CN101729524A - Data processing method, data processing device, RLC entity and PDCP entity - Google Patents
Data processing method, data processing device, RLC entity and PDCP entity Download PDFInfo
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Abstract
The invention provides a data processing method, a data processing device, an RLC entity and a PDCP entity. The method comprises that: the radio link control RLC entity transmits data from the packet data convergence protocol PDCP entity and then transmits a data transmission notice to the PDCP entity; and the PDCP entity receives the data transmission notice, searches for the corresponding data from the cached data of the PDCP entity according to the data transmission notice and deletes the searched data. The data processing method is favorable for saving a storage space of the PDCP entity and improving the utilization ratio of the memory resources of the PDCP entity.
Description
Technical field
The present invention relates to the network communications technology, particularly a kind of data processing method, device, Radio Link control (RLC) entity and PDCP (PDCP) entity.
Background technology
At present, in the network communications technology, in order to guarantee the validity of transfer of data, usually at the PDCP layer, be specially after the PDCP entity receives PDCP service data unit (SDU) from the upper strata, this PDCP SDU of PDCP entity stores, wherein, PDCP SDU is the data transmission block on the corresponding transmission channel, wherein, why the PDCP entity stores PDCP SDU, its objective is that the follow-up data that will receive according to the indication of bottom send in the past, if sending one, bottom need the indication of PDCP SDU information (carrying the serial number that needs PDCP SDU in this information) to give the PDCP entity, then the PDCP entity is searched corresponding PDCP SDU in the PDCP of its storage SDU, and concrete afterwards processing method can be referring to Fig. 1, and Fig. 1 is existing data processing method flow chart, as shown in Figure 1, this flow process may further comprise the steps:
Before execution in step 101, the PDCP entity can pre-determine each PDCP SDU that will receive, afterwards, for each PDCP SDU is provided with the corresponding timer that abandons, like this, step 101 is specially: behind the PDCP SDU of the current reception of PDCP entity stores, start the timer that abandons of this PDCP SDU correspondence.
Here, the PDCP entity is to utilize the transformation rule of defined in the PDCP agreement that this PDCPSDU is transformed into corresponding PDCP PDU, wherein, PDCP PDU is the data block that is used for the PDCP entity transmission, so, and RLC, be specially the RLC entity and receive PDCPPDU (usually from above-mentioned PDCP entity, after PDCP PDU arrived RLC, this PDCP PDU was called as RLC SDU), just can store the PDCP PDU of this reception.
Need to prove that after the RLC entity received PDCP PDU, the RLC entity also can send this PDCP PDU, specifically can be: the RLC entity is transformed into corresponding RLC PDU according to protocol rule with PDCP PDU to be sent earlier, afterwards, this RLC PDU is sent.
Here, this time that pre-sets that abandons timer is depended on the network delay between PDCP entity and the RLC entity.
Here, the PDCP SDU information of deletion can comprise: the pairing serial number of PDCP SDU of deletion.
So, the RLC entity stops the transmission of the pairing PDCPPDU of PDCP SDU information in the above-mentioned deletion notice.
As can be seen, in the flow chart of data processing of the prior art, after receiving PDCP SDU, just need preserve the PDCP entity relevant information of this PDCP SDU, up to the timer expiry that abandons of the correspondence of judging startup always.Like this, will there be a problem, after if the PDCP entity receives PDCPSDU from the upper strata, form PDCP PDU immediately and send to the RLC entity, the very fast again composition of RLC entity RLC PDU sends the used time and is total up to 50ms, and abandon the time span that timer pre-sets is 1500ms, like this, adopt the data processing method of prior art, the time that the PDCP entity will be stored 1500-50=1450ms to this PDCP SDU more, like this, will waste the memory source of PDCP entity greatly.
Summary of the invention
The invention provides a kind of data processing method, device, RLC entity and PDCP entity, so that improve the memory source utilance of PDCP entity.
A kind of data processing method, this method comprises:
RLC will send data transmission notice to described PDCP after will sending from the data of PDCP entity;
Described PDCP receives this data transmission notice, searches corresponding data according to this data transmission notice in self data in buffer, and the data that find of deletion.
A kind of data processing equipment comprises: RLC entity and PDCP entity, wherein,
Described RLC entity will send data transmission notice to described PDCP entity after will sending from the data of PDCP entity;
Described PDCP entity receives this data transmission notice, searches corresponding data according to this data transmission notice in self data in buffer, and the data that find of deletion.
