CN102448053B - Back haul link performs method and the via node of multiple MAC PDU transmission - Google Patents
Back haul link performs method and the via node of multiple MAC PDU transmission Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
- H04L1/0038—Blind format detection
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
- H04L1/0017—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy where the mode-switching is based on Quality of Service requirement
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5038—Address allocation for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L2001/0092—Error control systems characterised by the topology of the transmission link
- H04L2001/0097—Relays
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/26—Network addressing or numbering for mobility support
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
Abstract
According to the present invention, propose a kind of method back haul link in the wireless communication system with via node between donor base station and via node performing multiple medium access control layer protocol data cell (MAC PDU) and transmit, comprise: via node startup stage, be that via node distributes multiple Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) for there are multiple service flow that different service quality (QoS) requires by donor base station; Multiple medium education (MAC) entity identified by described multiple C-RNTI is configured in via node; And utilize multiple MAC entity of configuring, described back haul link performs multiple MAC PDU transmittance process with donor base station for the grouped data of described multiple service flow in a Transmission Time Interval.
Description
Technical field
The present invention relates to and a kind of back haul link in the wireless communication system with via node between donor base station and via node performs the method and corresponding via node that multiple MAC PDU (medium access control layer protocol data cell) transmits, by configuring multiple MAC (medium education) entity on via node, for dissimilar service provides better QoS (service quality) to ensure.
Background technology
3GPP (third generation Partnership Program) LTE (Long Term Evolution) system for having the efficient packet data transmission of many service supports, such as VoIP (voice based on Internet Protocol), HTTP (HTML (Hypertext Markup Language)) and Video service.These services have different demands for services, and these demands for services are obtained according to QCI (QoS classification logotype symbol) by 3GPP TS23.203.Service characteristic is indicated by resource type (the unwarranted bit rate Non-GBR of the bit rate GBR/ ensured), priority, packetization delay budget (PDB) and packet error Loss Rate (PELR).Such as, call voice service needs the packetization delay budget reaching 100ms, and can tolerate the comparatively high packet loss reaching 1%, and Video service (buffer stream) demand fulfillment reaches the grouped data budget and 10 of 300ms
-6the requirement of packet loss.In order to realize these qos requirements, different measures should be adopted to realize the carrying Access Network of lower floor, such as, configuration schedules and link layer functionality.
The Rel-10 (version 10) of LTE-Advanced (LTE evolution) have employed Class1 relaying as the effective scheme strengthened for the area of coverage expansion and throughput with low fixed capital expenditure (CAPEX) and operation expenditure (OPEX).
As shown in Figure 1, the network element (i.e. via node RN) of new introducing is communicated with DeNB (donor base station) as UE (mobile terminal) by Un interface, but by Uu interface as eNB (base station) for UE provides service.Communication link between DeNB and RN is back haul link, and the communication link between RN and UE is access link.
In order to avoid the self-interference problem that synchronous signal launching and receiving brings, time division multiplexing (TDM) is adopted to isolate back haul link and access link, wherein adopt subframe #2, #6 and #8 to carry out backhaul link transmission, and other subframes are used for access link transmission, as illustrated for example in figure 1.As a result, compared with the scene of single-hop, in Un interface, only can obtain less transmission opportunity.
Current, between the UE function and DeNB of RN, only there is single MAC entity to carry out data transmission.Configure according to single MAC entity, utilize identical QoS to arrange to encapsulate and transmit all VoIP data and TCP (transmission control protocol) data.These groupings with different QoS requirement experienced by identical packet loss and HARQ retransmission delay.For VoIP service, less re-transmission and relatively high packet loss are tolerable, while maximum retransmit and more low packet loss ratio be also acceptable.This will cause relay communications system very poor efficiency, if thus further do not improved on Un interface for HARQ, then by the Radio Resource in waste community.
Therefore, need to propose a kind of method realizing the grouped data transmission that QoS is ensured on Un interface for dissimilar service.
