CN102047725B - Apparatus and method for a device at opposite end of a base station to select communication path in a wireless network - Google Patents

Abstract

A method for a device at opposite end of a base station to select uplink/downlink communication path between the device and the base station in a wireless relay network comprises the following steps: obtaining the communication quality information of one or more corresponding available communication paths between one or more base stations and the device at opposite end of the base station; selecting a communication path with better communication quality as the selected communication path between the base station and the device at opposite end of the base station from one or more available communication paths based on the communication quality information of these communication paths.

Description

The base station opposite equip. is selected the method and apparatus of communication path in the wireless network

Technical field

The present invention relates to based on cordless communication network, relate in particular to the method and apparatus of the base station opposite equip. selection communication path in the cordless communication network.

Background technology

Current wireless network is more and more higher to the requirement of power system capacity, and how to improve constantly communication performance be a major issue in this area issuing fixed frequency band.Because relaying and multi-hop relay have significant effect to increasing throughput of system, have therefore obtained paying close attention to more and more widely.Because the introducing of relay, can be for the base station opposite equip. in the network, for example relay station or portable terminal, having increased of selectable communication path, therefore opposite equip. How to choose suitable communication path in base station becomes the technical problem that current this area is paid close attention to.

In current relaying/hop relay network, the base station opposite equip., for example relay station or portable terminal may be in the zone that is covered simultaneously by a plurality of relay stations and/or base station.Simultaneously, these a plurality of alternative access websites, namely a plurality of relay stations and/or base station may belong to respectively different residential quarters.Therefore, the base station opposite equip. is in access or again during access of radio network, and should be able to be from these alternative access websites more excellent one be accessed, and links to each other with the base station of respective cell by a more excellent communication path.How fast and effectively selection of base stations is the key issue that must solve in the wireless multi-hop network to the more excellent communication path of the communication quality of base station opposite equip..Wherein, communication path comprises the base station to the downlink communication path of this base station opposite equip., with the uplink communication path of this base station opposite equip. to this base station.

For the WiMAX cordless communication network, the applicant is in the IEEE802.16m draft in March, 2008 is discussed, proposed following communication path selection scheme: acquisition for mobile terminal upper hop relay station is to the communication quality information of the down link of this portable terminal, and this information is fed back to the base station; This upper hop relay station obtains its higher level's network equipment equally to the communication quality information of the down link of this relay station, also this information is fed back to the base station; By that analogy, final base station will obtain the communication quality information of all links in this base station to the downlink communication path of this portable terminal, and determine that for this portable terminal preferred this base station is to the downlink communication path of this portable terminal according to these information.In like manner, the upper hop relay station of portable terminal obtains this portable terminal to the communication quality information of the uplink communication link of this base station, and this information is fed back to the base station; The higher level equipment of this upper hop network equipment is also reported this upper hop network equipment to the communication quality information of the uplink communication link of this equipment to the base station; By that analogy, final base station will obtain should portable terminal to the uplink communication path of this base station the communication quality information of all links, and according to these information for definite preferably this base station of this portable terminal to the uplink communication path of this portable terminal.This technical scheme has following shortcoming:

1. portable terminal and each relay communication quality information from each bar link to the base station that report need to consume certain resource, and causes extra delay;

2. be in cell edge at portable terminal, when being covered by a plurality of access websites that belong to different districts, the base station of different districts only can know this portable terminal in this jurisdiction district, base station than shortest path, and can't learn the situation of the alternative path of other residential quarters, thereby can't be that this portable terminal is determined preferably access website.

Summary of the invention

For solving the above-mentioned shortcoming of prior art, the present invention proposes in cordless communication network, be used to the base station opposite equip. to select the method for the communication path between this base station opposite equip. and the base station.The base station opposite equip. self obtains the communication quality information of the communication path that between this base station opposite equip. and the candidate BS or multi-hop can use, then from this one or more available communication path, select communication quality more excellent be selected present networks equipment and the communication path between the base station.

According to a first aspect of the invention, a kind of method that is used for the selection of the communication path between selection base station and this base station opposite equip. in the opposite equip. of the base station of cordless communication network is provided, wherein, may further comprise the steps: i. obtains the communication quality information of corresponding one or more available communication path between one or more base stations and described this base station opposite equip.; Ii. according to the communication quality information of corresponding one or more available communication path between described one or more base stations and described this base station opposite equip., therefrom selecting one or more more excellent available communication path of communication quality is selected communication path between base station and described this base station opposite equip..

According to a second aspect of the invention, a kind of device that is used for selecting the communication path between base station and this base station opposite equip. in the opposite equip. of the base station of cordless communication network is provided, wherein, comprise: the first deriving means is used for obtaining the communication quality information of corresponding one or more available communication path between one or more base stations and described this base station opposite equip.; Choice device, be used for the communication quality information according to corresponding one or more available communication path between described one or more base stations and described this base station opposite equip., therefrom selecting one or more more excellent available communication path of communication quality is selected communication path between base station and described this base station opposite equip..

Preferably, this base station opposite equip. is trunking or portable terminal, when it enters or reenters cordless communication network, its relevant information that will select communication path report to base station corresponding to described selected communication path or, so that this base station opposite equip. is distributed to the communication path of correspondence in the base station; When it carried out the residential quarter switching, its relevant information that will select communication path was reported to the present affiliated base station of this base station opposite equip..

Preferably, this base station opposite equip. is trunking, and its relevant information that will select communication path offers the base station opposite equip. that this trunking directly covers, and uses when selecting communication path for these base station opposite equip.s.

The present invention is the method that a kind of fast and efficiently base station opposite equip. is selected the communication path between suitable and the base station.Preferably, relay station or portable terminal can adopt the present invention to choose suitable access path when access network, and report to the base station.Preferably, relay station can be that other base station opposite equip.s of its jurisdiction are selected suitable alternative communication path according to the present invention, and offers these other base station opposite equip.s.According to the present invention, the base station opposite equip. is selected its communication path according to all candidate BS and to the communication quality information of communication path complete between this base station opposite equip., can guarantee this be one for own optimum communication path.Especially be in cell edge at portable terminal, when being covered by a plurality of websites that belong to different districts, this portable terminal can access the situation of each the bar alternative path in different districts, thereby can make more excellent selection in the alternative path of different districts.Moreover, in the present invention, the base station opposite equip. will measurement result not reported to the base station, has saved the communication resource, has reduced that the base station opposite equip. enters or the delay when reentering network.In addition, the present invention preferably synthesizes the equivalent path quality with the communication quality of each section link, simplifies sign, calculating and the transport overhead of the communication quality information of communication path.

Description of drawings

By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, other features, objects and advantages of the present invention will become more apparent:

Fig. 1 shows according to a specific embodiment of the present invention, the topological structure schematic diagram of portable terminal 1 access of radio network;

Fig. 2 shows according to a specific embodiment of the present invention, and in the wireless relay network shown in Figure 1, portable terminal 1 is at the auxiliary lower systems approach flow chart of selecting more excellent downlink communication path of relay station 2a;

Fig. 3 shows according to another specific embodiment of the present invention, and portable terminal 1 is at the auxiliary lower block diagram of selecting the device in more excellent downlink communication path of relay station 2a in the wireless relay network shown in Figure 1.

In the accompanying drawing, identical or the similar identical or similar parts of accompanying drawing sign representative.

