CN1889389A - Method for transmitting business stream according to reliability requirement - Google Patents
Method for transmitting business stream according to reliability requirement Download PDFInfo
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- CN1889389A CN1889389A CN 200510081620 CN200510081620A CN1889389A CN 1889389 A CN1889389 A CN 1889389A CN 200510081620 CN200510081620 CN 200510081620 CN 200510081620 A CN200510081620 A CN 200510081620A CN 1889389 A CN1889389 A CN 1889389A
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Abstract
This invention discloses a method for transmitting service flows based on the demand on reliability, in which, a base station and a terminal transmit service data by a frame and the burst in said frame is used in loading service data, the method includes: a, the base station assigns related code information for each service flow in the terminal and appoints the modulation modes for all service flows of the terminal and burst, b, when the base station and the terminal transmit data messages of the flows, they code and match the rate based on the code information assigned to the service flows by the base station and modulate all data messages got from coding according to the mode assigned in step a then transmit the processed data messages to the opposite end by the burst appointed to said terminal by the base station.
Description
Technical field
The present invention relates to the radio transmission technical field of IEEE 802.16 systems, relate to a kind of method or rather according to the reliability requirement transmitting business stream.
Background technology
IEEE 802.16 protocol definitions the wireless metropolitan area network standard of fixed broadband wireless access (BWA), this standard pin has defined different physical-layer techniques to different frequency range.The range of application of this standard mainly is towards dwelling house, small office/family office (SOHO), teleworker and the user of small enterprise (SME) market.
The frame structure of uplink frame comprises sub-frame of uplink as shown in Figure 1 in IEEE 802.16 agreement time division duplex (TDD) systems, and sub-frame of uplink is made up of a plurality of UL Burst PDU usually.
The frame structure of downlink frame then as shown in Figure 2.This frame structure specifically comprises descending sub frame, comprise in the descending sub frame that being used for terminal realizes the synchronous leading symbol (Preamble) of downlink frame, is used to indicate the code modulation mode of back broadcast part and frame control head (FCH), broadcast and the DL Burst PDU of message-length, and DL Burst PDU is generally more than one.Wherein, comprise downlink map message (DL_MAP) and uplink map message (UL_MAP) in the broadcast, the DL_MAP message definition base station be handed down to the code modulation mode of each burst in the descending sub frame of terminal and distribute to the Radio Resource of each terminal, UL_MAP message has then defined the code modulation mode of each burst in the sub-frame of uplink that terminal sends to the base station and the Radio Resource that each terminal can take.
This shows that employed up and downlink space interface resource is finished in the reciprocal process of up-downgoing business by the base station centralized dispatching, promptly by DL_MAP message and indicating downlink and the up resource allocation respectively of UL_MAP message in terminal and base station.The method of carrying out the interface-free resources distribution by these two kinds of message is identical, is example with UL_MAP distribution of messages ascending idle port resource only below therefore.
UL_MAP_IE in the UL_MAP message is as shown in table 1.UL_MAP message generally includes a plurality of UL_MAP_IE.
| UL-MAP_IE() | |
| { | |
| CID | 16 |
| Start Time | 11 |
| Subchannel Index | 5 |
| UIUC | 4 |
| Duration | 10 |
| Midamble repetition interval | 2 |
| if(UIUC==4) | |
| Focused_Contention_IE() | 16 |
| if(UIUC==13) | |
| Subchannelized_Network_Entry_IE() | 12 |
| if(UIUC==15) | |
| UL_Extended_IE() | v |
| Padding nibble,if needed | 4 |
| } |
Table 1
For the up-link wireless frame, its interface-free resources is divided into a plurality of burst, and each terminal can only use one of them burst, promptly has only the information among the burst relevant with same terminal in every frame.For each burst, all need indicate the shared interface-free resources of this burst, the employed code modulation mode of this burst (UIUC) and the pairing terminal of this burst by a UL_MAP_IE in the UL_MAP message.Therefore, terminal can be determined the burst corresponding with this terminal according to the UL_MAP_IE in the UL_MAP message, and determines position and the employed UIUC of this burst of this burst, can send the corresponding business data by this burst afterwards.