Summary of the invention
Consider that the above-mentioned defect of prior art proposes the present invention.Therefore, the object of the invention is a kind of back haul link in the wireless communication system with via node between donor base station and via node of proposition to perform the method for multiple MAC PDU transmission and corresponding via node, by configuring multiple MAC entity on via node, for dissimilar service provides better QoS to ensure.
To achieve these goals, according to the present invention, propose a kind of method back haul link in the wireless communication system with via node between donor base station and via node performing multiple medium access control layer protocol data cell MAC PDU transmission, comprise: via node startup stage, be that via node distributes multiple Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI for multiple service flow with different service quality qos requirement by donor base station; The multiple media access control MAC entities identified by described multiple C-RNTI are configured in via node; And utilize multiple MAC entity of configuring, described back haul link performs multiple MAC PDU with donor base station for the grouped data of described multiple service flow and transmits.
Preferably, described multiple service flow for having different QoS requirement are comprised by the step of donor base station multiple C-RNTI for via node distributes: the quantity dynamically being determined distributed C-RNTI by donor base station according to channel conditions, load state and carrying number of users.
Preferably, described channel conditions comprise measured Signal to Interference plus Noise Ratio SINR and from via node power headroom report at least one.
Preferably, described multiple service flow for having different QoS requirement are comprised by the step of donor base station multiple C-RNTI for via node distributes: when the quantity of distributed C-RNTI cannot meet the qos requirement of described multiple service flow, initiate redistributing described C-RNTI by donor base station or via node.
Preferably, described be after via node distributes the step of multiple C-RNTI for having multiple service flow that different QoS requires by donor base station, also comprise: according to the qos requirement of each service flow in multiple service flow, configure and manage the mapping relations of described service flow to logic channel and described multiple C-RNTI.
Preferably, described configuration manage described service flow and comprise to the step of the mapping relations of logic channel and described multiple C-RNTI: for the up link between donor base station and via node and down link, configure independently and manage described mapping relations.
Preferably, multiple MAC entity that described utilization configures perform for the grouped data of described multiple service flow the step that multiple MAC PDU transmits with donor base station and comprise on described back haul link: multiple relaying-Physical Downlink Control Channel R-PDCCH is sent to via node by donor base station, described R-PDCCH indexed resource block assignment information, modulation and encoding scheme and the cyclic redundancy check (CRC) by corresponding C-RNTI scrambling; Via node utilizes the main C-RNTI distributed, and performs blind decoding to described R-PDCCH, and described main C-RNTI is for described donor base station and all known specific C-RNTI of via node; And when finding the R-PDCCH mated with main C-RNTI, via node is for the secondary C-RNTI occurred in described subframe, utilize and the offset information of PDCCH in its search volume of carrying main C-RNTI, blind decoding is carried out in the same offset position in the R-PDCCH search volume may carrying time C-RNTI.
Preferably, multiple MAC entity that described utilization configures perform for the grouped data of described multiple service flow the step that multiple MAC PDU transmits with donor base station and comprise on described back haul link: multiple R-PDCCH is sent to via node by donor base station, described R-PDCCH indexed resource block assignment information, modulation and encoding scheme and the cyclic redundancy check (CRC) by corresponding C-RNTI scrambling; Via node utilizes the main C-RNTI distributed, and performs blind decoding to described R-PDCCH, and described main C-RNTI is for described donor base station and all known specific C-RNTI of via node; And when finding the R-PDCCH mated with main C-RNTI, based on the embedding information in the down link control information DCI of described R-PDCCH, determine the secondary C-RNTI of the scheduling of described subframe, again search for R-PDCCH for determined C-RNTI and decode.
Preferably, multiple MAC entity that described utilization configures perform for the grouped data of described multiple service flow the step that multiple MAC PDU transmits with donor base station and comprise on described back haul link: in the DL HARQ HARQ process on the Un interface of described back haul link, make each subframe support multiple HARQ procedure, and each HARQ procedure carry out explicit instruction by corresponding relaying-Physical Downlink Control Channel R-PDCCH.