Embodiment

, the specific embodiment of the present invention is described in detail from the angle of systems approach to Fig. 2 referring to accompanying drawing 1:

The first embodiment

Fig. 1 shows according to a specific embodiment of the present invention, the topological structure schematic diagram of portable terminal 1 access wireless relay network.Wherein, this wireless relay network is a WiMAX network; Relay station 2a belongs to the residential quarter A of base station 3a administration, and the downstream signal of base station 3a can be by link L ₃Send to relay station 2a, also can be by relay station 2b relaying through L ₁-L ₂To relay station 2a; The upward signal of relay station 2a can be by link L ₃' send to base station 3a, also can be by relay station 2b relaying through L ₂'-L ₁' to base station 3a; Portable terminal 1 is in the coverage of relay station 2a and base station 2b, also is not linked in this wireless network, and the downlink communication link that relay station 2a can set up with portable terminal 1 is L ₅, the uplink communication link is L ₅'; The downlink communication link that base station 2b can set up with portable terminal 1 is L ₄, the uplink communication link is L ₄'.Those skilled in the art will be understood that the present invention is not limited to WiMAX wireless relay network shown in Figure 1 and this topological structure, and the present invention is applicable equally in the wireless network of other types and topological structure.

Fig. 2 shows according to a specific embodiment of the present invention, and in the wireless relay network shown in Figure 1, portable terminal 1 is auxiliary lower relay station 2a's, selects the systems approach flow chart in more excellent downlink communication path.

The below is with reference to Fig. 1 and Fig. 2, to according to the present invention, as the method in the selecting base station of mobile terminal of base station opposite equip. and the downlink communication path between this portable terminal, and select the method in the downlink communication path between base station and this portable terminal to describe in detail as the relay station auxiliary moving terminal of base station opposite equip..

At first, in step S10, portable terminal 1 obtains base station 3a to the communication quality information in the available downlink communication path of this portable terminal.

Concrete, in step S100, portable terminal 1 obtains its relay station 2a of direct covering to the down link L of this portable terminal 1 ₅Communication quality information.In a preferred embodiment, relay station 2a sends broadcast singal in the zone of its covering, and this broadcast singal comprises leading symbol (preamble) etc.Relay station 2a can according to its broadcast singal from relay station 2b that receives, obtain L ₂Communication quality information.For instance, preferred, portable terminal is measured communication quality information according to leading symbol; After perhaps carrying out synchronously according to leading symbol, from this broadcast singal, extract pilot tone (pilot) information, can calculate L with this ₅The path loss of link (Pathloss), spectrum efficiency (frequency efficiency), the multiple information for weighing communication quality such as Signal to Interference plus Noise Ratio (SINR).In another embodiment, the downlink data signal (DL burst) that portable terminal also can send in its jurisdiction district according to relay station 2a obtains L ₅Communication quality information.In other embodiments, also can estimate relay station 2a to the communication quality of the down link of this portable terminal 1 by relay station 2a according to the communication quality of portable terminal 1 to the up link of this relay station 2a, and provide it to this portable terminal 1.It will be understood by those skilled in the art that portable terminal can also use additive method, obtain relay station to the communication quality of its down link, concrete acquisition methods is not that the present invention will discuss.

And in step S101, portable terminal 1 obtains the affiliated base station 3a of relay station 2a to the communication quality information in the one or more downlink communication path of relay station 2a.In a preferred embodiment, portable terminal 1 is at the auxiliary lower communication quality information in one or more downlink communication path that obtains of relay station 2a.

Concrete, in step S20, relay station 2a obtains base station 3a to the communication quality information in the one or more downlink communication path of this relay station 2a.

Wherein, in step S200, relay station 2a obtains relay station 2b to the down link L of this relay station 2a ₂Communication quality information.Preferably, obtain L with above-mentioned portable terminal 1 ₅The method of communication quality information similar, relay station 2a can obtain L according to the broadcast singal of relay station 2b ₂Communication quality information.In another example, relay station 2a had before measured and had preserved L ₂Communication quality information, relay station 2a can obtain L from the data of preserving so ₁Communication quality information.

Then, in step S201, relay station 2a obtains the affiliated base station 3a of relay station 2b to the downlink communication link L of relay station 2b ₁Communication quality information.In a preferred embodiment, relay station 2b can get access to base station 3a to the down link L of relay station 2b ₁Communication quality information, and this information offered relay station 2a in the mode that for example is included in broadcast in its descending sub frame.Wherein, in the present embodiment, relay station 2b can measure L to the downstream signal of this relay station 2b according to base station 3a ₁Communication quality information.Under other network topology structure, if relay station 2b is to also having a relay station between the 3a of base station, relay station 2b obtains its upper hop relay station to the communication quality information of the down link of relay station 2b so, preferably, also use above-mentioned method, measure the communication quality of this down link according to the upper hop relay station to the downstream signal of relay station 2b; Relay station 2b also obtains the affiliated base station 3a of its upper hop relay station to the communication quality of the downlink path of its upper hop relay station, preferably, the upper hop relay station can get access to base station 3a to the communication quality information of the down link of upper hop relay station to the downlink signal quality of upper hop relay station according to base station 3a, and this information is offered relay station 2b in the mode of for example broadcasting.By that analogy, under other network topology structures, if relay station 2b comprises a plurality of relay stations to base station 3a, according to above-mentioned method, relay station 2b finally can get access to its affiliated base station 3a to the communication quality information of the communication path of this relay station 2b.

Then, in step S202, relay station 2a is according to L ₁With L ₂Communication quality information, obtain base station 3a through the relay station 2b downlink communication path L to this relay station 2a ₁-L ₂Communication quality information.

In a preferred embodiment, relay station 2a passes through L ₁-L ₂The path regard as one by base station 3a directly to the virtual link P of this relay station 2a ₁₂, and weigh this virtual link P with the equivalent path quality ₁₂Communication quality.For instance, L ₁With L ₂Communication quality respectively with spectrum efficiency η ₁With η ₂(unit: bps/hertz, bits/s/Hz) characterizing, the equivalent path quality can be virtual link P so ₁₂Spectrum efficiency η ₁₂, relay station 2a can use following formula to calculate η ₁₂:

η ₁₂＝η ₁×η ₂/η ₁+η ₂ (1)

It should be noted that this formula only is for example, is not the unique formula that calculates equivalent spectrum efficiency.For example, can also be to η in this formula ₁Or η ₂Be weighted.For example,

η ₁₂＝η ₁×α·η ₂/η ₁+α·η ₂ (2)

Wherein, α is weight coefficient.

In another example, L ₁With L ₂Communication quality characterize with its SINR, then relay station 2a can be according to SINR, pass through shannon formula, obtain the channel capacity maximum of its corresponding down link, then again in conjunction with the modulation system of the signal transmission on this down link obtain on this link message transmission rate (bps), pass through again L ₁With L ₂Message transmission rate separately can obtain virtual link P ₁₂Message transmission rate, then with this message transmission rate as virtual link P ₁₂The equivalent path quality.Concrete, L ₁With L ₂Message transmission rate separately with t ₁And t ₂Characterize, so virtual link P ₁₂Message transmission rate t ₁₂Can for:

$t_{21}=\frac{1}{1/t_1+1/t_2}---\left(3\right)$

Moreover, in the communication quality of communication path, can also consider simultaneously corresponding transmitter antenna gain and receiver antenna gain, obtain considering the communication quality of the communication path of signal quality with this.It will be understood by those skilled in the art that several communication qualities that this specification lifts just to example, the index of the communication quality of other any measurement communication paths all should fall into the protection range of the present invention and claims.

