CN101909305B - Method and device for transmission and indication of relay system - Google Patents
Method and device for transmission and indication of relay system Download PDFInfo
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Abstract
The invention provides a method for transmission and indication of a relay system, comprising the following steps: a base station transmits indication information to a terminal for indicating frequency band resource information transmitted by relay downlink backhaul in a special region; the base station transmits a scheduling signaling transmitted by downlink data to the terminal; and the base station transmits the downlink data to the terminal on corresponding frequency band resources. In the technical scheme provided by the invention, through allocating and indicating a relay downlink backhaul linkage which does not occupy all reserved resources, a problem of utilizing unoccupied resources in downlink backhaul linkage resources of a relay is solved, and the downlink resources are fully adopted to provide service for a user.
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
Mobile and broadband becomes the developing direction of modern communication technology, 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 be on higher frequency range, for example the frequency more than 3GHz is sought.Frequency range is more high, and it is more fast that radio wave propagation is decayed, and transmission range is more short, 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-8UE, keep Relay UE with Macro UE identical frame structure to be arranged, 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, when namely RN sent data to the base station, Relay UE mourned in silence and does not namely transmit any upward signal; In the down mixing zone, when to be the base station to RN send data, the frame structure of Relay is configured to the MBSFN subframe, the descending control signaling zone that namely has 1 or 2 OFDM symbol, being used for Relay sends descending control signaling to the UE of its service (Relay can not receive and come from signal of base station this moment, 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, the repeated link data that the base station is transferred to Relay are that transmit the multiplexing data area of together passing through the MBSFN subframe with the control signaling.
At present the channel architecture of a kind of transmission of possible relay system and 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 at identical OFDM symbol.Be to be used for transmitting PDSCH at the later OFDM symbol of the OFDM of preceding several control areas symbol, 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, it is the R-PCFICH/R-PDCCH/R-PHICH part, with the data area be R-PDSCH (Relay-Physical Downlink Shared Channel, the relaying Physical Downlink Shared Channel) is time-multiplexed, wherein is designated the channel of communicating by letter with via node with R-for the ease of understanding.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.It is right that special area takies continuous or discrete M PRB at frequency domain, 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 corresponding technical 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 by the descending back haul link to relaying and distribute and indicate, solve the problem of the utilization of the unoccupied resource in the descending back haul link resource of 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, and may further comprise the steps: the base station sends indication information to terminal, is used to indicate the band resource information of the special area of the descending backhaul transport of relaying; Described base station sends the dispatch of downlink data transmission to described terminal; Described base station sends downlink data to described terminal at corresponding band resource.
The invention allows for a kind of method of transmission and indication of relay system, 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 the special area of the descending backhaul transport of relaying; Terminal receives the base station and sends 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 (Special PhysicalDownlink Shared Channel, special-purpose Physical Downlink Shared Channel) of the special area of the descending backhaul transport of relaying; Described terminal receives corresponding PDSCH data.
The invention allows for a kind of base station, comprise sending module and computing module,
Described sending module is used for being used to indicate the band resource information of the special area of the descending backhaul transport of relaying to sending indication information, 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 number b that the brachymemma PRB that comprises among the 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 is right, and calculate corresponding transmission block size TBS;
Described sending module sends downlink data to described terminal at corresponding band resource according to the corresponding TBS that described computing module obtains.
The invention allows for a kind of terminal, comprise receiver module and judge module,
Described receiver module is used for receiving the indication information that the base station sends, described indication information is used to indicate the band resource information of the special area of the descending backhaul transport of relaying, 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 for receiving 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 takes full advantage 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.
The 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 the 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 flow chart of the method base station side of a kind of transmission of relay system and indication;
Fig. 5 is the schematic diagram of transmission and the indication of relay system;
Fig. 6 is the flow chart of the method end side of a kind of transmission of relay system and indication;
Fig. 7 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 or similar label is represented identical or similar elements or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
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, is used to indicate the band resource information of the special area of the descending backhaul transport of relaying; Described base station sends the dispatch of downlink data transmission to described terminal; Described base station sends downlink data to described terminal at corresponding band resource.
As shown in Figure 4, 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 the special area of the descending backhaul transport of relaying.
As shown in Figure 5, be the schematic diagram of transmission and the indication of relay system.Below in conjunction with Fig. 5 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 5, 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.
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 control information zone, base station, 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.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 TemporaryIdentifier, 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 band resource of the special area that is used for the descending backhaul transport of relaying of system configuration in the current subframe.
