CN101136849A - Multilink data transmitting and receiving method and apparatus - Google Patents
Multilink data transmitting and receiving method and apparatus Download PDFInfo
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- CN101136849A CN101136849A CNA2007100006277A CN200710000627A CN101136849A CN 101136849 A CN101136849 A CN 101136849A CN A2007100006277 A CNA2007100006277 A CN A2007100006277A CN 200710000627 A CN200710000627 A CN 200710000627A CN 101136849 A CN101136849 A CN 101136849A
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Abstract
The method includes following steps: (1) adding the received data to the serial number of link (SNL), the link sender sends the added result to the link receiver and establishes retransmission queue in use for saving the having sent data; (2) the link receiver compares whether SNL of received data is equal to SNL of prearranged SNL; if not, then sending not acknowledgement message for link to the link sender to indicate that it is needed to retransmit data; (3) responding the said not acknowledgement message, the link sender looks over the retransmission queue; if there are data needed to retransmit in the retransmission queue, then sending data to the link receiver again.
Description
Technical field
The present invention relates to a kind of method that in communication system, media stream data is sent and receives by multilink and device, relate in particular to a kind of method and device that in the multi-carrier communications systems of CDMA (CDMA multiplexing) standard, transmits and receive data by a plurality of carrier waves.
Background technology
The CDMA 2000 of multicarrier (HRPD (high rate packet data) (HRPD) Rev B) system in the mode that adopts multicarrier on the basis of HRPD (high rate packet data) (HRPD) Rev A, more high-order modulating etc. makes on the peak rate, power system capacity, the availability of frequency spectrum of whole system large increase all.HRPD (high rate packet data) (CDMA 2000 HRPD) network is mainly by access terminal (AT), access network (AN), access network authentication and authorization charging (AccessNetwork Authentication Authorization and Accounting, abbreviate ANAAA as), packet data serving node (Packet Data Service Node abbreviates PDSN as), AAA equipment such as (authentication and authorization chargings) constitute.Equipment interface mainly comprises air interface, A10/A11 interface, A12 interface.Wherein, the function of A10/A11 interface and cdma2000 1X's is identical.The A12 interface connects AN (access network) and access network authentication and authorization charging (AN AAA), and this interface is mainly finished the authentication function of AN (access network) level.Fig. 1 shows the structured flowchart of CDMA 2000 HRPD systems.
Wherein, AN is a forward carriers to AT, and AT is reverse carrier wave to AN.Forward carriers and reverse carrier wave can be made of a plurality of carrier waves, and the transmission of data and reception can be carried out on one or more carrier waves therein.
The each several part function is as follows:
Access terminal (AT) terminal equipment of the access of radio network that the user uses;
Access network (AN), the network equipment that provides data to connect between Packet Data Network and AT comprises base station controller and base station receiver;
Packet Control Function unit (Packet Control Function abbreviates PCF as), mainly provide Radio Link and wire link mapping, call out functions such as control, mobile management, session management and data buffering and forwarding, charging information collecting;
Packet data serving node (PDSN) mainly provides link management, mobile management, and address assignment, charging information collecting, functions such as data route and tunnel encapsulation are supported the foreign agent functionality of mobile IP (mobile IP) simultaneously; And
Charge, Authentication Authorization server (AN AAA) mainly provides functions such as relevant authentication, mandate.
Data in multicarrier system from AN to AT send and can send on a plurality of carrier links, and existing multicarrier data send and receive and comprise step shown in Figure 2:
201, data sender sends to the link sender with packet, and data sender can corresponding multilink, and data sender adds sequence number with data, selects to send in multilink;
202, after the link sender receives the data of sending on the upper strata, add the sequence number of uplink to data, send the data to the link recipient of opposite end then;
203, after the link recipient receives the link layer bag, remove the sequence number of link layer, data are directly sent to Data Receiving person;
204, the link recipient compares hope link sequence number that obtains and the link sequence number of receiving, if it is identical then sequence number is added 1, if it is inequality then send a quick non-acknowledge message to Data Receiving person, on the notification data recipient link loss of data is arranged, the link layer sequence number of wishing the to receive sequence number that is set to just receive adds 1 simultaneously;
205, after Data Receiving person receives quick non-acknowledge message, send a non-acknowledge message of multilink to the data sender, wherein, carry the data that need re-transmission in the message;
206, after the data sender receives the non-acknowledge message of multilink, resolve the content in the message, and the data re-transmitting that will lose is given the link sender;
207, the link sender sends to the link recipient with data retransmission; And
208, the link recipient sends the data to Data Receiving person.Data Receiving person receives the data that a plurality of links transmit, and data are rearranged, and searches for the data passes that sequence number is continuous and gives upper layer application.
