CN101119173A - Coding-decoding method for third layer message of time-division synchronous CDMA system - Google Patents
Coding-decoding method for third layer message of time-division synchronous CDMA system Download PDFInfo
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- CN101119173A CN101119173A CNA2007101211438A CN200710121143A CN101119173A CN 101119173 A CN101119173 A CN 101119173A CN A2007101211438 A CNA2007101211438 A CN A2007101211438A CN 200710121143 A CN200710121143 A CN 200710121143A CN 101119173 A CN101119173 A CN 101119173A
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Abstract
The prevent invention relates to a coding and decoding method for the information of the time division synchronous code multiplex access system layer. The method comprises the steps as follows: 1 read the information definition and store the information structure in the read information definition and corresponding member cell structure; 2 confirm the corresponding information structure format and member cell structure format of each stored information structure and each member cell structure and store the confirmed results to a file; 3. confirm the corresponding coding and decoding plan of each piece of information according to the information structure format and the member cell structure format; and 4 conduct coding and decoding operations to the specific information by making use of the coding and decoding plan. The coding and decoding method for the information of the time division synchronous code multiplex access system layer of the present invention can create uniform and standardized information structure formats and member cell structure formats as well as uniform and standardized information coding and decoding plans, being beneficial to the maintenances and upgrades of systems, and is applicable to the newly defined information classes.
Description
Technical field
The present invention relates to the coding and decoding technical field of message in the communication system, particularly relate to a kind of decoding method of third layer message of time-division synchronous CDMA system.
Background technology
In TD SDMA (TD-SCDMA, the Time Division-Synchronization CodeDivision Multiple Access) system, wave point is divided into three layers, is respectively: layer one physical layer, layer two data link layer and layer three network layer.Wherein, layer three comprises Radio Resource control (RRC, RadioResource Control) sublayer such as layer, be responsible for RRC establishment of connection, maintenance and release, radio bearer between broadcasting, user's set and the wireless access network of system message foundation, reconfigure and functions such as release and wireless resource allocation.Thus, in the TD-SCDMA functional entity, need to transmit various types of message and finish these functions.Message transmitted generally need compile between each functional entity becomes the code stream form, transmits then.
Because the message of TD-SCDMA system layer three is of a great variety, its length, structure etc. all there are differences, and are hard works so various types of message are carried out encoding and decoding.In the prior art,, all be by manually finishing at concrete News Category for the setting work of the coding and decoding method of TD-SCDMA system layer three message.That is: manually according to the message of certain particular type, preestablish a kind of decoding method, TD-SCDMA system layer three functional entitys carry out encoding and decoding according to predefined decoding method to concrete message then.But the decoding method of this TD-SCDMA system layer three message does not have standardization, setting work is heavy and can influence system maintenance and upgrade job.
The structure of TD-SCDMA system layer three message has been made definition in 3GPP TS 24.007 and 24.008, wherein, comprise a plurality of member's cells in the structure of TD-SCDMA system layer three message, each member's cell has parameters such as identifier, cell title, classification/reference items, existing way indicated value, sign/length/value territory (TLV, Tag Length Value) form indicated value and length mark.Wherein, identifier can be default; The existing way indicated value comprises essential, optional and optional three types of condition, shows that respectively this member's cell is essential cell, optional cell and the optional cell of condition; TLV form indicated value comprises types such as V, TV, LV, TLV and T, identifies this member's cell respectively and comprises codomain, sign and codomain, length and codomain, sign and contents such as length and codomain, sign; The length mark parameter list understand this member's cell the maximum length that can comprise.
Generally, concrete TD-SCDMA system layer three message are made up of a plurality of member's cells, and these member's cells are limited by above-mentioned parameter.So, for every kind of message, all follow certain queueing discipline in fact, for these TD-SCDMA system layer three message of following certain queueing discipline, there is not a kind of unified decoding method, just adopt at concrete News Category, by manually finishing the mode that decoding method is set, obviously be a kind of work of repeatability, wasted human cost, and caused the difficulty of system maintenance upgrade job.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of decoding method of TD-SCDMA system layer three message, can avoid in the prior art at concrete message improving the maintainability of system by artificial setting coding and decoding method thereby do not have the problem of standardization.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of decoding method of third layer message of time-division synchronous CDMA system, this method may further comprise the steps: read message definition, message structure and its member's cell structure in the message definition read in storage; To each message structure and the member's cell structure of being stored, determine corresponding message structure form and member's cell structure form, and determined message and member's cell structure form are stored hereof; According to message structure form and member's cell structure form, determine the coding and decoding scheme of each message correspondence; Utilize determined message coding and decoding scheme, concrete message is carried out encoding and decoding.
