CN101267440B - No damage relocation method and system - Google Patents
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Abstract
The invention relates to a lossless relocation method, comprising the following steps: step 102, a sending terminal notifies a receiving terminal of the expected serial number of a next protocol data unit expected to be received; step 104, the receiving terminal judges whether the expected serial number is valid or not, if yes, protocol data unit records in a serial number window, which have numbers smaller than the expected serial number, are released, and the residual protocol data unit records in the serial number window are set to be in unconfirmed state, or else, protocol data unit records in the serial number window are modified to be in unconfirmed state; and step 106, the protocol data units in unconfirmed state in the serial number window are sent. Furthermore, the invention discloses a lossless relocation system. According to the invention, easy loss and inability to retransmission of data packets in related technologies are avoided, and the problem that the SN window has protocol data unit records which have larger numbers than ExpectSeqNum but are in confirmed state, thus ensuring the reliability of lossless relocation.
Description
Technical field
The present invention relates to the communications field, and especially, relate to a kind of no damage relocation method and system.
Background technology
In 3G (Third Generation) Moblie standard (TD-SCDMA) standard that China proposes; PDCP (PDCP) layer is applied in data (PS) territory; The RAB in each PS territory (RAB) all is associated with unlimited carry (RB); Each RB all with a PDCP entity associated, and each PDCP entity all with a wireless chain control layer (RLC) entity associated.
Wherein, each PDCP entity can have a plurality of different compression protocol types.And if defined a plurality of PDCP entities, then each entity can have a plurality of identical or different compression protocol type.In subscriber equipment (UE can also be called user terminal) side, PDCP provides service to Non-Access Stratum (NAS), and in radio network controller (RNC), realizes the signal relay function.PDCP is called radio bearer to the service that high level provides.The function that the PDCP layer is mainly accomplished comprises: (1) send and receiving entity in accomplish a compression and decompression of IP traffic (for example, for TCP/IP and the RTP/UDP/IP of IPv4 and IPv6 signal heads) respectively; (2) transmission of user data; (3), accomplish the maintenance of PDCP sequence number for the radio bearer that is configured to support harmless SRNS Serving Radio Network Subsystem (SRNS) reorientation.
In cell mobile communication systems; The limited coverage area of single base station, so, when user terminal gets into the another one sub-district from sub-district in the process of conversation; In order to guarantee communication continuity; System needs this user terminal and getting in touch of original sub-district foundation are transferred on the new sub-district, that is, carry out the sub-district and switch.User terminal not only can switch between the different districts under the same base station controller, but also can on different system, different base station controller, switch.
When user terminal is switching, change base station controller if desired, just need carry out the reorientation of UE and operate.In the TD-SCDMA system, switch in the process of Target RNC at source radio network controller (RNC), also the SRNS reorientation can take place.The process of its reorientation is following:
At first; The radio resource control layer of source RNC (RRC) sends reorientation message to the RLC of source RNC; The RLC of indication source RNC is set to stop transmit status; The RRC of source RNC sends reorientation message to the PDCP of source RNC, and PDCP will be with sending but do not obtained packet and cached data packet that RLC confirms and transfer to together on the purpose RNC;
Then; When UE receives the physical channel reconfiguration message of source RNC transmission; Detect and whether carry down-going synchronous counter (DL_CounterSynchronisation Info) in this reconfiguration message or the interim indications of Radio Access Network (UTRAN) side wireless network (new U-RNT) is arranged in the RB reconfiguration message; If carry, UE just thinks that being redirected trigger condition sets up so;
Afterwards; The RLC of UE side is set to stop transmit status, and the PDCP of UE side receives the next sequence number that up expectation receives, the service data unit (SDU) that beginning buffer memory upper strata issues; And no longer handle and be handed down to RLC, RRC indication RLC rebulids SRB2 and indicates physical layer to carry out and switches;
At last, after Target RNC detected UE, UE sent physical channel to Target RNC and reshuffles completion message, and UE side RRC sends RB2 for the PDCP of this side and rebuilds completion message, makes UE side PDCP begin to send business datum to RLC, and beginning is communicated by letter with Target RNC.According to 3GPP TS 25.323 agreements, the PDCP entity of the harmless SRNS reorientation of every support all need be done sequence number and safeguard, and will send to RLC and not obtain the data cell that RLC confirms transmission and be recorded in the window of sequence numbers (SN window).
