WO2010000091A1 - 无线网络中基站对端设备选择通信路径的方法这装置 - Google Patents

无线网络中基站对端设备选择通信路径的方法这装置 Download PDF

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Publication number
WO2010000091A1
WO2010000091A1 PCT/CN2008/001252 CN2008001252W WO2010000091A1 WO 2010000091 A1 WO2010000091 A1 WO 2010000091A1 CN 2008001252 W CN2008001252 W CN 2008001252W WO 2010000091 A1 WO2010000091 A1 WO 2010000091A1
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WO
WIPO (PCT)
Prior art keywords
base station
communication
quality information
communication quality
relay devices
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Application number
PCT/CN2008/001252
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English (en)
French (fr)
Inventor
沈钢
徐朝军
Original Assignee
上海贝尔阿尔卡特股份有限公司
阿尔卡特朗讯
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 上海贝尔阿尔卡特股份有限公司, 阿尔卡特朗讯 filed Critical 上海贝尔阿尔卡特股份有限公司
Priority to CN200880129437.8A priority Critical patent/CN102047725B/zh
Priority to PCT/CN2008/001252 priority patent/WO2010000091A1/zh
Publication of WO2010000091A1 publication Critical patent/WO2010000091A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W40/00Communication routing or communication path finding
    • H04W40/02Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/12Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality

Definitions

  • the present invention relates to a method and apparatus for selecting a communication path based on a wireless communication network, and more particularly to a base station peer device in a wireless communication network.
  • base station peer devices such as relay stations or mobile terminals
  • the plurality of alternative access stations i.e., multiple relay stations and/or base stations, may belong to different cells respectively. Therefore, when the base station peer device accesses or re-accesses the wireless network, it should be able to access from the preferred one of the candidate access stations, and connect to the base station of the corresponding cell through a better communication path. .
  • How to quickly and efficiently select the communication path with better communication quality between the base station and the base station peer device is a key problem that must be solved in the wireless multi-hop network.
  • the communication path includes a downlink communication path between the base station and the peer device of the base station, and an uplink communication path between the base station peer device and the base station.
  • the mobile terminal acquires the downlink communication quality information of the previous hop relay station to the mobile terminal. And feeding back the information back to the base station; the last hop relay station also obtains downlink communication quality information of the uplink network device to the relay station, and also feeds the information back to the base station; and so on, the final base station will obtain the base station All links to the downlink communication path to the mobile terminal
  • the quality information is trusted, and based on the information, the mobile terminal determines a preferred downlink communication path from the base station to the mobile terminal.
  • the previous hop relay station of the mobile terminal acquires the communication quality information of the uplink communication link of the mobile terminal to the base station, and feeds the information back to the base station; the upper device of the last hop network device also uses the previous hop.
  • the communication quality information of the uplink communication link of the network device to the device is reported to the base station; in this way, the final base station obtains the communication quality information of all links in the uplink communication path of the mobile terminal to the base station, and according to these The information determines, for the mobile terminal, a preferred uplink communication path from the base station to the mobile terminal.
  • the mobile terminal and each relay station report the communication quality information of each link to the base station, which consumes certain resources and causes additional delay;
  • the base station of the different cell can only know the preferred path of the mobile terminal in the cell under the jurisdiction of the base station, and cannot learn other cells. In the case of an alternate path, it is not possible to determine a better access site for the mobile terminal. Summary of the invention
  • the present invention proposes a method for selecting a communication path between a base station peer device and a base station for a base station peer device in a wireless communication network.
  • the base station peer device itself obtains communication quality information of one or more hops of available communication paths between the peer device of the base station and the candidate base station, and then selects the communication quality from the one or more available communication paths.
  • the communication path between the selected network device and the base station is not limited to, the base station peer device, and the base station peer device.
  • a method for selecting a communication path between a base station and a peer device of the base station in a base station peer device of the wireless communication network includes the following steps: Communication quality information of one or more available communication paths between one or more base stations and the base station peer device; ii. according to the one or more base stations and the base station opposite to the base station Communication quality information of a corresponding one or more available communication paths between the devices, from which one or more available communication paths with better communication quality are selected as selected channels between the base station and the peer device of the base station Letter path.
  • an apparatus for selecting a communication path between a base station and a peer device of the base station in a base station peer device of the wireless communication network includes: a first acquiring device, Obtaining communication quality information of a corresponding one or more available communication paths between one or more base stations and the base station peer device; selecting means for determining the one or more base stations and stations Decoding the communication quality information of the corresponding one or more available communication paths between the peer devices of the base station, and selecting one or more available communication paths with better communication quality as the base station and the peer device of the base station The selected communication path between.
  • the base station peer device is a relay device or a mobile terminal, when it enters or re-enters the wireless communication network, it reports relevant information of the selected communication path to the base station corresponding to the selected communication path, so that The base station allocates the corresponding communication path to the peer device of the base station; when it performs the cell handover, it reports the related information of the selected communication path to the base station to which the peer device of the base station currently belongs.
  • the base station peer device is a relay device, and the related information of the selected communication path is provided to the base station peer device directly covered by the relay device, so that the base station peer device selects the communication path.
  • the present invention is a fast and efficient method for a base station peer device to select a suitable communication path with a base station.
  • the relay station or the mobile terminal can select an appropriate access path by using the present invention when accessing the network, and report to the base station.
  • the relay station can select a suitable alternate communication path for other base station peer devices under its jurisdiction according to the present invention and provide it to these other base station peer devices.
  • the base station peer device selects its communication path according to the communication quality information of all the candidate base stations and the complete communication path to the base station peer device, and can ensure that this is an optimal communication path for itself.
  • the mobile terminal can obtain each candidate path in different cells, so that it can be compared in the alternative path of different cells. Excellent choice.
  • the base station peer device does not have to report the measurement result to the base station, which saves communication resources and reduces the delay when the base station peer device enters or re-enters the network.
  • the present invention preferably The communication quality of each link is synthesized into the equivalent path quality, and the characterization, calculation and transmission overhead of the communication quality information of the communication path.
  • FIG. 1 is a schematic diagram showing the topology of a mobile terminal 1 accessing a wireless network according to an embodiment of the present invention
  • FIG. 2 is a flow chart showing a system method for selecting a preferred downlink communication path by the mobile terminal 1 with the assistance of the relay station 2a in the wireless relay network shown in FIG. 1 according to an embodiment of the present invention
  • FIG 3 is a block diagram showing the arrangement of the mobile terminal 1 of Figure 1 for selecting a preferred downstream communication path with the assistance of the relay station 2a, in accordance with yet another embodiment of the present invention.
  • the same or similar reference numerals denote the same or similar components.
  • FIG. 1 is a schematic diagram showing the topology of a mobile terminal 1 accessing a wireless relay network according to an embodiment of the present invention.
  • the wireless relay network is a WiMAX network
  • a relay station 2a belonging to the cell under the jurisdiction of base stations 3a, 3a of the base station downlink signal by the link L 3 may be sent to the relay station 2a, to be relayed by the relay station 2b by L -Ls the relay station 2a;
  • uplink signal relay station 2a may be by the link L 3, sent to the base station 3a, may be by the relay station 2b relay via ⁇ ⁇ '- ⁇ ⁇ , to the base station.
  • mobile terminal 1 is in both the relay station 2a and a base 2b within the coverage area, there is no access to the wireless network, the downlink relay communication links 2a may be established with the mobile terminal 1 to L 5, uplink communication is L 5,; the base station 2b can be built with the mobile terminal 1
  • the vertical downlink communication link is L 4 and the uplink communication link is L 4 .
  • FIG. 2 is a flow chart showing a system method for selecting a preferred downlink communication path by the mobile terminal 1 with the assistance of the relay station 2a in the wireless relay network shown in FIG. 1 according to an embodiment of the present invention.
  • FIG. 1 and FIG. 2 a method for selecting a downlink communication path between a base station and a mobile terminal as a mobile terminal of a base station peer device according to the present invention, and a base station for selecting a base station as a relay station serving as a base station peer device
  • the method of the downlink communication path with the mobile terminal will be described in detail.
  • step S10 the mobile terminal 1 acquires communication shield information of the available downlink communication path from the base station 3a to the mobile terminal.
  • the mobile terminal 1 acquires communication quality information of the downlink L 5 directly covering the relay station 2a to the mobile terminal 1 thereof.
  • the relay station 2a transmits a broadcast signal in its covered area, the broadcast signal including a preamble and the like.
  • the relay station 2a can obtain the communication quality information of L 2 based on the broadcast signal received from the relay station 2b.
  • the mobile information terminal according to the communication quality measurement preamble symbol; or according to the preamble sync symbols, is extracted from the broadcast signal, the pilot (Pilot) information, this can be calculated the road link L 5
  • the pilot (Pilot) information this can be calculated the road link L 5
  • a variety of information used to measure communication quality such as path loss, frequency efficiency, and signal-to-interference plus noise ratio (SINR).
  • the mobile terminal may also obtain the communication quality information of L 5 according to the downlink data signal (DL burst ) transmitted by the relay station 2a in the cell under its jurisdiction.
  • the communication quality of the downlink of the relay station 2a to the mobile terminal 1 may also be estimated by the relay station 2a according to the communication quality of the uplink of the mobile terminal 1 to the present relay station 2a, and provided to the Mobile terminal 1.
  • the mobile terminal can also use other methods to obtain the communication quality of the downlink to which the relay station is located. The specific acquisition method is not discussed in the present invention.
  • step S101 the mobile terminal 1 acquires communication quality information of one or more downlink communication paths of the base station 3a to the relay station 2a to which the relay station 2a belongs.
  • the mobile terminal 1 acquires communication quality information of one or more downlink communication paths with the assistance of the relay station 2a.
  • the relay station 2a acquires communication quality information of one or more downlink communication paths from the base station 3a to the present relay station 2a.
  • the relay station the relay station downlink acquisition 2a 2b 2a to the present relay station] ⁇ 2 of the communication quality information.
  • the relay station 2a can acquire the communication quality information of L 2 according to the broadcast signal of the relay station 2b.
  • the relay station 2a has been previously measured and stored communication information amount L 2 of the shield, the amount of information that the communication relay shield 2a may be obtained from the saved data.
  • the relay station 2a acquires the downlink communication link from the base station 3a to the relay station 2b to which the relay station 2b belongs! ⁇ Communication shield information.
  • the relay station 2b can acquire the communication quality information of the downlink from the base station 3a to the relay station 2b, and provides the information to the relay station 2a in a manner of, for example, broadcasting a message in its downlink subframe.
  • the relay station 2b can measure the communication quality information based on the downlink signals of the base station 3a to the present relay station 2b.
  • the relay station 2b obtains the communication quality information of the downlink of the previous hop relay station to the relay station 2b.
  • the downlink communication quality is obtained according to the downlink signal of the last hop relay station to the relay station 2b; the relay station 2b also obtains the communication quality of the downlink path of the base station 3a to the previous hop relay station to which the previous hop relay station belongs, preferably
  • the previous hop relay station may acquire the downlink communication quality information of the base station 3a to the previous hop relay station according to the downlink signal quality of the base station 3a to the previous hop relay station, and provide the information to the relay station 2b, for example, in a broadcast manner.
  • the relay station 2b to the base station 3a includes a plurality of relay stations, according to the above method, the relay station 2b can finally acquire the communication quality information of the communication path of the base station 3a to the present relay station 2b to which it belongs. .
  • the relay station 2a is based on ! ⁇ Communication quality information with L 2 acquires communication quality information of the downlink communication path L r L 2 of the base station 3a via the relay station 2b to the present relay station 2a.
  • the relay station 2a measures the virtual link P 12 by considering the L r L 2 path as a virtual link P 12 directly from the base station 3a to the present relay station 2a and using the equivalent path quality. Communication quality.
  • the communication quality of 1 ⁇ and 1 ⁇ is characterized by spectral efficiency and ⁇ (unit: bit / sec / Hz, bits / s / Hz), then the equivalent path quality can be the spectrum of the virtual link P 12 Efficiency; 7 12 , relay station 2a can calculate l2 using the following formula :
  • this formula is for example only and is not the only formula for calculating the equivalent spectral efficiency.
  • the communication quality with L 2 is characterized by its SINR, and the relay station 2a can obtain the corresponding channel capacity maximum value of the downlink by the Shannon formula according to the SINR, and then combine the modulation mode of the transmission signal on the downlink.
  • obtained data transfer rate (bit / sec) on the link, and then through 1 ⁇ L 2 of each of the data transmission rate can be obtained virtual link data transmission rate of P 12, then the data transmission rate as a virtual link
  • the equivalent path quality of P 12 .
  • the respective data transmission rates of 1 ⁇ and 1 ⁇ 2 are characterized by t x and t 2
  • the data transmission rate / 12 of the virtual link Pi2 can be:
  • the corresponding transmitter antenna gain and receiver antenna gain can also be considered simultaneously, thereby obtaining the communication quality of the communication path considering the signal quality. It will be understood by those skilled in the art that the several communication qualities mentioned in the specification are merely examples, and any other indicators for measuring the communication quality of the communication path should fall within the scope of the present invention and the scope of the claims.
