CN101056240A - A route maintenance method and device between the MESH points - Google Patents
A route maintenance method and device between the MESH points Download PDFInfo
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- CN101056240A CN101056240A CNA2007101075683A CN200710107568A CN101056240A CN 101056240 A CN101056240 A CN 101056240A CN A2007101075683 A CNA2007101075683 A CN A2007101075683A CN 200710107568 A CN200710107568 A CN 200710107568A CN 101056240 A CN101056240 A CN 101056240A
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Abstract
The invention provides a route maintenance method between the MESH points, which is applied in the network including the multiple MESH points, this method includes the following steps: the MESH point broadcasts the notification message to other MESH points which includes the source MESH point address and route information; the MESH points receiving the notification messages determines the optimized route with the MESH point according to the route information. The invention also provides route maintenance system and MESH point between the MESH points. Based on the HWMP protocol, the invention also provides one simple and effective MESH point route learning method, drives and maintains the route learning of the MESH points via the MP ANOUNCEMENT information, so it avoids the route request response process in the HWMP protocol and reduces the transfer delay of the packet.
Description
Technical field
The present invention relates to the radio network technique field, relate in particular to route maintenance method and equipment between the middle MESH point of a kind of MESH (based on wireless mesh network).
Background technology
WLAN (Wireless Local Access Network, WLAN (wireless local area network)) provides a kind of wireless connections service of local area network (LAN), because wireless data access at a high speed can be provided, WLAN is one of relatively more popular technology of present IT industry, also is popular wireless access way.WLAN adopts centralized AC (Access Controller, wireless controller)-AP (Access Point, WAP (wireless access point)) framework usually.AC provides the centralized management of wlan network, and AP then adds wlan network and the wireless access service is provided by setting up link with AC.
Concentrate the WLAN framework that clearly definition is arranged in CAPWAP (Control and Provisioning of Wireless AccessPoints, wireless access point control and regulation) agreement.This protocol description the division of WLAN function on AP equipment and AC equipment, and defined communication protocol between AP and the AC.Communication protocol between AC-AP is at present: seek AC after AP powers on, if AC is interconnected with two layers of AP, then can find AC by broadcasting packet, if AC is interconnected by three layers with AP, then need be by other agreements such as DHCP (Dynamic Host Configuration Protocol, DHCP), DNS (Domain Name Server, name server) obtains the information of AC, sets up CAPWAP tunnel with AC then.
HWMP (Hybrid Wireless MESH Protocol, hybrid wireless MESH agreement) is the Routing Protocol that solves in the WLAN protocol family in the Wireless MESH network, defines in 802.11s.The MESH network configuration as shown in Figure 1, comprise: MP (MESH Point, MESH point), MPP (MESH Pointcollocated with a mesh Portal, the MESH point of configuration mesh inlet), MAP (MESH AccessPoint, the MESH access point) and STA (Station, website).MAP realizes that STA inserts the function of MESH network, and MPP realizes the IWF of MESH network and external network.
The sight that the HWMP agreement attempts to solve is that all nodes all move in the network, and can both dynamically keep in any way and the getting in touch of other node, network node can move everywhere, also startup and shutdown at any time, and these all can make topology of networks change at any time.The HWMP agreement comes from AODV (Ad hoc On-demand Distance Vector Routing, wireless self-networking is plan range vector Routing Protocol as required), it is the distance vector protocol of data-driven, concrete implementation procedure comprises: need send to destination when the source end has data, and when the source end did not arrive the route of destination, the source end obtained the route of destination by sending route request information; After destination is received the route requests that the source end sends, respond route replies message.The characteristics of this method are the maintenance on demand routing iinformations, have farthest reduced the routing iinformation quantity of safeguarding, the expense of Routing Protocol is less.But because when sending data, if there is not effective route of destination address in the routing table of MP, then need to initiate route requests, the data that need to send this moment must be got up by buffer memory, wait sends after finding suitable route again, has increased the propagation delay time of data.Particularly when repeatedly attempting route requests, buffer memory can all can not send out in a lot of time.In addition, when the needs broadcast data, because can't determine the composition of network, unconfined forwarding is gone down so need (such as the time, transmit the jumping figure restriction) in restrictive condition, causes network congestion easily.