Yet the inventor finds that there is following problem in above-mentioned processing mode:
(1) for the RB that supports harmless SRNS reorientation, RLC is configured to confirm (AM) pattern that upstream sequence is submitted; Just the RLC of UE side delivers to a data unit RLC of opposite end; Confirmed to send to this data cell of UE side PDCP report then, submitted, possibly not receive the data of front but the RLC of opposite end is an order; This moment just can be with the PDCP that gives network terminal on this data cell; If this moment, the switching of source RNC to Target RNC took place, the reconstruction of UE end RLC transmitter side can empty and send the buffer memory of the packet of (regardless of having confirmed or unconfirmed), causes losing of unacknowledged data packet;
(2) for unacknowledged protocol Data Unit, PDCP leaves record, but has confirmed because order is submitted and by the packet that the opposite end abandons, with record deletion, can not retransmit among the PDCP;
(3) the sequence number note that the up expectation that receives for UE side PDCP receives is made ExpectSeqNum, and in SN window, possibly exist than the big PDU record of " affirmation " of still receiving of ExpectSeqNum numbering.
At present, in the prior art, the technical scheme that can address the above problem is not proposed as yet.
Summary of the invention
Consider the problems referred to above and make the present invention; For this reason; Main purpose of the present invention is to provide a kind of no damage relocation method and system, with solve unacknowledged data packet in the correlation technique lose, can not retransmit and SN window in exist bigger but but receive the problem that the protocol Data Unit of " affirmations " writes down than the ExpectSeqNum numbering.
According to one embodiment of present invention, a kind of no damage relocation method is provided, has been applied to the packet data convergence protocol of TDS-CDMA system.
This method comprises: transmitting terminal notifies the expectation sequence number of the next protocol Data Unit that its expectation receives to receiving terminal; Receiving terminal judges whether the expectation sequence number is effective; Be judged as under the situation that is; Discharge in the window of sequence numbers numbering less than the record of the protocol Data Unit of expectation sequence number, and be state unconfirmed the recording setting of remaining protocol Data Unit in the window of sequence numbers; Otherwise with the record modification of the protocol Data Unit in the window of sequence numbers is state unconfirmed; And the protocol Data Unit that is in state unconfirmed in the window that transmits Sequence Number.Wherein, Judging whether the expectation sequence number is effectively handled is specially: the expectation sequence number less than window of sequence numbers in the protocol Data Unit that has sent unconfirmed under the situation of the numbering of the minimum protocol Data Unit of numbering, or the expectation sequence number greater than window of sequence numbers in the protocol Data Unit that has sent unconfirmed under the situation of the numbering of the maximum protocol Data Unit of numbering, judge that the expectation sequence number is invalid; Otherwise judge that the expectation sequence number is effective.
Wherein, before transmitting terminal will expect that sequence number is notified to receiving terminal, further comprise: transmitting terminal is confirmed the expectation sequence number of the next protocol Data Unit of this protocol Data Unit according to the sequence number of the protocol Data Unit that receives.
Particularly; Judge that at receiving terminal the expectation sequence number is under the invalid situation; In the recording setting with remaining protocol Data Unit is state unconfirmed; Further comprise: the minimum protocol Data Unit of numbering in the remaining protocol Data Unit is encapsulated as the sequence number protocol Data Unit, and carries out synchronously in this locality; Sequence number protocol Data Unit after sending synchronously.
Wherein, being recorded as of protocol Data Unit is sent to the local wireless chain control layer of receiving terminal and the wireless chain control layer record that has been transferred to the protocol Data Unit of transmitting terminal unconfirmed of receiving terminal in the window of sequence numbers.
In addition, transmitting terminal is a subscriber equipment, and receiving terminal is a network equipment; Perhaps transmitting terminal is a network equipment, and receiving terminal is a subscriber equipment.
According to another embodiment of the present invention, a kind of harmless reorientation system is provided, has been applied to the packet data convergence protocol of TDS-CDMA system.
