CN101061649A - Efficient partitioning of control and data field - Google Patents

Abstract

Embodiments describe efficient tradeoff of latencies with processing times. A single control field can be placed within a frame to tradeoff encoding time with decoding time. Alternatively, a control field can be split into two portions to achieve good latency performance while maintaining sufficient processing time for scheduling, encoding and decoding. In accordance with some embodiments, a ACK/NACK field on one hop can serve the dual purpose of being a request for resources on the next hop in a multi-hop system. Also described is implicit acknowledgment monitoring that can improve latency performance.

Description

The efficient division of control field and data field

The cross reference of related application

[0001] the application requires to enjoy that on November 16th, 2005 submitted to, the exercise question U.S. Provisional Application No.60/737 for " PARTITIONING OF CONTROL AND DATAFIELDS ", 688 priority, provisional application No.60/737,688 incorporate the application into way of reference in full.

Invention field

[0002] put it briefly, following description relates to communication system, and specifically, following description relates to the communication in the multi-hop wireless network.

Technical background

[0003] no matter where the user may be in (for example, indoor or outdoor), also moves still inactive state, all can utilize communication network to transmit information no matter this user is in.Usually, communicate by mobile device and base station or access point and set up cordless communication network.Access point covers certain geographic range or sub-district, and when the operation mobile device, mobile device may move into or leave these geographic cell.In order to realize being close to unbroken communication, when mobile device enters a certain sub-district, distribute the resource of this sub-district, and after mobile device leaves this sub-district, no longer distribute local resource to it to it.

[0004] in the multi-hop topological structure, will communicate by letter or transmission information is delivered to access point with public network (for example, the Internet) or private network wired connection by the many wireless jumpings or the network segment.Total time-delay all is one of the factor that should consider for whole communication path (for example, from the source end to the destination), and be not limited only to nearest one jump during.When the control field that is arranged in the single position that a time slot begins was used for request and/or give resource and confirm transmission, this control field may increase delay.In the time of in being used in multi-hop wireless network, this problem can be more outstanding.

Summary of the invention

[0005] Xia Mian summary provides basic understanding at some aspect of the disclosed embodiments.This summary is not comprehensive narration, and is not used in the part of distinguishing important or crucial, is not used in the scope that defines these embodiment yet.Its sole purpose is to introduce some aspect of described embodiment briefly, with the prelude as the more detailed description of introducing later.

[0006] according to one or more embodiment and corresponding disclosure thereof, various aspects are described in the control in the frame and the division of data field.The control in the frame and the suitable division of data field realize simultaneously efficiently that for the minimum time-delay of guaranteeing transfer of data the processing time is extremely important.

[0007] according to an embodiment, provides a kind of data transmission method.This method comprises: determine the time dividing condition between scramble time and the decode time, and part is provided with control field selectively based on determined time dividing condition in data transmission frames.According to some embodiment, this method also comprises: if required decode time is longer than the scramble time, then control field is arranged on right side, time slot center, perhaps, if required decode time is shorter than the scramble time, then control field is arranged on the time slot center left.Except encoding at the transmitter place and decoding at the receiver place, processing be to allow dispatch list determine and give resource and should give how many resources to which transmitter if having time on the other hand.The method of dividing control field provides additional flexibility, realizing scheduling time as much as possible, and does not increase frame or time slot duration.

[0008], provides a kind of device that is used for data communication according to some embodiment.This device can comprise: the time is divided module, and it determines the time dividing condition between scramble time and the decode time.This device can also comprise that time slot is provided with module, and it determines the setting of the control field in the frame.In certain embodiments, this device can also comprise recessive request monitor, and it monitors the ACK/NACK field from sending node, and this ACK/NACK field is considered as resource request.

[0009] some embodiment comprises the computer-readable medium of realizing data communications method.This method comprises: determine the time dividing condition between scramble time and the decode time, and, at least a portion control field is arranged on the selectivity position of Frame, to realize the dividing condition of fixing time really between scramble time and the decode time.

[0010] according to some embodiment, a kind of processor is used to carry out the data communication instruction.This processor can be used to select the time dividing condition between scramble time and the decode time, and part is provided with control field in the data transmission frames based on the times selected dividing condition.

[0011] according to some embodiment, a kind of device comprises: be used for determining the module of scramble time and decode time dividing condition, and, be used for part is provided with the control field in the frame based on the dividing condition of determining between scramble time and the decode time module.This device can also comprise: be used for control field is divided into two sections module; Be used for comprising selectively the module of estimating request; And ACK and with the module of this ACK as the implicit resource request is used to decode.

[0012] in order to address relevant purpose on realizing, the feature of fully describing below one or more embodiment comprise of particularly emphaticallying point out at claims.Below description and accompanying drawing elaborated some exemplary aspect, and show the certain methods of the principle that can be used to realize these embodiment.According to the detailed description that provides below in conjunction with accompanying drawing, other advantage and novel feature will become apparent, and the disclosed embodiments are intended to comprise all these methods and equivalent thereof.

Description of drawings

[0013] Fig. 1 is the schematic diagram according to the multi-hop communication system of various embodiment disclosed herein.

[0014] Fig. 2 shows the system that is used for the information that transmits at multi-hop communication system.

[0015] Fig. 3 shows another embodiment of the system of the data field that is used for selective division control field and carries out transfer of data.

[0016] Fig. 4 shows and sends and the time of reception line.

[0017] Fig. 5 shows the setting according to the control field of one or more embodiment disclosed herein.

[0018] Fig. 6 shows the division setting according to the control field of various embodiment.

[0019] flow chart of Fig. 7 shows the method that is used for selectivity dividing data and control field.

[0020] flow chart of Fig. 8 shows the selective method that control field is set of single position set-up mode that adopts.

[0021] flow chart of Fig. 9 shows the method for designing of the division Position Control field of utilizing data communication.

[0022] Figure 10 shows the system according to coordinating communication between a plurality of communication protocols of one or more embodiment in wireless communications environment of introducing here.

[0023] Figure 11 shows the system according to various aspects coordinating communication in wireless communications environment.

[0024] Figure 12 shows the wireless communications environment that can adopt in conjunction with each system and method described herein.

[0025] Figure 13 shows the system that is used for dividing selectively at cordless communication network control and data field.

Embodiment

[0026] referring now to accompanying drawing each embodiment is described.In the following description,, enumerated a lot of concrete details, one or more embodiment have been reached thorough understanding so that realize for ease of explaining.But clearly, these embodiment also can realize without these details.In other example, known structure and equipment are that the form with block diagram provides, so that describe these embodiment.