Based on above-mentioned resource allocation mechanism, terminal is when having a plurality of Business Stream, and is as follows by up process to base station transmission information:
The qos requirement of each Business Stream that steps A, base station have according to terminal is determined the scheduling strategy at each Business Stream of this terminal;
Step B, base station calculate the required physical resource of this terminal according to the scheduling strategy of each Business Stream in this terminal, and operable code modulation mode, and indicate to terminal by UL_MAP message;
Step C, terminal be according to the indicated physical resource of UL_MAP message, and according to the qos requirement of each Business Stream in this terminal, these Business Streams are dispatched, promptly in a certain order or alternate manner the data message of these Business Streams is packaged into MAC PDU;
Step D, terminal are cascaded to the MAC PDU of each Business Stream together again, and carry out unified coding and modulation;
Step e, the terminal data message after with coded modulation sends for the interface-free resources that self distributes by the base station.
Under above-mentioned resource assignation mode, the number of the UL_MAP_IE that is comprised in UL_MAP message and the DL_MAP message is identical with the burst number in the ascending-descending subframes, and each terminal has only a burst corresponding with it in frame, therefore the IE number in the message only need equate with the number of terminals of carrying out Business Processing, thereby as can be seen, the IE number in UL_MAP message and the DL_MAP message is less in the present this scheme.Less I E number makes that the shared empty overhead of UL_MAP message and DL_MAP message is also fewer.
But this mode need be carried out unified coding and modulation with the data message of each Business Stream in the same terminal, thereby make the different business stream in the same terminal have identical reliability, and same subterminal different business flow to toward having different reliability requirements.Such as, a terminal has two different business and connects, it is respectively the professional and VoIP business of HTTP, the BER of these two kinds of business requires to be respectively 10^-6 and 10^-3, and because base station assigned up-downgoing resource all is based on terminal, these two the professional data messages that connect that are terminal are launched with same coding and modulation system in same radio frames, therefore guarantee for these two the professional reliabilities that provide same that connect.And, if the base station is when being provided with at the coding of this terminal and modulation system, be to be connected to benchmark with HTTP, then guarantee identical with the professional connection of HTTP for the professional reliability that connects of VoIP, in fact the VoIP business is not high to the requirement of reliability, connects the interface-free resources that identical reliability has been wasted system for it is provided with HTTP.And if the base station is provided with reliability according to the VoIP business, then obviously can't reach the professional reliability requirement that connects of HTTP.
In sum, present interface-free resources allocative decision obviously can't satisfy the different requirements of Business Streams different under the same terminal to reliability.
Summary of the invention
In view of this, subject matter to be solved by this invention is to provide a kind of method according to the reliability requirement transmitting business stream, so that the Business Stream in the terminal can transmit according to reliability.
For addressing the above problem, the invention provides following technical scheme:
A kind of method according to the reliability requirement transmitting business stream, base station and terminal are by the frame service data transmission, and the interface-free resources district burst in the described frame is used for the bearer service data, and this method may further comprise the steps:
A. the base station is each traffic flow assignment corresponding coding information in the terminal, and specifies the modulation system and the burst of all Business Streams in this terminal for this terminal;
B. base station and terminal are when the data message of transmitting business stream, encode and rate-matched for the coded message of this traffic flow assignment by the base station, and all data messages that coding obtains are modulated according to the modulation system of distributing among the step a, the data message after will handling again afterwards sends to the opposite end by the base station for the burst of this terminal appointment.
Among the described step a, described base station is that each the traffic flow assignment corresponding coding information in the terminal is: the base station is the identical coded message of traffic flow assignment that has uniform reliability in the same terminal.
This method further comprises: increase the sign that is used for identification service stream and employed coded message in the MAP_IE of MAP message;
Among the step a, described base station be the traffic flow assignment corresponding coding information, and for after terminal distribution modulation system and the burst, further comprise: selected coded message and corresponding business stream information are set in MAP_IE, and in this MAP_IE, be set to the burst information and the modulation system of this terminal distribution, send to terminal by MAP message afterwards.
Among the described step a, described base station is that each the traffic flow assignment corresponding coding information in the terminal is: the service dispatching type that every kind of Business Stream belonged in the terminal is determined in the base station, and is that every kind of service dispatching type is distributed corresponding coding information;
Among the step b, described is that the coded message of traffic flow assignment is encoded and rate-matched is by the base station: by the base station is that the coded message that service dispatching type that Business Stream belonged to is distributed is encoded and rate-matched.
