CN103582013A - Downlink transmission method of packet data convergence protocol data - Google Patents
Downlink transmission method of packet data convergence protocol data Download PDFInfo
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- CN103582013A CN103582013A CN201210284850.XA CN201210284850A CN103582013A CN 103582013 A CN103582013 A CN 103582013A CN 201210284850 A CN201210284850 A CN 201210284850A CN 103582013 A CN103582013 A CN 103582013A
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Abstract
The invention discloses a downlink transmission method of packet data convergence protocol (PDCP) data. According to the method, data labels are established for the PDCP, corresponding RLC protocol and MAC protocol processing operation is carried out according to the data labels, data storing and reading frequency during transmission can be effectively lowered, then the expenditure of a system for processing resources can be lowered, and data transmission processing efficiency is improved.
Description
Technical field
The present invention relates to wireless communication technology, particularly relate to the downlink transmission method of a kind of PDCP (PDCP) data.
Background technology
In current wireless communication system, PDCP data need to be sent to physical layer after the protocol layer below PDCP layer (being Mac layer and rlc layer) is processed, and then by physical layer, send.At medium access control (Medium Access Control, Mac) in the process that layer and wireless link control (RLC) layer are processed PDCP data, need to, by work flow order, successively be respectively these PDCP data and set up the datagram header of respective protocol layer and set up datagram header and this PDCP data are bound in the service buffer that is stored in protocal layers.
Like this, in PDCP data, from PDCP layer, be transferred to the process of physical layer, just need to successively carry out the copy of business datum and move, organize the operations such as bag, in protocol stack inside, will form 4 times of data flow to service traffics in copy circulation.Obviously, this needs are the operation of data copy, group bag repeatedly, can consume more system and process resource, increases the processing delay of transfer of data, thus the further lifting of restriction system disposal ability.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of downlink transmission method of PDCP data, can improve the efficiency of transmission of data.
In order to achieve the above object, the technical scheme that the present invention proposes is:
A downlink transmission method for PDCP data, comprising:
In each dispatching cycle, when wireless link control rlc layer receives PDCP PDCP downlink data, described PDCP downlink data is saved in memory block;
When there is descending scheduling, medium access control Mac layer is according to the interface-free resources size of this scheduling authorization, the data that need to transmit for current descending scheduling, set up corresponding data label or carry out the renewal of data label, described data label comprises the stored position information that is used to indicate data and the relevant parameter that carries out protocol processes for rlc layer and medium access control Mac layer;
Described Mac layer triggers described rlc layer according to described data label, for corresponding data generate rlc protocol header, after described rlc protocol header is kept in described data label, sends to described Mac layer;
Described Mac layer receives after described data label, according to described data label, for corresponding data generate Mac protocol header, described Mac protocol header is deposited in described data label, and trigger according to described data label and generate and can be transferred to the business datum of physical layer, and described business datum is sent to physical layer.
In sum, the downlink transmission method of the PDCP data that the present invention proposes, by setting up data label for PDCP data, and carry out corresponding protocol processes operation according to data label, storage and the reading times of data in the time of can effectively reducing transmission, and then can minimizing system process the expense of resource, improve the treatment effeciency of transfer of data.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the embodiment of the present invention one.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Core concept of the present invention is: consider that Mac layer and rlc layer are for data, to set up corresponding protocol header then this protocol header and data to be combined and stored to the protocol processes of data, because these processing are not the direct controls to data, therefore, can be in the data dispatch process of eating dishes without rice or wine, first for it sets up data label, in data label, will record the physical storage locations of PDCP data and for rlc layer and Mac layer, carry out the relevant parameter of protocol processes.Like this, in the process that Mac layer and rlc layer are processed PDCP data, only to transmitting the label of data, operate, can complete the protocol processes operation to PDCP data of Mac layer and rlc layer, according to data label, be that PDCP data are set up the protocol header of protocal layers and set up protocol header is temporarily stored in label, finally according to the physical storage locations information in data label, read corresponding business datum again and the datagram header of each layer and corresponding business datum are assembled, obtaining the data that can send in physical layer.In said process, only need the storage of a secondary data and read, therefore, can minimizing system process the expense of resource, improve the treatment effeciency of transfer of data.
Fig. 1 is the schematic flow sheet of the embodiment of the present invention one, and as shown in Figure 1, the method comprises:
Step 101, in each dispatching cycle, when rlc layer receives PDCP downlink data, described PDCP downlink data is saved in memory block.
Step 102, when there is descending scheduling, Mac layer is according to the interface-free resources size of this scheduling authorization, the data that need to transmit for current descending scheduling, set up corresponding data label or carry out the renewal of data label, described data label comprises the stored position information that is used to indicate data and the relevant parameter that carries out protocol processes for rlc layer and Mac layer.