Said system comprises: transmitting terminal is used for its expectation sequence number of expecting the next protocol Data Unit of reception is notified to receiving terminal; Receiving terminal; Be used for judging whether the expectation sequence number is effective; And be judged as under the situation that is, discharge in the window of sequence numbers numbering less than the record of the protocol Data Unit of expectation sequence number, and be state unconfirmed the recording setting of remaining protocol Data Unit in the window of sequence numbers; Otherwise with the record modification of the protocol Data Unit in the window of sequence numbers is state unconfirmed; And the protocol Data Unit that is in state unconfirmed in the window that transmits Sequence Number.
Wherein, Receiving terminal is judged whether the expectation sequence number is effectively handled and is specially: the expectation sequence number less than window of sequence numbers in the protocol Data Unit that has sent unconfirmed under the situation of the numbering of the minimum protocol Data Unit of numbering, or the expectation sequence number greater than window of sequence numbers in the protocol Data Unit that has sent unconfirmed under the situation of the numbering of the maximum protocol Data Unit of numbering, judge that the expectation sequence number is invalid; Otherwise judge that the expectation sequence number is effective.
In addition; Judge that at receiving terminal the expectation sequence number is under the invalid situation; In the recording setting with remaining protocol Data Unit is state unconfirmed; Further comprise: the minimum protocol Data Unit of numbering in the remaining protocol Data Unit is encapsulated as the sequence number protocol Data Unit, and carries out synchronously in this locality; Sequence number protocol Data Unit after sending synchronously.
In addition, transmitting terminal is a subscriber equipment, and receiving terminal is a network equipment; Perhaps transmitting terminal is a network equipment, and receiving terminal is a subscriber equipment.
Through technique scheme of the present invention; Can effectively solve packet in the correlation technique lose easily with can't retransmit and SN window in exist greatlyyer but but receive the problem that the protocol Data Unit of " affirmations " writes down than the ExpectSeqNum numbering, guaranteed the reliability of harmless reorientation.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the no damage relocation method of the inventive method embodiment;
Fig. 2 is the flow chart according to the detailed process of the no damage relocation method of the inventive method embodiment; And
Fig. 3 is the block diagram of the harmless reorientation system of system according to the invention embodiment.
Embodiment
Usually; When carrying out the mobile communcations system design; When the support that realizes harmless SRNS reorientation; PDCP should the PDU that preservation possibly lost in window of sequence numbers (SN window) as much as possible record, guarantee the PDCP layer can when harmless SRNS reorientation takes place the packet of retransmission of lost as much as possible.
Based on this way; Below will be at first in the description protocol to the basic demand of SN window: through supporting the PDCP entity of harmless SRNS reorientation to each; PDCP need carry out sequence number to the PDU that receives and send and safeguard and need safeguard that SN window shows, and but the record of depositing in the table is to send to RLC the PDU record of not confirmed to be transferred to the opposite end by RLC.The size of SN window is specified when disposing the PDCP entity by the upper strata, can be 255 or 65535.
Based on above description, describe embodiments of the invention below with reference to accompanying drawings in detail.
Method embodiment
In the present embodiment, a kind of no damage relocation method is provided, has been applied to the packet data convergence protocol of synchronous horse division multiple access system of time-division.
As shown in Figure 1, comprise according to the no damage relocation method of present embodiment: step S102, transmitting terminal notifies expectation sequence number of the next PDU that its expectation receives to receiving terminal; Step S104, receiving terminal judge whether the expectation sequence number is effective, is being judged as under the situation that is, discharge in the window of sequence numbers numbering less than the record of the PDU of expectation sequence number, and are state unconfirmed with the recording setting of remaining PDU in the window of sequence numbers; Otherwise with the record modification of the PDU in the window of sequence numbers is state unconfirmed; Step S106, the PDU that is in state unconfirmed in the window that transmits Sequence Number.
Wherein, before transmitting terminal will expect that sequence number is notified to receiving terminal, further comprise: transmitting terminal is confirmed the expectation sequence number of the next PDU of this PDU according to the sequence number of the PDU that receives.
