CN1771685A - Method for discarding the service data unit in the acknowledgement mode of the RLC protocol and its device - Google Patents
Method for discarding the service data unit in the acknowledgement mode of the RLC protocol and its device Download PDFInfo
- Publication number
- CN1771685A CN1771685A CNA038264757A CN03826475A CN1771685A CN 1771685 A CN1771685 A CN 1771685A CN A038264757 A CNA038264757 A CN A038264757A CN 03826475 A CN03826475 A CN 03826475A CN 1771685 A CN1771685 A CN 1771685A
- Authority
- CN
- China
- Prior art keywords
- sdu
- rlc
- rlc layer
- pdu
- retransmissions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1848—Time-out mechanisms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/02—Data link layer protocols
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Communication Control (AREA)
Abstract
A method is provided for discarding the service data units in the acknowledgement mode of the radio link control (RLC) of the wireless communications systems, including the steps of, A) processing the SDU in the RLC layer from the higher protocol layer, the protocol data unit in each RLC layer then is formed; B) the PDU in each RLC layer corresponding to the SDU is primitively transmitted and/or retransmitted to the peer layer, and judged whether it meets the predetermined condition of discarding the SDU; C) if the said predetermined condition of discarding the SDU is satisfed, then the SDU is discarded; otherwise, the step B) is performed continuously by the step C); wherein, the said predetermined condition is that the total retransmission times exceeds a predetermined value, wherein n >/=2, amd less than or equal to the total of the PDU in the RLC layer of the said SDU. Corresponding device and system of the above mentioned method are also provided. Method and device of the invention can ensure that the channel rate doesn't influence the ratio of discarding SDU, and prevents the appearance of the too large delay changing.
Description
The discarding method and its engineering device technique field of service data unit in radio link control affirmation mode
Present invention relates in general to wireless spread-spectrum technology in wireless communication system（RLC improved service data unit in) the relevant technology of agreement, more particularly to a kind of wireless communication system rlc protocol（SDU discarding method).Background technology
Fig. 1 shows WCDMA radio interface protocol architectures.As illustrated, positioned at bottom being physical layer（PHY ) .It is media access control layer respectively on control plane, physical layer（MAC), wireless chain control layer（) and wireless heterogeneous networks (RRC) layer RLC.In user plane, in addition to MAC layer and rlc layer, in addition to PDCP（PDCP) layer and broadcast/group broadcast control（BMC) layer.The MAC layers of channel between physical layer is transmission channel, and the channel between MAC layer and rlc layer is logic channel.To a specific end user device（UE), it is understood that there may be multiple RLC entities, the logic channel different UE corresponds to different RLC entities respectively.
RLC agreements are that user and control data provide segmentation and retransmission service, and each RLC entities are configured to one of Three models by RRC：Transparent mode（TM), Unacknowledged Mode（) and affirmation mode UM（AM ).Wherein TM patterns and UM patterns are mainly used in the more sensitive real time business of time delay ratio, and AM patterns are mainly used in the defeated non real-time packet type business of Bo.For Packet Service, PDCP layers can compress the availability of frequency spectrum that raising is wirelessly transferred by head.According to 3GPP (third generation collaborative projects）TS25.410, TS29.060, the agreement such as TS29.061, PDCP layers of the SDU SDU of rlc layer (when without PDCP layers be) is to be carried on GTP-U (user plane GPRS tunnel protocols）On external packet data net（PDN user data Fen Group).Because PDCP is the IP (Internet protocols to the IP packets from GTP-U）, UDP (use
User data datagram protocol）, TCP (transmission control protocols）It is compressed etc. protocol header, therefore, whether there are PDCP layers, the SDU of rlc layer corresponds to outside PDN user data Fen Group, when outside PDN is IP network, that is, correspond to an IP packet.
In an ip network, the transport layer protocol being most widely used is TCP and UDP, the non real-time application of type of interaction and background type defined in 3GPP, such as WWW (web page browsings）, email, FTP (FTP）Deng, typically all use TCP as transport layer protocol, be as above confused, such business general RLC using AM patterns in radio bearer, in this case, the SDU of rlc layer is one TCP/IP packet of correspondence.
As shown in Fig. 2 being segmented and/or being cascaded to the RLC load cells of regular length from high-rise RLC SDU（PU in) and plus rlc protocol head, wherein, PU length is a semi-static parameter, and it is to be set up in radio bearer or timing determination again.One typical example is, according to TS34.108, and the typical PU length of radio bearer of NRT traffic is 320 bits, if the MTU (MTUs of IP packets）For 576 bytes, then each rlc layer SDU at most may be logically divided into about 15 rlc layer PDU, if the MTU of IP packets is 1500 bytes, each rlc layer SDU at most may be logically divided into about 38 rlc layer PDU.In receiving terminal, after a rlc layer SDU all rlc layer PDU are correctly received, by Bei Chong Group are into complete SDU and are sent to
J layers of T.