Here, with existing system difference be: adopt this step, when having scheduling authorization, need to be first for data to be transferred is set up or upgrade corresponding data label, in this data label, the stored position information that is used to indicate data and the relevant parameter that carries out protocol processes for rlc layer and Mac layer will be comprised, so that after this RLC and Mac layer can carry out corresponding protocol processes based on data label, and need to the data based on actual not carry out relevant protocol processes.
Here, for rlc layer and Mac layer, carry out the relevant parameter of protocol processes and grasped by those skilled in the art, do not repeat them here.
The described data that need to transmit for current descending scheduling, the renewal of setting up corresponding data label or carrying out data label comprises:
When there is descending scheduling, if the data that current descending scheduling need to transmit are mixed automatic retransfer request (HARQ) new biography data, according to the interface-free resources size of this scheduling authorization, for the new biography data of this scheduling are set up data label; If the data that current descending scheduling need to transmit are HARQ data retransmissions,, according to the interface-free resources size of this scheduling authorization, the data label of the data retransmission of this scheduling is upgraded.
Here, the data that HARQ new biography data are transmitted first, for HARQ new biography data, the same with existing system, need to be according to the interface-free resources size of this scheduling authorization, from data to be transmitted, determine the current new biography data that can dispatch, specifically determine that method is grasped by those skilled in the art, do not repeat them here.
In this step, for HARQ data retransmission, due to when these data are transmitted first for it sets up corresponding data label, therefore, only need corresponding data label to upgrade here, data label is consistent with corresponding data.According to can the satisfy the demand complete transmission of data retransmission of the interface-free resources of authorizing, the specific implementation of described renewal will be divided two types, a kind of is the restructuring of data label, a kind of is the division of data label, the former is in the situation that the interface-free resources of this scheduling authorization can meet the complete transmission of current needs data retransmission carries out, now only need to modify to old data label, the latter is in the situation that the interface-free resources of this scheduling authorization can not meet the complete transmission of current needs data retransmission carries out, now due to can only hop data, therefore, treat that data retransmission will be divided into two parts, a part is current scheduling transmission, part current scheduling can not be transmitted, therefore, to set up data label for the data of current scheduling transmission on the one hand, to be the existing data label of data modification not retransmitting on the one hand.The concrete grammar of two kinds of renewals comprises:
If the interface-free resources of this scheduling authorization can meet the complete transmission of current needs data retransmission, the described data label of data retransmission that needs is modified, making only to comprise in amended data label to described needs the information that data retransmission is relevant;
If the interface-free resources of this scheduling authorization can not meet the complete transmission of current needs data retransmission, according to the interface-free resources of this scheduling authorization, from the current data of determining that this scheduling can retransmit of needing data retransmission, and set up described data label for determined data, the described data retransmission not being transmitted for this scheduling, revise corresponding data label, make only to comprise in amended data label the information relevant to the described described data retransmission not being transmitted.
Step 103, described Mac layer trigger described rlc layer according to described data label, for corresponding data generate rlc protocol header, after described rlc protocol header is kept in described data label, send to described Mac layer.
In this step, the same existing system of concrete generation method of rlc protocol header, does not repeat them here.
Step 104, described Mac layer receive after described data label, according to described data label, for corresponding data generate Mac protocol header, described Mac protocol header is deposited in described data label, and trigger according to described data label and generate and can be transferred to the business datum of physical layer, and described business datum is sent to physical layer.
In this step, the same existing system of concrete generation method of Mac protocol header, does not repeat them here
The concrete grammar that can be transferred to the business datum of physical layer according to described data label generation here, comprises:
According to described data label, from described memory block, obtain corresponding data, and the rlc protocol header of preserving in obtained data and described data label and Mac protocol header are combined, obtain described business datum.
Here, the form of concrete data and header combination, same existing system, does not repeat them here.
In actual applications, in order to improve the utilization rate of data label resource, can be when receiving the feedback that data successfully receive, data label corresponding to data that described success is received is designated and can discharges label.Like this, can adopt the combination of following one or more modes to realize the timely release of data label, to save the expense of system resource.
Mode one, after completing described generation and can being transferred to the business datum of physical layer, the current data label resource that can discharge label that is designated is discharged.
Mode two, according to default label deenergized period, the current data label resource that can discharge label that is designated is discharged.
By such scheme, can find out, the present invention receive PDCP data to convert to can this process of data in physical layer transmission in, only the data that will transmit are once stored and once read, effectively reduced the read-write operation of data, and then can improve the treatment effeciency of data in transmitting procedure, on protocol stack structure after sharing data management function, be simplified in addition, improved system reliability.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a downlink transmission method for PDCP data, is characterized in that, comprising:
In each dispatching cycle, when wireless link control rlc layer receives PDCP PDCP downlink data, described PDCP downlink data is saved in memory block;
When there is descending scheduling, medium access control Mac layer is according to the interface-free resources size of this scheduling authorization, the data that need to transmit for current descending scheduling, set up corresponding data label or carry out the renewal of data label, described data label comprises the stored position information that is used to indicate data and the relevant parameter that carries out protocol processes for rlc layer and medium access control Mac layer;
Described Mac layer triggers described rlc layer according to described data label, for corresponding data generate rlc protocol header, after described rlc protocol header is kept in described data label, sends to described Mac layer;
Described Mac layer receives after described data label, according to described data label, for corresponding data generate Mac protocol header, described Mac protocol header is deposited in described data label, and trigger according to described data label and generate and can be transferred to the business datum of physical layer, and described business datum is sent to physical layer.