[0027] terms such as employed in this application " parts ", " module ", " system " mean the entity relevant with computer, and it can be hardware, firmware, software and hardware combining, software or executory software.For example, parts can be but be not limited in: the thread of the process of moving on the processor, processor, object, executable program, execution, program and/or computer.For convenience of explanation, application program of moving on the computing equipment and computing equipment itself can be parts.An executory process and/or thread can have one or more parts, and parts can be on the computer and/or be distributed between two or more the computers.In addition, can carry out these parts from the multiple computer-readable medium of having stored plurality of data structures.These parts can be by this locality and/or remote process (for example, according to signal with one or more packets) communicate (as, from the data of parts in local system, in the distributed system and/or by being undertaken alternately by signal such as the network of the Internet etc. and the parts of other system).

[0028] in addition, in conjunction with subscriber equipment each embodiment has been described here.Subscriber equipment also can be called as system, subscriber unit, subscriber station, mobile radio station, mobile device, distant station, access point, base station, remote terminal, accesses terminal, wireless terminal, hand-held set, main frame, user terminal, terminal, user agent or user's set.Subscriber equipment can be that portable phone, cordless telephone, session initiation protocol (SIP) phone, wireless local loop (WLL) are stood, PDA, have the handheld device of wireless connections ability or other treatment facility that links to each other with radio modem.

[0029] in addition, various aspects described herein or feature can be implemented as the manufacture of method, device or use standard program and/or engineering.Term used herein " manufacture " means that comprise can be from the computer program of any computer readable device, carrier wave or media interviews.For example, computer-readable media can including but not limited to: magnetic storage apparatus is (for example, hard disk, flash memory disk, magnetic stripe etc.), CD (for example, CD (CD), digital multi-purpose CD (DVD) etc.) and flash memory device (for example, card, rod, secret key driving etc.).

[0030] around each embodiment of a kind of system introduction, this system can comprise many parts, module etc. below.Each system can comprise additional parts, module etc., and/or, all parts that also can not comprise among the figure being discussed, module etc.Also can use the combination of these methods.

[0031] in the following detailed description, can various aspects and embodiment be described round time division duplex (TDD).Yet these creative aspects can be applicable to the disclosed embodiments well, but those skilled in the art will recognize easily that these creative aspects are equally applicable to each other system.Correspondingly, only be intended to illustrate these creative aspects, be to be understood that there is very wide range of application these creative aspects with reference to TDD.

[0032] referring now to accompanying drawing, Fig. 1 is the schematic diagram according to the multi-hop communication system 100 of each embodiment disclosed herein.Access node 102,104,106,108,110 with 112 with tree structure link to each other (for example, wirelessly).As shown in the figure, access point 102 can be unique wired access point, for example, and can be wired to the Internet.But any or all other access point 104-112 can be wired.If necessary, access terminal and 114,116,118 and 120 communicate by a plurality of jumpings (for example, access node 104-112) and wired access node 102.When wired access node 102 initiates to point to the communication of the 114-120 that accesses terminal, set up forward link.When one or more 114-120 that access terminal initiate to point to the communication of wired access point 102, set up reverse link.Should be understood that, multi-hop wireless network can have than shown in and more manying or less jumping of describing, and different accessing terminal can have the jumping of varying number.

[0033] in the following detailed description, will describe the TDD system, wherein, logarithm reportedly is input into the row scheduling to receiver based on receiving request from transmitter.For convenience of explanation, should suppose that node does not does not transmit and receive simultaneously.In addition, for convenience of explanation, painted (Coloring) scheme or strategy will be discussed, wherein, different nodes be coated different colours, and, will be divided into coloured time slot the time.Node with the corresponding time slot of its color in send, and during the time slot of other color, intercept.Should be understood that, can utilize various other strategies to distinguish different nodes, and the color of usefulness is just to for simplicity here.

[0034] utilize double-colored strategy, access node 104 and 106 and terminal 116,118 and 120 are a kind of colors, as green.Wired access node 102, access node 108,110 and 112 and terminal 114 are second kind of color, as redness.Therefore, in this scheme, the node that has connected in tree-like is not used identical color and is represented.

[0035] in dispatching patcher, should only allow between opposite color, to transmit based on receiver.In this set, node is synchronous, and the time slot that replaces between two kinds of colors has fixed duration.Each time slot can be divided into control section and data segment.With the corresponding time slot of its color in, transmitter sends request with request resource to receiver.In the subsequent timeslot of opposite color, receiver is determined which user should send and is determined which resource (this task is commonly called scheduling).In next time slot, the transmitter that receives GRANT (allowance) sends to receiver with data, and whether receiver then will can be correctly decoded data and confirming (ACK) or denying that (NACK) sends to transmitter according to this receiver.In this embodiment, suppose that physical layer packet can be only just can enter next the jumping current jumping onto after being correctly decoded.

[0036] transfer of data in the system 100 can allow the selectivity of interior control of frame and data field to divide.This division can reduce time delay of data transmission, guarantees to have enough processing times to be used for transfer of data simultaneously.Optionally dividing to provide time delay of data transmission and trading off between the processing time according to the related parameter that has of transfer of data.These parameters can comprise available scheduling time, available decode time, packets available time (being also referred to as the scramble time) and/or to manage finish to the delay of retransmitting beginning (if grouping is not identified (NACK)), jump and postpone (i.e. emission finishes to jump the emission beginning to the next one) or required entangled object/HARQ channel (along with the increase of entangled object, handle and the complexity of signaling also increases) such as emission for the first time.

[0037] Fig. 2 shows the system 200 that is used for the information that transmits at multi-hop communication system.System 200 comprises wireless network 202, and is similar with above-mentioned wireless system 100, and wireless network 202 comprises sends out a transmitter 204 and a receiver 206.What will be appreciated that is that wireless network 202 can comprise many transmitters 204 and receiver 206, but for simplicity, only shows the individual transmitter 204 that the communication data signal is sent to single receiver 206.Transmitter 204 comprises encoder component 208, and it sends to receiver 206 with this signal then according to suitable wireless communication protocol (for example, OFDM, OFDMA, CDMA, TDMA, GSM, HSDPA etc.) modulation and/or coded data transmission.For example, encoder component 208 can be a source encoder channel encoder afterwards.Channel decoder can be based on the scheme such as traditional Turbo or low-density checksum (LDPC) coding.

[0038] receiver 206 comprises decoding parts 210, and it can be decoded to the transfer of data that receives.In case transfer of data is decoded successfully, confirm that (ACK) parts can generate the successful affirmation of expression transfer of data decoding, and send it to transmitter 204, be received and decode to inform transmitter 204 transfer of data, therefore do not need repeating transmission.ACK parts 212 can adopt the affirmation technology that combines with the ACK/NACK agreement.

