CN1989721A - Method and apparatus for link control in wireless communications - Google Patents
Method and apparatus for link control in wireless communications Download PDFInfo
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- CN1989721A CN1989721A CN 200580025374 CN200580025374A CN1989721A CN 1989721 A CN1989721 A CN 1989721A CN 200580025374 CN200580025374 CN 200580025374 CN 200580025374 A CN200580025374 A CN 200580025374A CN 1989721 A CN1989721 A CN 1989721A
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Abstract
Methods and systems are disclosed for use in a communication system 200 to selectively delay transmitting a second negative acknowledgement (NAK) after an initial NAK has already been sent requesting retransmission of a corrupted packet. The receiving entity 210 initiates a NAK prohibit timer 641 associated with a specific NAK 631 which prevents status reports to transmitting entity 220 from including a retransmission of the specific NAK until the timer expires. Use of the NAK prohibit timer 641 reduces the likelihood of spurious retransmissions from the transmitting entity 220 caused by a second NAK from the receiving entity 210 when the retransmission process has already been initiated.
Description
Require the priority of 35 U.S.C. § 119
The title that the present invention requires on June 16th, 2004 to submit to is the U.S. Provisional Application the 60/580th of " Method and Apparatusfor Link Control in Wireless Communications ", No. 458, the title of submitting to on May 4th, 2005 is the U.S. Provisional Application the 60/677th of " Method and Apparatusfor Link Control in Wireless Communications ", No. 975 priority, these provisional application all have been transferred to its assignee, thereby specially are combined in herein as a reference.
Technical field
The present invention relates generally to radio communication, more specifically relate to the controlling links in the radio communication.
Background technology
For the increase of the demand of the Radio Resource that transmits voice-and-data message sometimes because the competition of the signal that transmits simultaneously causes the increase of error of transmission.Bad weather, signal strength signal intensity shade (shadows), electronic jamming or other situation that influences air interface cause one or more packet loss or the damage in the radio communication, also can cause error of transmission.In when, packet loss taking place or damaging when, typically, the data that other wireless system resources needs transmission again to lose.
Figure 1A and 1B show the conventional scheme of the packet radio that is used for recovering that W-CDMA loses or damages.The figure shows poll 120, the grouping 101-105 that loses, the status report that comprises NAK (negative response) 131-133, Status Disable timer 141-143 from the transmitter reception at the receiver place, and the typical time relationship between the grouping 111-115 that is retransmitted.Figure 1A shows the various signal 101-120 that receive at the receiver place, and Figure 1B shows the NAK131-133 that sends and retransmits 111-115 between receiver and transmitter.Time slot 101-105 is illustrated in the impaired grouping in receiver place.
After determining that grouping 101 is damaged, receiver returns status report to transmitter, and status report comprises that indicator-transmitter initiates the NAK131 of the re-transmission of impaired grouping 101.Conventional W-CDMA status report typically has the requirement of the NAK that comprises nascent all the unsettled sequence number breach of sequence number (sequence number gap) that receive from up-to-date order.In General Status Report, this need comprise the sequence number gap that all are unsettled, and then has wasted valuable Radio Resource.For example, when status report is sent back to transmitter, and status report has and is used for causing for the second time unnecessary puppet from transmitter to retransmit (spurious retransmission) when the NAK of the impaired grouping of retransmission processes, has wasted Radio Resource.
For fear of causing the pseudo-valuable wireless bandwidth that retransmits and waste, W-CDMA has introduced state-forbid mechanism, state-forbid timer 141-143.Common state-forbid that timer is to be activated immediately when any status report is sent out.At present, in case W-CDMA requires starting state-forbid timer, then no longer transmission state report before timer expiration.In that state-when forbidding that timer is moving, any poll that receives from transmitter all is delayed, up to timer expiration.Detect after the grouping of damage, the status report that has the NAK that represents packet corruption is delayed, up to unsettled state-forbid timer expire (expire).
In Fig. 1, send from receiver comprise the status report of NAK131 in, starting state-forbid timer 141 immediately, this can prevent to transmit any other status report before timer expires.Like this, when detecting the grouping 102 of damage (at state-forbid timer 141 during still in operation), the status report that has the NAK132 that expression grouping 102 damages is delayed, up to state-forbid timer 141 overtime (time out).Till when time Status Disable timer 141 is overtime, received re-transmission at the receiver place, shown in Figure 1A and 1B for the grouping 101 that damages as the grouping 111 that is retransmitted.After state-forbid that timer 141 has expired, receiver can send another status report, this status report comprises the NAK132 of the grouping 102 that request retransmission is damaged, and the damage of grouping 102 is before at state-be detected when forbidding timer 141 still in operation.
The present invention is devoted to overcome, and perhaps alleviates the influence of one or more problems of above pointing out at least.
Summary of the invention
Each side of the present invention disclosed herein satisfies above-mentioned needs by being provided for the status report mechanism of RLC-AM pattern, and wherein the RLC-AM pattern allows flexible configuration and make to carry out the reception of out-of-sequence (out-of-sequence) PDU.
According to each side of the present invention, the equipment, method and the computer-readable medium that are used to control communication link are provided.Each side comprises: beam back negative response (NAK) from the grouping of the damage of transmitting entity with from receiving entity to transmitting entity in the detection of receiving entity place.In response to the NAK that is sent out, start the NAK that is associated with the grouping that damages and forbid timer.
According to an aspect of the present invention, NAK forbids that timer is associated with the grouping of specific damage, and prevents to forbid sending before timer expires at NAK any other NAK of the grouping that is used for specific damage.Yet if detect the grouping of other damage, NAK forbids that timer can not prevent to send other NAK of the grouping that is used for other damage.According to an aspect of the present invention, NAK forbids that timer is initially set to an operation round trip cycle (RTT) or more.
According to an aspect of the present invention, start ACK and forbid timer.ACK forbids that the duration of timer can forbid that the duration of timer is longer or shorter than NAK, depends on the required RLC window response forward that makes.ACK forbids that the timer delayed delivery only has the status report of ACK, forbids that up to ACK timer expires.Yet ACK forbids that not delayed delivery of timer comprises the status report of NAK.
According to an aspect of the present invention, after transmitting entity sends ACK, start the ACK counter from receiving entity.The ACK counter adds one to each order (in-sequence) PDU that receives, and is careful the degree that the receiver window is filled.If the ACK counter reaches predefined threshold value, then send another ACK.Predefined threshold value can be defined as the percentage of RLC window width.
Description of drawings
Figure 1A and 1B show the conventional scheme of the grouping that is used to recover to lose or damages;
Fig. 2 shows the network configuration of communicating by letter between the wired and radio station according to the support of various embodiments of the present invention;
Fig. 3 shows travelling carriage and fixing base station;
Fig. 4 shows when each RTT only transmits a status report, the delay of the re-transmission of the PDU that influence is lost;
Fig. 5 A and 5B show use NAK according to each side of the present invention and forbid that timer recovers to lose or the scheme of the grouping that damages;
Fig. 6 A and 6B show use NAK according to each side of the present invention and forbid that timer, ACK forbid that timer and Status Disable timer recover to lose or the scheme of the grouping that damages;
Fig. 7 shows the method that is used for controlling links according to various embodiments of the present invention;
Fig. 8 shows the details of method that is used to control NAK according to various embodiments of the present invention;
Fig. 9 shows the details of method that is used to control ACK according to various embodiments of the present invention; With
Figure 10 shows and can be used for adjusting the ACK ACK counter procedure of reporting period according to various embodiments of the present invention.
Embodiment
In the relevant drawings of general's specification below and expression various embodiments of the present invention each side of the present invention is disclosed now.Alternative embodiment can be designed, and the spirit and scope of the present invention can be do not broken away from.For the present invention more clearly is described, some elements of those of ordinary skills not being known are carried out very detailed description, perhaps omit description to it, like this, can not cause and obscure correlative detail of the present invention.
