CN1964276A - WiMax communication system and method - Google Patents

Abstract

The related WiMax communication system comprises: a UE to send information to a BS by its MAC, and a BS to respond the notified MAC and send the response information to UE.

Description

WiMax communication system and communication means

Technical field

The present invention relates to a kind of WiMax communication system and communication means.

Background technology

IEEE 802 has worked out different standards in wireless domain at the different market demands and application model, as is applied to IEEE 802.11 standards of WLAN (wireless local area network).802.16 of IEEE are for working out the working group that wireless MAN (Wireless MAN) standard is set up, this working group after setting up in 1999, the main air-interface standard of being responsible for fixed wireless access, since the 802.16e task groups establishment of supporting mobility and after much WiMAX joins in main flow equipment manufacturers, IEEE 802.16 has attracted increasing sight.

The main task of IEEE 802.16 is, development also has uniformity test relevant with air interface protocol and the coexistence standard between the different radio connecting system simultaneously in the wireless access system air interface physical layer (PHY) and medium access control layer (MAC) standard of 2～66GHz frequency band.

The wireless system of IEEE 802.16 regulations is mainly used in metropolitan area network.

According to whether supporting mobility, IEEE 802.16 standards can be divided into fixed broadband wireless and insert air-interface standard and mobile broadband wireless access air-interface standard, wherein 802.16,802.16a, 802.16d belong to the fixed wireless access air-interface standard, and 802.16e belongs to mobile broadband wireless and inserts aerial standard, corresponding research state such as table 1.

Air-interface standard	Frequency range	State
			IEEE 802.16	Fixed broadband wireless access system air-interface standard (10～66GHz)	2002.04 issue
IEEE 802.16a	Fixed broadband wireless access system air-interface standard (2～11GHz)	2003.04 issue
			IEEE 802.16c	The compatibility (10～66GHz) of fixed broadband wireless access system	2002 issues

IEEE 802.16d	Fixed broadband wireless inserts air-interface standard (2～66GHz) (to the revisions of 802.16/802.16a/802.16c)	Pass in IEEE 802 committees in June, 2004, issues with IEEE 802.16-2004 title.
			IEEE 802.t6e	Support fixing and ambulant broadband wireless access air-interface standard (2～6GHz)	Finish in 2005.

Table 1 IEEE 802.16 air interface relevant criterion

Since 802.16d be basically to 802.16, the revision of 802.16a and 802.16c, therefore can think that present 802.16 comprise two main flow air-interface standard: 802.16d and 802.16e, be respectively fixing and move design.

In 802.16 standard, the air interface of the protocol stack model of its standard is made up of physical layer and MAC layer, the MAC layer has been divided into three sublayers again: special services convergence sub-layer (Service SpecificConvergence Sublayer, the CS sublayer), common part sublayer (Common Part Sublayer, CPS sublayer), Security Sublayer (Privacy Sublayer).

The central role of CS sublayer is to upper layer data classification with to the compression in data packet header.

The CPS sublayer is the core sublayer of MAC, and it mainly finishes service flow management, the distribution of bandwidth and scheduling, QOS etc.

The effect of Security Sublayer is to the data encryption and decryption, so that safe transfer of data to be provided.

802.16MAC layer is based on " connections ", i.e. all terminal data service and the qos requirement of being correlated with therewith are based on all that " connection " carry out.Each " connection " comes unique the sign by an identifier (CID).In 802.16 standards, the MAC layer has defined comparatively complete QoS mechanism.The MAC layer can be provided with different qos parameters respectively at each connection, comprises indexs such as speed, time-delay.

Existing 802.16 standard has been specified a large amount of type of messages for the MAC administrative message, it is mutual with the link layer information of BS (base station) that these MAC administrative messags are undertaken SS/MSS (subscriber/mobile subscriber), and the function of its interactive information comprises initialization, range finding, registration, cipher key change, mobile switching, capability negotiation, allocated bandwidth, multicast, antenna adjustment, dynamic service configuration or the like.

The employed connection of these MAC administrative messages mainly contains basic connection (basic connection), and primary management connects (primary management connection), and broadcasting connects (broadcastconnection).

At present, SS/MSS is some specific type of messages to the approach that BS initiatively carries out the link layer message announcement, the content of being announced also is relatively fixing, and the effectively general or extendible link layer announcement of neither one type satisfies other message announcement, as fault/warning information etc.

Therefore, SS/MSS initiatively carries out message announcement to BS and communicates more than just need rising to the IP layer, when if the communication of IP layer is undesired, SS/MSS just can't be effective information such as fault/information notification BS such as alarm, may come advertised information with regard to the approach that needs other so, even may need artificial collection in worksite fault message etc., therefore increase operation cost, reduce efficient, caused degradation unfavorable factor under the customer satisfaction.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of WiMax communication system and method based on the MAC layer, wherein SS/MSS utilizes the MAC administrative message initiatively to announce its relevant information to BS.

Comprise a user terminal and a base station according to WiMax communication system of the present invention, user terminal passes through the MAC notice message with its information informing base station; This MAC notice message of described base station in response sends to user terminal with the MAC response message.

