WO2010124458A1 - 一种寻呼方法、位置更新方法及装置 - Google Patents

一种寻呼方法、位置更新方法及装置 Download PDF

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Publication number
WO2010124458A1
WO2010124458A1 PCT/CN2009/071541 CN2009071541W WO2010124458A1 WO 2010124458 A1 WO2010124458 A1 WO 2010124458A1 CN 2009071541 W CN2009071541 W CN 2009071541W WO 2010124458 A1 WO2010124458 A1 WO 2010124458A1
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WO
WIPO (PCT)
Prior art keywords
relay station
tracking area
base station
terminal
area identifier
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2009/071541
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English (en)
French (fr)
Inventor
张涛
蔺波
熊新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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
Publication date
Priority to JP2012507571A priority Critical patent/JP5462357B2/ja
Priority to EP09843870.8A priority patent/EP2426960B1/en
Priority to PCT/CN2009/071541 priority patent/WO2010124458A1/zh
Priority to EP13195335.8A priority patent/EP2712215B1/en
Priority to RU2011148131/08A priority patent/RU2491787C2/ru
Priority to CN200980157587.4A priority patent/CN102342133B/zh
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to BRPI0924660-6A priority patent/BRPI0924660B1/pt
Publication of WO2010124458A1 publication Critical patent/WO2010124458A1/zh
Priority to US13/283,200 priority patent/US8837325B2/en
Anticipated expiration legal-status Critical
Priority to RU2013119381/08A priority patent/RU2541939C2/ru
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W68/00User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02Arrangements for increasing efficiency of notification or paging channel
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W88/00Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08Access point devices
    • H04W88/085Access point devices with remote components

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a paging method, a location update method, and a device. Background technique
  • ITU-R ITU-Radiocommunication Sector, ITU Radiocommunication Sector
  • B3G Beyond 3G, 4th Generation Mobile Telecommunications
  • IMT-Advanced International Mobile Telecommunications - Advanced
  • 3GPP 3rd Generation Mobile Group
  • a wireless connection between a base station (eNodeB, eNB) and a terminal (User Equipment, UE) is a direct wireless connection, that is, a single-hop network.
  • the relay technology is to add one or more relay stations between the base station and the terminal, and is responsible for forwarding the wireless signals sent by the base station to the terminal.
  • a base station can serve multiple cells, and different cells are divided into different TAs (Tracking Areas) according to certain rules.
  • TAs Track Areas
  • the MME Mobility Management Entity
  • the MME finds all base stations associated with the TAs according to the current TA list of the terminal, and sends a paging message to the base stations.
  • the base station does not know the information of the TA to which the relay station belongs, and cannot know whether the paged terminal is currently camped in the own cell or in the cell of the lower relay station, the base station starts paging in the local cell.
  • a paging message is sent to all of the relay stations below it, causing the relay station to also start paging the particular terminal.
  • paging In order to page a specific terminal, paging needs to be performed in the cell of the base station and the cells of all the relay stations under the base station, which increases the signaling overhead of the system paging and wastes the paging resources of the system. Relative to the base station, since the relay station needs to allocate its paging resources on the two radio links from the terminal to the relay station and the relay station to the base station, the paging resources of the relay station are relatively scarce relative to the base station, so the paging resources are The waste problem is even more serious.
  • the base station broadcasts a system message in the tracking area to which the cell belongs, and the relay station directly forwards the system message to all terminals residing in the own cell. Since these terminals are loaded into the cell of the base station inside the relay station, these terminals are usually the first to enter the tracking area of the base station, so according to the existing protocol, all the terminals under the relay station perform a location update process.
  • the embodiment of the present invention provides a paging method, which is used to reduce signaling overhead of system paging and save paging resources of the system.
  • the method includes:
  • the tracking area identifier in the paging message is a tracking area identifier of the base station, the base station paging the terminal;
  • the base station instructs the relay station to page the terminal.