Being embodied as one of method that MP directly sets up Routing Protocol in the prior art is by RA-OLSR (Radio Aware Optimal Link State Routing, wireless aware is optimized the Link State route) agreement.The RA-OLSR agreement is a kind of Routing Protocol of optionally answering earlier in the IEEE 802.11s frame structure, employing is based on the shortest path first of wireless aware yardstick, can directly set up Routing Protocol for MP, different with AODV is, RA-OLSR is by protocol massages maintaining routing information in network in advance.But be to use the shortcoming of this method to be, RA-OLSR is not the 802.11s agreement of recommending and be optional agreement, causes it to be of limited application.In addition, the performance of RA-OLSR sharply descends along with increasing of network node, can not be applicable to large scale network.At last, the complexity height of RA-OLSR agreement, realization difficulty in actual applications is big.
Summary of the invention
The embodiment of the invention provides route maintenance method and equipment between a kind of MESH point, to solve the defective of setting up the routing plan complexity in the prior art between the MESH point.
The invention provides route maintenance method between a kind of MESH point, be applied to comprise that this method may further comprise the steps in the network that a plurality of MESH order:
The MESH point comprises source MESH dot address and routing iinformation to other MESH point broadcast announcement message in the described notification message;
The MESH point that receives described notification message is determined optimum route between described and the source MESH point according to described routing iinformation.
Described MESH point also comprised before the described notification message of other MESH point broadcasting:
Described MESH point is provided with described notification message, and the routing iinformation in the described notification message specifically comprises: source MESH dot address information, aim sequence DSN, jumping figure and accumulative total cost value.
Also comprise after receiving described notification message: the MESH point of described receiving notice message is forwarded to next jumping MESH point after revising described notification message.
Described amendment advice message specifically comprises:
With described aim sequence number add one, jumping figure adds one, the time-to-live subtracts one, increase the accumulative total cost value of this MESH point in the accumulative total cost value.
Described reception MESH point determines whether to abandon described notification message according to the routing iinformation in the described notification message.
The described condition that abandons comprises: the aim sequence in the described notification message number is less than the aim sequence in the previous notification message number; Or the aim sequence in the described notification message number equals the aim sequence number in the previous notification message, and the accumulative total cost value in the notification message is more than or equal to the accumulative total cost value in the previous notification message.
Described MESH point is regularly or in real time to other MESH point broadcast announcement message.
The present invention also provides a kind of MESH point, comprising:
The notification message transmitting element is used for comprising source MESH dot address and routing iinformation in the described notification message to other MESH point broadcast announcement message of network;
The notification message receiving element is used to receive described notification message;
The route determining unit is used for determining optimum route between described and the source MESH point according to the routing iinformation of described notification message.
Comprise that also notification message is provided with the unit, be used to be provided with the notification message that described MESH point sends.
Also comprise the announcement information memory cell, be used to store the notification message that this MESH puts and other MESH is ordered.
Also comprise notification message modification unit, be used for revising the notification message of described reception, and send to next jumping MESH point by described notification message transmitting element according to routing iinformation.
Also comprise the notification message discarding unit, be used for determining whether to abandon described notification message according to routing iinformation.
Compared with prior art, the embodiment of the invention has the following advantages:
In the embodiments of the invention, on the basis of HWMP agreement, a kind of simple and effective mesh point route learning method is provided, safeguard the route learning that MESH is ordered by MP ANOUNCEMENT information-driven, avoid the route requests answering in the HWMP agreement, reduced the propagation delay time of message.
In addition, if, then avoided route requests and answering in the HWMP message fully, improved the efficient of MP greatly in conjunction with ARP proxy process to STATION.
Description of drawings
Fig. 1 is a MESH network structure in the prior art;
Fig. 2 is a route maintenance method flow chart between a kind of MESH point of the present invention;
Fig. 3 is a route maintenance method flow chart between the another kind of MESH point of the present invention;
Fig. 4 is information unit structure figure in the notification message of the present invention;
Fig. 5 is a route maintenance system construction drawing between a kind of MESH point of the present invention.
Embodiment
Core concept of the present invention has been avoided the MP route is carried out route requests by the routing iinformation of all MP in the MESH point notification message structure MESH network, has reduced propagation delay time.
The invention provides route maintenance method between a kind of MESH point, be applied to comprise that this method may further comprise the steps as shown in Figure 2 in the network that a plurality of MESH order:
Step s201, MESH point comprise source MESH dot address and routing iinformation regularly or in real time to other MESH point broadcast announcement message in this notification message.Wherein, routing iinformation specifically comprises: source MESH dot address information, aim sequence DSN, jumping figure and accumulative total cost value.