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 corresponding band resource, send downlink data with the TBS that obtains to terminal.
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 at common PDSCH and is transmitted;
A=0 and b ≠ 0, the expression packet is dispatched at S-PDSCH fully and is carried;
A ≠ 0 and b ≠ 0, the expression packet carries at 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 control information zone, base station 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 for calculating TBS to being:
Calculate commutation factor β,
Or
Wherein, N ' is fixing average control information zone, base station symbolic number, and K ' is for fixing the control information zone symbolic number of average special area.
The size of transmission block corresponding physical Resource Block PRB of the special area of the descending backhaul transport of relaying 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.
Be example with conventional CP, 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 in base station control information zone.
S103: the base station sends downlink data to terminal at corresponding band resource.
In step S103, the base station sends downlink data to terminal at corresponding band resource, and namely 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 NP
RBValue 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 takes full advantage 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 the special area of the descending backhaul transport of relaying; 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 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:
S201: terminal receives the indication information that the base station sends, and is used to indicate the band resource information of the special area of the descending backhaul transport of relaying.
As shown in Figure 5, be the schematic diagram of transmission and the indication of relay system.Below in conjunction with Fig. 5 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, as shown in Figure 5.For example, the R10 terminal is known the band resource of the special area that is used for the descending backhaul transport of relaying of system configuration in the current subframe by the S-PDCCH channel is carried out blind check.
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, according to the judged result of step 202, operate accordingly.
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 at S-PDSCH fully and is carried; When a ≠ 0 and b ≠ 0, the expression packet carries at 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 for calculating transmission block size TBS at first to need to calculate brachymemma PRB, specifically comprises:
Calculate commutation factor β,
Or
Wherein, N ' is fixing average control information zone, base station 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, K is the OFDM symbolic number that control information zone, base station comprises, N is the OFDM symbolic number that the control information zone of the special area of the descending backhaul transport of relaying comprises;
The size of TBS corresponding physical Resource Block PRB of the special area of the descending backhaul transport of relaying 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 number of PRB that takies according to common PDSCH and the S-PDSCH detection of carrying out packet comprises:
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, if the part of the band resource that takies special area is arranged among the current PDSCH, need so R-PCFICH is carried out blind check, thus the initial OFDM character position of definite S-PDSCH.Simultaneously the number of PRB that takies according to the S-PDSCH of common PDSCH and brachymemma carries out the detection of packet.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 at 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 control information zone, base station symbolic number, and K ' is for fixing the control information zone symbolic number of average special area;
The size of TBS corresponding physical Resource Block PRB of the special area of the descending backhaul transport of relaying 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 7, the invention allows for a kind of base station 100, comprise sending module 110 and computing module 120.
Wherein, sending module 110 is used for being used to indicate the band resource information of the special area of the descending backhaul transport of relaying to sending indication information, and sends the dispatch of downlink data transmission to terminal; Computing module 120 is used for according to indication information and dispatch, the number b that the brachymemma PRB that comprises among the 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 is right, and calculate corresponding transmission block size TBS; Sending module 110 sends downlink data to terminal at corresponding band resource according to the corresponding TBS that computing module 120 obtains.
As the embodiment of above-mentioned base station 100, base station 100 also comprises scheduler module 130, and scheduler module 130 is used for the specified data bag is carried by common PDSCH and/or S-PDSCH, and bearing mode comprises following any one mode:
A ≠ 0 and b=0, the expression packet is dispatched fully at common PDSCH and is transmitted;
A=0 and b ≠ 0, the expression packet is dispatched at S-PDSCH fully and is carried; A ≠ 0 and b ≠ 0, the expression packet carries at common PDSCH and S-PDSCH simultaneously.As the embodiment of above-mentioned base station 100, computing module 120 calculate brachymemma PRB to the PRB that is used for calculating TBS to being:
The size of transmission block corresponding physical Resource Block PRB that computing module 120 calculates the special area of the descending backhaul transport of relaying is
N ' wherein
PRBRepresent the right number of PRB that takies among the corresponding S-PDSCH.
As the embodiment of above-mentioned base station 100, computing module 120 calculates transmission block size TBS and 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.
As shown in Figure 7, the invention allows for a kind of terminal 300, comprise receiver module 310 and judge module 320.
Wherein, receiver module 310 is used for receiving the indication information that the base station sends, indication information is used to indicate the band resource information of the special area of the descending backhaul transport of relaying, receive the base station 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 for receiving 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 above-mentioned terminal 300, when judge module 320 judges that current PDSCH transmits the available band resource information of the special area that takies the descending backhaul transport of relaying, receiver module 310 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.