According to the communication means that is used for the WiMax communication system of the present invention, comprising: step 1. user terminal passes through the MAC notice message with its information informing base station; And step 2. this MAC notice message of described base station in response sends to user terminal with the MAC response message.

According to the present invention, by increasing MAC administrative message type and using these administrative messages, SS/MSS can initiatively announce its relevant information to BS, fault/warning information for example, need not initiate just to feed back these information after the inquiry by BS, in time relevant information is offered operator, so just can provide more effective information than original scheme so as to pinpoint the problems as early as possible, problem analysis, solution and queueing problem and for guaranteeing network security, effectively, operation provides more assurance reliably.Based on the network device management of IP agreement and control fairly perfectly, but not necessarily be fit to for the terminal of some low costs, low-power consumption, therefore use the MAC layer to carry out the scheme of network device management, for these destination objects have reasonable using value.Also a kind of auxiliary or spare communication means are provided to the network equipment that upper-layer protocol can be provided.

Description of drawings

The flow chart of Fig. 1 for communicating by letter between SS/MSS and the BS.

Fig. 2 sends the flow chart of NTF_IE_REQ message to BS once more for SS/MSS after time-out time.

Embodiment

In the present invention, at first in the existing MAC administrative messag, increase MAC administrative message type as shown in table 1:

Type	Message name	Message semantic definition	Connect
				206	NTF_IE_REQ	Announcement IE request	Primary management connects
207	NTF_IE_RSP	Announcement IE response	Primary management connects

The MAC administrative message that table 1 increases

According to the MAC administrative message as table 1 definition, as shown in Figure 1, SS/MSS11 regularly or under predetermined condition (for example breaking down) triggers initiatively sends NTF_IE_REQ message to BS12, with its relevant information (for example, warning information) notice BS12.BS12 receives after this NTF_IE_REQ message, handles accordingly according to the type of message, for example definite response state etc.BS12 replys NTF_IE_REQ message according to situation about handling, and replys SS/MSS11 with the form transmission NTF_IE_RSP message of MAC administrative message.

Below, NTF_IE_REQ message and NTF_IE_RSP message are described in detail.

Announcement IE request (Notify IE Request, NTF_IE_REQ)

SS/MSS11 uses one or more IE of NTF_IE_REQ message bearing, notifies the relevant information of equipment or the network of the relevant SS/MSS11 of BS12, and the particular content of these information is described by IE.NTF_IE_REQ message is initiated by SS/MSS11, connects by main management to send to BS12.

The message format of NTF_IE_REQ has been described in the table 2.

Grammer	Size	Mark
			NTF_IE_REQ_Message_Format() {
Management message type＝206	8 bits
			Transaction id	8 bits
Response indication	8 bits	Admissible value: 0-does not need to respond 1-and needs response
			Response timeout	8 bits	With 5 hardwoods is unit
TLV Encoded Information	Variable
			}

The message format of table 2 NTF_IE_REQ

In NTF_IE_REQ message, the implication of each parameter is as follows:

Management message type is the management message type value, is set at 206 herein;

Transaction id is a session identification, is discerned the identifier number of this conversation procedure by session initiator (SS/MSS11) being used to of producing;

Response indication is provided with by session initiator (SS/MSS) for the response sign, and whether be used to specify this message needs the BS response;

Response timeout is a response timeout, is unit with 5 frame times, if this message needs response (Response indication is set to 1) and SS/MSS11 not to receive feedback message NTF_IE_RSP in this overtime scope, can retransmit;

The information that TLV (type length value, type lengths values) Encoded Information is comprised is variable, and is different and different according to the information of the required notice of this NTF_IE_REQ message, for example can comprise authentication information, warning information etc.For example, comprise Fault List TLV (error listing TLV) information as shown in table 3:

Type	Length	Value
			Fault List TLV	Variable	Constitute by sub-attribute

Table 3 Fault List TLV

The content of Fault List TLV attribute can comprise type as shown in table 4.

Type	Length	Value
			Fault ID	2 bits	The ID that a corresponding failure condition is described
Fault type	1 bit	0: the communication alarm; 1: handle fault alarm; 2: the environment alarm; The 3:Qos alarm; 4: equipment alarm.
			The fault severity level	1 bit	0: fatal error 1: gross error 2: common wrong 3: warning 4: do not determine 5: remove
...	...	...

Table 4 Fault List TLV attribute

In addition, TLV Encoded Information need comprise authentication information HMAC Tuple (please provide its Chinese), and HMAC Tuple must appear at TLV Encoded Information last.The parameter of HMAC Tuple comprises HMAC Ciphering Key Sequence Number and HMAC summary.The HMAC Ciphering Key Sequence Number is at low 4 bits of first byte of HMAC Tuple, and the HMAC summary takies 160 bits behind the Ciphering Key Sequence Number, and concrete form, algorithm are identical with HMACTuple in other the MAC administrative message.