  • the communication shield information that the relay station 2a acquires the downlink communication path of the base station 3a via the relay station 2b to the relay station 2a is not related, in step S203, 2 a relay station obtaining base station acquires the downlink relay station 3a according to the communication quality L 3 information.
  • the specific acquisition method is similar to the method in which the above relay station 2a acquires the relay station 2b to the relay station 2a.
  • the relay station 2a 3 may acquire the communication quality information L broadcast signal of the base station 3a.
  • the communication quality information of L 3 is characterized by spectral efficiency.
  • step S21 the relay station 2a only Gen according downlink communication path to the base station 3a to the present relay station 2a, L r L 2 and L communication quality information 3 from a> 12 Selection and L 3, the communication quality superior one Or two downlink communication paths are downlink communication paths of the base station 3a to the present relay station 2a.
  • the relay station 2a will select the relevant information of one or two downlink communication paths, such as the path topology, the communication quality information of the path, etc., for example, including the broadcast message in its downlink subframe.
  • the way is provided to the mobile terminal 1.
  • the relay station 2a needs to provide an alternative downlink communication path to the mobile terminal 1, and the relay station 2a provides relevant information of the preferred path to the mobile terminal 1; in another case, the relay station 2a needs to move to the mobile terminal. 1
  • a plurality of alternative downlink communication paths are provided, and the present relay station 2a can provide related information of both paths to the mobile terminal 1.
  • the relay station 2a need to provide an alternative downlink communication path to the mobile terminal 1, and the spectral efficiency 1 ⁇ 2 [eta] spectrum efficiency 12 to L 3 of ⁇ 3 is high, the relay station associated 2a will LL 2
  • the information is passed to the mobile terminal 1.
  • the communication quality in the related information of L r L 2 is represented by the equivalent path quality; in the other case, the relay station 2a supplies the communication quality of 1 ⁇ and L 2 to the mobile terminal 1, respectively.
  • step S101 the mobile terminal 1 receives the relevant information of the preferred downlink communication path L r L 2 from the base station 3a to the relay station 2a selected by the relay station 2a of the relay station 2a, for example, a broadcast message.
  • step S102 the mobile terminal 1 determines the base station 3a to the mobile according to the communication quality of the downlink communication path L r L 2 acquired in step S101 and the communication quality of the downlink L 5 acquired in step S100.
  • R & lt L L L 2 and the communication quality of the communication quality to 5 are spectral efficiency and 7712; 75 is characterized, according to the mobile terminal 1 may be similar to the formula (1)
  • the mode calculates the spectral efficiency of the downlink communication path LL 2 -L 5 .
  • the mobile terminal 1 acquires the available base station 3b to the mobile terminal 1 in step S11. Communication quality information of the downlink communication path.
  • the mobile terminal 1 determines the communication quality information of the downlink communication link L 4 of the base station 3b to the mobile terminal 1 based on the downlink signal from the base station 3b.
  • step S12 the mobile terminal 1 according to the communication quality of the downlink communication path LL 2 -L 5 of the base station 3a to the mobile terminal 1 acquired in step S10, and the base station 3b to the mobile terminal acquired in step S11 A communication quality of the downlink communication link L 4 of 1, and a downlink communication path of the access wireless communication network of the mobile terminal 1 that is superior in communication quality is selected.
  • the mobile terminal 1 reports the related information of the downlink communication path selected in step S12 to the base station corresponding to the selected downlink communication path, and requests the base station to allocate the downlink communication path to the mobile terminal. 1 use.
  • the mobile terminal 1 can acquire the situation of each of the alternative paths in different cells, so that a better choice can be made in the alternative paths of different cells. This is not solved in the prior art when it is selected by a base station that only knows the path condition in the own cell.
  • the present invention is not only applicable to a preferred communication path between a mobile terminal and a base station when accessing or re-accessing the wireless network; but also when the relay station accesses or re-accesses the wireless network. Choose a better communication path with the base station.
  • the present invention is also applicable to a process in which a base station peer device performs cross-cell or intra-cell handover. When the intra-cell or intra-cell handover is performed, in step S13, the base station peer device reports the selected preferred communication path to the base station to which the peer device of the base station belongs.
  • the mobile terminal 1 will also select a preferred upstream communication path to the base station.
  • the wireless communication network is similar to the communication quality of the uplink path acquired by the base station to the base station by the base station proposed by the applicant in the discussion of the IEEE 802.16m draft in March 2008 in the background art, so much
  • the base stations provide the uplink communication quality of the respective mobile terminal to the mobile station to the mobile terminal.
  • the mobile terminal receives the uplink communication shield of the corresponding uplink communication path provided by the plurality of base stations, and
  • the mobile terminal selects an appropriate access uplink communication path by itself.
  • each relay station acquires a preferred uplink path of the relay station to the owning base station, and the relay station obtains uplink communication quality of the base station peer device to the relay station by using uplink measurement, and the relay station selects one slave station.
  • the base station peer device provides a preferred path to the base station via the relay station, and provides the preferred path to the base station peer device for selection.
  • each relay station acquires a preferred uplink path of the relay station to the owning base station, and obtains uplink communication quality of the base station peer device to the relay station through uplink measurement, and then broadcasts the coverage to the coverage area.
  • the base station peer device, the base station peer device preferably selects a preferred path from the base station peer device to the base station.
  • the wireless communication network uses uplink and downlink channel symmetric communication methods such as TDD (Time Division Duplex) for uplink and downlink communication, and then the communication quality of the uplink communication path is substantially the same as the communication quality of the downlink communication path.
  • the mobile terminal 1 can obtain the communication quality information of the respective downlink communication paths from the base station 3a to the mobile terminal 1 using a similar method, thereby determining the mobile terminal. 1 The communication quality of the uplink communication path to the base station 3a; Similarly, in step Sir, the communication quality of the uplink communication path of the mobile terminal 1 to the base station 3b is determined.
  • step S12 the mobile terminal 1 selects a communication quality based on the communication quality of the respective uplink communication paths of the mobile terminal 1 to the base station 3a and the base station 3b.
  • the uplink communication path is an uplink communication path of the mobile terminal 1 to the base station.
  • step S13' the mobile terminal 1 reports the related information of the uplink communication path selected in step S12 to the base station corresponding to the selected uplink communication path, and requests the base station to allocate the uplink communication path to the base station.
  • the mobile terminal 1 is used.
  • the wireless communication network performs uplink and downlink communication using an uplink and downlink channel asymmetric communication method such as FDD (Frequency Division Duplex).
  • the mobile terminal 1 acquires the communication quality information of the uplink communication path by itself.
  • step S10 the mobile terminal 1 acquires communication amount information of the available uplink communication path of the mobile terminal to the base station 3a.
  • the mobile terminal 1 acquires communication quality information of its uplink L 5 to the relay station 2a directly covering it.
  • the relay station 2a measures the communication quality of L 5 according to an uplink signal such as a ranging request sent from the mobile terminal 1, and provides the communication quality to the mobile terminal 1.
  • the mobile terminal 1 may be determined according to the communication quality of the downlink L preamble symbols transmitted by the relay station 2b 5, the communication quality estimation and L 5 'in accordance with the communication quality L 5.
  • step S101' the mobile terminal 1 acquires communication quality information of the uplink communication path of the relay station 2a to the base station 3a.
  • the mobile terminal 1 acquires communication quality information of the uplink communication path of the relay station 2a to the base station 3a with the assistance of the relay station 2a.
  • step 20 the relay station 2a obtains the communication quality of the uplink communication path to the base station 3.
  • the relay station 2a present the acquired uplink relay station to the relay station 2a and 2b L 2, the amount of information communication shield.
  • the relay station 2b may acquire the communication quality information of L 2 according to the ranging request of the relay station 2a, and the quality information will be provided.
  • the relay station 2a may be determined according to the communication quality of the downlink L preamble symbols transmitted from the relay station 2b 2, L 2 and estimates, according to the communication quality of the communication quality L 2.
  • the relay station 2a acquires the relay station 2b to the relay station 2b.
  • Communication quality information of the uplink communication link of the base station 3a In a preferred embodiment, the relay station 2b can acquire the communication quality information of the uplink from the relay station 2b to the base station 3a, and provides the information to the relay station 2a, for example, in a broadcast manner.
  • the base station 3a can measure the communication quality information of I based on the uplink signal of the relay station 2b, and provide the information to the relay station 2b.
  • the relay station 2b Under other network topology, if there is another relay station between the relay station 2b and the base station 3a, the relay station 2b obtains the uplink communication quality information of the uplink hop relay station; the relay station 2b also acquires the previous hop relay station to The communication quality of the uplink path of the base station 3a.
  • the relay station 2b to the base station 3a includes a plurality of relay stations, according to the above method, the relay station 2b can finally acquire the communication quality information of the uplink communication path to the associated base station 3a.
  • step S202' the relay station 2a acquires the communication quality information of the uplink communication path L ⁇ -L ⁇ of the relay station 2a via the relay station 2b to the base station 3a based on the communication quality information of 1 ⁇ 2 and 1 ⁇ .
  • the relay station 2a considers the L 2 , -L path as a virtual link P 21 directly from the base station 3 to the present relay station 2a, and uses equivalent spectral efficiency or equivalent SINR.
  • the equivalent path quality is used to measure the communication quality of this virtual link P 21 .
  • the acquisition relay station 2a acquires communication quality information of its uplink communication path via the relay station 2b to the base station 3a, in step S203, the relay station 2a acquires the uplink L of the present relay station to the base station 3a. 3 , communication quality information.
  • the specific acquisition method is similar to the above method.
  • the base station 3a according to the ranging request to obtain the relay station 2a L 3, the communication quality information, and supplies it to the relay station 2a.
  • the relay station 2a may be obtained downlink communication quality of the downlink signal of a base station to the relay station 2a, 3a, and thus the estimated uplink corresponding L 3, communication quality.
  • the communication quality information of L 3 is characterized by spectral efficiency.
  • step S21 the relay station 2a performs the uplink communication path according to the present relay station 2a to the base station 3a.
  • the amount of information communication shield L, from Lz'-Li, and L 3 superior communication quality selected one or both of the uplink communication channel is an uplink communication path to the base station 3 according to the present relay station 2a.
  • step S22 the relay station 2a will select relevant information of one or two uplink communication paths, such as a path topology, communication quality information of the path, etc., to be provided to the mobile terminal 1 in a broadcast manner, for example.
  • information related to the superior uplink communication path L2'-L1' of the relay station 2a is supplied to the mobile terminal 1.
  • step S101 the mobile terminal 1 receives the information about the superior uplink communication path ⁇ - ⁇ from the relay station 2a to the base station 3a selected by the relay station 2a of the relay station 2a.
  • step S100' has no strict sequential relationship with step S101'. Then, in step S102 ', the mobile terminal 1 in step S101' obtains the uplink communication path acquired Lz'-Li, communication quality, and in step S100 the uplink L 5, communication shield amount determined The communication quality of the available uplink communication path I - L ⁇ -L of the mobile terminal 1 to the base station 3a.
  • the mobile terminal 1 acquires the communication quality information of the available uplink communication path of the mobile terminal 1 to the base station 3b.
  • the specific acquisition method is similar to the above method.
  • step S12 the mobile terminal 1 obtains the communication quality of the uplink communication path Ls'-I-I ⁇ of the mobile terminal 1 to the base station 3a acquired in step S10, and the information acquired in step Sir.
  • the communication quality of the uplink communication link L 4 of the base station 3b to the mobile terminal 1 selects an uplink communication path which is a communication quality of the mobile terminal 1 and which is the access wireless communication network of the mobile terminal 1.
  • the mobile terminal 1 reports the related information of the uplink communication path selected in step S12 to the base station corresponding to the selected uplink communication path, and requests the base station to allocate the uplink communication path to the base station.
  • the mobile terminal 1 is used.
  • Figure 3 illustrates the wireless relay shown in Figure 1 in accordance with yet another embodiment of the present invention.
  • a device for selecting a downlink communication path between a base station and a mobile terminal as a mobile terminal of a base station peer device according to the present invention, and a base station for selecting a base station by a relay station as a base station peer device The device for the downlink communication path with the mobile terminal will be described in detail.
  • the mobile terminal 1 includes means 10 for selecting a communication path between the base station and the mobile terminal 1, and includes a first obtaining means 100, a selecting means 101 and a reporting means 102.
  • the first obtaining device 100 includes a second obtaining device 1000 and a determining device 1001, and a seventh obtaining device 1002.
  • the second obtaining device 1000 includes a third obtaining device 10000 and a fourth obtaining device 10001.
  • the relay station 2a includes means 20 for selecting a communication path between the base station and the mobile terminal 1 for assisting the mobile terminal 1, wherein the first acquisition means 200, the selection means 201 and the providing means 202 are included; the first obtaining means 200 comprises a second The obtaining device 2000 and the determining device 2001, and the seventh obtaining device 2002; the second obtaining device 2000 includes a third obtaining device 20000 and a fourth obtaining device 20001.