The RLC of AM patterns uses arq（ARQ the radio bearer of a low error rate) is provided in link layer, so as to improve the performance of Transmission Control Protocol in the wireless network.ARQ mechanism also increases propagation delay time while low error rate is ensured, although this service quality to the non real-time application such as type of interaction and background type（QoS) influence smaller, but, the excessive time delay produced because repeatedly retransmitting will make the retransmission timer time-out of TCP transmitting terminals, so that Transmission Control Protocol is mistakenly considered network congestion and reduces transmission rate by flow control function, the problem of thus generation Radio Link utilization rate and business throughput rate decline.On the other hand, when enabling order transmitting function, the multiple weight of rlc layer
Pass and also easily cause the Slow of transmitting terminal and receiving terminal to rush area's spilling.On the influence of radio link layer Technique on T CP performances, IETF is may be referred to (because of spy net Gong journey Ren Wu Group）RFC3481 TCP over Second and Third Generation Wireless Networks "; Hari Balakrishnan et al. paper Comparison of Mechanisms for Improving TCP Performance over Wireless Links ", IEEE/ACM Transactions on Networking, Vol.5, No.6
The problem of Wei Minus are small above-mentioned because repeatedly retransmitting and the excessive time delay that produces, and thus generation Radio Link utilization rate and business throughput rate decline, typically using wireless spread-spectrum technology（RLC) service data unit in agreement（SDU transmission of the discarding method) to complete SDU is handled.
In WCDMA wireless communication systems, the RLC of AM patterns can be using one of three kinds of SDU Lost digging soil formulas：The discarding mode based on timer with clear and definite signaling, the SDU Lost digging soils formula after MaxDAT re-transmission, the Bu Lost digging soil formulas Hou MaxDAT re-transmission.In above-mentioned three kinds of modes, mode is not abandoned after being retransmitted through MaxDAT times by the directly reseting procedure of triggering rlc layer, therefore application is smaller after the rlc layer PDU number of retransmissions of an AM pattern reaches MaxDAT.With clear and definite signaling, the discarding mode based on timer is shown as：To each from high-rise SDU, start the timer for monitoring the SDU transmission times, if the SDU is not delivered successfully yet in the given time, transmitting terminal will abandon the SDU, also, if the partial segments of the SDU have been sent, transmitting terminal will use movably receiving window（MRW band control order), makes the reception window of receiving terminal and receives the corresponding renewal of buffering area work.With clear and definite signaling based on timer Lost digging soils formulas due to using fixed maximum delay constraint, although be conducive to improving performance and the QoS such as upper-layer protocol such as TCP throughput, but which easily causes more SDU to be dropped when channel speed changes.SDU Lost digging soils formulas after MaxDAT re-transmission are with having clear and definite signaling based on timer Lost digging soils formulas on the contrary, it ensures constant SDU by cost of Delay Variation using fixed maximum retransmission constraint
Loss ratio.According to newest 3GPP specifications TS25.322V5.4.0 (2003-03), in the SDU discarding modes after being retransmitted through MaxDAT times, once the RLC layer PDU number of retransmissions of an AM pattern reaches MaxDAT, transmitting terminal will abandon all related SDU with partial segments in the PDU, and sending the corresponding all PDU of these SDU being dropped in window, while transmitting terminal, which by MRW band control orders, will make the reception window and reception Slow of receiving terminal rush area, makees corresponding renewal.
It can be seen from foregoing description, in current rlc protocol, the SDU after being retransmitted through MaxDAT times abandons mode is whether to reach predetermined maximum times MaxDAT judgement based on the number of retransmissions to its corresponding PDU to abandon SDU to trigger.As it was previously stated, a SDU has often corresponded to multiple PDU in practical application, and the up to MaxDAT time unsuccessful probability of re-transmission occurs for a PDU, will be far below the probability that the total degree that each corresponding PDU of a SDU retransmits reaches MaxDAT.On the other hand, because RLC receiving terminals need to wait the corresponding all rlc layer PDU of a SDU to be completely successful after reception, could be by recombinating the SDU and submitting to high level, so, technology based on Current protocol specification, SDU after being retransmitted through MaxDAT times, which abandons mode, can not efficiently control SDU propagation delay times, because once the total number of retransmissions of the corresponding PDU of certain SDU is too high, but when each respective number of retransmissions of PDU is less than MaxDAT again, larger time delay will be produced, this may make the retransmission timer time-out of TCP transmitting terminals, so that the control that Transmission Control Protocol is made to make mistake to transmission rate.The content of the invention
In order to solve above mentioned problem of the prior art, the invention provides improved SDU Lost digging soil methods in a kind of wireless communication system rlc protocol, the equipment for realizing the Lost digging soil methods, and use the wireless communication system of the equipment.