Wherein, described message structure and member's cell structure are with the form storage of root message structure chained list and member's cell structure chained list.
Wherein, in the described message structure chained list, each message structure storage address internal memory is placed with information such as message name, member's cell number and member's cell first address;
In described member's cell structure chained list, each member's cell structure storage address internal memory is placed with information such as cell name, cell identifier, cell existing way indicated value, source identity/length/value territory form indicated value and cell codomain length mark.
Described message structure form and member's cell structure form are message structure body and member's cell structure body.
And described message structure body comprises one or above cell variable; Described member's cell structure body definition comprises source identity, cell length and three variablees of cell codomain.
Wherein, described message definition comes from the message definition file.
In the decoding method of third layer message of time-division synchronous CDMA system of the present invention, described coding method to concrete message is: give message structure form and member's cell structure form with concrete message assignment, according to member's cell order, the message structure form after the assignment and member's cell structure form are encoded to code stream then;
Described coding/decoding method to concrete message is: with code stream in proper order according to the cell of storing in message structure and the member's cell structure, and the architecture of message structure form and member's cell, assignment is given message and member's cell structure form, generates concrete message.
Wherein, the described step that message structure form after the assignment and member's cell structure form are encoded to code stream comprises: if the code stream figure place behind member's cell content encoding is eight integral multiple, then member's cell content is copied to the space of storage code stream according to the mode of byte, if the code stream figure place behind member's cell content encoding is not eight integral multiple, then member's cell content is copied to the space of storage code stream according to the mode of position.
Wherein, the described step that message structure form after the assignment and member's cell structure form are encoded to code stream also comprises: if member's cell is optional cell, then, select whether replica member cell content is to the space of storing code stream according to its existing way indicated value; If member's cell is essential cell, then with the content replication of member's cell to the space of storing code stream.
Wherein, the described step that message structure form after the assignment and member's cell structure form are encoded to code stream also comprises: according to the sign/length/value territory form indicated value of member's cell, select one in source identity, cell length and the cell codomain or the multinomial space that is copied to the storage code stream.
The decoding method of TD-SCDMA system layer three message that the present invention proposes, all TD-SCDMA system layer three message are generated message structure form and member's cell structure form of unified standard, and the message coding and decoding scheme of the unified standard of employing, TD-SCDMA system layer three functional entitys only need according to concrete message content message architecture and member's cell structure form to be carried out assignment, the coding-decoding operation that uses the message coding and decoding scheme of unifying standard to carry out message gets final product then, easy to use, reduced complexity and the cost realized.In addition, the decoding method of TD-SCDMA system layer three message of the present invention is not set the form of certain message in advance, therefore helps the maintenance and the upgrading of system, has more standardization and maintainability, can be suitable for the News Category of redetermination yet.
Description of drawings
Fig. 1 is the decoding method flow chart of TD-SCDMA system layer three message among the present invention.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
As shown in Figure 1, TD-SCDMA system layer three message of the present invention, the decoding method that is called for short layer three message may further comprise the steps:
Step 101: read message definition, message structure and the member's cell structure thereof in the message definition read in storage.
The definition of message can come from the message definition file of stipulating in the agreement, also can come from concrete program setting, as long as the structure of message is deferred to the regulation in 3GPP TS 24.007 and 24.008.
After message definition is read in message definition file or other position, the message structure in the reading message definition and member's cell structure are stored, store data structure can have various ways, as: with chain sheet form, array form, formation form etc.
To adopt storage of linked list is example, the address of depositing all layers three message structure is organized according to linked list format, wherein, specific region at every kind of layer three message structure storage address, for example first 8 bytes, deposit the previous message structure storage address and the back message structure storage address that are positioned at this message in the chained list, such as, the storage address of last message structure and second message structure deposited in preceding 8 bytes of first message of storage; Preceding 8 bytes in second message of storage are deposited the storage address of first message structure and the 3rd message structure, by that analogy.Thus, all message structure storage addresses constitute a root message structure chained list, store information such as message name, member's cell number and member's cell first address in the storage area of each message structure storage address.
