CN101185255B

CN101185255B - Method and system for conveying backhaul link information for intelligent selection of a mesh access point

Info

Publication number: CN101185255B
Application number: CN2006800188438A
Authority: CN
Inventors: 文森·罗伊
Original assignee: InterDigital Technology Corp
Current assignee: InterDigital Technology Corp
Priority date: 2005-06-14
Filing date: 2006-06-06
Publication date: 2012-07-18
Anticipated expiration: 2026-06-06
Also published as: TWI379544B; AR053904A1; CN101185255A; TW200704218A; TW201016054A

Abstract

A method and system for conveying backhaul link information for intelligent selection of a mesh access point (MAP) in a mesh network are disclosed. The mesh network includes a plurality of MAPs. The MAPs send backhaul link information regarding backhaul connections between each MAP and any interconnections in the mesh network to a wireless transmit/receive unit (WTRU). The WTRU then determines a performance value with respect to the MAPs based on the backhaul link information and selects one of the MAPs to associate with based on the performance value. The WTRU may send information about interconnection needs of the WTRU to the MAPs, and the MAPs may generate the backhaul link information based on the interconnection needs of the WTRU.

Description

Transmit the backhaul link information and supply mesh access points intelligent selecting method and system

Technical field

The invention relates to a kind of wireless communication system.The present invention especially about a kind of in order to transmit backhaul (backhaul) link information, carry out the method and the device of Intelligence Selection for the mesh access points in mesh network.

Background technology

A traditional wireless network comprises one group of access point (APs) (also being called base station), and respectively this access point system is connected to a backhaul network.In some arrangement situation, it is so high directly a given AP to be connected to the cost of this backhaul network, and therefore, just normal use is with the non-scheme that directly is connected to this backhaul network of this AP.The non-direct connection of this kind typically be through trunk information to contiguous APs in mesh network, or reach by being close to the APs trunk information.This kind mode just is regarded as mesh architecture.

So-called mesh network is a kind of LAN (LAN), and it comprises a plurality of sites (MPs), can use wired or wireless link between the MPs.Interlinking between network and non-network a little is called inlet (portal), and the network with a plurality of inlets then is called the multiple entry network, and the node that has AP and MP function again then is called mesh access points (MAP).Shown in Figure 1 is the example figure of mesh network 100, and this mesh network 100 comprises a plurality of MPs 102, a plurality of MAPs 104 and a mesh portal 106.This MPs 102 is passing on and via node as this mesh network 100.This MPs 102 receives news be engaged in (traffic) in input link, and connects at discharging chain and to pass on this news affair.This MAPs 104 also is MPs, and it has an interface can provide a plurality of wireless transmission/receive units of radio access (WTRUs) 108, to be provided at the wireless service of particular locality.This mesh portal 106 ties up to be provided in this mesh network 100 and being connected an of backbone network (backbone network) 110 (similarly being the internet), and therefore, just mesh portal 106 is to have to the MP of the particular interface of this backbone network 110 as one.Respectively this WTRUs 108 is via this MAPs 104 and this mesh portal 106, communicates by letter with other WTRU in this mesh network 100, or communicates by letter with this backbone network 110.This MAPs 104 passes on the news that produced by this WTRUs 108 and is engaged in, and to another MAP 104 or this mesh portal 106, it is through should news affair accomplishing through MPs 102 and/or MAPs 104 relayings.

Mesh network is reliable, and can produce redundant information (redundancy).Even if one or more MPs no longer operates, remaining MPs still can directly or see through one or more relaying MPs mutual communication, so that this network can suitably be brought into play function.On other is considered; Similarly be more to be prone to reach arrangement aspect faster, mesh network also has its advantage, and this is because mesh network need not provide direct backhaul link; Need mutual link block be provided yet, just can accomplish arrangement for respectively this MP in this mesh network.

In traditional non-meshed wireless communication system, which AP WTRU need estimate will provide best communication linkage to this WTRU.Typically can use WTRU following message and method decide with which AP linking:

1) identification candidate AP is its a part of network.For example: in IEEE 802.11 systems, this identification system is corresponding in beacon frame or probe response frames, offers this services set recognin (SSID, service set identifier) of this WTRUs;

2) ability of this candidate AP comprises the service of supporting about this AP.For example: in IEEE 802.11 systems, this ability information system is contained in the capability information field of beacon frame or probe response frames; Or

3) the accessible data throughput of expection.For example: this WTRU can pass through to measure from the received power on beacon frame, probing response frame or other frame of an AP, and the throughput of estimation expection.This received power, signal than (SINR) or similarly measure, are typically set the maximum rate that this WTRU can reach to interference plus noise on a given communication linkage.This WTRU also can use channel to take or the channel load measure, no matter be to be measured or collected by this AP by this WTRU, to estimate desired throughput accurately.