  • the second obtaining means 1000 of the mobile terminal 1 acquires the communication quality information of the available downlink communication path from the base station 3a to the mobile terminal.
  • the third obtaining means 10000 acquires the communication amount information of the downlink L 5 directly covering the relay station 2a to the mobile terminal 1 of the mobile terminal 1.
  • the relay station 2a transmits a broadcast signal in its covered area, the broadcast signal including a preamble and the like.
  • the relay station 2a may be a broadcast signal from its home repeater station 2b is received, the communication quality obtained L 2 information.
  • the mobile information terminal according to the communication quality measurement preamble symbol; or according to the preamble sync symbols is extracted from the broadcast signal, the pilot (Pilot) information, to calculate the path loss L 5 link ( Path loss), frequency "frequency efficiency", signal to interference plus noise ratio (SINR), and the like for measuring communication quality.
  • Path loss path loss L 5 link
  • SINR signal to interference plus noise ratio
  • the mobile terminal can also be based on the relay station 2a
  • a downlink data signal (DL burst) transmitted in the managed cell obtains communication quality information of L 2.
  • the mobile terminal can also use other methods to obtain the communication quality of the downlink to the downlink station, specifically The acquisition method is not the invention What I want to discuss.
  • the upper-level network device of the relay station may estimate the communication quality of the downlink of the upper-level network device to the relay station according to the communication quality of the uplink of the relay station to the upper-level network device, and provide the same to the checkpoint.
  • the fourth obtaining means 10001 acquires communication quality information of one or more downlink communication paths of the base station 3a to the relay station 2a to which the relay station 2a belongs.
  • the mobile terminal 1 acquires the communication quality information of one or more downlink communication paths with the assistance of the relay station 2a, and the acquisition of the first acquisition device 200 of the relay station 2a to the base station 3a to the present relay station 2a is specific. Communication quality information of one or more downlink communication paths.
  • the third acquisition device 20000 of the second acquisition device 2000 of the first acquisition device 200 acquires the communication quality information of the downlink L 2 from the relay station 2b to the present relay station 2a.
  • the mobile terminal 1 with the above-described communication quality information acquisition process L 5 is similar to the relay station 2a 2 may acquire communication quality information L broadcast signal relay station 2b.
  • the relay station 2a has previously measured and saved the communication quality information of L 2 , and the relay station 2a can acquire the communication quality information of L! from the saved data.
  • the fourth obtaining means 20001 acquires the communication quality information of the downlink communication link 1 to the base station 3a to the relay station 2b to which the relay station 2b belongs.
  • the relay station 2b can acquire the communication quality information of the downlink from the base station 3a to the relay station 2b, and provides the information to the relay station 2a, for example, in a broadcast manner.
  • the relay station 2b can measure the communication quality information based on the downlink signals of the base station 3a to the relay station 2b. Under other network topology, if there is another relay station between the relay station 2b and the base station 3a, the relay station 2b acquires the communication shield information of the downlink of the previous hop relay station to the relay station 2b.
  • the above is also used.
  • the last hop relay station can acquire the downlink communication quality information of the base station 3a to the last hop relay station according to the downlink signal quality of the base station 3a to the previous hop relay station, and provide the information to the relay station 2b, for example, in a broadcast manner.
  • the relay station 2b to the base station 3a includes multiple relay stations, according to the above process, The relay station 2b is finally able to acquire the communication quality information of the communication path from the base station 3a to the present relay station 2b to which it belongs.
  • 2001 3a communication quality information apparatus and the communication quality information L 2 according to the base station acquires the downlink communication path L via the relay station 2b to the present R & lt relay station 2a, L 2 is determined.
  • the relay station 2a measures the virtual link P 12 by considering the L r L 2 path as a virtual link P 12 directly from the base station 3a to the present relay station 2a and using the equivalent path quality.
  • Communication quality for example, ! ⁇
  • the communication quality is characterized by frequency efficiency and ⁇ (unit: bit / sec / Hz, bits / s / Hz), then the equivalent path quality can be the spectral efficiency of the virtual link P 12 ⁇ , relay station 2a
  • this formula is for example only and is not the only formula for calculating the equivalent spectral efficiency. For example, you can also exercise power in the formula.
  • ! ⁇ The communication quality with L 2 is characterized by its SINR, and the relay station 2a can obtain the corresponding channel capacity maximum value of the downlink according to the SINR through the Shannon formula, and then obtain the modulation method of the transmission signal on the downlink.
  • the data transmission rate (bits/second:) on the link, and then the data transmission rate of the virtual link P 12 can be obtained by the respective data transmission rate with L 2 , and the data transmission rate can be used as a virtual link.
  • the seventh acquisition means 2002 acquires the downlink of the acquisition base station 3a to the present relay station, and the second acquisition means 2000 determines that the relay station 2a does not correlate the communication quality information of the downlink communication path of the base station 3a via the relay station 2b to the relay station 2a, and the seventh acquisition means 2002 acquires the downlink of the acquisition base station 3a to the present relay station.
  • L 3 of the communication quality information The specific acquisition process is similar to the process in which the above relay station 2a acquires the relay station 2b to the relay station 2a.
  • the seventh obtaining means 2002 can acquire the communication quality information of L 3 according to the broadcast signal of the base station 3a.
  • the communication quality information of L 3 is characterized by spectral efficiency.
  • the selection means 201 selects the communication quality information of the downlink communication paths L r L 2 and L 3 of the base station 3a to the present relay station 2a, and selects a better communication quality from P 12 and L 3 Or two downlink communication paths are downlink communication paths of the base station 3a to the present relay station 2a.
  • the providing device 202 will select relevant information of one or two downlink communication paths, such as a path topology, communication quality information of the path, etc., to the mobile terminal 1 in a manner such as a broadcast message.
  • the relay station 2a needs to provide an alternative downlink communication path to the mobile terminal 1, and the relay station 2a transmits the relevant information of the preferred path to the mobile terminal 1; in another case, the relay station 2a needs to move to the mobile terminal. 1
  • a plurality of alternative downlink communication paths are provided, and the relay station 2a can provide related information of the two paths to the mobile terminal 1.
  • the relay station 2a needs to provide an alternative downlink communication path to the mobile terminal 1, and the frequency efficiency of L r L 2 is higher than the spectral efficiency ⁇ 3 of L 3 , and the relay station 2a will L r
  • the related information of L 2 is passed to the mobile terminal 1.
  • the communication quality in the related information of L r L 2 is represented by the equivalent path quality; in the other case, the relay station 2a supplies the communication quality with L 2 to the mobile terminal 1, respectively.
  • the fourth acquisition means 10001 receives information on the preferred downlink communication path LL 2 from the base station 3a selected by the relay station 2a of the relay station 2a to the relay station 2a.
  • the determining device 1001 determines the base station 3a to the mobile terminal according to the communication quality of the downlink communication path L r L 2 acquired at the fourth acquiring device 10001 and the communication quality of the downlink L 5 acquired by the third acquiring device 10000.
  • the communication quality of L r L 2 and the communication quality of L 5 are respectively characterized by spectral efficiency; 7 12 and 5
  • the mobile terminal 1 can calculate the downlink communication path according to a method similar to formula ( 1 ).
  • the spectral efficiency of L r L 2 -L 5 E.g:
  • the seventh capturing device 1002 acquires the communication quality information of the available downlink communication path of the base station 3b to the mobile terminal 1.
  • the mobile terminal 1 determines the communication of the downlink communication link L 4 of the base station 3b to the mobile terminal 1 according to the downlink signal from the base station 3b. Letter quality information.
  • the seventh obtaining device 1002 has no strict sequential relationship with the second obtaining device 1000 and the determining device 1001.
  • the selection device 101 is based on the communication shield amount of the downlink communication path LL 2 -L 5 of the base station 3a determined by the second acquisition device 1000 and the determination device 1001 to the mobile terminal 1, and the base station 3b acquired by the seventh acquisition device 1002.
  • the communication shield of the downlink communication link L 4 of the mobile terminal 1 selects a downlink communication path of the access wireless communication network of the mobile terminal 1 which is superior in communication quality.
  • the reporting device 102 reports the relevant information of the downlink communication path selected by the selection device 101 to the base station corresponding to the selected downlink communication path, and requests the base station to allocate the downlink communication path to the mobile terminal 1 for use.
  • the mobile terminal 1 can acquire the situation of each of the alternative paths in different cells, so that a better choice can be made in the alternative paths of different cells. This is not solved in the prior art when it is selected by a base station that only knows the path condition in the own cell.
  • the present invention is not only applicable to a mobile terminal selecting a preferred communication path with a base station when accessing or re-accessing a wireless network or switching between cells or cells; it is also applicable to a relay station accessing or When re-accessing the wireless network or switching between cells or between cells, a preferred communication path with the base station is selected.
  • the mobile terminal 1 will also select a preferred upstream communication path to the base station.
  • the wireless communication network is similar to the applicant in the background art.
  • the communication quality of the uplink path obtained by the base station to the base station is obtained by the base station in the discussion of the IEEE 802.16m draft in March 2008, and then the plurality of base stations provide the uplink communication quality of the mobile terminal to the base station to the mobile.
  • the first obtaining means 100 of the device 10 for selecting the communication path between the base station and the mobile terminal 1 of the mobile terminal receives the uplink communication quality of the corresponding uplink communication path provided by the plurality of base stations, and then selects The device 101 selects a suitable access uplink communication path for the mobile terminal.
  • the wireless communication network uses uplink and downlink channel symmetric communication methods such as TDD (Time Division Duplex) for uplink and downlink communication, and then the communication quality of the uplink communication path is substantially the same as the communication quality of the downlink communication path.
  • the second obtaining apparatus 1000 may obtain the communication quality information of the respective downlink communication paths of the base station 3a to the mobile terminal 1 by using a similar method, and the seventh obtaining apparatus 1002 acquires the mobile terminal 1
  • the determining device 1001 determines the communication quality of the uplink communication path of the mobile terminal 1 to the base stations 3a and 3b to the communication quality of the uplink communication path to the base station 3b.
  • the selection device 101 selects an uplink communication path with a better communication quality from the mobile terminal 1 to the communication quality of the respective uplink communication paths of the base station 3a and the base station 3b, and the uplink communication path of the mobile terminal 1 to the base station. .
  • the reporting device 102 reports the related information of the uplink communication path selected by the selection device 101 to the base station corresponding to the selected uplink communication path, and requests the base station to allocate the uplink communication path to the mobile terminal 1 for use.
  • Those skilled in the art can understand that in the uplink and downlink channel asymmetric system, if the downlink communication quality can be estimated in a certain manner through the downlink communication shield, the above situation can also be applied.
  • the wireless communication network performs uplink and downlink communication using an uplink and downlink channel asymmetric communication method such as FDD (Frequency Division Duplex).
  • the mobile terminal 1 acquires the communication quality information of the uplink communication path by itself.
  • the mobile terminal 1 includes means 10 for selecting a communication path between the base station and the mobile terminal 1, and includes a first obtaining means 100, a selecting means 10 and a reporting means 102.
  • the first obtaining device 100 includes a second obtaining device 1000, a determining device 100A, and a seventh obtaining device 1002.
  • the second obtaining device 1000 includes a fifth obtaining device 10000 and a sixth obtaining device 10001.
  • the relay station 2a includes means 20 for selecting the communication path between the base station and the mobile terminal 1 for assisting the mobile terminal 1, wherein the first acquisition means 200, the selection means 201, the providing means 202, and the first obtaining means 200 are included.
  • the second acquiring apparatus 1000 of the mobile terminal 1 acquires the mobile terminal to the base station Communication quality information of the available upstream communication path of 3a.
  • the fifth obtaining means 10000 acquires the communication quality information of the uplink L 5 to the relay station 2a directly covering it.
  • the relay station 2a measures the communication shield amount of L 5 according to an uplink signal such as a ranging request sent from the mobile terminal 1, and provides the quality to the mobile terminal 1 by, for example, broadcasting.
  • the mobile terminal 1 may be determined according to the communication quality of the downlink L preamble symbols transmitted by the relay station 2b 5, the communication quality estimation and L 5 'in accordance with the communication quality L 5.
  • the sixth obtaining means 10001 acquires communication quality information of the uplink communication path of the relay station 2a to the base station 3a.
  • the mobile terminal 1 acquires communication quality information of the uplink communication path of the relay station 2a to the base station 3a with the assistance of the relay station 2a.
  • the first obtaining means 200 of the relay station 2a acquires the communication quality of the uplink communication path to the base station 3.
  • the fifth acquisition device 20000 of the second acquisition device 2000 acquires the communication quality information of the uplink L 2 of the relay station 2a to the relay station 2b.
  • the relay station 2b may acquire the communication quality information of L 2 according to the ranging request of the relay station 2a, and will broadcast the quality to, for example, broadcast.
  • the way is provided to the relay station 2a.
  • the relay station 2a may be determined according to the communication quality of the downlink L preamble symbols transmitted from the relay station 2b 2, and the communication quality estimation L 2 'of communication quality according to L 2.