To each the member's cell in concrete certain kind of message, also the address of depositing its structure can be organized according to linked list format, wherein, specific region at every kind of member's cell structure storage address, for example first 8 bytes, deposit the previous member's cell structure storage address and the back member's cell structure storage address that are positioned at this member's cell in the chained list, such as, deposit the storage address of last member's cell structure and second member's cell structure in preceding 8 bytes of first member's cell structure of storage; Preceding 8 bytes at second member's cell of storage are deposited the storage address of first member's cell structure and the 3rd member's cell structure, by that analogy.Thus, all the member's cell structure storage addresses in this message have constituted member's cell structure chained list.In described member's cell structure chained list, in the storage area of each member's cell structure storage address, store information such as cell name, cell identifier, cell existing way indicated value, source identity/length/value territory form indicated value and cell codomain length mark.
Like this, by message structure chained list and member's cell structure chained list, preserved the content of various layer three message definition in the message definition file.
Step 102: to each message structure and the member's cell structure of being stored, determine corresponding message structure form and member's cell structure form, and the message and the member's cell structure form that are generated are stored hereof.
At each node in the root message structure chained list, also be layer three message of each particular type, determine its corresponding message structure form respectively, this architecture can be represented according to the definition of structure or class.With the structure is example, and in described structure definition, this structure comprises one or more member's cell variablees according to member's cell number and the sequencing determined in the message structure of storing in the step 101 and the member's cell structure.For example, comprise member's cell variable b of category-B type, member's cell variable c of C type and member's cell variable d of D type in order to a message A.
Each the member's cell that is comprised at each layer 3 message, determine corresponding member's cell structure form, this architecture can be represented according to the definition of structure or class, with the structure is example, in described structure definition, this structure definition is made up of three variablees, is respectively source identity, cell length and cell codomain.In order to save memory space, can be byte BYTE type with source identity and cell length variable-definition.To cell codomain variable, define respectively according to the upper limit of codomain length: when length of field on duty was less than or equal to a byte, cell codomain variable was with the definition of BYTE byte; When length of field on duty was less than or equal to two bytes, cell codomain variable defined with double byte WORD; When length of field on duty was less than or equal to four bytes, cell codomain variable defined with nybble DWORD; Length of field on duty is during greater than four bytes, and cell codomain variable is with byte BYTE array define, and member's number of this array is the upper limit of cell codomain length.For example: member's cell of the category-B type that comprises among the message A, comprise source identity variable b1, cell length variable b2 and cell codomain variable b3, wherein, variable b1 and b2 are the BYTE types, and the type of variable b3 is decided by the cell codomain length mark field in member's cell structure chained list.
After determining architecture, determined message structure form and member's cell structure form are stored hereof together, this document can exist with the form of header file, conveniently calls and inquires about.
Step 103:, determine the coding and decoding scheme of each message correspondence according to message structure form and member's cell structure form.
Here, described coding and decoding scheme is actual is meant the sequence of operations of the time being carried out in coding or decoding.Accordingly, described definite coding and decoding scheme is meant: in when coding, according to the architecture of correspondence the message structure entity is encoded to the code stream form, just this architecture is copied to the space of depositing code stream; In when decoding, the code stream form of message is decoded as corresponding message structure entity, just the code stream reduction is become message.Described message structure entity when being meant the determined coding and decoding scheme of concrete this step of application, utilizes the content of concrete message, and the form of message structure described in the step 102 is carried out assignment and the example that obtains.
Coding and decoding scheme for concrete message, one embodiment of the present of invention are: the encoding scheme of described concrete message is, give message structure form and member's cell structure form with concrete message assignment, then according to storage member's cell order, the message structure form after the assignment and member's cell structure form are encoded to code stream.
The decoding scheme of described concrete message is, with code stream in proper order according to the cell of storing in the message structure of storing and the member's cell structure, and the architecture of message structure form and member's cell, assignment is given message and member's cell structure form, generates concrete message.
Wherein, the described step that message structure form after the assignment and member's cell format are encoded to code stream comprises, if the code stream figure place behind member's cell content encoding is eight integral multiple, then member's cell content is copied to the space of storage code stream according to the mode of byte, if the code stream figure place behind member's cell content encoding is not eight integral multiple, then member's cell content is copied to the space of storage code stream according to the mode of position.All member's cells to a message are finished encoding operation, have promptly finished the encoding operation of this message.By bit manipulation rather than round and be byte manipulation, can conserve storage, improve code efficiency.