There is provided a kind of wireless communication system wireless spread-spectrum technology according to the first aspect of the invention（RLC) service data unit in protocol validation pattern（SDU discarding method), this method comprises the following steps：
A) will the rlc layer SDU from upper-layer protocol be segmented forms corresponding each rlc layer protocol Data Unit of the SDU with cascade after processing（ PDU ) ；
B corresponding each rlc layer PDU of the SDU just) are passed and/or be retransmitted to one by one peer layer through rlc layer transmitting terminal functional entity, and determine whether that satisfaction abandons the predetermined condition of the SDU according to the status information from peer layer；
C) Lost abandons the SDU if the predetermined discarding condition , is met;Otherwise, step B is continuously performed without interruption), until the corresponding all rlc layer PDU of the SDU are successfully transmitted to peer layer receiving terminal；
Wherein, in step B) in the predetermined discarding condition be the corresponding most n rlc layer PDU of the SDU total number of retransmissions more than a predetermined threshold, wherein n>2 but rlc layer PDU less than or equal to SDU sum, and wherein the predetermined threshold is corresponding be confused predetermined discarding condition.
There is provided be used to realize wireless spread-spectrum technology in a kind of wireless communication system according to the second aspect of the invention（RLC) service data unit is abandoned in agreement（SDU the equipment of function), the equipment includes：
Segmentation and cascade processing unit, for the rlc layer SDU from upper-layer protocol to be formed into each corresponding rlc layer protocol Data Unit of the SDU after processing（ PDU )；Dispensing device, for just passing and/or being retransmitted to peer layer one by one through RLC layers of transmitting terminal functional entity by corresponding each rlc layer PDU of the SDU；
Decision maker, for being determined whether to meet the predetermined condition for abandoning the SDU according to the status information from peer layer；
Drop device, for abandoning the SDU meeting the predetermined discarding Tiao Jian Shi Lost, otherwise, by continuous each rlc layer PDU corresponding to the SDU without interruption of the dispensing device just pass and/or retransmit, until the corresponding all rlc layer PDU of the SDU are successfully transmitted to peer layer receiving terminal；
Wherein, the predetermined discarding condition is the corresponding most n rlc layer PDU of the SDU total number of retransmissions more than a predetermined threshold, wherein n>2 but less than or equal to described
SDU rlc layer PDU sum, and wherein the predetermined threshold is corresponding with the predetermined discarding condition.
According to the third aspect of the invention we there is provided a kind of wireless communication system, including core net (CN), wireless access network（), UTRAN end user device（), UE and in wireless spread-spectrum technology（RLC) Dang meets Yu and Dings Lost and abandons service data unit in agreement（The equipment for abandoning the SDU during condition SDU), wherein, it is described to be used to realize that the equipment for abandoning SDU functions is the wireless spread-spectrum technology provided such as above-mentioned second aspect of the present invention（RLC) Shi Xian Lost abandon service data unit in agreement（SDU the equipment of function).
According to a preferred embodiment of the present invention, the number of retransmissions summation from the corresponding all PDU of high-rise SDU is counted in rlc layer transmitting terminal, once total number of retransmissions reaches a predetermined threshold value, transmitting terminal will abandon the SDU and send the corresponding all PDU of the SDU in window, transmitting terminal will use mode same as the prior art simultaneously, by MRW band control orders, the reception window and reception Slow of receiving terminal is rushed area and make corresponding update.
According to a further advantageous embodiment of the invention, when counting corresponding each PDU of SDU number of retransmissions summation, those further comprises in addition to the partial segments comprising the SDU PDU of other SDU partial segments number of retransmissions should also be as statistics including.
The present invention compared with prior art, can both ensure that SDU loss ratios were not influenceed by channel speed, and can prevent excessive Delay Variation to a certain extent again.Brief description of the drawings
By the detailed description carried out with reference to each accompanying drawing to the specific embodiment of the invention, the purpose of the present invention, feature and benefit will become apparent.Wherein：
Fig. 1 is the schematic diagram of radio interface protocol architecture in WCDMA wireless communication systems；
Fig. 2 is RLC wireless protocols affirmation modes（AM patterns）The schematic diagram of middle RLC layers of SDU segmentation and cascade；
Fig. 3 is the flow chart of a specific embodiment of the SDU discarding methods according to the present invention；
Fig. 4 is the detail flowchart of step S40 in flow chart shown in Fig. 3.Embodiment
Referring to each accompanying drawing, to the specific embodiment of the present invention, i.e., the corresponding each RLC layers of PDU of one SDU is through pre-determined number（It is TotalMaxDAT times in the present embodiment）The specific embodiment of SDU discarding methods after re-transmission is described in detail.
Fig. 3 shows the flow chart of a specific embodiment of the SDU discarding methods of the present invention by taking SDU transmission processing as an example.As shown in figure 3, in step S20, the rlc layer SDU from upper-layer protocol initially enters segmentation and the cascade processing unit of AM pattern rlc layer transmitting terminals, and corresponding each rlc layer PDU of the SDU are formed after the cell processing.The counter Counter_ReTrans for counting the corresponding total number of retransmissions of each rlc layer PDU of the SDU is reset in step S30.In step S40, the transmission completed using the SDIJ discarding methods of invention to the SDU is handled.In step S50, the transmission processing of the SDU terminates, and its result is probably that the SDU is dropped, or the SDU is successfully sent to peer layer receiving terminal.
