CN100569022C - A kind of method of transmitting managing and controlling message - Google Patents
A kind of method of transmitting managing and controlling message Download PDFInfo
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- CN100569022C CN100569022C CNB2004100904572A CN200410090457A CN100569022C CN 100569022 C CN100569022 C CN 100569022C CN B2004100904572 A CNB2004100904572 A CN B2004100904572A CN 200410090457 A CN200410090457 A CN 200410090457A CN 100569022 C CN100569022 C CN 100569022C
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Abstract
The invention discloses a kind of method of transmitting managing and controlling message, this method at first is cascaded to the pairing protocol Data Unit PDU of the management control messages that issues simultaneously among the same physical slot by time burst by base station BS to be transmitted, and in being handed down to the message of terminal, indicate this physics burst, and the current terminal that needs the receiving management control messages.The invention solves the resource overhead problem that prior art is brought when by distribution unicast management control messages being sent to terminal.The present invention program has reduced DL_MAP message for distributing the shared interface-free resources of unicast, and improved the speed that BS sends management control messages, also just improved the speed of terminal receiving management control messages, thereby accelerated the whole access speed of system, and do not need system is done any setting, implement very simple and convenient.
Description
Technical field
The present invention relates to the management control messages interaction technique in IEEE 802.16 systems, relate to a kind of method of transmitting managing and controlling message or rather.
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, and its range of application mainly is towards dwelling house, small office/family office (SOHO), teleworker, and SME market.
In IEEE 802.16 systems, media access control layer (MAC) can be supported very disadvantageous user environment, can deal with the applied environment that has hundreds and thousands of users on each channel, supports different traffic carrying capacitys such as continous way and burst type.It also has ATM convergence sub-layer and grouping convergence sub-layer, a Medium Access Control (MAC) Protocol Data Unit (MAC PDU) transmission can be handled and be packaged in a plurality of high level datas unit through convergence sub-layer, thereby can realize protocol transparency processing ATM, IP and Ethernet service.
As seen from the above description, the system based on IEEE 802.16 agreements has good application prospects.
In the scheme that IEEE 802.16 agreements provide, want to realize the normal transmission of air interface between terminal and the base station, need mutual between a lot of management control messages.Such as, required parameter adjustment during the terminal initial connecting system just needs reply realizing alternately between (RNG_RSP) message by searching request (RNG_REQ) message and search.And for certain specific process, often need could guarantee alternately several times the enforcement of this process, search (Ranging) process and scanning (SCAN) process etc. are not always the case.
For the Ranging process, in IEEE 802.16 systems, terminal at first will send the request that inserts at random to the base station in Random Access Channel when initial the access, and this inserts request at random can be to insert request code at random or insert request message etc. at random; Power, Timing Advance and frequency departure then can be asked to measure according to the access at random that receives in the base station, and give terminal by corresponding message with measurement feedback.Obviously, in Random Access Channel, the base station may receive a plurality of users' the request of access at random simultaneously in the channel of a radio frames.Mechanism according to IEEE 802.16 systems, successfully receive the request of access at random of terminal in the base station after, the base station can connect (unicast) chance for this terminal provides clean culture, in other words conj.or perhaps this terminal is added the polling list polling table of base station, afterwards again by finishing follow-up ranging process alternately.
In addition, do not finish in terminal before the login process of network, or terminal is in during dormancy (Sleep), idle (IDLE) pattern, having a series of management control messages between terminal and the BS equally needs mutual.
In these cases, often do not have special business to connect between terminal and the BS, do not have special service flow in other words conj.or perhaps, that is to say, can't be between terminal and the BS by the professional transmitting managing and controlling message that connects.For finishing the mutual of management control messages between terminal and BS, BS need shine upon the special unicast resource of terminal arrangement that needs transmitting managing and controlling message in (DL_MAP) message for each at down channel, to manage the transmission of control messages by this unicast resource.Certainly, for the existing professional terminal that connects, also can specify the unicast resource that is used for the receiving management control messages separately for this terminal.