For dissimilar member's cells, different code encoding/decoding modes is arranged, for example: if member's cell is optional cell, then according to the existing way indicated value, select whether replica member cell content is to the space of storing code stream, for example member's cell existing way indicated value indicates this member's cell originally specifically not existing in message, does not then need to duplicate the content of this member's cell to the space of storing code stream; If member's cell is essential cell, then with the content replication of member's cell to the space of storing code stream.
In addition, for member's cell with different TLV form indicated values, different code encoding/decoding modes is also arranged, and its method is the sign/length/value territory form indicated value according to member's cell, selects one in source identity, cell length and the cell codomain or the multinomial space that is copied to the storage code stream.Wherein, if TLV form indicated value is V, promptly this member's cell only comprises the codomain field, then according to member's cell length variate-value, with this cell codomain content replication to the space of storing code stream; If TLV form indicated value is TV, promptly this member's cell only comprises sign and codomain field, then this source identity is copied to the space of storing code stream, then according to member's cell length variate-value, with this cell codomain content replication to the space of storing code stream; If TLV form indicated value is LV, promptly this member's cell only comprises length and codomain field, then cell length is copied to the space of storage code stream, for example 8 bit length values, then according to member's cell length variate-value, with this cell codomain content replication to the space of storing code stream; If TLV form indicated value is TLV, promptly this member's cell comprises sign, length and codomain field simultaneously, then source identity and cell length are copied to the space of storage code stream, then according to member's cell length variate-value, with this cell codomain content replication to the space of storing code stream; If TLV form indicated value is T, promptly this member's cell only comprises identification field, then the source identity of this member's cell is copied to the space of storage code stream.
Give an example, message A comprises member's cell of B, C, D type in order, and the attribute of category-B type member cell is: the multiple of essential, TV form, coding back code stream length non-8; The attribute of C type member cell is: optional, TLV form, coding back code stream length are 8 multiple; The attribute of D type member cell is: optional, T form; Then the A message coding scheme obtained of this step is: the source identity of the category-B type member cell determined in the step 102 is copied to the space of storage code stream, and step-by-step is duplicated the cell codomain of category-B type member cell to the space of storing code stream then; Select whether to duplicate the source identity of C type member cell and cell length to the space of storing code stream according to the existing way indicated value of C type member cell, and whether duplicate the cell codomain of C type member cell to the space of storing code stream by byte; Existing way indicated value according to D type member cell selects whether duplicate the source identity of D type member cell to the space of storing code stream.
Step 104: utilize determined message coding and decoding scheme, concrete message is carried out coding-decoding operation.
When concrete message is carried out encoding operation, give message structure form and member's cell structure form with the content assignment of concrete message earlier, become the message structure entity, utilize the message coding and decoding scheme of determining in the step 103 then, this message structure entity is carried out encoding operation; Decode operation is the inverse process of encoding operation, repeats no more herein.
The above is preferred embodiment of the present invention only, is not to be used for limiting protection scope of the present invention.Those skilled in that art should be able to associate; storage mode to layer three message structure and member's cell structure employing different pieces of information structure; take different arranged modes for layer three message structure form with member's cell structure form, and other is equal to accordingly to change or replace and all should belongs to protection scope of the present invention according to technical scheme of the present invention and design thereof.
Claims (10)
1. the decoding method of a third layer message of time-division synchronous CDMA system is characterized in that, this method may further comprise the steps:
A, read message definition, message structure and its member's cell structure in the message definition read in storage;
B, each message structure and member's cell structure to being stored are determined corresponding message structure form and member's cell structure form, and determined message and member's cell structure form are stored hereof;
C, according to message structure form and member's cell structure form, determine the coding and decoding scheme of each message correspondence;
D, utilize determined message coding and decoding scheme, concrete message is carried out encoding and decoding.
2. the decoding method of third layer message of time-division synchronous CDMA system according to claim 1 is characterized in that, described message structure and member's cell structure are with the form storage of root message structure chained list and member's cell structure chained list.
3. the decoding method of third layer message of time-division synchronous CDMA system according to claim 2, it is characterized in that, in the described message structure chained list, each message structure storage address internal memory is placed with information such as message name, member's cell number and member's cell first address;
In described member's cell structure chained list, each member's cell structure storage address internal memory is placed with information such as cell name, cell identifier, cell existing way indicated value, source identity/length/value territory form indicated value and cell codomain length mark.