The processing conducted in Fig. 3 step S40 is described in more detail in Fig. 4.As shown in figure 4, in step S100, rlc layer PDU transmitting terminal determines whether that the corresponding rlc layer PDU of the SDU need re-transmission according to the status information from peer layer produced in the transmit process of the SDUIf need not retransmit, then Bu Sudden S160 judge whether that the corresponding all rlc layer PDU of the SDU have been successfully sent to peer layer receiving terminalIf it is judged that being " being ", then terminate the transmission processing of the SDU（Bu Sudden S50), otherwise, continue waiting for transmitting from peer layer to next
Status information judged.If judging there is rlc layer PDU to need re-transmission in step S100, retransmission counter Counter-ReTrans is then updated in step s 110, that is the quantity for the RLC layers PDU that Coimter ReTrans-Counter-ReTrans+k, wherein k retransmit for needs.Then, judge whether counter Counter-ReTrans value exceedes predetermined not value TotalMaxDAT in step S120The predetermined threshold is corresponding to the SDU and abandons the maximum gross biography number of times that the corresponding each rlc layer PDU of the SDU of condition are allowed.If counter Counter-ReTrans value exceedes the predetermined threshold, discard processing then is carried out to the SDU in step S130 and S140, transmitting terminal makes the reception window and reception Slow of peer layer receiving terminal rush area and do corresponding renewal by MRW band control orders.And Fa send Duan Lost abandon the SDU, Bao Kuo Lost and abandon the SDU retained in transmitting terminal backup and sending the corresponding all PDU of the SDU in window.If judging counter Counter-ReTrans value not less than the predetermined threshold TotalMaxDAT in step S120, then retransmission process is carried out in step S170, that is, transmitting terminal in status information to indicating to need the rlc layer PDU retransmitted to retransmit.
Predetermined threshold TotalMaxDAT in the embodiment is predetermined according to the required SDU loss ratios met and the requirement for preventing excessive Delay Variation, therefore easily can be needed to change according to reality.
Although note that for clarity, corresponding RLC layers of PDU retransmission process is drawn in a single square frame by Fig. 4 flow chart（S170 in), but it should be understood by those skilled in the art that, when actually realizing, the corresponding rlc layer PDU of SDU retransmitted to being judged to need according to certain status information re-transmission, and first biography to corresponding other rlc layers PDU of the SDU and/or to retransmit be progress simultaneously.That is, described other rlc layers PDU may only include the RCL layers PDU just passed the need for the SDU, it may be possible to the RCL layer PDU just to pass and judge in previous processing needs re-transmission rlc layer PDU combination.Of course, it is also possible to be that other RLC layers of described PDU has been successfully sent to peer layer receiving terminal, then in this case only to this
It is secondary to judge to need the rlc layer PDU retransmitted to carry out retransmission process.Moreover, in the rlc layer PDU that above-mentioned judgement needs re-transmission, what is had is possibly even to have retransmitted multiple rlc layer PDU.Unless judged to meet the condition for abandoning the SDU, otherwise the transmission of this each rlc layer PDU (including just pass and need the RLC layers PDU retransmitted) corresponding to SDU will be carried out continuously without interruption, even performing step S100, S110, also do not interrupted while S120, S160 and S170.In addition, the status information from peer layer mentioned in Bu Sudden S100 is to be transferred to transmitting terminal from peer layer.And the transmission of status information can be started using various ways, such as when data PDU (AMD PDU) polling ratio is specially for 1 " when；Or used the status PDU transfer function based on timer, and timer Timer_Status-Periodic time-out, etc..The transmission of status information is also possible to be delayed by, such as when having used status PDU prohibiting function.The status information transmission mechanism of which kind of specifically used form, then implementing depending on system.Thus, the counter Counter-ReTrans mentioned in step S110 renewal step-length may be 1 " (whenever it is determined that a rlc layer PDU need retransmit when with regard to transmission state information）, or any integer total rlc layer PDU corresponding less than or equal to the SDU more than 1（The time interval and its rlc layer PDU retransmitted in the time interval the need for determination quantity transmitted depending on status information）.Herein it is to be appreciated that content described in this section of word is known in the communications field, and it is not crucial for the SDU discarding methods for realizing the present invention.
It is emphasized that, in the specific implementation method of SDU Lost digging soil formulas of the invention after TotalMaxDAT re-transmission described above, what the transmission process just for a RLC layers of SDU was described, in implementing, because the RLC transmitting terminals of AM patterns are that the transmission window based on one fixed width is transmitted, influenceed by retransmitting, the SDU that may there is a situation where multiple rlc layers is not successfully sent to the receiving terminal of peer layer, therefore, in implementing, to each in these SDU, each independent retransmission counter Counter-ReTrans should be respectively adopted.