This method further comprises: increase the sign that is used for identification service scheduling type and employed coded message in the MAP_IE of MAP message;
Among the step a, described base station be the traffic flow assignment corresponding coding information, and for after terminal distribution modulation system and the burst, further comprise: selected coded message and corresponding business scheduling type information are set in MAP_IE, and in this MAP_IE, be set to the burst and the modulation system of this terminal distribution, send to terminal by MAP message afterwards.
Described allocated code information comprises: determine transmission block size, check length, rate matching attribute, code rate and coded system that Business Stream adopts;
This method further comprises: the index that coded message is set;
Among the step a, describedly selected coded message is set in MAP_IE is: the index of coded message.
Among the described step a, described base station is that each traffic flow assignment corresponding coding information is in the terminal: set up in the process at Business Stream, consult to determine by DSA_REQ/RSP message between base station and the terminal.
Among the described step a, described base station is that each traffic flow assignment corresponding coding information is in the terminal: when needs upgrade coded message, determine the new coded message of Business Stream between base station and the terminal by DSC_REQ/RSP message.
Described base station is after the modulation system and burst of all Business Streams in this terminal of this terminal distribution, further comprises: be set to the burst and the modulation system of this terminal distribution in the MAP_IE of MAP message, send to terminal by MAP message afterwards.
Among the described step a, described allocated code information is: determine transmission block size, check length, rate matching attribute, code rate and coded system that Business Stream adopts.
The present invention program is each traffic flow assignment corresponding coding information in the terminal by the base station, make the base station can carry out encoding process according to respective coding mode and code rate for different Business Streams with terminal room, again all Business Streams are modulated and sent afterwards, thereby provide different reliabilities for different Business Streams.
Among the present invention program, the base station is that each the traffic flow assignment corresponding coding information in the terminal can realize by DL_MAP message and UL_MAP message; Also can set up in the process in business, by determining by the DSA_REQ/RSP interacting message between base station and the terminal, further, when needs upgrade coded message, can also be by determining new coded message by the DSC_REQ/RSP interacting message between base station and the terminal.
Description of drawings
Fig. 1 is the structural representation of present sub-frame of uplink;
Fig. 2 is the structural representation of present descending sub frame;
Fig. 3 is a flow chart of realizing the Business Stream transmission among the present invention program.
Embodiment
The present invention program distributes different coded messages for the different business in the same terminal, and be the modulation system and the burst of all Business Streams in this terminal of this terminal distribution, afterwards between base station and terminal during data message transmission, encode and rate-matched for the coded message of this traffic flow assignment by the base station, and all data messages that coding obtains are modulated, the data message after will modulating again sends to the opposite end by the base station for the burst of this terminal distribution.
The present invention program is when being traffic flow assignment coded message in the terminal, can be directly to be coded message of each traffic flow assignment, also can be coded message of traffic flow assignment, can also be the coded message of traffic flow assignment that belongs to same service dispatching type for having uniform reliability.
MAP message can be passed through in base station among the present invention program, and promptly DL_MAP message and UL_MAP message send to terminal with coded message, modulation intelligence and the burst that is distributed.Like this, if come allocated code information according to Business Stream, then need increase the sign that is used for identification service stream and employed coded message in the MAP_IE of MAP message, this sign specifically can be made up of sign, Business Stream number and the coded message of Business Stream.Because coded message is more, comprise transmission block size, check length, rate matching attribute, code rate and coded system etc. that Business Stream adopts, therefore, for simplicity, can set in advance the index of coded message, and corresponding index value is set in MAP_IE.In addition, in the set different coding information, can only require the code rate difference, or the coded system difference, can certainly require the two all different.
With UL_MAP_IE is example, and the UL_MAP_IE that increases after this sign is as shown in table 2.
| UL-MAP_IE() | |
| { | |
| Basic CID | 16bit |
| Start Time | 11bit |
| Subchannel Index | 5bit |
| UIUC | 4bit |
| Number_Record | |
| { | |
| SFID | 32bit |
| Coding Inaex | 6bit |
| } | |
| Duration | 10bit |
| Midamble repetition interval | 2bit |
| if(UIUC==4) | |
| Focused_Contention_IE() | 16bit |
| if(UIUC==13) | |
| Subchannelized_Network_Entry_IE() | 12bit |
| if(UIUC==15) | |
| UL_Extended_IE() | v |
| Padding nibble,if needed | 4 |
| } |
Table 2
Based on the UL_MAP_IE shown in the table 2, the present invention program can indicate the employed modulation system of this terminal by the UIUC among this IE, be designated as the burst of this terminal distribution by information such as the Start Time among this IE, Subchannel Index, and come identification service stream and employed coded message by Number_Record, SFID and CodingIndex.Wherein, identify the number of the Business Stream that is transmitted among the current burst, identify each Business Stream, be designated the index of the coded message of this traffic flow assignment by Coding Index by SFID by Number_Record.