[0039] decoding if transfer of data is not succeeded, affirmation parts 212 can further send denies (NACK).NACK can be sent to transmitter 204, inform transmitter 204 with the message that receiver 206 is not received and/or successful decoded data transmits.Therefore, if further send this data communication, then transmitter 204 can retransmission data transmission or its part.

[0040] receiver 206 can also comprise scheduler 214, and it can be used for the optimal scheduling of specified data transmission.Therefore, main processing time or delay (for example, coding, decoding and scheduling) can be realized by separated components.But according to some embodiment, one or more processing times are determined by identical parts, therefore, according to these embodiment, are not used three separated components.

[0041] according to some embodiment, receiver 206 can send to next receiver (not shown) with transfer of data according to similar process.Can repeat this process by any amount of jumping, till transfer of data reaches original recipient.

[0042] for example, node A may want communication is sent to Node B, it is forwarded to node C.If so, before Node B determined whether it has successfully received the grouping of node A, Node B usually can not be to node C request transmission.But, in some cases, in order to reduce delay, particularly, if know Node B the grouping of successful decode node A is had very high possibility, so, before Node B is finished the decoding from the grouping of node A, it can send request to node C, and this is called request (Anticipatory Request) in advance.But, should be understood that request in advance may cause the wasting of resources.For example, if node C gives the Node B resource, but Node B successfully do not decode from the grouping of node A, so, this wasting of resources situation can take place.

[0043] therefore, according to some embodiment, if utilize to divide control field is set, then receiver 206 can be intercepted the ACK that sends from forward termination, asks in advance avoiding.For example, transmitter 204 can have the reception data from another terminal (not shown), and wherein, these data will send to receiver 206.Only after transmitter 204 had successfully been decoded transmission from other terminal (not shown), transmitter 204 could be asked the resource from other terminal (not shown).But if receiver 206 listens to the ACK that transmitter 204 mails to other terminal (not shown), then receiver 206 can use this ACK recessively, to infer the resource request of transmitter 204.

[0044] in order to determine the suitable setting and/or the division of control field, the off-line design objective can be considered various standards.The off-line task can be carried out by the one or more design modules 216 in the network, and these modules use information to determine suitable setting and/or division.For example, can consider how slot time is divided between scramble time and decode time.Other standard comprises slowing down in advance asks, reduces retransmission delay etc.

[0045] example that is used for the control field parameter of different schemes can comprise that the duration is two milliseconds a frame.The control duration can be 0.2 millisecond, and protection can be 0.01 millisecond at interval.Be provided with for single position, starting point can be 0.75 times of slot length.For the division field with request/pilot field, starting point can be in the starting point of time slot.For example, pilot tone can be sent by transmitter, and can be used by receiver, so that make suitable allowance based on pilot quality.For the division field with allowance/ACK field, starting point can be 0.75 times of slot length.

[0046] notes, in following table, listed for the relevant treatment time of different schemes and the example of delay.Processing time and delay are in delicate." front " refers to the single time slot front that is arranged on of control field." " center " refers to the single time slot center that is arranged on of control field." division " refers to the control field branch is arranged, and " single Loc/Off " center " refers to single regional location.Should be understood that these times only are used for for the purpose of the explanation conveniently, and the disclosed embodiments are not limited to the listed time, in figure below, can utilize At All Other Times many.

	REQ/ permits automatically in advance
						The front	The center	Divide	Single position/away from the center
Available scheduling time	1.81	1.81	3.31	1.81
					Available " decoding " time	4.23	0.91	1.51	1.51
The available code time	2.01	0.91	0.31	0.31
The one Tx finishes to begin to Retx	6.24	2.02	2.02	2.02
					Jump and postpone: Tx finishes to jump Tx to the next one and begins	4.23	4.03	4.03	4.03
Required entangled object/HARQ Ch	2	1	1	1

Table 1

[0047] with reference to table 1, for dividing position and single position/leave the center, the summation in the processing time between the Code And Decode is identical.According to this position, for two kinds of designs, the division between scramble time and the decode time can change.Therefore, different with the center, can between Code And Decode, divide unequally.Usually, decode time is longer than the scramble time, therefore, divides position and single position/leave the center and has advantage than the center, because can suitably adjust the time.

[0048] one or more off-line design objectives or module 216 can comprise that the time divides module 218, its can be used for in the time slot the scramble time/the decode time optimization.For example, in some cases, decode time should be longer than the scramble time, and under other situation, should be arranged the long scramble time.Time is divided the optimum division that module 218 can be determined each time slot, so that control field to be set.

[0049] in addition, the time slot relevant with one or more off-line design objectives or module 216 is provided with module 220 and can be used for control field is arranged on optimum position in the time slot, thereby the scramble time/decode time of realizing ideal is compromise.According to some embodiment, time slot is provided with module 220 and also can be used for control field is divided into two sections, and each section is arranged on diverse location in the time slot.For example, if decode time should be longer than the scramble time, then single control field can be set to the right at time slot center.If the scramble time is should the ratio decoder time long, then time slot is provided with the left side that module can be set to control field the time slot center.

[0050] two section pattern length should be near the length of a time slot.For example, request and pilot tone can be located in a section of the control field of being divided, and can will permit and ACK/NACK is located in another section of the control field of being divided, time division module 220 can realize this set.

[0051] Fig. 3 shows the embodiment of the system 300 of the control field that is used for selectivity dividing data transmission and data field.System 300 comprises wireless network 302, and it is similar to the network of describing in conjunction with earlier drawings.Shown network 302 has individual transmitter 304 and single receiver 306, and still, system 300 also can adopt a plurality of transmitter and receivers.Transmitter 304 comprises encoder component 308, and it can be encoded to the signal of going out according to the modulation scheme that network 302 adopts.These signals can be received by receiver 306, and by decoder component 310 decodings.Confirm that (ACK) parts 312 generate and confirm, the decoding of succeeding of which packet that in signal, sends with indication or layer.If go wrong during received signal (for example, Cyclical Redundancy Check does not match), ACK parts 312 can generate denies (NACK).Receiver 306 also comprises scheduler 314, and it can be used for the suitable scheduling of specified data communication.

