WO2007128229A1 - Procédé d'accès, station de relais, station de base et système d'un réseau d'accès à relais multisaut sans fil - Google Patents

Procédé d'accès, station de relais, station de base et système d'un réseau d'accès à relais multisaut sans fil Download PDF

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Publication number
WO2007128229A1
WO2007128229A1 PCT/CN2007/001449 CN2007001449W WO2007128229A1 WO 2007128229 A1 WO2007128229 A1 WO 2007128229A1 CN 2007001449 W CN2007001449 W CN 2007001449W WO 2007128229 A1 WO2007128229 A1 WO 2007128229A1
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WO
WIPO (PCT)
Prior art keywords
station
mobile station
relay
base station
relay station
Prior art date
Application number
PCT/CN2007/001449
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English (en)
Chinese (zh)
Inventor
Jimin Liu
Shan Jin
Erwu Liu
Gang Shen
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Alcatel Lucent
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Filing date
Publication date
Application filed by Alcatel Lucent filed Critical Alcatel Lucent
Publication of WO2007128229A1 publication Critical patent/WO2007128229A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations

Definitions

  • Access method for wireless multi-hop relay access network
  • the present invention relates generally to broadband radio access networks, and more particularly to a method of accessing a wireless multi-hop relay access network, and a relay station, base station, and wireless communication system using the access method.
  • Background technique
  • WiMAX World Interoperability for Microwave Access
  • Wi-Fi is a wireless LAN access technology with a signal transmission radius of only a few hundred meters.
  • WiMAX is a wireless metropolitan area network access technology with a signal transmission radius of 50 kilometers, which can basically cover the suburbs. Thanks to this long-distance transmission feature, WiMAX will not only solve the wireless access technology, but also be a wireless extension of wired network access (Cable, DSL (Digital Subscriber Line)), which can easily realize the network in remote areas. connection.
  • the base station In a broadband radio access network, the base station is responsible for controlling and allocating radio resources for each user terminal or mobile station. Some application scenarios may be considered, such as shadowing holes in a cell of a base station, deployment of a base station in a low-density area, and deployment of a micro-cell base station in a large amount, which is not economical or the like.
  • Relay stations can be used to cover shadow holes and extend coverage, and are cost effective. In other cases, the relay station can also be used to improve the propagation environment of the space and thereby enhance throughput.
  • the mobile station must first pass through the network access procedure in order to be identified by the base station.
  • a relay station is introduced between the base station and the mobile station, the network access process changes, and some problems also arise. For example, when a mobile station is outside the cell or in a shadow hole, the mobile station cannot receive the base because The downlink broadcast information of the station cannot start the network access process as usual.
  • the relay station has to relay control messages between the base station and the mobile station. Therefore, there must be a new mechanism for the network access procedure of the mobile station and the relay station, and considering the backward compatibility of the mobile station.
  • the first problem that exists is the mobile station attribution problem, ie whether the mobile station is home to the base station or the relay station.
  • the mobile station attribution problem is related to resource allocation on the base station. If the mobile station is home to the relay station, the base station should first transmit the data traffic to the relay station and then forward it to the mobile station by the relay station. Although the introduction of the relay station can increase the data transmission rate on the two links between the base station-mobile station and the mobile station-base station, the base station allocates duplicate resources for the mobile station. Therefore, it is necessary to fully consider the resource allocation efficiency change brought about by the introduction of the relay station in the mobile station network access process. Another consideration relates to the power consumption of the mobile station.
  • the mobile station When the mobile station is in the cell edge or deep fading area, the mobile station must adjust to the maximum transmit power. However, the mobile station's battery will be exhausted in a much shorter period of time than usual. After the introduction of the relay station in the air link between the base station and the mobile station, the energy consumption of the mobile station is greatly reduced. This is useful for transferring the mobile station's ownership from the base station to the repeater.
  • the relay station should send synchronization and broadcast information. If the mobile station can receive synchronization and broadcast information from the base station without the need for a relay station to participate, the relay station can be used to improve the modulation coding rate of the uplink and downlink of the mobile station, or to reduce the transmission power of the mobile station. If it is otherwise, the relay station will send synchronization and broadcast information to the mobile station, enabling the mobile station to perform the network access procedure.
  • the present invention focuses on the use of a method of combined detection to complete the basic network access mechanism of the relay station and the mobile station.
  • the base station collects the signal quality measurement results received on the relay station and the base station, and the downlink burst packet information that can be supported in the control message sent on the mobile station, thereby comprehensively evaluating the parameters to the mobile station attribution and whether the relay station forwards the broadcast.
