CN101636957A

CN101636957A - Method and apparatus for polling in a wireless communication system

Info

Publication number: CN101636957A
Application number: CN200880008539A
Authority: CN
Inventors: A·梅朗; S·Y·D·何; E·F·沙蓬尼尔
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2007-03-16
Filing date: 2008-03-17
Publication date: 2010-01-27
Also published as: UA96020C2

Abstract

A data packet communication system employs radio link control (RLC) transmission between a transmitter and a receiver with an Automatic Repeat Request (ARQ) arrangement whereby polling of the receiver is accomplished with reduced amount of redundantly transmitted data, such as between an access node and terminal. Upon a polling event, such as emptying of a transmission buffer of the transmitter, expiration of a polling timer, or reaching a radio link control (RLC) protocol data units (PDUs) count threshold, the transmitter sends a polling command to the receiver. This polling command is smaller than any of the RLC PDUs, which are conventionally resent with a polling bit set to evoke a STATUS PDU from the receiver. With evolving communication standards tending toward larger PDUs, such as in excess of a kilobyte for HSPA+ (High-Speed Packet Access Evolution) and 3GPP LTE (Long Term Evolution), this inefficiency can be of increasing impact.

Description

Be used for carrying out the method and apparatus of poll at wireless communication system

Priority request according to 35U.S.C. § 119

The title that present patent application requires to submit on March 16th, 2007 is the provisional application No.60/895 of " METHOD ANDAPPARATUS FOR POLLING IN A WIRELESS COMMUNICATIONSYSTEM ", 394 priority, this provisional application has transferred the application's assignee, clearly incorporates it into this paper by reference hereby.The title that present patent application requires to submit on March 17th, 2007 is the provisional application No.60/895 of " METHOD AND APPARATUS FOR POLLING IN AWIRELESS COMMUNICATION SYSTEM ", 451 priority, this provisional application has transferred the application's assignee, clearly incorporates it into this paper by reference hereby.

Technical field

The application relates to radio access network and carries out data packet transmission from transmitted from transmitter to receiver, the communication that this radio access network is used to confirm reliably.

Background technology

Layer 2 standard of 3GPP (third generation partner program) line of specifications are characterized by automatic repeat requests (ARQ) mechanism the part of Radio Link control (RLC) agreement.When RLC created protocol Data Unit (PDU), data were submitted to lower level and are buffered, and confirm its reception or abandon the timer order to abandon this PDU up to receiver.The sequence number branch that dullness increases is tasked each PUD, the PUD that receives is resequenced, and detect lost packets in the sequence that receives to allow receiver.

RLC has stipulated to carry packet format and process from the buffer status information of receiver by status PDU (STATUS PDU), and stipulated the process of this information of transmitter requests, " poll (Poll) " among selected RLC PDU position carries out by being provided with for it.

The transmission of various timers and Event triggered Poll or STATUS control command.For example, transmitter can be with periodic intervals, as when having sent N PDU, sends polling order, as long as when perhaps having sent last data in the RLC buffer, just sends polling order.Receiver can be ordered in response to Poll, with periodic intervals (that is, whenever receiving N PDU), perhaps as long as owing to the vacancy in the sequence number detects when having lost PDU, just send STATUS PDU.

When transmitter will send poll, transmitter was selected the RLC PDU that is not identified as yet and is retransmitted the PDU that poll bit is set to " 1 ", to send polling order to receiver.The example of this realization is a Universal Mobile Telecommunications System (UMTS) the 5th edition.The bigger PDU of the modification support of the system architecture of HSPA+ (high-speed packet access evolution) and 3GPP LTE (third generation partner program Long Term Evolution) is to reduce expense.Although retransmit complete PDU may be satisfied scheme for the PDU of modest size, and retransmitting big PDU in the system that upgrades may become a kind of waste.

Summary of the invention

Set forth brief overview below, so that the basic comprehension to some schemes in the disclosed scheme to be provided.This general introduction is not an exhaustive overview, and both has been not intended to identify key or important elements, is not intended to describe the scope of these schemes yet.Its objective is some notions of setting forth disclosed feature with the form of simplifying, as the preamble of the more detailed description of setting forth later.

According to one or more schemes and corresponding open, the mode of binding data transmitted in packets is described various schemes, wherein, sends polling request to eliminate the form that needs to retransmit user data, and improves data efficiency thus.

In a scheme, provide a kind of method that is used under the situation that reduces possible redundant data transmissions, carrying out to remote receiver reliable transmission from local transmitter.Radio link commands is sent to remote receiver from local transmitter.In response to detecting poll event, send the polling order of the data of the RLC PDU that sends before having omitted in fact.Subsequently, from receiver accepting state PDU.

In another program, at least one processor is configured to carry out reliable transmission from local transmitter to remote receiver under the situation that reduces possible redundant data transmissions.First module sends to remote receiver with Radio link commands from local transmitter.Second module responds sends polling order in detecting poll event under the situation of the transmission that does not need user plane data.Three module is from described remote receiver accepting state PDU.

In another scheme, a kind of computer program provides from the reliable transmission of transmitted from transmitter to receiver under the situation that reduces possible redundant data transmissions.Computer-readable medium has first group of code, and it makes computer that Radio link commands is sent to remote receiver from local transmitter.Second group of code makes described computer in response to detecting poll event, under the situation of the transmission that does not need user plane data, sends polling order.The 3rd group of code makes described computer accepting state PDU.

In a scheme again, a kind of device provides the reliable transmission from the local transmitter to the remote receiver under the situation that reduces possible redundant data transmissions.Provide a unit to be used for Radio link commands is sent to remote receiver from local transmitter.Provide another unit to be used under the situation of the transmission that does not need user plane data, sending polling order in response to detecting poll event.In addition, providing again, a unit is used for accepting state PDU.

In a scheme again, provide a kind of be used under the situation that reduces possible redundant data transmissions to carry out the device of reliable transmission to remote receiver from local transmitter, it comprises memory.Local transmitter sends to remote receiver with the Radio link commands that comprises in the described memory.The poll unit response generates polling order and makes described local transmitter send this polling order under the situation of the transmission that does not need user plane data in detecting poll event.Local receiver is from described remote receiver accepting state PDU.

