CN101242243A

CN101242243A - Downlink transmission method, system, device and terminal for short position graph

Info

Publication number: CN101242243A
Application number: CNA2007100071609A
Authority: CN
Inventors: 柳光; 陈德; 周铮
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2007-02-05
Filing date: 2007-02-05
Publication date: 2008-08-13

Abstract

The invention relates to a wireless communication field, and discloses a down transmission method of a short bitmap, a system, a device and a terminal, which make the down high-speed ACK/NACK mechanism have a bigger adaptability. In the invention, by setting an information for indicating a belonging terminal of a short bitmap, the short bitmap and data in a wireless block are completely separated, that is the data and short bitmap in a wireless block may belong to different TBF of different terminals respectively to make high-speed ACK/NACK mechanism have a bigger adaptability. A USF in a RLC/MAC block and the short bitmap can be bound, and the USF is used to indicate the belonging terminal of the short bitmap. The invention also can add USF field in an ACK/NACK structure of the RLC/MAC block for indicating the belonging terminal of the short bitmap in a same time slot. The two schemes can be combined, and a bit is added to indicate which scheme is actually used.

Description

Short bitmap downlink transmission method, system, equipment and terminal

Technical field

The present invention relates to wireless communication field, particularly quick A CK/NACK (affirmation/non-affirmation) mechanism.

Background technology

Along with scientific and technological progress, people are also improving constantly the requirement of mobile communication business and quality.So demand that proposition seamlessly transits to the 3G (Third Generation) Moblie technology, to 3G (Third Generation) Moblie (The ThirdGeneration, the major technique of evolution abbreviation " 3G ") has GPRS (GeneralPacket Radio Service, be called for short " GPRS "), GSM (global mobile system) evolution strengthens data rate (Enhanced Data rates for GSM Evolution, be called for short " EDGE "), high speed circuit switched data (High Speed Circuit Switched Data, be called for short " HSCSD "), and the emphasis of research concentrates on and utilizes limited frequency spectrum resources to improve transmission rate and reduce propagation delay time.

GPRS is the packet data exchanged technology of introducing in the GSM network.It is superimposed on the gsm system, has prolonged the useful life of GSM, and it is based on the forwarding of packet data package and the statistic multiplexing of channel, thereby the data service that existing GSM is provided has leaped more than the 100Kbps from 9.6Kbps first.Because GPRS still adopts the GMSK the same with GSM (Guassian Minimum Shift Keying GMSK signal) modulation system, therefore transmission rate can't reach the 2Mbps of 3G business need, in order fully to satisfy the bandwidth demand that following radio multimedium is used, EDGE provides a transitional scheme from GPRS to the 3G (Third Generation) Moblie.EDGE is a kind of data enhancement mode mobile communication technology based on the GSM/GPRS network, is called the 2.75G technology by people again usually.The main purpose of this technology is to use broadband service, can allow the network of use 800,900,1800,1900MHz frequency range that the partial function of 3G (Third Generation) Moblie network is provided, it and universal mobile telecommunications system (Universal MobileTelecommunications System, be called for short " UMTS ") shared core net, by introducing Iu interface, evolution GSM EDGE Radio Access Network GERAN.

On the GERAN shared channel, the allocation of radio resources mode is to realize by Temporary Block Flow (TemporaryBlock Flow is called for short " TBF ").TBF is interim connection between travelling carriage (Mobile Station is called for short " MS ") and the network, only just exists in the process of data forwarding.The up-downgoing resource allocation is separate, but all is the control that is subjected to network.Down direction TBF is distributed by the network in general projected resources, and up direction TBF dispatches TBF taking resource by network by uplink state sign (Uplink State Flag is called for short " USF ").A TBF can comprise one or more Packet Data Channels (Packet Data Channel is called for short " PDCH ").TBF uses Temporary Block Flow indication (TemporaryFlow Identity is called for short " TFI ") sign.Radio block among the TBF is the resource that sends upper layer data, and these radio blocks are carried on time division multiple access (Time Division MultipleAccess is called for short " the TDMA ") frame of PDCH just.