  • the information draws conclusions.
  • the present invention can be widely applied to a broadband wireless access network based on a relay station.
  • the invention is first implemented by a network access method of a relay access network.
  • the relay access network includes a base station, a relay station, and a mobile station, and the network access method includes the following steps: a relay station registration step, wherein the relay station accesses a network, and indicates to the base station that it is a relay station;
  • a mobile station synchronization and initialization step wherein the mobile station synchronizes with a downlink channel of the base station, and transmits a ranging request message using a dedicated resource allocated by the base station;
  • a monitoring step wherein the relay station monitors a signal quality parameter of the mobile station
  • a filtering step wherein determining whether the mobile station is an active mobile station of the relay station, and forwarding the ranging request message and signal quality parameter of the mobile station to the mobile station when determining that the mobile station is an active mobile station of the relay station
  • the base station
  • a collecting step wherein the base station collects signal quality parameters directly from the mobile station and signal quality parameters monitored by the relay station;
  • a merge detection step wherein the base station synthesizes the signal quality parameters for combined detection to determine whether the mobile station is attributed to the base station or to the relay station.
  • the object of the invention is also achieved by a relay station for a relay access network.
  • the relay access network includes a base station, a relay station, and a mobile station, and the relay station includes:
  • a receiver for receiving and monitoring signal quality parameters of the mobile station and for receiving a message from the base station
  • a filtering unit configured to determine whether the mobile station is an active mobile station
  • Transmitter for:
  • the ranging response message of the base station received by the receiver is forwarded to the mobile station and the synchronization and broadcast information is transmitted.
  • the object of the invention is also achieved by a base station of a relay access network.
  • the relay access network includes a base station, a relay station, and a mobile station, and the base station includes:
  • a receiver for collecting signal shield parameters directly from the mobile station and signal quality parameters of the mobile station monitored by the relay station;
  • a transmitter configured to return a ranging response message to the mobile station when the merge detecting unit determines that the mobile station belongs to the base station, or determine, at the merge detecting unit, that the mobile station belongs to the The ranging response message is returned to the relay station when the relay station is described.
  • the object of the invention is also achieved by a wireless communication system.
  • the system includes: One or more mobile stations;
  • the relay station according to the present invention is for forwarding a message between the mobile station and the base station to increase the throughput of the mobile station and/or to extend the coverage of the base station.
  • One advantage of the present invention is backward compatibility.
  • the mobile station does not apply any changes to the base station cell where the relay station exists.
  • the mobile station only needs to use the original network access and initialization process to complete the network access, and does not know the existence of the relay station.
  • Another advantage of the present invention is the ability to efficiently increase mobile station throughput and optimize battery life of the mobile station.
  • the relay station monitors the signal quality of the ranging request message. If the signal quality is not good, the ranging request message will not be forwarded to the base station. This can avoid useless bandwidth consumption between the relay station and the base station.
  • the combined detection method the battery life of the mobile station is increased due to the presence of the relay station. All of these controls come from the base station.
  • Another advantage of the present invention is that it enables self-configuration of the relay station.
  • the base station will decide whether or not the relay station needs to send synchronization and broadcast information. For example, if the relay station enters the cell from outside the cell, the relay station is preferably selected to function to enhance throughput.
  • variations of the present invention can also support relay station selection procedures as well as relay station mobility procedures.
  • the solution of the present invention is independent of the frame structure employed by the relay station, that is, the present invention is a more general method. Therefore, the scope of use of the present invention is not limited to the IEEE 802.16 standard.
  • FIG. 1 is a schematic flowchart of a method for accessing a wireless network in the prior art
  • FIG. 2 is a schematic structural diagram of a wireless communication system employing the method of the present invention
  • Figure 3 is a schematic structural view of a relay station in accordance with the present invention.
  • FIG. 4 is a schematic structural diagram of a base station according to the present invention.
  • FIG. 5 is a schematic flowchart of a network access method for a wireless multi-hop relay access network according to a first embodiment of the present invention
  • FIG. 6 is a schematic flowchart of a network access method for a wireless multi-hop relay access network according to a second embodiment of the present invention
  • Figure ⁇ is a schematic flowchart of a network intrusion method for a wireless multi-hop relay access network according to a third embodiment of the present invention
  • FIG. 8 is a schematic flowchart of a network loading method for a wireless multi-hop relay access network according to a fourth embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of a network intrusion method for a wireless multi-hop relay access network according to a fifth embodiment of the present invention.