  • the embodiment of the present invention further provides a location update method, which is used to reduce signaling load caused by location update, and the method includes:
  • the relay station generates a system message, where the system message includes a tracking area identifier of the relay station;
  • the relay station broadcasts the system message, triggering a terminal that enters the cell under the jurisdiction of the relay station to initiate a location update request.
  • the embodiment of the present invention further provides a paging method, which is used to reduce signaling overhead of system paging and save paging resources of the system.
  • the method includes:
  • the mobility management entity receives a location update request message of the terminal, where the location update request message carries a tracking area identifier of the relay station where the terminal resides;
  • the mobility management entity And updating, by the mobility management entity, the tracking area list of the terminal according to the tracking area identifier; the mobility management entity sends a paging message, where the paging message carries a tracking area list of the terminal.
  • the embodiment of the present invention further provides a base station, which is used to reduce the signaling overhead of the system paging and save the paging resources of the system.
  • the base station includes:
  • a receiving module configured to receive a paging message, where the paging message carries a tracking area identifier
  • a paging module configured to: when the tracking area identifier is the tracking area identifier of the base station, the paging terminal; When the tracking area identifier is the tracking area identifier of the relay station under the control of the base station, the relay station is instructed to page the terminal.
  • the embodiment of the present invention further provides a relay station, which is used to reduce signaling load caused by location update, and the relay station includes:
  • a generating module configured to generate a system message, where the system message includes a tracking area identifier of the relay station;
  • a broadcast module configured to broadcast the system message, triggering a terminal to initiate a location update request to enter a cell of the relay station.
  • the embodiment of the present invention further provides a communication system, which is used to reduce the signaling load caused by the location update.
  • the communication system includes the foregoing relay station, and further includes:
  • a base station configured to receive an identity identifier and a tracking area identifier of the relay station reported by the relay station;
  • a terminal configured to send a location update request message
  • the relay station is further configured to forward the location update request message of the terminal to the base station; and add the identity identifier of the relay station to the forwarded location update request message.
  • the embodiment of the present invention further provides a mobility management entity, which is used to reduce signaling paging of system paging and save paging resources of the system.
  • the mobility management entity includes:
  • a receiving module configured to receive a location update request message of the terminal, where the location update request message carries a tracking area identifier of the relay station where the terminal resides;
  • the base station receives the paging message, where the paging message carries the tracking area identifier; if the tracking area identifier in the paging message is the tracking area identifier of the base station, the base station paging the terminal; if the paging The tracking area identifier in the message is the tracking area identifier of the relay station under the control of the base station, and the base station instructs the relay station to page the terminal, by making the base station clear whether the terminal is currently camping in its own cell or staying in the relay station under its jurisdiction.
  • the targeted paging is performed on the terminal, which is compared with the technical solution of the paging terminal in the base station and the relay station under the jurisdiction in the prior art, thereby reducing the signaling overhead of the system paging and saving the paging resources of the system. .
  • the relay station generates a system message, where the system message includes a tracking area identifier of the relay station; the relay station broadcasts the system message, triggering a terminal to initiate a location update request to enter a cell of the relay station; and the terminal in the prior art
  • the tracking area identifier of the base station that receives the relay station broadcast when entering the cell under the jurisdiction is different, which can effectively reduce the signaling load caused by the frequent location update of a large number of terminals caused by the movement of the relay station.
  • the location update request message of the terminal that is received by the mobility management entity carries the tracking area identifier of the relay station where the terminal is located, which may facilitate the subsequent delivery of the paging message carrying the tracking area identifier of the relay station, so that the base station It is clarified that the terminal currently resides in the cell of the relay station under its jurisdiction, and performs targeted paging on the terminal, which is compared with the technical solution of the paging terminal of the base station and the relay station under the jurisdiction in the prior art, thereby reducing the system paging message. Increase overhead and save system paging resources.
  • FIG. 1 is a schematic diagram of a network scenario involved in an embodiment of the present invention
  • FIG. 2 is a flowchart of a paging method according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a method for updating a location according to an embodiment of the present invention.