And according to the up-to-date agreement IEEE 802.16-Revd/D5 of IEEE 802.16 as can be known, whenever be that a terminal is arranged a unicast chance, just meaning to increase a special IE in DL_MAP message.From the described DL_MAP_IE of table 1, as can be seen, whenever be that a terminal increases a unicast chance, then will bring the expense of 36bits to DL_MAP message.
Table 1
Obviously, if need the terminal number that adds very many in the system, then present this processing mode can increase huge empty overhead to system.
In addition, when terminal just began connecting system, often not having a lot of message needed alternately, therefore, specifies respectively to be specifically designed to for each terminal to send the resource overhead that message has increased system.
Summary of the invention
In view of this, subject matter to be solved by this invention is to provide a kind of method of transmitting managing and controlling message, with when management control messages is transmitted, reduces the empty overhead of BS.
For addressing the above problem, technical scheme of the present invention is achieved in that a kind of method of transmitting managing and controlling message, this method comprises: base station BS is cascaded to the pairing protocol Data Unit PDU of the management control messages that issues simultaneously among the same physical slot by time burst and transmits, and in being handed down to the message of terminal, indicate this physics burst, and the current terminal that needs the receiving management control messages.
Described BS is cascaded to physics burst with the pairing PDU of management control messages and comprises: each management control messages is formed media access control layer MAC PDU, and with the pairing PDU cascade of each management control messages, the PDU that cascade is obtained is set among the physics burst by the chnnel coding modulation then.
Described BS to the chnnel coding modulation system that PDU adopted that cascade obtains is: the code modulation mode that all terminals can receive; The perhaps code modulation mode of lowest-order in all terminals code modulation mode that can use.
This method further comprises: BS further is provided with the code modulation mode that terminal receiving management control messages is adopted in being handed down to the message of terminal.
Described BS indicates physics burst to be in being handed down to the message of terminal: the down channel that is being handed down to terminal shines upon in the DL_MAP message by information word DL_MAP_IE indication.
Described BS indicates the current terminal of receiving management control messages that needs to be in being handed down to the message of terminal: the DL_MAP_IE that is used for indicating physics burst in the DL_MAP message is arranged on before the CID_SWITCH_IE of connection transitional information unit of DL_MAP message.
Described BS indicates the current terminal of receiving management control messages that needs to be in being handed down to the message of terminal: the DL_MAP_IE that is used for indicating physics burst in the DL_MAP message is arranged on after the CID_SWITCH_IE of DL_MAP message, and the current basic hyphen Basic CID that needs all terminals of receiving management control messages, the CID of perhaps described terminal multicast of living in be set further in described DL_MAP_IE.
Further comprise among the described DL_MAP_IE: the multi-link indication MultipleCID Indication that is used for marking terminal;
Described BS indicates the current terminal of receiving management control messages that needs to be in being handed down to the message of terminal:
Directly receive management control messages among the described physics burst by all terminals of sign that are provided with to described Multiple CID Indication;
Perhaps in DL_MAP_IE, further be provided with: the current Basic CID that needs all terminals of receiving management control messages, the CID of perhaps described terminal multicast of living in, and by to the setting of described MultipleCID Indication, indicating terminal determines self whether to need to receive management control messages among the described physics burst according to the cid information that is provided with among the described DL_MAP_IE.
The present invention program is with respect to being at present the technology that each terminal receiving management control messages is distributed unicast, by BS the pairing PDU of all management control messages that can issue simultaneously is cascaded among the same physics burst, and give terminal by message informing with this physics burst and the current terminal that needs the receiving management control messages, reduced DL_MAP message for distributing the shared interface-free resources of unicast.Particularly when BS needs the management control messages that issues a lot of simultaneously, and terminal is when need be with BS interactive messages amount very little, and this effect is particularly evident.