Step s202, the MESH point of receiving notice message determine according to routing iinformation and source MESH point between optimum route.Receive the MESH point and determine whether discard notification message according to the routing iinformation in the notification message, the condition of its discard notification message comprises: the aim sequence in the notification message number is less than the aim sequence in the previous notification message number; Or the aim sequence in the notification message number equals the aim sequence number in the previous notification message, and the accumulative total cost value in the notification message is more than or equal to the accumulative total cost value in the previous notification message.
In addition, before the step s201, comprise that also the MESH point is provided with notification message.
Among the step s202, also need behind the MESH point receiving notice message to be forwarded to next jumping MESH point after the amendment advice message.Amendment advice message specifically comprises: with aim sequence number add one, jumping figure adds one, the time-to-live subtracts one, increase the accumulative total cost value of this MESH point in the accumulative total cost value.
Be that example describes to adopt HWMP agreement communication notification messages between the MESH point below, adopt MESH network as shown in Figure 1 equally, and be applicable to equipment such as MPP, MAP, MP that detailed process may further comprise the steps as shown in Figure 3:
Step s301, MP is carried by the notification message in the HWMP agreement increasing a MP ANOUNCEMENT information unit, and other MP broadcasting can be notified other this MP of MP maintainable routing iinformation in network.This MP ANOUNCEMENT information unit as shown in Figure 4, concrete implication is as shown in table 1:
Table 1:
| The territory | Describe |
| Element ID | Information unit ID needs definition |
| Length | Information unit length |
| Hop Count | Source MP is to the accumulative total jumping figure of the MP that sends this information unit |
| Time to Live | This information unit can be continued the jumping figure of transmission |
| Originator Address | The address of source MP |
| Destination Sequence Number | Identify unique sequence number of this information unit, be provided with by source MP |
| Life Time | The pairing forwarding information of this information unit is in the time-to-live that receives on the MP |
| Metric | Source MP is to the accumulative total cost value of the MP that sends this information unit |
Step s302, MP be other MP broadcast announcement message in network regularly, carries MP ANOUNCEMENT information unit in this notification message, by this information unit reached at the information of the MP of this equipment and maintenance thereof is propagated into other MP.Wherein, regularly sending function can realize that behind MP ANOUNCEMENT timer expiry, MP constructs the MP ANOUNCEMENT information unit of this equipment by the MPANOUNCEMENT timer is set, and wherein Element ID is the ID of information unit; Length is the length of information unit; Hop Count gets 0; Time to Live is made as the maximum hop count of permission; Originator Address is the address of source MP; Destination Sequence Number is that the sequence number that used last time adds 1; Life Time is the time-to-live of this information; Metric is initial cost value, gets 0.
Step s303, other MP are maintained into the optimum route of this source MP according to the source MP address information in the MP ANOUNCEMENT information unit that receives; And record address (OriginatorAddress), DSN (Destination Sequence Number), Hop Count and the Metric of this source MP.When reception MP also has next jumping MP, need to revise the MP ANOUNCEMENT information unit that receives, the Hop Count in the information unit territory is added 1, Time to Live subtracts 1, and the Metric value adds the Metric part of this equipment; Then, amended MP ANOUNCEMENT information unit is forwarded to next MP.Simultaneously, the MP ANOUNCEMENT information unit that the MP of this reception also needs oneself to create sends to next MP, and is identical with step s302 with step s301.
In addition, receive MP all MP ANOUNCEMENT information units are all transmitted, needs abandon this MP ANOUNCEMENT information unit when satisfying following condition.The condition that specifically abandons comprises:
A kind ofly be: the DSN in the MP ANOUNCEMENT information unit that receives illustrates that less than from the DSN in the previous MP ANOUNCEMENT information unit of identical sources MP this MPANOUNCEMENT information unit is not up-to-date information unit, therefore abandons.
Another kind is: though the DSN in the MP ANOUNCEMENT information unit that receives equals the DSN in the previous MP ANOUNCEMENT information unit of identical sources MP, but Metric is more than or equal to the Metric in the previous MP ANOUNCEMENT information unit of identical sources MP, illustrate that the accumulative total cost value is greater than once preceding, situations such as, jumping figure many such as bandwidth occupancy is many, consider from the angle of saving the route cost, should abandon.If the DSN that the DSN that receives safeguards greater than this machine shows that this is the message of a renewal, need with the original content of safeguarding of the content to replace of this new information.