  • FIG. 10 is a schematic flowchart of a network access method for a wireless multi-hop relay access network according to a sixth embodiment of the present invention.
  • FIG. 11 is a schematic flowchart of a network access method for a wireless multi-hop relay access network according to a seventh embodiment of the present invention. detailed description
  • FIG. 1 is a schematic flowchart of a method for accessing a wireless network in the prior art.
  • the mobile station synchronizes with the downlink channel of the base station and transmits a ranging request message to the base station using dedicated resources.
  • the base station transmits a ranging response message to the mobile station.
  • the access process ends.
  • FIG. 1 is merely exemplary, it can be easily seen that the wireless network access method shown in FIG. 1 does not involve a relay station.
  • a cell such as a base station has a small number of shadowing holes, or a base station is deployed in a low-density area, at which point the mobile station cannot communicate properly.
  • the mobile station should adjust the transmission power to the maximum value. At this time, the battery power is exhausted in a short time compared with the normal case.
  • FIG. 2 is a schematic block diagram of a wireless communication system 200 employing the method of the present invention. Only the illustration of communication between the base station 220, the relay station 210, and the mobile station 230 participating in the access procedure is shown. As shown in FIG. 2, mobile station 230 can communicate directly with base station 220 and can also communicate with base station 220 via relay station 210. Whether or not the relay station 210 is introduced in the access procedure of the mobile station 230 is determined according to the merge detection described below with reference to FIG. Note that this figure is only illustrative, and more components should be included in the actual wireless communication system.
  • FIG. 3 is a schematic block diagram of a relay station 210 in accordance with the present invention. Only the receiver 211, the filtering unit 212, and the transmitter 213 are shown in the figure. Receiver 211 is operative to monitor signal quality parameters of mobile station 230. In one embodiment of the invention, filtering unit 212 is operative to determine if mobile station 230 is an active mobile station. The transmitter 213 is configured to indicate to the base station 220 that the relay station 210 is a relay station for forwarding the ranging request message to the base station after determining that the mobile station 230 is an active mobile station. Station 220, and for forwarding a ranging response message from base station 220 to mobile station 230 and transmitting synchronization and broadcast information when mobile station 230 is home to relay station 210.
  • receiver 211 monitors the signal quality parameters of mobile station 230 by receiving an uplink data burst or ranging request message.
  • the filtering unit 212 determines that the active mobile station 230 includes measuring the signal quality or power of the mobile station 230 based on the base station 220 downlink broadcast information in the plurality of frames, and wherein if the mobile station 230 The mobile station 230 is determined to be the active mobile station 230 if the signal quality or power is above a certain threshold, or the mobile station 230 is determined to be the inactive mobile station if the signal quality or power of the mobile station 230 is below a certain threshold. 230.
  • filtering unit 212 also estimates the time offset between active mobile station 230 and relay station 210. In another embodiment of the present invention, the filtering unit 212 also converts the ranging request message of the active mobile station 230 into a MAC message or forwards it in the ranging subchannel of the relay station 210 for forwarding in one frame. The ranging request message of the active mobile station 230. In another embodiment of the invention, transmitter 213 indicates to base station 220 that relay station 210 is a relay station by transmitting a MAC message to base station 220. Note that this figure is only illustrative and more components should be included in the actual relay station.
  • receiver 221 is operative to collect signal quality parameters directly from mobile station 230 and signal quality parameters of mobile station 230 monitored by relay station 210.
  • the merge detection unit 222 is configured to synthesize these signal quality parameters for combined detection to determine whether the mobile station 230 is assigned to the base station 220 or the relay station 210.
  • these signal quality parameters are provided in the form of signal quality reports. These signal quality parameters may be transmit power, signal to interference ratio, signal to noise ratio, packet error rate, bit error rate, and/or carrier to interference ratio.
  • the transmitter 213 is configured to return a ranging response message to the mobile station 230 when the merge detecting unit 222 determines to assign the mobile station 230 to the base station 220, or return to the relay station 210 when the merge detecting unit 222 determines that the mobile station 230 belongs to the relay station 210. Ranging response message.
  • determining whether the merge detecting unit 222 assigns the mobile station 230 to the base station 220 or the relay station 210 includes:
  • the receiver 221 receives only the ranging request message from the mobile station 230, it is determined that the mobile station 230 is attributed to the base station 220;
  • the receiver 221 receives only the ranging request message of the mobile station 230 forwarded by the relay station 210, it is determined that the mobile station 230 is attributed to the relay station 210; or
  • the request message and the ranging request message of the mobile station 230 forwarded by the relay station 210 are based on the signal quality parameter directly from the mobile station 230, the signal quality parameter monitored by the relay station 210, and the ranging request message transmitted by the mobile station 230. With its acceptable downlink burst packet information, it is determined whether the mobile station 230 is assigned to the base station 220 or the relay station 210.