Yet, there is following problem in such scheme: efficiency of transmission is not high, when finding loss of data, the link recipient need report the recipient of data, send the sender of the non-acknowledge message of multilink by the recipient again to data, sender by data sends the data to the link sender then, the interface between data sender and the link sender has been passed through in the centre, this makes has increased the re-transmission time of data on the one hand, has increased the volume of transmitted data between data sender and the link sender on the other hand again; The system configuration complexity, non-acknowledge message of multilink and quick non-affirmation indication have been increased, make the sender and the Data Receiving person of data need handle more information, Data Receiving person and data sender will safeguard that it is clear inadequately to make that design realizes going up level to the information of each link; Can not guarantee the reliable transmission of every link, need data Layer that link layer is carried out correction process.
Therefore, need a kind of transmission of multilink data and the method for reception, can make data high efficient and reliable ground transmission under the multilink condition.
Summary of the invention
Consider the defective of prior art, the invention provides a kind of transmission mechanism of multilink data, its main purpose be make data can be efficiently under the condition of multilink, transmission reliably.
To achieve these goals, according to one embodiment of present invention, provide a kind of transmission method of multilink data.
This method may further comprise the steps: first step, and the link sender sends to the link recipient after the data that receive are added the uplink sequence number, and foundation is used to preserve the retransmission queue that has sent data; Second step, the link recipient compares the link sequence number of the data that receive with predetermined link sequence number, if the two difference then sends the non-acknowledge message of link that indication needs data retransmission to the link sender; And third step, in response to the non-acknowledge message of link, the link sender checks retransmission queue, if there are the data that need re-transmission in the retransmission queue, then sends data to the link recipient again.
Preferably, between the first step and second step, further comprise steps A: the link recipient sends the data to Data Receiving person after removing link data.
And in second step, the link recipient is when sending the non-acknowledge message of link, and the link sequence number that predetermined link sequence number is set to receive adds 1, and is under the two identical situation at link recipient's comparative result, will be scheduled to the link sequence number and add 1.
Preferably, in third step, before checking described retransmission queue, the link sender at first resolves the non-acknowledge message of link.
In addition, this method further may further comprise the steps: the 4th step, and the link recipient sends to Data Receiving person with the data that receive; The 5th step if Data Receiving person finds to have loss of data after receiving data, then sends the non-acknowledge message of data that indication needs data retransmission to the data sender; The 6th step, in response to the non-acknowledge message of data, the data that data sender will lose resend to the link sender; The 7th step, the link sender sends to the link recipient after the data that receive are added the uplink sequence number, and foundation is used to preserve the retransmission queue that has sent data; And the 8th step, the link recipient sends to Data Receiving person with described data, and Data Receiving person rearranges the data that receive, and the data passes that the link sequence number is continuous is used to the upper strata.
A kind of transmitting device of multilink data is provided according to another embodiment of the present invention.
This device comprises: retransmission queue is set up module, is positioned at the link transmitter side, is used to set up retransmission queue, and wherein, described retransmission queue is used to preserve the data that the link sender has sent; Whether link sequence number comparison module is positioned at the link receiver side, and the link sequence number and the predetermined link sequence number that are used for data that the link recipient is received compare, identical to determine the two; The non-acknowledge message sending module of link is positioned at the link receiver side, is used for sending the non-acknowledge message of link that indication needs data retransmission to the link sender; And the data re-transmission module, be positioned at the link transmitter side, in response to the non-acknowledge message of link, check described retransmission queue, if there are the data that need re-transmission in the retransmission queue, then send data to the link recipient again.
Wherein, be under the two different situation at the comparative result of link sequence number comparison module, the non-acknowledge message sending module of link sends the non-acknowledge message of link.When the non-acknowledge message sending module of link when sending the non-acknowledge message of described link, predetermined link sequence number is set to the link sequence number that the link recipient receives and adds 1.
By technique scheme of the present invention, realized following beneficial effect: the link retransmission queue can be set up, guaranteed reliability of link transmission and reliability of data transmission on each link.
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 structural representation that CDMA 2000 HRPD (HRPD (high rate packet data)) system is shown;
Fig. 2 illustrates the flow chart that the multilink data in the correlation technique sends and receives;
Fig. 3 is the flow chart according to the transmission method of the multilink data of the embodiment of the invention;
Fig. 4 is the signaling process figure according to the transmission method of the multilink data of the embodiment of the invention; And
Fig. 5 is the block diagram that illustrates according to the transmitting device of the multilink data of first embodiment of the invention.