The disclosure and claim in the whole text in term " transmitting entity " (perhaps " transmitter ") and " receiving entity " (perhaps " receiver ") of using be meant the relation of called station to specific cluster (for example, the grouping of damage).Transmitting entity is called station or the communication equipment that sends grouping; Receiving entity is called station or the communication equipment that receives grouping, perhaps, under the situation of the grouping that damages, attempts to receive the called station or the communication equipment of grouping.It is transmitting entity that the equipment that carries out two-way communication divides into groups for some, and to divide into groups for other be receiving entity.The existing receiving circuit of transmitting entity has radiating circuit again, and receiving entity too.Transmitting entity and receiving entity can be radio stations (for example, travelling carriage), also can be the fixed radio stations via cable or electric wire communication.Term used herein " protocol Data Unit " is the unit that passes through the information, grouping or the frame that exchange between network or the peer layer in network (PDU).The term " PDU " that uses interchangeably is defined as having identical implication with " grouping " herein.
Fig. 2 shows the typical wireless network architecture 200 according to various embodiments of the present invention, and this network configuration is supported the communication between fixed radio station and the radio station.Recently the many contention systems that are used for wireless transmission of voice, data and content have obtained popularizing.A kind of in these systems is W-CDMA (Wideband Code Division Multiple Access (WCDMA)), and W-CDMA is issued in December, 1999 by 3GPP (third generation partner program) at first.1999 initial W-CDMA versions are sometimes referred to as R-99.Although many examples that provide herein and explanation reference the W-CDMA system, but can realize various embodiment according to many other wireless or wire communication standards, comprise the various version and the realization of W-CDMA, cdma2000, GSM/GPRS or various other technology.
Wireless system 200 comprises core network 250, one or more RNS 240, wireless user equipment 210 and believes the wire user equipment of line phone 260 such as the land.RNS RNS 240 comprises one or more radio network controller (RNC)s 230 successively respectively, and each radio network controller (RNC) 230 can be connected to many base stations 220 (it typically is called as " Node B " in W-CDMA) communicatedly.According to the details of implementing, Node B 220 can be taked various forms, is called as other title, perhaps has the technical scheme total with other system.For example, in some systems, Node B 220 base stations can be called as basic transceiver station (BTS) or base station system (BSS).Radio network controller, be marked as RNC 230 in the accompanying drawings, can take other form in some implementations, be called as other title, perhaps have the technical scheme total with other system, for example, base station controller (BSC), mobile switching centre (MSC) or Serving GPRS Support Node (SGSN).SGSN normally handles the core-network entities that packet switching connects, and MSC is the core-network entities that the treatment circuit exchange connects.Fig. 2 shows wireless user equipment UE 210, and it can be called as many different titles, for example cell phone, travelling carriage, wireless phone or the like.Scope of the present invention covers the enforcement of assembly of the wireless system of these and other this system, title, term and similar type.
Network shown in the accompanying drawing only is exemplary and can comprises any system that carries out air communication or communicate via attached cable or wired communication path between the permission assembly.This system can mode shown in Figure 2 connect, perhaps, otherwise, as knowing, those of ordinary skills connect.UE 210 and fixed radio station 260 may be embodied as the many dissimilar form of wireline equipment or wireless device, comprise computer, PDA (personal digital assistant), pager, navigator, music or video content download unit, wireless game equipment, catalogue (inventory) control unit of one or more phones, cell phone, wireless connections or carry out the equipment of other type of radio communication via air interface.Honeycomb or other wireless telecommunication services can be communicated by letter with carrier network via fixed network 250 by data link or other network link, and fixed network 250 can be Public Switched Telephony Network (PSTN), internet, Integrated Service Digital Network, one or more Local Area Network, wide area network (WAN), VPN(Virtual Private Network) or other this network.Can also use and decide radio station 260 via PSTN or other fixed network 250 communications same and communicate.
Wireless system 200 controls typically are sent to message or the out of Memory of UE210 via RNS 240 as packet.Each RNC 230 can be connected to one or more Node B 220 base stations.More than under a Node B 220 and the situation that particular UE 210 is associated, all Node B 220 in the UE210 active set can have the E-DCH frame number of same concept, make to send to or can correctly be explained and classify from the grouping of carrying out with two different nodes B 220 of the soft handover (SHO) of UE 210.Comprise the subsystem RNS240 Control Node B 220 of RNC 230 and the radio link between the UE 210.Typically, RNC 230 comprises the logic (for example, processor or computer) that is used for managing and controlling wireless UE 210.The logic of RNC 230 is to register to wireless UE 210 management at the Node B place that is associated with RNC 230 and the function of control such as calling route, registration, authentication, position renewal, switching and encoding scheme.
Data transmit and/or the network of voice messaging by being arranged to, and via the network of the fixed communication lines mode with the interconnection that is similar to network 250, RNC 230 is connected to Node B 220 usually.Typically, via this land line network that can comprise internet and/or PSTN part, carry out communicating by letter and communicating by letter from each RNC 230 and Node B 220 elements to these elements.The upstream, RNC 230 can be connected to a plurality of networks, such as those above-mentioned networks (for example, PSTN, internet, ISDN or the like), thereby allows wireless UE 210 equipment to insert wider communication network.Except voice transfer, can also use Short Message Service (SMS) or other aerial (OTA) method well known in the art to transmit data.
Each Node B 220 has to being associated with Node B 220 or receiving the one or more reflectors and the receiver of information to one or more UE 210 transmission information of Node B 220 registrations or from it.Node B 220 is used the known OTA method of those skilled in the art, wirelessly to UE 210 broadcast data messages or out of Memory.For example, wireless signal between UE 210 and the Node B 220 can be based on any one in some different technologies, these technology include but not limited to, CDMA (code division multiple access), TDMA (time division multiple access), FDMA (frequency division multiple access), OFDM (Orthodoxy Frequency Division Multiplex) and use such as GSM etc. and be used for communicating by letter or any system of the mixed coding technology of the wireless protocols of data network.
Fig. 3 shows the details of UE 210 and Node B 220.Node B 220 comprises with suitable coding protocol or the scheme encoder/decoder 225 to wanting information transmitted and encode and the information that receives being decoded.Node B 220 comprises the receiver/transmitter circuit 227 that is used for from UE 210 wireless receivings and emission grouping, and Node B 220 is used for transmitting and receiving grouping (it can send via Land Lines of Communications) with RNC 230.Node B also comprises processor 221, and processor 221 comprises can carry out or control processing and the activity that relates in the radio communication, particularly processing of setting forth herein or movable circuit or other logic.
Node B 220 can also be configured to comprise and is used for being stored in the memory 223 that carries out as the employed variety of protocol of the wireless communication procedure of being set forth, routine, processing or software herein.For example, memory 223 can be stored and be used for one or more transmission plans, agreement or the strategy of communicating by letter with UE 210.Transmission plan, strategy and agreement comprise about owing to lose or information, the redundancy versions coding (if any) of the timing of the re-transmission that corrupt data causes and will be used for any encoding scheme or the agreement of the transmission and the reception of radio communication.This information can also be stored in the memory of RNC 230, and in needs or in renewal of execution cycle property or system maintenance, this information can be transmitted to Node B 220.
The embodiment of UE 210 as shown in Figure 3, typically comprises processor or other logic 207, memory 209 and encoder/decoder circuitry 211, and they carry out the similar function of appropriate section with Node B 220.For example, encoder circuit 211 circuit such as grade of UE 210 can be configured to coded data, perhaps in other cases, become grouping to be used to be transferred to Node B 220 data encapsulation.Each UE 210 also has known other electronic equipment that is used for wireless receiving and emission information of antenna 213, receiver/transmitter circuit 215 and those of ordinary skill in the art.Whether acceptor circuit 215 is configured to detect the data that receive and is damaged, and radiating circuit is configured to impaired grouping NAK is sent it back transmitting entity (for example, Node B 220).Node B 220 and UE 210 the two as transmitting entity, all should have sufficient memory space and preserve enough groupings, to prevent receiving ACK with congestion window before advancing window.
UE 210 comprises the logic of the function that is used to control UE 210, is labeled as processor 207 in Fig. 2.In practice, this logic can be configured to following form: one or more treatment circuits, microprocessor, digital signal processor (DSP), the microcontroller of the logic of executive resident configuration, perhaps these or other similarly be configured to carry out at least the combination of hardware, software and/or the firmware of operation described herein (for example, described herein UE 210 activities).