A kind of RLC entity comprises: receiving element and transmitting element; Wherein,
Described Data Receiving unit is used to receive the data from the PDCP entity;
Described transmitting element is used to send the data that described Data Receiving unit receives, and after sending these data, sends data transmission notice to described PDCP entity.
A kind of PDCP entity comprises: notice receiving element and processing unit; Wherein,
Described notice receiving element is used to receive the data transmission notice that sends from the RLC entity;
Described processing unit is used for searching corresponding data according to this data transmission notice in self data in buffer, and the data that find of deletion.
Above technical scheme in data processing method provided by the invention, device, RLC entity and PDCP entity, after will sending from the data of PDCP by RLC, sends data transmission notice to described PDCP as can be seen; Described PDCP receives this data transmission notice, searches corresponding data according to this data transmission notice in self data in buffer, and the data that find of deletion.Because RLC will be after will sending from the data of PDCP, in time send data transmission notice to described PDCP, like this, than prior art, can guarantee that PDCP knows that in time RLC sends data conditions, and then realize that PDCP sends data conditions according to the RLC of knowing, in time deletes the corresponding data of self storing, save the memory space of PDCP, improve the memory source utilance of PDCP.
Description of drawings
Fig. 1 is the flow chart of data processing method of the prior art;
The basic flow sheet of the data processing method that Fig. 2 provides for the embodiment of the invention;
The detail flowchart of the data processing method that Fig. 3 provides for the embodiment of the invention;
The data processing equipment structure chart that Fig. 4 provides for the embodiment of the invention;
The structure chart of the RLC entity that Fig. 5 provides for the embodiment of the invention;
The structure of the PDCP entity that Fig. 6 provides for the embodiment of the invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
Data processing method provided by the invention is applied between PDCP and the RLC, between PDCP and RLC, connect, as shown in Figure 2, the basic flow sheet of the data processing method that Fig. 2 provides for the embodiment of the invention, as shown in Figure 2, this method mainly may further comprise the steps:
Below in conjunction with specific embodiment said method provided by the present invention is described in detail.
The detail flowchart of the data processing method that Fig. 3 provides for the embodiment of the invention.Among this embodiment, the mode of operation of RLC can have various ways, as can or being Unacknowledged Mode etc. for affirmation mode, present embodiment is that affirmation mode is an example with the mode of operation of RLC, behind the PDCP SDU of PDCP reception from high level, because the PDCP layer only is present in user interface, therefore, above-mentioned high level is meant application layer, and as shown in Figure 3, this flow process can may further comprise the steps:
Particularly, step 301 can be the PDCP SDU of this reception of PDCP entity buffer memory.
In the present embodiment, PDCP can be cut apart or cascade this PDCP SDU, forms the PDCP PDU of this PDCPSDU correspondence, specifically can this PDCP SDU be transformed into corresponding PDCP PDU according to the transform method of prior art, repeats no more here.
Particularly, step 302 can be PDCP this PDCP SDU is transformed into corresponding PDCP PDU, sends this PDCP PDU to the RLC entity.
In the present embodiment, RLC can be cut apart or cascade this PDCP PDU, forms the RLC PDU of this PDCPPDU correspondence, specifically can this PDCP PDU be transformed into corresponding RLC PDU according to the transform method of prior art, repeats no more here.
In the present embodiment, the number that PDCP PDU is transformed into corresponding RLC PDU can be one, also can be a plurality ofly, and present embodiment does not limit this.
Here, the opposite end can be an end that needs to receive the RLC PDU that sends from RLC, and it also can be the RLC of other sub-district correspondences.
In this step, be one if PDCP PDU is transformed into the number of corresponding RLC PDU, then RLC sends this integral body RLC PDU to the opposite end; If it is a plurality of that PDCP PDU is transformed into the number of corresponding RLC PDU, then RLC can send RLC PDU successively to the opposite end.
Here, because the mode of operation of RLC is an affirmation mode in the present embodiment, therefore, RLC need judge whether the RLC PDU of current transmission is successfully received by the opposite end, particularly, this RLC judges that the operation whether the RLC PDU of current transmission is successfully received by the opposite end can comprise: if the opposite end is after receiving the RLC PDU that sends from this RLC, send and confirm to be notified to this RLC, in the time that RLC is pre-seting, receive this affirmation notice, then the RLC RLC PDU that judges current transmission is successfully received by the opposite end, otherwise the RLC PDU that RLC judges current transmission is not successfully received process ends by the opposite end.
Need to prove that in the present embodiment, if the mode of operation of RLC is a Unacknowledged Mode, then step 305 can be omitted.