Embodiment
The present invention proposes a kind of reception and sending method of new multilink data, it is provided with retransmission queue at link layer, this makes and has saved when needing data retransmission from the data sender to the transmission the link sender, therefore reduced data transmission period, solve the problem of the bandwidth that data retransmission takies, improved retransmission efficiency; In addition, simplified the handling process on upper strata, each link provides a transmission reliably for the upper strata, and the data cases in that the transmission and the receiving layer of data can be concerned about link layer makes level more clear.
Below, describe embodiments of the invention with reference to the accompanying drawings in detail.
First embodiment
Fig. 1 is the structural representation that CDMA 2000 HRPD systems are shown.
As shown in Figure 1, CDMA multiple carrier 2000 HRPD systems comprise AT, AN, AN AAA, PCF and PDSN.A9, A11 and A12 are the modern link of letter, and A8 and A10 are data link.Exist a plurality of carrier waves can transmit data between AN and AT, link of the present invention is corresponding with spendable carrier wave in this embodiment.
Be described in the process that transmits and receive data between AT and the AN with reference to Fig. 3 and Fig. 4.
As shown in Figure 3, the method according to first embodiment of the invention may further comprise the steps: step S302, link sender send to the link recipient after the data that receive are added the uplink sequence number, and foundation is used to preserve the retransmission queue that has sent data; Steps A: the link recipient sends the data to Data Receiving person after removing link data; Among the step S304, the link recipient compares the link sequence number of the data that receive with predetermined link sequence number, if the two difference then sends the non-acknowledge message of link that indication needs data retransmission to the link sender; Step S306, in response to the non-acknowledge message of link, the link sender checks retransmission queue, if there are the data that need re-transmission in the retransmission queue, then sends data to the link recipient again; In step S308, the link recipient sends to Data Receiving person with the data that receive; Step S310 if Data Receiving person finds to have loss of data after receiving data, then sends the non-acknowledge message of data that indication needs data retransmission to the data sender; Step S312, in response to the non-acknowledge message of data, the data that data sender will lose resend to the link sender; Step S314, the link sender sends to the link recipient after the data that receive are added the uplink sequence number, and foundation is used to preserve the retransmission queue that has sent data, simultaneously, the data that link will send are kept in the retransmission queue, so that the link recipient can retransmit these data when finding loss of data; Step S316, the link recipient sends the data to Data Receiving person, and Data Receiving person rearranges the data that receive, and the data passes that the link sequence number is continuous is used to the upper strata.
In step S302, data sender sends to the link sender with packet, data sender can corresponding multilink, data sender safeguards a variable V (S): the sequence number of the packet that the next one will transmit, in a new bag, make SEQ=V (S), if bag is byte stream, then the sequence number of i byte in the bag is SEQ+i.
Data sender add a data head in data after sends it, and data sender should keep it sufficiently long time before this bag of deletion after sending first.
Wherein, the header structure of packet is
| Field |
| SEQ |
SEQ is the sequence number of first byte in the packet.
After the link sender received the data of sending on the upper strata, the sender constructed a link bag by add the header structure of a link on packet, sends the data to the link recipient of opposite end then.
The link sender should safeguard a V (S) 1k, is used for being illustrated in this link next link bag to be sent.After a bag was sent out, V (S) 1k needed to add 1.The link recipient simultaneously, the data that sent is kept in the retransmission queue, so that can retransmit these data when finding loss of data.
Wherein, the link head-coating structure is:
| Field |
| LinkNumber |
| LKSEQIncluded |
| LKSEQ |
Wherein, LinkNumber: the identification number that should this field be set to this link for the link sender; LKSEQIncluded:, otherwise be set to 0 if comprise the LKSEQ field then this field is set to 1; And LKSEQ: if LKSEQIncluded equals 0, then ignore this field, if LKSEQIncluded equals 1, just this field is set to V (S) 1k.
After the link recipient receives the link layer bag, remove the header structure of link layer, data are directly sent to Data Receiving person.
The link recipient safeguards a variable V (R) 1k, and V (R) 1k is next sequence number of wishing the link bag received.
If do not comprise sequence number in the link bag, then do not carry out following processing.