According to the transmission conditions of channel, the bit mistake can cause interrupting, and this can solve by mistake recovery or retransmission technique.The probability that frame comprises the bit mistake levels off to the function of the data volume in the bit error rate of channel and example of this frame (instance) or the length.Wireless system 200 can use one or more mechanism that detect from the transmission that has the bit mistake and/or recover to realize, for example, and automatic repeat request (ARQ) and/or forward error correction (FEC) or hybrid ARQ (HARQ).The HARQ system has also increased the use of forward error correction (FEC) except ARQ response feedback technology.
Wireless system typically uses and allows receiver to postback feedback channel about the information of the success of transmission or failure to reflector.The common service band feedback channels of error recovery scheme realizes, although some error recovery scheme can realize in the service band internal feedback.ARQ may be implemented as and uses negative response (NAK sometimes is expressed as NACK) to come request retransmission clearly.Alternately, ARQ may be implemented as to use clearly and replys (ACK) and overtime rule.
After receiving the transmission from UE 210, Node B 220 can be configured to send the ARQ signal, with the feedback of transmission that relevant ACK or NAK form are provided.For example, outside clear and definite service band in the system of ARQ feedback, if be damaged before being received by Node B 220 or lose from the data of UE 210, Node B sends NAK, and indication UE 210 should retransmit the transmission of this failure.
Wireless system 200 may be implemented as R-99 W-CDMA system or according to any realization the in some other wireless standards or the technology.For example, wireless system can be abideed by universal mobile telecommunications system (UMTS) Radio Link control (RLC) protocol specification (3GPP TS25.322 translation 6.0.0 version 6), thereby it is combined in herein as a reference in full clearly.In R-99 W-CDMA, Radio Link control (RLC) protocol processes framing and functions of retransmission.Rlc protocol is supported three independently transmission modes: transparent mode (RLC-TM), unacknowledged mode (RLC-UM) and answer-mode (RLC-AM).In conjunction with the RLC of physical layer, be enough flexibly, it allow to support dissimilar QoS (for example, different maximum delay and residual error rate).Except less increase, conventional RLC realizes not obtaining revising, because it originates from the part of R-99.Most of Initial R LC assembly comes from the commitment of UMTS exploitation, and does not change from that time.Owing to introduced new physical layer attributes, determined to avoid revising RLC and attempt to solve its restriction in other layer on the contrary.For example, in order to satisfy the needs that unordered (out-of-order) that high-speed downlink packet inserts the protocol Data Unit (PDU) of (HSDPA) receives, need do like this.
R-99 W-CDMA user mode-forbid mechanism guarantees not have pseudo-the re-transmission.R-99 also uses many polling schemes to guarantee to be connected on and receives at least one poll when Status Disable mechanism is being moved.R-99 Status Disable value typically is configured to 40 or 60ms, is longer than the round trip cycle of expectation, can be used for carrying out the limited bandwidth of re-transmission with solution.The existing multiple mechanism that can be used for triggering status report.For example, can be with regular time gap periods ground status report, perhaps can in detecting sequence number sequence, have under the situation of interruption and trigger status report owing to losing PDU.Alternately, can respond the poll of the solicited status report that the transmitting entity from the other end of communication link receives, come the starting state report.For example, poll can be indicated by a bit is set on the RLC-AM head by transmitting entity.
Trigger the use of status report for poll, the mechanism of the transmission of the multiple poll that can be used for starting transmitting entity is arranged.The mechanism that is used for starting poll comprises poll after last PDU of periodic polls, transmission buffer, uses the poll timer, based on the poll of window, each Poll_PDU PDU (protocol Data Unit) afterwards or each Poll_SDU SDU (service data unit) poll afterwards based on counter.These polling trigger work are as follows.For periodic polls, with predetermined periodicity time interval triggering poll.For transmission buffer detection, after last PDU in detecting transmission buffer or in the re-transmission buffer, start poll, for example, poll can be set on the letter head of last PDU in transmission or the re-transmission buffer.Transmission or retransmission buffer headers can be configured to reach this purpose independently.In order to use the poll timer, if the data of being launched after timer expires also do not obtain affirmative acknowledgement, the time internal trigger poll of predetermined fixed amount after previous poll then, the poll timer scheme guarantees under the situation that poll is lost redundancy is arranged.For poll, can after having advanced certain ratio above transmission window, transmission window trigger poll based on window.
Poll for the counter after each Poll_PDU PDU starts after transmission Poll_PDU PDU message, when state variable VT (PDU) reaches the value of the Poll_PDU that is provided with by the upper strata, triggers poll.Whenever transmitting AMD (acknowledged mode data) PDU when (comprising that PDU retransmits), state variable VT (PDU) is added one.Equally, for the poll after each Poll_SDU SDU, after transmission Poll_SDU SDU, when state variable VT (SDU) reaches the value of the Poll_PDU that is provided with by the upper strata, trigger poll.When the AMD PDU of carrying the one SDU fragment is scheduled for when transmission for the first time, the state variable VT (SDU) of given SDU is added one.
The RLC-AM receiving entity is supported many state variables, comprises VR (R), VR (H) and VR (MR).The sequence number that receives according to the order of sequence that state variable VR (R) expression is up-to-date.The beginning of VR (R) mark receiver window.State variable VR (H) is the highest sequence number of all PDU of receiving.State variable VR (MR) will be accepted as effective highest sequence number.The end of VR (MR) mark receiver window.Thereby VR (MR) is configured to VR (R)+RxWindowSize.About term RLC window, receiver window and transmission window, it should be noted that at these terms in the art and sometimes can use interchangeably, although their implication difference.When configuration during RLC, create two measure-alike windows, at the receiver window (be sometimes referred to as and accept window) at receiving entity place with at the transmission window at transmitting entity place.When the PDU that receives according to the order of sequence, accept window and advance.If (for example do not receive PDU in order, disappearance (hole) is arranged) among the PDU of one or more damages, then in the re-transmission that receives the PDU that loses or abandon the PDU that loses and abandoned (for example) before, accept advancing of window and be in wait state if reached maximum retransmission.Whenever transmitting entity receives indication when reaching the correct in order ACK that receives of certain PDU quantity PDU from receiving entity, transmission window advances.Usually use term RLC window to represent general RLC.
As explained above, each the RLC status report in the conventional system need comprise the NAK for detected all disappearances or data slit in the receiver window.Therefore, general networks uses the Status Disable of being longer than the RLC round trip cycle a little.For example, in conventional R-99W-CDMA realized, the Status Disable value typically was configured to 40 to 60ms, is longer than the round trip cycle of expectation.In conventional W-CDMA configuration, during the transfer of data that continues, each RLC transmission primaries status report after two-way time.
The inventor recognizes the shortcoming of only being transmitted the delay that a status report causes by each round trip cycle (RTT).Conventional Status Disable timer in operation no longer the W-CDMA of status report require often to cause the re-transmission of the grouping that damages.Fig. 4 shows the conventional scheme that only transmits a status report for each RTT, is used for the delay of the grouping of the re-transmission that recovers from the PDU that loses or damage.In this example, identifier 401,403,405,407 and 409 expressions are from the status report of receiving entity to the transmitting entity passback.After transmission state report 401, starting state is forbidden timer 421.Realize according to conventional W-CDMA, before 421 expirations of Status Disable timer, do not send any status report.After Status Disable timer 421 has expired, but status report 403 postpones 431 owing to Status Disable timer 421 causes.Identical situation also occurs on all status reports that send among the conventional W-CDMA.After each status report 401-409, starting state is forbidden among the timer 421-427, and is keeping it effective during the RTT or during just over a RTT.Forbid that timer 421-427 prevents to forbid sending next status report before timer 421-427 expires at pending status.Status report 401-409 comprises the NAK at all detected disappearances in each receiver window (for example, for the PDU 411,413 and 415 that damages).
In this example, square frame 411,413 and 415 indications detect three new disappearances in the RLC sequence number.Because among the Status Disable timer 421-427 is effective when detecting each disappearance, so postpone detecting disappearance and transmit to exist between the corresponding N AK in the next status report.Delay for disappearance 411,413 and 415 is shown 431,433 and 435 respectively.Because error of transmission and status report are irrelevant constantly, extra delay is evenly distributed between the value of zero (0) and Status Disable timer.In conventional system, the length of Status Disable timer is configured near RTT.This means the time that detects disappearance and receive total delay between time of re-transmission and equal 1.5 times of round trip cycle on average.It should be noted that this delay only can influence the re-transmission first time of particular hole.If for retransmitting for the first time of disappearance failure, then thereafter for retransmitting for the second time of this disappearance and each subsequently re-transmission will only be delayed a RTT.