With up TBF is example, and as shown in Figure 1, up TBF has been assigned with 1 PDCH:PDCH1.USF in the radio block of MS persistent surveillance and the corresponding down channel of up TBF, if monitor USF for oneself, then can in next block period, send upstream data.MS receives USF at descending frame N to the descending time slot 1 (being PDCH 1) of frame N+3 among Fig. 1, then sends data at frame N+4 to the ascending time slot 1 of frame N+7.From figure, it can also be seen that, radio block is made up of the identical time slot of 4 adjacent tdma frames, and the Transmission Time Interval of each radio block (Transmission Time Interval is called for short " TTI ") is about 20ms, therefore, claim that this TBF is the TBF of 20ms TTI.In like manner, on the down direction, USF is distributed on 4 tdma frames, is called 20ms USF.The span of USF was 0～7 (representing by 3 bits), and the USF on the same time slot can not repeat.The time slot of USF and its appearance can up TBF of unique indication.

Because one of target of GERAN evolution is exactly to support low time delay business on shared channel, and the TBF of 20ms TTI proves the demand that can not satisfy low time delay business such as conversation class by analysis.Therefore, a method that reduces time delay is reduced TTI (Reduced TTI is called for short " RTTI ") technology exactly.Specifically, radio block no longer is made up of the identical time slot of 4 adjacent tdma frames, but is made up of 2 time slots of 2 adjacent tdma frames, and like this, the transmission of each radio block has just reduced to 10ms at interval, therefore, claims that this TBF is the TBF of 10ms TTI.As shown in Figure 2, the TBF of up direction is the TBF of 10ms TTI, and the USF of down direction is distributed on 2 time slots of 2 tdma frames, is called 10ms USF.

Have under the situation of multipling channel at the TBF of 20ms TTI and the TBF of 10ms TTI, need utilize the USF of 20ms to indicate the TBF of the TTI of 10ms.As shown in Figure 3, if the TBF of a 20ms TTI is arranged on the PDCH 1, while PDCH 1﹠amp; Have the TBF of a 10ms TTI multiplexing on 2 again, this just need utilize the USF of 20ms to indicate the TBF of 10ms TTI, and corresponding relation is as follows, 20ms USF occurs and dispatch preceding 10ms PDCH1﹠amp among the 20ms TTI on PDCH1; Resource on 2 20ms USF in like manner occurs and dispatches back 10ms PDCH1﹠amp among the 20ms TTI on PDCH 2; Resource on 2.

Briefly, a TBF can use Radio Resource on one or more PDCH.Network has distributed Temporary Block Flow indication (Temporary Flow Identity is called for short " TFI ") for each TBF, and in the TBF of Chu Xianing, the TFI of each TBF is different at the same time.The time slot of distributing to GPRS is called PDCH, and a plurality of time slots can be combined as the PDCH group.The PDCH that network uses for the MS assignment by control information.On the descending PDCH that distributes, MS is by detecting the ownership that TFI discerns this TBF.

High-rise each logic link control (Logical Link Control, abbreviation " LLC ") frame is controlled (Radio Link Control by a series of Radio Links, be called for short " RLC ") the piece composition, every has corresponding piece sequence number (Block Sequence Number, abbreviation " BSN "), and according to the order of BSN transmit.Radio block is the base unit of allocation of radio resources and wireless transmission, and each radio block is made up of 4 time slots, and lays respectively at 4 continuous time division multiple accesses (Time Division MultipleAccess is called for short " TDMA ") frame.The transmission of RLC piece is carried by radio block, and because of the difference of coded system, 1 radio block can carry 2 RLC pieces at most.In order to optimize the transfer of data under the packet switched mode, RLC data block is transmitted under RLC/MAC (radio link layer/medium Access Layer) affirmation mode and is subjected to automatic repetitive requests (Automatic Repeat reQuest, be called for short " ARQ ") mechanism control, by the information of poll by terminal report related downlink situation and the successful RLC data block that receives.Polling mechanism is only applicable to downlink data transmission, issues polling request by packet control unit (Packet Control Unit is called for short " PCU ") control.Transmitting terminal comes the addressing RLC data block with send window, and in send window, RLC data block is expressed as not transmission, wait acknowledge respectively, correctly receives and wrong accepting state.If a RLC piece was not sent out, then be identified as not transmit status,, this piece is designated the wait acknowledge state in case being sent out.Can know after the ACK/NACK that receives downlink grouped (answering/no answering) message whether the piece that sends previously correctly receives, and corresponding renewal send window.If data block is correctly received, then this piece is identified as correct accepting state (ACK); If receive wrong or lose, then this piece is identified as wrong accepting state (NACK); If do not receive ACK/NACK, then keep the wait acknowledge state.After send window upgrades, can slide into the position of the data block of first dont answer.