  • the sixth obtaining means 20001 acquires communication quality information of the uplink communication link Li of the base station 3a to which the relay station 2b belongs to the relay station 2b.
  • the relay station 2b can acquire the communication quality information of the uplink 1 to the base station 3b, and provide the information to the relay station 2a, for example, in a broadcast manner.
  • the base station 3a can measure the communication quality information according to the uplink signal of the relay station 2b, and provide the information to the relay station 2b.
  • the relay station 2b Under other network topology, if there is another relay station between the relay station 2b and the base station 3a, the relay station 2b obtains the uplink communication quality information of the uplink hop relay station; the relay station 2b also acquires the previous hop relay station to The communication quality of the uplink path of the base station 3a.
  • the relay station 2b to the base station 3a includes a plurality of relay stations, according to the above method, the relay station 2b eventually The communication quality information of the uplink communication path to the associated base station 3a can be acquired.
  • the determination means 2001 according to L 2, with the communication quality information acquired via this relay station uplink communication path 2a 2b relay station to the base station 3a of L 2, -L communication quality information.
  • the relay station 2a regards the path as a virtual link P 21 directly from the base station 3 to the present relay station 2a by using I ⁇ -, and uses equivalent spectral efficiency or equivalent SINR, etc.
  • the quality of the path is used to measure the communication quality of this virtual link P 21 .
  • the nitrate relaying station 2a acquires the communication quality information of the uplink communication path via the relay station 2b to the base station 3a
  • the seventh acquisition means 2002 acquires the acquisition of the present relay station to the base station 3a.
  • Communication quality information of uplink L 3 ' The specific acquisition method is similar to the above method.
  • the base station 3a according to the ranging request to obtain the relay station 2a L 3, the communication quality information, and supplies it to the relay station 2a.
  • the seventh obtaining means 2002 can be obtained downlink communication quality of the downlink signal of a base station to the relay station 2a, 3a, and thus the estimated uplink corresponding L 3, communication quality.
  • the communication quality information of L 3 is characterized by spectral efficiency.
  • the selecting means 201 selects a better communication quality from I - I ⁇ and L 3 according to the communication quality information of the uplink communication paths L 2 , -L and L 3 of the relay station 2a to the base station 3a.
  • two uplink communication paths are uplink communication paths of the base station 3 to the present relay station 2a.
  • the providing device 202 is configured to provide relevant information of one or two uplink communication paths, such as a path topology structure, a communication shield information of the path, and the like, to the mobile terminal 1 in a broadcast manner, for example.
  • relevant information of the superior uplink communication path L -] ⁇ of the relay station 2a is supplied to the mobile terminal 1.
  • the fourth obtaining means 10001 receives the information on the superior uplink communication path I ⁇ -L! from the relay station 2a to the base station 3a selected by the relay station 2a of the relay station 2a.
  • the third obtaining device 10000 and the fourth acquiring device 10001 have no strict sequential relationship.
  • the determining device 1001 determines the communication quality of the uplink communication path acquired by the fourth obtaining device 10001, the communication shield amount of the uplink communication path L 2 , - , and the third acquiring device 10000, and obtains the uplink L 5 . Available uplink communication path from mobile terminal 1 to base station 3a I -I - , the quality of communication.
  • a seventh acquiring means 1002 acquires the base station that the mobile terminal 1 to the available uplink communication path 3b L 4, the communication quality information.
  • the specific acquisition method is similar to the above method.
  • the selection device 101 determines the communication quality of the uplink communication path Ls'-I ⁇ '-I ⁇ of the mobile terminal 1 to the base station 3a, and the seventh obtaining device 1002, the acquired base station 3b to L 4, the communication quality of the uplink communication of the mobile terminal 1, choose a superior communication quality of the present mobile terminal access uplink communication path is a wireless communication network.
  • the reporting device 102 reports related information of the selected uplink communication path in the selection device 101 to the base station corresponding to the selected uplink communication path, and requests the base station to allocate the uplink communication path to the mobile terminal 1 for use.
  • the present invention has been described with respect to the specific embodiments thereof, and it is understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications and changes within the scope of the appended claims.

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Description

无线网络中基站对端设备
选择通信路径的方法和装置 技术领域
本发明涉及基于无线通信网络, 尤其涉及无线通信网络中的基站 对端设备选择通信路径的方法与装置。 背景技术
当今的无线网络对系统容量的要求越来越高, 如何在颁定的频带不 断提高通信性能是本领域中的一个重要问题。 由于中继和多跳中继对增 加系统吞吐量有着显著的作用, 因此得到了越来越广泛的关注。 由于中 继站点的引入, 可供网络中的基站对端设备, 例如中继站或移动终端, 可选择的通信路径的增多了, 因此基站对端设备如何选择合适的通信路 径, 成为当前本领域所关注的一个技术问题。
在当前的中继 /多跳中继网络中, 基站对端设备, 例如中继站或移动 终端, 可能处于由多个中继站和 /或基站同时覆盖的区域中。 同时, 这多 个备选的接入站点,即多个中继站和 /或基站,可能分别属于不同的小区。 因此, 基站对端设备在接入或重新接入无线网络时, 应能够从这些备选 的接入站点中较优的一个进行接入, 并通过一条较优的通信路径与对应 小区的基站相连。 如何快速而有效地选定基站至基站对端设备的通信质 量较优的通信路径, 是无线多跳网络中必须解决的关键问题。 其中, 通 信路径包括基站至该基站对端设备的下行通信路径, 与该基站对端设备 至该基站的上行通信路径。