In a scheme again, provide a kind of method that is used under the situation of the reception that reduces possible redundant data, carrying out from distance transmitter reliable reception at the local receiver place.Reception is from the Radio link commands of transmitted from transmitter to receiver.Detect poll event in response to described transmitter, receive the polling order of the data of the RLC PDU that sends before having omitted in fact.Then, come transmit status PDU based on signaling information.

In a scheme again, at least a processor is configured to carry out reliable reception at the local receiver place from distance transmitter under the situation of the reception that reduces possible redundant data.First module receives the Radio link commands from the distance transmitter to the local receiver.Second module responds detects poll event in described distance transmitter, receives polling order under the situation of the transmission that does not need user plane data.Three module comes transmit status PDU based on signaling information.

In a scheme again, a kind of computer program is provided at the reliable reception that the local receiver place carries out from distance transmitter under the situation of the reception that reduces possible redundant data.Computer-readable medium has first group of code, and it makes computer receive the Radio link commands from the distance transmitter to the local receiver.Second group of code makes described computer detect poll event in response to described distance transmitter, receives polling order under the situation of the transmission that does not need user plane data.The 3rd group of code makes described computer based come transmit status PDU in signaling information.

In a scheme again, a kind of device is provided at the reliable reception that the local receiver place carries out from distance transmitter under the situation of the reception that reduces possible redundant data.Provide a unit to be used to receive Radio link commands from the distance transmitter to the local receiver.Provide another unit to be used for detecting poll event, under the situation of the transmission that does not need user plane data, receive polling order in response to described transmitter.Provide again a unit to be used for coming transmit status PDU based on signaling information.

In a scheme again, a kind of device is provided, be used under the situation of the reception that reduces possible redundant data, carrying out reliable reception from distance transmitter at the local receiver place, comprise memory and local receiver, described local receiver receives Radio link commands from distance transmitter, so that it is stored in the described memory, and be used under the situation of the transmission that does not need user plane data, receiving polling order.Status component generates status PDU and makes receiver transmit status PDU in response to described polling order.Described distance transmitter accepting state PDU.

In order to realize aforementioned and related objective, the feature that one or more schemes are included in complete hereinafter description and specifically note in claims.Following specification and accompanying drawing have elaborated some illustrative scheme, and have only indicated in the variety of way of the principle that can adopt these schemes a few.When considering in conjunction with the accompanying drawings, other advantages and novel feature will become apparent from following detailed description, and disclosed scheme intention comprises all these schemes and equivalent thereof.

Description of drawings

When in conjunction with the accompanying drawings, the feature of present disclosure, character and advantage will become more apparent from the following detailed description of setting forth, and wherein, reference symbol identical in the full text identifies respective items, and wherein:

Fig. 1 has illustrated the packet that is used for sending by transmitter reliable affirmation, and receives the block diagram of the communication system of this packet by receiver;

Fig. 2 has illustrated and has utilized polling order to carry out the flow chart of the method for reliable transmission;

Fig. 3 has illustrated the block diagram of the data structure of the superwood section that is used to transmit polling message (SUper FIeld (the SUFI)) form according to a scheme;

Fig. 4 has illustrated the block diagram of data structure of Radio Link control (RLC) protocol Data Unit (PDU) form that is used to transmit polling message according to another program;

Fig. 5 has illustrated the block diagram of example data structure of RCL AM data (AMD) PDU of another scheme;

Fig. 6 has illustrated the figure according to the multi-address radio communication system of the support polling order of a scheme; And

Fig. 7 has illustrated the schematic block diagram of supporting the communication system of polling order;

Fig. 8 has illustrated to have the block diagram of transmitter that is used for polling order is sent to the module of receiver; And

Fig. 9 has illustrated the block diagram of the receiver with the module that is used to receive polling order and responds with status PDU.

Embodiment

Data packet communication system adopts between transmitter and receiver has Radio Link control (RLC) transmission that automatic repeat requests (ARQ) is provided with, and realizes the poll of receiver thus under the situation of the data volume that reduces possible redundant transmission.In case the generation poll event, for example, the transmit buffer of transmitter expires, reaches rlc protocol data cell (PDU) count threshold or reach uncompleted emission byte number of threshold values for empty, poll timer, and transmitter sends to receiver with polling order.This polling order can be less than any RLC PDU.In illustrative approach, polling order can be the status PDU that sends from access node, and it comprises the superwood section (Super Field (SUFI)) that is used for poll.Polling order can be the poll pdu as special-purpose control command.Polling order can be the RLC PDU that degenerates, and its size is set to eliminate fully data.Therefore, the use of polling order has avoided using such problem in the usual manner, that is, this usual manner resends has the complete RLC PDU that poll bit is provided with, with from the solicited status PDU that accesses terminal (STATUS PDU).Along with the bigger PDU evolution of communication standard court, for example, surpass the HSPA+ (high-speed packet access evolution) and the 3GPP LTE (that is, Long Term Evolution (LTE)) of kilobytes, the influence of this inefficiency problem may increase.

Referring now to accompanying drawing various schemes are described.In the following description, for illustrative purposes, many specific detail have been set forth so that the thorough to one or more schemes to be provided.Yet, apparently, can not have to put into practice these schemes under the situation of these specific detail.In other examples, structure of knowing altogether and equipment are illustrated with the form of block diagram, so that describe these schemes.

As used in this application, term " parts ", " module ", " system " etc. refer to for the relevant entity of computer, that is, and and the combination of hardware, hardware and software, software or executory software.For example, parts can be but the process that is not limited to move on the processor, processor, object, thread, program and/or the computer that can carry out, carry out.Explanation as an example, the application that moves on the server and this server can be parts.One or more parts can reside in the process and/or thread of execution, and parts can be positioned on the computer, and/or are distributed between two or more computers.

Word " exemplary " is used for expression " as example, example or explanation " in this article.Any scheme or design that this paper is described as " exemplary " must not be construed as preferred or favourable with respect to other scheme or design.