It is readily appreciated that, SDU discarding methods of the invention are that most n rlc layer PDU of the SDU total number of retransmissions is counted, wherein n is more than or equal to 2 and the sum less than or equal to the corresponding rlc layer PDU of the SDU.Whether the value of total number of retransmissions obtained by then judging exceedes some predetermined threshold value, so as to judge whether to meet the condition for abandoning the SDU.In the above preferred embodiment of the invention that reference picture 3 and Fig. 4 are described, n takes the corresponding integer of corresponding with SDU all rlc layer PDU numbers, and this is counted and judged equivalent to total number of retransmissions to the corresponding all rlc layer PDU of SDU.But, selection to the n rlc layer PDU can be diversified, for example, the corresponding at least n rlc layer PDU both can be continuous n PDTJ, can also be the n PDU at interval, number of retransmissions such as n corresponding rlc layer PDU of antithesis numerical digit or odd bits is counted and judged, etc..
According to the description of above-described embodiment; those skilled in the art are easy to be contemplated that the selection mode of the rlc layer PDU that others are counted to its number of retransmissions in addition to above-named example, and these selection modes, which all will be understood that, belongs to protection scope of the present invention.
In addition, in other embodiments of the invention, the above-mentioned SDU Lost digging soil methods based on the corresponding at most n rlc layer PDU total number of retransmissions of the SDU of SDU discarding methods and the present invention of the prior art of the foregoing single rlc layer PDU based on SDU number of retransmissions can also be combined application.As soon as long as the SDU Lost in meeting Ren what Zhong Lost digging soil method abandon condition, abandon corresponding SDIL
According to other specific embodiments of the present invention, when counting each corresponding PDXJ of SDU number of retransmissions, those further comprises with the PDU of other SDU partial segments in addition to the partial segments comprising the SDU, it should also including statistics.Dang determine to Yao Lost to abandon a SDU and send the corresponding rlc layer PDU of the SDU are abandoned in window when, Bu Ying Lost abandon those PDU that other SDU partial segments are further comprises in addition to the partial segments comprising the SDU.
In the various embodiments described above, cascade and segment processing to SDU judge that the Yu for meeting SDU Dings Lost and abandons after condition and abandon the SDU, and judge to be unsatisfactory for the pre- of SDU
The step Sudden such as each rlc layer PDU of the SDU is continuously just passed and/or retransmitted without interruption when abandoning condition surely identical with the step of above-mentioned reference Fig. 3 and Fig. 4 correspondences described, therefore will not be repeated here.
It should be understood that, although the description of the above-mentioned specific embodiment to the present invention realizes that the method for the present invention can be used for realizing SDU discarding in other similar wireless communication systems in the environment of WCDMA (wideband CDMA) wireless communication system.
In addition, SDU discarding methods of the invention described in above-mentioned specific embodiment are realized with corresponding control software, but, the function of wherein each step can also be realized using various hardware units well known in the art, so as to provide the equipment and system of the SDU discarding methods for realizing the present invention.
Although invention has been described for some combined specific embodiments above, it will be understood by those skilled in the art, however, that on the premise of without departing substantially from its general principles and spirit, various modifications can also be made to the present invention.So, protection scope of the present invention is not limited to above-mentioned specific embodiment, but is limited by appended claims.
Claims (1)
- Claim1st, a kind of wireless communication system wireless spread-spectrum technology（RLC) service data unit in protocol validation pattern（SDU discarding method), this method comprises the following steps：A) will the rlc layer SDU from upper-layer protocol be segmented forms corresponding each rlc layer protocol Data Unit of the SDU with cascade after processing（ PDU ) ；B corresponding each rlc layer PDU of the SDU just) are passed and/or be retransmitted to one by one peer layer through rlc layer transmitting terminal functional entity, and determine whether that satisfaction abandons the predetermined condition of the SDU according to the status information from peer layer；C condition) is abandoned if meeting the Yu and Dinging Lost, the SDU is abandoned;Otherwise, step B is continuously performed without interruption), until the corresponding all rlc layer PDU of the SDU are successfully transmitted to peer layer receiving terminal；It is characterized in that：In step B) in described pre- to determine the Lost conditions of abandoning be the corresponding most n rlc layer PDU of the SDU total number of retransmissions more than a predetermined threshold, wherein n>2 but rlc layer PDU less than or equal to SDU sum, and wherein the predetermined threshold is corresponding with the predetermined