Above-mentioned in order to select WTRU information and the method for the AP that should link, no longer suitable in mesh network.For instance; In the WLAN of a conventional architectures pattern, the throughput that given WTRU-AP link can reach, only with this AP and this WTRU between the characteristic of special wireless link relevant; (that is channel takies, received power, signal to interference plus noise than (SINR) or the like).Yet in a mesh network, it is relevant that throughput is not only the characteristic of the wireless link between the MAP with a given WTRU and its service, its also with this service MAP and other relaying MPs between the characteristic of wireless link relevant.Wherein, this news affair is passed on to this mesh portal by this service MAP by this relaying MPs system.

Shown in Figure 2 is the intelligent relevant issues example figure of conventional mesh network 200.In this embodiment, this mesh network 200 comprises three MAPs 201,202, reaches 203.This

MAPs

201 and 203 is mesh portal, and it can be connected to this internet 230 via a router two 20.The mutual connection resource of this MAPs 201,203 can be the Ethernet basis.In this embodiment; This MAP 202 and this MAP 203 are the candidate MAPs for WTRU 210; If this WTRU 210 is connected to this MAP 102 with this MAP 102; Just then extremely/and be engaged in and can be ranked through the route of wireless link L2 and L1 from the news of this internet 230 by this MAP 201, if this WTRU 210 is connected to this MAP 203, then extremely/be engaged in just can being ranked from the news of this internet 230 through the route of wireless link L3.The wireless link characteristic of wireless link L1, L2, L3 lies in explanation in the following table 1.

Wireless link	Node		SNR	Transfer rate	The singular link throughput
						L1	MAP1	MAP2	10 dB	12Mbps	5Mbps
L2	STA	MAP2	35 dB	54Mbps	20Mbps
						L3	STA	MAP3	20 dB	36Mbps	15Mbps

Table 1

According to table 1, if this WTRU 210 is connected to this MAP 203, then throughput will be 15Mbps.Yet if this WTRU 210 is connected to this MAP 202, throughput will be by the data throughput combination decision of two link L1, L2, its following usually estimation:

1/ (1/L1 throughput+1/L2 throughput) equation (1)

If user's formula (1) is calculated wireless link L1, L2, then the throughput of combination will be 1/ (1/5+1/20) or 4Mbps.Provable through this calculating, this WTRU 210 is connected to this MAP 203, will better throughput be arranged than being connected to MAP 202.With regard to long-range angle integral net mesh network 200, it is preferable selections that WTRU is connected to MAP 203.Wireless link L1 and L2 between this WTRU 210 and this MAP 201, the throughput that is provided than the multipoint wireless between WTRU 210 and this MAP 203 link also lack 3.75 times (that is: 15Mbps/4Mbps).

In the foregoing embodiments; Known techniques as if than the wireless link L2 between this WTRU 210 of preference and this MAP 202 (signal to noise ratio (SNR), estimate aspect accessible transfer rate, estimating signal link throughput, channel occupancy or the like), but not the wireless link L3 between this WTRU 210 of preference and this MAP 203.In known techniques, because this WTRU 210 do not have device to learn to be connected to this MAP 203 and will preferable throughput be arranged than being connected to this MAP 202, so this WTRU 210 finally just can be connected to more disadvantageous MAP.

Therefore, just need a kind of method and apparatus, can make the MAP in the mesh network that is linked to of this WTRU intelligence.

Summary of the invention

The invention relates to a kind of method and system, in order to transmit be chosen in the mesh access points (MAP) in a mesh network of backhaul link information with intelligence.This mesh network comprises a plurality of MAPs, and this MAPs sends backhaul link information to a WTRU, and this backhaul link information system is about linking in the backhaul between this MAPs respectively, and any the interlinking in this mesh network.This WTRU then determines the efficiency value about this MAP s according to backhaul link information, and selects one of them MAPs to connect according to this efficiency value.This WTRU can send the needed information that interlinks about WTRU and this MAPs, and this MAPs can be according to required this backhaul link information that produces of interlinking of this WTRU.