Announcement IE response (Notify IE Response, NTF_IE_RSP)

The NTF_IE_REQ information that BS12 uses NTF_IE_RSP message to reply SS/MSS11, NTF_IE_RSP message are sent to SS/MSS11 by main management connection by BS12.

The message format of NTF_IE_RSP has been described in the table 5.

Grammer	Size	Mark
			NTF_IE_RSP_Message_Format() {
Management message type＝207	8 bits
			Transaction id	8 bits
RSP Status	8 bits	The TLV of the too short 2-mistake of admissible value: 0-success 1-time-out time
			TLV Encoded Information	Variable
}

The message format of table 5 NTF_IE_RSP

In NTF_IE_RSP message, the implication of each parameter is as follows:

Management message type is the management message type value, is set at 207 herein;

Transaction id is a session identification, is discerned the identifier number of this conversation procedure by session initiator (SS/MSS 11) being used to of producing;

RSP Status is a response status, for example, can utilize 0 to represent successfully; 1 expression time-out time is too short; The wrong TLV of 2 expressions.

The information that TLV Encoded Information is comprised is variable, and is different and different according to the required loaded information of this NTF_IE_RSP, for example can comprise authentication information etc.

In addition, TLV Encoded Information need comprise authentication information HMAC Tuple, and HMAC Tuple must appear at TLV Encoded Information last.The parameter of HMAC Tuple comprises HMAC Ciphering Key Sequence Number and HMAC summary.The HMAC Ciphering Key Sequence Number is at low 4 bits of first byte of HMACTuple, and the HMAC summary takies 160 bits behind the Ciphering Key Sequence Number, and concrete form, algorithm are identical with HMAC Tuple in other the MAC administrative message.

As shown in Figure 2, if SS/MSS 11 does not receive the NTF_IE_RSP message from BS 12 in time-out time, then it can send NTF_IE_REQ message once more to BS12 after overtime.

In addition, if BS12 receives a plurality of message that reported by the MAC administrative message by SS/MSS11 in time-out time, BS12 can only make up-to-date message and replying.

The defined MAC type of message of table 1 only is an example.Among this MAC, types value may adopt other value to replace, and for example 208,209 etc.; Message name may adopt other message name to replace; Message semantic definition may adopt other message semantic definition to replace; Connect type of message and may adopt other type for example to replace, secondary management connects (secondary management connection).

In addition, in the response status of NTF_IE_RSP message, can utilize a return code (n) to notify SS/MSS11 to stop to send notice.For example, response status can be defined as follows: 0 represents successfully; 1 expression time-out time is too short; The wrong TLV of 2 expressions; N represents to forbid announcement.In addition, also the represented meaning of each symbol in the response status can be put upside down, for example response status can be defined as follows: 0 represents successfully; The wrong TLV of 1 expression; 2 expression time-out times are too short.

In addition, in NTF_IE_REQ message and NTF_IE_RSP message, the size of each field can change 4 bits, 6 bits or 1 byte etc. into, and it is unit that time-out time also can be revised with 6 frames etc.

According to the present invention,,, form the message intercommunication mechanism of fairly perfect SS/MSS and BS in conjunction with the MAC administrative message of BS active inquiry SS/MSS by the link layer approach of newly-increased SS/MSS active reporting message to BS.

Claims (12)

1. a WiMax communication system comprises a user terminal and a base station, wherein,

User terminal passes through the MAC notice message with its information informing base station; This MAC notice message of described base station in response sends to user terminal with the MAC response message.

2. communication system as claimed in claim 1, wherein,

Described MAC notice message or MAC response message connect by main management or the secondary management connection sends.

3. communication system as claimed in claim 1, wherein,

Described MAC notice message comprises management message type, session identification, the relevant information of response timeout information and user terminal.

4. communication system as claimed in claim 3, wherein,

The relevant information of user terminal comprises error listing TLV, and this error listing TLV comprises fault ID, fault type, and fault severity level.

5. communication system as claimed in claim 1, wherein,

Described MAC response message comprises management message type, session identification, response status, and relevant information.

6. communication system as claimed in claim 5, wherein,

Response status in the MAC response message is: success, time-out time is too short, the TLV of mistake, any in forbidding announcing.

7. communication means that is used for the WiMax communication system, it comprises:

Step 1. user terminal passes through the MAC notice message with its information informing base station; And

Step 2. this MAC notice message of described base station in response sends to user terminal with the MAC response message.

8. communication means as claimed in claim 7, wherein,

In step 1 and step 2, connect described MAC notice message of transmission or MAC response message by main management connection or secondary management.

9. communication means as claimed in claim 7, wherein,

Described MAC notice message comprises management message type, session identification, the relevant information of response timeout information and user terminal.

10. communication means as claimed in claim 9, wherein,

The relevant information of user terminal comprises error listing TLV, and this error listing TLV comprises fault ID, fault type, and fault severity level.

11. communication means as claimed in claim 7, wherein,

Described MAC response message comprises management message type, session identification, response status, and relevant information.

12. communication means as claimed in claim 11, wherein,

Response status in the MAC response message is: success, time-out time is too short, the TLV of mistake, any in forbidding announcing.

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