The frequency of poll can be according to the adaptive adjustment of the situation of Radio Link, and when raising, poll frequency increases when wrong piece rate (Block ErrorRate is called for short " BLER "); Otherwise poll frequency reduces.Poll is also considered the scheduling frequency of RLC data block.Fig. 4 is the polling procedure of 12 RLC pieces for hypothesis polling interval under the ARQ mechanism.Because the rlc layer of terminal need be collected whole RLC pieces that the LLC frame comprised and could organize to wrap and pass to high level, transmits to the upper strata if a RLC lost block will influence the LLC frame.Network by poll after the ACK/NACK report of terminal response can know just whether this terminal correctly receives all descending RLC pieces.Because of poll is to produce at interval, when lost block occurring or when wrong, the piece that network can not be known at once and retransmit wrong piece or lose just can retransmit after having only by the time poll and terminal to report ACK/NACK report.In actual conditions, PCU knows descending wrong piece or loses the time that piece needs about 150～250ms, so just produces bigger transmission delay.

Therefore, as to the replenishing of polling mechanism, also adopted quick A CK/NACK (Fast Ack/Nack Report is called for short " FANR ") technology for feedback data piece reception condition in the GERAN evolution.The purpose of quick A CK/NACK is exactly to make transmit leg can learn the reception condition of data block fast, reduces the time (Round Trip Time is called for short " RTT ") in one week of round-trip of transmission of data blocks in conjunction with the RTTI technology of less transmission intercal.Different with traditional ACK/NACK mechanism, quick A CK/NACK not to be to adopt descending traditionally ACK/ACK message to send response, but ACK/NACK information and data block is issued in a RLC/MAC piece in order to respond transmit leg fast.Such ACK/NACK information field is called PAN (Piggybacked Ack/Nack).The radio block that embeds PAN like this includes: data block build (RLC/MAC Header), PAN and data load (RLC data block), as shown in Figure 5.

Wherein, (0) of data block 2 (0) expression is optional, and PAN also is an option, whether comprises PAN in the RLC/MAC piece and indicates by an idle bit in the data block build, and data block can have one to two.In GERAN, the USF and the data block build of CS-1 coding are weave ins in addition, and USF and data block build are mutually independently in the coding of other types.

The length of PAN is variable, may comprise 2 or a plurality of PAN in each RLC/MAC piece.The structure of PAN is as shown in table 1, the short bitmap (be BM) of PAN by comprising, the ACK/NACK information of carrying TBF.

Title	Length [bit]	Explanation
Title	Length [bit]	Explanation	Addr	0-5	Among the PAN with the address field (need unique indication a TBF) of TBF of affirmation message correspondence; This field is an option: if MS has only the TBF (being operated under affirmation mode and the non-persistent mode) of an opposite transmission direction, this PAN can only point to that TBF for example in uplink data block with PAN, if descending have only a TBF to be operated under affirmation mode or the non-persistent mode concerning MS, then PAN points to that TBF, does not need this address field (length is 0); If MS has greater than the TBF of an opposite transmission direction (being operated under affirmation mode and the non-persistent mode), this address field may sort according to the TFI sequence number of these TBF of rightabout transmission, if two TBF are for example arranged on the contrary, TFI=5 and TFI=12, this address field can be represented by one like this, 0 expression TFI=5,1 expression TFI=12
BoW	1	The beginning 0 of receive window: the oldest RLC data block 1:SSN that do not receive of starting block sequence number SSN representative represents the beginning of reported data piece, also has unreceived data block before this SSN.If the size of a receive window is greater than the length of a PAN, BOW can effectively represent the position of bitmap in window that report.This is assigned with under the situation of a plurality of time slots at a TBF be of great use.	Addr	0-5

SSN	2-11	The sequence number that bitmap begins
SSN	2-11	The sequence number that bitmap begins	BM	Remaining bits (variable-length)	Length-address size-SSN length-1 of length=PAN of reception condition (0-NACK/1-ACK) BM (bitmap) of the data block that begins from SSN+1

Table 1

But because in descending quick A CK/NACK, PAN and RLC/MAC data block all are distributed to same terminal (being MS), that is to say that the PAN of terminal must issue simultaneously with the packet of this terminal descending the time.If but the upstream rate of certain terminal is greater than downstream rate, network side just might occur and need issue ACK/NACK message immediately to this terminal, but owing to there is not the downlink data of this terminal, make network side just can't utilize short bitmap (PAN) to issue the situation of the ACK/NACK information of this terminal upstream data, if network side employing this moment issues descending Packet UplinkACK/NACK message (packet uplink ACK/NACK message) and transmits uplink ACK/nack message, can cause the utilance of downlink resource to descend.