Wherein, Judging whether the expectation sequence number is effectively handled is specially: the expectation sequence number less than window of sequence numbers among the PDU that has sent unconfirmed under the situation of the numbering of the minimum PDU of numbering, or the expectation sequence number greater than window of sequence numbers among the PDU that has sent unconfirmed under the situation of the numbering of the maximum PDU of numbering, judge that the expectation sequence number is invalid; Otherwise judge that the expectation sequence number is effective.
In addition, judging that at receiving terminal the expectation sequence number is under the invalid situation, is state unconfirmed in the recording setting with remaining PDU, further comprises: the minimum PDU of numbering among the remaining PDU is encapsulated as sequence number PDU, and carries out synchronously in this locality; Sequence number PDU after sending synchronously.
Wherein, transmitting terminal is a subscriber equipment, and receiving terminal is a network equipment; Perhaps transmitting terminal is a network equipment, and receiving terminal is a subscriber equipment.
To combine accompanying drawing below, be example as transmitting terminal, network equipment as receiving terminal with subscriber equipment, and technique scheme is elaborated.Fig. 2 is the flow chart according to the detailed process of the no damage relocation method of the embodiment of the invention.As shown in Figure 2, it specifically can may further comprise the steps:
Step 1; The sequence number of the next PDU that the up expectation that the reception network side sends over receives; Wherein, the PDCP that sequence number mainly is meant the UE side receives the numbering of the next up PDU that the PDCP layer expectation of network side receive through RRC, and this numbering is network side calculates the next PDU of this side expectation reception according to PDU that has received and network equipment count pick up device numbering (ExpectSeqNum; That is above-mentioned expectation sequence number);
Step 2; UE side PDCP judges whether this ExpectSeqNum is effective; According to agreement; If it is little or bigger than the maximum PDU record that has sent unconfirmed among the SN window that ExpectSeqNum has sent the PDU record than minimum unconfirmed among the SN window, think that then the next up sequence number of network expectation is unavailable;
If ExpectSeqNum can use, then execution in step three, otherwise execution in step four and step 5;
Step 3; The PDU record littler among the deletion SN window than this numbering; And the Acknowledge list item of PDU record remaining among the SNwindow all is revised as state unconfirmed, what do like this is because the ExpectSeqNum that the opposite end expectation receives is smaller, and RLC can empty buffer memory when rebuilding; Bigger than ExpectSeqNum so in other words and PDU that UE side PDCP has sent has lost, and execution in step six;
Step 4 all is revised as state unconfirmed with the Acknowledge list item of all PDU records in SN window, encapsulates then that first unacknowledged PDU is SN PDU among the SN window, sends to the RLC of lower floor;
Step 5, after receiving that the RLC report confirms that this SN PDU has sent to opposite end RLC, synchronizing process finishes, and execution in step six;
Step 6; PDU unconfirmed among the SN window is all retransmitted once; Because though these PDU were sent by the PDCP of UE side; But in the process of harmless reorientation, in fact abandoned for various reasons, if do not retransmit then can not get forever confirming the resource that to waste SN window by Radio Link.
System embodiment
Fig. 3 is the block diagram according to the harmless reorientation system of the embodiment of the invention.
As shown in Figure 3, present embodiment provides a kind of harmless reorientation system, is applied to the packet data convergence protocol of synchronous horse division multiple access system of time-division.
Said system comprises: transmitting terminal 302 is used for its expectation sequence number of expecting the next PDU of reception is notified to receiving terminal; Receiving terminal 304 is used for judging whether the expectation sequence number is effective, and is being judged as under the situation that is, discharges in the window of sequence numbers numbering less than the record of the PDU of expectation sequence number, and is state unconfirmed with the recording setting of remaining PDU in the window of sequence numbers; Otherwise with the record modification of the PDU in the window of sequence numbers is state unconfirmed; And the PDU that is in state unconfirmed in the window that transmits Sequence Number.
Wherein, Receiving terminal 304 is judged whether the expectation sequence numbers are effectively handled and is specially: the expectation sequence number less than window of sequence numbers among the PDU that has sent unconfirmed under the situation of the numbering of the minimum PDU of numbering, or the expectation sequence number greater than window of sequence numbers among the PDU that has sent unconfirmed under the situation of the numbering of the maximum PDU of numbering, judge that the expectation sequence number is invalid; Otherwise judge that the expectation sequence number is effective.