discarding condition.2nd, in wireless communication system rlc protocol affirmation mode as claimed in claim 1 SDU discarding method, it is characterised in that：The n rlc layer PDU is continuous n PDIL3rd, in wireless communication system rlc protocol affirmation mode as claimed in claim 2 SDU discarding method, it is characterised in that：The continuous n rlc layer PDU is the corresponding all rlc layer PDU of the SDU.4th, SDU Lost digging soil methods in wireless communication system rlc protocol affirmation mode as claimed in claim 1, it is characterised in that：The n rlc layer PDU is discontinuous n PDU.5th, in the wireless communication system rlc protocol affirmation mode as any one of claim 1-4 SDU discarding method, it is characterised in that：Judging described SDU pairs While whether the most n rlc layer PDU answered total number of retransmissions exceedes the predetermined threshold, also each rlc layer PDU of SDU number of retransmissions is judged, when total number of retransmissions of most n rlc layer PDU exceedes the predetermined threshold, or some rlc layer PDU number of retransmissions exceed another predetermined threshold when, then abandon the SDU, wherein, another predetermined threshold is the predetermined discarding condition according to corresponding to the number of retransmissions of a rlc layer PDU with the SDU to determine.6th, in the wireless communication system rlc protocol affirmation mode as any one of claim 1-5 SDU discarding method, it is characterised in that：Also counted for the rlc layer PDU of the partial segments containing other SDUs different from described SDU number of retransmissions.7th, in the wireless communication system rlc protocol affirmation mode as any one of claim 1-5 SDU discarding method, it is characterised in that：When judging to need to abandon the SDU, all rlc layer PDU of the corresponding only partial segments comprising the SDIJ of the SDU are abandoned in transmission window, without abandoning those PDIL that other SDU partial segments are further comprises in addition to the partial segments comprising the SDU8th, it is used to realize wireless spread-spectrum technology in a kind of wireless communication system（RLC) service data unit is abandoned in agreement（SDU the equipment of function), the equipment includes：Segmentation and cascade processing unit, for the rlc layer SDU from upper-layer protocol to be formed into each corresponding rlc layer protocol Data Unit of the SDU after processing（ PDU )；Dispensing device, for just passing and/or being retransmitted to peer layer one by one through RLC layers of transmitting terminal functional entity by corresponding each rlc layer PDU of the SDU；Decision maker, for being determined whether to meet the predetermined condition for abandoning the SDU according to the status information from peer layer；Lost abandons device, for abandoning Tiao Jian Shi Lost and abandoning the SDU meeting the Yu and Ding Lost, otherwise, by continuous each rlc layer PDU corresponding to the SDU without interruption of the dispensing device just pass and/or retransmit, until the corresponding all rlc layer PDU of the SDU are successfully transmitted to peer layer receiving terminal； It is characterized in that：It is described that pre- to determine the Lost conditions of abandoning be the corresponding most n rlc layer PDU of the SDU total number of retransmissions more than a predetermined threshold, wherein n>2 but rlc layer PDU less than or equal to SDU sum, and wherein the predetermined threshold is corresponding be confused predetermined discarding condition.9th, as being used to realize wireless spread-spectrum technology in wireless communication system that claim 8 is confused（RLC) service data unit is abandoned in agreement（SDU the equipment of function), it is characterised in that：The n rlc layer PDU is continuous n PDU.10th, it is used to realize wireless spread-spectrum technology in wireless communication system as claimed in claim 9（RLC) service data unit is abandoned in agreement（SDU the equipment of function), it is characterised in that：The continuous n rlc layer PDU is the corresponding all rlc layer PDIL of the SDU11st, it is used to realize wireless spread-spectrum technology in wireless communication system as claimed in claim 8（RLC) service data unit is abandoned in agreement（SDU the equipment of function), it is characterised in that：The n rlc layer PDU is discontinuous n PDIL12nd, it is used to realize wireless spread-spectrum technology in the wireless communication system as any one of claim 8-11（RLC the equipment that the apple of service data one fills the function of (SDU)) is abandoned in agreement, it is characterised in that：While whether the total number of retransmissions for judging the corresponding most n RLC layers of PDU of the SDU exceedes the predetermined threshold, also each rlc layer PDU of SDU number of retransmissions is judged, when total number of retransmissions of most n RLC layers of PDU exceedes the predetermined threshold, or some RLC layers of PDU number of retransmissions exceed another predetermined threshold when, then abandon the SDU, wherein, another predetermined threshold is that Yu according to corresponding to the number of retransmissions of a rlc layer PDU with the SDU Dings Lost and abandons condition to determine.13rd, it is used to realize wireless spread-spectrum technology in the wireless communication system as any one of claim 8-11（RLC) service data unit is abandoned in agreement（SDU the equipment of function), it is characterised in that：Also counted for the rlc layer PDU of the partial segments containing other SDUs different from described SDU number of retransmissions. 