For the agreement of carrying out flow process control such as the dependence reflector window of RLC-AM and TCP, acknowledgement transmissions, ACK are used to promote forward transmission window.For the bigger window of size, sending the delay of replying is not very big to Effect on Performance.But, in conventional RLC-AM realizes, no matter whether there is any NAK to report, send ACK with identical frequency.Transmitting entity should be able to be stored many PDU, when in transmission course, not having mistake to guarantee to suppose in that receive can congestion window before making the ACK that window advances.Typically, receiving between the report of two continuums of states, need be by the data volume (for example, maximum cushioning data) of transmitting entity buffering corresponding to the data volume of in two times round trip cycle, launching.The PDU buffering may be than even more important in R-99, because in HSDPA, the RLC window size trends towards more limited in HSDPA.For example, suppose that round trip cycle is that 200ms and PDU size are 320 bits, maximum accessible data transfer rate will be: 2048 * 320/ (2 * 0.2)=1.63Mbps.Under the situation of HSDPA, Status Disable can be configured to less value usually, because when channel conditions was good, residual error rate was very low.Yet if we use identical configuration in whole sub-district, the user in the zone of channel conditions difference will be subjected to a large amount of pseudo-influences that retransmit.
The shortcoming of conventional RLC is that each RTT status report may cause pseudo-the re-transmission more than transmission once.But, status report is restricted to each RTT is no more than once also can be caused advancing the RLC window and send longer delay in the NAK process at the PDU that loses.Conventional RLC realizes comprising many restrictive conditions, and this makes can't regulate NAK and ACK delay.For example, General Status Report comprises the NAK for all disappearances in the sequence number (SN), and, with same speed status report,, do not consider that ACK may not need send so frequently no matter whether have any NAK yet.This requirement that conventional RLC realizes causes pseudo-the re-transmission, unless the status report cycle is greater than round trip cycle.
Each embodiment disclosed herein provides more flexibility by the disappearance in the independently tracked PDU sequence.Except the Status Disable timer (it is applicable to all disappearances) of routine, for each disappearance all provides independently timer.This timer is called as NAK and forbids timer, does not prevent the transmission of status PDU.The NAK that is used for given disappearance forbids that timer prevents that status report in any emission from comprising the NAK about this disappearance, till the NAK that is used for given disappearance forbids that timer expires.The speed in conjunction with permission system definition generation report of poll and Status Disable, the system that also makes can use the PDU status re-port triggers of losing effectively.
Conventional scheme shown in Figure 1A and the 1B, the NAK that sometimes needs transmission (for example, 131,132 and 133) is fewer than the quantity of the NAK (for example, Fig. 5 A-5B, 531,532,533 and 534) of each embodiment transmission disclosed herein.But conventional scheme can not make the delay that sends in the feedback reduce.These embodiment make it possible to weigh feedback delay at the increase of status report quantity more neatly.According to embodiment disclosed herein, send the distribution that more frequent status report transmissions will provide more uniform re-transmission.In addition, the Status Disable timer of each embodiment disclosed herein can be configured to the value shorter than the Status Disable timer of conventional system, and can not increase to the pseudo-probability that retransmits.
ACK is sent back to transmitting entity to report back the up-to-date sequence number that receives according to the order of sequence from receiving entity often, that is to say, to upgrade the initial of RLC window.ACK will typically be included in the status report that comprises NAK.Yet, if according to the window size of being supported, there is not available NAK, may there is no need to trigger the transmission of ACK.For fear of unnecessarily trigger ACK when not having NCK to be sent, each embodiment disclosed herein provides " ACK forbids timer ".This timer can be configured to forbid the value that timer is longer than NAK.If the Status Disable timer moves,, comprise that the status report of NAK can only be delayed if perhaps their relevant NAK forbids that timer is still not yet due.Yet,, have only the status report (that is, only have ACK and do not have the status report of NAK) of ACK to be delayed if Status Disable timer or ACK forbid that timer moves.Because NAK forbids that timer is the NAK special use among each embodiment, so it will can not influence the transmission of the status report that has different N AK or any ACK.
Fig. 5 A-B shows the each side according to the scheme that is used to packet radio that recover to lose or damage of each embodiment disclosed herein.Fig. 5 A shows NAK and forbids timer, the status report, the NAK that be illustrated in the poll that receives from transmitting entity 520 at receiving entity place, the grouping 501-505 that loses, NAK531-534 are beamed back transmitting entity forbid timer 541-544, and the exemplary time relationship between the grouping 511-515 that retransmits.Time slot 501-505 is illustrated in the grouping of the damage at receiving entity place.And Fig. 5 A shows each the signal 501-520 that receives at the receiving entity place, and Fig. 5 B shows the NAK531-534 that is sent out between receiving entity and the transmitting entity and retransmits 511-515.For for simplicity, when explaining that in conjunction with Fig. 5 A and 5B NAK forbids timer, do not consider that ACK forbids timer and Status Disable timer.Forbid timer and Status Disable timer below in conjunction with Fig. 6 A and 6B discussion ACK.
After determining that grouping (for example, grouping 501) is damaged, receiving entity will comprise that the status report of the NAK531 of the re-transmission of indicating transmitting entity to start the grouping 501 that damages is sent back to transmitting entity.For fear of triggering pseudo-the re-transmission, start NAK and forbid timer 541.According to each embodiment, when sending the status report that comprises NAK, start NAK immediately and forbid timer.Different with the Status Disable timer that conventional W-CDMA realizes, NAK disclosed herein forbids that timer is the NAK special use.As the NAK special use, NAK forbids that timer only prevents other NAK for the PDU of particular lost, if perhaps there is the disappearance among the PDU that plurality of continuous loses, NAK forbids that timer prevents to be used for other the NAK of the PDU that loses continuously of this disappearance, till NAK forbids timer expiry.As used herein, forbidding as the NAK of NAK special use that timer can be said to be with the grouping of one or more damages is associated, and therefore, other any NAK that is not used in the grouping of these one or more damages will be sent out, till NAK forbids that timer expires.This prevents fully that with the routine techniques field the general Status Disable timer of any other status report till timer expires is different.
As shown in Figure 5, when sending from receiving entity when comprising the status report of NAK531, starting state is forbidden timer 541 immediately, thereby prevents to forbid at NAK other NAK of the grouping 501 that transmission is used to damage before timer 541 expires.Yet, because NAK forbids that timer 541 is NAK special uses, be NAK with respect to the grouping 501 that is used to damage, other NAK of PDU that is used for other damage is not interrupted.Therefore, after the PDU 502 that detects damage, receiving entity can send NAK532, and no matter NAK forbids that whether timer 541 is still in operation.When NAK forbids that timer is moving,, the poll that receives from transmitting entity is not necessarily because of considering that NAK forbids that timer is uncared-for.As mentioned above, if there is the disappearance of two or more PDU that lose continuously, NAK forbids that timer prevents other the NAK of the PDU that loses continuously that is used for this disappearance before NAK forbids timer expiry.For example, the PDU 504 and 505 of damage causes the disappearance of two PDU that lose continuously.In certain embodiments, by sending out the grouping 504 that is used for two damages and 505 single NAK 534, rather than send out two NAK, thereby saved expense.In this example, single NAK forbids that timer 544 can be activated and is used for NAK 534, report this disappearance damage grouping 504-505 the two.NAK forbids that timer 544 can be considered to that the two all is associated with the PDU 504 that loses with the PDU that loses 505, thereby prevents to forbid sending any one other NAK that is used for these two PDU that lose before timer 544 expires at NAK.
About the transmission of status report, particularly send the timing of the NAK of the grouping be used to damage, usually, will be after receiving the poll that sends from transmitting entity status report.Yet, in various enforcements, can after detecting the PDU of damage, send and comprise the status report of NAK, and needn't wait to be polled.For example, in W-CDMA, " missing PDUindicator " option can be configured to send the NAK of the PDU that is used for newfound damage, and needn't wait to be polled.Even be configured to not wait under the situation of to be polled and transmission NAK at this option, can forbid that timer postpones NAK by pending status.