In addition, judging that at receiving terminal 304 the expectation sequence numbers are under the invalid situation, is state unconfirmed in the recording setting with remaining PDU, further comprises: the minimum PDU of numbering among the remaining PDU is encapsulated as sequence number PDU, and carries out synchronously in this locality; Sequence number PDU after sending synchronously.
Wherein, transmitting terminal 302 is a subscriber equipment, and receiving terminal is a network equipment; Perhaps transmitting terminal is a network equipment, and receiving terminal is a subscriber equipment.
In sum; The present invention has fully taken into account the situation of actual realization; In SN window table, increase " Acknowledge " list item, remedied the deficiency of having only two list items in the correlation technique, solved the problem that packet is lost easily and can't be retransmitted in the correlation technique; Secondly, the present invention has changed the operation about being write down by " affirmation " among the SN window, rather than the simple record that is identified of deleting; In addition, the present invention receives the PDU record of " affirmation " in strict accordance with the spirit of agreement greatly and for the sequence number that the up expectation that receives than UE side PDCP among the SN window receives, and has carried out optimization process.Guaranteed the reliability of harmless reorientation among the PDCP SN window.By means of technical scheme of the present invention; Can effectively solve packet in the correlation technique lose easily with can't retransmit and SNwindow in exist greatlyyer but but receive the problem that the protocol Data Unit of " affirmations " writes down than the ExpectSeqNum numbering, guaranteed the reliability of harmless reorientation.
Obviously, it is apparent to those skilled in the art that above-mentioned each modular unit of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. no damage relocation method is applied to the packet data convergence protocol of TDS-CDMA system, it is characterized in that said method comprises:
Transmitting terminal notifies the expectation sequence number of the next protocol Data Unit that its expectation receives to receiving terminal;
Said receiving terminal judges whether said expectation sequence number is effective; Be judged as under the situation that is; Discharge in the window of sequence numbers numbering less than the record of the protocol Data Unit of said expectation sequence number, and be state unconfirmed the recording setting of remaining protocol Data Unit in the said window of sequence numbers; Otherwise with the record modification of the protocol Data Unit in the said window of sequence numbers is state unconfirmed; And
Send the protocol Data Unit that is in state unconfirmed in the said window of sequence numbers, wherein,
Judging whether said expectation sequence number is effectively handled is specially:
Said expectation sequence number less than said window of sequence numbers in the protocol Data Unit that has sent unconfirmed under the situation of the numbering of the minimum protocol Data Unit of numbering, or said expectation sequence number greater than said window of sequence numbers in the protocol Data Unit that has sent unconfirmed under the situation of the numbering of the maximum protocol Data Unit of numbering, judge that said expectation sequence number is invalid; Otherwise judge that said expectation sequence number is effective.
2. method according to claim 1 is characterized in that, before said transmitting terminal is notified said expectation sequence number to said receiving terminal, further comprises:
Said transmitting terminal is confirmed the expectation sequence number of the next protocol Data Unit of this protocol Data Unit according to the sequence number of the protocol Data Unit that receives.
3. method according to claim 1 is characterized in that, judges that at said receiving terminal said expectation sequence number is under the invalid situation, is state unconfirmed in the recording setting with said remaining protocol Data Unit, further comprises:
The minimum protocol Data Unit of numbering in the said remaining protocol Data Unit is encapsulated as the sequence number protocol Data Unit, and carries out synchronously in this locality;
Said sequence number protocol Data Unit after sending synchronously.
4. according to each described method in the claim 1 to 3; It is characterized in that being recorded as of protocol Data Unit is sent to the local wireless chain control layer of said receiving terminal and the wireless chain control layer record that has been transferred to the protocol Data Unit of said transmitting terminal unconfirmed of said receiving terminal in the said window of sequence numbers.
5. according to each described method in the claim 1 to 3, it is characterized in that,
Said transmitting terminal is a subscriber equipment, and said receiving terminal is a network equipment; Perhaps
Said transmitting terminal is a network equipment, and said receiving terminal is a subscriber equipment.