[0052] in certain embodiments, the recessiveness request monitor 316 that comprises in receiver 306 can be used for monitoring from sending node () ACK/NACK for example, transmitter 304, and the ACK/NACK field is considered as recessive resource request.Recessive request monitor 316 can monitor or intercept recessive request based on hearing the ACK that transmitter 304 sends.If detect ACK, receiver 306 can be considered as ACK recessive resource request.The ACK that the node of elder generation in the skip before sends can ask monitor 304 to be decoded by recessiveness, and the node in the first skip before is with the ACK that the decoded resource request as recessiveness.For example, three nodes (A, B and C) are arranged, and A wants to send data by B to C.At first, B should suitably receive the data of A, and will send to A to negative ACK.C can hear this ACK, and recessive ground with it as resource request from B.Utilize recessive request monitor 316 can reduce the additional request field that in second section of control field, comprises.

[0053] transmitter 304, receiver 306 or the two can include, but are not limited to the Communications Interface Assembly such as serial port, USB (USB), parallel port and wired and/or air interface parts, to realize communication protocol/standard, for example, World Interoperability for Microwave Access, WiMax (WiMAX), infrared protocol, short-range wireless protocol/technology, bluetooth such as Infrared Data Association (IrDA) ^@Technology, the ZigBeeB agreement, ultra broadband (UWB) agreement, home radio (HomeRF), share WAP (wireless access protocol) (SWAP), broadband technology such as wireless ethernet compatibility alliance (WECA), Wireless Fidelity alliance (Wi-Fi Alliance), 802.11 network technology, the PSTN technology, isomery communication network technology such as the Internet, the private wireless communication network, the land mobile wireless network, code division multiple access (CDMA), Wideband Code Division Multiple Access (WCDMA) (WCDMA), universal mobile telecommunications system (UMTS), Advanced Mobile Phone Service (AMPS), time division multiple access (TDMA), frequency division multiple access (FDMA), OFDM (OFDMA), global system for mobile communications (GSM), single carrier (1X) Radio Transmission Technology (RTT), evolution clear data (EV-DO) technology, GPRS (GPRS), high-performance data gsm environment (EDGE), high-speed down data divides group access (HSPDA), analog-and digital-satellite system and can be used on cordless communication network and data communication network in any other technique/protocol in one of at least.

[0054] one or more design modules 318 can be included in the network 302, and, can comprise that the time is divided module and time slot is provided with module.Design module 318 can comprise memory 324, and it operationally links to each other with design module 318.Memory 324 can be stored and reduce transfer of data time-delay and provides the relevant information of suitable processing time of scheduling, coding and decoding, and store with reduce communication network 302 in other relevant appropriate information of time-delay.Processor 326 is operably connected to design module 318 (and/or memory 324) so that analyze with reduce communication network 102 in the relevant information of time-delay.Processor 326 can be that the information processing device that receiver 306 receives is analyzed and/or generated to a kind of being exclusively used in, it can be a kind of processor of one or more parts of control system 300, and/or, can be a kind of processor of not only having analyzed but also generated one or more parts of information that design module 318 receives and control system 300.

[0055] memory 324 can store with receiver 306 and transmitter 304 between the setting of control field or the relevant agreement of division of control field, or the like, thereby system 300 can adopt agreement and/or the algorithm of being stored, to realize the improvement communication in the wireless network described herein.What will be appreciated that is that data storage part described herein (for example, memory) can be volatile storage or non-volatility memorizer, maybe can comprise volatility and non-volatility memorizer.Have restrictedly by way of example and not, non-volatility memorizer can comprise read-only memory (ROM), programming ROM (PROM), electrically programmable ROM (EPROM), electrically-erasable ROM (EEROM) (EEPROM) or flash memory.Volatile storage can comprise random access storage device (RAM), and it is as external buffer memory.Have restricted by way of example and not, RAM can adopt various ways, for example, synchronous random access memory (DRAM), dynamic ram (DRAM), synchronous dram (SDRAM), Double Data Rate SDRAM (DDR SDRAM), enhancement mode SDRAM (ESDRAM), synchronization links DRAM (SLDRAM) and direct rambus RAM (DRRAM).The memory 324 of disclosed embodiment will include, but are not limited to the memory of these or other adequate types.

[0056], wherein shows transmission and time of reception line 400 referring now to Fig. 4.(for example, redness) access point shows expression access point (or terminal) three time slots of emission phase, is designated as 402 (first red time slots), 404 (second red time slot) and 406 (the 3rd red time slot) for first color.Equally, (for example, blueness) access point shows expression access point (or terminal) three time slots of emission phase, is designated as 408 (first blue time slots), 410 (second blue time slot) and 412 (the 3rd blue time slot) for second color.For convenience of description, will call redness and blueness to the access point that separates.But, should be understood that, can utilize another kind of technology to distinguish different access points, and utilizing color here is for simplicity.As shown in the figure, control corresponding field 414-424 can be located at the single position of each time slot 402-412 front.

[0057] the relevant time period can be expressed as horizontal line 426, wherein, the time moves from left to right.With correlation time segment table be shown on the timeline 426, as " request " 428; " allowance " 430; Data transmission start point is designated as " TX begins " 432; DTD is designated as " Tx end " 434; " ACK/NACK transmission " 436.Relevant delay be request/invitation delay of from 438 to 440, request/emission delay of from 438 to 442 and from 444 to 446 ACK/NACK delay.

[0058] during the control section 414 of the first red time slot 402, sends request (448).If there is other red node (not shown) to want data are sent to blue node, then described other red node can send these data during the request of the first red time slot 402 or control cycle 414.For convenience of explanation, should suppose receiver a plurality of requests of can distinguishing simultaneously basically and decode.To protect and be shown in 450 places at interval.

[0059] blue access point can consider how these requests and decision permit described request.In the control section 420 of first blue time slot 408, carry allowance message.The red access point that receives allowance sends in second red time slot 404.Because decode time usually will be longer than guard time, so the blue access point of recipient can carry out ACK or NACK in the 3rd blue time slot 412.In order to make channel keep occupied state, can use two kinds of hybrid ARQ entangled objects (Interlace).For example, the red time slot of even number can be corresponding to first kind of HARQ entangled object (or handle), and the red time slot of odd number can be corresponding to second kind of HARQ entangled object (or processing).

[0060] Xiang Guan delay can postpone for transmission delay, retransmission delay and jumping.Transmission delay is to send request and begin to send minimum time between the data.Retransmission delay is the end of transmission and the time between the transmission beginning for the first time again.If initial be transmitted in the decoding of not succeeding of receiver place, then can suitably transmit again.Jump to postpone that to be transfer of data at one jump onto finishes and identical data is transmitted in the next one and jumps onto time between the beginning.