In addition, the present invention can be mutual in conjunction with the ARP proxy routing iinformation of STA, promptly increases ARP proxy in network, each MP all with the regularly mutual up-to-date routing iinformation of this ARP proxy, thereby avoided route requests and answering in the HWMP agreement, improved the efficient of MP.
The present invention makes up the routing iinformation of all MP in the MESH network by MP ANNOUNCEMENT information, has avoided the MP route is carried out route requests, has reduced propagation delay time.
The present invention also provides a kind of MESH point, comprising: notification message transmitting element 10 is used for comprising source MESH dot address and routing iinformation in the notification message to other MESH point broadcast announcement message of network; Notification message receiving element 20 is used for receiving notice message; Route determining unit 30, be used for according to the routing iinformation of notification message determine and source MESH point between optimum route; Notification message is provided with unit 40, is used to be provided with the notification message that this MESH point sends; Announcement information memory cell 50 is used to store the notification message that this MESH puts and other MESH is ordered; Notification message is revised unit 60, is used for revising the notification message that receives according to routing iinformation, and sends to next jumping MESH point by the notification message transmitting element; Notification message discarding unit 70 is used for determining whether to abandon this notification message according to routing iinformation.
In the system that as shown in Figure 5 a plurality of above-mentioned MESH point constitutes, can carry out route maintenance between each MESH point.Notification message in the MESH point 1 is provided with unit 40 notification message that MESH point 1 sends is set, and stores announcement information memory cell 50 into; Notification message transmitting element 10 in the MESH point 1 is provided with from notification message that call notification message sends to MESH point 2 unit 40 or the announcement information memory cell 50, comprises the address and the routing iinformation of source MESH point 1 in this notification message.
Notification message receiving element 20 receives the notification message that sends from MESH point 1 in the MESH point 2, in the MESH point 2 route determining unit 30 according to the routing iinformation in this notification message the optimum route between the definite and MESH point 1.If there are a plurality of MESH points in the network, then the notification message in the MESH point 2 is revised unit 60 and is revised the notification message that receives according to routing iinformation, and sends to next jumping MESH point by the notification message transmitting element.When the notification message that receives is undesirable, abandon this notification message by notification message discarding unit 70.
Generally, the structure of MESH point 1MESH point 2 should be identical, and each MESH point should have source and destination MESH point function simultaneously.In order to be illustrated more clearly in the operation principle of system, be called MESH point in source in the time of can establishing MESH point transmission message, the MESH point is called reception MESH point when receiving message.MESH point in source comprises source MESH dot address and routing iinformation to other MESH point broadcast announcement message in the notification message; Receive the MESH point, according to the routing iinformation in the notification message determine and source MESH point between optimum route.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (12)
1, route maintenance method between a kind of MESH point is applied to comprise in the network that a plurality of MESH order, and it is characterized in that this method may further comprise the steps:
The MESH point comprises source MESH dot address and routing iinformation to other MESH point broadcast announcement message in the described notification message;
The MESH point that receives described notification message determine according to described routing iinformation and described source MESH point between optimum route.
2, route maintenance method between the MESH point according to claim 1, it is characterized in that, described MESH point also comprised before the described notification message of other MESH point broadcasting: described MESH point is provided with described notification message, and the routing iinformation in the described notification message specifically comprises: source MESH dot address information, aim sequence DSN, jumping figure and accumulative total cost value.
3, as route maintenance method between the MESH point as described in the claim 2, it is characterized in that, also comprise: the MESH point that receives described notification message is revised described notification message, and described amended notification message is forwarded to next jumping MESH point.
4, as route maintenance method between the MESH point as described in the claim 3, it is characterized in that described amendment advice message specifically comprises:
With described aim sequence number add one, jumping figure adds one, the time-to-live subtracts one, increase the accumulative total cost value of this MESH point in the accumulative total cost value.
5, as route maintenance method between the MESH point as described in the claim 3, it is characterized in that the described MESH point that receives notification message determines whether to abandon described notification message according to the routing iinformation in the described notification message.
6, as route maintenance method between the MESH point as described in the claim 5, it is characterized in that the described condition that abandons comprises: the aim sequence in the described notification message number is less than the aim sequence in the previous notification message number; Or the aim sequence in the described notification message number equals the aim sequence number in the previous notification message, and the accumulative total cost value in the notification message is more than or equal to the accumulative total cost value in the previous notification message.