Below, X represents the sequence number of a link bag that receives, for each link bag of receiving, and executable operations in the following order all:
If X=V (R) is 1k, V (R) 1k is set to X+1;
If X＜V (R) is 1k, the data sender and the recipient of the link that then resets;
If X〉V (R) 1k, should send a non-acknowledge message of link to the link sender, on the notice link sender link loss of data is arranged, need data retransmission;
V (R) 1k is set to X+1, and wherein, the LinkNak message structure is as follows:
| Field |
| LinkNumber |
| LeadingEdge |
| TrailingEdge |
Wherein, LinkNumber: the link recipient should this field be set to the identification number of this link; LeadingEdge: lose the start sequence number of byte, this value is set to V (R) 1k; And TrailingEdge: lose the termination sequence number of byte, this value is set to X.
In step S304, the link recipient compares the link sequence number of the data that receive with predetermined link sequence number, if the two difference then sends the non-acknowledge message of link that indication needs data retransmission to the link sender.Wherein, the non-acknowledge message structure of data is as follows:
| Field |
| FlowNumber |
| ReportCount |
| FirstErasedDataUnit |
| WindowLen |
| VR |
Wherein, FlowNumber: Data Receiving person should this field be set to the identification number of this data flow; ReportCount: for needing the quantity of re-transmitting data block, the data block that retransmit is determined by FirstErasedDataUnit and WindowLen, should comprise two fields below ReportCount; FirstErasedDataUnit: first byte number that is set to lose block of bytes; WindowLen: the quantity that is set to lose byte; And VR: the sequence number of the next byte that hope is received.
And in step S306, the data of re-transmission comprise the data between LeadingEdge and the TrailingEdge, and it is 0 that LKSEQIncluded is set in the head-coating structure of data retransmission.
In addition, among the step S304, the link recipient is when sending the non-acknowledge message of link, and the link sequence number that predetermined link sequence number is set to receive adds 1, and when link recipient's comparative result be under the two identical situation, will be scheduled to the link sequence number and add 1.
The signaling process of this method is described the same as shown in Figure 4.
Second embodiment
Fig. 5 is the block diagram according to the transmitting device of the multilink data of second embodiment of the invention.
As shown in Figure 5, transmitting device 500 according to the multilink data of the embodiment of the invention comprises: retransmission queue is set up module 502, is positioned at the link transmitter side, is used to set up retransmission queue, wherein, described retransmission queue is used to preserve the data that the link sender has sent; Whether link sequence number comparison module 504 is positioned at the link receiver side, and the link sequence number and the predetermined link sequence number that are used for data that the link recipient is received compare, identical to determine the two; The non-acknowledge message sending module 506 of link is positioned at the link receiver side, is used for sending the non-acknowledge message of link that indication needs data retransmission to the link sender; And data re-transmission module 508, be positioned at the link transmitter side, in response to the non-acknowledge message of link, check described retransmission queue, if there are the data that need re-transmission in the retransmission queue, then send data to the link recipient again.
Wherein, be under the two different situation at the comparative result of link sequence number comparison module 504, the non-acknowledge message sending module of link sends the non-acknowledge message of link.
And the non-acknowledge message sending module 506 of link is when sending the non-acknowledge message of described link, and predetermined link sequence number is set to the link sequence number that the link recipient receives and adds 1.
Technical solution of the present invention is by being provided with retransmission queue at link layer, retransmission mechanism is provided, the high-efficiency reliable link layer is provided, simultaneously separate at the transmission and the link layer of data transfer layer, a kind of high-efficiency reliable multilink data transmission means that can be used in the multicarrier system is provided.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the transmission method of a multilink data is characterized in that, may further comprise the steps:
First step, the link sender sends to the link recipient after the data that receive are added the uplink sequence number, and foundation is used to preserve the retransmission queue that has sent data;
Second step, the link recipient compares the link sequence number of the data that receive with predetermined link sequence number, if the two difference then sends the non-acknowledge message of link that indication needs data retransmission to described link sender; And
Third step, in response to the non-acknowledge message of described link, described link sender checks described retransmission queue, if there are the data that need re-transmission in the described retransmission queue, then sends described data to described link recipient again.
2. method according to claim 1 is characterized in that, between described first step and described second step, further may further comprise the steps:
Steps A: described link recipient sends to Data Receiving person with described data after removing described link data.
3. method according to claim 1 is characterized in that, in described second step, described link recipient is when sending the non-acknowledge message of described link, and the link sequence number that described predetermined link sequence number is set to receive adds 1.
4. method according to claim 1 is characterized in that, in described second step, is under the two identical situation at described link recipient's comparative result, and described predetermined link sequence number is added 1.
5. method according to claim 1 is characterized in that, in described third step, before checking described retransmission queue, described link sender at first resolves the non-acknowledge message of described link.