Preferably, described wireless communication system is multihop relay system.
According to the present invention, also proposed the via node a kind of back haul link in a wireless communication system between donor base station and via node performing multiple medium access control layer protocol data cell MACPDU transmission, comprise: inking device, via node startup stage, for multiple service flow with different service quality qos requirement, according to being multiple Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI that via node distributes by donor base station, in via node, configure the multiple media access control MAC entities identified by described multiple C-RNTI; And transfer device, utilize multiple MAC entity of configuring, described back haul link performs multiple MAC PDU with donor base station for the grouped data of described multiple service flow and transmits.
Accompanying drawing explanation
By reference to below in conjunction with accompanying drawing to adopted detailed description of preferred embodiment, above-mentioned purpose of the present invention, advantage and feature will become apparent, wherein:
Fig. 1 shows the architecture of E-UTRAN (universal land radio access web of evolution) and the schematic diagram of frame structure with LTE-Advanced via node;
Fig. 2 shows the flow chart performing the method that multiple MAC PDU transmits according to the present invention on back haul link;
Fig. 3 shows the schematic diagram of the mapping of service flow on Un interface;
Fig. 4 shows the sequential chart of RN start-up course;
Fig. 5 shows the C-RNTI that RN initiates and redistributes/the sequential chart of dispose procedure;
Fig. 6 shows the schematic diagram of recessive auxiliary blind decoding;
Fig. 7 shows the schematic diagram of the timing of the downlink HARQ process on Un interface; And
Fig. 8 shows the block diagram according to via node of the present invention.
Embodiment
Due to the interface that Un interface is the new definition in LTE-Advanced system, the most direct method inherits the feature of Uu interface completely, and this is intactly designed in LTE Rel-8 version technique specification.When being used in the single MAC entity of the tradition that Uu interface defines and configuring, some defects can be there are in the Un interface of LTE-Advanced Rel-10 (version 10).
Compared with Uu interface, Un interface carries more business stream, have accumulated the business load of multiple UE of relay station management due to it.When there is transmission error on Un interface, HARQ retransmits the new data transmission that can stop subsequently, is thus degrading the throughput of DL (down link) and UL (up link), can causes more transmission delay.
Single MAC entity means if do not adopt spatial reuse or carrier aggregation technology, only transmits a Medium Access Control (MAC) Protocol Data Unit (MAC PDU) in a Transmission Time Interval (TTI).Namely, multiple service flow (such as, VoIP with HTTP service) with different QoS requirement must be encapsulated into the single MAC PDU be associated with identical link configuration parameters set.Single link configuration means to be protected equally to all these services, and this may violate the original intent of qos parameter design.
The impact making above-mentioned QoS problem cause further is become even more serious by the less transmission opportunity on back haul link.
Only relate to due to Un interface DeNB and RN that arranged by operator and can not produce any impact to Rel-8 UE, the backwards capability of traditional UE is easy to be ensured relatively.Therefore, the mechanism needing demand new and process solve foregoing problems.
Describe the preferred embodiments of the present invention in detail below with reference to the accompanying drawings.
The present invention proposes a kind of method realizing multiple MAC PDU and transmit on Un interface, that is, realize for RN, RN utilizes multiple MAC entity to communicate with DeNB on Un interface.
MAC entity is indicated by Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI), multiple MAC PDU transmit mean when its on Un interface as UE (that is, strengthening UE) feature operation time, multiple C-RNTI will be distributed for RN.
Fig. 2 shows the flow chart performing the method that multiple MAC PDU transmits according to the present invention on back haul link.