As route maintenance method between the MESH point as described in each in the claim 1 to 6, it is characterized in that 7, described MESH point is regularly or in real time to other MESH point broadcast announcement message.
8, a kind of MESH point is characterized in that, comprising:
The notification message transmitting element is used for comprising source MESH dot address and routing iinformation in the described notification message to other MESH point broadcast announcement message of network;
The notification message receiving element is used to receive described notification message;
The route determining unit is used for determining optimum route between described and the source MESH point according to the routing iinformation of described notification message.
9, as MESH point as described in the claim 8, it is characterized in that, comprise that also notification message is provided with the unit, be used to be provided with the notification message that described MESH point sends.
10, as MESH point as described in the claim 8, it is characterized in that, also comprise the announcement information memory cell, be used to store the notification message that this MESH point and other MESH are ordered.
11, as MESH point as described in the claim 8, it is characterized in that, comprise that also notification message revises the unit, be used for revising the notification message of described reception, and send to next by described notification message transmitting element and jump MESH point according to routing iinformation.
12, as MESH point as described in the claim 8, it is characterized in that, also comprise the notification message discarding unit, be used for determining whether to abandon described notification message according to routing iinformation.
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| WO2009115020A1 (en) * | 2008-03-21 | 2009-09-24 | 华为技术有限公司 | Network route establishing and data transmitting method and network node |
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| CN102415161A (en) * | 2009-04-21 | 2012-04-11 | 诺基亚公司 | Wireless station connectivity information distribution |
| CN101867996B (en) * | 2009-04-14 | 2013-01-09 | 华为技术有限公司 | Multi-radiofrequency mesh network transmission method, network node and system |
| CN104412548A (en) * | 2013-12-31 | 2015-03-11 | 华为技术有限公司 | Method and device for keeping user device IP address fixed |
| CN105451158A (en) * | 2014-09-19 | 2016-03-30 | 美国博通公司 | Bluetooth low energy automation mesh network |
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| CN108401227A (en) * | 2018-03-07 | 2018-08-14 | 乐鑫信息科技（上海）有限公司 | A kind of method and system for establishing connectionless mesh networks routing |
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| WO2009115020A1 (en) * | 2008-03-21 | 2009-09-24 | 华为技术有限公司 | Network route establishing and data transmitting method and network node |
| CN101867996B (en) * | 2009-04-14 | 2013-01-09 | 华为技术有限公司 | Multi-radiofrequency mesh network transmission method, network node and system |
| CN102415161A (en) * | 2009-04-21 | 2012-04-11 | 诺基亚公司 | Wireless station connectivity information distribution |
| CN102088738A (en) * | 2009-12-07 | 2011-06-08 | 华为技术有限公司 | Request sending method and system, initial node, middle node and target node |
| CN104412548A (en) * | 2013-12-31 | 2015-03-11 | 华为技术有限公司 | Method and device for keeping user device IP address fixed |
| CN105451158B (en) * | 2014-09-19 | 2019-07-05 | 安华高科技股份有限公司 | Bluetooth Low Energy automatic grid network |
| CN105451158A (en) * | 2014-09-19 | 2016-03-30 | 美国博通公司 | Bluetooth low energy automation mesh network |
| US10680998B2 (en) * | 2015-11-10 | 2020-06-09 | International Business Machines Corporation | Method, system, and computer program product for a network device in switchless networks |
| CN105722150A (en) * | 2016-02-02 | 2016-06-29 | 浪潮软件集团有限公司 | Wireless network |
| CN106685836A (en) * | 2017-03-23 | 2017-05-17 | 江苏中科羿链通信技术有限公司 | HWMP on-demand routing broadcast packet suppression method |
| CN106685836B (en) * | 2017-03-23 | 2020-01-14 | 江苏中科羿链通信技术有限公司 | HWMP on-demand routing broadcast packet suppression method |
| CN108401227A (en) * | 2018-03-07 | 2018-08-14 | 乐鑫信息科技（上海）有限公司 | A kind of method and system for establishing connectionless mesh networks routing |
| US11212729B2 (en) | 2018-03-07 | 2021-12-28 | Espressif Systems (Shanghai) Co., Ltd. | Method and system for establishing connectionless mesh network route |
| CN108900517A (en) * | 2018-07-10 | 2018-11-27 | 吉林大学 | A kind of Security routing defence method based on HWMP agreement |
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