  • the merge detecting unit 222 determines whether to assign the mobile station 230 to the base station 220 or the relay station 210 includes estimating the location of the relay station 210, and wherein if the estimated relay station 210 The mobile station 230 is attributed to the relay station 210 when the location is near the edge of the cell or near the shadow hole.
  • the determining by the base station 220 whether the mobile station 230 belongs to the base station 220 or the relay station 210 includes:
  • the mobile station 230 throughput is used as a measure, then when R! ⁇ 2R 2 , it is determined that the mobile station 230 belongs to the base station 220, otherwise it is determined that the mobile station 230 belongs to the relay station 210; or
  • base station 220 also includes a database 224 for storing a list of active mobile stations 230. Note that this figure is only illustrative and more components should be included in the actual base station.
  • FIG. 5 is a schematic flowchart of a network access method for a wireless multi-hop relay access network according to a first embodiment of the present invention.
  • the relay station 210 accesses the network, and indicates to the base station 220 that the relay station 210 is a relay station.
  • base station 220 will allocate radio resources to the relay station 210 over the air interface so that the relay station 210 can relay user traffic or control messages for mobile station 230.
  • the relay station registration step 501 affects the resource allocation of the base station 220 to the relay station 210.
  • relay station 210 synchronization and initialization is similar to synchronization and initialization of conventional mobile station 230, except that relay station 210 will indicate to base station 220 that it is a relay station and report specific information to base station 220 in a particular manner.
  • the relay station 210 transmits a MAC (Media Access Control) management message to the base station 220 to indicate that it is a relay station.
  • the base station 220 identifies the relay station 210 and then assigns the relay station 210 a particular radio resource for service relay.
  • the relay station 210 is divided into The allocated radio resource can be one or more symbols or one or more time slots in a frame.
  • mobile station 230 synchronizes with the downlink channel of base station 220 and transmits a ranging request message to base station 220 using dedicated resources.
  • Mobile station synchronization and initialization step 502 affects the connection of mobile station 230.
  • the mobile station 230 only needs to be processed in accordance with a conventional flow. In other words, the relay station 210 is transparent to the mobile station 230.
  • the processing is identical to the normal process.
  • mobile station 230 should synchronize to the downlink channel of base station 220 and learn the uplink channel characteristics through the MAC management message.
  • the mobile station 230 then transmits a ranging request message to the base station 220 using dedicated resources.
  • these dedicated resources may be multiple carriers, time slots, subchannels, OFDM symbols.
  • the mobile station 230 does not need to know whether the ranging request message will be received by the relay station 210 or the base station 220.
  • the relay station 210 monitors the signal quality parameters of the mobile station 230. It is possible that a plurality of mobile stations 230 simultaneously transmit ranging request messages, and the relay station 210 monitors these ranging request messages. In one embodiment of the invention, relay station 210 monitors the signal quality parameters of mobile station 230 by receiving an uplink data burst or ranging request message.
  • Relay station 210 measures the signal power of these ranging request messages. In another embodiment of the invention, relay station 210 also estimates the time offset between mobile station 230 and relay station 210. A plurality of data exchanges for the ranging process can be performed between the relay station 210 and the mobile station 230.
  • the relay station 210 determines that the mobile station 230 is an active mobile station and forwards its ranging request message to the base station 220.
  • the ranging request message of the active mobile station 230 may be converted into a MAC message or forwarded in the ranging subchannel of the relay station 210 to A ranging request message for the active mobile station 230 is forwarded in one frame.
  • the base station 220 collects signal quality parameters directly from the mobile station 230 and signal quality parameters monitored by the relay station 210.
  • the collecting step 505 further includes generating and maintaining a list of active mobile stations 230 on the base station 220.
  • the base station 220 synthesizes these signal quality parameters for combined detection to determine whether the mobile station 230 is to be attributed to the base station 220 or the relay station 210.
  • base station 220 measures the signal power of the ranging request message from mobile station 230 to determine if relay station 230 needs to be relayed.