Embodiment as above-mentioned terminal 300, judge module 320 also is used for according to indication information and resource indication, determine 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, judgment data bag bearing mode:
A=0 and b ≠ 0, the expression packet is dispatched at S-PDSCH fully and is carried;
A ≠ 0 and b ≠ 0, the expression packet carries at common PDSCH and S-PDSCH simultaneously.
As the embodiment of above-mentioned terminal 300, terminal 300 also comprises computing module 330, computing module 330 be used for calculating brachymemma PRB to the PRB that is used for calculating transmission block size TBS to being:
Calculate commutation factor β,
Or
Wherein, N ' is fixing average control information zone, base station 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, K is the OFDM symbolic number that control information zone, base station comprises, N is the OFDM symbolic number that the control information zone of the special area of the descending backhaul transport of relaying comprises;
The size of TBS corresponding physical Resource Block PRB of the special area of the descending backhaul transport of relaying 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.
As the embodiment of above-mentioned terminal 300, computing module 330 is used for calculating the value of corresponding TBS: 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;
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 takes full advantage 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 above-described embodiment 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 read-only memory, disk or CD etc.
The above only is 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 (14)
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, is used to indicate the band resource information of the special area of the descending backhaul transport of relaying;
Described base station sends the dispatch of downlink data transmission to described terminal;
Described base station sends downlink data to described terminal at corresponding band resource;
Wherein, described indication information comprises that by special-purpose Physical Downlink Control Channel S-PDCCH or high-level signaling transmission, described base station sends downlink data to described terminal at corresponding band resource and comprises following steps:
Described 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;
Described base station sends downlink data with described TBS to described terminal on corresponding band resource;
And described base station specified data bag is carried by common PDSCH and/or S-PDSCH, and bearing mode comprises following any one mode:
A ≠ 0 and b=0, the expression packet is dispatched fully at common PDSCH and is transmitted;
A=0 and b ≠ 0, the expression packet is dispatched at S-PDSCH fully and is carried;
A ≠ 0 and b ≠ 0, the expression packet carries at common PDSCH and S-PDSCH simultaneously.
2. the method for the transmission of relay system as claimed in claim 1 and indication is characterized in that, described 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 control information zone, base station comprises, determine the OFDM symbolic number N that the control information zone of the special area of the descending backhaul transport of relaying comprises;
The OFDM symbolic number that the right transmission block of described brachymemma PRB comprises is T-K-N.
3. the method for the transmission of relay system as claimed in claim 2 and indication is characterized in that, described brachymemma PRB to the PRB that be used for to calculate TBS to being:
Calculate commutation factor β,
Or
Wherein, N ' is fixing average control information zone, base station symbolic number, and K ' is for fixing the control information zone symbolic number of average special area;
The size of TBS corresponding physical Resource Block PRB of the special area of the descending backhaul transport of relaying 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.
4. the method for the transmission of relay system as claimed in claim 3 and indication is characterized in that, calculates transmission block size TBS and 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.
5. 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 the special area of the descending backhaul transport of relaying;
Terminal receives the physical downlink control channel PDCCH that the base station sends, obtain current self the resource indication of Physical Downlink Shared Channel PDSCH transmission, judge according to described resource indication whether current PDSCH transmission takies the band resource special use Physical Downlink Shared Channel S-PDSCH of the special area of the descending backhaul transport of relaying;
Described terminal receives corresponding PDSCH data; Wherein, when judging that according to described resource indication current PDSCH transmits the band resource information of the special area that takies the descending backhaul transport of relaying, described terminal receives relaying Physical Control Format Indicator Channel 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;
And terminal is according to the indication of described indication information and described resource, 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;
A=0 and b ≠ 0, the expression packet is dispatched at S-PDSCH fully and is carried, a ≠ 0 and b ≠ 0, the expression packet carries at common PDSCH and S-PDSCH simultaneously.
6. the method for the transmission of relay system as claimed in claim 5 and indication is characterized in that, described brachymemma PRB to the PRB that be used for to calculate transmission block size TBS to being:
Calculate commutation factor β,
Or
Wherein, N ' is fixing average control information zone, base station 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, K is the OFDM symbolic number that control information zone, base station comprises, N is the OFDM symbolic number that the control information zone of the special area of the descending backhaul transport of relaying comprises;
The size of TBS corresponding physical Resource Block PRB of the special area of the descending backhaul transport of relaying 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.