4. the decoding method of third layer message of time-division synchronous CDMA system according to claim 1 is characterized in that, described message structure form and member's cell structure form are message structure body and member's cell structure body.
5. the decoding method of third layer message of time-division synchronous CDMA system according to claim 4 is characterized in that, described message structure body comprises one or above cell variable; Described member's cell structure body definition comprises source identity, cell length and three variablees of cell codomain.
6. the decoding method of third layer message of time-division synchronous CDMA system according to claim 1 is characterized in that, described message definition comes from the message definition file.
7. the decoding method of third layer message of time-division synchronous CDMA system according to claim 1, it is characterized in that, described coding method to concrete message is: give message structure form and member's cell structure form with concrete message assignment, according to member's cell order, the message structure form after the assignment and member's cell structure form are encoded to code stream then;
Described coding/decoding method to concrete message is: with code stream in proper order according to the cell of storing in message structure and the member's cell structure, and the architecture of message structure form and member's cell, assignment is given message and member's cell structure form, generates concrete message.
8. the decoding method of third layer message of time-division synchronous CDMA system according to claim 7, it is characterized in that, the described step that message structure form after the assignment and member's cell structure form are encoded to code stream comprises: if the code stream figure place behind member's cell content encoding is eight integral multiple, then member's cell content is copied to the space of storage code stream according to the mode of byte, if the code stream figure place behind member's cell content encoding is not eight integral multiple, then member's cell content is copied to the space of storage code stream according to the mode of position.
9. the decoding method of third layer message of time-division synchronous CDMA system according to claim 7, it is characterized in that, the described step that message structure form after the assignment and member's cell structure form are encoded to code stream comprises: if member's cell is optional cell, then, select whether replica member cell content is to the space of storing code stream according to its existing way indicated value; If member's cell is essential cell, then with the content replication of member's cell to the space of storing code stream.
10. the decoding method of third layer message of time-division synchronous CDMA system according to claim 7, it is characterized in that, the described step that message structure form after the assignment and member's cell structure form are encoded to code stream comprises: according to the sign/length/value territory form indicated value of member's cell, select one in source identity, cell length and the cell codomain or the multinomial space that is copied to the storage code stream.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101998510A (en) * | 2009-08-21 | 2011-03-30 | 中兴通讯股份有限公司 | Base station and method for storing system information code stream |
| CN102648596A (en) * | 2009-10-02 | 2012-08-22 | 夏普株式会社 | Devices, methods and computer-readable mediums for coding a control message with determined data code block repetition |
| CN106412990A (en) * | 2015-07-29 | 2017-02-15 | 展讯通信（上海）有限公司 | Terminal protocol stack cell processing method and device |
| CN112867153A (en) * | 2020-12-30 | 2021-05-28 | 中电科仪器仪表(安徽)有限公司 | Method for decoding RRC (radio resource control) message of protocol stack in 5G terminal simulator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100433747C (en) * | 2003-12-16 | 2008-11-12 | 盛万兴 | A high-efficiency electric data transmission coding decoding method |
| CN100450246C (en) * | 2005-03-23 | 2009-01-07 | 华为技术有限公司 | Method for checking transmission channel collocation parameter |
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2007
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101998510A (en) * | 2009-08-21 | 2011-03-30 | 中兴通讯股份有限公司 | Base station and method for storing system information code stream |
| US8964599B2 (en) | 2009-08-21 | 2015-02-24 | Zte Corporation | Base station and method for storing code streams of broadcasting information |
| CN102648596A (en) * | 2009-10-02 | 2012-08-22 | 夏普株式会社 | Devices, methods and computer-readable mediums for coding a control message with determined data code block repetition |
| CN106412990A (en) * | 2015-07-29 | 2017-02-15 | 展讯通信（上海）有限公司 | Terminal protocol stack cell processing method and device |
| CN106412990B (en) * | 2015-07-29 | 2019-08-13 | 展讯通信（上海）有限公司 | Terminal protocol stack cell processing method and processing device |
| CN112867153A (en) * | 2020-12-30 | 2021-05-28 | 中电科仪器仪表(安徽)有限公司 | Method for decoding RRC (radio resource control) message of protocol stack in 5G terminal simulator |
| CN112867153B (en) * | 2020-12-30 | 2023-01-17 | 中电科思仪科技(安徽)有限公司 | Method for decoding RRC (radio resource control) message of protocol stack in 5G terminal simulator |
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