  • the base station 220 If the direct mobile station-base station communication signal quality is good enough, there is no need to relay the mobile station 230, and the base station 220 only needs to return a ranging response message to the mobile station 230, regardless of the presence of the relay station 210. All subsequent steps are the same as the conventional steps of the prior art. In an embodiment of the invention, if When the mobile station 230 is located near the cell edge or the shadow hole, the base station 220 cannot receive the ranging request message from the mobile station 230, but can only receive the ranging request message of the mobile station 230 forwarded by the relay station 210.
  • the mobile station 230 must be attributed to the base station 220 or the relay station 210 based on the signal quality report from the relay station 210 and the required downlink burst characteristic data that the mobile station 230 can receive.
  • the base station 220 integrates the signal quality parameter of the ranging request message directly from the mobile station 230, the signal quality parameter of the ranging request message of the mobile station forwarded by the relay station 210, and the ranging request transmitted by the mobile station 230.
  • the acceptable downlink burst packet information carried in the message determines whether the mobile station 230 is within the coverage area of the relay station 210.
  • the signal quality parameters are provided in the form of a signal quality report.
  • the signal quality parameters may be, but are not limited to, transmit power, signal to interference ratio, signal to noise ratio, packet error rate, bit error rate, and carrier to interference ratio. These parameters are important for estimating the position of the mobile station.
  • the signal quality report is only an exemplary parameter for measurement and reporting, and the device provider can select other parameters as needed.
  • base station 220 after completing the merge detection step, base station 220 will return south mobile station 230 with a ranging response message with a power adjustment level.
  • the ranging response message can be forwarded by the relay station 210 to the mobile station 230.
  • the base station 220 collects signal quality measurements at the relay station 210 and at the base station 220, and transmits the control messages transmitted by the mobile station 230 in bursts on the downlink.
  • the feature data information then begins to make a final determination of the mobile station 230 connecting and forwarding the relay station 210 broadcast information. Then, as shown in FIG. 5, the process ends. Note that this figure is merely exemplary, and the actual wireless network access procedure may include more steps.
  • the merge detection step 506 shown in FIG. 5 includes:
  • step 601 if the base station 220 only receives the ranging request message from the mobile station 230, it determines in step 602 that the mobile station 230 is attributed to the base station 220;
  • step 603 if the base station 220 only receives the ranging request message of the mobile station 230 forwarded by the relay station 210, it is determined in step 604 that the mobile station 230 is attributed to the relay station 210; or
  • step 605 if the base station 220 simultaneously receives the ranging request message from the mobile station 230 and the ranging request message of the mobile station 230 forwarded by the relay station 210, then in step 606 the base station 220 is based on the signal directly from the mobile station 230.
  • the quality parameter, the signal quality parameter monitored by the relay station 210, and its acceptable downlink burst packet information carried in the ranging request message transmitted by the mobile station 230 determine whether the mobile station 230 is attributed to the base station 220 or the relay station 210. Except for this, the access procedure shown in the figure is the same as the access procedure shown in FIG. 5, and thus the description will not be repeated. Note that this figure is merely exemplary, and the actual wireless network access procedure may include more steps.
  • FIG. 7 is a schematic flow chart of a network access method for a wireless multi-hop relay access network in accordance with a third embodiment of the present invention. If it is determined in the merge detection step 506 shown in FIG. 5 that the mobile station 230 is assigned to the base station 220 (step 701), the base station 220 returns a ranging response message to the mobile station 230 in step 702, or if in FIG. In the merge detection step 506 shown, it is determined that the mobile station 230 is attributed to the relay station 210 (step 703), then in step 704 the base station 220 returns a ranging response message to the relay station 210, and the relay station 210 forwards the ranging response message to the mobile station. 230.
  • the base station 220 adjusts the RF (radio frequency) power included in the ranging response message according to the signal level measured in the relay station 210.
  • Level assignment Since all uplink transmission data from these mobile stations 230 is first received by the relay station 210 and forwarded to the base station 220, the power level of the mobile station 230 should be adjusted to accommodate the transmission of the mobile station-relay station. In another embodiment of the invention, the same adjustments can be made to the time offset in the mobile station 230.
  • FIG 8 is a schematic flow chart of a network access method for a wireless multi-hop relay access network in accordance with a fourth embodiment of the present invention.
  • the relay station 210 if it is determined in the merge detecting step that the mobile station 230 is attributed to the relay station 210 (step 703), then in step 801, the relay station 210 also transmits synchronization and broadcast information. Except for this, the access procedure shown in the figure is the same as the access procedure shown in Fig. 7, and therefore the description will not be repeated. Note that this figure is only exemplary, and the actual wireless network access procedure can include more steps.