[0061] restriction can realize that the processing time of delay (emission, repeating transmission and jumping) is decode time, scramble time and scheduling time.Decode time be finish transfer of data and receive ACK or NACK between time.Decode time is illustrated in the up duration that the receiver place is used for decoding transmission (for example, realization is based on the decoding of convolution, Turbo or LDPC).Scramble time is to receive to permit and begin to launch time between the data.Scramble time is transmitter is prepared data (for example, realizing convolution, Turbo or LDPC coding and/or the sub-packet configuration of HARQ) according to allowance a up duration.Scheduling time is the time that sends from one or more users request of receiving with in response at least a portion of these requests between the allowance.Scheduling time is illustrated in the up duration that receiver end is handled request, traffic control algorithm and determined to permit which user and which resource.

[0062] as shown in the figure, control field can be located at the single position of time slot front.When control field was in this position, it approximately was two time slots that emission postpones, and retransmission delay approximately is three time slots (suppose that NACK is accompanied by spontaneous allowance, they are not need to obtain to ask the allowance that just can make).Jumping delay approximately is two time slots, and the suppose relay node can be made the grouping request of relaying forward that is in the receiving course, but does not know whether it can be correctly decoded (being herein referred to as request in advance).With the corresponding processing time of the control field that is positioned at the time slot front be: occupy about two time slots decode time, occupy the scramble time of an about time slot and the scheduling time of an about time slot.

[0063] in case should be pointed out that the time slot size be fix or establish after, so, delay is just fixing, and, do not have further trading off of a delay and another delay.Time slot size self can depend on multiple other restrictive condition, as physical layer packet size, delay requirement, channel dynamics, fairness or the like.The scheduling time of a time slot can be suitable, but the Code And Decode time can the excess supply.The single position that control field is located at the time slot front does not make it reduce, and has therefore reduced retardation.

[0064] Fig. 5 shows the setting according to the control field of one or more embodiment disclosed herein.Show the emission cycle 502 of first access point (for example, red access point) and the emission cycle 504 of second access point (for example, blue access point).The emission cycle 502 and 504 has control corresponding field 506 and 508, and its position is away from arbitrary end of corresponding time slot 502 and 504. Though control field 506 and 508 is shown in the centre of corresponding time slot 502 and 504, should be understood that, control field 506 and 508 can be located at any positions in time slot 502 and 504.Here, will adopt the setting of this mode to be called " setting of single position ".

[0065] the single position of control field 508 is provided with and can alleviates the requirement of request in advance, is not correctly decoded at via node under the situation of grouping, and request in advance can cause wasting resource.Also can the reduction retransmission delay be set with 506 single position of control field.Reducing retransmission delay is one of the key factor that will consider in multi-hop environment, because the delay of each jumping need be less, to satisfy total time-delay needs.When control field adopts single position to be provided with, can utilize single FARQ entangled object.In addition, this set has been realized the compromise of scramble time and decode time as required, and the summation of time is approximately a time slot.

[0066] should be pointed out that the single position that utilizes control field is provided with scheduling time that a time slot can be provided and less than the decode time of a time slot.Though this may be suitable according to some embodiment, in other embodiments, these times may be too short.In these embodiments, can increase the time slot duration, thereby prolong the opportunity of scheduling time and/or decode time.

[0067] the leveled time line 508 shown in has the sequential of " request " 510 and corresponding " allowance " 512.Scheduling time or dispatch delay 514 approximately are time slots, and do not consider the position of the control field 506,508 in this time slot.The summation of scramble time 516 and decode time 518 also approximately is a time slots section.But being provided with of control field determined how a slot time section divides between scramble time 516 and decode time 518.Usually, decode time 518 is longer than the scramble time 516, therefore, control field 508 can be set to the right side at time slot 504 centers, to realize long decode time 518.

[0068] be positioned under the situation of keeping right at the time slot center in control field 508, according to the position of control field 508 with respect to time slot 504 beginnings, emission postpones can be greater than a time slot.Retransmission delay can be an about time slot, postpones to be about two time slots and jump, but does not need to ask in advance.

[0069], shows division setting according to the control field 600 of a plurality of embodiment referring now to Fig. 6.Show red access point emission cycle with control field 602 and blue access point emission cycle with control field 604.With control field 602,604 be divided into two sections can postpone and compromise between the processing time aspect additional flexibility is provided.Single position/away from the center is provided with and divides the compromise of the similar type all realized between scramble time and the decode time be set.But, divide to be provided with and can also allow scheduling time of adding.First section 606,610 of control field 602,604 can be carried other control information that " request " field is also carried " pilot tone " alternatively or is used for scheduler task (for example, institute's requested resource, service quality (QoS) restriction etc.).Control field 608,612 can be carried the out of Memory of " allowance ", " ACK/NACK " or relevant resource allocation or decoded result.

[0070] utilize the division setting of control field can provide the retransmission delay of the emission delay that has two time slots of asking in advance, a time slot and the jumping of two time slots to postpone.Decode time can be less than a time slot, and the scramble time can be less than a time slot, thereby the summation of Code And Decode time is the length of a time slot.Can be according to the interval between the control field and scheduling time 614 is designed to be between one and two time slots.

[0071] with single that situation is set is similar, divides to be provided with and realized the compromise of scramble time 616 and decode time 618, simultaneously temporal summation is remained on a time slot.But, divide to be provided with and realized more scheduling time, and do not increase the time slot size.Should be understood that, when utilizing single position to be provided with, should increase the time slot size, thereby increase available scheduling time.The emission request postpones to be shown 620, and guard time is shown 622.

[0072] divide and utilization to be set to ask in advance, and the single plan of establishment does not utilize these requests.But, additional request field can be alleviated the needs of asking in advance as the part of second control field (control field that comprises " allowance " and " ACK/NACK ").According to typical HARQ operator scheme (for example, the relevant changeability the when HARQ when grouping is successful usually retransmits trial and retransmits trial and success), this can be more better than having the preliminary election request.

[0073] in certain embodiments, in order to alleviate request in advance, the receiving node that the next one is jumped onto can be intercepted the ACK that sends, and this ACK is the recessiveness request to resource.For example, data are sent to Node B from node A, arrive node C again.If Node B has successfully been decoded from the transmission of node A, so, Node B can be to node C request resource.But if node C listens to the ACK that Node B sends to node A, so, node C can use the ACK from Node B to node A recessively, to infer the resource request of Node B.

[0074], understands the method that can realize better with reference to the schematic diagram of Fig. 7-9 according to one or more aspects of each embodiment according to above illustrated and described example system.Simultaneously, for convenience of description, with these method representations and be described as a series of frames, what be to be understood that and recognize is, these methods are not limited to the order of frame, because according to these methods, some frame can be arranged with different order, and/or, can be with illustrated and described other frame be consistent here.In addition, can not need the frame shown in all to realize method according to one or more aspects of the disclosed embodiments.Should be understood that each frame can or be used to software, hardware, software and hardware combining realize that any other the suitable module (for example, equipment, system, processing, parts) with the frame correlation function realizes.What it is also recognized that is, these frames have only been described some aspect of introducing in a simplified manner here, and, these aspects can with still less and/or the frame of greater number describe.Those of ordinary skill in the art will understand and appreciate, also these method representations can be become a series of correlation behaviors or incident, for example adopt state diagram.