For scheme according to the traffic flow assignment coded message, can also be for having the identical coded message of different business flow distribution of uniform reliability, this just need identify all Business Streams that use same-code information by above-mentioned SFID.
For the scheme of coming allocated code information according to the service dispatching type, with similar according to the scheme of traffic flow assignment coded message, different is, here except need in MAP_IE, increasing the sign of coded message, also need in this MAP_IE, increase the indication information that is used for the identification service scheduling type.
Scheme for sign Business Stream and coded message in MAP_IE, the relation of a plurality of Business Streams and corresponding encoded information can be set by Number_Record, SFID and Coding Index in MAP_IE, can be all Business Streams assignment corresponding coding information respectively in the terminal by MAP_IE.
The present invention can also adopt alternate manner to determine this coded message, such as, can set up in the process at Business Stream, by consulting to determine by DSA_REQ/RSP message between base station and the terminal.For this processing of determining code modulation mode through consultation, if, can also upgrade by DSC_REQ/RSP message because of current channel circumstance changes the information that needs to upgrade in the cataloged procedure.Certainly, the base station also needs the message by MAP for the burst and the modulation system of this terminal distribution, and promptly UL_MAP message and DL_MAP message send to terminal.Wherein, because the coded message of each Business Stream, information such as the data block size, check length, rate matching attribute, code rate and the coded system that are promptly adopted are all determined through consultation, therefore do not need UL_MAP message and DL_MAP message additionally to transmit other any information, promptly UL_MAP and DL_MAP message do not need to do any change.
Based on above-mentioned setting, between terminal among the present invention program and the base station process of the data message of transmitting business stream as shown in Figure 3, corresponding following steps:
Wherein, the coded message of each Business Stream can be determined according to the reliability requirement of channel information and Business Stream, and coded message generally includes the information such as transmission block size, check length, rate matching attribute, code rate and coded system that Business Stream adopts.
Carry out the transmission of the data message of Business Stream according to the coded message of being distributed, burst and modulation system between step 303, terminal and the base station.
In this step, this transmission can be that terminal sends datagram to the base station on up direction, also can be that the base station sends datagram to terminal on down direction.If terminal sends datagram, then the terminal burst that need distribute for self according to the base station and the qos requirement of each Business Stream are dispatched, and the data message of each Business Stream of being scheduled is packaged into corresponding M AC PDU; Terminal is carried out partition packetization respectively with the MAC PDU of each Business Stream again, and according to encoding and rate-matched for the coded message of this traffic flow assignment; Terminal will encode again and rate-matched after data message be cascaded to together, carry out mapping of unified planisphere and OFDM modulation, the data message after will handling afterwards is that the burst of this terminal distribution sends by the base station.The base station then can be according to going up reception information and carry out the demodulating and decoding processing from corresponding burst from the relevant information as each traffic flow assignment, to obtain corresponding data message.
If the base station sends datagram, then performed processing and the above-mentioned processing in base station is similar, therefore repeats no more.For terminal, then need at first to determine that according to the Basic CID among the DL_MAP_IE of DL_MAP message whether information among the corresponding burst is for sending to this terminal information, if, then basis is the modulation system of this terminal distribution, and comes that for the coded message of each traffic flow assignment the information among the burst is carried out demodulating and decoding and handle.
The above only is the present invention program's preferred embodiment, not in order to limit protection scope of the present invention.
Claims (10)
1, a kind of method according to the reliability requirement transmitting business stream, base station and terminal are by the frame service data transmission, and the interface-free resources district burst in the described frame is used for the bearer service data, it is characterized in that this method may further comprise the steps:
A. the base station is each traffic flow assignment corresponding coding information in the terminal, and specifies the modulation system and the burst of all Business Streams in this terminal for this terminal;
B. base station and terminal are when the data message of transmitting business stream, encode and rate-matched for the coded message of this traffic flow assignment by the base station, and all data messages that coding obtains are modulated according to the modulation system of distributing among the step a, the data message after will handling again afterwards sends to the opposite end by the base station for the burst of this terminal appointment.