对于 WiMAX无线通信网络, 本申请人在 2008 年 3 月的 IEEE 802.16m草案讨论中, 提出了如下的通信路径选择方案: 移动终端获 取上一跳中继站至本移动终端的下行链路的通信质量信息, 并将该信 息反馈回基站; 该上一跳中继站同样获取其上级网络设备至本中继站 的下行链路的通信质量信息, 也将该信息反馈回基站; 以此类推, 最 终基站将获得本基站至该移动终端的下行通信路径中所有链路的通 信质量信息, 并根据这些信息为该移动终端确定优选的本基站至该移 动终端的下行通信路径。 同理, 移动终端的上一跳中继站获取该移动 终端至本基站的上行通信链路的通信质量信息, 并将该信息反馈给基 站; 该上一跳网络设备的上级设备也将该上一跳网络设备至本设备的 上行通信链路的通信质量信息汇报给基站; 以此矣推, 最终基站将获 得本该移动终端至本基站的上行通信路径中所有链路的通信质量信 息, 并根据这些信息为该移动终端确定优选的本基站至该移动终端的 上行通信路径。 这一技术方案有如下缺点:
1.移动终端及各个中继站点向基站汇报各条链路的通信质量信息 需要消耗一定资源, 并导致额外的延迟;
2.在移动终端处于小区边缘, 由多个属于不同小区的接入站点覆 盖时, 不同小区的基站仅能获知该移动终端在本基站所辖小区内的较 优路径, 而无法得知其他小区的备选路径的情况, 从而无法为该移动 终端确定较好的接入站点。 发明内容
为解决现有技术的上述缺点,本发明提出了在无线通信网络中, 用 于为基站对端设备选择本基站对端设备与基站之间的通信路径的方 法。基站对端设备自身获取本基站对端设备与备选基站之间的一条或 多跳可用的通信路径的通信质量信息, 而后从该一条或多条可用的通 信路径中选择通信质量较优的为选定的本网絡设备与基站之间的通 信路径。
根据本发明的第一方面, 提供了一种在无线通信网络的基站对端设 备中用于选择基站与本基站对端设备之间的通信路径的选择的方法, 其中, 包括以下步驟: L获取一个或多个基站与所述本基站对端设 备之间的相应的一条或多条可用的通信路径的通信质量信息; ii.才艮 据所述一个或多个基站与所述本基站对端设备之间的相应的一条或 多条可用的通信路径的通信质量信息,从中选择通信质量较优的一条 或多条可用的通信路径为基站与所述本基站对端设备之间的选定通 信路径。
根据本发明的第二方面, 提供了一种在无线通信网络的基站对端 设备中用于选择基站与本基站对端设备之间的通信路径的装置, 其 中, 包括: 第一获取装置, 用于获取一个或多个基站与所述本基站对 端设备之间的相应的一条或多条可用的通信路径的通信质量信息; 选 择装置, 用于才艮据所述一个或多个基站与所述本基站对端设备之间 的相应的一条或多条可用的通信路径的通信质量信息, 从中选择通信 质量较优的一条或多条可用的通信路径为基站与所述本基站对端设 备之间的选定通信路径。
优选地, 该基站对端设备是中继设备或移动终端, 当其进入或重 新进入无线通信网络时, 其将选定通信路径的相关信息汇报给所述选 定通信路径对应的基站或, 以便基站将对应的通信路径分配给该基站 对端设备; 当其进行小区切换时, 其将选定通信路径的相关信息汇报 给本基站对端设备目前所属的基站。
优选地, 该基站对端设备是中继设备, 其将选定通信路径的相关 信息提供给本中继设备直接覆盖的基站对端设备, 以供这些基站对端 设备选择通信路径时使用。
本发明是一种快速而高效的基站对端设备选择合适的与基站之 间的通信路径的方法。 优选的, 中继站或移动终端可以在接入网络时 采用本发明选取合适的接入路径, 并向基站汇报。 优选的, 中继站可 以根据本发明为其所辖的其他基站对端设备选择合适的备选通信路 径, 并提供给这些其他基站对端设备。 根据本发明, 基站对端设备根 据所有备选基站与至本基站对端设备之间完整的通信路径的通信质 量信息来选定其通信路径, 能够保证这是一条对于自己最优的通信路 径。 尤其在移动终端处于小区边缘, 由多个属于不同小区的站点覆盖 时, 该移动终端能够得到在不同小区中的各条备选路径的情况, 从而 能够在不同小区的备选路径中做出较优的选择。 不仅如此, 在本发明 中, 基站对端设备不必将测量结果汇报给基站, 节约了通信资源, 降 低了基站对端设备进入或重新进入网络时的延迟。 此外, 本发明优选 的将各段链路的通信质量合成为等效路径质量, 筒化通信路径的通信 质量信息的表征、 计算和传输开销。 附图说明
通过阅读参照以下附图所作的对非限制性实施例所作的详细描 述, 本发明的其它特征、 目的和优点将会变得更加明显:
图 1示出了根据本发明的一个具体实施例,移动终端 1接入无线网 絡的拓朴结构示意图;
图 2示出了根据本发明的一个具体实施例, 图 1所示的无线中继网 络中, 移动终端 1在中继站 2a的辅助下选择较优的下行通信路径的系 统方法流程图;
图 3示出了根据本发明的又一个具体实施例, 图 1所示的无线中继 网络中移动终端 1在中继站 2a的辅助下选择较优的下行通信路径的装 置的框图。 附图中, 相同或者相似的附图标识代表相同或者相似的部件。 具体实施方式
以下参照附图 1至图 2, 从系统方法的角度对本发明的具体实施 方式进行详细描述:
第一实施例
图 1示出了 >据本发明的一个具体实施例,移动终端 1接入无线中 继网络的拓朴结构示意图。其中,该无线中继网络是一个 WiMAX网络; 中继站 2a属于基站 3a管辖的小区 A, 基站 3a的下行信号可以由链路 L3发至中继站 2a, 也可以由中继站 2b中继经 L -Ls至中继站 2a; 中继 站 2a的上行信号可以由链路 L3,发至基站 3a, 也可以由中继站 2b中继 经 Ι^'-Ι^,至基站 3a;移动终端 1处于中继站 2a和基站 2b两者的覆盖范 围内,还没有接入到该无线网络中, 中继站 2a可以与移动终端 1建立的 下行通信链路为 L5, 上行通信链路为 L5,; 基站 2b可以与移动终端 1建 立的下行通信链路为 L4, 上行通信链路为 L4,。 本领域技术人员应能理 解, 本发明并不限于图 1所示的 WiMAX无线中继网络及该拓朴结构, 在其他类型的无线网络及拓朴结构中本发明同样适用。
图 2示出了根据本发明的一个具体实施例, 图 1所示的无线中继网 络中, 移动终端 1在中继站 2a的辅助下, 选择较优的下行通信路径的 系统方法流程图。
下面将参照图 1和图 2, 对根据本发明, 作为基站对端设备的移动 终端选择基站与本移动终端之间的下行通信路径的方法, 与作为基站 对端设备的中继站辅助移动终端选择基站与该移动终端之间的下行 通信路径的方法进行详述。
首先, 在步骤 S10中, 移动终端 1获取基站 3a至本移动终端的可 用的下行通信路径的通信盾量信息。
具体的, 在步骤 S100中, 移动终端 1获取直接覆盖其的中继站 2a 至本移动终端 1 的下行链路 L5的通信质量信息。 在一个优选的实施例 中, 中继站 2a在其覆盖的区域中发送广播信号,该广播信号包括前导符 号 (preamble )等等。 中继站 2a可以才 据其接收到的来自中继站 2b的 广播信号, 得到 L2的通信质量信息。 举例来说, 优选的, 移动终端根据 前导符号测量通信质量信息; 或者根据前导符号进行同步后, 从该广播 信号中提取出导频(pilot )信息, 以此可以计算出 L5链路的路损 ( Path loss ), 频谱效率( frequency efficiency ), 信号与干扰加噪声比 (SINR ) 等多种用于衡量通信质量的信息。 在另一实施例中, 移动终端也可以根 据中继站 2a在其所辖小区中发送的下行数据信号(DL burst ), 获得 L5 的通信质量信息。 在其他实施例中, 也可以由中继站 2a根据移动终端 1 至本中继站 2a的上行链路的通信质量, 估计出中继站 2a至该移动终端 1 的下行链路的通信质量, 并将其提供给该移动终端 1。 本领域技术人 员可以理解, 移动终端还可以使用其他方法, 获取中继站至其的下行链 路的通信质量, 具体的获取方法并不是本发明所要讨论的。
而在步骤 S101中,移动终端 1获取中继站 2a所属的基站 3a至中继 站 2a的一条或多条下行通信路径的通信质量信息。在一个优选的实施例 中,移动终端 1在中继站 2a的辅助下获取一条或多条下行通信路径的通 信质量信息。
具体的, 在步骤 S20中, 中继站 2a获取基站 3a至本中继站 2a的一 条或多条下行通信路径的通信质量信息。
其中, 在步骤 S200中, 中继站 2a获取中继站 2b至本中继站 2a的 下行链路]^2的通信质量信息。 优选的, 与上述的移动终端 1获取 1^的 通信质量信息的方法类似的, 中继站 2a可以根据中继站 2b的广播信号 获取 L2的通信质量信息。 在另一个例子中, 中继站 2a先前已经测量并 保存了 L2的通信盾量信息, 那么中继站 2a可以从保存的数据中获取 的通信盾量信息。
而后, 在步骤 S201中, 中继站 2a获取中继站 2b所属的基站 3a至 中继站 2b的下行通信链路!^的通信盾量信息。在一个优选的实施例中, 中继站 2b可以获取到基站 3a至中继站 2b的下行链路 的通信质量信 息, 并将该信息以例如包含在其下行子帧中广播消息的方式提供给中继 站 2a。 其中, 在本实施例中, 中继站 2b可以根据基站 3a至本中继站 2b 的下行信号测量出 的通信质量信息。在其他的网络拓朴结构下, 若中 继站 2b至基站 3a之间还有一个中继站,那么中继站 2b获取其上一跳中 继站至中继站 2b 的下行链路的通信质量信息, 优选的, 也使用上述的 方法, 根据上一跳中继站至中继站 2b 的下行信号测量得到该下行链路 的通信质量; 中继站 2b也获取其上一跳中继站所属的基站 3a至其上一 跳中继站的下行路径的通信质量, 优选的, 上一跳中继站可以根据基站 3a至上一跳中继站的下行信号质量获取到基站 3a至上一跳中继站的下 行链路的通信质量信息, 并将该信息以例如广播的方式提供给中继站 2b。 以此类推, 在其他网絡拓朴结构下, 若中继站 2b至基站 3a包含多 个中继站, 根据上述的方法, 中继站 2b 最终能够获取到其所属的基站 3a至本中继站 2b的通信路径的通信质量信息。
接着, 在步骤 S202中, 中继站 2a根据!^与 L2的通信质量信息, 获取基站 3a经过中继站 2b至本中继站 2a的下行通信路径 LrL2的通 信质量信息。 在一个优选的实施例中, 中继站 2a通过将 LrL2路径看作一条由 基站 3a直接至本中继站 2a的虚拟链路 P12, 并使用等效路径质量来 衡量这条虛拟链路 P12的通信质量。 举例来说, 1^与 1^的通信质量分 别以频谱效率 与^ (单位: 比特 /秒 /赫兹, bits/s/Hz ) 来表征, 那么 等效路径质量可以为虚拟链路 P12的频谱效率; 712 , 中继站 2a可以使用 以下公式计算出 l2 :
Figure imgf000009_0001
值得注意的是, 该公式仅仅是为了示例, 并不是计算等效频谱效率 的唯一的公式。 例如, 还可以对该公式中 或^进行加权。 例如,
Figure imgf000009_0002
其中, 《为加权系数。
在另一个例子中, !^与 L2的通信质量以其 SINR表征, 则中继站 2a可以根据 SINR, 通过香农公式, 得到其对应的下行链路的信道容 量最大值, 继而再结合该下行链路上的传输信号的调制方式得到该链 路上的数据传输速率 (比特 /秒), 再通过 1^与 L2的各自的数据传输 速率可以获得虚拟链路 P12的数据传输速率, 继而将该数据传输速率 作为虚拟链路 P12的等效路径质量。 具体的, 1^与 1^2的各自的数据传 输速率以 tx和 t2表征, 那么虛拟链路 Pi2的数据传输速率 /12可以为:
Figure imgf000009_0003
不仅如此, 通信路径的通信质量中, 还可以同时考虑相应的发射机 天线增益与接收机天线增益 , 以此得到考虑了信号质量的通信路径的通 信质量。 本领域技术人员可以理解, 本说明书所举的几种通信质量仅仅 为了示例, 其他任何衡量通信路径的通信质量的指标都应落入本发明及 权利要求书的保护范围。
与步驟 S200至 S202获取中继站 2a获取基站 3a经由中继站 2b至 中继站 2a的下行通信路径的通信盾量信息不相关的, 在步骤 S203中, 中继站 2a获取获取基站 3a至本中继站的下行链路 L3的通信质量信息。 具体的获取方法与以上中继站 2a获取中继站 2b至中继站 2a的方法类 似。 优选的, 中继站 2a可以根据基站 3a的广播信号获取 L3的通信质量 信息。 优选的, L3的通信质量信息由频谱效率 来表征。
而后, 在步骤 S21中, 中继站 2a才艮据基站 3a至本中继站 2a的下 行通信路径 LrL2与 L3的通信质量信息, 从 1>12与 L3中选定通信质量 较优的一条或两条下行通信路径为基站 3a至本中继站 2a的下行通信 路径。
然后, 在步骤 S22中, 中继站 2a将选择较优的一条或两条下行 通信路径的相关信息, 例如路径拓朴结构, 路径的通信质量信息等, 以 例如包含其下行子帧中的广播消息中的方式提供给移动终端 1。 一种情 况下, 中继站 2a需要向移动终端 1提供一条备选的下行通信路径, 那中继站 2a则将较优路径的相关信息提供给移动终端 1 ;另一种情况 下, 中继站 2a需要向移动终端 1提供多条备选的下行通信路径, 那 么本中继站 2a可以将两条路径的相关信息都提供给移动终端 1。在本 实施例中, 中继站 2a需要向移动终端 1提供一条备选的下行通信路 径, 且 1^ 2的频谱效率 η12比 L3的频谱效率 η3高, 则中继站 2a则将 L L2的相关信息通给移动终端 1。 在一种情况下, LrL2的相关信息 中的通信质量以等效路径质量来表示; 在另一种情况下, 中继站 2a 分别将 1^与 L2的通信质量提供给移动终端 1。
则在步骤 S101中, 移动终端 1接收来自中继站 2a的以例如广播消 息发送的中继站 2a选择的基站 3a至中继站 2a的较优的下行通信路径 LrL2的相关信息。
值得注意的是, 以上步驟 S100与步骤 S101没有严格的顺序关系。 而后, 在步骤 S102中, 移动终端 1根据在步骤 S101中获取的下行 通信路径 LrL2的通信质量, 与步骤 S100中获取到的下行链路 L5的通 信质量, 确定基站 3a至本移动终端 1 的可用的下行通信路径 L L2-L5 的通信质量。 在一个实施例中, LrL2的通信质量与 L5的通信质量分别 以频谱效率 7712和;75来表征, 则移动终端 1可以根据类似于公式( 1 )的 方式计算出下行通信路径 L L2-L5的频谱效率。 例如:
7/125 二 /ηη + η5 ( 4 ) 进一步的, 由于移动终端 1还处于小区 Β的基站 3b的覆盖范围内, 在步骤 S11 中, 移动终端 1获取基站 3b至本移动终端 1的可用下行通 信路径的通信质量信息。 优选的, 与前述的方式类似, 移动终端 1根 据来自基站 3b的下行信号, 确定基站 3b至移动终端 1的下行通信链 路 L4的通信质量信息。
值得注意的是, 以上步骤 S11与步骤 S10没有严格的顺序关系。 而后, 在步骤 S12中, 移动终端 1根据在步骤 S10中获取到的基 站 3a至本移动终端 1的下行通信路径 L L2-L5的通信质量,与步骤 S11 中获取到的基站 3b至移动终端 1的下行通信链路 L4的通信质量,从中 选择一条通信质量较优的作为本移动终端 1的接入无线通信网络的下 行通信路径。
优选的, 在步骤 S13中, 移动终端 1将步骤 S12中选定的下行通 信路径的相关信息汇报给该选定的下行通信路径对应的基站, 并请求 该基站该下行通信路径分配给本移动终端 1使用。
这样而来, 移动终端 1可以获取到不同小区中的各条备选路径的 情况, 从而能够在不同小区的备选路径中做出较优的选择。 这是现有 技术中, 由仅知道本小区内的路径情况的基站进行选择时所不能解决 的。
本领域技术人员明白, 本发明不仅适用于移动终端在接入或重新 接入无线网络时, 选择与基站之间较优的通信路径; 也适用于中继站 在接入或重新接入无线网络时, 选择与基站之间较优的通信路径。 本 发明同样适用于基站对端设备进行跨小区或者小区内切换等过程。 其 中, 在进行跨小区或者小区内切换时, 在步骤 S13中, 基站对端设备 将选定的较优的通信路径汇报给本基站对端设备目前所属的基站。 第二实施例
在一个进一步的实施例中, 移动终端 1还将选择至基站的较优的 上行通信路径。
在一种情况下, 该无线通信网络类似于背景技术中本申请人在 2008年 3月的 IEEE 802.16m草案讨论中提出的由基站获取到移动终 端至本基站的上行路径的通信质量, 那么多个基站将各自的该移动终 端至本基站的上行通信质量提供给该移动终端,在类似的步骤 S10及 S11 中, 移动终端接收到多个基站提供的对应上行通信路径的上行通 信盾量, 而在步骤 S12中, 该移动终端自行选择合适的接入上行通信 路径。
不仅可以由基站向移动终端提供优选的路径质量信息, 也可以由 中继站向移动终端提供优选的路径质量信息。具体的,在一种情况下, 每个中继站获取本中继站到所属基站的优选上行路径, 同时本中继站 通过上行链路测量获得该基站对端设备到本中继站的上行通信质量, 本中继站选择一条从该基站对端设备经由本中继站到该基站的优选 路径, 并将该优选路径提供给该基站对端设备供其选择。 在又一种情 况下, 每个中继站获取本中继站到所属基站的优选上行路径, 并通过 上行链路测量获得该基站对端设备到本中继站的上行通信质量, 而后 通过广播给覆盖范围内的该基站对端设备, 该基站对端设备优选出从 本基站对端设备到本基站的优选路径。
在另一种情况下, 该无线通信网络使用诸如 TDD (时分双工)的 上下行信道对称的通信方式进行上下行通信, 那么上行通信路径的通 信质量与下行通信路径的通信质量是基本相同的。 则类似于第一实施 例, 在步骤 S10,中, 移动终端 1可以使用类似的方法, 获取到基站 3a 至本移动终端 1 的各自的下行通信路径的通信质量信息后, 由此确定 本移动终端 1 至基站 3a的上行通信路径的通信质量; 同理, 在步骤 Sir中, 确定本移动终端 1 至基站 3b的上行通信路径的通信质量。 而后, 在步骤 S12,中移动终端 1 据本移动终端 1至基站 3a与基站 3b的各自的上行通信路径的通信质量,从中选定通信质量较^ ^的一条 上行通信路径为移动终端 1至基站的上亍通信路径。 优选的, 在步驟 S13'中,移动终端 1将步骤 S12,中选定的上行通信路径的相关信息汇 报给该选定的上行通信路径对应的基站, 并请求该基站该上行通信路 径分配给本移动终端 1使用。 本领域技术人员可以明白, 在上下行信 道非对称系统中, 若通过下行通信质量, 可以以一定方式估计出较准 确的上行通信质量, 那么以上情况也可以适用。
在又一种情况下, 该无线通信网络使用诸如 FDD (频分双工)的 上下行信道非对称的通信方式进行上下行通信。移动终端 1 自己获取 上行通信路径的通信质量信息。
在这种情况下, 具体的, 在步驟 S10,中, 移动终端 1获取本移动终 端至基站 3a的可用的上行通信路径的通信廣量信息。
具体的, 在步骤 S100,中, 移动终端 1获取其至直接覆盖其的中继 站 2a的上行链路 L5,的通信质量信息。 优选的, 中继站 2a根据移动终 端 1发来的例如测距请求等上行信号, 测得 L5,的通信质量, 并将该 通信质量提供给移动终端 1。 在另一个例子中, 移动终端 1也可以根 据中继站 2b发送的前导符号的确定下行链路 L5的通信质量, 并根据 L5的通信质量推测 L5 '的通信质量。
步骤 S101 '中,移动终端 1获取中继站 2a至基站 3a的上行通信路 径的通信质量信息。 在一个优选的实施例中, 移动终端 1在中继站 2a 的辅助下获取中继站 2a至基站 3a的上行通信路径的通信质量信息。
具体的, 在步骤 20,中, 中继站 2a获取其至基站 3的上行通信路 径的通信质量。
其中, 在步骤 S200'中, 中继站 2a获取到本中继站 2a至中继站 2b 的上行链路 L2,的通信盾量信息。 优选的, 与上述的移动终端 1获取 L5, 的通信盾量信息的方法类似的, 中继站 2b可以才 据中继站 2a的测距请 求获取 L2,的通信质量信息, 并将并将该质量提供给中继站 2a。 在另一 个例子中, 中继站 2a也可以根据中继站 2b发送的前导符号的确定下 行链路 L2的通信质量, 并根据 L2的通信质量估计出 L2,的通信质量。
而后, 在步骤 S201,中, 中继站 2a获取中继站 2b至中继站 2b所属 的基站 3a的上行通信链路 ,的通信质量信息。在一个优选的实施例中, 中继站 2b可以获取到中继站 2b至基站 3a的上行链路 ,的通信质量信 息, 并将该信息以例如广播的方式提供给中继站 2a。 其中, 在本实施例 中, 以与前述的方法,基站 3a可以根据中继站 2b的上行信号测量出 I 的通信质量信息, 并将该信息提供给中继站 2b。 在其他的网络拓朴结构 下,若中继站 2b至基站 3a之间还有一个中继站,那么中继站 2b获取其 至上一跳中继站的上行链路的通信质量信息; 中继站 2b也获取其上一 跳中继站至基站 3a的上行路径的通信质量。 以此类推,在其他网络拓朴 结构下, 若中继站 2b至基站 3a包含多个中继站, 根据上述的方法, 中 继站 2b最终能够获取其至所属的基站 3a的上行通信路径的通信质量信 息。
接着, 在步骤 S202'中, 中继站 2a根据 1^2,与 1^,的通信质量信息, 获取本中继站 2a经过中继站 2b至基站 3a的上行通信路径 L^-L^,的 通信质量信息。
在一个优选的实施例中, 中继站 2a通过将 L2,-L 路径看作一条 由基站 3直接至本中继站 2a的虚拟链路 P21,,并使用等效频谱效率或 等效 SINR之类的等效路径质量来衡量这条虚拟链路 P21,的通信质量。
与步骤 S200,至 S202'获取中继站 2a获取其经由中继站 2b至基站 3a 的上行通信路径的通信质量信息不相关的, 在步骤 S203,中, 中继站 2a 获取获取本中继站至基站 3a的上行链路 L3,的通信质量信息。 具体的获 取方法与以上的方法类似。 优选的, 基站 3a根据中继站 2a的测距请求 获取 L3,的通信质量信息, 并将其提供给中继站 2a。 在另一种情况下, 中继站 2a也可以根据基站 3a至中继站 2a的下行信号得到该下行链路的 通信质量, 并以此估计得到相应上行链路 L3,的通信质量。 优选的, L3, 的通信质量信息由频谱效率来表征。
而后,在步骤 S21,中, 中继站 2a才艮据本中继站 2a至基站 3a的上 行通信路径
Figure imgf000014_0001
,与 L3,的通信盾量信息,从 Lz'-Li,与 L3,中选定通信 质量较优的一条或两条上行通信路径为基站 3至本中继站 2a的上行 通信路径。 然后, 在步骤 S22,中, 中继站 2a将选择较优的一条或两条上行 通信路径的相关信息, 例如路径拓朴结构, 路径的通信质量信息等, 以例如广播的方式提供给移动终端 1。 例如, 中继站 2a较优的上行通 信路径 L2'-L1'的相关信息提供给移动终端 1。
则在步骤 S101,中, 移动终端 1接收来自中继站 2a的中继站 2a选 择的中继站 2a至基站 3a的较优的上行通信路径 Ι^-Ι^,的相关信息。
值得注意的是, 以上步骤 S100'与步骤 S101'没有严格的顺序关系。 而后, 在步骤 S102'中, 移动终端 1根据在步骤 S101'中获取的上行 通信路径 Lz'-Li,的通信质量,与步驟 S100中获取到的上行链路 L5,的通 信盾量,确定本移动终端 1至基站 3a的可用的上行通信路径 I -L^-L 的通信质量。
进一步的, 由于移动终端 1还处于小区 B的基站 3b的覆盖范围内, 在步骤 Sir中, 移动终端 1获取本移动终端 1至基站 3b的可用上行通 信路径 的通信质量信息。 具体的获取方式与上述方法类似。
值得注意的是, 以上步骤 sir与步驟 S10,没有严格的顺序关系。 而后, 在步骤 S12,中, 移动终端 1根据在步骤 S10,中获取到的本 移动终端 1 至基站 3a的上行通信路径 Ls'-l -I^,的通信质量, 与步骤 Sir中获取到的基站 3b至移动终端 1的上行通信链路 L4,的通信质量, 从中选择一条通信质量较优的作为本移动终端 1的接入无线通信网络 的上行通信路径。
优选的, 在步骤 S13,中, 移动终端 1将步骤 S12,中选定的上行通 信路径的相关信息汇报给该选定的上行通信路径对应的基站, 并请求 该基站该上行通信路径分配给本移动终端 1使用。 以上对根据本发明的系统方法的具体实施例进行了详述。 以下将 从系统装置的角度对本发明的具体实施方式进行详细描述。 第三实施例
图 3示出了根据本发明的又一个具体实施例, 图 1所示的无线中继 网络中移动终端 1在中继站 2a的辅助下选择较优的下行通信路径的装 置的框图。
下面将参照图 2和图 3 , 对根据本发明, 作为基站对端设备的移动 终端选择基站与本移动终端之间的下行通信路径的装置, 与作为基站 对端设备的中继站辅助移动终端选择基站与该移动终端之间的下行 通信路径的装置进行详述。
在本实施例中, 移动终端 1包括用于选择基站与本移动终端 1之间 的通信路径的装置 10, 其中, 包括第一获取装置 100, 选择装置 101与 汇报装置 102。 第一获取装置 100包括第二获取装置 1000与确定装置 1001 , 及第七获取装置 1002; 第二获取装置 1000 包括第三获取装置 10000与第四获取装置 10001。 中继站 2a包括用于选择辅助移动终端 1 选择基站与移动终端 1之间的通信路径的装置 20, 其中, 包括第一获取 装置 200, 选择装置 201与提供装置 202; 第一获取装置 200包括第二 获取装置 2000与确定装置 2001 , 及第七获取装置 2002; 第二获取装置 2000包括第三获取装置 20000与第四获取装置 20001。
首先, 移动终端 1的第二获取装置 1000获取基站 3a至本移动终端 的可用的下行通信路径的通信质量信息。
具体的, 第三获取装置 10000获取直接覆盖其的中继站 2a至本移 动终端 1 的下行链路 L5的通信廣量信息。 在一个优选的实施例中, 中 继站 2a在其覆盖的区域中发送广播信号, 该广播信号包括前导符号 ( preamble )等等。 中继站 2a可以 居其接收到的来自中继站 2b的广 播信号, 得到 L2的通信质量信息。 举例来说, 优选的, 移动终端根据前 导符号测量通信质量信息; 或者根据前导符号进行同步后, 从该广播信 号中提取出导频(pilot )信息, 从而计算出 L5链路的路损 ( Path loss ), 频 "i瞽效率 (frequency efficiency ), 信号与干扰加噪声比 (SINR )等多种 用于衡量通信质量的信息。 在另一实施例中, 移动终端也可以根据中继 站 2a在其所辖小区中发送的下行数据信号 ( DL burst ) , 获得 L2的通信 质量信息。 本领域技术人员可以理解, 移动终端还可以使用其他方法, 获取中继站至其的下行链路的通信质量, 具体的获取方法并不是本发明 所要讨论的。 例如, 在对称信道中, 中继站的上级网络设备可以根据中 继站至本上级网络设备的上行链路的通信质量, 估计本上级网络设备至 该中继站的下行链路的通信质量, 并将其提供给该中继站。
第四获取装置 10001获取中继站 2a所属的基站 3a至中继站 2a的一 条或多条下行通信路径的通信质量信息。 在一个优选的实施例中, 移动 终端 1在中继站 2a的辅助下获取一条或多条下行通信路径的通信质量信 具体的, 中继站 2a的第一获取装置 200的获取到基站 3a至本中继 站 2a的一条或多条下行通信路径的通信质量信息。
其中, 第一获取装置 200 的第二获取装置 2000 的第三获取装置 20000获取到中继站 2b至本中继站 2a的下行链路 L2的通信质量信息。 优选的, 与上述的移动终端 1获取 L5的通信质量信息的过程类似的, 中 继站 2a可以根据中继站 2b的广播信号获取 L2的通信质量信息。在另一 个例子中, 中继站 2a先前已经测量并保存了 L2的通信质量信息, 那么 中继站 2a可以从保存的数据中获取 L!的通信质量信息。