In addition, one or more versions can be embodied as the goods of method, device or use standard programming and/or engineering, control the disclosed scheme of computer realization to produce software, firmware, hardware or its combination in any.Comprise can be from the computer program of any computer readable device, carrier or medium access for term " goods " (perhaps replacedly, " computer program ") intention as used herein.For example, computer-readable medium can include but not limited to: magnetic storage apparatus (for example, hard disk, floppy disk, magnetic stripe ...), CD (for example, compact disk (CD), digital multi-purpose disk (DVD) ...), smart card and flash memory device (for example, card, rod).In addition, should be appreciated that carrier wave can be used for carrying computer-readable electronic, for example, send and receive the electronic data that uses in the such network of Email or visit such as the Internet or Local Area Network.Certainly, those skilled in the art will recognize that, can under the situation of the scope that does not depart from disclosed scheme, make many modifications this configuration.

To illustrate various schemes according to the system that can comprise a plurality of parts, module etc.Should be appreciated that and recognize that various systems can comprise other parts, module etc., and/or all parts that can not comprise in conjunction with the accompanying drawings being discussed, module etc.Also can use the combination of these modes.Various scheme disclosed herein can be carried out on electronic equipment, and these electronic equipments comprise the equipment that utilizes touch screen display technologies and/or mouse button dish-type interface.The example of these equipment comprises computer (desk-top or mobile), smart phone, PDA(Personal Digital Assistant), and other wired and radio-based electronic devices.

Go to accompanying drawing, in Fig. 1, communication system 10 provides from transmitter 12 to receiver 14 reliable data packet transmission.User data is divided into a plurality of Radio Link control (RLC) PDU 16,17,18, they are stored in transmitter (TX) window 20, pass through link 24 with its emission up to Radio Link control 22, receive to be received machine 14, the RLC 26 of receiver 14 is stored in the RLC PDU 16-18 that receives in the RX window 28, handles with the signaling status that traces into according to RX Window state parts 30.The TX window poll event of transmitter 12 (for example, timer) parts 32 need to determine the state of the RX window 28 of receiver 14.Poll command message 34 is prepared by RX window poll parts 36, and is sent to receiver 14 on link 24, and receiver 14 then responds on up link 40 with RX Window state 38.

Benefit from the disclosure, should be appreciated that Radio Link control is the agreement in " layer 2 " of telecommunication system, wherein, as the example of the RLC of LTE among the RLC of HSPA and the 3GPP, this agreement realizes ARQ (repeat requests automatically).In addition, technology described herein can be used for various wireless communication systems, for example, and CDMA, TDMA, FDMA, OFDMA, SC-FDMA and other system.Term " system " and " network " are used interchangeably usually.Cdma system can be realized such as such wireless technologys such as general land wireless access (UTRA), CDMA 2000.UTRA comprises other variant of wideband CDMA (W-CDMA) and CDMA.In addition, CDMA2000 has been contained IS-2000, IS-95 and IS-856 standard.Tdma system can be realized such as the such wireless technology of global system for mobile communications (GSM).The OFDMA system can realize such as evolved UTRA (E-UTRA), Ultra-Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-

Etc. such wireless technology.UTRA and E-UTRA are the parts of Universal Mobile Telecommunications System (UMTS).3GPP Long Term Evolution (LTE) is to use the UMTS version of E-UTRA, and this version adopts OFDMA on down link, adopts SC-FDMA on up link.In document, UTRA, E-UTRA, UMTS, LTE and GSM have been described from " third generation partner program " tissue (3GPP) by name.In document, CDMA 2000 and UMB have been described from " third generation partner program 2 " tissue (3GPP2) by name.These various wireless technologys and standard are known in this area.

Benefit from the disclosure, should be appreciated that RLC is divided into user data the PDU of fixed size before HSPA+ and LTE introducing evolution; For example, 20,40 or 80 bytes.Therefore, should be appreciated that, need to retransmit a PDU with poll (Poll) 20,40 or 80 bytes that are provided with in order after empty, to begin poll at transmit buffer.Yet this method has been introduced with the size of user's payload and has been compared and inapparent expense.

The communication protocol that is used for HSPA+ and LTE allows the RLC PDU of variable size, handles with the efficient and the minimizing that improve agreement.The size of RLC PDU is to select according to the size of the transmission block that distributes on the channel at present.In view of the high throughput that realizes in physical layer, the size of RLC PDU can surpass kilobytes.Under the situation of not revising existing standard, should be appreciated that RLC need transmit so possible big RLC PDU, comes the poll receiver.Many schemes all relate to initiates to minimize the poll that transmits the required expense of polling message in wireless communication system.Particularly, scheme relates under the situation of the user data of transmission before not needing to retransmit and transmits polling message.It is following that what discuss is the current method of the ratio the whole bag of tricks more efficiently that is used to transmit polling message.

In Fig. 2, the method 100 that is used to transmit poll has described to detect the multiple mode of poll event and the multiple mode of arranging the form of polling order 34, but not retransmits RLC PDU 16-18, thereby improves data transmission efficiency.The every kind of polling order 34 that uses in mode replacedly or optionally is much smaller than RLC PDU 16-18.In frame 102, judge that whether poll event expires for the poll timer.If not yet due, then in frame 104, further judge whether to have satisfied PDU count threshold or byte count threshold.If do not satisfy, judge further in frame 106 then whether transmitter (TX) window is empty.Should be noted that no matter the sort of poll event is used to initiate polling order, can use the present invention.The present invention can also use may be in other poll event of definition in future.If be not empty, then handle turning back to frame 102, want detected poll event to continue wait.Should be appreciated that and only can monitor one or two such incident.

If for example in frame 102,104,106, detected poll event arbitrarily, then in frame 108, carry out the operation that sends polling order.In illustrative version, the poll (frame 110) of three polling order 34: user mode PDU, the poll (frame 112) that uses poll pdu and the remainder have been described according to RLC PDU (frame 114).Then, transmitter receives response from receiver, and this response is the status PDU in the frame 116.

