CN101815366A - Device, receiving terminal and method for analyzing MAC-ehs PDU - Google Patents
Device, receiving terminal and method for analyzing MAC-ehs PDU Download PDFInfo
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Abstract
The embodiment of the invention discloses a device, a receiving terminal and a method for analyzing MAC-ehs PDU, wherein the device comprises: an acquisition module for acquiring MAC-ehs PDU; an analysis module for analyzing the MAC-ehs PDU as MAC-d PDU; and a storage module for storing the analyzed MAC-d PDU data so that CPU reads the analyzed MAC-d PDU data. According to the invention, the MAC-ehs PDU is subject to analysis by adopting specific device, the analysis result is stored so that CPU can read the result directly, thus analysis delay can be reduced while CPU occupancy of the receiving terminal is lowered and working efficiency of the receiving terminal is enhanced.
Description
Technical field
The present invention relates to communication technique field, the device of particularly a kind of analyzing MAC-ehs PDU, receiving terminal and method.
Background technology
Along with high-speed packet access+(High-Speed Packet Access Plus, hereinafter to be referred as HSPA+) introduced 64 quadrature amplitude modulation (Quadrature Amplitude Modulation in the technology, hereinafter to be referred as QAM) and Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access, hereinafter to be referred as WCDMA), the professional peak rate that can transmit rises to 43.2Mbps in theory, in order to improve the data transmission efficiency of eating dishes without rice or wine, introduced the technical scheme of 2 layers of enhancing (Level2 enhancement).
The receiving terminal of WCDMA, 2 layers of enhancing of every support all need to carry out the parsing work of MAC-ehs PDU to MAC-d PDU.Wherein, MAC-ehs PDU is: medium access control-enhancing high speed protocol data cell (Medium Access Control enhanced high speed Protocol DataUnit, hereinafter to be referred as MAC-ehs PDU), MAC-d PDU is: medium access control-dedicated transmission channel protocol Data Unit (MAC-d Medium Access Dedicated Transport ChannelsProtocol Data Unit is hereinafter to be referred as MAC-d PDU).Resolving is a series of operation, comprising: HARQ (mixing automatic repeat requests), Disassembly (fractionation), Reordering queuedistribution (the heavy distribution sort of formation), Reordering (reordering), Reassemble (re-assemblying) and LCH-ID Demux operations such as (decomposition multiplexes of logic channel length mark).
In the prior art, aforesaid operations is to be finished by the central processing unit of receiving terminal (Central ProcessingUnit is hereinafter to be referred as CPU).CPU disposal ability with receiving terminal is that 133MHz is an example, and the business datum that it handles 21.6Mbps need take CPU at least about time of 3%, and at least about the processing delay of 50ms.When the data of WCDMA business were 43.2Mbps, the time that then needs to take the CPU about 6% of receiving terminal handled.
The inventor finds that in the prior art, the WCDMA business datum amount that receiving terminal is handled needs the MAC-ehs PDU that carries out also more to the parsing work of MAC-d PDU more for a long time, and can take a large amount of resource of CPU this moment, influenced the operating efficiency of receiving terminal.
Summary of the invention
The invention provides device, receiving terminal and the method for a kind of analyzing MAC-ehs PDU, take cpu resource, influence the problem of receiving terminal operating efficiency in order to solve in the prior art MAC-ehs PDU resolved.
The embodiment of the invention provides a kind of device of resolving medium access control-enhancing high speed protocol data cell MAC-ehs PDU, and described device comprises:
Acquisition module is used to obtain MAC-ehs PDU;
Parsing module is used for described MAC-ehs PDU is resolved to medium access control-dedicated transmission channel protocol Data Unit MAC-d PDU;
Memory module is used for the described MAC-d PDU data that storing and resolving goes out, and reads the described MAC-d PDU data that parse for central processor CPU.