As shown in Figure 2, in step 201, RN startup stage, be that RN distributes multiple C-RNTI for multiple service flow with different service quality qos requirement by donor base station.Then, in step 203, in RN, configure the multiple MAC entity identified by described multiple C-RNTI.Finally, in step 205, utilize multiple MAC entity of configuring, described back haul link performs multiple MAC PDU with DeNB for the grouped data of described multiple service flow and transmits.
Here, RN startup stage, RN and DeNB to need distribute C-RNTI (mark of MAC entity) number hold consultation.
The startup stage that MAC entity configuration can being initiated as RN, wherein its identity is indicated to DeNB by RN, and this DeNB can provide default configuration according to layout scene and disturbed condition.
When the quantity (quantity of MAC entity) of distributed C-RNTI cannot meet the qos requirement of the plurality of service flow, such as, when there is a large amount of packet error or loss and/or packetization delay, redistributing (reconfiguring of MAC entity) C-RNTI can be initiated by DeNB or RN, particularly, to the assigning process of secondary C-RNTI, also will be described in detail secondary C-RNTI after a while.
Here, RN implicitly or is having to explicitly distributed, to use the set of RN C-RNTI, will be described in detail this after a while.
Fig. 3 shows the schematic diagram of the mapping of service flow on Un interface.
DeNB needs the New function element of definition for configuring the mapping relations flowing to logic channel and/or C-RNTI with management service.This function element can with packet scheduler collaborative work.In addition, these relations can be decided by the qos requirement of each service flow, such as, and COS (fixed bit rate GBR/ on-fixed bit rate non-GBR), PDB and PELR etc.
As shown in Figure 3, a service flow can be mapped to multiple logic channel, the plurality of logic channel can belong to one or more than one C-RNTI.
In DeNB and RN, there is the functional module of these mapping relations of maintenance and management.
For the possible different qos requirement of DL with UL, separately configure these mapping relations for DL and UL.
The scene that the scheduler being positioned at DeNB place can configure with the single C-RNTI for RN is identical (such as, keeping and scheduling queue Sum fanction identical in the past).Only difference is that scheduler may need to determine produce how many transmission blocks and Modulation and Coding Scheme, number of retransmissions etc. with aforementioned function element co-operation.
In addition, multiple R-PDCCH (relaying-Physical Downlink Control Channel) is sent to RN, with indexed resource block assignment information, modulation and encoding scheme and the cyclic redundancy check (CRC) by corresponding RN C-RNTI scrambling by DeNB.
RN realizes the blind decoding to R-PDCCH, and to obtain the schedule information about MAC PDU, detailed process can be that the following mode concentrated still is not limited thereto.
-RN utilizes all possible distribution C-RNTI to perform exhaustive-search.
-recessive information can correspond to specific subframe and previous errors transmission, thus can search for the subset of distributed C-RNTI.
-PDCCH hierarchical search mechanism can be adopted.Can first find main C-RNTI.It can correspond to specific subframe, then, in the R-PDCCH using main C-RNTI, obtains the quantity of the C-RNTI adopted or employ which C-RNTI in this TTI.
Above-mentioned blind decoding method may be used for the Resourse Distribute of down link and up link.
Because business have accumulated the business load of multiple UE on Un interface, the compromise between transmission reliability and R-PDCCH decoding complex degree can be considered.The C-RNTI of lesser amt means carry more UE on Un interface.If there is transmission error on Un interface, then retransmitting introduced delay by HARQ/ARQ will affect more users, and this corresponds to the low decoding complexity of the R-PDCCH for the relatively blind decoding trial of smallest number.On the contrary, the C-RNTI of larger amt corresponds to the impact of less UE and relatively large R-PDCCH decoding complex degree.Therefore, need to adopt some measures solve or alleviate foregoing problems.
, the management to the MAC entity of the RN on Un interface will be discussed below, and by discussing the method (dominant or recessive) of embedding information, to reduce R-PDCCH blind decoding complexity.In addition, will discuss for the possible message format that C-RNTI distributes and service flow maps.
Management for MAC entity relates to the different operating stage of RN.