14th, it is used to realize wireless spread-spectrum technology in the wireless communication system as any one of claim 8-11（RLC) service data unit is abandoned in agreement（SDU the equipment of function), it is characterised in that：When judging to need to abandon the SDU, all rlc layer PDU of the corresponding only partial segments comprising the SDU of the SDU are abandoned in transmission window, without abandoning those PDU that other SDU partial segments are further comprises in addition to the partial segments comprising the SDU.15th, a kind of wireless communication system, including core net（), CN wireless access network (UTRAN), end user device（), UE and in wireless spread-spectrum technology (RLC) agreement when meeting predetermined discarding service data unit（The SDU is abandoned during condition SDU), it is characterised in that：The equipment that SDU functions are abandoned for Shi Xian Lost is wireless spread-spectrum technology as claimed in claim 8（RLC) realized in agreement and abandon service data unit（SDU the equipment of function).16th, wireless communication system as claimed in claim 15, it is characterised in that：The n rlc layer PDU is continuous n PDU.17th, wireless communication system as claimed in claim 16, it is characterised in that：It is described18th, wireless communication system as claimed in claim 15, it is characterised in that：Be confused n rlc layer PDU is discontinuous n PDU.19th, the wireless communication system as any one of claim 15-18, it is characterised in that：While whether the total number of retransmissions for judging the corresponding most n rlc layer PDU of the SDU exceedes the predetermined threshold, also each rlc layer of SDU PDU number of retransmissions is judged, when total number of retransmissions of most n rlc layer PDU exceedes the predetermined threshold, or some rlc layer PDU number of retransmissions exceed another predetermined threshold when, then abandon the SDU, wherein, another predetermined threshold is that Yu according to corresponding to the number of retransmissions of a rlc layer PDU with the SDU Dings Lost and abandons condition to determine.20th, the wireless communication system as any one of claim 15-18, it is special Levy and be：Also counted for the rlc layer PDU of the partial segments containing different other SDU of the SDU from being confused number of retransmissions.21st, the wireless communication system as any one of claim 15-18, it is characterised in that：When judging to need to abandon the SDU, all rlc layer PDU, the PDIL without abandoning those partial segments that other SDU are further comprises in addition to the partial segments comprising the SDU of the corresponding only partial segments comprising the SDU of the SDU are abandoned in transmission window
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2003/000471 WO2004112305A1 (en) | 2003-06-18 | 2003-06-18 | Method and apparatus for discarding the service data units in the acknowledgement mode of the rlc in the wireless communications system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1771685A true CN1771685A (en) | 2006-05-10 |
| CN100379192C CN100379192C (en) | 2008-04-02 |
Family
ID=33546167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038264757A Expired - Fee Related CN100379192C (en) | 2003-06-18 | 2003-06-18 | Method for discarding the service data unit in the acknowledgement mode of the RLC protocol and its device |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN100379192C (en) |
| AU (1) | AU2003248218A1 (en) |
| WO (1) | WO2004112305A1 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009086679A1 (en) * | 2007-12-29 | 2009-07-16 | Zte Corporation | Method for reset control of radio link control entity |
| CN101965705A (en) * | 2007-10-01 | 2011-02-02 | 交互数字专利控股公司 | Method and apparatus for pcdp discard |
| CN102469511A (en) * | 2010-11-15 | 2012-05-23 | 中兴通讯股份有限公司 | Packet data convergence protocol layer handling data method and system |
| CN103763314A (en) * | 2014-01-06 | 2014-04-30 | 南京信息工程大学 | Method and device for processing user layer data in practically deployed tumble detecting system |
| CN107070607A (en) * | 2008-01-04 | 2017-08-18 | 交互数字专利控股公司 | It is a kind of by the WTRU methods implemented and the WTRU |
| WO2019024535A1 (en) * | 2017-07-31 | 2019-02-07 | Oppo广东移动通信有限公司 | Data processing method and product related thereto |
| CN110011925A (en) * | 2018-01-04 | 2019-07-12 | 维沃移动通信有限公司 | A kind of processing method and communication equipment of SDU |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1330155C (en) * | 2005-08-24 | 2007-08-01 | 华为技术有限公司 | Data processing method of protocol data unit in radio chain circuit control disordcred sequence transmission function |
| CN100407611C (en) * | 2006-02-21 | 2008-07-30 | 华为技术有限公司 | Method for controlling pocket data transmission rate in mobile communication network and system thereof |
| WO2009145420A1 (en) * | 2008-03-31 | 2009-12-03 | Samsung Electronics Co., Ltd. | Method and system for discarding data units in a mobile communication system |
| CN102098150B (en) * | 2009-12-10 | 2014-10-22 | 中兴通讯股份有限公司 | Reception acknowledgement processing method and base station |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6424625B1 (en) * | 1998-10-28 | 2002-07-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for discarding packets in a data network having automatic repeat request |