6. method according to claim 1 is characterized in that, further may further comprise the steps:
The 4th step, described link recipient sends to Data Receiving person with the data that receive;
The 5th step if described Data Receiving person finds to have loss of data after receiving described data, then sends the non-acknowledge message of data that indication needs data retransmission to the data sender; And
The 6th step, in response to the non-acknowledge message of described data, the data that described data sender will lose resend to the link sender.
7. method according to claim 6 is characterized in that, further may further comprise the steps:
The 7th step, described link sender sends to described link recipient after the data that receive are added the uplink sequence number, and foundation is used to preserve the retransmission queue that has sent data;
The 8th step, described link recipient sends to described Data Receiving person with described data, and described Data Receiving person rearranges the data that receive, and the data passes that the link sequence number is continuous is used to the upper strata.
8. the transmitting device of a multilink data is characterized in that, comprising:
Retransmission queue is set up module, is positioned at the link transmitter side, is used to set up retransmission queue, and wherein, described retransmission queue is used to preserve the data that the link sender has sent;
Whether link sequence number comparison module is positioned at the link receiver side, and the link sequence number and the predetermined link sequence number that are used for data that the link recipient is received compare, identical to determine the two;
The non-acknowledge message sending module of link is positioned at the link receiver side, is used for sending the non-acknowledge message of link that indication needs data retransmission to the link sender; And
The data re-transmission module is positioned at the link transmitter side, in response to the non-acknowledge message of described link, checks described retransmission queue, if there are the data that need re-transmission in the described retransmission queue, then sends described data to described link recipient again.
9. device according to claim 8 is characterized in that, is under the two different situation at the comparative result of described link sequence number comparison module, and the non-acknowledge message sending module of described link sends the non-acknowledge message of described link.
10. device according to claim 9 is characterized in that, the non-acknowledge message sending module of described link is when sending the non-acknowledge message of described link, and described predetermined link sequence number is set to the link sequence number that the link recipient receives and adds 1.
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| CNA2007100006277A CN101136849A (en) | 2007-01-09 | 2007-01-09 | Multilink data transmitting and receiving method and apparatus |
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| CNA2007100006277A CN101136849A (en) | 2007-01-09 | 2007-01-09 | Multilink data transmitting and receiving method and apparatus |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106330414A (en) * | 2016-08-16 | 2017-01-11 | 杭州华三通信技术有限公司 | Message transmission method and device |
| CN109067503A (en) * | 2018-09-21 | 2018-12-21 | 郑州云海信息技术有限公司 | A kind of data repeating method and device |
| WO2020207180A1 (en) * | 2019-04-12 | 2020-10-15 | 展讯通信（上海）有限公司 | Data frame retransmission method and device |
| CN113992607A (en) * | 2021-09-09 | 2022-01-28 | 新华三信息安全技术有限公司 | Message processing method and device |
| CN114979313A (en) * | 2022-06-13 | 2022-08-30 | 深圳市宏电技术股份有限公司 | Data supplementary reporting method and device for communication equipment, communication equipment and storage medium |
-
2007
- 2007-01-09 CN CNA2007100006277A patent/CN101136849A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106330414A (en) * | 2016-08-16 | 2017-01-11 | 杭州华三通信技术有限公司 | Message transmission method and device |
| CN106330414B (en) * | 2016-08-16 | 2021-03-26 | 新华三技术有限公司 | Message transmission method and device |
| CN109067503A (en) * | 2018-09-21 | 2018-12-21 | 郑州云海信息技术有限公司 | A kind of data repeating method and device |
| CN109067503B (en) * | 2018-09-21 | 2021-06-29 | 郑州云海信息技术有限公司 | Data retransmission method and device |
| WO2020207180A1 (en) * | 2019-04-12 | 2020-10-15 | 展讯通信（上海）有限公司 | Data frame retransmission method and device |
| US11424870B2 (en) | 2019-04-12 | 2022-08-23 | Spreadtrum Communications (Shanghai) Co., Ltd. | Data frame retransmission method and device |
| CN113992607A (en) * | 2021-09-09 | 2022-01-28 | 新华三信息安全技术有限公司 | Message processing method and device |
| CN113992607B (en) * | 2021-09-09 | 2023-11-03 | 新华三信息安全技术有限公司 | Message processing method and device |
| CN114979313A (en) * | 2022-06-13 | 2022-08-30 | 深圳市宏电技术股份有限公司 | Data supplementary reporting method and device for communication equipment, communication equipment and storage medium |
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