The embodiment of the invention also provides a kind of receiving terminal, comprises resolver and central processor CPU;
Described resolver, be used to obtain medium access control-enhancing high speed protocol data cell MAC-ehsPDU, described MAC-ehs PDU is resolved to medium access control-dedicated transmission channel protocol Data Unit MAC-d PDU, and the described MAC-d PDU data that go out of storing and resolving;
Described CPU is used for reading the described MAC-d PDU data that described resolver is stored.
The embodiment of the invention also provides a kind of method of resolving medium access control-enhancing high speed protocol data cell MAC-ehs PDU, comprising:
Obtain MAC-ehs PDU;
Described MAC-ehs PDU is resolved to medium access control-dedicated transmission channel protocol Data Unit MAC-d PDU;
The described MAC-d PDU data that storing and resolving goes out read the described MAC-d PDU data that parse for central processor CPU.
The embodiment of the invention is carried out dissection process by adopting special-purpose device to MAC-ehs PDU, storing and resolving result directly reads for CPU, can reduce the delay of dissection process, reduce the CPU usage of receiving terminal simultaneously, improve the operating efficiency of receiving terminal.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the accompanying drawing of required use is done an introduction simply in will describing embodiment below, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the device of the analyzing MAC-ehs PDU that Fig. 1 a provides for first embodiment of the invention;
The hardware designs figure of the device of the analyzing MAC-ehs PDU that Fig. 1 b provides for first embodiment of the invention;
The data format schematic diagram of the MAC-ehs PDU that Fig. 1 c provides for first embodiment of the invention;
The structural representation of the receiving terminal that Fig. 2 provides for second embodiment of the invention;
The method flow diagram of the analyzing MAC-ehs PDU that Fig. 3 provides for third embodiment of the invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making all other embodiment that obtained under the creative work prerequisite.
The structural representation of the device of a kind of analyzing MAC-ehs PDU that provides for first embodiment of the invention referring to Fig. 1 a, this device can be applicable in the receiving terminal of WCDMA, belong to a device that is independent of outside the CPU that adds in the receiving terminal, be used for MAC-ehs PDU data are resolved, generate the analysis result data of MAC-d PDU, directly read the analysis result result data of MAC-d PDU for CPU, thereby reduce, improve the operating efficiency of receiving terminal the taking of cpu resource.This device comprises: acquisition module 11, parsing module 12 and memory module 13.
Wherein, acquisition module 11 can be made up of a series of decoding unit, be used for the data that the WCDMA receiving terminal receives are converted to MAC-ehs PDU, and send into parsing module 12 and carry out dissection process, memory module 13 can be an analysis result buffer, store M AC-d PDU data directly read use for CPU, and the hardware designs figure of the device of this analyzing MAC-ehs PDU of present embodiment is referring to shown in Fig. 1 b.
In the present embodiment, adopt the mode of parallel parsing, can improve the resolution speed of resolver, reduced delay.This parsing module 12 specifically is used for obtaining each code block of this MAC-ehs PDU, adopts the parallel mode of resolving of many code blocks, and this MAC-ehs PDU is resolved to MAC-d PDU; Memory module 13 specifically is used to adopt parallel mode of storing, and stores these MAC-dPDU data that this parsing module parses, and reads this analysis result data for CPU.
By adopting the parsing that walks abreast of a plurality of code blocks with MAC-ehs PDU bag, analysis result is adopted parallel storage, make the dissection process of this device postpone only to be the transmission delay of MAC-ehs PDU header field, this postpones usually less than 10 milliseconds, postpone to compare with traditional CPU dissection process, significantly saved the time for a few tens of milliseconds.
Referring to Fig. 1 c is the data format schematic diagram of MAC-ehs PDU, and MAC-ehs PDU is made up of MAC-ehs head (packet header) and MAC-ehs payload (load).Whole M AC-ehs PDU is coding and decoding for convenience, can be divided into the code block of one or more coding and decoding, as shown in Fig. 1 c, MAC-ehs PDU is divided for X code block.