Obtaining relay station 2a with step S200 to S202, to obtain base station 3a incoherent to the communication quality information in the downlink communication path of relay station 2a via relay station 2b, and in step S203, relay station 2a obtains base station 3a to the down link L of this relay station ₃Communication quality information.It is similar to the method for relay station 2a that concrete acquisition methods and above relay station 2a obtain relay station 2b.Preferably, relay station 2a can obtain L according to the broadcast singal of base station 3a ₃Communication quality information.Preferably, L ₃Communication quality information by spectrum efficiency η ₃Characterize.

Then, in step S21, relay station 2a is according to the downlink communication path L of base station 3a to this relay station 2a ₁-L ₂With L ₃Communication quality information, from P ₁₂With L ₃In selected communication quality more excellent or two downlink communication paths be that base station 3a is to the downlink communication path of this relay station 2a.

Then, in step S22, relay station 2a will select the relevant information in one or two more excellent downlink communication path, for example path topology structure, the communication quality informations in path etc. offer portable terminal 1 in the mode that for example comprises in the broadcast in its descending sub frame.In a kind of situation, relay station 2a need to provide an alternative downlink communication path to portable terminal 1, and that relay station 2a then will offer than the relevant information of shortest path portable terminal 1; In the another kind of situation, relay station 2a need to provide many alternative downlink communication paths to portable terminal 1, and this relay station 2a can offer portable terminal 1 with the relevant information of two paths so.In the present embodiment, relay station 2a need to provide an alternative downlink communication path to portable terminal 1, and L ₁-L ₂Spectrum efficiency η ₁₂Compare L ₃Spectrum efficiency η ₃Height, then relay station 2a is then with L ₁-L ₂Relevant information logical to portable terminal 1.In one case, L ₁-L ₂Relevant information in communication quality represent with the equivalent path quality; In another case, relay station 2a is respectively with L ₁With L ₂Communication quality offer portable terminal 1.

Then in step S101, portable terminal 1 receives base station 3a that the relay station 2a that sends with for example broadcast from relay station 2a selects to the more excellent downlink communication path L of relay station 2a ₁-L ₂Relevant information.

It should be noted that above step S100 and step S101 do not have strict ordinal relation.

Then, in step S102, portable terminal 1 is according to the downlink communication path L that obtains in step S101 ₁-L ₂Communication quality, with the down link L that gets access among the step S100 ₅Communication quality, determine that base station 3a is to the available downlink communication path L of this portable terminal 1 ₁-L ₂-L ₅Communication quality.In one embodiment, L ₁-L ₂Communication quality and L ₅Communication quality respectively with spectrum efficiency η ₁₂And η ₅Characterize, then portable terminal 1 can calculate downlink communication path L according to the mode that is similar to formula (1) ₁-L ₂-L ₅Spectrum efficiency.For example:

η ₁₂₅＝η ₁₂×η ₅/η ₁₂+η ₅ (4)

Further, because portable terminal 1 also is in the coverage of base station 3b of residential quarter B, in step S11, portable terminal 1 obtains base station 3b to the communication quality information in the available downlink communication path of this portable terminal 1.Preferably, similar with aforesaid mode, portable terminal 1 determines that according to the downstream signal from base station 3b base station 3b is to the downlink communication link L of portable terminal 1 ₄Communication quality information.

It should be noted that above step S11 and step S10 do not have strict ordinal relation.

Then, in step S12, portable terminal 1 is according to the downlink communication path L of the base station 3a that gets access in step S10 to this portable terminal 1 ₁-L ₂-L ₅Communication quality, with the downlink communication link L of the base station 3b that gets access among the step S11 to portable terminal 1 ₄Communication quality, therefrom select the downlink communication path of the access to wireless communication network of more excellent this portable terminal of conduct 1 of communication quality.

Preferably, in step S13, portable terminal 1 reports the relevant information in downlink communication path selected among the step S12 to this selected base station corresponding to downlink communication path, and asks this downlink communication path allocation of this base station to be used to this portable terminal 1.

Like this, portable terminal 1 can get access to the situation of each the bar alternative path in the different districts, thereby can make more excellent selection in the alternative path of different districts.This is in the prior art, cann't be solved when being selected by the base station of only knowing the path situation in this residential quarter.

It will be understood by those skilled in the art that the present invention is not only applicable to portable terminal in access or again during access of radio network, select and the base station between more excellent communication path; Also be applicable to relay station in access or again during access of radio network, select and the base station between more excellent communication path.The present invention is equally applicable to the base station opposite equip. and strides the processes such as residential quarter or switching within cell.Wherein, when striding residential quarter or switching within cell, in step S13, the more excellent communication path that the base station opposite equip. will be selected is reported to the present affiliated base station of this base station opposite equip..

The second embodiment

In a further embodiment, portable terminal 1 also will be selected the more excellent uplink communication path to the base station.

In one case, what this cordless communication network was similar to that the applicant proposes in the background technology in the discussion of the IEEE 802.16m in March, 2008 draft gets access to portable terminal to the communication quality of the up path of this base station by the base station, so a plurality of base stations generals this portable terminal separately to the uplink communication quality of this base station offers this portable terminal, in similar step S10 and S11, portable terminal receives the uplink communication quality of the corresponding uplink communication path that a plurality of base stations provide, and in step S12, this mobile terminal self is selected suitable access uplink communication path.

Not only can provide preferred path quality information to portable terminal by the base station, also can provide preferred path quality information to portable terminal by relay station.Concrete, in one case, each relay station obtains this relay station to the preferred up path of affiliated base station, this relay station obtains this base station opposite equip. to the uplink communication quality of this relay station by uplink measurement simultaneously, this relay station select one from this base station opposite equip. via the preferred path of this relay station to this base station, and this preferred path offered this base station opposite equip. for its selection.In another situation, each relay station obtains this relay station to the preferred up path of affiliated base station, and obtain this base station opposite equip. to the uplink communication quality of this relay station by uplink measurement, then by being broadcast to this base station opposite equip. in the coverage, this base station opposite equip. optimizes the preferred path from this base station opposite equip. to this base station.

In another case, this cordless communication network uses the communication mode such as the up-downgoing channel symmetry of TDD (time division duplex) to carry out uplink and downlink communication, and the communication quality in the communication quality of uplink communication path and downlink communication path is essentially identical so.Then be similar to the first embodiment, in step S10 ', portable terminal 1 can use similar method, gets access to base station 3a to the communication quality information in the downlink communication path separately of this portable terminal 1, determines that thus this portable terminal 1 is to the communication quality of the uplink communication path of base station 3a; In like manner, in step S11 ', determine that this portable terminal 1 is to the communication quality of the uplink communication path of base station 3b.Then, portable terminal 1 is according to the communication quality of this portable terminal 1 to the uplink communication path separately of base station 3a and base station 3b in step S12 ', and therefrom a selected more excellent uplink communication path of communication quality is that portable terminal 1 is to the uplink communication path of base station.Preferably, in step S13 ', portable terminal 1 reports the relevant information of uplink communication path selected among the step S12 ' to this selected base station corresponding to uplink communication path, and asks this uplink communication path of this base station to distribute to this portable terminal 1 and use.Those skilled in the art can understand, in up-downgoing channel asymmetric system, if pass through downlink communication quality, can estimate in a certain way more accurately uplink communication quality, and so above situation also can be suitable for.

In another situation, this cordless communication network uses the asymmetrical communication mode of up-downgoing channel such as FDD (Frequency Division Duplexing (FDD)) to carry out uplink and downlink communication.Portable terminal 1 oneself obtains the communication quality information of uplink communication path.

In this case, concrete, in step S10 ', portable terminal 1 obtains this portable terminal to the communication quality information of the available uplink communication path of base station 3a.