[0075] flow chart of Fig. 7 shows and is used for the method 700 of dividing data and control field selectively.In 702, determine that the time between scramble time and the decode time divides.In 704, be based in part on determined time division, control field is located in the frame selectively.This selectivity setting can comprise that the The whole control field is located at time slot begins the place.In this case, time slot size and delay are fixed, and it is impossible that a delay and another delay are traded off.The excessive supply Code And Decode time, they can not reduce, and have therefore reduced retardation.

[0076] another kind of selectivity setting can comprise control field is located at single position in the time slot.This set allows scramble time and decode time are traded off, if the summation of twice is a time slot.Should be pointed out that scheduling time is a time slot, and the decode time that is less than a time slot in some cases may be too short, and, in order to prolong decode time, should prolong the time slot duration.

[0077] control field is divided into two sections and each section is located at diverse location is another kind of selectivity setting.The division control field provides the compromise flexibility between scramble time and the decode time, and the summation that keeps them simultaneously is a time slot.This class setting also provides long scheduling time, and can not increase the time slot size.The control field of two-part can comprise request in advance, still, additional request field is located at second section has alleviated the demand of asking in advance.Alternatively or in addition, can utilize recessiveness request to monitor to alleviate to the demand of request and/or additional request field in advance.

[0078] flow chart of Fig. 8 shows and adopts single position that the method 800 that selectivity is provided with control field is set.In 802, the single position of the control field in the assigned timeslot is provided with.This appointment can be made based on compromise between time-delay and processing time.This set can reduce the quantity of request in advance, and/or, can shorten retransmission delay.In addition, under this set, can utilize single HARQ.

[0079] in 804, judges whether decode time should be longer than the scramble time, if decode time should so, in 806, be set to control field on the right side at time slot center than scramble time long (" YES ").If the scramble time is answered the ratio decoder time long (" NO "), so, in 808, control field is set to the left side at time slot center.Should be pointed out that when control field is located at the single band of position the compromise length that should be approximately a time slot between scramble time and the decode time.

[0080] flow chart of Fig. 9 shows to utilize and divides the method for designing 900 that the Position Control field is carried out data communication.In 902, select the division position of control field.This selection can be made based on various standards, and described standard comprises time-delay and the trading off between the processing time in the transfer of data.Can to reduce time-delay, provide enough processing times simultaneously with the optimization of trading off.In 904, control field is divided into two sections.First section can be carried other control information that " request " also carried " pilot tone " alternatively or be used to realize scheduler task (for example, institute's requested resource, QoS, restriction etc.).Second section out of Memory that can carry " allowance ", " ACK/NACK " and relevant resource allocation or decoded result of control field.

[0081] in 906, judges whether request is acceptable in advance.Under via node can not the situation of successful decoded packet, request in advance can the waste resource.If comprise acceptable request (" YES ") in advance, then method 900 continues in 908, and transmitting node adds request in advance in the frame to.If the request judged in advance is unacceptable (" No "), judge in 910 then whether the additional request field should be included in second section of control field in 906.If second section of control field can comprise additional request field (" YES "), then add this field by transmitting node in 912.If should not comprise additional request field (" NO "), then method 910 continues in 914, monitors recessive request by receiving node herein.

[0082] if will comprise request or additional request field in advance, then transmitting node comprises this request.If do not comprise request or additional request field in advance, can monitor recessive request at the receiver node place.In certain embodiments, in 914, can be included in the receiving node that the next one jumps onto and intercept or monitor the ACK (for example, Yin Xing resource request) that sends the supervision of recessiveness request.Can be with this ACK decoding and as recessive resource request.

[0083] for example, three nodes (node A, Node B and node C) are arranged.Data will send to Node B from node A, arrive node C again.Node A sends to Node B with request in first time slot.In next time slot, Node B is permitted this request.Usually, Node B this grouping of before grouping is sent to node C, should at first decoding, this grouping because if Node B is not successfully decoded, then this grouping can not be sent to node C.But because Node B just sends once every a time slot, in certain embodiments, Node B can send request (being herein referred to as request in advance) to node C during node C sends the time slot of permitting to node A.To successfully decode the grouping that receives from node A when having very high likelihood when Node B, this situation may occur.Send request in advance with substantially the same in time to node A transmission allowance to node C, this has reduced the time-delay between node A and the node C.If comprise the additional request field, then Node B is decoded to grouping it sends the identical time slot of request to node C during and is sent ACK to node A.

[0084] supposes in the example that provides, to carry out request and additional request in advance by Node B (transmitter).Like this, node C (receiver) does not need to search for recessive ACK.But, if additional request or request in advance are provided, the ACK that can monitor node B sends to node A of node C then, and send recessiveness request to data according to detecting this ACK.

[0085] referring now to Figure 10, show system 1000, it is convenient to coordinate communication between a plurality of communication protocols in wireless communications environment according to one or more disclosed embodiments.System 1000 can be arranged in access point and/or subscriber equipment.System 1000 comprises receiver 1002, and it can be from for example receiver antenna received signal.Receiver 1002 can be carried out typical action to received signal, for example, and filtering, amplification, down-conversion etc.Receiver 1002 can also carry out digitlization with trim signals, to obtain sampling.Demodulator 1004 can obtain the receiving symbol of each symbol period correspondence, and provides receiving symbol to processor 1006.

[0086] processor 1006 can be a kind of emission information processing device that is exclusively used in the information that analysis receiver parts 1002 receive and/or generates transmitter 1016.Processor 1006 can be controlled one or more parts of subscriber equipment 1000, and/or, the information that processor 1006 can analysis receiver 1002 receives generates the emission information of transmitter 1016 and one or more parts of control subscriber equipment 1000.Processor 1006 can comprise can be to the controller part of coordinating with communicating by letter of additional user equipment.