The poll of user mode PDU (STATUS PDU).STATUS PDU is the flexible container that is used to be called the information element of superwood section (SUper FIeld (SUFI)).Define many SUFI, having comprised: the affirmation SUFI (Ack SUFI) of the highest serial number that is used for confirming that sequence receives, be used to list the bitmap SUFI (bitmap SUFI) that represents Ack/Nak from the tabulation SUFI (List SUFI) of the Ack/Nak sequence of homing sequence number beginning, with bitmap form etc.Transmitter (for example, access node) and receiver (for example, accessing terminal) can use STATUS PDU to pass on the RLC signaling information to its peer device.According to a scheme, can define the new SUFI 200 that can be used to pass on polling order.A kind of possibility form of poll SUFI 200 is shown in Figure 3, and it is included in the data field that the type that comprises in the status PDU is set to equal " poll ".

When the needs poll, transmitter is created the STATUS PDU that comprises poll SUFI 200, and this poll SUFI 200 is the example shown in Fig. 3 for example.The STATUS PDU that comprises poll SUFI 200 comprises the highest serial number that is sent alternatively, obtainable information when being in the standby condition report with the maximization receiver.Alternatively, can define new SUFI, to carry the highest serial number that is sent discretely with poll SUFI.

Use the poll of poll pdu.RLC can define various packet formats, wherein, these packet formats are the forms that are used to carry user data, and this user data is the reset RESET PDU of receiver of RLC Ack (affirmation) pattern PDU (AMD PDU), RLC UnAck (unconfirmed) pattern PDU (UMD PDU), STATUS message defined above or be used to for example.

According to another program, can define new RLC PDU data structure and pass on polling order.A kind of possible form of poll pdu is as illustrating especially among Fig. 4, is initial with the data in first eight bit byte or control (D/C) position 212 and PDU type field 214.Alternatively, poll pdu 210 can be included in the highest serial number field of describing in second eight bit byte of being launched 216, to maximize in the obtainable information in receiver place.Can comprise that filling field 218 in the eight bit byte subsequently is to keep the length of PDU 210.If there is the D/C position, then indication control.If there is the PDU type field, then indicate poll.The existence of highest serial number is optionally, and can indicate it to be comprised with a position.

Using length is the poll of zero RLC AMD PDU.Replace or additionally utilizing such as poll pdu 210 such control data structures, the quilt that RLC AMD PDU form can be suitable for realizing not comprising data is the AMD PDU 230 of segmentation again.Be called AM data (AMD) from more high-rise data message.Fig. 5 has described the illustrative general format of AMD PDU 230, and it has: D/C position 232 in first eight bit byte and sequence-number field 234; It is the length indicator fields 242 of 2 HE fields 240 of header information (LI) or data and the 3rd eight bit byte and to be used to indicate next eight bit byte be 1 E (expansion) field of head or data that sequence-number field 236, poll bit 238 in second eight bit byte and being used for indicated next eight bit byte.

If the highest serial number of emission is N, can be that poll bit on 0 the RLC AMDPDU 210 is set to " 1 " and sends polling order to receiver then by payload length.Can be set to " 0 " by length indicator.The PDU that receiver will have remainder certificate and poll bit setting is interpreted as polling order, and the PDU that can not attempt to receive is stored in its reception buffer.Depend on concrete semanteme, can be set to N+1 or N+d (wherein d is an integer), indicate highest serial number and polling order by the sequence number among the PDU.

Yet, should be appreciated that and can revise the reception that the receiver process is handled above-mentioned empty AMD PDU.

The solution of the present invention can relate to the system of Radio Link control (RLC) protocol specification of having realized any version, and these standards include but not limited to: the 7th edition 3GPP TS 25.322V7.2.0 (2006-09) and set of specifications wireless access network; Evolved general land wireless access (E-UTRA) and Evolved UTRAN (E-UTRAN); General description; Second stage (the 8th edition) 3GPP TS 36.300.Yet, should be appreciated that these schemes can be applied to the network of other types.

Should be appreciated that wireless communication system by widespread deployment so that various Content of Communication, for example voice, data etc. to be provided.These systems can support the multi-address system that communicates with a plurality of users by sharing free system resources (for example, bandwidth and through-put power).The example of these multi-address systems comprises code division multiple access (CDMA) system, time division multiple access (TDMA) system, frequency division multiple access (FDMA) system and OFDM (OFDMA) system.

Usually, wireless multiple-access communication system can be supported the communication of a plurality of wireless access terminals simultaneously.Each terminal communicates by transmission on forward link and the reverse link and one or more base station.Forward link (or down link) is meant the communication link from the base station to the terminal, and reverse link (or up link) is meant the communication link from terminal to base station.This communication link can be by singly going into singly to go out system (SISO), going into singly to go out system or multiple-input, multiple-output (" MIMO ") system sets up more.

Mimo system adopts a plurality of (N _TIndividual) transmitting antenna and a plurality of (N _RIndividual) reception antenna carries out transfer of data.By N _TIndividual transmitting antenna and N _RThe mimo channel that individual reception antenna forms can be broken down into N _SThe individual independent channel that is also referred to as space channel, wherein N _S≤ min{N _T, N _R.N _SEach of individual independent channel is corresponding to a dimension.If the additional dimension that a plurality of transmitting antennas and reception antenna are created is used, then mimo system can provide the performance (for example, higher throughput and/or higher reliability) of improvement.

Mimo system is supported time division duplex (TDD) and Frequency Division Duplexing (FDD) (FDD) system.In the TDD system, forward link transmissions is carried out on identical frequency field with rl transmission, thereby principle of reciprocity allows from the reverse link channel estimation forward link channel.This makes that but this access point can extract the transmit beamforming gain on the forward link when at the access point place there being a plurality of antenna time spent.

Referring to Fig. 6, the multi-address radio communication system according to a scheme has been described.Access point 300 (AP) comprises a plurality of antenna sets, and an antenna sets comprises

antenna

304 and 306, and another antenna sets comprises

antenna

308 and 310, and another antenna sets comprises antenna 312 and 314.In Fig. 6, only show two antennas for each antenna sets, still,, can utilize more or less antenna for each antenna sets.316 (AT) that access terminal are communicating with

antenna

312 and 314, and wherein,

antenna

312 and 314 is transmitted to information on forward link 320 and accesses terminal 316, and on reverse link 318 from the 316 reception information that access terminal.Accessing terminal 322 is communicating with

antenna

306 and 308, and wherein,

antenna

306 and 308 is transmitted to information on forward link 326 and accesses terminal 322, and on reverse link 324 from the 322 reception information that access terminal.Communication link 318,320,324 and 326 can use different frequencies to communicate in the FDD system.For example, forward link 320 can use and the different frequency of reverse link 318 employed frequencies.