  • Figure 9 is a schematic flow chart of a network access method for a wireless multi-hop relay access network in accordance with a fifth embodiment of the present invention.
  • the relay station 210 determines that the active mobile station 230 includes measuring the signal quality or power of the mobile station 230 based on the base station 220 downlink broadcast information in the plurality of frames, and wherein:
  • step 901 If it is determined in step 901 that the signal quality or power of the mobile station 230 is above a certain threshold, the mobile station 230 is determined to be the active mobile station 230 in step 902, and then the process proceeds to step 505 shown in FIG. 5;
  • step 901 If the signal quality or power of the mobile station 230 is removed below the specific threshold in step 901, then The mobile station 230 is determined to be the inactive mobile station 230 in step 903, and then, as shown in Fig. 5, the processing ends.
  • FIG. 10 is a schematic flowchart of a network access method for a wireless multi-hop relay access network according to a sixth embodiment of the present invention.
  • the merge detection step 506 shown in FIG. 5 includes:
  • step 1001 base station 220 estimates the location of relay station 210;
  • step 1002 If it is determined in step 1002 that the estimated location of the relay station 210 is near the cell edge or the shadow hole, the mobile station 230 is attributed to the relay station 210 in step 1003.
  • the algorithm for estimating the location of the relay 210 can also be determined by the equipment provider as needed.
  • the access procedure shown in the figure is the same as the access procedure shown in Figure 5, and therefore will not be repeated. Note that this figure is merely exemplary, and the actual wireless network access procedure can include more steps.
  • the device provider can determine the merge detection algorithm as needed.
  • the base station 220 can determine whether the mobile station 230 should be attributed to the base station 220 or the relay station 210, or to which relay station 210 the mobile station 230 belongs, based on these combined detection algorithms, incorporating specific criteria.
  • FIG. 11 is a schematic flowchart of a network access method for a wireless multi-hop relay access network according to a seventh embodiment of the present invention, wherein it is determined whether the mobile station belongs to a base station or belongs to a relay station according to the combined detection.
  • the system is configured taking into account the throughput or power consumption of the mobile station 230.
  • the merge detection step 506 shown in FIG. 5 includes:
  • step 1101 an average data transmission rate when the relay station 210 is present or a power consumption of the mobile station and an average data transmission rate R 2 when the relay station 210 is not available or a power consumption P 2 of the mobile station are calculated;
  • step 1103 it is determined in step 1103 that the mobile station 230 is attributed to the base station 220 (because the mobile station 230 is attributable to the relay station 210 at this time The throughput will be increased), otherwise it is determined in step 1104 that the mobile station 230 is attributed to the relay station 210.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)

Abstract

L'invention concerne un procédé d'accès à un réseau mis en oeuvre dans un réseau d'accès à relais. Ce réseau d'accès à relais comprend une station de base, une station relais et une station mobile. Le procédé d'accès à un réseau de l'invention comprend les étapes suivantes: une étape d'enregistrement de relais; une étape de synchronisation et d'initialisation de station mobile; une étape de surveillance dans laquelle la station relais surveille les paramètres de qualité de signal de la station mobile; une étape de filtrage dans laquelle, une fois qu'une station mobile est déterminée en tant que station mobile active de la station relais, une demande de classement et des paramètres de qualité du signal de station mobile sont transmis à la station de base; une étape de recueil de paramètres dans laquelle la station de base recueille les paramètres de qualité de signal directement de la station mobile et de la station relais; et une étape de mesure combinée dans laquelle la station de base synthétise ces paramètres de qualité de signal pour une mesure combinée, et détermine si la station mobile appartient à la station mobile ou appartient à la station relais. La station relais, la station de base et le système de communication sans fil faisant appel au procédé de l'invention sont également décrits dans la description.
PCT/CN2007/001449 2006-04-29 2007-04-28 Procédé d'accès, station de relais, station de base et système d'un réseau d'accès à relais multisaut sans fil WO2007128229A1 (fr)

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CN200610026262.0 2006-04-29
CN2006100262620A CN101064901B (zh) 2006-04-29 2006-04-29 无线多跳中继接入网的接入方法、中继站、基站和系统

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CN101562557B (zh) * 2008-01-11 2011-09-21 中兴通讯股份有限公司 多跳中继网络中map和相应数据的关联方法
CN101527947B (zh) * 2008-03-06 2013-01-23 上海贝尔阿尔卡特股份有限公司 无线中继网络中为移动终端选择通信路径的方法和装置
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