Concrete, in step S100 ', portable terminal 1 obtains it to the up link L that directly covers its relay station 2a ₅' communication quality information.Preferably, relay station 2a according to portable terminal 1 send such as upward signals such as distance measurement request, record L ₅' communication quality, and this communication quality offered portable terminal 1.In another example, portable terminal 1 also can be fixed line link L really according to the leading symbol that relay station 2b sends ₅Communication quality, and according to L ₅Communication quality infer L ₅' communication quality.

Among the step S101 ', portable terminal 1 obtains relay station 2a to the communication quality information of the uplink communication path of base station 3a.In a preferred embodiment, portable terminal 1 obtains relay station 2a to the communication quality information of the uplink communication path of base station 3a at the auxiliary lower of relay station 2a.

Concrete, in step 20 ' in, relay station 2a obtains the communication quality of its uplink communication path of 3 to the base station.

Wherein, in step S200 ', relay station 2a gets access to this relay station 2a to the up link L of relay station 2b ₂' communication quality information.Preferably, obtain L with above-mentioned portable terminal 1 ₅' the method for communication quality information similar, relay station 2b can obtain L according to the distance measurement request of relay station 2a ₂' communication quality information, and will and this quality be offered relay station 2a.In another example, relay station 2a also can fix line link L really according to the leading symbol that relay station 2b sends ₂Communication quality, and according to L ₂Communication quality estimate L ₂' communication quality.

Then, in step S201 ', relay station 2a obtains the uplink communication link L of the base station 3a of relay station 2b under the relay station 2b ₁' communication quality information.In a preferred embodiment, relay station 2b can get access to relay station 2b to the up link L of base station 3a ₁' communication quality information, and with this information with for example broadcasting mode offer relay station 2a.Wherein, in the present embodiment, with aforesaid method, base station 3a can measure L according to the upward signal of relay station 2b ₁' communication quality information, and this information offered relay station 2b.Under other network topology structure, if relay station 2b is to also having a relay station between the 3a of base station, relay station 2b obtains it to the communication quality information of the up link of upper hop relay station so; Relay station 2b also obtains its upper hop relay station to the communication quality of the up path of base station 3a.By that analogy, under other network topology structures, if relay station 2b comprises a plurality of relay stations to base station 3a, according to above-mentioned method, relay station 2b finally can obtain it to the communication quality information of the uplink communication path of affiliated base station 3a.

Then, in step S202 ', relay station 2a is according to L ₂' and L ₁' communication quality information, obtain this relay station 2a through the relay station 2b uplink communication path L to base station 3a ₂'-L ₁' communication quality information.

In a preferred embodiment, relay station 2a passes through L ₂'-L ₁' path regard as one by base station 3 directly to the virtual link P of this relay station 2a ₂₁', and weigh this virtual link P with the equivalent path quality of equivalent spectrum efficiency or equivalent SINR and so on ₂₁' communication quality.

Obtain relay station 2a with step S200 ' to S202 ' and obtain that it is incoherent to the communication quality information of the uplink communication path of base station 3a via relay station 2b, in step S203 ', relay station 2a obtains this relay station to the up link L of base station 3a ₃' communication quality information.Concrete acquisition methods and above method are similar.Preferably, base station 3a obtains L according to the distance measurement request of relay station 2a ₃' communication quality information, and provide it to relay station 2a.In another case, relay station 2a also can obtain according to base station 3a the communication quality of this down link to the downstream signal of relay station 2a, and estimates to obtain corresponding up link L with this ₃' communication quality.Preferably, L ₃' communication quality information characterized by spectrum efficiency.

Then, in step S21 ', relay station 2a is according to the uplink communication path L of this relay station 2a to base station 3a ₂'-L ₁' and L ₃' communication quality information, from L ₂'-L ₁' and L ₃' in selected communication quality more excellent or two uplink communication path be that base station 3 is to the uplink communication path of this relay station 2a.

Then, in step S22 ', relay station 2a will select the relevant information of one or two more excellent uplink communication path, path topology structure for example, and the communication quality informations in path etc. offer portable terminal 1 in the mode of for example broadcasting.For example, the relevant information of the more excellent uplink communication path L2 ' of relay station 2a-L1 ' offers portable terminal 1.

Then in step S101 ', portable terminal 1 receives relay station 2a that the relay station 2a from relay station 2a selects to the more excellent uplink communication path L of base station 3a ₂'-L ₁' relevant information.

It should be noted that above step S100 ' and step S101 ' do not have strict ordinal relation.

Then, in step S102 ', portable terminal 1 is according to the uplink communication path L that obtains in step S101 ' ₂'-L ₁' communication quality, with the up link L that gets access among the step S100 ₅' communication quality, determine that this portable terminal 1 is to the available uplink communication path L of base station 3a ₅'-L ₂'-L ₁' communication quality.

Further, because portable terminal 1 also is in the coverage of base station 3b of residential quarter B, in step S11 ', portable terminal 1 obtains this portable terminal 1 to the available uplink communication path L of base station 3b ₄' communication quality information.Concrete obtain manner and said method are similar.

It should be noted that above step S11 ' and step S10 ' do not have strict ordinal relation.

Then, in step S12 ', portable terminal 1 is according to the uplink communication path L of this portable terminal 1 that gets access in step S10 ' to base station 3a ₅'-L ₂'-L ₁' communication quality, with the uplink communication link L of the base station 3b that gets access among the step S11 ' to portable terminal 1 ₄' communication quality, therefrom select the uplink communication path of the access to wireless communication network of more excellent this portable terminal of conduct 1 of communication quality.

Preferably, in step S13 ', portable terminal 1 reports the relevant information of uplink communication path selected among the step S12 ' to this selected base station corresponding to uplink communication path, and asks this uplink communication path of this base station to distribute to this portable terminal 1 and use.

Above specific embodiment according to systems approach of the present invention is described in detail.Below will the specific embodiment of the present invention be described in detail from the angle of system and device.

The 3rd embodiment

Fig. 3 shows according to another specific embodiment of the present invention, and portable terminal 1 is at the auxiliary lower block diagram of selecting the device in more excellent downlink communication path of relay station 2a in the wireless relay network shown in Figure 1.

The below is with reference to Fig. 2 and Fig. 3, to according to the present invention, as the device in the selecting base station of mobile terminal of base station opposite equip. and the downlink communication path between this portable terminal, and select the device in the downlink communication path between base station and this portable terminal to describe in detail as the relay station auxiliary moving terminal of base station opposite equip..

In the present embodiment, portable terminal 1 comprises for the device 10 of selecting the communication path between base station and this portable terminal 1, wherein, comprises the first deriving means 100, choice device 101 and report device 102.The first deriving means 100 comprises the second deriving means 1000 and definite device 1001, and the 7th deriving means 1002; The second deriving means 1000 comprises the 3rd deriving means 10000 and the 4th deriving means 10001.Relay station 2a comprises for selecting auxiliary moving terminal 1 to select the device 20 of the communication path between base station and the portable terminal 1, wherein, comprises the first deriving means 200, choice device 201 and generator 202; The first deriving means 200 comprises the second deriving means 2000 and definite device 2001, and the 7th deriving means 2002; The second deriving means 2000 comprises the 3rd deriving means 20000 and the 4th deriving means 20001.

At first, the second deriving means 1000 of portable terminal 1 obtains base station 3a to the communication quality information in the available downlink communication path of this portable terminal.