The parsing that can walk abreast to the MAC-ehs PDU that is divided into a plurality of code blocks of the device of present embodiment, and the data of each code block that will parse, as Logic Channel Identifier (logic channel identify, hereinafter to be referred as LCH-ID), transmission sequence number (Transaction Serial Number, hereinafter to be referred as TSN), stream identification (Stream Identifier, hereinafter to be referred as SI), Reordering PDU (data cell reorders) and follow-up Reordering service data unit (Service Data Unit, hereinafter to be referred as SDU) etc. data splicing get up, store according to the pairing form of MAC-d PDU, make things convenient for CPU directly to read use.
According to the form of the MAC-ehs PDU shown in Fig. 1 c as can be known, the header field data of MAC-ehs PDU all leave in first code block, when resolving, need be according to this header field information, calculate the source address and the destination address of the Reording PDU correspondence in each code block, wherein, source address is the position of Reording PDU correspondence in MAC-ehs payload, and destination address is the position of Reording PDU correspondence in the analysis result buffer memory.According to source address and destination address, just MAC-ehs PDU can be resolved to MAC-d PDU.
In conjunction with the form of above-mentioned MAC-ehs PDU, and the hardware designs figure of the device of the analyzing MAC-ehs PDU shown in Fig. 1 b, the data that receiving terminal is received are converted to MAC-ehs PDU, and resolve and obtain MAC-d PDU, and its operation principle is as follows:
Earlier will receive data and be converted to MAC-ehs PDU by a plurality of decoding units, a plurality of decoding units adopt the mode of parallel conversion to change receiving data, be converted to the first code block data as the decoding unit one decoding unit 1 responsible data that will receive the data start-up portion, decoding unit 2-decoding unit x will receive the data that follow-up data in the data is converted to the 2nd code block-x code block respectively, and the data of the 1st code block-x code block have just been formed the MAC-ehs PDU after the conversion.
Wherein, the first code block data are different from the data of other code blocks, the header field data of MAC-ehs PDU all leave in first code block, therefore, data in first code block are resolved be different from other code blocks, as shown in 1b among the figure, when resolving first code block, need parse the header field data, and it is left in the header field register.
In addition, referring among the figure shown in the 1b, the device of present embodiment is to resolve according to the mode of many code blocks, need handle respectively data boundary in each code block and non-data boundary, wherein, data boundary is a partial data adjacent in the adjacent code block, and this partial data need adopt the territory Boundary Register to carry out caching process, non-data boundary is non-conterminous data in each code block, and this partial data can adopt payload territory ping-pong buffer to carry out caching process.MAC-d PDU after promptly obtaining resolving after resolution data in header field register, territory Boundary Register and the payload territory ping-pong buffer arranged, and it is stored in the analysis result buffer memory reads for CPU.
By above-mentioned parsing operation principle as can be known, this parsing module 12 comprises: the first code block resolution unit 12a is used for resolving first code block of this MAC-ehs PDU, and extracts the header field data in this first code block.
Be depicted as the storage format of the analysis result in the analysis result buffer memory in the present embodiment referring to table 1.Wherein, rPDU is Reording PDU, and rPDU1 represents the Reording PDU in first code block, and rSDU is Reording SDU.According to the regulation of existing protocol, adopt following form storing and resolving result, can make things convenient for CPU to read, move and operation such as splicing, make CPU can read analysis result fast.
Table 1
In the parsing module 12 of this device, can also comprise respectively: territory Boundary Register, the data that are used to store each code block boundary; And non-territory Boundary Register, the data that are used to store the non-boundary of each code block, non-territory Boundary Register can be payload territory ping-pong buffer.