7. the method for the transmission of relay system as claimed in claim 6 and indication is characterized in that, the detection that the number of PRB that takies according to common PDSCH and S-PDSCH carries out packet comprises:
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.
8. the method for the transmission of relay system as claimed in claim 5 and indication, it is characterized in that, when judging that according to described resource indication current PDSCH transmits the band resource information of the special area that does not take the descending backhaul transport of relaying, packet is dispatched at PDSCH fully and is carried, when the number that the common PRB that takies as PDSCH is right is a, N
PRB=a, a ≠ 0 and b=0, wherein, N
PRBBe the right number of PRB;
Pass through N
PRBValue is calculated corresponding TBS;
Carry out the detection of packet according to corresponding TBS.
9. a base station is characterized in that, comprises sending module and computing module,
Described sending module is used for sending indication information to terminal, is used to indicate the band resource information of the special area of the descending backhaul transport of relaying, and sends the dispatch of downlink data transmission to terminal;
Described computing module is used for according to described indication information and described dispatch, the number b that the brachymemma PRB that comprises among the 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 is right, and calculate corresponding transmission block size TBS;
Described sending module sends downlink data to described terminal at corresponding band resource according to the corresponding TBS that described computing module obtains;
Wherein, described base station also comprises scheduler module, and described scheduler module is used for the specified data bag is carried by common PDSCH and/or S-PDSCH, and bearing mode comprises following any one mode:
A ≠ 0 and b=0, the expression packet is dispatched fully at common PDSCH and is transmitted;
A=0 and b ≠ 0, the expression packet is dispatched at S-PDSCH fully and is carried;
A ≠ 0 and b ≠ 0, the expression packet carries at common PDSCH and S-PDSCH simultaneously.
10. base station as claimed in claim 9 is characterized in that, described computing module calculate described brachymemma PRB to the PRB that be used for to calculate TBS to being:
Described computing module calculates commutation factor β,
Or
Wherein, N ' is fixing average control information zone, base station 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, K is the OFDM symbolic number that control information zone, base station comprises, N is the OFDM symbolic number that the control information zone of the special area of the descending backhaul transport of relaying comprises;
The size of transmission block corresponding physical Resource Block PRB that described computing module calculates the special area of the descending backhaul transport of relaying is
N ' wherein
PRBRepresent the right number of PRB that takies among the corresponding S-PDSCH.
11. base station as claimed in claim 10 is characterized in that, described computing module calculates transmission block size TBS and 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.
12. a terminal is characterized in that, comprises receiver module and judge module,
Described receiver module is used for receiving the indication information that the base station sends, described indication information is used to indicate the band resource information of the special area of the descending backhaul transport of relaying, receive the physical downlink control channel PDCCH that the base station sends, obtain current self the resource indication of Physical Downlink Shared Channel PDSCH transmission, judge according to described resource indication whether current PDSCH transmission takies the special-purpose Physical Downlink Shared Channel S-PDSCH of band resource of the special area of the descending backhaul transport of relaying, and be used for receiving 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;
Wherein, when described judge module judges that current PDSCH transmits the available band resource information of the special area that takies the descending backhaul transport of relaying, described receiver module receives relaying Physical Control Format Indicator Channel 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;
And, described judge module also is used for according to described indication information and the indication of described resource, determine 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, judgment data bag bearing mode:
A=0 and b ≠ 0, the expression packet is dispatched at S-PDSCH fully and is carried;
A ≠ 0 and b ≠ 0, the expression packet carries at common PDSCH and S-PDSCH simultaneously.
13. terminal as claimed in claim 12 is characterized in that, described terminal also comprises computing module, described computing module be used for to calculate described brachymemma PRB to the PRB that is used for calculating transmission block size TBS to being:
Calculate commutation factor β,
Or
Wherein, N ' is fixing average control information zone, base station 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, K is the OFDM symbolic number that control information zone, base station comprises, N is the OFDM symbolic number that the control information zone of the special area of the descending backhaul transport of relaying comprises;
The size of TBS corresponding physical Resource Block PRB of the special area of the descending backhaul transport of relaying 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.
14. terminal as claimed in claim 13 is characterized in that, described computing module is used for calculating the value of corresponding TBS:
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;
Described receiver module carries out detection and the reception of PDSCH and S-PDSCH packet according to corresponding TBS.
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| US8873489B2 (en) * | 2011-05-05 | 2014-10-28 | Mediatek Inc. | Signaling methods for UE-specific dynamic downlink scheduler in OFDMA systems |
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