Step 306, RLC sends data transmission notice to PDCP.
Here, above-mentioned data transmission notice comprises the pairing all PDCP PDU information of RLC PDU of the current transmission of RLC, and wherein, this PDCP PDU information can be the pairing serial number of PDCP PDU.
So far, realized the flow process of the data processing method that present embodiment provides.
Preferably, in the present embodiment, when the mode of operation of RLC is affirmation mode, can judge further in the step 308 whether the pairing serial number of PDCP PDU that comprises in the PDCP PDU information that provides from RLC is continuous, if search continuously, the operation of corresponding PDCP SDU among the PDCP SDU that can continue to carry out at self buffer memory; Otherwise, do not carry out the operation of in the PDCP SDU of self buffer memory, searching corresponding PDCPSDU, till the pairing serial number of PDCP PDU that comprises is continuous in the PDCP PDU information that RLC provided.Certainly, behind the pairing serial number of PDCP PDU that PDCP also can comprise in receiving the PDCPPDU information that RLC provides in the present embodiment, directly PDCP searches corresponding PDCP SDU in the PDCP SDU of self buffer memory, and present embodiment does not limit this.
Need to prove that be further to improve the memory source utilance of PDCP, in the present embodiment, step 301 is replaceable to be: the PDCP SDU of this reception of PDCP buffer memory, and start the timer of this PDCP SDU correspondence.Wherein, the step 301 after the replacement specifically can be: the PDCPSDU of this reception of PDCP buffer memory, and start the timer of free time in the timer that this PDCP is provided with in advance; Perhaps, PDCP SDU that the PDCP buffer memory should receive when the timer of the current PDCP SDU correspondence that does not have this reception, creates and starts timer to the PDCP SDU that should receive.
In addition, PDCP is before the operation of the reception data transmission notice described in the step 307, whether the timer that also needs real-time judge to start does not surpass the time that presets, if, after receiving data transmission notice, obtain the pairing all PDCP PDU of the RLC PDU that comprises in this data transmission notice in the execution in step 307, and the PDCP SDU that in the PDCP SDU of self buffer memory, searches this all PDCP PDU correspondence in the step 308, and the operation of deleting the PDCP SDU that finds, otherwise, handle the PDCP SDU of this overtime timer correspondence according to method of the prior art.Other steps are constant, no longer describe in detail here.
More than be the detailed description that method provided by the present invention is carried out, the device to data processing provided by the present invention is described below.The structure chart of the data processing equipment that Fig. 4 provides for the embodiment of the invention, as shown in Figure 4, this device comprises: RLC entity 401 and PDCP entity 402.
Wherein, RLC entity 401 will send data transmission notice to described PDCP entity 402 after will sending from the data of PDCP entity 402.
Preferably, during RLC entity specific implementation, multiple version can be arranged.Referring to Fig. 5, Fig. 5 is a kind of concrete structure figure of RLC entity, and as shown in Figure 5, this RLC entity can comprise: Data Receiving unit 501 and transmitting element 502.
Wherein, Data Receiving unit 501 is used to receive the data from the PDCP entity.
Transmitting element 502 is used to send the data that Data Receiving unit 501 receives, and after sending these data, sends data transmission notice to described PDCP entity.
Preferably, Data Receiving unit 501 can receive the PDCP PDU from described PDCP entity.
Shown in the dotted line among Fig. 5, this RLC entity further can comprise: first converter unit 503.
Wherein, first converter unit 503 is used for the PDCP PDU that Data Receiving unit 501 receives is transformed into corresponding RLC PDU.
Transmitting element 502 sends described RLC PDU.
Preferably, if the work at present pattern is an affirmation mode, then shown in the dotted line among Fig. 5, this RLC entity further can comprise: judging unit 504.
Wherein, judging unit 504 is used to judge whether the RLC PDU of current transmission is successfully received by the opposite end, if then send and successfully be notified to transmitting element 502.
Transmitting element 502 receives after this successfully notifies, and sends data transmission notice to described PDCP entity.
Wherein, described data transmission notice comprises the pairing PDCP PDU of RLC PDU of current transmission.
During PDCP entity specific implementation, multiple version can be arranged.Referring to Fig. 6, Fig. 6 is a kind of concrete structure figure of PDCP entity, and as shown in Figure 6, this PDCP entity can comprise: notice receiving element 601 and processing unit 602.
Wherein, notice receiving element 601 is used to receive the data transmission notice that sends from the RLC entity.
Preferably, described notice receiving element also is used to receive the PDCP service data unit SDU from high level; Wherein, this high level can be the application layer in the User Interface.