BS among the present invention program sends by physics burst together by the management control messages that will send to a plurality of terminals, improved the speed of BS transmission management control messages, also just improved the speed that terminal receives management control messages, thereby accelerated the bulk velocity of the process of eating dishes without rice or wine of transmitting managing and controlling message, and accelerated the whole access speed of system greatly.When particularly having a large number of users to initiate handoff request simultaneously in certain BS overlay area, this effect is more outstanding.
The present invention program makes that the CID_SWITCH_IE in the DL_MAP message can delete, thereby has avoided the empty overhead that appearance brought of CID_SWITCH_IE by increase Multiple CID Indication in DL_MAP_IE.
In addition, the present invention program can not do any setting to existing system, implements very simple, convenient.
Embodiment
Can issue simultaneously in view of often having a plurality of management control messages among the BS, therefore, the present invention program is associated in the same physical slot by time (burst) by the pairing protocol Data Unit of management control messages (PDU) level that BS can issue simultaneously, these management control messages are transmitted by this physics burst, and in DL_MAP message, indicate this physics burst and the current terminal that needs the receiving management control messages.
Wherein, by the current terminal that needs the receiving management control messages of DL_MAP message indication the time, if the current terminal amount of receiving management control messages that needs is many, then can in DL_MAP message, indicate terminal by broadcasting hyphen (Broadcast CID) or multicast hyphen (multicast CID); If fewer, then can in DL_MAP message, list current all need receive the CID of the terminal of the management control messages among this physics burst.
In addition, BS is cascaded to the pairing PDU of management control messages among the physics burst, specifically can be at first each management control messages to be formed MAC PDU, then with the pairing PDU cascade of these management control messages, and the PDU that cascade obtains carried out processing such as chnnel coding modulation in physical layer, thereby the pairing PDU of management control messages is cascaded among the physics burst.
Because BS need carry out the chnnel coding modulation in physical layer, for making the terminal can be to the management control messages reception of decoding, can encode by the chnnel coding modulation that BS uses all terminals to receive, such as, the code modulation mode that uses current DL_MAP message to be adopted is encoded, perhaps use the code modulation mode of lowest-order in the code modulation mode that all terminals can both use to encode, and directly be identified for the code modulation mode of receiving management control messages by terminal.Certainly, also can be in DL_MAP message indicating terminal receive the code modulation mode of this management control messages.
By such setting, terminal is after receiving the DL_MAP message that BS sends, can according to DL_MAP message determine self whether needs receive management control messages among the indicated physics burst of this DL_MAP message, and can determine to receive the employed code modulation mode of this management control messages.Terminal is when receiving concrete management control messages, and owing to the identification information that carries terminal among the pairing PDU of each management control messages, so terminal can determine whether receive this management control messages according to this identification information.
In conjunction with specific embodiments the present invention program is described in further detail again below.
For the more situation of terminal amount, specifically can the pairing MAC PDU of management control messages of all transmission of can putting together be cascaded among the physics burst by BS, and resulting physics burst before indicating in DL_MAP message by BS, sign multicast CID in DL_MAP message.
BS in DL_MAP message, done these be provided with and specifically can be arranged among the DL_MAP_IE, the form of this IE is identical with common IE form.
After being provided with this IE, at sign multicast CID in DL_MAP message, specifically can be this IE is placed on DL_MAP message connection transitional information unit (CID_SWITCH_IE) before.Just to have implied the indicated burst of this IE itself before the CID_SWTICH_IE be Broadcast because IE is placed on, therefore terminal is after receiving DL_MAP message, just can be according to being arranged on CID_SWITCH_IE IE before, determine that the management control messages among the indicated physics burst of this IE is a broadcast, determine self need receive message among this physics burst with this.