而后, 第四获取装置 20001获取中继站 2b所属的基站 3a至中继站 2b的下行通信链路 1^的通信质量信息。 在一个优选的实施例中, 中继 站 2b可以获取到基站 3a至中继站 2b的下行链路 的通信质量信息, 并将该信息以例如广播的方式提供给中继站 2a。 其中, 在本实施例中, 中继站 2b可以根据基站 3a至本中继站 2b的下行信号测量出 的通信 质量信息。 在其他的网络拓朴结构下, 若中继站 2b至基站 3a之间还有 一个中继站, 那么中继站 2b获取其上一跳中继站至中继站 2b的下行链 路的通信盾量信息, 优选的, 也使用上述的过程, 根据上一跳中继站至 中继站 2b的下行信号测量得到该下行链路的通信质量; 中继站 2b也获 取其上一跳中继站所属的基站 3a至其上一跳中继站的下行路径的通信 质量,优选的,上一跳中继站可以根据基站 3a至上一跳中继站的下行信 号质量获取到基站 3a至上一跳中继站的下行链路的通信质量信息,并将 该信息以例如广播的方式提供给中继站 2b。 以此类推, 在其他网络拓朴 结构下, 若中继站 2b至基站 3a包含多个中继站, 才艮据上述的过程, 中 继站 2b最终能够获取到其所属的基站 3a至本中继站 2b的通信路径的通 信质量信息。
接着, 确定装置 2001根据 与 L2的通信质量信息, 获取基站 3a 经过中继站 2b至本中继站 2a的下行通信路径 LrL2的通信质量信息。
在一个优选的实施例中, 中继站 2a通过将 LrL2路径看作一条由 基站 3a直接至本中继站 2a的虚拟链路 P12, 并使用等效路径质量来 衡量这条虚拟链路 P12的通信质量。 举例来说, !^与 的通信质量分 别以频 i普效率 与^ (单位: 比特 /秒 /赫兹, bits/s/Hz ) 来表征, 那么 等效路径质量可以为虚拟链路 P12的频谱效率^ , 中继站 2a可以使用 以下公式计算出 712
Figure imgf000018_0001
值得注意的是, 该公式仅仅是为了示例, 并不是计算等效频谱效率 的唯一的公式。 例如, 还可以对该公式中 或^进行力口权。 在另一个例 子中, !^与 L2的通信质量以其 SINR表征, 则中继站 2a通过香农公 式可以根据 SINR得到其对应的下行链路的信道容量最大值, 继而再 结合该下行链路上的传输信号的调制方式得到该链路上的数据传输 速率 (比特 /秒:), 再通过 与 L2的各自的数据传输速率可以获得虚 拟链路 P12的数据传输速率, 将该数据传输速率就可以作为虚拟链路
P12的等效路径质量。
与第二获取装置 2000与确定装置 2001确定中继站 2a获取基站 3a 经由中继站 2b至中继站 2a的下行通信路径的通信质量信息不相关的, 第七获取装置 2002获取获取基站 3a至本中继站的下行链路 L3的通信质 量信息。 具体的获取过程与以上中继站 2a获取中继站 2b至中继站 2a 的过程类似。 优选的, 第七获取装置 2002可以根据基站 3a的广播信号 获取 L3的通信质量信息。 优选的, L3的通信质量信息由频谱效率 来 表征。
而后, 选择装置 201 居基站 3a至本中继站 2a的下行通信路径 LrL2与 L3的通信质量信息, 从 P12与 L3中选定通信质量较优的一条 或两条下行通信路径为基站 3a至本中继站 2a的下行通信路径。
然后,提供装置 202将选择较优的一条或两条下行通信路径的相 关信息, 例如路径拓朴结构, 路径的通信质量信息等, 以例如广播 消息的方式提供给移动终端 1。 一种情况下, 中继站 2a需要向移动终 端 1提供一条备选的下行通信路径, 那中继站 2a则将较优路径的相 关信息通给移动终端 1 ; 另一种情况下, 中继站 2a需要向移动终端 1 提供多条备选的下行通信路径, 那么本中继站 2a可以将两条路径的 相关信息都提供给移动终端 1。在本实施例中, 中继站 2a需要向移动 终端 1提供一条备选的下行通信路径, 且 LrL2的频语效率 /^比 L3 的频谱效率 η3高,则中继站 2a则将 LrL2的相关信息通给移动终端 1。 在一种情况下, LrL2的相关信息中的通信质量以等效路径质量来表 示; 在另一种情况下, 中继站 2a分别将 与 L2的通信质量提供给移 动终端 1。
则在第四获取装置 10001接收来自中继站 2a的中继站 2a选择的基 站 3a至中继站 2a的较优的下行通信路径 L L2的相关信息。
值得注意的是, 以上第三获取装置 10000与第四获取装置 10001的 运行没有严格的顺序关系。 ,
而后, 确定装置 1001根据在第四获取装置 10001获取的下行通信 路径 LrL2的通信质量, 与第三获取装置 10000获取到的下行链路 L5的 通信质量,确定基站 3a至本移动终端 1的可用的下行通信路径 LrL2-L5 的通信质量。 在一个实施例中, LrL2的通信质量与 L5的通信质量分别 以频谱效率;7125来表征, 则移动终端 1可以根据类似于公式( 1 )的 方式计算出下行通信路径 LrL2-L5的频谱效率。 例如:
Figure imgf000019_0001
进一步的, 由于移动终端 1还处于小区 B的基站 3b的覆盖范围内, 第七荻取装置 1002获取基站 3b至本移动终端 1的可用下行通信路径的 通信质量信息。 优选的, 与前述的方式类似, 移动终端 1根据来自基 站 3b的下行信号, 确定基站 3b至移动终端 1的下行通信链路 L4的通 信质量信息。
值得注意的是, 以上第七获取装置 1002, 与第二获取装置 1000与 确定装置 1001没有严格的顺序关系。
而后,选择装置 101根据第二获取装置 1000与确定装置 1001确定 的基站 3a至本移动终端 1的下行通信路径 L L2-L5的通信盾量, 与第 七获取装置 1002获取到的基站 3b至移动终端 1的下行通信链路 L4的 通信盾量, 从中选择一条通信质量较优的作为本移动终端 1的接入无 线通信网络的下行通信路径。
优选的, 汇报装置 102将选择装置 101选定的下行通信路径的相 关信息汇报给该选定的下行通信路径对应的基站, 并请求该基站该下 行通信路径分配给本移动终端 1使用。
这样而来, 移动终端 1可以获取到不同小区中的各条备选路径的 情况, 从而能够在不同小区的备选路径中做出较优的选择。 这是现有 技术中, 由仅知道本小区内的路径情况的基站进行选择时所不能解决 的。
本领域技术人员明白, 本发明不仅适用于移动终端在接入或重新 接入无线网络或者跨小区或小区间切换时, 选择与基站之间较优的通 信路径; 也适用于中继站在接入或重新接入无线网络或者跨小区或小 区间切换时, 选择与基站之间较优的通信路径。 第四实施例
在一个进一步的实施例中, 移动终端 1还将选择至基站的较优的 上行通信路径。
在一种情况下, 该无线通信网络类似于背景技术中本申请人在
2008年 3月的 IEEE 802.16m草案讨论中提出的由基站获取到移动终 端至本基站的上行路径的通信质量, 那么多个基站将各自的该移动终 端至本基站的上行通信质量提供给该移动终端, 移动终端含有的用于 选择基站与本移动终端 1之间的通信路径的装置 10的第一获取装置 100 接收到多个基站提供的对应上行通信路径的上行通信质量,接着其选 择装置 101为该移动终端自行选择合适的接入上行通信路径。
在另一种情况下, 该无线通信网络使用诸如 TDD (时分双工)的 上下行信道对称的通信方式进行上下行通信, 那么上行通信路径的通 信质量与下行通信路径的通信质量是基本相同的。 则类似于第三实施 例, 第二获取装置 1000可以使用类似的方法,获取到基站 3a至本移动 终端 1 的各自的下行通信路径的通信质量信息后, 第七获取装置 1002 获取本移动终端 1至基站 3b的上行通信路径的通信质量, 确定装置 1001则确定本移动终端 1至基站 3a及 3b的上行通信路径的通信质量。 而后, 选择装置 101才艮据本移动终端 1至基站 3a与基站 3b的各自的 上行通信路径的通信质量,从中选定通信质量较优的一条上行通信路 径为移动终端 1至基站的上行通信路径。汇报装置 102将选择装置 101 选定的上行通信路径的相关信息汇报给该选定的上行通信路径对应 的基站, 并请求该基站该上行通信路径分配给本移动终端 1使用。 本 领域技术人员可以明白, 在上下行信道非对称系统中, 若通过下行通 信盾量, 可以以一定方式估计出较准确的上行通信质量, 那么以上情 况也可以适用。
在又一种情况下, 该无线通信网络使用诸如 FDD (频分双工)的 上下行信道非对称的通信方式进行上下行通信。移动终端 1 自己获取 上行通信路径的通信质量信息。
在这种情况下, 移动终端 1包括用于选择基站与本移动终端 1之间 的通信路径的装置 10, 其中, 包括第一获取装置 100,, 选择装置 10Γ 与汇报装置 102,。 第一获取装置 100,包括第二获取装置 1000,与确定装 置 100Γ , 及第七获取装置 1002,。 第二获取装置 1000,包括第五获取装 置 10000,与第六获取装置 10001,。 中继站 2a包括用于选择辅助移动 终端 1选择基站与移动终端 1之间的通信路径的装置 20, 其中, 包括第 一获取装置 200,, 选择装置 201,与提供装置 202,; 第一获取装置 200, 包括第二获取装置 2000,与确定装置 2001,, 及第七获取装置 2002,; 第 二获取装置 2000,包括第五获取装置 20000,与第六获取装置 20001,。
具体的, 移动终端 1 的第二获取装置 1000,获取本移动终端至基站 3a的可用的上行通信路径的通信质量信息。
具体的, 第五获取装置 10000,获取其至直接覆盖其的中继站 2a的 上行链路 L5,的通信质量信息。 优选的, 中继站 2a根据移动终端 1发 来的例如测距请求等上行信号, 测得 L5,的通信盾量, 并将该质量以 例如广播的方式提供给移动终端 1。 在另一个例子中, 移动终端 1也 可以根据中继站 2b发送的前导符号的确定下行链路 L5的通信质量, 并根据 L5的通信质量推测 L5'的通信质量。
而第六获取装置 10001,获取中继站 2a至基站 3a的上行通信路径 的通信质量信息。 在一个优选的实施例中, 移动终端 1在中继站 2a的 辅助下获取中继站 2a至基站 3a的上行通信路径的通信质量信息。
具体的, 中继站 2a的第一获取装置 200,获取其至基站 3的上行通 信路径的通信质量。
其中, 第二获取装置 2000,的第五获取装置 20000,获取到本中继站 2a至中继站 2b的上行链路 L2,的通信质量信息。 优选的, 与上述的移动 终端 1获取 L5,的通信质量信息的方法类似的, 中继站 2b可以根据中继 站 2a的测距请求获取 L2,的通信质量信息,并将并将该质量以例如广播 的方式提供给中继站 2a。在另一个例子中, 中继站 2a也可以根据中继 站 2b发送的前导符号的确定下行链路 L2的通信质量,并根据 L2的通 信质量推测 L2'的通信质量。
第六获取装置 20001,获取中继站 2b至中继站 2b所属的基站 3a的 上行通信链路 Li,的通信质量信息。 在一个优选的实施例中, 中继站 2b 可以获取到中继站 2b至基站 3a的上行链路 1^,的通信质量信息,并将该 信息以例如广播的方式提供给中继站 2a。 其中, 在本实施例中, 以与前 述的方法,基站 3a可以根据中继站 2b的上行信号测量出 1^,的通信质量 信息, 并将该信息提供给中继站 2b。 在其他的网络拓朴结构下, 若中继 站 2b至基站 3a之间还有一个中继站,那么中继站 2b获取其至上一跳中 继站的上行链路的通信质量信息; 中继站 2b也获取其上一跳中继站至 基站 3a的上行路径的通信质量。 以此类推, 在其他网络拓朴结构下, 若 中继站 2b至基站 3a包含多个中继站,根据上述的方法, 中继站 2b最终 能够获取其至所属的基站 3a的上行通信路径的通信质量信息。 接着, 确定装置 2001,根据 L2,与 ,的通信质量信息, 获取本中继 站 2a经过中继站 2b至基站 3a的上行通信路径 L2,-L 的通信质量信 息。
在一个优选的实施例中, 中继站 2a通过将 I^- ,路径看作一条 由基站 3直接至本中继站 2a的虚拟链路 P21,,并使用等效频谱效率或 等效 SINR之类的等效路径质量来衡量这条虚拟链路 P21,的通信质量。
与第二获取装置 2000'与确定装置 2001,硝定中继站 2a获取其经由 中继站 2b至基站 3a的上行通信路径的通信质量信息不相关的, 第七获 取装置 2002,获取获取本中继站至基站 3a的上行链路 L3'的通信质量信 息。 具体的获取方法与以上的方法类似。 优选的, 基站 3a根据中继站 2a的测距请求获取 L3,的通信质量信息, 并将其提供给中继站 2a。 在另 一种情况下,第七获取装置 2002,也可以根据基站 3a至中继站 2a的下行 信号得到该下行链路的通信质量, 并以此估计得到相应上行链路 L3,的 通信质量。 优选的, L3,的通信质量信息由频谱效率来表征。
而后, 选择装置 201,根据本中继站 2a至基站 3a的上行通信路径 L2,-L 与 L3,的通信质量信息,从 I -I^,与 L3,中选定通信质量较优的 一条或两条上行通信路径为基站 3至本中继站 2a的上行通信路径。
然后,提供装置 202,将选择较优的一条或两条上行通信路径的相 关信息, 例如路径拓朴结构, 路径的通信盾量信息等, 以例如广播 的方式提供给移动终端 1。 例如, 中继站 2a较优的上行通信路径 L -]^,的相关信息提供给移动终端 1。
则第四获取装置 10001,接收来自中继站 2a的中继站 2a选择的中继 站 2a至基站 3a的较优的上行通信路径 I^-L!,的相关信息。
值得注意的是, 以上第三获取装置 10000,与第四获取装置 10001, 没有严格的顺序关系。
而后, 确定装置 1001,根据第四获取装置 10001,获取的上行通信路 径 L2,- ,的通信盾量, 与第三获取装置 10000,获取到的上行链路 L5,的 通信质量, 确定本移动终端 1 至基站 3a 的可用的上行通.信路径 I -I - ,的通信质量。
进一步的, 由于移动终端 1还处于小区 B的基站 3b的覆盖范围内, 第七获取装置 1002,获取本移动终端 1至基站 3b的可用上行通信路径 L4, 的通信质量信息。 具体的获取方式与上述方法类似。
值得注意的是, 以上第七获取装置 1002,, 与第二获取装置 1000, 与确定装置 1001,没有严格的顺序关系。