In conventional system; Because a WTRU does not have device can learn the usefulness of different radio link; This link system is engaged in to a required mesh portal in order to transmit its news; Or transmit from the news of a required mesh portal and be engaged in, so this WTRU may be connected to a MAP, and it is also poor to cause its efficiency ratio to be connected to other MAPs.According to the present invention, a WTRU can estimate that the terminal links (end-to-end connection) desired throughput to the terminal, and this will make this WTRU be connected to a MAP that better usefulness all is provided from WTRU and total system.

Description of drawings

Shown in Figure 1 is the mesh network embodiment calcspar of a convention;

Shown in Figure 2 is the intelligent attachment problem example figure of a convention mesh network;

Shown in Figure 3 is a signal transmission figure between a MAP and a WTRU, and in order to be chosen in the MAP in the mesh network, it is to implement according to preferred embodiment of the present invention; And

Shown in Figure 4 is a signal transmission figure between a MAP and a WTRU, and in order to be chosen in the MAP in the mesh network, it is to implement according to another preferred embodiment of the present invention.

Embodiment

When after this mentioning " wireless transmission/receive unit (WTRU) ", it comprises but is not restricted to, and user's equipment, one moves platform, fixing or moving user unit, a calling set or other any device that can be used in the wireless environment.When after this mentioning " MAP ", it comprises but is not restricted to, a base station, a Node B, a platform controller, an access point or other any type of wireless environment interface arrangement.

Characteristic of the present invention can be integrated in the integrated circuit (IC), or is assigned on a circuit that comprises many interconnecting assemblies.

Shown in Figure 3 is that signal between MAPs 302a-302n and WTRU 304 sends figure, and in order to from MAPs 302a-302n, to select a MAP and its binding, it is according to embodiments of the invention.At least one MAP sends the backhaul link information to this WTRU304 among the MAPs 302a-302n in this mesh network; This backhaul link information system is about linking in the backhaul between this MAPs 302a-302n respectively, and any interlink (step 312) in this mesh network.This backhaul link information can be broadcasted (for example: via beacon frame) in by the zone that respectively this MAPs302a-302n is contained, or can be sent to a specific WTRU via single broadcasting mode (for example: via a probe response frames).Certainly, also can use by the personage who has the knack of this skill known other method, to provide backhaul link information to WTRUs, it is to implement according to the present invention.

Respectively this MAPs 302a-302n is sent to the backhaul link information of this WTRU 304, and it comprises but is not restricted to: 1) the inlet quantity that can communicate by letter of this MAP 302a-302n respectively; 2) this MAP 302a-302n to mesh portal route quantity of being separated respectively; 3) quantity of relay point (hops) and/or respectively the MPs quantity of the disjunctive path of this MAP302a-302n to one mesh portal; 4) the employed average transmission rate of this wireless link respectively, or participate in and respectively pass on the average transmission rate of each different MPs of package between this MAP 302a-302n and a mesh portal; 5) the estimation throughput of this wireless link respectively, or participate in and respectively pass on the estimation throughput of respectively this MP of package between this MAP302a-302n and a mesh portal; 6) the channel occupancy of this wireless link institute consciousness respectively, or participate in and respectively pass on the respectively channel occupancy of this MP institute consciousness of package between this MAP 302a-302n and a mesh portal; 7) this wireless link institute assigned radio resource respectively, or respectively pass on respectively this MP institute assigned radio resource of package between this MAP 302a-302n and a mesh portal by participating in; 8) quality of this wireless link respectively, or participate in and respectively pass on the quality of respectively this MP of package between this MAP 302a-302n and a mesh portal, (for example: Queue time, medium access delay, time jitter, time delay, packet error); And 9) any yardstick that comprises the weights totalling, or any combination of above-mentioned yardstick.

This WTRU 304 is then according to the backhaul link information that is received, decision about the terminal of this MAPs302a-302n respectively to terminal efficiency value (step 314).This backhaul link information makes this WTRU304 after being linked to specific MAP 302a-302n, but this terminal of estimation, wisdom ground is to the efficiency value at terminal.For instance, this WTRU 304 can estimate, along terminal wireless being linked 304 expectable data throughputs of this WTRU by being linked to the terminal that a specific MAP 302a-302n set up.

This WTRU 304 connects (step 316) then according to this efficiency value by selecting a MAP among this MAPs 302a-302n5.Make the method that links decision unlike tradition; Decision of the present invention not only according to the desired usefulness of direct wireless link between this WTRU 304 and a specific MAP 302a-302n (for example: desired throughput); Still according to this terminal to the terminal efficiency value, similarly be that the terminal is to the terminal throughput.