Concrete, the 3rd deriving means 10000 obtains its relay station 2a of direct covering to the down link L of this portable terminal 1 ₅Communication quality information.In a preferred embodiment, relay station 2a sends broadcast singal in the zone of its covering, and this broadcast singal comprises leading symbol (preamble) etc.Relay station 2a can according to its broadcast singal from relay station 2b that receives, obtain L ₂Communication quality information.For instance, preferred, portable terminal is measured communication quality information according to leading symbol; After perhaps carrying out synchronously according to leading symbol, from this broadcast singal, extract pilot tone (pilot) information, thereby calculate L ₅The path loss of link (Path loss), spectrum efficiency (frequency efficiency), the multiple information for weighing communication quality such as Signal to Interference plus Noise Ratio (SINR).In another embodiment, the downlink data signal (DL burst) that portable terminal also can send in its jurisdiction district according to relay station 2a obtains L ₂Communication quality information.It will be understood by those skilled in the art that portable terminal can also use additive method, obtain relay station to the communication quality of its down link, concrete acquisition methods is not that the present invention will discuss.For example, in symmetric channel, higher level's network equipment of relay station can be estimated this higher level network equipment to the communication quality of the down link of this relay station according to the communication quality of relay station to the up link of this higher level network equipment, and provides it to this relay station.

The 4th deriving means 10001 obtains the affiliated base station 3a of relay station 2a to the communication quality information in the one or more downlink communication path of relay station 2a.In a preferred embodiment, portable terminal 1 is at the auxiliary lower communication quality information in one or more downlink communication path that obtains of relay station 2a.

Concrete, the first deriving means 200 of relay station 2a get access to base station 3a to the communication quality information in the one or more downlink communication path of this relay station 2a.

Wherein, the 3rd deriving means 20000 of the second deriving means 2000 of the first deriving means 200 gets access to relay station 2b to the down link L of this relay station 2a ₂Communication quality information.Preferably, obtain L with above-mentioned portable terminal 1 ₅The process of communication quality information similar, relay station 2a can obtain L according to the broadcast singal of relay station 2b ₂Communication quality information.In another example, relay station 2a had before measured and had preserved L ₂Communication quality information, relay station 2a can obtain L from the data of preserving so ₁Communication quality information.

Then, the 4th deriving means 20001 obtains the affiliated base station 3a of relay station 2b to the downlink communication link L of relay station 2b ₁Communication quality information.In a preferred embodiment, relay station 2b can get access to base station 3a to the down link L of relay station 2b ₁Communication quality information, and with this information with for example broadcasting mode offer relay station 2a.Wherein, in the present embodiment, relay station 2b can measure L to the downstream signal of this relay station 2b according to base station 3a ₁Communication quality information.Under other network topology structure, if relay station 2b is to also having a relay station between the 3a of base station, relay station 2b obtains its upper hop relay station to the communication quality information of the down link of relay station 2b so, preferably, also use above-mentioned process, measure the communication quality of this down link according to the upper hop relay station to the downstream signal of relay station 2b; Relay station 2b also obtains the affiliated base station 3a of its upper hop relay station to the communication quality of the downlink path of its upper hop relay station, preferably, the upper hop relay station can get access to base station 3a to the communication quality information of the down link of upper hop relay station to the downlink signal quality of upper hop relay station according to base station 3a, and this information is offered relay station 2b in the mode of for example broadcasting.By that analogy, under other network topology structures, if relay station 2b comprises a plurality of relay stations to base station 3a, according to above-mentioned process, relay station 2b finally can get access to its affiliated base station 3a to the communication quality information of the communication path of this relay station 2b.

Then, determine that device 2001 is according to L ₁With L ₂Communication quality information, obtain base station 3a through the relay station 2b downlink communication path L to this relay station 2a ₁-L ₂Communication quality information.

In a preferred embodiment, relay station 2a passes through L ₁-L ₂The path regard as one by base station 3a directly to the virtual link P of this relay station 2a ₁₂, and weigh this virtual link P with the equivalent path quality ₁₂Communication quality.For instance, L ₁With L ₂Communication quality respectively with spectrum efficiency η ₁With η ₂(unit: bps/hertz, bits/s/Hz) characterizing, the equivalent path quality can be virtual link P so ₁₂Spectrum efficiency η ₁₂, relay station 2a can use following formula to calculate η ₁₂:

η ₁₂＝η ₁×η ₂/η ₁+η ₂ (1)

It should be noted that this formula only is for example, is not the unique formula that calculates equivalent spectrum efficiency.For example, can also be to η in this formula ₁Or η ₂Be weighted.In another example, L ₁With L ₂Communication quality characterize with its SINR, then relay station 2a can obtain according to SINR the channel capacity maximum of its corresponding down link by shannon formula, then again in conjunction with the modulation system of the signal transmission on this down link obtain on this link message transmission rate (bps), pass through again L ₁With L ₂Message transmission rate separately can obtain virtual link P ₁₂Message transmission rate, this message transmission rate just be can be used as virtual link P ₁₂The equivalent path quality.

To determine that relay station 2a obtain base station 3a incoherent to the communication quality information in the downlink communication path of relay station 2a via relay station 2b with the second deriving means 2000 and definite device 2001, and the 7th deriving means 2002 obtains base station 3a to the down link L of this relay station ₃Communication quality information.It is similar to the process of relay station 2a that concrete acquisition process and above relay station 2a obtain relay station 2b.Preferably, the 7th deriving means 2002 can obtain L according to the broadcast singal of base station 3a ₃Communication quality information.Preferably, L ₃Communication quality information by spectrum efficiency η ₃Characterize.

Then, choice device 201 is according to the downlink communication path L of base station 3a to this relay station 2a ₁-L ₂With L ₃Communication quality information, from P ₁₂With L ₃In selected communication quality more excellent or two downlink communication paths be that base station 3a is to the downlink communication path of this relay station 2a.

Then, generator 202 will be selected the relevant information in one or two more excellent downlink communication path, path topology structure for example, and the communication quality informations in path etc. offer portable terminal 1 in the mode of for example broadcast.In a kind of situation, relay station 2a need to provide an alternative downlink communication path to portable terminal 1, and that relay station 2a then will be logical to portable terminal 1 than the relevant information of shortest path; In the another kind of situation, relay station 2a need to provide many alternative downlink communication paths to portable terminal 1, and this relay station 2a can offer portable terminal 1 with the relevant information of two paths so.In the present embodiment, relay station 2a need to provide an alternative downlink communication path to portable terminal 1, and L ₁-L ₂Spectrum efficiency η ₁₂Compare L ₃Spectrum efficiency η ₃Height, then relay station 2a is then with L ₁-L ₂Relevant information logical to portable terminal 1.In one case, L ₁-L ₂Relevant information in communication quality represent with the equivalent path quality; In another case, relay station 2a is respectively with L ₁With L ₂Communication quality offer portable terminal 1.

Then receive base station 3a that the relay station 2a from relay station 2a selects to the more excellent downlink communication path L of relay station 2a at the 4th deriving means 10001 ₁-L ₂Relevant information.

Operation that it should be noted that above the 3rd deriving means 10000 and the 4th deriving means 10001 does not have strict ordinal relation.

Then, determine that device 1001 is according at downlink communication path L that the 4th deriving means 10001 obtains ₁-L ₂Communication quality, the down link L that gets access to the 3rd deriving means 10000 ₅Communication quality, determine that base station 3a is to the available downlink communication path L of this portable terminal 1 ₁-L ₂-L ₅Communication quality.In one embodiment, L ₁-L ₂Communication quality and L ₅Communication quality respectively with spectrum efficiency η ₁₂And η ₅Characterize, then portable terminal 1 can calculate downlink communication path L according to the mode that is similar to formula (1) ₁-L ₂-L ₅Spectrum efficiency.For example:

η ₁₂₅＝η ₁₂×η ₅/η ₁₂+η ₅ (2)

Further, because portable terminal 1 also is in the coverage of base station 3b of residential quarter B, the 7th deriving means 1002 obtains base station 3b to the communication quality information in the available downlink communication path of this portable terminal 1.Preferably, similar with aforesaid mode, portable terminal 1 determines that according to the downstream signal from base station 3b base station 3b is to the downlink communication link L of portable terminal 1 ₄Communication quality information.