Summary of the invention

The technical problem underlying that embodiment of the present invention will solve provides a kind of short bitmap downlink transmission method, system, equipment and terminal, makes descending quick A CK/NACK mechanism that greater flexibility arranged.

For solving the problems of the technologies described above, embodiments of the present invention provide a kind of short bitmap downlink transmission method, may further comprise the steps:

Network side is provided with terminal information under this weak point bitmap of indication in carrying the radio block of short bitmap, and issues this radio block to terminal;

Terminal receives and resolves the affiliated terminal information of the short bitmap of indication in the radio block, if this information indication is this terminal, then obtains short bitmap from this radio block.

Embodiments of the present invention also provide a kind of short bitmap downlink transmission system, and network side comprises: the unit of terminal information under this weak point bitmap of indication is set in carrying the radio block of short bitmap and issues the unit of radio block to terminal;

Terminal comprises: receive and also to resolve in the radio block unit of terminal information under the short bitmap of indication, judge this information indication whether be this terminal the unit and this information indication be this terminal the time from this radio block, obtain the unit of short bitmap.

Embodiments of the present invention also provide a kind of network equipment, comprising: the unit of terminal information under this weak point bitmap of indication is set in carrying the radio block of short bitmap and with radio block to unit that terminal issues.

Embodiments of the present invention also provide a kind of terminal, comprise: the unit that receives and resolve the affiliated terminal information of the short bitmap of indication in the radio block, judge the indication of this information whether be this terminal the unit and this information indication be this terminal the time from this radio block, obtain the unit of short bitmap.

The main effect of embodiment of the present invention is:

By terminal information under the short bitmap of indication is set, the short bitmap in the radio block is separated fully with data, promptly the data in radio block with lack bitmap and can belong to the different TBF of different terminals respectively, thereby make quick A CK/NACK have more flexibility.

Description of drawings

Fig. 1 is the schematic diagram according to up 20ms USF scheduling 20ms TTI TBF in the prior art;

Fig. 2 is the schematic diagram according to up 10ms USF scheduling 10ms TTI TBF in the prior art;

Fig. 3 is the schematic diagram according to up 20ms USF scheduling 10ms TTI TBF in the prior art;

Fig. 4 is to be the conventional poll flow chart of 12 RLC pieces according to polling interval in the prior art;

Fig. 5 is according to the RLC/MAC block structure schematic diagram that comprises PAN in the prior art;

Fig. 6 is the short bitmap downlink transmission method flow chart according to first embodiment of the invention;

Fig. 7 is according to the RLC/MAC block structure schematic diagram in the first embodiment of the invention;

Fig. 8 is the binding relationship schematic diagram according to USF under 20ms TTI in the first embodiment of the invention and PAN;

Fig. 9 is the binding relationship schematic diagram that USF and PAN under the situation of multipling channel are arranged according to the TBF at 20ms TTI and 10ms TTI in the first embodiment of the invention;

Figure 10 is the binding relationship schematic diagram according to USF under 10ms TTI in the first embodiment of the invention and PAN;

Figure 11 is according to the RLC/MAC block structure schematic diagram in the second embodiment of the invention;

Figure 12 is the short bitmap downlink transmission system structural representation according to fifth embodiment of the invention.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

First execution mode of the present invention relates to short bitmap downlink transmission method, and idiographic flow as shown in Figure 6.

In step 610, network side in carrying the radio block of short bitmap, be provided with the indication this weak point bitmap under terminal information, this radio block is the RLC/MAC piece.Specifically, in descending RLC/MAC piece, not only the USF field in this RLC/MAC piece build is used to indicate next block period of same time slot to give which terminal, also is used for indicating the short bitmap that is carried at this RLC/MAC piece to belong to which terminal.That is to say, adopted the method for USF and PAN binding,, illustrate that then the short bitmap in PAN that carries in this RLC/MAC piece belongs to terminal A if this USF indicating terminal A sends upstream data in next block period.Can determine USF with prior art earlier during specific implementation, the short bitmap with this USF institute counterpart terminal is carried in the same RLC/MAC piece again, also can make specific implementation comparatively flexible according to the short bitmap decision-making USF that will issue.