而后, 选择装置 101,根据第二获取装置 1000,与确定装置 1001,确 定的本移动终端 1至基站 3a的上行通信路径 Ls'-I^'-I^,的通信质量,与 第七获取装置 1002,中获取到的基站 3b至移动终端 1 的上行通信链路 L4,的通信质量,从中选择一条通信质量较优的作为本移动终端 1的接 入无线通信网络的上行通信路径。
优选的, 汇报装置 102,将选择装置 101,中选定的上行通信路径的 相关信息汇报给该选定的上行通信路径对应的基站 , 并请求该基站该 上行通信路径分配给本移动终端 1使用。 以上对本发明的具体实施例进行了描述, 需要理解的是, 本发明 并不局限于上述特定的实施方式, 本领域技术人员可以在所附权利要 求的范围内做出各种定型和修改。

Claims

权 利 要 求 书
1. 一种在无线通信网络的基站对端设备中用于选择基站与本基站 对端设备之间的通信路径的方法, 其中, 包括以下步骤:
1. 获取一个或多个基站与所述本基站对端设备之间的相应的一 条或多条可用的通信路径的通信质量信息;
ii. 才艮据所述一个或多个基站与所述本基站对端设备之间的相应 的一条或多条可用的通信路径的通信质量信息,从中选择通信质量较 优的一条或多条可用的通信路径为基站与所述本基站对端设备之间 的选定通信路径。
2. 根据权利要求 1所述的方法, 其特征在于, 所述无线通信网络 包括无线中继网络, 所述步骤 i进一步包括:
11.当所述本基站对端设备被一个或多个相关中继设备所直接覆盖 时, 获取所述一个或多个相关中继设备与所述本基站对端设备之间的 一条或多条相应的通信链路的通信质量信息, 并获取所述一个或多个 相关中继设备各自所属的相关基站与所述一个或多个相关中继设备 之间的相应的一条或多条通信路径的通信质量信息;
12.根据所述一个或多个相关中继设备与所述本基站对端设备之间 的一条或多条相应的通信链路的通信质量信息, 与所述一个或多个相 关中继设备各自所属的相关基站与所述一个或多个相关中继设备之 间的相应的一条或多条通信路径的通信质量信息, 确定所述相关基站 与所述本基站对端设备之间的相应的一条或多条可用的通信路径的 通信质量信息。
3. 根据权利要求 2所述的方法, 其特征在于, 所述步骤 il进一步 包括:
a. 获取所述一个或多个相关中继设备至所述本基站对端设备的一 条或多条相应的下行通信链路的通信质量信息;
还包括:
b. 获取所述一个或多个相关中继设备各自所属的相关基站至所述 一个或多个相关中继设备之间的相应的一条或多条下行通信路径的 通信质量信息;
所述步骤 i2进一步包括:
- 根据所述一个或多个相关中继设备至所述本基站对端设备的一 条或多条相应的下行通信链路的通信质量信息, 与所述一个或多个相 关中继设备各自所属的相关基站至所述一个或多个相关中继设备之 间的相应的一条或多条下行通信路径的通信质量信息, 确定所述相关 基站与所述本基站对端设备之间的相应的一条或多条可用的下行和 / 或上行通信路径的通信质量信息。
4. 根据权利要求 3所述的方法, 其特征在于, 所述步骤 a包括:
- 根据来自所述一个或多个相关中继设备的下行信号, 确定所述 一个或多个相关中继设备至所述本基站对端设备的相应的下行通信 链路的通信质量信息。
5. 根据权利要求 3或 4所述的方法, 其特征在于, 所述步骤 b包 括:
- 接收来自所述一个或多个相关中继设备的, 相应的中继设备所 属的相关基站至相应的相关中继设备的一条或多条相应的下行通信 路径的下行通信质量信息。
6. 根据权利要求 2所述的方法, 其特征在于, 所述步骤 il进一步 包括:
a'.获取所述本基站对端设备至所述一个或多个相关中继设备的一 条或多条相应的上行通信链路的通信质量信息;
还包括:
b,.获取所述一个或多个相关中继设备至所述一个或多个相关中继 设备各自所属的相关基站至的相应的一条或多条上行通信路径的通 信质量信息;
所述步骤 i2进一步包括:
- 根据所述本基站对端设备至所述一个或多个相关中继设备的一 条或多条相应的上行通信链路的通信质量信息, 与所述一个或多个相 关中继设备至所述一个或多个相关中继设备各自所属的相关基站至 的相应的一条或多条上行通信路径的通信质量信息, 确定所述相关基 站与所述本基站对端设备之间的相应的一条或多条可用的上行和 /或 下行通信路径的通信盾量信息;
7. 根据权利要求 6所述的方法, 其特征在于, 所述步骤 a,包括:
- 根据来自所述一个或多个相关中继设备的下行信号, 确定所述 一个或多个相关中继设备至所述本基站对端设备的相应的上行通信 链路的通信质量信息。
8. 根据权利要求 6或 7所述的方法, 其特征在于, 所述步骤 b,包 括:
- 接收来自所述一个或多个相关中继设备的, 相应的相关中继设 备至所述一个或多个相关中继设备各自所属的相关基站至的相应的 一条或多条上行通信路径的通信质量信息。
9. 根据权利要求 1至 8中任一项所述的方法, 其特征在于, 所述 步骤 i进一步包括:
il,.当一个或多个相关基站直接覆盖所述本基站对端设备时, 获取 所述一个或多个相关基站与所述本基站对端设备之间的相应的一条 或多条通信链路的通信质量信息。
10.根据权利要求 9所述的方法, 其特征在于, 所述步骤 il,中, 进 一步包括:
- 根据来自所述直接覆盖所述本基站对端设备的一个或多个相关 基站的各自的下行信号, 确定所述一个或多个相关基站至所述本基站 对端设备的相应的一条或多条可用的下行通信链路的通信质量信息。
11.根据权利要求 9所述的方法, 其特征在于, 所述步骤 il,中, 进 一步包括:
- 接收来自所述直接覆盖所述本基站对端设备的一个或多个相关 基站的,相应的相关基站至所述本基站对端设备的相应的一条或多条 上行通信链路的通信质量信息。。
12.根据权利要求 1至 11中任一项所述的方法, 其特征在于, 所述 基站对端设备包括中继设备或移动终端。
13.根据权利要求 12所述的方法, 其特征在于, 该方法还包括以下 步骤:
iii.将所述选定通信路径的相关信息汇报给所述选定下行通信路径 对应的基站, 或者本基站对端设备目前所属的基站。
14.根据权利要求 1至 11中任一项所述的方法, 其特征在于, 所述 基站对端设备包括中继设备, 所述步骤 i还包括:
- 获取本中继设备所属的基站与所述本中继设备之间的相应的 一条或多条可用的通信路径的通信质量信息;
所述步骤 ii还包括:
- 根据所述本中继设备所属的基站与所述本中继设备之间的相 应的一条或多条可用的通信路径的通信质量信息, 从中选择通信质量 较优的一条或多条可用的通信路径为所述本中继设备所属的基站与 所述本中继设备之间的选定通信路径;
该方法还包括以下步骤:
iii,.将所述选定通信路径的相关信息提供给本中继设备直接覆盖 的基站对端设备。
15.根据权利要求 1至 14中任一项所述的方法, 其特征在于, 所述 通信质量信息包括其对应的通信路径的等效路径质量信息。
16.根据权利要求 15所述的方法, 其特征在于, 所述等效路径质量 信息包括等效频谱效率, 和 /或等效信号与噪声加干扰比。
17.根据权利要求 1至 16中任一项所述的方法, 其特征在于, 所述 无线通信网络包括 WiMAX网络。
18. —种在无线通信网络的基站对端设备中用于选择基站与本基 站对端设备之间的通信路径的装置, 其中, 包括:
- 第一获取装置, 用于获取一个或多个基站与所述本基站对端设 备之间的相应的一条或多条可用的通信路径的通信质量信息;
- 选择装置,用于根据所述一个或多个基站与所述本基站对端设 备之间的相应的一条或多条可用的通信路径的通信质量信息, 从中选 择通信质量较优的一条或多条可用的通信路径为基站与所述本基站 对端设备之间的选定通信路径。
19.根据权利要求 18所述的装置, 其特征在于, 所述无线通信网络 包括无线中继网络, 所述第一获取装置进一步包括:
- 第二获取装置, 用于当所述本基站对端设备被一个或多个相关 中继设备所直接覆盖时, 获取所述一个或多个相关中继设备与所述本 基站对端设备之间的一条或多条相应的通信链路的通信质量信息, 并 获取所述一个或多个相关中继设备各自所属的相关基站与所述一个 或多个相关中继设备之间的相应的一条或多条通信路径的通信质量 信息;
- 确定装置, 用于根据所述一个或多个相关中继设备与所述本基 站对端设备之间的一条或多条相应的通信链路的通信质量信息, 与所 述一个或多个相关中继设备各自所属的相关基站与所述一个或多个 相关中继设备之间的相应的一条或多条通信路径的通信质量信息, 确 定所述相关基站与所述本基站对端设备之间的相应的一条或多条可 用的通信路径的通信质量信息。
20.根据权利要求 19所述的装置, 其特征在于, 所述第二获取装置 进一步包括:
- 第三获取装置, 用于获取所述一个或多个相关中继设备至所述 本基站对端设备的一条或多条相应的下行通信链路的通信质量信息; 还包括:
- 第四获取装置, 用于获取所述一个或多个相关中继设备各自所 属的相关基站至所述一个或多个相关中继设备之间的相应的一条或 多条下行通信路径的通信质量信息;
所述确定装置还用于:
- 根据所述一个或多个相关中继设备至所述本基站对端设备的一 条或多条相应的下行通信链路的通信质量信息, 与所述一个或多个相 关中继设备各自所属的相关基站至所述一个或多个相关中继设备之 间的相应的一条或多条下行通信路径的通信质量信息, 确定所述相关 基站与所述本基站对端设备之间的相应的一条或多条可用的下行和 / 或上行通信路径的通信质量信息。
21.根据权利要求 20所述的装置, 其特征在于, 所述第三获取装置 还用于:
- 根据来自所述一个或多个相关中继设备的下行信号, 确定所述 一个或多个相关中继设备至所述本基站对端设备的相应的下行通信 链路的通信质量信息。
22.根据权利要求 20或 21所述的装置, 其特征在于, 所述第四获 取装置还用于:
- 接收来自所述一个或多个相关中继设备的, 相应的中继设备所 属的相关基站至相应的相关中继设备的一条或多条相应的下行通信 路径的下行通信质量信息。
23.根据权利要求 19所述的装置, 其特征在于, 所述第二获取装置 进一步包括:
- 第五获取装置, 用于获取所述本基站对端设备至所述一个或多 个相关中继设备的一条或多条相应的上行通信链路的通信质量信息; 还包括:
- 第六获取装置, 用于获取所述一个或多个相关中继设备至所述 一个或多个相关中继设备各自所属的相关基站至的相应的一条或多 条上行通信路径的通信质量信息;
所述确定装置还用于:
- 根据所述本基站对端设备至所述一个或多个相关中继设备的一 条或多条相应的上行通信链路的通信质量信息, 与所述一个或多个相 关中继设备至所述一个或多个相关中继设备各自所属的相关基站至 的相应的一条或多条上行通信路径的通信质量信息, 确定所述相关基 站与所迷本基站对端设备之间的相应的一条或多条可用的上行和 /或 下行通信路径的通信质量信息;
24.根据权利要求 23所述的装置, 其特征在于, 所述第五获取装置 还用于: - 根据来自所述一个或多个相关中继设备的下行信号, 确定所述 一个或多个相关中继设备至所述本基站对端设备的相应的上行通信 链路的通信质量信息。
25. 根据权利要求 23或 24所述的装置, 其特征在于, 所述第六获 取装置还用于:
- 接收来自所述一个或多个相关中继设备的, 相应的相关中继设 备至所述一个或多个相关中继设备各自所属的相关基站至的相应的 一条或多条上行通信路径的通信质量信息。
26.根据权利要求 18至 25中任一项所述的装置, 其特征在于, 所 述第二获取装置进一步包括:
- 第七获取装置, 用于当一个或多个相关基站直接覆盖所述本基 站对端设备时, 获取所迷一个或多个相关基站与所述本基站对端设备 之间的相应的一条或多条通信链路的通信质量信息。
27.根据权利要求 26所述的装置, 其特征在于, 所述第七获取装置 还用于:
- 根据来自所述直接覆盖所述本基站对端设备的一个或多个相关 基站的各自的下行信号, 确定所述一个或多个相关基站至所述本基站 对端设备的相应的一条或多条可用的下行通信链路的通信质量信息。
28.根据权利要求 27所述的装置, 其特征在于, 所述第七获取装置 还用于:
- 接收来自所述直接覆盖所述本基站对端设备的一个或多个相关 基站的, 相应的相关基站至所述本基站对端设备的相应的一条或多条 上行通信链路的通信质量信息。。
29.根据权利要求 18至 28中任一项所述的装置, 其特征在于, 所 述基站对端设备包括中继设备或移动终端。
30.根据权利要求 29所述的装置, 其特征在于, 还包括:
- 汇报装置, 用于将所述选定通信路径的相关信息汇报给所述选 定下行通信路径对应的基站, 或者本基站对端设备目前所属的基站。
31.根据权利要求 18至 28中任一项所述的装置, 其特征在于, 所 述基站对端设备包括中继设备, 所述第一获取装置还用于:
- 获取本中继设备所属的基站与所述本中继设备之间的相应的 一条或多条可用的通信路径的通信质量信息;
所述确定装置还用于:
- 根据所述本中继设备所属的基站与所述本中继设备之间的相 应的一条或多条可用的通信路径的通信质量信息, 从中选择通信质量 较优的一条或多条可用的通信路径为所述本中继设备所属的基站与 所述本中继设备之间的选定通信路径;
该装置还包括:
- 提供装置, 用于将所述选定通信路径的相关信息提供给本中继 设备直接覆盖的基站对端设备。
32.根据权利要求 18至 31 中任一项所述的装置, 其特征在于, 所 述通信质量信息包括其对应的通信路径的等效路径质量信息。
33.根据权利要求 32所述的装置, 其特征在于, 所述等效路径质量 信息包括等效频谱效率, 和 /或等效信号与噪声加干扰比。
34.根据权利要求 18至 33中任一项所述的装置, 其特征在于, 所 述无线通信网络包括 WiMA 网络。
35.—种无线通信网络的基站对端设备, 其特征在于, 包括根据权 利要求 18至 34所述的装置。
PCT/CN2008/001252 2008-07-01 2008-07-01 无线网络中基站对端设备选择通信路径的方法这装置 WO2010000091A1 (zh)

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