It should be noted that above the 7th deriving means 1002, do not have strict ordinal relation with the second deriving means 1000 with definite device 1001.

Then, the base station 3a that determines according to the second deriving means 1000 and definite device 1001 of choice device 101 is to the downlink communication path L of this portable terminal 1 ₁-L ₂-L ₅Communication quality, the base station 3b that gets access to the 7th deriving means 1002 is to the downlink communication link L of portable terminal 1 ₄Communication quality, therefrom select the downlink communication path of the access to wireless communication network of more excellent this portable terminal of conduct 1 of communication quality.

Preferably, report device 102 reports the relevant information in the downlink communication path that choice device 101 is selected to this selected base station corresponding to downlink communication path, and asks this downlink communication path allocation of this base station to be used to this portable terminal 1.

Like this, portable terminal 1 can get access to the situation of each the bar alternative path in the different districts, thereby can make more excellent selection in the alternative path of different districts.This is in the prior art, cann't be solved when being selected by the base station of only knowing the path situation in this residential quarter.

It will be understood by those skilled in the art that the present invention is not only applicable to portable terminal at access or access of radio network or stride the residential quarter or minizone when switching again, select and the base station between more excellent communication path; Also be applicable to relay station at access or access of radio network or stride the residential quarter or minizone when switching again, select and the base station between more excellent communication path.

The 4th embodiment

In a further embodiment, portable terminal 1 also will be selected the more excellent uplink communication path to the base station.

In one case, what this cordless communication network was similar to that the applicant proposes in the background technology in the discussion of the IEEE 802.16m in March, 2008 draft gets access to portable terminal to the communication quality of the up path of this base station by the base station, so a plurality of base stations generals this portable terminal separately to the uplink communication quality of this base station offers this portable terminal, portable terminal contains be used for to select the first deriving means 100 of the device 10 of the communication path between base station and this portable terminal 1 to receive the uplink communication quality of the corresponding uplink communication path that a plurality of base stations provide, and then its choice device 101 is the suitable access uplink communication path of this mobile terminal self selection.

In another case, this cordless communication network uses the communication mode such as the up-downgoing channel symmetry of TDD (time division duplex) to carry out uplink and downlink communication, and the communication quality in the communication quality of uplink communication path and downlink communication path is essentially identical so.Then be similar to the 3rd embodiment, the second deriving means 1000 can use similar method, get access to base station 3a to the communication quality information in the downlink communication path separately of this portable terminal 1, the 7th deriving means 1002 obtains this portable terminal 1 to the communication quality of the uplink communication path of base station 3b, determines that 1001 definite these portable terminals 1 of device are to the communication quality of the uplink communication path of base station 3a and 3b.Then, choice device 101 is according to the communication quality of this portable terminal 1 to the uplink communication path separately of base station 3a and base station 3b, and therefrom a selected more excellent uplink communication path of communication quality is that portable terminal 1 is to the uplink communication path of base station.Report device 102 reports the relevant information of the uplink communication path that choice device 101 is selected to this selected base station corresponding to uplink communication path, and asks this uplink communication path of this base station to distribute to this portable terminal 1 and use.Those skilled in the art can understand, in up-downgoing channel asymmetric system, if pass through downlink communication quality, can estimate in a certain way more accurately uplink communication quality, and so above situation also can be suitable for.

In another situation, this cordless communication network uses the asymmetrical communication mode of up-downgoing channel such as FDD (Frequency Division Duplexing (FDD)) to carry out uplink and downlink communication.Portable terminal 1 oneself obtains the communication quality information of uplink communication path.

In this case, portable terminal 1 comprises for the device 10 of selecting the communication path between base station and this portable terminal 1, wherein, comprises the first deriving means 100 ', choice device 101 ' and report device 102 '.The first deriving means 100 ' comprises the second deriving means 1000 ' and definite device 1001 ', and the 7th deriving means 1002 '.The second deriving means 1000 ' comprises the 5th deriving means 10000 ' and the 6th deriving means 10001 '.Relay station 2a comprises for selecting auxiliary moving terminal 1 to select the device 20 of the communication path between base station and the portable terminal 1, wherein, comprises the first deriving means 200 ', choice device 201 ' and generator 202 '; The first deriving means 200 ' comprises the second deriving means 2000 ' and definite device 2001 ', and the 7th deriving means 2002 '; The second deriving means 2000 ' comprises the 5th deriving means 20000 ' and the 6th deriving means 20001 '.

Concrete, the second deriving means 1000 ' of portable terminal 1 obtains this portable terminal to the communication quality information of the available uplink communication path of base station 3a.

Concrete, the 5th deriving means 10000 ' obtains it to the up link L that directly covers its relay station 2a ₅' communication quality information.Preferably, relay station 2a according to portable terminal 1 send such as upward signals such as distance measurement request, record L ₅' communication quality, and with this quality with for example broadcasting mode offer portable terminal 1.In another example, portable terminal 1 also can be fixed line link L really according to the leading symbol that relay station 2b sends ₅Communication quality, and according to L ₅Communication quality infer L ₅' communication quality.

And the 6th deriving means 10001 ' obtains relay station 2a to the communication quality information of the uplink communication path of base station 3a.In a preferred embodiment, portable terminal 1 obtains relay station 2a to the communication quality information of the uplink communication path of base station 3a at the auxiliary lower of relay station 2a.

Concrete, the first deriving means 200 ' of relay station 2a obtains the communication quality of its uplink communication path of 3 to the base station.

Wherein, the 5th deriving means 20000 ' of the second deriving means 2000 ' gets access to this relay station 2a to the up link L of relay station 2b ₂' communication quality information.Preferably, obtain L with above-mentioned portable terminal 1 ₅' the method for communication quality information similar, relay station 2b can obtain L according to the distance measurement request of relay station 2a ₂' communication quality information, and will and with this quality with for example broadcasting mode offer relay station 2a.In another example, relay station 2a also can fix line link L really according to the leading symbol that relay station 2b sends ₂Communication quality, and according to L ₂Communication quality infer L ₂' communication quality.

The 6th deriving means 20001 ' obtains the uplink communication link L of the base station 3a of relay station 2b under the relay station 2b ₁' communication quality information.In a preferred embodiment, relay station 2b can get access to relay station 2b to the up link L of base station 3a ₁' communication quality information, and with this information with for example broadcasting mode offer relay station 2a.Wherein, in the present embodiment, with aforesaid method, base station 3a can measure L according to the upward signal of relay station 2b ₁' communication quality information, and this information offered relay station 2b.Under other network topology structure, if relay station 2b is to also having a relay station between the 3a of base station, relay station 2b obtains it to the communication quality information of the up link of upper hop relay station so; Relay station 2b also obtains its upper hop relay station to the communication quality of the up path of base station 3a.By that analogy, under other network topology structures, if relay station 2b comprises a plurality of relay stations to base station 3a, according to above-mentioned method, relay station 2b finally can obtain it to the communication quality information of the uplink communication path of affiliated base station 3a.