Based on the existing message format of IEEE 802.16 agreements, the form of the DL_MAP_IE that present embodiment is set is as shown in table 2.
| { | |
| DIUC (DIUC≠15) | 4bits |
| OFDMA Symbol offset | 8bits |
| Subchannel offset | 6bits |
| Boosting | 3bits |
| No.OFDMA Symbols | 7bits |
| No.Subchannels | 6bits |
| Repetition Coding Indication | 2bits |
| } |
Table 2
Though still need the interface-free resources of 36bit among the DL_MAP_IE of table 2, but this DL_MAP_IE is at a plurality of management control messages, that is to say, the interface-free resources of this 36bit is simultaneously at a plurality of terminals, therefore, this programme compared with prior art can be saved a lot of interface-free resources, when the terminal amount that needs the receiving management control messages was very big, this effect was more obvious.
At the terminal CID that multicast is set in DL_MAP message, can also be the Multicast CID that in this IE, is provided with at multicast, and this IE is arranged on after the CID_SWITCH_IE.Like this, terminal is after receiving DL_MAP message, and whether can determine according to the Multicast CID among this IE self should be in the indicated physics burst resource-area receiving management control messages of this IE.
For the less situation of terminal amount, identical with said process, BS is provided with a DL_MAP_IE in DL_MAP message, identify set information with this IE.Different with said process is, owing to need the terminal of receiving management control messages less, therefore can be in DL_MAP message the CID of all terminals be identified out, that is to say, in set IE, list the Basic CID of all terminals that relate to, and this IE is arranged on after the CID_SWITCH_IE.
Like this, when the indicated physics Burst resource-area of this DL_MAP_IE arrives, each terminal just can know the scope whether information among the indicated physics Burst of this IE to one's name should receive according to the DL_MAP message that receives, thereby avoided the reception to management control messages in the indicated physics burst zone of this IE of all terminals.
Based on the existing message format of IEEE 802.16 agreements, the IE form that terminal CID is set in DL_MAP_IE is as shown in table 3.
| { | |
| DIUC | 4bits |
| N_CID | 8bits |
| for(n＝0；n＜N_CID；n++) | |
| {CID} | 16bits |
| OFDMA Symbol offset | 8bits |
| Subchannel offset | 6bits |
| Boosting | 3bits |
| No.OFDMA Symbols | 7bits |
| No.Subchannels | 6bits |
| Repetition Coding Indication | 2bits |
| } |
Table 3
In addition, at the situation that DL_MAP_IE is set in DL_MAP message, can also make amendment to this DL_MAP_IE.Certainly, the modification of being done can not have influence on the requirement of protocols having to DL_MAP_IE.This modification is specifically as follows: the information be specifically designed to sign CID is set in DL_MAP_IE, therefore, and can be with existing CID_SWITCH_IE deletion in the agreement, the empty overhead that brings when avoiding CID_SWITCH_IE appearance itself.
Amended DL_MAP_IE form is as shown in table 4.
Table 4
As can be seen from Table 4, the modification of being done mainly is to be provided with multi-link indication (Multiple CID Indication) in DL_MAP_IE, and when Multiple CID Indication=0, the CID territory is set to Broadcast CID; And when Multiple CID Indication=1, the Basic CID or the Multicast CID of the terminal that will relate in this IE list, and clearly indicate the data of the indicated physics burst resource-area of this IE should be handed down to which terminal.
The Multiple CID Indication that is increased only needs 1bit, and original CID_SWITCH_IE needs 8bit in the DL_MAP message, obviously, if the IE in the DL_MAP message is less than 8, then the modification of being done economizes on resources than original processing, and the IE in the present DL_MAP message often is less than 8.
The form of DL_MAP_IE during Multiple CID Indication=0 is as shown in table 5; The form of DL_MAP_IE during Multiple CID Indication=1 is as shown in table 6.
Table 5
| { | |
| DIUC (DIUC≠15) | 4bits |
| Multiple CID Indication＝1 | 1bit |
| if(Multiple CID Indication＝＝1) | |
| { | |
| N_CID | 8bits |
| for(n＝0；n＜N_CID；n++) | |
| {CID} | 16bits |
| } | |
| OFDMA Symbol offset | 8bits |
| Subchannel offset | 6bits |
| Boosting | 3bits |
| No.OFDMA Symbols | 7bits |
| No.Subchannels | 6bits |
| Repetition Coding Indication | 2bits |
| } |
Table 6
The above only is the present invention program's preferred embodiment, not in order to limit protection scope of the present invention.