Shown in Figure 4 is that the signal of 404 of at least one MAP 402a-402n and WTRU sends figure, and in order to select a MAP between this MAPs 402a-402n, it is to implement according to another embodiment of the present invention.In this embodiment, this MAPs 402a-402n is according to this WTRU 404 and a specific mesh enters the mouth or the mutual connection requirement of a specific MAP 402a-402n, and produces this backhaul link information.Because the connection requirement of WTRU404 and other WTRU may be different; Therefore; MAP 402a-402n just need know a given WTRU 404 mutual connection requirement (for example: required mesh portal) so that this MAP402a-402n can transmit the backhaul link information about this WTRU 404.

The information that this WTRU 404 sends the mutual connection requirement of this WTRU 404 arrives at least one MAP402a-402n (step 412).Be included in the information in this information, it comprises but is not restricted to: 1) the IP address of 404 desires connections of this WTRU; 2) medium access control (MAC, medium access control) address of the node of 404 desires connections of this WTRU; 3) allow a MAP 402a-402n to discern specific mesh inlet and other mesh portal different address; 4) Subnet address of 404 desires connections of this WTRU; And 5) allow this WTRU 404 of MAP 402a-402n decision to connect required code presupposition or flag.This information can via a probe request, special control frame, as a Frame body some, a broadcast frame or the frame of other form sends.

Respectively this MAPs 402a-402n produces backhaul link information (step 414) according to the mutual connection requirement of this WTRU 404.For instance, need be connected to the WTRU of internet, may select a MAP that best route to a mesh portal is provided, this mesh portal system provides interconnecting between this mesh network and this internet.On the other hand, be positioned at the WTRU of a given basic service set (BSS, basic servive set), may select to be connected with another WTRU that is positioned at contiguous BSS, it selects one can provide best route to the base station of serving this vicinity BSS (or MAP).

Respectively this MAPs 402a-402n then sends this backhaul link information to this WTRU 404 (step 416); This backhaul link information can be broadcasted (for example: via a beacon frame) to this WTRU 404, or directly carries out single broadcasting (for example: via a probe response frames) to this WTRU 404.

This WTRU 404 is then according to the backhaul link information that is received, decision about the terminal of this MAPs402a-402n respectively to terminal efficiency value (step 418).This backhaul link information makes this WTRU404 after being linked to specific MAP 402a-402n, but this terminal of estimation, wisdom ground is to the efficiency value at terminal.For instance, this WTRU 404 can estimate, along terminal wireless being linked 404 expectable data throughputs of this WTRU by being linked to the terminal that a specific MAP 402a-402n set up.This WTRU 404 connects (step 420) then according to this efficiency value by selecting a MAP among this MAPs 402a-402n5.

This MAP also can transmit all backhaul link information to this WTRU, and does not comprise the mutual connection requirement about this WTRU.

Embodiment

One kind be used for one comprise a plurality of mesh access points (MAPs) mesh network make a wireless transmission/receive unit (WTRU) select the method for the mesh access points (MAP) that desire links.

2. like the method for embodiment 1, comprise at least one MAP backhaul link information is sent to this WTRU.

3. like the method for arbitrary embodiment in

embodiment

1 and 2, more comprise this WTRU according to this backhaul link information with the efficiency value of decision about this MAP.

4. like the method for embodiment 3, more comprise this WTRU according to the MAP of this efficiency value to select desire to link.

5. like the method for arbitrary embodiment among the embodiment 2 ~ 4, wherein this backhaul link information comprises the mesh portal quantity that this MAP can communicate by letter.

6. like the method for arbitrary embodiment among the embodiment 2 ~ 5, wherein this backhaul link information comprises the route quantity of separating this MAP and a mesh portal.

7. like the method for arbitrary embodiment among the embodiment 2 ~ 6, wherein this backhaul link information comprises the relay point (hops) of each route that separates this MAP and a mesh portal and the quantity of MPs.

8. like the method for arbitrary embodiment among the embodiment 2 ~ 7, wherein this backhaul link packets of information is contained in the average transmission rate that respectively chains between this MAP and a mesh portal.

9. like the method for arbitrary embodiment among the embodiment 2 ~ 8, wherein this backhaul link packets of information is contained in the estimation of one between this MAP and mesh portal throughput.

10. like the method for arbitrary embodiment among the embodiment 2 ~ 9, wherein this backhaul link packets of information is contained in the channel occupancy that respectively chains institute's consciousness between this MAP and a mesh portal.