Get by above-mentioned, in the present embodiment, owing to adopted independent device to parse, can largely reduce the occupancy of CPU, be that 43.2Mbps is an example with the data of WCDMA business, in the prior art, the time that approximately takies CPU6% is carried out dissection process, and in the present embodiment, CPU only needs to read analysis result from buffer, approximately take the time of CPU about 1.5%, improved the operating efficiency of the receiving terminal of WCDMA.
Present embodiment carries out dissection process by the device of design specialized in the receiving terminal of WCDMA, storing and resolving result directly reads for CPU, can reduce the delay of dissection process, reduce the CPU usage of receiving terminal simultaneously, improve the operating efficiency of receiving terminal.
The structural representation of the receiving terminal that provides for second embodiment of the invention referring to Fig. 2, this receiving terminal comprises resolver 21 and CPU22.
Wherein, the 26S Proteasome Structure and Function of the device of the analyzing MAC-ehs PDU among this resolver 21 and first embodiment is identical, is used to obtain MAC-ehs PDU, and this MAC-ehs PDU is resolved to MAC-dPDU, and the storing and resolving result data;
This CPU22 is used for reading these analysis result data of these resolver 21 storages.
In the present embodiment, postpone for reducing dissection process, this resolver 21 comprises:
MAC-ehs PDU is made up of MAC-ehs head and MAC-ehs payload.Whole M AC-ehsPDU is coding and decoding for convenience, can be divided into the code block of one or more coding and decoding.The parsing that can walk abreast to the MAC-ehs PDU that splits into a plurality of code blocks of the resolver of present embodiment, and the data splicing of each code block that will parse are stored according to the pairing form of MAC-d PDU, make things convenient for CPU directly to read use.
According to the form of MAC-ehs PDU as can be known, the header field data of MAC-ehs PDU all leave in first code block, when resolving, need be according to this header field information, calculate the source address and the destination address of the ReordingPDU correspondence in each code block, wherein, source address is the position of Reording PDU correspondence in MAC-ehspayload, and destination address is the position of Reording PDU correspondence in the analysis result buffer memory.According to source address and destination address, just MAC-ehs PDU can be resolved to MAC-d PDU.
This parsing module 12 comprises the first code block resolution unit 12a, is used for resolving first code block of this MAC-ehs PDU, and extracts the header field data in this first code block;
Need to prove,, after need handling respectively the data boundary in each code block and non-data boundary, arrange again and be stored in the analysis result buffer memory because the device of present embodiment is to resolve according to the mode of many code blocks.Wherein, data boundary is a partial data adjacent in the adjacent code block, this partial data need adopt the territory Boundary Register to carry out caching process, and non-data boundary is non-conterminous data in each code block, and this partial data can adopt payload territory ping-pong buffer to carry out caching process.
Therefore, in the resolver 21 of this receiving terminal, also should comprise respectively: territory Boundary Register, the data that are used to store each code block boundary; And non-territory Boundary Register, the data that are used to store the non-boundary of each code block, non-territory Boundary Register can be payload territory ping-pong buffer.
The receiving terminal of present embodiment carries out dissection process by the device of design specialized in the receiving terminal of WCDMA, storing and resolving result directly reads for CPU, can reduce the delay of dissection process, reduce the CPU usage of receiving terminal simultaneously, improve the operating efficiency of receiving terminal.
The method flow diagram of the analyzing MAC-ehs PDU that provides for third embodiment of the invention referring to Fig. 3, the executive agent of present embodiment can be for being independent of a resolver outside the CPU in the WCDMA receiving terminal, and method may further comprise the steps:
In the present embodiment, adopt the mode of parallel conversion to change to receiving data by a plurality of decoding units, each decoding unit is to receiving the data that obtain a code block after data are changed, and a plurality of decoding units have just been formed MAC-ehs PDU to the data that receive a plurality of code blocks after the data transaction.
When analyzing MAC-ehs PDU, also adopt parallel mode of resolving, this MAC-ehs PDU is resolved to MAC-d PDU.Promptly resolve a plurality of code blocks of MAC-ehs PDU are parallel, and the data splicing of each code block that will parse, store according to the pairing form of MAC-d PDU, make things convenient for CPU directly to read use.