[0087] subscriber equipment 1000 can also comprise memory 1008, and it operationally links to each other with processor 1006, and storage information and any other suitable information relevant with coordinating communication.Memory 1008 can also be stored the agreement relevant with coordinating communication.What will be appreciated that is that data storage part described herein (for example, memory) can be volatile storage or non-volatility memorizer, perhaps, can comprise volatility and non-volatility memorizer.Have restrictedly by way of example and not, non-volatility memorizer can comprise read-only memory (ROM), programming ROM (PROM), electrically programmable ROM (EPROM), electrically-erasable ROM (EEROM) (EEPROM) or flash memory.Volatile storage can comprise random access storage device (RAM), and it is as external buffer memory.Have restricted by way of example and not, RAM can adopt various ways, for example, synchronous random access memory (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), Double Data Rate SDRAM (DDRSDRAM), enhancement mode SDRAM (ESDRAM), synchronization links DRAM (SLDRAM) and direct rambus RAM (DRRAM).The memory 1008 of thematic system and/or method will include, but are not limited to the memory of these and any other adequate types.Subscriber equipment 1000 also comprises Symbol modulator 1010 and sends the transmitter 1012 of modulation signal.

[0088] Figure 11 shows system 1100, and it helps the coordinating communication agreement according to each side.System 1100 comprises base station or access point 1102.As shown in the figure, reception antenna 1106 is passed through from one or more subscriber equipment 1104 received signals in base station 1102, and sends to one or more subscriber equipmenies 1104 by transmitting antenna 1108.

[0089] base station 1102 comprises receiver 1110, and it is from reception antenna 1106 reception information, and operationally links to each other with the demodulator 1112 of demodulate reception information.Demodulation symbol is analyzed by the processor 1114 that links to each other with memory 1116, memory 1116 storages and relevant information such as code group (codecluster), user equipment allocation situation, relevant inquiring table, unique scramble sequence.Modulator 1118 can be undertaken multiplexing by the signal that transmitting antenna 1108 sends to subscriber equipment 1104 transmitter 1120.

[0090] Figure 12 shows exemplary wireless communication system 1200.For simplicity, wireless communication system 1200 has been described a base station and a terminal.But what will be appreciated that is, system 1200 can comprise a plurality of base stations or access point and/or a plurality of terminal or subscriber equipment, and wherein, additional base station and/or terminal can be similar basically or different with terminal with the exemplary base station that describes below.In addition, what will be appreciated that is that base station and/or terminal can adopt system described herein and/or method, so that carry out radio communication betwixt.

[0091] referring now to Figure 12, on down link, at access point 1205 places, 1210 pairs of business datums of emission (TX) data processor receive, format, encode, interweave and modulate (or sign map), and modulation symbol (" data symbol ") is provided.Symbol modulator 1215 receives and deal with data symbol and frequency pilot sign, and symbols streams is provided.Symbol modulator 1215 is carried out data and frequency pilot sign multiplexing, and obtains one group N emission symbol.Each launches the signal that symbol can be data symbol, frequency pilot sign or null value.Frequency pilot sign can constantly send in each symbol period.Frequency pilot sign can be frequency division multiplexing (FDM), OFDM (OFDM), Time Division Multiplexing, frequency division multiplexing (FDM) or code division multiplexing (CDM).

[0092] transmitter unit (TMTR) 1220 receiving symbols stream and convert thereof into one or more analog signals, and further (for example repair, amplification, filtering and up-conversion) this analog signal, the down link signal that is suitable on wireless channel, transmitting with generation.Then, down link signal is sent to terminal by antenna 1225.At terminal 1230 places, antenna 1235 receives this down link signal, and received signal is offered receiver unit (RCVR) 1240.Receiver unit 1240 is repaired (for example, filtering, amplification and down-conversion) to received signal, and will adjust signal digitalized, to obtain sampling.Symbol-modulated demodulator 1245 obtains N receiving symbol, and will receive frequency pilot sign and offer processor 1250, to carry out channel estimating.Symbol-modulated demodulator 1245 is further estimated from the frequency response of processor 1250 receiving downlinks, carry out data demodulates to receiving data symbol, estimate (being the estimation of transmitted data symbols) to obtain data symbol, and this data symbol estimated to offer RX data processor 1255, it (for example carries out demodulation to the data sign estimation, symbol de-maps), deinterleaving and decoding, the business datum of being launched to recover.The processing of symbol demodulator 1245 and RX data processor 1255 is complementary mutually with the processing of the Symbol modulator 1215 at access point 1205 places and TX data processor 1210 respectively.

[0093] on up link, TX data processor 1260 processing service data also provide data symbol.Symbol modulator 1265 receives data symbols and data symbol and frequency pilot sign is carried out multiplexing, modulates, and symbols streams is provided.Then, transmitter unit 1270 receives and handles this symbols streams, to generate uplink signal, it is sent to access point 1205 by antenna 1235.

[0094], comes the uplink signal of self terminal 1230 to receive, and handle, thereby obtain sampling by receiver unit 1275 by antenna 1225 at access point 1205 places.Then, symbol demodulator 1280 is handled this sampling, and provides the data symbol that receives frequency pilot sign and up link to estimate.1285 pairs of these data symbols of RX data processor are estimated to handle, to recover the business datum that is sent by terminal 1230.Each active terminal that 1290 pairs of processors send on up link is carried out channel estimating.

[0095] processor 1290 and 1250 is respectively in access point 1205 and terminal 1230 place's executable operations (for example, control, coordination, management etc.). Corresponding processor 1290 and 1250 can be associated with stored program coding and memory of data unit (not shown ).Processor 1290 and 1250 can also be carried out calculating, thereby the frequency and the impulse response of deriving up link and down link are respectively estimated.

[0096] for multi-address system (for example, FDMA, OFDMA, CDMA, TDMA etc.), a plurality of terminals can send on up link simultaneously.For such system, can between different terminals, share pilot subbands.Channel estimation technique can be used under the following situation, that is, the pilot subbands that is used for each terminal is crossed over whole working band (may except that band edge).This pilot subband structure will be desirable for the frequency diversity of obtaining each terminal.Technology described herein can realize with various modules.For example, these technology can make up with hardware, software or its and realize.Realize that for hardware the processing unit that is used for channel estimating can be implemented in one or more application-specific integrated circuit (ASIC)s (ASIC), digital signal processor (DSP), digital signal processor spare (DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, is used to carry out other electronic unit or its combination of the described function of the application.

[0097] Figure 13 shows and is used in the control of multi-hop wireless communication network dividing data transmission selectively and the system 1300 of data field.System 1300 is expressed as a plurality of functional blocks, and these functional blocks can be the functional block of expression by processor, software or its combination (for example, the software and hardware combining) function that realizes, and can be included in wireless device or the miscellaneous equipment.

[0098] system 1300 comprises logic module 1302, is used for determining scramble time and decode time division.The logic module 1304 that is used to be provided with the control field in the frame can be based in part on the division of determining between scramble time and the decode time and make decision is set.The position of control field can be positioned at the front of time slot, the center of time slot, the side (left side or the right) at time slot center, perhaps, can divide control field and be arranged on two positions in the time slot.