The NAK that Fig. 6 A shows according to each embodiment forbids that timer, ACK forbid the interaction between timer and the Status Disable timer.The figure shows three types timer, NAK forbids timer 641-642, Status Disable timer 650, and ACK forbids timer 661-663.NAK forbids that timer is the NAK special use.This means, in case sent NAK, before NAK forbade timer expiry, the NAK timer prevented to transmit any other NAK that is used for forbidding with NAK the PDU of the damage that timer is associated, but it does not prevent to transmit the NAK that is used for other PDU that loses.The NAK of the NAK special use that is associated with a PDU who loses forbids that timer does not prevent to send the NAK that is used for the different PDU that loses.NAK forbids that timer is configured to a little usually more than a RTT (for example, sometimes, than the long 20-100ms of RTT).On the other hand, the Status Disable timer is not the NAK special use.The Status Disable timer remains on it and does not send any status report before overtime.Therefore, if NAK to be sent is arranged, NAK is delayed before pending status is forbidden timer expiry.The Status Disable timer can be configured to length any time, but according to each embodiment, the time that typically is configured to goes up shorter a little than RTT.In this way, frequent updating is used for the state variable VR (R) of the up-to-date sequence number that receives according to the order of sequence (expression receiver window initial), thereby moves the RLC window in mode timely.The ACK timer prevents to transmit the status report that only comprises ACK and do not comprise NAK before unsettled ACK timer expiry.Yet the ACK timer does not prevent or postpones to comprise the status report of NAK.In addition, in certain embodiments, if there is NAK to be sent, with status report (because ACK timer do not postpone NAK), and the status report that NAK promoted can also also comprise ACK, because it all will be sent out in any case.
When receiving PDU, according to channel conditions, receiving entity can detect the grouping (for example, PDU 601 and 602) of damage often.In some implementations,, also can send NAK at once, and in other was realized, receiving entity can receive the transmission of restarting NAK after the next poll by the time even as yet not from the transmitter receipt to the poll.Yet, in any in these two realizations,, will not send the status report that comprises NAK if exist effective pending status to forbid timer.In the example shown in Fig. 6 A,, do not send the NAK 631 of the PDU 601 that is used to damage at once because Status Disable timer 651 is unsettled.The NAK 631 of the PDU601 that Status Disable timer 651 was used to damage in times 691 place's delay before it is overtime.Should be noted that at times 691 place, ACK forbids that timer 661 is unsettled.Yet, because ACK forbids that timer does not postpone or influence the transmission of NAK, even ACK forbids that timer 661 is current and moves the NAK of the grouping 601 that also transmission is used to damage.In addition, the status report that comprises NAK 631 may (in certain embodiments) also comprise ACK, even ACK timer 661 is effective.Because the status report that starts for NAK 631 will be sent out away, do not increase expense so send ACK with status report.In certain embodiments, if in the status report that sends, ACK is with NAK, and ACK forbids that timer is effective, and then ACK forbids that timer can be reset.
In conventional system, the Status Disable timer is generally equal to, perhaps less times greater than RTT.According to each embodiment disclosed herein, the time span of Status Disable timer can be significantly smaller than RTT, common little several times (for example, the Status Disable timer 650).Fig. 6 A shows NAK and forbids that timer (641-642) is about two and 1/2nd times of Status Disable timer, and ACK forbids that timer is illustrated as three times exemplary cases of Status Disable timer.By having the Status Disable timer that is shorter than RTT greatly, each embodiment can upgrade the state variable VR (R) that is used for the up-to-date sequence number that receives according to the order of sequence, thereby maintenance RLC window moves forward and do not postpone.
Fig. 7 shows a kind of method that is used for controlling links according to various embodiments of the present invention.This method starts from 701 and advance to 705,705, detects PDU.705, expectation be at the receiving entity place, receive data from transmitting entity in section, time slot or the TTI (Transmission Time Interval) at the fixed time.For example, can expect that receiving entity (for example, the UE 210 of Fig. 2) receives packet from transmitting entity (for example, Node B 220) in particular time-slot (for example, 501 of Fig. 5 A).The unnecessary travelling carriage that is restricted to of receiving entity.Receiving entity can be fixed radio station (for example, the land line phone 260 of Node B 220 or Fig. 2), and transmitting entity can be another fixed radio station or travelling carriage.The particular radio station of carrying out two-way communication will be the receiving entity of some PDU and the transmitting entity of other PDU.After the detection, no matter whether received PDU, this method advances to 707 from 705.
In 707, receiving entity determines that PDU still is damaged (for example, 501-505) by correct receive (for example, 511 of Fig. 5 or 580).The correct grouping that receives can be the grouping that retransmits (for example, 511-515), also can be the grouping of transmission for the first time, that is, the grouping of initial transmission (for example, 580 of Fig. 5 and unlabelled other grouping).In addition, the correct grouping that receives can be that the result of the grouping of recovery has been carried out in the error correction of still having used that has comprised the data of damage.The data that the grouping (being sometimes referred to as the grouping of losing) that damages can comprise mistake or can not translate perhaps may not be received fully.Part as 707, in certain embodiments, but receiving entity execution error verification is to determine whether PDU is damaged.Error checking can relate to some error checking routines or algorithm (for example, such as verification and redundancy check, cyclic redundancy check (CRC), Frame Check Sequence (FCS) or such as the error detection or the detection/checkschema of error-checking code (ECC), Reed-Solomon sign indicating number, Reed-Muller sign indicating number, Binary Golay sign indicating number, convolution code, turbo sign indicating number or other similar type of Hamming code) in any.Check that in square frame 707 PDU still is to be damaged to limit following action by correct the reception, such as, carry out the implicit expression estimation of channel measurement or the power measurement that receives, the mobile unit quality of reception or the routine or the error checking of other similar type in the reception known to a person of ordinary skill in the art.If, in 707, determine that PDU is damaged, then method advances to 709 and carries out the NAK step.The NAK step of square frame 709 will be discussed in Fig. 8 in further detail.
When the NAK of square frame 709 step had been finished, method just advanced to 711 to carry out the ACK counter procedure.Some embodiment may realize the ACK counter procedure, and other embodiment may not can realize this step.Directly do not advance to 703 from 709 if do not realize ACK counter procedure method, 703, whether the communication of determining finishes.For the embodiment that realizes the ACK counter procedure, carry out the step of square frame 711.The ACK counter procedure of square frame 711 will be discussed in Figure 10 in further detail.When the ACK counter procedure had been finished, method just advanced to 703.
Return 707, correctly received if be defined as PDU, then method advances to 713,713, determines that the PDU that receives is the new data of initial transmission or the previous impaired data that retransmit.If be judged as PDU is new data, and then method advances to 715 and carries out the ACK step.If in 713, the PDU that is defined as receiving is the previous impaired data that retransmit, method advances to 719.In 719, if the NAK that is associated with re-transmission forbids that timer moves, then this transmission is stopped and is removed.Because received the grouping of re-transmission, thus no longer need any NAK that is associated with the grouping of the re-transmission of queued for transmission once, and therefore it is abandoned and does not send.Method advances to 715 from 719.715 ACK step will be discussed in Fig. 9 in further detail.The result or the ACK of 715 ACK step are transmitted, or forbid that at ACK ACK is just in queued for transmission when ACK forbids that timer expires under the effective situation of timer.
When 715 ACK step was finished, method advanced to 717, to determine whether exist any overdue NAK to forbid timer from the grouping of the previous damage that does not receive re-transmission as yet.Although in receiving entity inside, NAK forbids that timer can be configured to any value, preferably NAK is forbidden that usually timer is arranged to less times greater than a round trip cycle (RTT).RTT is that NAK is sent back to transmitting entity, is launched entity handles, makes transmitting entity send the expected time that retransmits to receiving entity then.The RTT value can depend on channel conditions to a certain extent, perhaps by land under the situation of order wire, can depend on the communication route of signal to a certain extent.NAK is forbidden that timer is arranged to will to avoid pseudo-less times greater than a RTT and retransmits, that is to say, even avoided being provided with ongoing re-transmission, by one or more extra, the unnecessary retransmission that send that other NAK causes by early stage NAK.Therefore, NAK forbids that timer typically is configured to an about RTT, perhaps less times greater than a RTT.For example, NAK forbids that timer can be configured to RTT and add other Transmission Time Interval (TTI), RTT+2 * TII, and RTT+3 * TII if perhaps situation allows, may be arranged to longer time setting.In certain embodiments, NAK forbids that timer setting can be measured as the percentage of RTT, for example, and 110% etc.No matter how the value of timer is provided with, when the NAK of the PDU that is used for specific damage forbids that timer expires, just can send the PDU that another NAK is used for this particular corrupted.May cause pseudo-the re-transmission once in a while although send second NAK (perhaps follow-up NAK), forbid that by NAK the delay of the NAK that transmission that timer causes is other will greatly reduce the generation of pseudo-re-transmission.