The zone that every group of antenna and/or they are designed to communicate therein is commonly called the sector of access point.In this scheme, each antenna sets is designed to accessing terminal in the sector in the zone that covers with access point 300 and communicates.

That carries out on

forward link

320 and 326 communicates by letter, and the transmitting antenna of access point 300 utilizes beam shaping, is used for the access terminal signal to noise ratio of 316 and 324 forward link of difference with raising.In addition, with access point by individual antenna to it all situations of launching that access terminal compare, access point uses beam shaping accessing terminal of random scatter in its coverage to launch, and can cause littler interference to accessing terminal in the neighbor cell.

Access point can be to be used for the fixed station that communicates with terminal, and also can be called as access point, Node B or some other terms.Access terminal also can be called as and access terminal, user's set (UE), Wireless Telecom Equipment, terminal, access terminal or some other terms.

Fig. 7 is the block diagram of the scheme of transmitter system 410 (being also referred to as access point) in the mimo system 400 and receiver system 450 (be also referred to as and access terminal).At transmitter system 410 places, the business datum of a plurality of data flow is provided to emission (TX) data processor 414 from data source 412.

In a scheme, each data flow is launched on transmitting antenna separately.TX data processor 414 is based upon specific coding scheme that data flow selects the business datum of each data flow is formatd, encodes and interweaves, so that coded data to be provided.

Can use the OFDM technology to carry out the coded data and the pilot data of each data flow multiplexing.Typically, pilot data is the known data patterns of handling in a known way, and can be used to estimate channel response at the receiver system place.The certain modulation schemes (for example, BPSK, QPSK, M-PSK or M-QAM) that can be based upon each data flow selection is modulated the multiplexing pilot tone and the coded data of this data flow, so that modulation symbol to be provided.Can determine data rate, coding and the modulation of each data flow by processor 430 performed instructions.

Then, the modulation symbol of all data flow can be offered TX MIMO processor 420, it can further handle modulation symbol (for example, being used for OFDM).Then, TX MIMO processor 420 is with N _TIndividual stream of modulation symbols offers N _TIndividual transmitter (TMTR) 422a is to 422t.In some implementations, TX MIMO processor 420 antenna that the beam shaping weight is applied to the symbol of data flow and launches this symbol.

Each transmitter 422 reception and processing symbols streams separately are to provide one or more analog signals, and the step of going forward side by side joint (for example, amplification, filtering and up-conversion) this analog signal is to provide the modulation signal that is suitable for transmitting on mimo channel.Then, from N _TIndividual antenna 424a launches the N to 422t from transmitter 422a respectively to 424t _TIndividual modulation signal.

At receiver system 450 places, pass through N _RIndividual antenna 452a receives the modulation signal launched to 452r, and will offer separately receiver (RCVR) 454a from the signal that each antenna 452 receives to 454r.Signal after each receiver 454 is regulated signal, digitlization that (for example, filtering, amplification and down-conversion) receive separately and regulated to be providing sampling, and further handles these samplings so that corresponding " receiving " symbols streams to be provided.

Then, RX data processor 460 receives and handles from N based on specific receiver treatment technology _RThe N of individual receiver 454 _RThe individual symbols streams that receives is to provide N _TIndividual " detected " symbols streams.Then, RX data processor 460 can carry out demodulation, deinterleaving and decoding to each detected symbols streams, with the business datum of restore data stream.The processing of being undertaken by RX data processor 460 is the anti-processing in the performed processing of the transmitter system 410 TX MIMO of place processors 420 and TX data processor 414.

Processor 470 determines to use which pre-coding matrix (discussing below) termly.Processor 470 establishments comprise the reverse link message of matrix index part and order value part.

Reverse link message can comprise the various types of information about communication link and/or the data flow that receives.Reverse link message can be handled by TX data processor 438, be modulated, regulated to 454r by transmitter 454a by modulator 480, and be launched and postback transmitter system 410, described TX data processor 438 also receives the business datum of a plurality of data flow from data source 436.

At transmitter system 410 places, modulation signal from receiver system 450 is received, is regulated, carried out demodulation by demodulator 440 by receiver 422 by antenna 424, and handle by RX data processor 442, to extract the reverse link message of receiver system 450 emissions.Then, processor 430 determines which pre-coding matrix is used for determining the beam shaping weight, then, handles the message of extracting.

In a scheme, logic channel is divided into control channel and Traffic Channel.Logical control channel comprises: Broadcast Control Channel (BCCH), and it is the DL channel that is used for the broadcast system control information; Paging Control Channel (PCCH), it is the DL channel that transmits paging information; Multicast control channel (MCCH), it is to be used at one or several MTCH transmitting multimedia broadcasts and multicast service (MBMS) the scheduling point-to-multipoint DL channel with control information.Usually, after setting up the RRC connection, the UE that this channel only is received MBMS (note: the past is MCCH+MSCH) uses.Dedicated Control Channel (DCCH) is the point-to-point two-way channel of transmission dedicated control information, and is had the UE use that RRC connects.In a scheme, the logic business channel comprises: Dedicated Traffic Channel (DTCH), it is to be that a UE carries out the point-to-point two-way channel that user profile transmits specially.In addition, the multicast service channel (MTCH) that is used for point-to-multipoint DL channel is used for service data transmission.

In a scheme, transmission channel (Transport Channel) is divided into DL and UL.The DL transmission channel comprises broadcast channel (BCH), downlink shared data channel (DL-SDCH) and paging channel (PCH), PCH is used to support UE energy-conservation (indicating DRX cycle to UE by network), and it is broadcasted and is mapped to the PHY resource that can be used for other control/Traffic Channels in whole sub-district.The UL transmission channel comprises RACH (RACH), request channel (REQCH), up link shared data channel (UL-SDCH) and a plurality of PHY channel.The PHY channel comprises one group of DL channel and UL channel.