| US6519223B1 (en) * | 1999-04-06 | 2003-02-11 | Telefonaktiebolaget L M Ericsson (Publ) | System and method for implementing a semi reliable retransmission protocol |
| CN1154305C (en) * | 2001-09-25 | 2004-06-16 | 华为技术有限公司 | Method and device for promoting quick sliding of radio link control layer data transmission window |
-
2003
- 2003-06-18 AU AU2003248218A patent/AU2003248218A1/en not_active Abandoned
- 2003-06-18 CN CNB038264757A patent/CN100379192C/en not_active Expired - Fee Related
- 2003-06-18 WO PCT/CN2003/000471 patent/WO2004112305A1/en active Application Filing
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9641655B2 (en) | 2007-10-01 | 2017-05-02 | Interdigital Patent Holdings, Inc. | Method and apparatus for PCDP discard |
| CN101965705A (en) * | 2007-10-01 | 2011-02-02 | 交互数字专利控股公司 | Method and apparatus for pcdp discard |
| US10630819B2 (en) | 2007-10-01 | 2020-04-21 | Interdigital Patent Holdings, Inc. | Method and apparatus for PCDP discard |
| CN104821865B (en) * | 2007-10-01 | 2019-03-29 | 交互数字专利控股公司 | The method and apparatus abandoned for PDCP |
| CN101965705B (en) * | 2007-10-01 | 2015-05-06 | 交互数字专利控股公司 | Method and apparatus for pcdp discard |
| CN104821865A (en) * | 2007-10-01 | 2015-08-05 | 交互数字专利控股公司 | Method and apparatus for PCDP discard |
| WO2009086679A1 (en) * | 2007-12-29 | 2009-07-16 | Zte Corporation | Method for reset control of radio link control entity |
| CN107070607A (en) * | 2008-01-04 | 2017-08-18 | 交互数字专利控股公司 | It is a kind of by the WTRU methods implemented and the WTRU |
| WO2012065473A1 (en) * | 2010-11-15 | 2012-05-24 | 中兴通讯股份有限公司 | Method and system for packet data convergence protocol layer to process data |
| CN102469511A (en) * | 2010-11-15 | 2012-05-23 | 中兴通讯股份有限公司 | Packet data convergence protocol layer handling data method and system |
| CN103763314B (en) * | 2014-01-06 | 2017-01-11 | 南京信息工程大学 | Method and device for processing user layer data in practically deployed tumble detecting system |
| CN103763314A (en) * | 2014-01-06 | 2014-04-30 | 南京信息工程大学 | Method and device for processing user layer data in practically deployed tumble detecting system |
| WO2019024535A1 (en) * | 2017-07-31 | 2019-02-07 | Oppo广东移动通信有限公司 | Data processing method and product related thereto |
| US10944681B2 (en) | 2017-07-31 | 2021-03-09 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Methods and devices for data processing |
| CN110011925A (en) * | 2018-01-04 | 2019-07-12 | 维沃移动通信有限公司 | A kind of processing method and communication equipment of SDU |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100379192C (en) | 2008-04-02 |
| WO2004112305A1 (en) | 2004-12-23 |
| AU2003248218A1 (en) | 2005-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101779408B (en) | Method for sending status information in mobile telecommunications system and receiver of mobile telecommunications | |
| CN100574174C (en) | The control method that radio link control layer buffer area overflows | |
| EP1766834B1 (en) | Radio link protocols for a wireless communication system | |
| AU2006229505B2 (en) | Method and apparatus of controlling transmission of data block | |
| US8031610B2 (en) | Apparatus and method for moving a receive window in a radio access network | |
| KR101563392B1 (en) | Method and apparatus for triggering radio link control packet discard and radio link control re-establishment | |
| JP4607339B2 (en) | Flexible radio link control protocol | |
| KR100787294B1 (en) | Tcp progress apparatus in mobile communication base station | |
| Lefevre et al. | Understanding TCP's behavior over wireless links | |
| JP2010511318A (en) | Method and apparatus for transmitting data in radio link control layer in mobile communication system | |
| CN101868932A (en) | A method of performing polling procedure in a wireless communication system | |
| Wong et al. | Improving end-to-end performance of TCP using link-layer retransmissions over mobile internetworks | |
| JP2002135357A (en) | Control method for data flow in communication system | |
| CN1771685A (en) | Method for discarding the service data unit in the acknowledgement mode of the RLC protocol and its device | |
| Vangala et al. | The TCP SACK-aware snoop protocol for TCP over wireless networks | |
| Bestak et al. | RLC buffer occupancy when using a TCP connection over UMTS | |
| Ding et al. | Delay performance of the new explicit loss notification TCP technique for wireless networks | |
| Lin et al. | TCP performance analysis of CDMA systems with RLP and MAC layer retransmissions | |
| Bai et al. | TCP/RLP coordination and interprotocol signaling for wireless Internet | |
| Filali | Link-layer fragmentation and retransmission impact on TCP Performance in 802.11-based networks | |
| Anjum et al. | Performance of TCP over lossy upstream and downstream links with link-level retransmissions | |
| Koga et al. | Out-of-sequence packet arrivals due to layer 2 ARQ and its impact on TCP performance in W-CDMA networks | |
| Bestak et al. | A TCP connection over uplink UMTS radio access bearer in RLC acknowledged mode | |
| Shagdar et al. | Improving ECN-based TCP performance over wireless networks using a homogeneous implementation of EWLN | |
| Bestak et al. | Interactions between the TCP and RLC Protocols in UMTS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080402 Termination date: 20110618 |