Wherein, the first code block data are different from the data of other code blocks, the header field data of MAC-ehs PDU all leave in first code block, therefore, data in first code block are resolved be different from other code blocks, when resolving first code block, need parse the header field data, and it is left in the header field register.The method of resolving is specific as follows: resolve first code block among this MAC-ehs PDU, and extract the header field data in this first code block; According to the header field data in this first code block, calculate source address and the destination address of the ReordingPDU in other code blocks; According to the header field data in this first code block, and source address and the destination address of the Reording PDU in other code blocks of calculating of this address calculation, store the data that reorder in each code block, generate the payload data of MAC-d PDU.
In addition, owing to be to resolve in the resolving according to the parallel mode of many code blocks, therefore need handle respectively data boundary in each code block and non-data boundary, wherein, data boundary is a partial data adjacent in the adjacent code block, this partial data need adopt the territory Boundary Register to carry out caching process, and non-data boundary is non-conterminous data in each code block, and this partial data can adopt payload territory ping-pong buffer to carry out caching process.
Therefore, the data that reorder in each code block of storage when generating the payload data of MAC-d PDU, adopt following method: store the data of each code block boundary and the data of non-boundary respectively; According to the data of each code block boundary of this storage and the data of non-boundary, the data that reorder in each code block are arranged, generate the payload data of MAC-d PDU.The resolution data that is about in header field register, territory Boundary Register and the payload territory ping-pong buffer is arranged the payload data that the back generates MAC-d PDU.
These MAC-d PDU data that step 33, storing and resolving go out read these MAC-d PDU data that parse for CPU.
Owing to when analyzing MAC-ehs PDU, adopted the parallel mode of resolving of many code blocks, can fast MAC-ehs PDU be resolved to MAC-d PDU thus, the MAC-d PDU data that adopt the mode storing and resolving of parallel storage to go out, the MAC-d PDU data that can make CPU directly read to parse.
Present embodiment is by adopting special-purpose device analyzing MAC-ehs PDU, and storing and resolving result directly reads for CPU, can reduce the delay of dissection process, reduces the CPU usage of receiving terminal simultaneously, has improved the operating efficiency of receiving terminal.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, and module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
One of ordinary skill in the art will appreciate that: the module in the device among the embodiment can be described according to embodiment and be distributed in the device of embodiment, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforementioned program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that previous embodiment is put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of embodiment of the invention technical scheme.
Claims (15)
1. device of resolving medium access control-enhancing high speed protocol data cell MAC-ehs PDU is characterized in that described device comprises:
Acquisition module is used to obtain MAC-ehs PDU;
Parsing module is used for described MAC-ehs PDU is resolved to medium access control-dedicated transmission channel protocol Data Unit MAC-d PDU;
Memory module is used for the described MAC-d PDU data that storing and resolving goes out, and reads the described MAC-d PDU data that parse for central processor CPU.
2. device according to claim 1 is characterized in that,
Described parsing module specifically is used for obtaining each code block of described MAC-ehs PDU, adopts the parallel mode of resolving of many code blocks, and described MAC-ehs PDU is resolved to MAC-d PDU.
3. device according to claim 2 is characterized in that, described parsing module comprises:
The first code block resolution unit is used for resolving first code block of described MAC-ehs PDU, and extracts the header field data in described first code block;
Address calculation is used for the header field data according to described first code block, calculates the source address and the destination address of the data cell that reorders in other code blocks;
Arrangement units, be used for header field data according to described first code block, and the source address and the destination address of the data cell that reorders in other code blocks of calculating of described address calculation, the data that reorder in each code block are sent in the memory module, generate the payload data of MAC-d PDU.
4. device according to claim 3 is characterized in that, also comprises:
The territory Boundary Register, the data that are used to store each code block boundary;
Non-territory Boundary Register, the data that are used to store the non-boundary of each code block.