DL PHY channel comprises: Common Pilot Channel (CPICH); Synchronizing channel (SCH); Common Control Channel (CCCH); Share DL control channel (SDCCH); Multicast control channel (MCCH); Share UL allocated channel (SUACH); Acknowledgement channel (ACKCH); DL physics shared data channel (DL-PSDCH); UL power control channel (UPCCH); Page Indication Channel (PICH); Load indicating channel (LICH).UL PHY channel comprises: physical accidental access channel (PRACH); Channel quality indicating channel (CQICH); Acknowledgement channel (ACKCH); Antenna subset indicating channel (ASICH); Sharing request channel (SREQCH); UL physics shared data channel (UL-PSDCH); Broadcast pilot channel (BPICH).

In Fig. 8, transmitter 500 comprises the unit that is depicted as module 502, is used to launch a plurality of RLCPDU.Transmitter 500 comprises the unit that is depicted as module 504, is used to keep transmitter window.Transmitter 500 comprises the unit that is depicted as module 506, is used for from receiver accepting state PDU.Transmitter 500 comprises the unit that is depicted as function 510, is used to monitor poll event, and function 510 comprises one or more in three illustrative modules.At first, provide module 512 to detect empty transmitter window.The second, provide module 514 to come RLC PDU or the uncompleted byte of RLC counted with detection and reach a threshold value.The 3rd, for the poll timer provides module 516.Reflector 500 comprises the function 518 that is used to create polling order, and it comprises one or more in three illustrative modules.At first, the poll superwood section (SUFI) that provides module 520 to launch to be incorporated in the status PDU.The second, provide module 522 to launch poll pdu RLC order.The 3rd, providing module 524 to launch does not have data and has the RLC PDU that poll bit is provided with.

In Fig. 9, receiver 600 comprises the unit that is depicted as module 602, is used to receive a plurality of RLCPDU.Receiver 600 comprises the unit that is depicted as module 604, is used to keep receiver window.Receiver 600 comprises the unit that is depicted as module 606, is used for coming transmit status PDU in response to polling order.

Receiver 600 comprises that the RLC PDU that is used for not having data and to have a poll bit setting is interpreted as the unit of polling order, and does not change its reception buffer when receiving.

Content described above comprises the example of various schemes.Certainly,, can not describe the every kind of combination that can envision of parts or method, still, those skilled in the art will realize that many further combinations and permutations are possible in order to describe these schemes.Therefore, this subject specification is intended to comprise all this type of replacement, the modifications and variations in the spirit and scope that fall into appended claims.

Especially and the various functions of carrying out for above-mentioned parts, equipment, circuit, system etc., unless otherwise instructed, otherwise, term (comprising quoting " the unit ") intention that is used to describe these parts corresponding to any parts of the appointed function of carrying out described parts (for example, the parts of functional equivalent), even it structurally is not equal to the structure of the function of the disclosed exemplary arrangement that is used for carrying out this paper explanation.In this regard, will recognize also that various schemes comprise and be used to carry out the operation of the whole bag of tricks and/or the system of incident, and the computer-readable medium with computer executable instructions of the operation that is used to carry out the whole bag of tricks and/or incident.

In addition, although a kind of special characteristic that discloses in may be only realizing with reference to several, this feature can make up with one or more other features that for any given or application-specific are other realizations expectation or favourable.With regard to be used for describing in detail or the term of claims " comprises " and the scope of variant with regard to, these terms are intended to as inclusive, its mode is similar to term and " comprises ".In addition, describe in detail or claims in use term " or " meaning is " nonexcludability or ".

In addition, should recognize, the each several part of disclosed system and method can comprise or comprise parts, subassembly, process, unit, method or mechanism (for example, SVMs, neural net, expert system, bayesian belief networks, fuzzy logic, data fusion engines, the grader based on artificial intelligence, machine learning or knowledge or rule ...).These parts and other parts can carry out performed specific mechanism or processing automatically, make the part self adaptation more of system and method thus, and efficient and intelligent.As an example and unrestricted, transmitter (for example, access node) can infer or prediction data channel and receiver (for example, access terminal) ability, thereby dispatch poll event, and based on the type of selecting polling order alternately of under conditions of similarity, carrying out before with identical or similar machine in mode efficiently.

In view of above-described example system, with reference to several flow chart description the method that can realize according to disclosure theme.Although these methods are illustrated and are described as a series of square frames for simplifying the purpose of explaining; but should be appreciated that and recognize; theme required for protection is not subjected to the restriction of the order of these square frames, and some square frames can be with different the occurring in sequence and/or take place simultaneously with other square frame of the order of describing with this paper and describe.In addition, may not need the square frame of all explanations to realize method described herein.In addition, should also be appreciated that method disclosed herein can be stored on the goods, so that computer is transported and sent to these methods.Term as used herein " goods " is intended to comprise can be from the computer program of any computer readable device, carrier or medium access.

Be to be appreciated that, described any patent, publication or other the open materials of incorporating this paper by reference into, going up in whole or in part, only with in the disclosure be not merged in this paper in existing definition, statement or the afoul scope of other open materials set forth at these materials of incorporating into.Like this, and in the scope of needs, this paper the open replacement of clearly setting forth incorporate the material of any conflict of this paper by reference into.The described this paper that incorporates into by reference, but existing definition, statement or the afoul any material of other open materials or its part set forth with this paper, with only be incorporated into incorporating into material with the existing scope that does not clash between the material that discloses.

Claims

1, a kind of being used for carried out the method for reliable transmission to remote receiver reducing under the situation of transfer of data from local transmitter, comprising:

The Radio Link control command is sent to remote receiver from local transmitter;

In response to detecting poll event, under the situation of the transmission that does not need user plane data, send polling order; And

Accepting state PDU.

2, according to the process of claim 1 wherein, send described polling order and also comprise:

Definition status PDU, this status PDU is the flexible container that comprises the superwood section, described superwood section is used for sending control information to peer-to-peer;

Wherein, this status PDU comprises the superwood section of indicating described polling order.