If, in 717, be defined as existing matured NAK to forbid timer, therefore also do not receive (perhaps impaired) and retransmit, method advances to 721 along " YES " branch from 717.In some systems, for example,, may there be the restriction of the NAK quantity that the grouping for specific damage is sent for fear of blocking communication.In this system, square frame 721 determines whether to have sent for this grouping the NAK of maximum quantity.Otherwise method advances to 709 along " NO " branch from 721, to carry out the NAK step and to be that the grouping of damage starts another NAK.If, in 721, being defined as having sent the re-transmission of maximum quantity, method is advanced to carry out the wrong step 723 from 721 along " YES " branch.The mistake step can be carried out the error reporting to system, and may use from the data of adjacent packets and carry out error-recovery routines or data interpolating, measures to fill the PDU disappearance as stop gap.Alternately, the time slot of damage can be left empty.Finish in 723 after the erroneous procedures, method advances to 703.
Fig. 8 shows the method that is used to start NAK as the part of controlling links according to various embodiments of the present invention.Especially, Fig. 8 shows the details of the NAK step of the square frame 709 among Fig. 7.Like this, 801 of Fig. 8 typically Fig. 7 707 or 721 after carry out.If 801 carry out after 721, the NAK that then will not have the NAK special use that is damaged packet that effectively is used for handling forbids timer, forbids that timer expires because be defined as previous NAK in 717.In 801, determine whether to exist the effective NAK that will prevent in response to detecting the grouping of damage in 707 and send out NAK to forbid timer.Because grouping or the initial transmission damaged, it does not have NAK to forbid timer, or the grouping of the damage that is retransmitted, and its NAK forbids that timer has expired or approaching expiring, so do not have unsettled NAK to forbid timer through regular meeting.Can detect identity those situations for retransmitting of the grouping of damage for receiving entity, owing to there is no need another NAK of further delayed delivery, receiving entity can stop NAK and forbid the remaining time of timer.
If, in 801, be defined as existing effective NAK to forbid timer, method advances to 803 along " YES " branch from 801, so that NAK waits in line to forbid after timer expires that at NAK the time a little later sends.In certain embodiments, NAK can forbid that timer expires and is sent out in response to NAK, and in other embodiments of the invention, after determining the NAK that existence will send, can check that unsettled NAK forbids timer,, then send NAK if find not exist unsettled NAK to forbid timer.When NAK waited in line to send in 803, method advanced to 703 of Fig. 7.If, in 801, be defined as not having effective NAK to forbid timer, method advances to 805 along " NO " branch from 801.
In 805, determine whether to exist the unsettled Status Disable timer of the status report that will prevent to send any NAK of comprising.The Status Disable timer, it is not any specific cluster or NAK special use, typically is configured to be shorter than RTT a little, so that responsiveness more moves forward the RLC window in the highland.Typically, the Status Disable timer can be configured to 1/2nd to 1/10th times of RTT.Terrifically, the Status Disable timer should be configured to be no more than a RTT and be no less than a time slot width.If in 805, it is effective to be defined as the Status Disable timer, method advances to 803 along " YES " branch from 805, so that NAK waits in line to send when the Status Disable timer does not rerun.If, in 805, being defined as not having effective Status Disable timer, method advances to 807 along " NO " branch from 805.In square frame 807, launch NAK from receiving entity to transmitting entity, and method advances to 703 of Fig. 7.
Fig. 9 shows the method that is used to start ACK as the part of controlling links according to various embodiments of the present invention.Especially, Fig. 9 shows the details of ACK step of the square frame 715 of Fig. 7.Like this, 901 of Fig. 9 typically Fig. 7 713 or 719 after carry out.In 901, determine the distance that the RLC window is moved, that is to say that all PDU are received (comprising re-transmission) to which time slot, perhaps occupied in other cases which time slot of using by correct.The sequence number that receives according to the order of sequence that state variable VR (R) expression is up-to-date, mark the beginning of receiver window.For example, based on the value of state variable VR (R), square frame 901 determines how far window can be moved.The last correct time slot or the HARQ moment that receives continuous P DU is the moment that will send ACK.In status report, only need to reply a PDU.Typically, suppose prearranged agreement, correctly received prior to all PDU of a PUD of appointment among the ACK.In some other embodiment, this can realize in cumbersome mode by listing all PDU that receive rather than specifying the PDU of last correct reception to move forward window.In 901, when the distance of decision moving window and the PDU that will reply, method advances to 903.
In 903, determine whether to exist effective ACK to forbid timer.In receiving entity inside, according to messaging parameter and the order of data in time, ACK forbids that the value of timer can be configured to wide scope arbitrarily.For example, for than higher data rate, ACK forbids that the value of timer can be configured to be shorter than a little a RTT, so that responsiveness is more pushed ahead the receiver window in the highland.On the other hand, for lower data rate, ACK forbids that timer can be configured to forbid the longer value of timer (it is configured to usually less times greater than a RTT) than NAK, particularly, and under the situation that does not have the urgent demand of pushing ahead the receiver window.In addition,, be used for the value that ACK forbids timer and can be configured to bigger value, play the effect that stop gap is measured because ACK forbids timer if realized the ACK timer.
If, in 903, being defined as ACK and forbidding that timer moves, method advances to 905 along " YES " branch from 903, so that ACK waits in line transmission when ACK forbids that timer is overdue.In certain embodiments, ACK can forbid that timer expires and sends in response to ACK, and in further embodiments, receiving entity after determining there is ACK to be sent, can check that unsettled ACK forbids timer, if and find not exist, then send ACK.When ACK waited in line to send in 905, method advanced to 717 of Fig. 7.If, in 903, be defined as not existing effective ACK to forbid timer, method advances to 907 along " NO " branch from 903.
In 907, determine whether to exist the unsettled Status Disable timer of the status report that will prevent to send any ACK of comprising.The Status Disable timer is current to be moved if be defined as, and method advances to 905 along " YES " branch from 907, so that ACK waits in line to send when the Status Disable timer does not rerun.If, in 907, being defined as not existing effective Status Disable timer, method advances to 909 along " NO " branch from 907.In square frame 909, launch ACK from receiving entity to transmitting entity, and method advances to 717 of Fig. 7.909 or in 905, if forbidding the timer setting, new ACK is determined for main situation, then its ACK via 909 or 905 is sent to transmitting entity.
Figure 10 shows the ACK counter procedure according to each embodiment disclosed herein, and this step can be used for regulating ACK reporting period.Especially, Figure 10 shows the details of ACK counter procedure of the square frame 711 of Fig. 7.The square frame 1001 of Figure 10 typically Fig. 7 709 after carry out.If the ACK counter is effective, ACK forbids that timer can be configured to long value, because the ACK function of reporting is started by the ACK counter basically.
The ACK counter is regulated ACK reporting period, with adjustment current data transmission rate, thereby promotes to keep the RLC window to front slide effectively.Under the situation that does not have the ACK counter, when transmission conditions changed, for example, under the situation that transmitted data rates changes, transmitting entity forbade that with new ACK timer value sends receiving entity to.Do not forbid timer if correspondingly do not adjust ACK when data rate changes, the RLC treating capacity may be restricted even may stop.For example, forbid that at ACK timer is configured under the situation of bigger value and data rate increase suddenly, the RLC treating capacity will become limited.Equally, getting back to from receiving entity on the direction of transmitting entity, very big signaling load may occur not necessarily, for example, forbidding that at ACK timer is configured under the situation of lower value and speed reduction suddenly.
Be arranged to for the invalid value of transmitted data rates for fear of ACK being forbidden timer, each embodiment disclosed herein has the ACK_Counter variable, this variable allow receiving entity follow the tracks of VR (R) value from report once that the ACK value begins during the amount that increased.Since the sequence number that receives according to the order of sequence that state variable VR (R) expression is up-to-date, the degree that ACK counter indication receiver window is filled.If ACK_Counter has surpassed predetermined threshold value, can report ACK in the status report next time, thereby avoid aforesaid performance deficiency.This threshold value can be defined as increasing along with each data rate, perhaps is defined as the percentage of the receiver window size that disposed.