11. like the method for arbitrary embodiment among the embodiment 2 ~ 10, wherein this backhaul link packets of information is contained in and respectively chains institute's assigned radio resource between this MAP and a mesh portal.

12. like the method for arbitrary embodiment among the embodiment 2 ~ 11, wherein this backhaul link packets of information is contained in the quality that each link between this MAP and a mesh portal is born.

13. like the method for arbitrary embodiment among the embodiment 2 ~ 12, wherein this MAP is via this backhaul link information of beacon frame broadcasting.

14. like the method for arbitrary embodiment among the embodiment 2 ~ 12, wherein this MAP directly is sent to this WTRU with this backhaul link information via a probe response frames.

15. like the method for arbitrary embodiment among the embodiment 3 ~ 14, wherein this WTRU determines a throughput as this efficiency value.

16. like the method for arbitrary embodiment among the embodiment 1 ~ 14, more comprise this WTRU and this WTRU is connected information needed mutually be sent to this MAP, by this, this MAP according to the mutual connection information needed of this WTRU to produce this backhaul link information.

17. like the method for embodiment 16, wherein this WTRU connects an internet communication protocol (IP) address that information needed comprises a node of this WTRU institute desire connection mutually.

18. like the method for arbitrary embodiment among the embodiment 16 ~ 17, wherein this WTRU connects medium access control (MAC, medium accesscontrol) address that information needed comprises a node of this WTRU institute desire connection mutually.

19. like the method for arbitrary embodiment among the embodiment 16 ~ 18, wherein this WTRU connects information needed mutually and comprises an address that allows this MAP to discern a mesh portal and other mesh portal.

20. like the method for arbitrary embodiment among the embodiment 16 ~ 19, wherein this WTRU connects information needed mutually and comprises the Subnet address that this WTRU institute desire connects.

21. like the method for arbitrary embodiment among the embodiment 16 ~ 20, wherein this WTRU connects information needed mutually and comprises a required code presupposition or the flag of this WTRU connection of this MAP decision of permission.

22. like the method for arbitrary embodiment among the embodiment 16 ~ 21, wherein this WTRU connects information needed via following one of them transmission at least mutually about this WTRU: a probe request, a special control frame, a Frame and a broadcast frame.

23. a mesh network, it comprises a wireless transmission/receive unit (WTRU) and a plurality of mesh access points (MAPs).

24. like the mesh network of embodiment 23, wherein one of them is configured to backhaul link information is sent to this WTRU these MAPs at least.

25. like the mesh network of embodiment 24, wherein this WTRU is configured to determine the efficiency value about this MAP according to this backhaul link information.

26. like the mesh network of embodiment 25, wherein this WTRU is configured to select according to this efficiency value a specific MAP of desire binding.

27. like the mesh network of arbitrary embodiment among the embodiment 24 ~ 26, wherein this backhaul link information comprises the mesh portal quantity that this MAP can communicate by letter.

28. like the mesh network of arbitrary embodiment among the embodiment 24 ~ 27, wherein this backhaul link information comprises the route quantity of separating this MAP and a mesh portal.

29. like the mesh network of arbitrary embodiment among the embodiment 24 ~ 28, wherein this backhaul link information comprises the relay point (hops) of each route that separates this MAP and a mesh portal and the quantity of MPs.

30. like the mesh network of arbitrary embodiment among the embodiment 24 ~ 29, wherein this backhaul link packets of information is contained in the average transmission rate that respectively chains between this MAP and a mesh portal.

31. like the mesh network of arbitrary embodiment among the embodiment 24 ~ 30, wherein this backhaul link packets of information is contained in the estimation of one between this MAP and mesh portal throughput.

32. like the mesh network of arbitrary embodiment among the embodiment 24 ~ 31, wherein this backhaul link packets of information is contained in the channel occupancy that respectively chains institute's consciousness between this MAP and a mesh portal.

33. like the mesh network of arbitrary embodiment among the embodiment 24 ~ 32, wherein this backhaul link packets of information is contained in and respectively chains institute's assigned radio resource between this MAP and a mesh portal.

34. like the mesh network of arbitrary embodiment among the embodiment 24 ~ 33, wherein this backhaul link packets of information is contained in the quality that each link between this MAP and a mesh portal is born.

35. like the mesh network of arbitrary embodiment among the embodiment 24 ~ 34, wherein this MAP is configured to via this backhaul link information of beacon frame broadcasting.