Then, determine that device 2001 ' is according to L ₂' and L ₁' communication quality information, obtain this relay station 2a through the relay station 2b uplink communication path L to base station 3a ₂'-L ₁' communication quality information.

In a preferred embodiment, relay station 2a passes through L ₂'-L ₁' path regard as one by base station 3 directly to the virtual link P of this relay station 2a ₂₁', and weigh this virtual link P with the equivalent path quality of equivalent spectrum efficiency or equivalent SINR and so on ₂₁' communication quality.

Determine that with the second deriving means 2000 ' and definite device 2001 ' relay station 2a obtains that it is incoherent to the communication quality information of the uplink communication path of base station 3a via relay station 2b, the 7th deriving means 2002 ' obtains this relay station to the up link L of base station 3a ₃' communication quality information.Concrete acquisition methods and above method are similar.Preferably, base station 3a obtains L according to the distance measurement request of relay station 2a ₃' communication quality information, and provide it to relay station 2a.In another case, the 7th deriving means 2002 ' also can obtain according to base station 3a the communication quality of this down link to the downstream signal of relay station 2a, and estimates to obtain corresponding up link L with this ₃' communication quality.Preferably, L ₃' communication quality information characterized by spectrum efficiency.

Then, choice device 201 ' is according to the uplink communication path L of this relay station 2a to base station 3a ₂'-L ₁' and L ₃' communication quality information, from L ₂'-L ₁' and L ₃' in selected communication quality more excellent or two uplink communication path be that base station 3 is to the uplink communication path of this relay station 2a.

Then, generator 202 ' will be selected the relevant information of one or two more excellent uplink communication path, path topology structure for example, and the communication quality informations in path etc. offer portable terminal 1 in the mode of for example broadcasting.For example, the more excellent uplink communication path L of relay station 2a ₂'-L ₁' relevant information offer portable terminal 1.

Then the 4th deriving means 10001 ' receives relay station 2a that the relay station 2a from relay station 2a selects to the more excellent uplink communication path L of base station 3a ₂'-L ₁' relevant information.

It should be noted that above the 3rd deriving means 10000 ' and the 4th deriving means 10001 ' do not have strict ordinal relation.

Then, determine the uplink communication path L that device 1001 ' obtains according to the 4th deriving means 10001 ' ₂'-L ₁' communication quality, the up link L that gets access to the 3rd deriving means 10000 ' ₅' communication quality, determine that this portable terminal 1 is to the available uplink communication path L of base station 3a ₅'-L ₂'-L ₁' communication quality.

Further, because portable terminal 1 also is in the coverage of base station 3b of residential quarter B, the 7th deriving means 1002 ' obtains this portable terminal 1 to the available uplink communication path L of base station 3b ₄' communication quality information.Concrete obtain manner and said method are similar.

It should be noted that above the 7th deriving means 1002 ', do not have strict ordinal relation with the second deriving means 1000 ' with definite device 1001 '.

Then, this portable terminal 1 of determining according to the second deriving means 1000 ' and definite device 1001 ' of choice device 101 ' is to the uplink communication path L of base station 3a ₅'-L ₂'-L ₁' communication quality, with the uplink communication link L of the base station 3b that gets access in the 7th deriving means 1002 ' to portable terminal 1 ₄' communication quality, therefrom select the uplink communication path of the access to wireless communication network of more excellent this portable terminal of conduct 1 of communication quality.

Preferably, report device 102 ' relevant information of uplink communication path selected in the choice device 101 ' is reported to this selected base station corresponding to uplink communication path, and ask this uplink communication path of this base station to distribute to this portable terminal 1 and use.

Above specific embodiments of the invention are described, it will be appreciated that, the present invention is not limited to above-mentioned specific execution mode, and those skilled in the art can make various typings and modification within the scope of the appended claims.

Claims (33)

1. method of be used for selecting the communication path between base station and this base station opposite equip. in the opposite equip. of the base station of cordless communication network wherein, may further comprise the steps:

I. obtain the communication quality information of corresponding many available communication paths between a plurality of base stations and described this base station opposite equip.;

Ii. according to the communication quality information of corresponding many available communication paths between described a plurality of base stations and described this base station opposite equip., therefrom selecting one or more more excellent available communication path of communication quality is selected communication path between base station and described this base station opposite equip.;

Wherein, described cordless communication network comprises wireless relay network, and described step I further comprises:

I1. when described this base station opposite equip. by one or more related relay devices institute directly during covering, obtain the communication quality information of one or more corresponding communication link between described one or more related relay device and described this base station opposite equip., and obtain described one or more related relay device under separately relevant base station and the communication quality information of corresponding one or more communication path between described one or more related relay device;

I2. according to the communication quality information of one or more corresponding communication link between described one or more related relay devices and described this base station opposite equip., with described one or more related relay devices under separately relevant base station and the communication quality information of corresponding one or more communication path between described one or more related relay device, determine the communication quality information of corresponding one or more available communication path between described relevant base station and described this base station opposite equip..

2. method according to claim 1 is characterized in that, described step I 1 further comprises:

A. obtain described one or more related relay device to the communication quality information of one or more corresponding downlink communication link of described this base station opposite equip.;

Also comprise:

B. obtain the separately communication quality information in affiliated relevant base station to the corresponding one or more downlink communication path between described one or more related relay devices of described one or more related relay device;

Described step I 2 further comprises:

-according to the communication quality information of described one or more related relay devices to one or more corresponding downlink communication link of described this base station opposite equip., with the communication quality information in the relevant base station of described one or more related relay devices under separately to the corresponding one or more downlink communication path between described one or more related relay devices, determine the communication quality information of corresponding one or more available descending and/or uplink communication path between described relevant base station and described this base station opposite equip..

3. method according to claim 2 is characterized in that, described step a comprises:

-according to the downstream signal from described one or more related relay devices, determine that described one or more related relay device is to the communication quality information of the corresponding downlink communication link of described this base station opposite equip..

4. according to claim 2 or 3 described methods, it is characterized in that, described step b comprises:

-receive from described one or more related relay devices, the downlink communication quality information in the relevant base station under the corresponding trunking to one or more corresponding downlink communication path of corresponding related relay device.

5. method according to claim 1 is characterized in that, described step I 1 further comprises:

A '. obtain described this base station opposite equip. to the communication quality information of one or more corresponding uplink communication link of described one or more related relay devices;

Also comprise:

B '. obtain described one or more related relay device to the communication quality information of corresponding one or more uplink communication path of the relevant base station of described one or more related relay devices under separately;

Described step I 2 further comprises:

-according to the communication quality information of described this base station opposite equip. to one or more corresponding uplink communication link of described one or more related relay devices, with the communication quality information of described one or more related relay devices to corresponding one or more uplink communication path of the relevant base station of described one or more related relay devices under separately, determine the communication quality information in corresponding one or more available up and/or downlink communication path between described relevant base station and described this base station opposite equip..

6. method according to claim 5 is characterized in that, described step a ' comprising:

-according to the downstream signal from described one or more related relay devices, determine that described one or more related relay device is to the communication quality information of the corresponding uplink communication link of described this base station opposite equip..

7. according to claim 5 or 6 described methods, it is characterized in that, described step b ' comprising:

-receive from described one or more related relay devices, corresponding related relay device is to the communication quality information of corresponding one or more uplink communication path of the relevant base station of described one or more related relay devices under separately.

8. each described method in 3 according to claim 1 is characterized in that, described step I further comprises:

I1 '. standing erectly when one or more dependency basis connects when covering described this base station opposite equip., obtains the communication quality information of corresponding one or more communication link between described one or more relevant base station and described this base station opposite equip..