Fig. 4 shows the sequential chart of RN start-up course.
At RN initial access phase, when via node powers up, this via node needs first to obtain Un interface channel and system configuration parameter.Next, this via node must be connected to DeNB, and must identify by core net and certification, to serve as via node.Finally, DeNB, after via node is certified, provides correct system configuration parameter to start operation to via node.Namely, RN must indicate it to be different from the identity of conventional UE, and step (1) in the diagram, (3) or (5) can occur in such instruction.
In RN start-up course, DeNB assesses channel conditions, and such as, measured SINR, power headroom report etc. from RN, DeNB dynamically determines the number that should configure C-RNTI at first according to channel conditions, load state and carrying number of users.In step (8), that is, RRC configuring request, may need to add some information units, to indicate multiple MAC entity to configure, comprise distributed C-RNTI and other parameters.
Fig. 5 shows the C-RNTI that RN initiates and redistributes/the sequential chart of dispose procedure.
In RN normal operation phase, when RN provides service as eNB to UE, and the configuration quantity of C-RNTI can not meet transmission demand on Un interface (such as, sizable packet error Loss Rate and/or packetization delay) time, redistributing (reconfiguring of MAC entity) C-RNTI should be initiated.This operation can be initiated by DeNB or RN.Fig. 5 illustrate only the process that RN initiates.
To discuss below on Un interface from radio bearer (RB) to the mapping of logic channel and C-RNTI.
On Uu interface, the mapping between RB and logic channel is unique, and when introducing multiple C-RNTI on Un interface, RB is the situation of one-to-many to the mapping of logic channel and C-RNTI.For the RB there is strict delay requiring, need more logic channels and C-RNTI to distribute to RN, thus the problem of alleviation head of line blocking.
Next, by discuss for reducing the complexity of R-PDCCH blind decoding linear/recessive embedding information.
R-PDCCH carries the message being known as down link control information (DCI), comprises the Resourse Distribute for RN and other control informations.Usually, multiple R-PDCCH can be transmitted in subframe.In order to identify, which R-PDCCH is used for this RN, utilize RN C-RNTI to carry out scrambling to CRC.RN will check the set of R-PDCCH, and attempts carrying out blind decoding (checking all DCI format) to it.Because this RN will perform repeatedly tentative decoding in its search volume, reach 22 times according to current specification, and when introducing multiple C-RNTI, corresponding processing load also will increase.
the recessive information of auxiliary PDCCH/R-PDCCH blind decoding
Because exhaustive R-PDCCH search is attempted being directly proportional to the quantity that C-RNTI configures, in order to avoid too much trial solution code operations, implicitly can define some rules in advance, and thus reduce the signaling consumption on Un interface.A kind of possible mode is following but be not limited thereto.
Need pre-defined main C-RNTI, it can be that specify statically or corresponding with subframe numbers and/or previous HARQ state specific C-RNTI.In any case DeNB with RN all unanimously should identify this C-RNTI.
RN utilizes main C-RNTI to perform R-PDCCH blind decoding completely as conventional UE.
When finding the R-PDCCH do not mated with main C-RNTI, this means there is no schedule information in the burst.And when RN searches corresponding R-PDCCH, such as, at the #2 (here, assuming that C-RNTI 1 is as main C-RNTI) of C-RNTI 1 (main C-RNTI) search volume of search volume, as shown in Figure 6.If there are other C-RNTI that can be called as time C-RNTI in the burst, then can have the skew identical with main C-RNTI, such as, the #2 of C-RNTI 2 (secondary C-RNTI) search volume.