36. like the mesh network of arbitrary embodiment among the embodiment 24 ~ 34, wherein this MAP is configured to directly this backhaul link information is sent to this WTRU via a probing response frame.

37. like the mesh network of arbitrary embodiment among the embodiment 25 ~ 36, wherein this WTRU is configured to determine a throughput as this efficiency value.

38. like the mesh network of arbitrary embodiment among the embodiment 23 ~ 37, wherein this WTRU is configured to that this WTRU is connected information needed mutually and is sent to this MAP.

39. like the mesh network of embodiment 38, wherein this MAP is configured to mutual connection information needed according to this WTRU to produce this backhaul link information.

40. like the mesh network of arbitrary embodiment among the embodiment 38 ~ 39, wherein this WTRU connects an internet communication protocol (IP) address that information needed comprises a node of this WTRU institute desire connection mutually.

41. like the mesh network of arbitrary embodiment among the embodiment 38 ~ 40, wherein this WTRU connects medium access control (MAC) address that information needed comprises a node of this WTRU institute desire connection mutually.

42. like the mesh network of arbitrary embodiment among the embodiment 38 ~ 41, wherein this WTRU connects information needed mutually and comprises an address that allows this MAP to discern a mesh portal and other mesh portal.

43. like the mesh network of arbitrary embodiment among the embodiment 38 ~ 42, wherein this WTRU connects information needed mutually and comprises the Subnet address that this WTRU institute desire connects.

44. like the mesh network of arbitrary embodiment among the embodiment 38 ~ 43, wherein this WTRU connects information needed mutually and comprises a required code presupposition or the flag of this WTRU connection of this MAP decision of permission.

45. like the mesh network of arbitrary embodiment among the embodiment 38 ~ 44, wherein this WTRU is configured to connect information needed via following one of them transmission at least mutually about this WTRU: a probe request, a special control frame, a Frame and a broadcast frame.

Although characteristic of the present invention and assembly are all described with the particular combination mode in embodiment; But each characteristic or assembly can use alone among the embodiment; And do not need further feature or the combination of components with preferred embodiments, or with/do not do different combinations with further feature of the present invention and assembly.Although the present invention has seen through preferred embodiment and described, other is the modification of desorption claim of the present invention not, and is conspicuous concerning the personage who has the knack of this skill.

Claims

1. method that is used for a wireless transmission/receive unit, this wireless transmission/receive unit links with a mesh access points in a mesh network, and this mesh network comprises a plurality of mesh access points, it is characterized in that, and this method comprises:

Receive backhaul link information, this backhaul link information comprises an estimation throughput relevant with this mesh access points;

According to this backhaul link information to determine an efficiency value; And

Whether link with decision according to this efficiency value with this mesh access points.

2. method according to claim 1 is characterized in that, more comprises to determine a throughput as this efficiency value.

3. method according to claim 1 is characterized in that, more comprises:

Transmission connects information needed mutually.

4. method according to claim 3; It is characterized in that, this connect mutually information needed comprise following at least one of them: a medium access control address of the node that an internet communication protocol address of the node that this wireless transmission/receive unit institute desire connects, this wireless transmission/receive unit institute desire connect and the Subnet address that this wireless transmission/receive unit institute desire connects.

5. method according to claim 3 is characterized in that, this connects information needed mutually via following one of them transmission at least: a probe request, a special control frame, a Frame and a broadcast frame.

6. mesh network, this mesh network comprises a wireless transmission/receive unit, it is characterized in that, and this wireless transmission/receive unit comprises

One receiver is configured to receive backhaul link information, and this backhaul link information comprises an estimation throughput relevant with a mesh access points; And

One processor is configured to determine an efficiency value according to this backhaul link information, and determines whether link with this mesh access points according to this efficiency value.

7. mesh network according to claim 6 is characterized in that, this processor more is configured to determine a throughput as this efficiency value.

8. mesh network according to claim 6 is characterized in that, more comprises:

One transmitter is configured to send mutual connection information needed.

9. mesh network according to claim 8; It is characterized in that, this connect mutually information needed comprise following at least one of them: a medium access control address of the node that an internet communication protocol address of the node that this wireless transmission/receive unit institute desire connects, this wireless transmission/receive unit institute desire connect and the Subnet address that this wireless transmission/receive unit institute desire connects.

10. mesh network according to claim 8; It is characterized in that this wireless transmission/receive unit more is configured to should connect information needed mutually via following one of them transmission at least: a probe request, a special control frame, a Frame and a broadcast frame.