State variable VR (R) is illustrated in the up-to-date PDU that receives according to the order of sequence in receiving entity place.When each another continuous P DU was correctly received at the receiving entity place, state variable VR (R) added one.At 1001 of Figure 10, determine whether VR (R) has reached threshold value.This threshold value can be defined as the receiver that disposed or the percentage of RLC window size, such as from 10% to 50% of receive window.Alternately, can use the less of other window size of being suitable for the controlling links condition or big percentage, for example, go up to window size 80% or bigger.If, in 1001, being defined as VR (R) and having reached threshold value, method advances to 1003 along " YES " path from 1001.In 1003, determine that the new ACK that is suitable for communication condition forbids the timer setting, is sent to transmitting entity with it via ACK then.When comprise forbid timer for ACK the ACK of adjusting when receiving entity is sent to transmitting entity, method is returned 703 of Fig. 7 from 1003.One of advantage of using the ACK counter is that the frequency of ACK report can easily adapt to rate conditions now.For than higher transmitted data rates, ACK will be reported more continually, makes the RLC window advance sooner.If speed significantly reduces, can be adjusted to and not report ACK so continually, thus the signaling load on reducing in the other direction.For fear of the situation of never reporting the ACK value, can keep the ACK that describes in conjunction with Fig. 9 and forbid timer.Keep ACK to be configured to bigger value reporting period and can not make the very big amount of system feedback resource burden.We can say, when the ACK counter is activated, can consider to forbid that with ACK timer is as the ACK maximum constrained value of reporting period.Equally, for peak data rate, can retrain ACK report lower-frequency limit with the Status Disable timer.
Accompanying drawing provides in order to explanation and makes the present invention to realize, and shows principle of the present invention.Shown in the method block diagram of accompanying drawing some are put into practice activity of the present invention and can be carried out according to order shown in the drawings, also can omit fully.For example, in Fig. 7, whether the communication of determining finishes (703) can occur in the identical time, also can occur in and detect next PDU (705) afterwards.Equally, in certain embodiments, ACK counter procedure (711) can be carried out before in NAK step (709), in further embodiments, carries out afterwards detecting next PDU (705), perhaps can not carry out in certain embodiments.
Those skilled in the art are appreciated that and can use in various different process and the technology any one to come expression information and signal.For example, top specification in the whole text in mentioned data, instruction, order, information, signal, bit, symbol and chip, can use voltage, electric current, electromagnetic wave, magnetic field or magnetic particle, light field and light particle, perhaps their combination in any is represented.Those technical staff in the art it can also be appreciated that in conjunction with the described various illustrative logical blocks of embodiment disclosed herein, module, circuit and algorithm steps can be implemented as electronic hardware, computer software or both combinations.For the interchangeability of hardware and software clearly is described, the function of various example components, program block, module, circuit and step has been described prevailingly hereinbefore.It still is that software depends on application-specific and the design constraint that is subjected on whole system that this function is embodied as hardware.The technical staff can be each application-specific and realizes described function with distinct methods, and this realization decision should not be considered to cause and departs from scope of the present invention.
Can or being designed to carry out herein by general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components in conjunction with various illustrative logical blocks, module and the circuit of embodiment disclosed herein explanation, its any combination of described function realizes or carries out.General processor can be a microprocessor, but replacedly, processor can be any conventional processors, controller, microcontroller or state machine.Processor also can be implemented as computing equipment, for example, and the combination of DSP and microprocessor, a plurality of microprocessor, one or more microprocessor or any other this configuration with DSP core.
Method or technology in conjunction with embodiment explanation disclosed herein can directly be embodied as hardware, the software module of processor execution or both combinations.Software module can be positioned at other form of the storage medium known to RAM memory, flash memories, ROM memory, eprom memory, eeprom memory, register, hard disk, removable hard disk, CD-ROM or any present technique field.Exemplary storage medium is connected to processor, makes the processor can be from read information, and information is write storage medium.Replacedly, storage medium can be integrated into processor.Processor and storage medium can be arranged in ASIC.ASIC can be arranged in user terminal.Replacedly, processor and storage medium can be arranged in user terminal as discrete assembly.
" exemplary " used herein this speech is meant " example or explanation as an example, ".The conduct of Miao Shuing " exemplary " embodiment and feature there is no need to be considered to preferred or more have superiority than other embodiments of the invention or feature herein.
Provide the explanation before of disclosed embodiment so that any technical staff in the art implements or use the present invention.Is that significantly Ding Yi general principle can be applied to other embodiment and can not depart from the spirit or scope of the present invention herein to the various changes of these embodiment for those technical staff in present technique field.Therefore, the present invention is not intended to the embodiment shown in being limited to herein, but meets and principle disclosed herein and the consistent widest range of novel characteristics.
Claims (31)
1. method of controlling communication link, described method comprises:
In the grouping of receiving entity place detection from the damage of transmitting entity;
Send negative response (NAK) to described transmitting entity; With
In response to the transmission of described NAK, start the NAK that is associated with the grouping of described damage and forbid timer;
Wherein, described NAK forbids that the other NAK that timer prevents to be used for the grouping of described damage is sent out, till described NAK forbids that timer has expired.
2. the method for claim 1, wherein before described NAK forbids that timer expires, described NAK forbids that other NAK that timer allows to be used for the grouping of other damage is sent out.
3. the method for claim 1, wherein described NAK forbids that timer is initially set to operation at least one round trip cycle (RTT).
4. the method for claim 1, wherein the grouping of described damage is first grouping that damages, and described NAK is a NAK, and described NAK forbids that timer is that a NAK forbids timer, and described method also comprises:
Before a described NAK who is associated with described first grouping that damages forbids that timer has expired, send the 2nd NAK that is associated with second grouping that damages to described transmitting entity; With
The 2nd NAK that is associated with described second grouping that damages is set forbids timer.
5. the method for claim 1 also comprises:
At the poll of described receiving entity place reception from described transmitting entity; With
In response to described poll, before described NAK forbids that timer expires, from described receiving entity to described transmitting entity status report;
Wherein, described status report does not comprise the described other NAK that is associated with the grouping of described damage.
6. method as claimed in claim 4, wherein, the two is transmitted wirelessly described transmitting entity a described NAK and described the 2nd NAK.
7. method as claimed in claim 4, wherein, the two is transmitted wirelessly described transmitting entity according to the W-CDMA agreement a described NAK and described the 2nd NAK.
8. the method for claim 1 also comprises:
Before the grouping that detects described damage, starting state is forbidden timer, and described Status Disable timer has than described NAK forbids the duration that timer is shorter;
Postpone the transmission of described NAK, till described Status Disable timer expires.
9. method as claimed in claim 8 also comprises:
Status report;
Wherein, described status report comprises ACK and described NAK; And
Wherein, described Status Disable timer postpones the transmission of described status report, till described Status Disable timer has expired.
10. the method for claim 1 also comprises:
Start ACK and forbid timer; With
Delay only has the transmission of the status report of ACK, till described ACK forbids that timer expires.
11. the method for claim 1 also comprises:
When from described receiving entity when described transmitting entity sends an ACK, start the ACK counter; With
If described ACK counter reaches predefined threshold value, then send the 2nd ACK.
12. method as claimed in claim 11, wherein, described predefined threshold value is defined as the percentage of receiver window width.
13. the method for claim 1, wherein the grouping of described damage is first grouping that damages, next continuous grouping is second grouping that damages, and described method also comprises:
Send described NAK to described transmitting entity, report described first and described second grouping that damages;
Wherein, described NAK forbids that timer is associated with described first and described second grouping that damages.
14. a computer-readable medium, it realizes the method for control communication link, and described method comprises:
In the grouping of receiving entity place detection from the damage of transmitting entity;
Send negative response (NAK) to described transmitting entity; With
In response to the transmission of described NAK, start the NAK that is associated with the grouping of described damage and forbid timer;
Wherein, described NAK forbids that the other NAK that timer prevents to be used for the grouping of described damage is sent out, till described NAK forbids that timer has expired.