RN only utilizes the skew identical with main C-RNTI to search for local R-PDCCH, to determine whether there is how additional schedule information.Therefore, exhaustive-search is non-essential, and significantly reduces complexity.
the dominant information of auxiliary PDCCH/R-PDCCH blind decoding
Because exhaustive R-PDCCH search is attempted being directly proportional to the quantity that C-RNTI configures, in order to reduce decoding complex degree, namely search for trial, the DCI some new information item being added to R-PDCCH may be needed, to indicate, which C-RNTI in this subframe is used for DL scheduling and UL scheduling authorization.In order to realize this function, following operation can be performed:
Need pre-defined main C-RNTI, that it can be specified statically or corresponding with subframe numbers and/or previous HARQ state specific C-RNTI.In any case DeNB and RN all should as one man know this C-RNTI.
RN utilizes main C-RNTI to perform R-PDCCH blind decoding completely as conventional UE.
When finding the R-PDCCH do not mated with main C-RNTI, this means do not have DL to dispatch and UL scheduling authorization in the burst.And when finding corresponding R-PDCCH, based on the embedding information in DCI, such as, to the index of other C-RNTI, RN can know which other C-RNTI (can be called as time C-RNTI) for the scheduling in this subframe.
For these C-RNTI, can additional R-PDCCH be searched for according to the identical process of main C-RNTI and decode.
It must be noted that, recessive information and the dominant information of auxiliary R-PDCCH blind decoding can work independently or in combination.
Fig. 7 shows the schematic diagram of the timing of the uplink HARQ process on Un interface.
As shown in Figure 7, on Un interface, each subframe can support multiple DL HARQ procedure.Such as, in the subframe #2 of radio frames #n, as P2HARQ process, the R-PDCCH with up link license is sent to RN by DeNB.In ensuing 4th subframe and subframe #6, UL data are sent to DeNB by RN.Then, eNB utilizes the UL license with new data instruction (NDI) bit do not switched, and retransmits for carrying out self adaptation UL HARQ in the subframe #2 of ensuing frame #n+1.As shown in Figure 7, in described UL HARQ procedure, make each backhaul subframe corresponding with multiple HARQ process, each HARQ procedure carrys out explicit instruction by corresponding R-PDCCH.Such as, the HARQ of P2 retransmits the interference that can not be subject to the normal new data transmission of the P5 of subframe #2.Note, the maximum quantity of the HARQ process supported in subframe is dynamic or partly dynamically, this is corresponding with the C-RNTI number distributed.Solve the above-mentioned problem stopping subsequent data packet due to re-transmission.Here, different Modulation and Coding Scheme can be applied to each transmission block in subframe.
Fig. 8 shows the block diagram according to via node of the present invention.
As shown in Figure 8, via node according to the present invention comprises: inking device 801 and transfer device 803.Inking device 801 via node startup stage, for multiple service flow with different service quality qos requirement, according to being multiple Cell Radio Network Temporary Identifier/Identity, Cell-RNTIs (C-RNTI) that via node distributes by donor base station, in via node, configure the multiple media access control MAC entities identified by described multiple C-RNTI.Transfer device 803 utilizes the multiple MAC entity configured, and described back haul link performs multiple MAC PDU with donor base station for the grouped data of described multiple service flow and transmits.
Multi-hop relay technology is extended coverage area and strengthens user throughput (particularly to cell edge user) mode effective and with low cost, and is the crucial candidate technologies in LTE-Advanced.The solution of the present invention can ensure for better QoS the performance improving packet error Loss Rate, and there is very little amendment to Current specifications.The solution of the present invention has good scalability, and it easily can expand to the relay scene more than double bounce.
The present invention can by overcoming the present situation lacking inconsistent link configuration on Un interface, realize retransmission operation and delay and for Differentiated Services PELR between compromise.
The present invention can optimize QoS and control and R-PDCCH decoding complex degree in the scope of RAN, and can not have an impact to core net.
The single MAC PDU that the present invention easily can return to Un interface transmits, and thus ensure that its robustness.
In the present invention, the size of transmission block reduces reduce transmission block error probability and add overall system throughput.
In the present invention, reduce transport block size and reduce transmission block error probability, and then the average transfer delay of the packet reduced.