Therefore, the RLC/MAC block structure as shown in Figure 7, what oblique line was represented is a terminal, what vertical line was represented is another terminal, wherein the structure of PAN is still same as the prior art, and is as shown in table 1.Owing to realized separating fully of data division and the PAN that carries short bitmap in the RLC/MAC piece, make data and short bitmap in the RLC/MAC piece can belong to the different TBF of different terminals respectively, the indicated terminal of USF is exactly the terminal that will feed back in the short bitmap among the PAN, and by which TBF that further to indicate this weak point bitmap be this terminal of " Addr " field among the PAN, thereby make quick A CK/NACK have more flexibility.And, because by USF in the RLC/MAC piece build and short bitmap are bound, indicate terminal under this weak point bitmap, increase under the situation of any empty overhead need not, realized separating fully of data division and the PAN that carries short bitmap in the RLC/MAC piece.

Then, in step 620, network side sends to terminal with the RLC/MAC piece that this is provided with the affiliated end message of the short bitmap of indication.

Then, in step 630, terminal receives the RLC/MAC piece, and resolves the USF in this RLC/MAC piece build.

Then, in step 640, this USF of terminal judges indication whether be this terminal, if this USF indication is this terminal, illustrate that then the short bitmap that carries in this RLC/MAC piece is to the feedback information of the ACK/NACK of the up TBF of this terminal, enters step 650; Otherwise, process ends.

In step 650, terminal is obtained short bitmap from the PAN of this RLC/MAC piece, obtains the feedback information of ACK/NACK of the up TBF of this terminal.That this terminal is known this weak point bitmap correspondence by " Addr " field among the PAN is which up TBF of this terminal.

What deserves to be mentioned is, under 20ms TTI, the binding relationship of 20ms USF and PAN as shown in Figure 8, USF and PAN take a time slot of 4 adjacent tdma frames respectively; Have under the situation of multipling channel at the TBF of 20ms TTI and 10ms TTI, USF and binding relationship PAN as shown in Figure 9, USF still takies a time slot of 4 adjacent tdma frames, and PAN can take 2 time slots of 2 adjacent tdma frames; Under 10ms TTI, the binding relationship of 10ms USF and PAN as shown in figure 10, USF and PAN take 2 time slots of 2 adjacent tdma frames respectively.

Second execution mode of the present invention relates to short bitmap downlink transmission method, the present embodiment and first execution mode are roughly the same, and its difference is, in the first embodiment, network side is indicated the affiliated terminal of short bitmap in this RLC/MAC piece by the USF field in the RLC/MAC piece build.And in the present embodiment,, the USF field is set among the PAN promptly by in quick A CK/NACK structure, indicate the affiliated terminal of short bitmap in this RLC/MAC piece.

Specifically, present embodiment is still continued to use the thought with the affiliated terminal binding of USF and PAN, USF field in the indication RLC/MAC piece build, only be used to indicate next block period of same time slot to give which terminal, newly-increased USF field among the PAN that carries with the RLC/MAC piece comes the short bitmap among unique indication PAN to belong to which terminal, and by which TBF that further to indicate this weak point bitmap be this terminal of " Addr " field among the PAN.RLC/MAC block structure in the present embodiment as shown in figure 11, the PAN structure is as shown in table 2:

Title	Length [bit]	Explanation
Title	Length [bit]	Explanation	USF
	3	By terminal of the unique indication of this USF field.	USF
	3	By terminal of the unique indication of this USF field.	Addr	0-5	Among the PAN with this field of address field (need unique indication a TBF) of TBF of affirmation message correspondence be option: if terminal has only the TBF (being operated under affirmation mode and the non-persistent mode) of an opposite transmission direction, this PAN can only point to that TBF for example in uplink data block with PAN, if descending have only a TBF to be operated under affirmation mode or the non-persistent mode concerning terminal, then PAN points to that TBF, does not need this address field (length is 0); If terminal has greater than the TBF of an opposite transmission direction (being operated under affirmation mode and the non-persistent mode), this address field may sort according to the TFI sequence number of these TBF of rightabout transmission, if two TBF are for example arranged on the contrary, TFI=5 and TFI=12, this address field can be represented by one like this, 0 expression TFI=5,1 expression TFI=12
BoW	1	The oldest RLC data block 1:SSN that do not receive of beginning 0:SSN representative of receive window represents the beginning of reported data piece, also has unreceived data block before this SSN.If the size of a receive window is greater than the length of a PAN, BOW can effectively represent the position of bitmap in window that report.This is assigned with under the situation of a plurality of time slots at a TBF be of great use.	Addr	0-5
BoW	1		SSN	2-11	The sequence number that bitmap begins
BM	Remaining bits (variable-length)	Length-USF length-Addr length-SSN length-1 of length=PAN of reception condition (0-NACK/1-ACK) BM (bitmap) of the data block that begins from SSN+1	SSN	2-11	The sequence number that bitmap begins

Table 2

Be not difficult to find, because in the present embodiment, by newly-increased USF field in the PAN of RLC/MAC piece, be implemented in the terminal that the short bitmap of indication is belonged under the same time slot, therefore, can be limited by the USF in the build, that is to say, not only realized separating fully of data division and the PAN that carries short bitmap in the RLC/MAC piece, and the separating of USF in the PAN that has realized carrying in the RLC/MAC piece short bitmap and the RLC/MAC piece build, make quick A CK/NACK have more flexibility.

The 3rd execution mode of the present invention relates to short bitmap downlink transmission method, present embodiment combines the method that the affiliated end message of the short bitmap of indication is set in first execution mode and second execution mode, represent it is to adopt indicating means in first execution mode by in PAN, increasing an indicating bit (by the USF field in the RLC/MAC piece build, indicate the affiliated terminal of short bitmap in this RLC/MAC piece), still adopt indicating means in second execution mode (by the USF field is set in PAN, indicate the affiliated terminal of short bitmap in this RLC/MAC piece), such as, with this indicating positions is 0 o'clock, the indicating means in first execution mode is adopted in expression, by the USF field in the RLC/MAC piece build, indicate the affiliated terminal of short bitmap in this RLC/MAC piece; With this indicating positions is 1 o'clock, and the indicating means in second execution mode is adopted in expression, by the USF field is set in PAN, indicates the affiliated terminal of short bitmap in this RLC/MAC piece.Need to prove, only when indicating bit is represented to be the indicating means that adopts in second execution mode, in PAN, comprise the USF field of 3 bits, to reduce empty overhead.

The structure of PAN is as shown in table 3:

Name	Length [bit]	Explanation
Name	Length [bit]	Explanation	Indicator (indicating bit)	1	Indication is the method in 1: the second execution mode of method that adopts in 0: the first execution mode of method in first execution mode or the method in second execution mode
USF			Indicator (indicating bit)	1
USF		3	If if the Indicator bit is 0 then not have this field Indicator bit be 1 then come MS of unique indication by this USF field.
Addr		3		0-5	Among the PAN with this field of address field (need unique indication a TBF) of TBF of affirmation message correspondence be option: if terminal has only the TBF (being operated under affirmation mode and the non-persistent mode) of an opposite transmission direction, this PAN can only point to that TBF for example in uplink data block with PAN, if descending have only a TBF to be operated under affirmation mode or the non-persistent mode concerning terminal, then PAN points to that

		Individual TBF does not need this address field (length is 0); If terminal has greater than the TBF of an opposite transmission direction (being operated under affirmation mode and the non-persistent mode), this address field may sort according to the TFI sequence number of these TBF of rightabout transmission, if two TBF are for example arranged on the contrary, TFI=5 and TFI=12, this address field can be represented by one like this, 0 expression TFI=5,1 expression TFI=12
			BoW	1	The oldest RLC data block 1:SSN that do not receive of beginning 0:SSN representative of receive window represents the beginning of reported data piece, also has unreceived data block before this SSN.If the size of a receive window is greater than the length of a PAN, BOW can effectively represent the position of bitmap in window that report.This is assigned with under the situation of a plurality of time slots at a TBF be of great use.
SSN	2-11	The sequence number that bitmap begins	BoW	1
SSN	2-11	The sequence number that bitmap begins	BM	Remaining bits (variable-length)	The reception condition (0-NACK/1-ACK) of the data block that begins from SSN+1

Table 3

Be not difficult to find,, indicate reality to use which scheme by increasing a bit, thereby can enjoy the advantage of two schemes because present embodiment has been used in combination the method for two kinds of affiliated end messages of the short bitmap of indication.Use last scheme when for example terminal is consistent under the USF in RLC/MAC piece build and the short bitmap, reducing empty overhead, use back one scheme when terminal is inconsistent under the USF in build and the short bitmap, can in time issue to guarantee the weak point bitmap.