15. computer-readable medium as claimed in claim 14, wherein, before described NAK forbade that timer expires, described NAK forbade that other NAK that timer allows to be used for the grouping of other damage is sent out.
16. computer-readable medium as claimed in claim 14, wherein, described NAK forbids that timer is initially set to operation at least one round trip cycle (RTT).
17. computer-readable medium as claimed in claim 14, wherein, the grouping of described damage is first grouping that damages, and described NAK is a NAK, and described NAK forbids that timer is that a NAK forbids timer, and described method also comprises:
Before a described NAK who is associated with described first grouping that damages forbids that timer has expired, send the 2nd NAK that is associated with second grouping that damages to described transmitting entity; With
The 2nd NAK that is associated with described second grouping that damages is set forbids timer.
18. computer-readable medium as claimed in claim 14 also comprises:
At the poll of described receiving entity place reception from described transmitting entity; With
In response to described poll, before described NAK forbids that timer expires, from described receiving entity to described transmitting entity status report;
Wherein, described status report does not comprise the described other NAK that is associated with the grouping of described damage.
19. computer-readable medium as claimed in claim 17, wherein, the two is transmitted wirelessly described transmitting entity a described NAK and described the 2nd NAK.
20. computer-readable medium as claimed in claim 17, wherein, the two is transmitted wirelessly described transmitting entity according to the W-CDMA agreement a described NAK and described the 2nd NAK.
21. computer-readable medium as claimed in claim 14 also comprises:
Starting state is forbidden timer before the grouping that detects described damage, and described Status Disable timer has than described NAK forbids the duration that timer is shorter;
Postpone the transmission of described NAK, till described Status Disable timer expires.
22. computer-readable medium as claimed in claim 21 also comprises:
Status report;
Wherein, described status report comprises ACK and described NAK; And
Wherein, described Status Disable timer postpones the transmission of described status report, till described Status Disable timer has expired.
23. computer-readable medium as claimed in claim 21 also comprises:
Start ACK and forbid timer, described ACK forbids that timer has than described NAK and forbids the duration that timer is longer; With
Delay only has the transmission of the status report of ACK, till described ACK forbids that timer expires.
24. computer-readable medium as claimed in claim 14 also comprises:
When from described receiving entity when described transmitting entity sends an ACK, start the ACK counter; With
If described ACK counter reaches predefined threshold value, then send the 2nd ACK.
25. computer-readable medium as claimed in claim 24, wherein, described predefined threshold value is defined as the percentage of receiver window width.
26. a receiving entity, it is configured to receive grouping via communication link, and described receiving entity comprises:
Acceptor circuit, it is configured to detect the grouping from the damage of transmitting entity reception;
Transmitter circuit, it is configured to send negative response (NAK) to described transmitting entity; With
NAK forbids timer, and it is associated with the grouping of described damage, and described NAK forbids that timer is activated in response to the transmission of described NAK;
Wherein, described NAK forbids that the other NAK that timer prevents to be used for the grouping of described damage is sent out, till described NAK forbids that timer has expired.
Wherein, before described NAK forbade that timer expires, described NAK forbade that other NAK that timer allows to be used for the grouping of other damage is sent out.
27. receiving entity as claimed in claim 26, wherein, described transmitter circuit wirelessly sends described NAK to described transmitting entity.
28. receiving entity as claimed in claim 26 also comprises:
The Status Disable timer, it is configured to have than described NAK forbids the duration that timer is shorter;
Wherein, when being activated, described Status Disable timer is configured to postpone the transmission of described NAK, till described Status Disable timer expires.
29. receiving entity as claimed in claim 26 also comprises:
ACK forbids timer, and it is configured to have than described NAK forbids the duration that timer is longer;
Wherein, when being activated, described ACK forbids that timer is configured to postpone only have the transmission of the status report of ACK, till described ACK forbids that timer expires.
30. receiving entity as claimed in claim 26 also comprises:
The ACK counter, it is configured to when being activated when described transmitting entity sends an ACK from described receiving entity;
Wherein, reach predefined threshold value then send the 2nd ACK if described ACK counter is configured to described ACK counter.
31. receiving entity as claimed in claim 30, wherein, described predefined threshold value is defined as the percentage of receiver window width.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US58045804P | 2004-06-16 | 2004-06-16 | |
| US60/580,458 | 2004-06-16 | ||
| US60/677,975 | 2005-05-04 | ||
| US11/149,771 | 2005-06-10 |
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| Publication Number | Publication Date |
|---|---|
| CN1989721A true CN1989721A (en) | 2007-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200580025374 Pending CN1989721A (en) | 2004-06-16 | 2005-06-14 | Method and apparatus for link control in wireless communications |
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| Country | Link |
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| CN (1) | CN1989721A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009039730A1 (en) * | 2007-09-25 | 2009-04-02 | Zte Corporation | A method for triggering status report of automatic repeat request |
| WO2013139165A1 (en) * | 2012-03-21 | 2013-09-26 | 华为技术有限公司 | Acknowledgement packet processing method, device and system |
| CN105432036A (en) * | 2013-07-17 | 2016-03-23 | 高通股份有限公司 | Methods and apparatus for dynamic transmission of retransmission requests |
| CN107148762A (en) * | 2014-10-31 | 2017-09-08 | 高通股份有限公司 | Forbid timer for partial status report come disabled status |
| CN103718494B (en) * | 2011-08-05 | 2018-01-23 | 瑞典爱立信有限公司 | RLC state reports for eight carrier HSDPAs |
| CN110289937A (en) * | 2018-03-19 | 2019-09-27 | 迈络思科技有限公司 | Postpone the not ready negative response of responder |
| CN111684746A (en) * | 2018-02-14 | 2020-09-18 | 瑞典爱立信有限公司 | NR RLC segmented concatenation |
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2005
- 2005-06-14 CN CN 200580025374 patent/CN1989721A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009039730A1 (en) * | 2007-09-25 | 2009-04-02 | Zte Corporation | A method for triggering status report of automatic repeat request |
| CN101127587B (en) * | 2007-09-25 | 2011-12-28 | 中兴通讯股份有限公司 | A method for triggering automatic retransfer request status report |
| US8989059B2 (en) | 2007-09-25 | 2015-03-24 | Zte Corporation | Method for triggering a status report of automatic repeat request |
| US10462690B2 (en) | 2011-08-05 | 2019-10-29 | Telefonaktiebolaget Lm Ericsson (Publ) | RLC status reporting for eight-carrier HSDPA |
| CN103718494B (en) * | 2011-08-05 | 2018-01-23 | 瑞典爱立信有限公司 | RLC state reports for eight carrier HSDPAs |
| CN104137495B (en) * | 2012-03-21 | 2017-10-27 | 华为技术有限公司 | Confirm processing method, equipment and the system of bag |
| US9602410B2 (en) | 2012-03-21 | 2017-03-21 | Huawei Technologies Co., Ltd. | Method, device, and system for processing acknowledgement packet |
| CN104137495A (en) * | 2012-03-21 | 2014-11-05 | 华为技术有限公司 | Acknowledgement packet processing method, device and system |
| WO2013139165A1 (en) * | 2012-03-21 | 2013-09-26 | 华为技术有限公司 | Acknowledgement packet processing method, device and system |
| CN105432036A (en) * | 2013-07-17 | 2016-03-23 | 高通股份有限公司 | Methods and apparatus for dynamic transmission of retransmission requests |
| CN105432036B (en) * | 2013-07-17 | 2019-12-06 | 高通股份有限公司 | Method and apparatus for dynamic transmission of retransmission requests |
| CN107148762A (en) * | 2014-10-31 | 2017-09-08 | 高通股份有限公司 | Forbid timer for partial status report come disabled status |
| CN111684746A (en) * | 2018-02-14 | 2020-09-18 | 瑞典爱立信有限公司 | NR RLC segmented concatenation |
| CN111684746B (en) * | 2018-02-14 | 2024-03-29 | 瑞典爱立信有限公司 | Method, transmitter and computer readable medium for transmitting RLC SDUs |
| CN110289937A (en) * | 2018-03-19 | 2019-09-27 | 迈络思科技有限公司 | Postpone the not ready negative response of responder |
| CN110289937B (en) * | 2018-03-19 | 2023-11-03 | 迈络思科技有限公司 | Delayed responder not ready negative acknowledgement |
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