Method of the present invention additionally provides the additional flexibility ratio meeting the qos requirement after achieving Access Network introducing via node.
Method of the present invention maintains the compatibility with Current standard specifications and latest development.The present invention proposes a kind of new departure for guaranteeing relay system QoS of survice performance, and meet backwards compatibility, that is, can not have an impact to the normal running of Rel-8/9/10UE.
Although below show the present invention in conjunction with the preferred embodiments of the present invention, one skilled in the art will appreciate that without departing from the spirit and scope of the present invention, various amendment, replacement and change can be carried out to the present invention.Therefore, the present invention should not limited by above-described embodiment, and should be limited by claims and equivalent thereof.
Claims (11)
1. the back haul link in the wireless communication system with via node between donor base station and via node performs the method that multiple medium access control layer protocol data cell MACPDU transmits, comprising:
Via node startup stage, be that via node distributes multiple Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI for multiple service flow with different service quality qos requirement by donor base station, wherein dynamically determined the quantity of distributed C-RNTI by donor base station according to channel conditions, load state and carrying number of users;
The multiple media access control MAC entities identified by described multiple C-RNTI are configured in via node; And
Utilize multiple MAC entity of configuring, described back haul link performs multiple MAC PDU with donor base station for the grouped data of described multiple service flow and transmits.
2. method according to claim 1, wherein said channel conditions comprise measured Signal to Interference plus Noise Ratio SINR and from via node power headroom report at least one.
3. method according to claim 1, wherein said is that the step that via node distributes multiple C-RNTI comprises for having multiple service flow that different QoS requires by donor base station:
When the quantity of distributed C-RNTI cannot meet the qos requirement of described multiple service flow, initiate redistributing described C-RNTI by donor base station or via node.
4. method according to claim 1, wherein described be, after via node distributes the step of multiple C-RNTI, also comprise for having multiple service flow that different QoS requires by donor base station:
According to the qos requirement of each service flow in multiple service flow, configure and manage the mapping relations of described service flow to logic channel and described multiple C-RNTI.
5. method according to claim 4, wherein said configuration also manages described service flow and comprises to the step of the mapping relations of logic channel and described multiple C-RNTI:
For the up link between donor base station and via node and down link, configure independently and manage described mapping relations.
6. method according to claim 1, multiple MAC entity that wherein said utilization configures perform for the grouped data of described multiple service flow the step that multiple MAC PDU transmits with donor base station and comprise on described back haul link:
Multiple relaying-Physical Downlink Control Channel R-PDCCH is sent to via node by donor base station, described R-PDCCH indexed resource block assignment information, modulation and encoding scheme and the cyclic redundancy check (CRC) by corresponding C-RNTI scrambling;
Via node utilizes the main C-RNTI distributed, and performs blind decoding to described R-PDCCH, and described main C-RNTI is for described donor base station and all known specific C-RNTI of via node; And
When finding the R-PDCCH mated with main C-RNTI, via node is for the secondary C-RNTI occurred in subframe, utilize and the offset information of PDCCH in its search volume of carrying main C-RNTI, blind decoding is carried out, to determine whether the transmission having multiple MAC PDU in this subframe in same offset position in the R-PDCCH search volume may carrying time C-RNTI.
7. method according to claim 1, multiple MAC entity that wherein said utilization configures perform for the grouped data of described multiple service flow the step that multiple MAC PDU transmits with donor base station and comprise on described back haul link:
Multiple R-PDCCH is sent to via node by donor base station, described R-PDCCH indexed resource block assignment information, modulation and encoding scheme and the cyclic redundancy check (CRC) by corresponding ORNTI scrambling;
Via node utilizes the main C-RNTI distributed, and performs blind decoding to described R-PDCCH, and described main C-RNTI is for described donor base station and all known specific C-RNTI of via node; And
When finding the R-PDCCH mated with main C-RNTI, based on the embedding information in the down link control information DCI of described R-PDCCH, determining the secondary C-RNTI of the scheduling of subframe, again search for R-PDCCH for determined C-RNTI and decode.
