blind check reception.
13. a base station is characterized in that, comprises sending module and computing module,
Described sending module is used for to sending indication information, is used to indicate the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region, and sends the dispatch of downlink data transmission to described terminal;
Described computing module is used for according to described indication information and described dispatch, the right number b of brachymemma PRB that comprises among number a that the General Physics Resource Block PRB that comprises among the Computational Physics DSCH Downlink Shared Channel PDSCH is right and the special-purpose Physical Downlink Control Channel S-PDSCH, and calculate corresponding transmission block size TBS;
Described sending module sends downlink data to described terminal according to the corresponding TBS that described computing module obtains on the frequency band corresponding resource.
14. base station as claimed in claim 13, it is characterized in that, described indication information comprises that described sending module notifies the band resource information of special area of the descending backhaul transport of described terminal relaying and the size of special area control channel transmission region by special-purpose Physical Downlink Control Channel S-PDCCH, or described sending module is by the band resource information of the special area of high-rise control semi-static indication of signaling or the descending backhaul transport of change relaying and the size of special area control channel transmission region.
15. base station as claimed in claim 14, it is characterized in that, the Downlink Control Information DCI form that described sending module definition is new also sends to described terminal, the information field of described DCI form comprises the band resource information of special area and the size of special area control channel transmission region, and with predefined R-RNTI described DCI form is carried out scrambling.
16. the transmission of relay system as claimed in claim 14 and the method for indication, it is characterized in that, described sending module is reused the DCI form of existing format 1C and is sent to described terminal, the resource block assignments information field of described DCI form comprises the band resource information of special area, the transport block size index information field of described DCI form comprises the size of special area control channel transmission region, and with predefined R-RNTI described DCI form is carried out scrambling.
17. a terminal is characterized in that, comprises receiver module and judge module,
Described receiver module is used to receive the indication information that the base station sends, described indication information is used to indicate the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region, receive the base station and send PDCCH, obtain current self the resource indication of PDSCH transmission, judge according to described resource indication whether current PDSCH transmission takies the band resource S-PDSCH of the special area of the descending backhaul transport of relaying, and be used to receive corresponding PDSCH data;
Described judge module is used for judging according to described resource indication whether current PDSCH transmission takies the available band resource S-PDSCH of the special area of the descending backhaul transport of relaying, and determines corresponding PDSCH data.
18. terminal as claimed in claim 17, it is characterized in that, described receiver module receives the band resource information of special area of the descending backhaul transport of relaying and the size of special area control channel transmission region by special-purpose Physical Downlink Control Channel S-PDCCH, or obtains the band resource information of special area of semi-static indication or the descending backhaul transport of change relaying and the size of special area control channel transmission region by receiving high-rise control signaling.
19. terminal as claimed in claim 18, it is characterized in that, described receiver module receives the Downlink Control Information DCI form of redetermination, the information field of described DCI form comprises the band resource information of special area and the size of special area control channel transmission region, and with predefined R-RNTI described DCI form is carried out the blind check reception.
20. terminal as claimed in claim 18, it is characterized in that, described receiver module receives the DCI form of reusing existing format 1C, the resource block assignments information field of described DCI form comprises the band resource information of special area, the transport block size index information field of described DCI form comprises the size of special area control channel transmission region, and with predefined R-RNTI described DCI form is carried out the blind check reception.
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