Shown in the dotted line among Fig. 6, this PDCP entity also can comprise: the buffer unit 603 and second converter unit 604.
Wherein, buffer unit 603 is used to store the PDCP SDU that notice receiving element 601 receives.
Preferably, described data transmission notice comprises the pairing PDCPPDU information of RLC PDU that the RLC entity sends, and wherein, described PDCP PDU information comprises the pairing serial number of PDCP PDU.
Described processing unit can comprise: obtain subelement 6021 and handle subelement 6022.
Wherein, obtain subelement 6021 and be used for obtaining the pairing PDCP PDU of the RLC PDU information that this data transmission notice comprises.
Preferably, shown in the dotted line among Fig. 6, this PDCP entity further can comprise: creating unit 605, control unit 606 and timer 607.
Wherein, creating unit 605 is used for when not having the timer of the PDCP SDU correspondence that notice receiving element 601 receives, creating the PDCP SDU to receiving current.
When control unit 606 is stored PDCP SDU at described buffer unit, start the timer of this PDCP SDU correspondence of creating unit 605 establishments, before described notice receiving element receives data transmission notice, whether the timer that real-time judge starts does not surpass the time that presets, if, after notice receiving element 601 receives data transmission notice, the operation that subelement 6021 obtains the pairing PDCP PDU of RLC PDU of the transmission that comprises in this data transmission notice is obtained in triggering, and control this timer 60 and stop, otherwise, send processing and be notified to described processing subelement.
By above description as can be seen, in data processing method provided by the invention, device, RLC entity and the PDCP entity, after will sending from the data of PDCP entity by RLC, send data transmission notice to described PDCP; Described PDCP receives this data transmission notice, searches corresponding data according to this data transmission notice in self data in buffer, and the data that find of deletion.Because RLC will be after will sending from the data of PDCP, in time send data transmission notice to described PDCP, like this, than prior art, can guarantee that PDCP knows that in time RLC sends data conditions, and then realize that PDCP sends data conditions according to the RLC of knowing, in time deletes the corresponding data of self storing, save the memory space of PDCP, improve the memory source utilance of PDCP.
Such as, after if PDCP receives PDCP SDU from high level, form PDCP PDU immediately and send to RLC, the very fast again composition of RLC RLC PDU sends the used time and is total up to 50ms, and abandon the time span that timer pre-sets is 1500ms, so, suppose that current business is a high speed business, its speed is 9Mbps, in 1s, will receive the business of 9Mbits so, if PDCP can send this business datum very soon, if adopt the method for prior art, then the memory capacity of PDCP needs＞the 1M byte at least, if adopt the present invention, PDCP knows that in time the data transmission situation of RLC adjusts the cache information of PDCP SDU, PDCP so, and the buffer memory capacity that is specially the PDCP entity can be reduced to about the 9Mbits*50ms=56K byte.As seen, the present invention can save PDCP greatly with respect to prior art, is specially the memory space of PDCP entity, improves the memory source utilance of PDCP entity, and this also is more prone to the situation that base station side is handled a plurality of UE simultaneously.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (13)
1. a data processing method is characterized in that, this method comprises:
Radio Link control RLC will send data transmission notice to described PDCP after will sending from the data of PDCP PDCP;
Described PDCP receives this data transmission notice, searches corresponding data according to this data transmission notice in self data in buffer, and the data that find of deletion.
2. method according to claim 1 is characterized in that, before described RLC will send from the data of PDCP, further comprises:
The PDCP service data unit SDU that the PDCP buffer memory receives is transformed into corresponding PDCP protocol Data Unit PDU with this PDCP SDU, sends this PDCP PDU to RLC;
Described RLC will send from the data among the PDCP and comprise:
RLC receives this PDCP PDU, and this PDCP PDU is transformed into corresponding RLC PDU;
RLC sends described RLC PDU.
3. method according to claim 2 is characterized in that, described data transmission notice comprises the pairing all PDCP PDU information of RLC PDU of the current transmission of RLC, and wherein, described PDCP PDU information comprises the pairing serial number of PDCP PDU;
Described PDCP searches corresponding data according to data transmission notice in self data in buffer:
PDCP obtains the pairing all PDCP PDU information of the RLC PDU that comprises in this data transmission notice;
PDCP is according to the pairing serial number of PDCP PDU that comprises in this PDCP PDU information, searches corresponding PDCP SDU in the PDCP SDU of self buffer memory.