6. harmless reorientation system is applied to the packet data convergence protocol of TDS-CDMA system, it is characterized in that said system comprises:
Transmitting terminal is used for its expectation sequence number of expecting the next protocol Data Unit of reception is notified to receiving terminal;
Said receiving terminal; Be used to judge whether said expectation sequence number is effective; And be judged as under the situation that is; Discharge in the window of sequence numbers numbering less than the record of the protocol Data Unit of said expectation sequence number, and be state unconfirmed the recording setting of remaining protocol Data Unit in the said window of sequence numbers; Otherwise with the record modification of the protocol Data Unit in the said window of sequence numbers is state unconfirmed; And send the protocol Data Unit that is in state unconfirmed in the said window of sequence numbers;
Wherein, said receiving terminal is judged whether said expectation sequence number is effectively handled and is specially:
Said expectation sequence number less than said window of sequence numbers in the protocol Data Unit that has sent unconfirmed under the situation of the numbering of the minimum protocol Data Unit of numbering, or said expectation sequence number greater than said window of sequence numbers in the protocol Data Unit that has sent unconfirmed under the situation of the numbering of the maximum protocol Data Unit of numbering, judge that said expectation sequence number is invalid; Otherwise judge that said expectation sequence number is effective.
7. system according to claim 6 is characterized in that, judges that at said receiving terminal said expectation sequence number is under the invalid situation, is state unconfirmed in the recording setting with said remaining protocol Data Unit, further comprises:
The minimum protocol Data Unit of numbering in the said remaining protocol Data Unit is encapsulated as the sequence number protocol Data Unit, and carries out synchronously in this locality;
Said sequence number protocol Data Unit after sending synchronously.
8. according to each described system in the claim 6 to 7, it is characterized in that,
Said transmitting terminal is a subscriber equipment, and said receiving terminal is a network equipment; Perhaps
Said transmitting terminal is a network equipment, and said receiving terminal is a subscriber equipment.
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| CN200810096919XA CN101267440B (en) | 2008-05-07 | 2008-05-07 | No damage relocation method and system |
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| CN101998505B (en) * | 2009-08-12 | 2013-06-12 | 中兴通讯股份有限公司 | Hsdpa data caching method and mobile terminal |
| CN102239728B (en) * | 2009-08-14 | 2013-09-25 | 华为技术有限公司 | Data processing method and apparatus thereof |
| CN101699898B (en) * | 2009-11-03 | 2012-11-28 | 中兴通讯股份有限公司 | Method for transmitting grouped data in grouping service domain and system thereof |
| CN103634893B (en) * | 2012-08-20 | 2016-06-22 | 中兴通讯股份有限公司 | PDCP sequence number synchronization method and device |
| WO2014110786A1 (en) * | 2013-01-18 | 2014-07-24 | 华为技术有限公司 | Data transmission method and device |
| EP2974187A4 (en) | 2013-03-15 | 2016-11-23 | Synaptive Medical Barbados Inc | SYSTEM AND METHOD FOR RELIABLE MESSAGING BETWEEN APPLICATION SESSIONS UNDER VOLATILE NETWORKING CONDITIONS |
| WO2015066923A1 (en) | 2013-11-11 | 2015-05-14 | 华为技术有限公司 | Data transmission method and device |
| CN106304127B (en) * | 2015-05-13 | 2019-11-01 | 苏州简约纳电子有限公司 | A kind of LTE data surface downlink error-detection error-correction method |
| CN109429269B (en) * | 2017-08-22 | 2022-02-22 | 中国电信股份有限公司 | Dynamic serial number adjusting method, device and base station |
| CN113055425B (en) * | 2019-12-27 | 2022-04-05 | 大唐移动通信设备有限公司 | Data transmission method and device |
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| CN1396782A (en) * | 2001-07-09 | 2003-02-12 | Lg电子株式会社 | Block data service in radio communication system |
| CN1437368A (en) * | 2002-02-08 | 2003-08-20 | 华硕电脑股份有限公司 | Confirmation method for data transmission |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1396782A (en) * | 2001-07-09 | 2003-02-12 | Lg电子株式会社 | Block data service in radio communication system |
| CN1437368A (en) * | 2002-02-08 | 2003-08-20 | 华硕电脑股份有限公司 | Confirmation method for data transmission |
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