2, method according to claim 1 is characterized in that among the described step a, and described base station is that each the traffic flow assignment corresponding coding information in the terminal is: the base station is the identical coded message of traffic flow assignment that has uniform reliability in the same terminal.
3, method according to claim 1 and 2 is characterized in that, this method further comprises: increase the sign that is used for identification service stream and employed coded message in the MAP_IE of MAP message;
Among the step a, described base station be the traffic flow assignment corresponding coding information, and for after terminal distribution modulation system and the burst, further comprise: selected coded message and corresponding business stream information are set in MAP_IE, and in this MAP_IE, be set to the burst information and the modulation system of this terminal distribution, send to terminal by MAP message afterwards.
4, method according to claim 1, it is characterized in that among the described step a, described base station is that each the traffic flow assignment corresponding coding information in the terminal is: the service dispatching type that every kind of Business Stream belonged in the terminal is determined in the base station, and is that every kind of service dispatching type is distributed corresponding coding information;
Among the step b, described is that the coded message of traffic flow assignment is encoded and rate-matched is by the base station: by the base station is that the coded message that service dispatching type that Business Stream belonged to is distributed is encoded and rate-matched.
5, method according to claim 4 is characterized in that, this method further comprises: increase the sign that is used for identification service scheduling type and employed coded message in the MAP_IE of MAP message;
Among the step a, described base station be the traffic flow assignment corresponding coding information, and for after terminal distribution modulation system and the burst, further comprise: selected coded message and corresponding business scheduling type information are set in MAP_IE, and in this MAP_IE, be set to the burst and the modulation system of this terminal distribution, send to terminal by MAP message afterwards.
According to claim 3 or 5 described methods, it is characterized in that 6, described allocated code information comprises: determine transmission block size, check length, rate matching attribute, code rate and coded system that Business Stream adopts;
This method further comprises: the index that coded message is set;
Among the step a, describedly selected coded message is set in MAP_IE is: the index of coded message.
7, method according to claim 1 is characterized in that among the described step a, and described base station is that each traffic flow assignment corresponding coding information is in the terminal: set up in the process at Business Stream, consult to determine by DSA_REQ/RSP message between base station and the terminal.
8, method according to claim 7, it is characterized in that among the described step a, described base station is that each traffic flow assignment corresponding coding information is in the terminal: when needs upgrade coded message, determine the new coded message of Business Stream between base station and the terminal by DSC_REQ/RSP message.
9, according to claim 7 or 8 described methods, it is characterized in that, described base station is after the modulation system and burst of all Business Streams in this terminal of this terminal distribution, further comprise: in the MAP_IE of MAP message, be set to the burst and the modulation system of this terminal distribution, send to terminal by MAP message afterwards.
According to claim 1,7 or 8 described methods, it is characterized in that among the described step a that 10, described allocated code information is: determine transmission block size, check length, rate matching attribute, code rate and coded system that Business Stream adopts.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015161475A1 (en) * | 2014-04-24 | 2015-10-29 | Intel IP Corporation | Connection identifier for high-efficiency wireless networks |
| CN107607581A (en) * | 2017-09-30 | 2018-01-19 | 桂林电子科技大学 | It is a kind of based on differential scanning calorimetry to the stability of LED components and the detection method of reliability |
-
2005
- 2005-06-30 CN CNB2005100816203A patent/CN100550690C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015161475A1 (en) * | 2014-04-24 | 2015-10-29 | Intel IP Corporation | Connection identifier for high-efficiency wireless networks |
| TWI577224B (en) * | 2014-04-24 | 2017-04-01 | 英特爾Ｉｐ公司 | Connection identifier for high-efficiency wireless networks |
| CN107607581A (en) * | 2017-09-30 | 2018-01-19 | 桂林电子科技大学 | It is a kind of based on differential scanning calorimetry to the stability of LED components and the detection method of reliability |
| CN107607581B (en) * | 2017-09-30 | 2019-09-20 | 桂林电子科技大学 | It is a kind of based on differential scanning calorimetry to the stability of LED component and the detection method of reliability |
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| CN100550690C (en) | 2009-10-14 |
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