3, method according to claim 2, wherein, the described superwood section that is used to send polling message is also notified the sequence number that is sent by described local transmitter.

4, method according to claim 2, wherein, the described superwood section that is used to send polling message is also notified the highest serial number that is sent by described local transmitter.

5, method according to claim 1 wherein, sends described polling order and also comprises poll pdu is defined as the control channel item.

6, method according to claim 5, wherein, described poll pdu is also notified the sequence number that is sent by described local transmitter.

7, method according to claim 5, wherein, described poll pdu is also notified the highest serial number that is sent by described local transmitter.

8, method according to claim 1 wherein, sends described polling order and also comprises using to have the PDU that length is zero data.

9, method according to claim 8 also comprises:

Transmission has the head PDU partly that length is zero data and the PDU that sends before, to eliminate data content in fact; And

The poll bit that described PDU is set is indicated polling order.

10, method according to claim 8 wherein, sends and to have the PDU that length is zero data, and the sequence number of the described PDU sequence number that is set to send.

11, method according to claim 8 wherein, sends and to have the PDU that length is zero data, and the sequence number of the described PDU highest serial number that is set to send.

12, method according to claim 8 wherein, sends and to have the PDU that length is zero data, and the highest serial number that the sequence number of described PDU is set to send adds 1.

13, method according to claim 8, wherein, the transmission that has polling order and length and be the described PDU of zero data does not influence the state of reception buffer, but triggers the buffer state reports at all sequences relevant with the indication that provides among the described RLC PDU with polling order number.

14, method according to claim 8, wherein, described polling order and described length are the state that the transmission of zero data does not influence described reception buffer.

15, method according to claim 1 wherein, sends RLC PDU and conforms to high-speed packet access evolution (HSPA) agreement.

16, method according to claim 1 wherein, sends RLC PDU and conforms to third generation partner program Long Term Evolution (3GPP LTE) agreement.

17, at least one is used for carrying out the processor of reliable transmission to remote receiver reducing under the situation of redundant data transmissions from local transmitter, comprising:

First module is used for Radio link commands is sent to remote receiver from local transmitter;

Second module is used for sending polling order in response to detecting poll event under the situation of the transmission that does not need user plane data; And

Three module is used for accepting state PDU.

18, a kind of being used for carried out the computer program of reliable transmission to remote receiver reducing under the situation of redundant data transmissions from local transmitter, comprising:

Computer-readable medium comprises:

First generation code character is used to make that computer sends to remote receiver with Radio link commands from local transmitter;

Second generation code character is used to make described computer in response to detecting poll event, sends polling order under the situation of the transmission that does not need user plane data; And

Third generation code character is used to make described computer accepting state PDU.

19, a kind of being used for carried out the device of reliable transmission to remote receiver reducing under the situation of redundant data transmissions from local transmitter, comprising:

The Radio link commands transmitting element is used for Radio link commands is sent to remote receiver from local transmitter;

The polling order transmitting element is used for sending polling order in response to detecting poll event under the situation of the transmission that does not need user plane data; And

Receiving element is used for accepting state PDU.

20, a kind of being used for carried out the device of reliable transmission to remote receiver reducing under the situation of redundant data transmissions from local transmitter, comprising:

Memory;

Local transmitter is used for the Radio link commands that described memory comprises is sent to remote receiver;

The poll parts are used for generating polling order and making described local transmitter send this polling order under the situation of the transmission that does not need user plane data in response to detecting poll event; And

Local receiver is used for from described remote receiver accepting state PDU.

21, device according to claim 20, wherein, described poll parts definition status PDU, this status PDU is the flexible container that comprises the superwood section, described superwood section is used for sending signaling information to peer-entities,

Wherein, described polling order comprises the poll superwood section of described status PDU.

22, device according to claim 21, wherein, the described superwood section that is used to send polling message is also notified the sequence number that is sent by described local transmitter.

23, device according to claim 21, wherein, the described superwood section that is used to send polling message is also notified the highest serial number that is sent by described local transmitter.

24, device according to claim 20, wherein, described poll parts are defined as the control channel item with poll pdu, access terminal solicited status PDU to be transferred to from access node.

25, device according to claim 24, wherein, described poll pdu is also notified the sequence number that is sent by described local transmitter.

26, device according to claim 24, wherein, described poll pdu is also notified the highest serial number that is sent by described local transmitter.

27, device according to claim 20, wherein, described poll parts also are used for: define elongated PDU, cut apart the PDU that sent again eliminating data content in fact, and the poll bit of the described PDU of cutting apart again is set.

28, device according to claim 27 also comprises:

The poll bit that described PDU is set is indicated polling order.

29, device according to claim 27 wherein, sends and to have the PDU that length is zero data, and the sequence number of the described PDU sequence number that is set to send.

30, device according to claim 27 wherein, sends and to have the PDU that length is zero data, and the sequence number of the described PDU highest serial number that is set to send.

31, device according to claim 27 wherein, sends and to have the PDU that length is zero data, and the highest serial number that the sequence number of described PDU is set to send adds 1.

32, device according to claim 27, wherein, described poll parts also are used for: the sequence number of PDU is set to next available sequences number.

33, device according to claim 27, wherein, described poll parts also are used for: the polling order and the length that send the state that does not influence reception buffer are zero data.

34, device according to claim 20, wherein, described local transmitter also is used for: send and conform to the PDU that high-speed packet inserts evolution (HSPA+) agreement.

35, device according to claim 20, wherein, described local transmitter also is used for: send the PDU that conforms to third generation partner program Long Term Evolution (3GPP LTE) agreement.

36, a kind of method that is used for carrying out the reliable reception from the distance transmitter to the local receiver under the situation of the reception that reduces redundant data comprises:

The Radio link commands of reception from the distance transmitter to the local receiver;

Detect poll event in response to access node, under the situation of the transmission that does not need user plane data, receive polling order; And

Come transmit status PDU based on signaling information.