9. method according to claim 8 is characterized in that, in the described step I 1 ', further comprises:

-according to the downstream signal separately from one or more relevant base stations of described this base station opposite equip. of described direct covering, determine that described one or more relevant base station is to the communication quality information of corresponding one or more of described this base station opposite equip. available downlink communication link.

10. method according to claim 8 is characterized in that, in the described step I 1 ', further comprises:

-receive from one or more relevant base stations of described this base station opposite equip. of described direct covering, relevant base station is to the communication quality information of the corresponding one or more uplink communication link of described this base station opposite equip. accordingly.

11. each described method in 3 is characterized in that according to claim 1, described base station opposite equip. comprises trunking or portable terminal.

12. method according to claim 11 is characterized in that, the method is further comprising the steps of:

Iii. the relevant information of described selected communication path is reported to base station corresponding to described selected downlink communication path, perhaps the present affiliated base station of this base station opposite equip..

13. each described method in 3 is characterized in that according to claim 1, described base station opposite equip. comprises trunking, and described step I also comprises:

-obtain the communication quality information of corresponding one or more available communication path between base station under this trunking and described the trunking;

Described step I i also comprises:

-according to the communication quality information of corresponding one or more available communication path between the base station under described the trunking and described the trunking, therefrom selecting one or more more excellent available communication path of communication quality is base station under described the trunking and the selected communication path between described trunking;

The method is further comprising the steps of:

Iii '. the relevant information of described selected communication path is offered the base station opposite equip. that this trunking directly covers.

14. each described method in 3 is characterized in that according to claim 1, described communication quality information comprises the equivalent path quality information of the communication path that it is corresponding.

15. method according to claim 14 is characterized in that, described equivalent path quality information comprises equivalent spectrum efficiency, and/or equivalent signal and noise plus interference ratio.

16. each described method in 3 is characterized in that according to claim 1, described cordless communication network comprises the WiMAX network.

17. a device that is used for selecting the communication path between base station and this base station opposite equip. in the opposite equip. of the base station of cordless communication network, described base station opposite equip. comprises that trunking wherein, comprising:

The-the first deriving means is for the communication quality information that obtains corresponding many available communication paths between one or more base stations and described this base station opposite equip.;

-choice device, be used for the communication quality information according to corresponding many available communication paths between described one or more base stations and described this base station opposite equip., therefrom selecting many more excellent available communication paths of communication quality is selected communication path between base station and described this base station opposite equip.;

-generator is used for the relevant information of many described selected communication paths is offered the base station opposite equip. that this trunking directly covers.

18. device according to claim 17 is characterized in that, described cordless communication network comprises wireless relay network, and described the first deriving means further comprises:

The-the second deriving means, be used for when described this base station opposite equip. by one or more related relay devices institute directly during covering, obtain the communication quality information of one or more corresponding communication link between described one or more related relay device and described this base station opposite equip., and obtain described one or more related relay device under separately relevant base station and the communication quality information of corresponding one or more communication path between described one or more related relay device;

-determine device, be used for the communication quality information according to one or more corresponding communication link between described one or more related relay devices and described this base station opposite equip., with described one or more related relay devices under separately relevant base station and the communication quality information of corresponding one or more communication path between described one or more related relay device, determine the communication quality information of corresponding one or more available communication path between described relevant base station and described this base station opposite equip..

19. device according to claim 18 is characterized in that, described the second deriving means further comprises:

-Di three deriving means are used for obtaining described one or more related relay device to the communication quality information of one or more corresponding downlink communication link of described this base station opposite equip.;

Also comprise:

-Di four deriving means are used for obtaining the separately communication quality information in affiliated relevant base station to the corresponding one or more downlink communication path between described one or more related relay devices of described one or more related relay device;

Described definite device also is used for:

-according to the communication quality information of described one or more related relay devices to one or more corresponding downlink communication link of described this base station opposite equip., with the communication quality information in the relevant base station of described one or more related relay devices under separately to the corresponding one or more downlink communication path between described one or more related relay devices, determine the communication quality information of corresponding one or more available descending and/or uplink communication path between described relevant base station and described this base station opposite equip..

20. device according to claim 19 is characterized in that, described the 3rd deriving means also is used for:

-according to the downstream signal from described one or more related relay devices, determine that described one or more related relay device is to the communication quality information of the corresponding downlink communication link of described this base station opposite equip..

21. according to claim 19 or 20 described devices, it is characterized in that, described the 4th deriving means also is used for:

-receive from described one or more related relay devices, the downlink communication quality information in the relevant base station under the corresponding trunking to one or more corresponding downlink communication path of corresponding related relay device.

22. device according to claim 18 is characterized in that, described the second deriving means further comprises:

-Di five deriving means are used for obtaining described this base station opposite equip. to the communication quality information of one or more corresponding uplink communication link of described one or more related relay devices;

Also comprise:

-Di six deriving means are used for obtaining described one or more related relay device to the communication quality information of corresponding one or more uplink communication path of the relevant base station of described one or more related relay devices under separately;

Described definite device also is used for:

-according to the communication quality information of described this base station opposite equip. to one or more corresponding uplink communication link of described one or more related relay devices, with the communication quality information of described one or more related relay devices to corresponding one or more uplink communication path of the relevant base station of described one or more related relay devices under separately, determine the communication quality information in corresponding one or more available up and/or downlink communication path between described relevant base station and described this base station opposite equip..

23. device according to claim 22 is characterized in that, described the 5th deriving means also is used for:

-according to the downstream signal from described one or more related relay devices, determine that described one or more related relay device is to the communication quality information of the corresponding uplink communication link of described this base station opposite equip..

24. according to claim 22 or 23 described devices, it is characterized in that, described the 6th deriving means also is used for:

-receive from described one or more related relay devices, corresponding related relay device is to the communication quality information of corresponding one or more uplink communication path of the relevant base station of described one or more related relay devices under separately.

25. each described device in 20 is characterized in that according to claim 17, described the second deriving means further comprises:

-Di seven deriving means are used for standing erectly when connecing described this base station of covering opposite equip. when one or more dependency basis, obtain the communication quality information of corresponding one or more communication link between described one or more relevant base station and described this base station opposite equip..

26. device according to claim 25 is characterized in that, described the 7th deriving means also is used for:

-according to the downstream signal separately from one or more relevant base stations of described this base station opposite equip. of described direct covering, determine that described one or more relevant base station is to the communication quality information of corresponding one or more of described this base station opposite equip. available downlink communication link.

27. device according to claim 26 is characterized in that, described the 7th deriving means also is used for:

-receive from one or more relevant base stations of described this base station opposite equip. of described direct covering, relevant base station is to the communication quality information of the corresponding one or more uplink communication link of described this base station opposite equip. accordingly.

28. each described device in 20 is characterized in that according to claim 17, described base station opposite equip. comprises trunking or portable terminal.

29. device according to claim 28 is characterized in that, also comprises:

-report device, be used for the relevant information of described selected communication path is reported to base station corresponding to described selected downlink communication path, perhaps the present affiliated base station of this base station opposite equip..

30. each described device in 20 is characterized in that according to claim 17, described communication quality information comprises the equivalent path quality information of the communication path that it is corresponding.

31. device according to claim 30 is characterized in that, described equivalent path quality information comprises equivalent spectrum efficiency, and/or equivalent signal and noise plus interference ratio.

32. each described device in 20 is characterized in that according to claim 17, described cordless communication network comprises the WiMAX network.

33. the base station opposite equip. of a cordless communication network is characterized in that, comprises according to claim 17 each described device in 32.

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