2. method according to claim 1, is characterized in that, the described data that need to transmit for current descending scheduling, and the renewal of setting up corresponding data label or carrying out data label comprises:
When there is descending scheduling, if the data that current descending scheduling need to transmit are mixed automatic retransfer request HARQ new biography data, according to the interface-free resources size of this scheduling authorization, for the new biography data of this scheduling are set up data label; If the data that current descending scheduling need to transmit are HARQ data retransmissions,, according to the interface-free resources size of this scheduling authorization, the data label of the data retransmission of this scheduling is upgraded.
3. method according to claim 2, is characterized in that, described renewal comprises:
If the interface-free resources of this scheduling authorization can meet the complete transmission of current needs data retransmission, the described data label of data retransmission that needs is modified, making only to comprise in amended data label to described needs the information that data retransmission is relevant;
If the interface-free resources of this scheduling authorization can not meet the complete transmission of current needs data retransmission, according to the interface-free resources of this scheduling authorization, from the current data of determining that this scheduling can retransmit of needing data retransmission, and set up described data label for determined data, the described data retransmission not being transmitted for this scheduling, revise corresponding data label, make only to comprise in amended data label the information relevant to the described described data retransmission not being transmitted.
4. method according to claim 1, is characterized in that, the business datum that can be transferred to physical layer according to described data label generation comprises:
According to described data label, from described memory block, obtain corresponding data, and the rlc protocol header of preserving in obtained data and described data label and Mac protocol header are combined, obtain described business datum.
5. method according to claim 1, is characterized in that, described method further comprises:
When receiving the feedback that data successfully receive, data label corresponding to data that described success is received is designated and can discharges label.
6. method according to claim 5, is characterized in that, described method further comprises:
After completing described generation and can being transferred to the business datum of physical layer, the current data label resource that can discharge label that is designated is discharged.
7. method according to claim 5, is characterized in that, described method further comprises:
According to default label deenergized period, the current data label resource that can discharge label that is designated is discharged.
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| CN201210284850.XA CN103582013B (en) | 2012-08-10 | 2012-08-10 | The downlink transmission method of PDCP data |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108353092A (en) * | 2015-11-02 | 2018-07-31 | 英特尔Ip公司 | In physical layer convergence protocol（PLCP）Protocol Data Unit（PPDU）The middle devices, systems, and methods for carrying out control information communication |
| CN112312174A (en) * | 2019-07-31 | 2021-02-02 | 大唐移动通信设备有限公司 | Video service acceleration method and device |
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| WO2006073100A1 (en) * | 2005-01-05 | 2006-07-13 | Matsushita Electric Industrial Co., Ltd. | Communication apparatus, communication system and communication method |
| CN101583165A (en) * | 2009-06-08 | 2009-11-18 | 中兴通讯股份有限公司 | Inter-standard switching method ensuring lossless transmission of packet-switched domain data and device |
| CN101686564A (en) * | 2008-09-22 | 2010-03-31 | 宏达国际电子股份有限公司 | Method of generating a buffer status for a wireless communication system and related device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1695354A (en) * | 2002-04-08 | 2005-11-09 | Lg电子株式会社 | Mobile communication method and system |
| WO2006073100A1 (en) * | 2005-01-05 | 2006-07-13 | Matsushita Electric Industrial Co., Ltd. | Communication apparatus, communication system and communication method |
| CN101686564A (en) * | 2008-09-22 | 2010-03-31 | 宏达国际电子股份有限公司 | Method of generating a buffer status for a wireless communication system and related device |
| CN101583165A (en) * | 2009-06-08 | 2009-11-18 | 中兴通讯股份有限公司 | Inter-standard switching method ensuring lossless transmission of packet-switched domain data and device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108353092A (en) * | 2015-11-02 | 2018-07-31 | 英特尔Ip公司 | In physical layer convergence protocol（PLCP）Protocol Data Unit（PPDU）The middle devices, systems, and methods for carrying out control information communication |
| CN108353092B (en) * | 2015-11-02 | 2021-12-31 | 英特尔公司 | Apparatus, system, and method for communicating control information in protocol data units of a physical layer convergence protocol |
| CN112312174A (en) * | 2019-07-31 | 2021-02-02 | 大唐移动通信设备有限公司 | Video service acceleration method and device |
| CN112312174B (en) * | 2019-07-31 | 2022-04-01 | 大唐移动通信设备有限公司 | Video service acceleration method and device, electronic equipment and storage medium |
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