37, method according to claim 36 wherein, receives described polling order and also comprises:

Accepting state PDU, this status PDU is to be defined as the flexible container that comprises the superwood section, described superwood section is used for sending signaling information to peer-entities,

Wherein, described polling order comprises the poll superwood section of this status PDU.

38, according to the described method of claim 37, wherein, the described superwood section that is used to send polling message is also notified the sequence number that is sent by described local transmitter.

39, according to the described method of claim 37, wherein, the described superwood section that is used to send polling message is also notified the highest serial number that is sent by described local transmitter.

40, method according to claim 36 wherein, receives described polling order and also comprises: receive poll pdu, described poll pdu is defined as the control channel item, accesses terminal solicited status PDU to be transferred to from access node.

41, according to the described method of claim 40, wherein, described poll pdu is also notified the sequence number that is sent by described local transmitter.

42, according to the described method of claim 40, wherein, described poll pdu is also notified the highest serial number that is sent by described local transmitter.

43, method according to claim 36 wherein, receives described polling order and also comprises:

Receive elongated PDU, described elongated PDU has been cut apart eliminating data content in fact again, and has been presented the poll bit of setting.

44, according to the described method of claim 43, also comprise:

The poll bit that described PDU is set is indicated polling order.

45, according to the described method of claim 43, wherein, send and to have the PDU that length is zero data, and the sequence number of the described PDU sequence number that is set to send.

46, according to the described method of claim 43, wherein, send and to have the PDU that length is zero data, and the sequence number of the described PDU highest serial number that is set to send.

47,, wherein, send and to have the PDU that length is zero data, and the highest serial number that the sequence number of described PDU is set to send adds 1 according to the described method of claim 43.

48, according to the described method of claim 43, also comprise: detect as having the remainder and be set to the polling order of the PDU of next available sequences number according to length and sequence number.

49, according to the described method of claim 43, wherein, described polling order and length are the state that the transmission of zero data does not influence reception buffer.

50, method according to claim 36 wherein, receives PDU and conforms to high-speed packet access evolution (HSPA+) agreement.

51, method according to claim 36 wherein, receives PDU and conforms to third generation partner program Long Term Evolution (3GPP LTE) agreement.

52, at least one is used for carrying out comprising from the processor of the reliable reception of transmitted from transmitter to receiver under the situation of the reception that reduces redundant data:

First module is used to receive the Radio link commands from transmitted from transmitter to receiver;

Second module is used for detecting poll event in response to access node, receives polling order under the situation of the transmission that does not need user plane data; And

Three module is used for coming transmit status PDU based on signaling information.

53, a kind of being used for carries out comprising from the computer program of the reliable reception of transmitted from transmitter to receiver under the situation of the reception that reduces redundant data:

Computer-readable medium comprises:

First generation code character is used to make that computer receives the Radio link commands from transmitted from transmitter to receiver;

Second generation code character is used to make described computer to detect poll event in response to access node, receives polling order under the situation of the transmission that does not need user plane data; And

Third generation code character is used to make described computer based to come transmit status PDU in signaling information.

54, a kind of being used for carries out comprising from the device of the reliable reception of transmitted from transmitter to receiver under the situation of the reception that reduces redundant data:

The Radio link commands receiving element is used to receive the Radio link commands from transmitted from transmitter to receiver;

The polling order receiving element is used for detecting poll event in response to access node, receives polling order under the situation of the transmission that does not need user plane data; And

Transmitting element is used for coming transmit status PDU based on signaling information.

55, a kind of device that is used for carrying out the reliable reception from the distance transmitter to the receiver under the situation of the reception that reduces redundant data comprises:

Memory;

Receiver is used for receiving Radio link commands from distance transmitter, so that it is stored in the described memory, and is used for receiving polling order under the situation of the transmission that does not need user plane data;

Local transmitter; And

Status component is used in response to described polling order, generates status PDU and makes described local transmitter send described status PDU;

Local receiver is used for from the accepting state PDU that accesses terminal.

56, according to the described device of claim 55, wherein, described local receiver is used for: receive the polling order that also comprises status PDU, this status PDU is to be defined as the flexible container that comprises the superwood section, described superwood section is used for sending signaling information to peer-entities, wherein, described polling order comprises the poll superwood section of this status PDU.

57, according to the described device of claim 56, wherein, the described superwood section that is used to send polling message is also notified the sequence number that is sent by described local transmitter.

58, according to the described device of claim 56, wherein, the described superwood section that is used to send polling message is also notified the highest serial number that is sent by described local transmitter.

59, according to the described device of claim 55, wherein, described local receiver is used to receive the polling order that also comprises poll pdu, and described poll pdu is defined as the control channel item, accesses terminal solicited status PDU to be transferred to from access node.

60, according to the described device of claim 59, wherein, described poll pdu is also notified the sequence number that is sent by described local transmitter.

61, according to the described device of claim 59, wherein, described poll pdu is also notified the highest serial number that is sent by described local transmitter.

62, according to the described device of claim 55, wherein, described local receiver is used to receive the polling order that also comprises elongated PDU, and described elongated PDU has been cut apart eliminating data content in fact again, and has been presented the poll bit of setting.

63, according to the described device of claim 62, also comprise:

The poll bit that described PDU is set is indicated polling order.

64, according to the described device of claim 62, wherein, send and to have the PDU that length is zero data, and the sequence number of the described PDU sequence number that is set to send.

65, according to the described device of claim 62, wherein, send and to have the PDU that length is zero data, and the sequence number of the described PDU highest serial number that is set to send.

66,, wherein, send and to have the PDU that length is zero data, and the highest serial number that the sequence number of described PDU is set to send adds 1 according to the described device of claim 62.

67, according to the described device of claim 62, wherein, described status component detects as having the remainder and is set to the polling order of the PDU of next available sequences number according to length and sequence number.

68, according to the described device of claim 62, wherein, described status component detects polling order and length is zero data, and does not change the state of reception buffer.

69, according to the described device of claim 55, wherein, described local receiver is used for receiving the PDU that conforms to high-speed packet access evolution (HSPA+) agreement.

70, according to the described device of claim 55, wherein, described local receiver is used for receiving the PDU that conforms to third generation partner program Long Term Evolution (3GPP LTE) agreement.