5. device according to claim 1 is characterized in that described acquisition module comprises at least one decoding unit, and described at least one decoding unit will receive data and be converted to MAC-ehs PDU.
6. a receiving terminal is characterized in that, comprises resolver and central processor CPU;
Described resolver, be used to obtain medium access control-enhancing high speed protocol data cell MAC-ehsPDU, described MAC-ehs PDU is resolved to medium access control-dedicated transmission channel protocol Data Unit MAC-d PDU, and the described MAC-d PDU data that go out of storing and resolving;
Described CPU is used for reading the described MAC-d PDU data that described resolver is stored.
7. receiving terminal according to claim 6 is characterized in that, described resolver comprises:
Acquisition module is used to obtain described MAC-ehs PDU;
Parsing module is used for obtaining each code block of described MAC-ehs PDU, adopts the parallel mode of resolving of many code blocks, and described MAC-ehs PDU is resolved to MAC-d PDU;
Memory module is used to adopt parallel mode of storing, and stores the described MAC-d PDU data that described parsing module parses.
8. receiving terminal according to claim 7 is characterized in that, described parsing module comprises:
The first code block resolution unit is used for resolving first code block of described MAC-ehs PDU, and extracts the header field data in described first code block;
Address calculation is used for the header field data according to described first code block, calculates the source address and the destination address of the data cell that reorders in other code blocks;
Arrangement units, be used for header field data according to described first code block, and the source address and the destination address of the data cell that reorders in other code blocks of calculating of described address calculation, the data that reorder in each code block are sent in the memory module, generate the payload data of MAC-d PDU.
9. receiving terminal according to claim 8 is characterized in that, described resolver also comprises:
The territory Boundary Register, the data that are used to store each code block boundary;
Non-territory Boundary Register, the data that are used to store the non-boundary of each code block.
10. receiving terminal according to claim 7 is characterized in that described acquisition module comprises at least one decoding unit, and described at least one decoding unit will receive data and be converted to MAC-ehsPDU.
11. a method of resolving medium access control-enhancing high speed protocol data cell MAC-ehs PDU is characterized in that, comprising:
Obtain MAC-ehs PDU;
Described MAC-ehs PDU is resolved to medium access control-dedicated transmission channel protocol Data Unit MAC-d PDU;
The described MAC-d PDU data that storing and resolving goes out read the described MAC-d PDU data that parse for central processor CPU.
12. method according to claim 11 is characterized in that, it is characterized in that, described MAC-ehs PDU is resolved to MAC-d PDU, comprising:
Obtain each code block among the described MAC-ehs PDU, adopt the parallel mode of resolving of many code blocks, described MAC-ehs PDU is resolved to MAC-d PDU.
13. method according to claim 12 is characterized in that, obtains each code block among the described MAC-ehs PDU, adopts the parallel mode of resolving of many code blocks, and described MAC-ehs PDU is resolved to MAC-d PDU, comprising:
Resolve first code block among the described MAC-ehs PDU, and extract the header field data in described first code block;
According to the header field data in described first code block, calculate the source address and the destination address of the data cell that reorders in other code blocks;
According to the header field data in described first code block, and the source address and the destination address of the data cell that reorders in other code blocks of calculating of described address calculation, store the data that reorder in each code block, generate the payload data of MAC-d PDU.
14. method according to claim 13 is characterized in that, stores the data that reorder in each code block, generates the payload data of MAC-d PDU, comprising:
Store the data of each code block boundary and the data of non-boundary;
According to the data of each code block boundary of described storage and the data of non-boundary, the data that reorder in each code block are arranged, generate the payload data of MAC-d PDU.
15. method according to claim 11 is characterized in that, obtains MAC-ehs PDU, comprising:
To receive data by at least one decoding unit and be converted to MAC-ehs PDU.
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