The 4th execution mode of the present invention relates to short bitmap downlink transmission method, the present embodiment and first execution mode are roughly the same, and its difference is, in the first embodiment, network side is indicated the affiliated terminal of short bitmap in this RLC/MAC piece by the USF field in the RLC/MAC piece build.And in the present embodiment, by in quick A CK/NACK structure, i.e. Addr field among the PAN is indicated the terminal under the short bitmap in this RLC/MAC piece, and that indicate this weak point bitmap correspondence simultaneously is which TBF of this terminal.

Specifically, because the different TBF of the different terminals of TFI on can channel of unique indication, therefore, can be by being 5 bits with the Addr field extension among the PAN, indicating the short bitmap that is carried among this PAN with complete 5bitTFI is which TBF that belongs to which terminal.Therefore, realized the separating fully of data and short bitmap in the RLC/MAC piece.

In addition, be which TBF of terminal because the Addr field among the present PAN is used to indicate, if this terminal has only a TBF, then this PAN can carry the Addr field, so the Addr field is an option.And in the present embodiment, it is essential that needs change this field into, to guarantee to receive the UE of this RLC/MAC piece, can judge therefrom whether the short bitmap that carries in this RLC/MAC piece is the short bitmap of this terminal.

The 5th execution mode of the present invention relates to short bitmap downlink transmission system, comprises network side and terminal, as shown in figure 12.

In network side, comprise: the unit is set, is used for terminal information under the RLC/MAC piece that carries short bitmap is provided with this weak point bitmap of indication; And transmitting element, be used for issuing the unit of RLC/MAC piece to terminal.

Comprise in terminal: receiving element is used for receiving and the affiliated terminal information of the short bitmap of parsing RLC/MAC piece indication; Judging unit, whether what be used to judge the information indication that parses is this terminal; And acquiring unit, be used for the indication of this information be this terminal the time obtain short bitmap from this RLC/MAC piece.Because therefore data in RLC/MAC piece and lack the different TBF that bitmap can belong to different terminals respectively, can make descending quick A CK/NACK mechanism that greater flexibility has been arranged.

Wherein, terminal information is the USF field in the RLC/MAC piece build under the short bitmap of indication, to avoid increasing empty overhead; Perhaps, terminal information is the USF field that is provided with among the PAN of RLC/MAC piece under the short bitmap of indication, and the indication of terminal can not be limited by the USF in the build under the feasible short bitmap, has greater flexibility; Perhaps, Addr field among the PAN that the affiliated terminal information of the short bitmap of indication is the RLC/MAC piece, this Addr field is which TBF that belongs to which terminal by the short bitmap that adopts TFI to come unique identification to be carried among this PAN.

In addition, need to prove, short bitmap downlink transmission system in the present embodiment can also be included in the unit that indication field is set among the PAN of RLC/MAC piece, this indication field is used in reference to be shown in has used any mode that the affiliated terminal information of the short bitmap of indication is set in this RLC/MAC piece, optionally set-up mode comprises:

Mode one, with the USF field in the build as terminal information under the short bitmap of indication;

Mode two, with the USF field that is provided with among the PAN as terminal information under the short bitmap of indication.

Wherein, the USF field only exists when occupation mode two among the PAN.

Need to prove that each unit in the present embodiment is logical block, in actual applications, can realize by one or more physical entities.

In sum, in the embodiments of the present invention, by terminal information under the short bitmap of indication is set, short bitmap in the radio block is separated fully with data, promptly the data in radio block can belong to the different TBF of different terminals respectively with short bitmap, thereby make quick A CK/NACK have more flexibility.

Can be with USF in the RLC/MAC piece build and short bitmap binding, the terminal of using the short bitmap of USF indication to be belonged to.USF is former to be used to indicate the next block period of same time slot to return which terminal to use, this function keeps, the terminal that while is belonged to the short bitmap of this USF indication, can determine USF with prior art earlier during specific implementation, short bitmap with this USF institute counterpart terminal is carried in the same RLC/MAC piece again, also can be according to the short bitmap decision-making USF that will issue, specific implementation is comparatively flexible.The scheme of USF in the RLC/MAC piece build and short bitmap binding be need not to increase any empty overhead.