[0099] system 1300 can also comprise one or more logic modules 1306 that are used for control field is divided into two sections.Control field is divided into two sections better delay performance can be provided, provide the suitable processing time for scheduling, Code And Decode simultaneously.Can also comprise that being used for selectivity comprises the logic module 1308 of request in advance.If request field is included in second section of control field division or that separate, then can not comprise request in advance.System 1300 can also comprise logic module 1310, and ACK and the resource request of this ACK as recessiveness is used to decode.

[00100] for example, wireless device can comprise and is used for determining the module (it can be a logic module 1302) that scramble time and decode time are divided and is used to be based in part on the division of determining between scramble time and the decode time and the module (it can be a logic module 1304) of the control field in the frame is set.In certain embodiments, wireless device can also comprise and be used for control field is divided into two sections module that it can be a logic module 1306.Can also comprise the module (it can be a logic module 1308) that is used for comprising selectively in advance request and the ACK and of being used to decode the module (it can be a logic module 1310) of this ACK as the resource request of recessiveness.

Should be understood that [00101] embodiment described in the application can realize with hardware, software, firmware, middleware, microcode or their any combination.When system and/or method were realized by software, firmware, middleware or microcode, program code or code segment, they can be stored in the machine readable media, in memory unit.Certain code segment can be represented process, function, subprogram, program, routine, subroutine, module, software kit, class or any instruction set, data structure or program statement.A code segment can link to each other with another section code segment or hardware circuit by transmitting and/or reception information, data, independent variable, parameter or memory contents.Information, independent variable, parameter, data or the like can comprise that Memory Sharing, message transmission, token transmission, Network Transmission etc. transmit, transmit or transmit by any suitable method.

Realize for software that [00102] technology of describing among the application can realize with the module (for example, process, function etc.) of carrying out the described function of the application.These software codes can be stored in the memory cell, and are carried out by processor.Memory cell can be implemented in the processor, also can be implemented in outside the processor, and under latter event, it can be connected to processor communicatedly via various means, and these all are well known in the art.

[00103] Shang Mian description comprises the example of one or more embodiment.Certainly, can not describe all possible combination of parts or method in order to describe these embodiment, but those of ordinary skill in the art should be realized that these embodiment can do further combination and conversion.Therefore, the embodiment that describes among the application institute that is intended to contain in the spirit that falls into appended claims and the protection range changes, revises and is out of shape.In addition, with regard to " comprising " speech that uses in specification or claims, the mode that contains of this speech is similar to " comprising " speech, just explains as link word in the claims as " comprising " speech.

Claims (21)

1, a kind of method that is used for data communication comprises:

The time between scramble time and the decode time of determining divides; And

Be based in part on determined time division, control field is set in frame selectively.

2, method according to claim 1 is provided with control field selectively and also comprises:

If described decode time is longer than the described scramble time, then described control field is located at right side, time slot center, perhaps,, then described control field is located at the time slot center left if described decode time is shorter than the described scramble time.

3, method according to claim 1 is provided with control field selectively and also comprises:

Described control field is divided at least two sections; And

Provide request field, as the part one of in described at least two sections of described control field.

4, method according to claim 1 also comprises:

Described control field is divided into first section and second section;

In request, pilot tone and the control information at least one is located in first section of described control field; And

In allowance, ACK/NACK and the information relevant with resource allocation or decoded result at least one is located in second section of described control field.

5, method according to claim 1 also comprises:

The affirmation that is sent by the node in the previous dive is decoded; And

The affirmation of being decoded is used as recessive resource request.

6, method according to claim 1, wherein, described control field comprises request field, permit field and affirmation/deny field.

7, method according to claim 1 also comprises:

Judge whether in described frame, to be provided with request in advance; And

Transmitting node is located at described request in advance in the described frame according to the described judged result of asking in advance.

8, method according to claim 7 should not be located at described request in advance in the described frame if described judged result indicates, and so, described method also comprises:

Judge whether the additional request field is located in second section of described control field; And

Described transmitting node comprises described additional request field according to described additional request field judged result.

9, method according to claim 8, if described judged result indicates in second section that described additional request field should be located at described control field, so, described method also comprises:

Monitor recessive request by receiving node.

10, a kind of device that is used for data communication comprises:

Time is divided module, determines that the time between scramble time and the decode time divides; And

Time slot is provided with module, is based in part on determined time division, determines the setting of control field in frame.

11, device according to claim 10, if described decode time is longer than the described scramble time, then described time slot is provided with module single control field is located at right side, time slot center, perhaps, if described decode time is shorter than the described scramble time, then described time slot is provided with module it is located at described time slot center left.

12, device according to claim 10 also comprises recessive request monitor, and it monitors the ACK/NACK field from sending node, and described ACK/NACK field is considered as resource request.

13, device according to claim 10, described time divides module described control field is divided into two sections, and with request field be located at one of described two sections in.

14, device according to claim 13, described time divides that module will ask and pilot tone is located in first section of the control field of being divided, and will permit being located in second section of the control field of being divided with ACK/NACK.

15, a kind of computer-readable medium stores the computer executable instructions that is used for data communication thereon, and described instruction is used for:

The time between scramble time and the decode time of determining divides; And

Be based in part on determined time division, control field is set in frame selectively.

16, computer-readable medium according to claim 15, described instruction also is used for:

If described decode time is longer than the described scramble time, then described control field is located at right side, time slot center, perhaps,, then described control field is located at the time slot center left if described decode time is shorter than the described scramble time.

17, computer-readable medium according to claim 15, described instruction also is used for:

Described control field is divided into first section and second section; And

Carry out one of following operation:

Provide request field, as a part of first section of described control field; And

The affirmation that is sent by the node in the previous dive is decoded; And

The affirmation of being decoded is used as recessive resource request.

18, a kind of processor that is used for data communication, described processor is used for:

The time between scramble time and the decode time of determining divides; And

Be based in part on determined time division, control field is set in frame selectively.

19, processor according to claim 18, described processor also is used for:

Described control field is divided into first section and second section;

In request, pilot tone and the control information at least one is located in first section of described control field; And

In allowance, ACK/NACK and the information relevant with resource allocation or decoded result at least one is located in second section of described control field.

20, a kind of device that is used for data communication comprises:

Be used for determining the module of the time division between scramble time and the decode time; And

Be used to be based in part on determined time division is provided with control field selectively in frame module.

21, device according to claim 20 also comprises:

Be used for described control field is divided into two sections module; And

Be used for comprising selectively the module of request in advance; And

Be used for to ACK decode and with described ACK as the module of implicit resource request.

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