Claims (8)
1, a kind of method of transmitting managing and controlling message, it is characterized in that, this method comprises: base station BS is cascaded to the pairing protocol Data Unit PDU of a plurality of management control messages at a plurality of terminals that issues simultaneously among the same physical slot by time burst and transmits, and in being handed down to the message of terminal, indicate this physical slot by time burst, and the current terminal that needs the receiving management control messages.
2, method according to claim 1, it is characterized in that, described BS is cascaded to physical slot by time burst with the pairing PDU of management control messages and comprises: each management control messages is formed media access control layer MAC PDU, and with the pairing PDU cascade of each management control messages, the PDU that cascade is obtained is set among the physical slot by time burst by the chnnel coding modulation then.
3, method according to claim 2 is characterized in that, described BS to the chnnel coding modulation system that PDU adopted that cascade obtains is: the code modulation mode that all terminals can receive; The perhaps code modulation mode of lowest-order in all terminals code modulation mode that can use.
4, method according to claim 2 is characterized in that, this method further comprises: BS further is provided with the code modulation mode that terminal receiving management control messages is adopted in being handed down to the message of terminal.
According to claim 1,2,3 or 4 described methods, it is characterized in that 5, described BS indicates physical slot by time burst to be in being handed down to the message of terminal: the down channel that is being handed down to terminal shines upon in the DL_MAP message by information word DL_MAP_IE indication.
6, method according to claim 5, it is characterized in that described BS indicates the current terminal of receiving management control messages that needs to be in being handed down to the message of terminal: the DL_MAP_IE that is used for indicating physical slot by time burst in the DL_MAP message is arranged on before the CID_SWITCH_IE of connection transitional information unit of DL_MAP message.
7, method according to claim 5, it is characterized in that, described BS indicates the current terminal of receiving management control messages that needs to be in being handed down to the message of terminal: the DL_MAP_IE that is used for indicating physical slot by time burst in the DL_MAP message is arranged on after the CID_SWITCH_IE of DL_MAP message, and the current basic hyphen Basic CID that needs all terminals of receiving management control messages, the CID of perhaps described terminal multicast of living in be set further in described DL_MAP_IE.
8, method according to claim 5 is characterized in that, further comprises among the described DL_MAP_IE: the multi-link indication Multiple CID Indication that is used for marking terminal;
Described BS indicates the current terminal of receiving management control messages that needs to be in being handed down to the message of terminal:
Directly receive management control messages among the described physical slot by time burst by all terminals of sign that are provided with to described Multiple CID Indication;
Perhaps in DL_MAP_IE, further be provided with: the current Basic CID that needs all terminals of receiving management control messages, the CID of perhaps described terminal multicast of living in, and by to the setting of described Multiple CIDIndication, indicating terminal determines self whether to need to receive management control messages among the described physical slot by time burst according to the cid information that is provided with among the described DL_MAP_IE.
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| CNB2004100904572A CN100569022C (en) | 2004-11-18 | 2004-11-18 | A kind of method of transmitting managing and controlling message |
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| CNB2004100904572A CN100569022C (en) | 2004-11-18 | 2004-11-18 | A kind of method of transmitting managing and controlling message |
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| CN1780464A CN1780464A (en) | 2006-05-31 |
| CN100569022C true CN100569022C (en) | 2009-12-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8204033B2 (en) * | 2007-04-23 | 2012-06-19 | Institute For Information Industry | Relay station, base station, relay method, transmission method, and computer readable medium thereof for use in a multi-hop network |
| CN101867882B (en) * | 2009-04-14 | 2015-10-21 | 中兴通讯股份有限公司 | Message sends and message feedback preprocess method |
| US8520542B2 (en) | 2010-02-12 | 2013-08-27 | Mediatek Inc. | Uplink power control message design in wireless OFDMA systems |
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