8. method according to claim 1, wherein, multiple MAC entity that described utilization configures perform for the grouped data of described multiple service flow the step that multiple MAC PDU transmits with donor base station and comprise on described back haul link:
In DL HARQ HARQ process on the Un interface of described back haul link, make each subframe support multiple HARQ procedure, and each HARQ procedure carry out explicit instruction by corresponding relaying-Physical Downlink Control Channel R-PDCCH.
9. method according to claim 1, wherein, described wireless communication system is multihop relay system.
10. the back haul link in a wireless communication system between donor base station and via node performs the via node that multiple medium access control layer protocol data cell MAC PDU transmits, comprising:
Inking device, via node startup stage, for multiple service flow with different service quality qos requirement, according to by donor base station being multiple Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI that via node distributes, in via node, configure the multiple media access control MAC entities identified by described multiple C-RNTI, wherein dynamically determined the quantity of distributed C-RNTI by donor base station according to channel conditions, load state and carrying number of users; And
Transfer device, utilizes multiple MAC entity of configuring, described back haul link performs multiple MAC PDU with donor base station for the grouped data of described multiple service flow and transmits.
11. via nodes according to claim 10, wherein said wireless communication system is multihop relay system.
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| CN201010503706.1A CN102448053B (en) | 2010-09-30 | 2010-09-30 | Back haul link performs method and the via node of multiple MAC PDU transmission |
| PCT/IB2011/002464 WO2012042376A1 (en) | 2010-09-30 | 2011-09-14 | Method and relay node for executing multiple media access control protocol data unit deliveries in a backhaul link |
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| CN201010503706.1A CN102448053B (en) | 2010-09-30 | 2010-09-30 | Back haul link performs method and the via node of multiple MAC PDU transmission |
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| US9078241B2 (en) | 2013-03-22 | 2015-07-07 | Sharp Kabushiki Kaisha | Systems and methods for establishing multiple radio connections |
| EP2830352A1 (en) * | 2013-07-24 | 2015-01-28 | Panasonic Intellectual Property Corporation of America | Efficient discard mechanism in small cell deployment |
| US10412571B2 (en) * | 2015-03-24 | 2019-09-10 | Qualcomm Incorporated | Configuration by eNB for D2D UE to network relay search |
| CN105792368B (en) * | 2016-02-26 | 2019-08-23 | 上海华为技术有限公司 | A kind of method, relevant device and system controlling information processing |
| CN108024349A (en) | 2016-11-04 | 2018-05-11 | 维沃移动通信有限公司 | Detection method, sending method, network side equipment and the terminal of down control channel |
| CN109842440B (en) | 2017-11-27 | 2021-08-27 | 华为技术有限公司 | Communication method, communication node and system |
| KR102322380B1 (en) * | 2018-02-14 | 2021-11-10 | 주식회사 케이티 | Methods for processing Uplink user data of relay node and Apparatuses thereof |
| CN110972191B (en) | 2018-09-28 | 2023-07-14 | 中兴通讯股份有限公司 | Data transmission and sending method, device and data transmission system |
| WO2020103772A1 (en) * | 2018-11-20 | 2020-05-28 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and network node for coordination of configured scheduling |
| TWI755657B (en) * | 2018-12-06 | 2022-02-21 | 財團法人工業技術研究院 | Centralized management node, distributed node, and method for packet delay control |
| CN111294939B (en) * | 2019-02-22 | 2023-04-18 | 展讯通信（上海）有限公司 | Capability reporting and distributing method and device of C-RNTI, storage medium, terminal and base station |
| JP6997852B2 (en) * | 2020-01-07 | 2022-01-18 | 華碩電腦股▲ふん▼有限公司 | Methods and equipment for requesting sidelink transmission resources in wireless communication systems |
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