4. method according to claim 2 is characterized in that, if the mode of operation of RLC is an affirmation mode, described RLC sends data transmission notice and comprises to described PDCP:
RLC judges whether the RLC PDU of current transmission is successfully received by the opposite end, if then send described data transmission notice to described PDCP.
5. method according to claim 2, it is characterized in that, the operation of the PDCPSDU that described PDCP buffer memory receives further comprises: if the current timer that does not have the PDCP SDU correspondence of this reception, then create and start timer to the PDCP SDU that should receive;
PDCP is before receiving this data transmission notice, further comprise: whether the timer that real-time judge starts does not surpass the time that presets, if, after receiving data transmission notice, carry out described operation of in self data in buffer, searching corresponding data according to data transmission notice, and stop this timer, otherwise, the PDCP SDU of this overtime timer correspondence directly deleted.
6. a data processing equipment is characterized in that, this device comprises: RLC entity and PDCP entity, wherein,
Described RLC entity will send data transmission notice to described PDCP entity after will sending from the data of PDCP entity;
Described PDCP entity receives this data transmission notice, searches corresponding data according to this data transmission notice in self data in buffer, and the data that find of deletion.
7. a RLC entity is characterized in that, this RLC entity comprises: Data Receiving unit and transmitting element; Wherein,
Described Data Receiving unit is used to receive the data from the PDCP entity;
Described transmitting element is used to send the data that described Data Receiving unit receives, and after sending these data, sends data transmission notice to described PDCP entity.
8. RLC entity according to claim 7 is characterized in that, described Data Receiving unit receives the PDCP PDU from described PDCP entity; Described RLC entity further comprises: first converter unit; Wherein,
Described first converter unit is used for the PDCP PDU that described Data Receiving unit receives is transformed into corresponding RLC PDU;
Described transmitting element sends described RLC PDU.
9. RLC entity according to claim 8 is characterized in that, if the work at present pattern is an affirmation mode, then described RLC entity further comprises: judging unit; Wherein,
Described judging unit is used to judge whether the RLC PDU of current transmission is successfully received by the opposite end, if then send and successfully be notified to described transmitting element;
Described transmitting element sends data transmission notice to described PDCP entity after receiving and successfully notifying, and wherein, described data transmission notice comprises the pairing PDCP PDU of the RLC PDU information of current transmission.
10. a PDCP entity is characterized in that, this PDCP entity comprises: notice receiving element and processing unit; Wherein,
Described notice receiving element is used to receive the data transmission notice that sends from the RLC entity;
Described processing unit is used for searching corresponding data according to this data transmission notice in self data in buffer, and the data that find of deletion.
11. PDCP entity according to claim 10 is characterized in that, described notice receiving element also is used to receive the PDCP service data unit SDU from high level; Described PDCP entity also comprises: the buffer unit and second converter unit; Wherein,
Described buffer unit is used to store the PDCP SDU that described notice receiving element receives;
Described second converter unit is used for the PDCP SDU that described notice receiving element receives is transformed into corresponding PDCP protocol Data Unit PDU, sends this PDCP PDU to the RLC entity.
12. PDCP entity according to claim 11 is characterized in that, described data transmission notice comprises the pairing PDCP PDU of the RLC PDU information that the RLC entity sends, and wherein, described PDCPPDU information comprises the pairing serial number of PDCP PDU;
Described processing unit comprises: obtain subelement and handle subelement; Wherein,
The described subelement that obtains is used for obtaining the pairing PDCP PDU of the RLC PDU information that this data transmission notice comprises;
Described processing subelement is searched all corresponding PDCP SDU according to the described pairing serial number of PDCP PDU that comprises in the PDCP PDU information that subelement obtains that obtains in the PDCP SDU of described buffer unit storage, and the PDCP SDU that finds of deletion.
13. PDCP entity according to claim 11 is characterized in that, described PDCP entity further comprises: creating unit, control unit and timer; Wherein,
Described creating unit is used for when not having the timer of the PDCP SDU correspondence that described notice receiving element receives, creating the PDCP SDU to receiving current;
When described control unit is stored PDCP SDU at described buffer unit, start the timer that described creating unit is created, before described notice receiving element receives data transmission notice, whether the timer that real-time judge starts does not surpass the time that presets, if, after described notice receiving element receives data transmission notice, trigger the described operation that subelement obtains the pairing PDCP PDU of RLC PDU of the transmission that comprises in this data transmission notice of obtaining, and control this timer and stop, otherwise, send processing and be notified to described processing subelement;
Described processing subelement is directly deleted the PDCP SDU of this overtime timer correspondence.
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