Also can in the quick A CK/NACK of RLC/MAC piece structure, increase the USF field newly, be used for the terminal that the short bitmap of indication is belonged under same time slot.This scheme can not be limited by the USF in the build, has greater flexibility.

Can also be used in combination above-mentioned two kinds of schemes, increase a bit indication reality and used which scheme, thereby can enjoy the advantage of two schemes.Use last scheme when for example terminal is consistent under the USF in build and the short bitmap, reducing empty overhead, use back one scheme when terminal is inconsistent under the USF in build and the short bitmap, can in time issue to guarantee the weak point bitmap.

Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.

Claims

1. one kind short bitmap downlink transmission method is characterized in that, may further comprise the steps:

Terminal receives and resolves the affiliated terminal information of the short bitmap of indication in the described radio block, if this information indication is this terminal, then obtains described short bitmap from this radio block.

2. short bitmap downlink transmission method according to claim 1 is characterized in that, described radio block is Radio Link control and media interviews control RLC/MAC piece.

3. short bitmap downlink transmission method according to claim 2 is characterized in that, terminal information is the uplink state sign USF field in the described RLC/MAC piece build under the short bitmap of described indication.

4. short bitmap downlink transmission method according to claim 2 is characterized in that, terminal information is the USF field that is provided with in the quick A CK/NACK of described RLC/MAC piece structure under the short bitmap of described indication.

5. short bitmap downlink transmission method according to claim 2 is characterized in that, and is further comprising the steps of:

Before issuing described radio block, in the quick A CK/NACK of described RLC/MAC piece structure, indication field is set, this indication field is used in reference to be shown in has used any mode that the affiliated terminal information of the short bitmap of described indication is set in this RLC/MAC piece, optional mode comprises:

Mode one, with the USF field in the build as terminal information under the short bitmap of described indication;

Mode two, with the USF field that is provided with in the quick A CK/NACK structure as terminal information under the short bitmap of described indication;

Wherein, the USF field in the quick A CK/NACK structure only exists when using described mode two.

6. short bitmap downlink transmission method according to claim 2, it is characterized in that, terminal information is " Addr " field in the quick A CK/NACK of described RLC/MAC piece structure under the short bitmap of described indication, should " Addr " field adopt Temporary Block Flow to identify the TBF of the described terminal of TFI unique identification.

7. one kind short bitmap downlink transmission system is characterized in that network side comprises: the unit of terminal information under this weak point bitmap of indication is set in carrying the radio block of short bitmap and issues the unit of radio block to terminal;

Terminal comprises: receive and resolve in the described radio block unit of terminal information under the short bitmap of indication, judge this information indication whether be this terminal the unit and this information indication be this terminal the time from this radio block, obtain the unit of described short bitmap.

8. short bitmap downlink transmission system according to claim 7 is characterized in that described radio block is the RLC/MAC piece;

Terminal information is the uplink state sign USF field in the described RLC/MAC piece build under the short bitmap of described indication, perhaps, terminal information is the USF field that is provided with in the quick A CK/NACK structure of described RLC/MAC piece under the short bitmap of described indication, perhaps, terminal information is " Addr " field in the quick A CK/NACK of described RLC/MAC piece structure under the short bitmap of described indication, should " Addr " field adopt Temporary Block Flow to identify the TBF of the described terminal of TFI unique identification.

9. short bitmap downlink transmission system according to claim 7 is characterized in that described radio block is the RLC/MAC piece;

Also be included in the unit that indication field is set in the quick A CK/NACK structure of described RLC/MAC piece, this indication field is used in reference to be shown in has used any mode that terminal information under the short bitmap of described indication is set in this RLC/MAC piece, and optional mode comprises:

10. a network equipment is characterized in that, comprising: the unit of terminal information under this weak point bitmap of indication is set in carrying the radio block of short bitmap and with radio block to unit that terminal issues.

11. terminal, it is characterized in that, comprise: receive and also to resolve in the radio block unit of terminal information under the short bitmap of indication, judge this information indication whether be this terminal the unit and this information indication be this terminal the time from this radio block, obtain the unit of described short bitmap.