  • FIG. 4, FIG. 5, and FIG. 6 are flowcharts of a specific example of a paging method according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a relay station according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a mobility management entity according to an embodiment of the present invention. detailed description The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. The illustrative embodiments of the present invention and the description thereof are intended to explain the present invention, but are not intended to limit the invention.
  • FIG. 1 is a schematic diagram of a network scenario according to an embodiment of the present invention.
  • the MME is the control network element responsible for initiating paging for the terminal in the network.
  • the existing control interface between the MME and the eNB is S1-MME.
  • the interface between the base station and the terminal in the original LTE network that is, the Uu interface, can be reused between the relay station and the terminal.
  • the relay station itself can be stationary or mobile.
  • the mobile relay station is installed on vehicles such as trains and buses to provide stable wireless network access services for passengers.
  • 1 ⁇ 1& ⁇ & and Relay_b are two fixed relay stations
  • Relay-c is a mobile relay station.
  • the eNB is a base station, and the above three relay stations are finally connected to the core network through the relay of the eNB.
  • the paging method process in the embodiment of the present invention may include:
  • Step 201 The base station receives a paging message, where the paging message carries a tracking area identifier.
  • Step 202a If the tracking area identifier in the paging message is a tracking area identifier of the base station, the base station pages the terminal.
  • Step 202b If the tracking area identifier in the paging message is a tracking area identifier of a relay station under the control of the base station, the base station instructs the relay station to page the terminal.
  • the base station can perform targeted paging by clarifying whether the terminal currently resides in its own cell or in the cell of the relay station under its jurisdiction, and the base station and the jurisdiction under the prior art Compared with the technical solution of paging terminals in the relay station, the paging process of the relay network is obviously optimized, the signaling overhead of the system paging is reduced, and the paging resources of the system are saved.
  • the base station may further include: The base station forwards the location update request message of the terminal, where the terminal resides in the cell under the control of the base station, and the tracking area identifier in the location update request message is the tracking area identifier of the base station; Residing in the cell under the jurisdiction of the relay station, the tracking area identifier in the location update request message is a tracking area identifier of the relay station.
  • the MME may update the tracking area list of the terminal according to the tracking area identifier carried in the location update request message.
  • the paging message may carry the identifier of the terminal and the tracking area list of the terminal.
  • the location update request message of the terminal carries the tracking area identifier of the relay station.
  • the location update request message is generated and sent by the terminal, and then forwarded to the MME by the relay station and the base station. Therefore, there may be multiple ways to carry the tracking area identifier of the relay station in the location update request message, for example, the relay station
  • the tracking area identifier is obtained by the terminal from the relay station and added to the location update request message; for example, the tracking area identifier of the relay station is added by the relay station to the location update request message; For another example, the tracking area identifier of the relay station is obtained by the base station from the relay station and added to the location update request message.
  • the terminal obtains the tracking area identifier of the relay station from the relay station, and may be: when the terminal enters the cell under the jurisdiction of the relay station, the terminal receives the relay station tracking area identifier broadcasted by the relay station. It can be seen that, in the prior art, when the terminal enters the cell under the jurisdiction of the relay station, the relay station broadcasts the tracking area identifier of the base station. In this embodiment, when the terminal enters the cell under the jurisdiction of the relay station, the relay station broadcasts the tracking of the relay station. Area ID. In the prior art, due to the movement of the relay station, the tracking area identifier of the base station broadcasted by the relay station is constantly changing, and the terminal will continuously initiate a location update request.
  • the present invention may further provide a location update method, where the process may include:
  • Step 301 The relay station generates a system message, where the system message includes a tracking area identifier of the relay station.
  • Step 302 The relay station broadcasts the system message, and triggers a terminal that enters a cell managed by the relay station to initiate a location update request.
  • the process shown in FIG. 3 is different from the tracking area identifier of the base station that receives the relay station broadcast when the terminal enters the jurisdiction of the cell in the prior art, and can effectively reduce the frequent location update of a large number of terminals caused by the movement of the relay station. Signaling load.
  • the location update method shown in FIG. 3 can be used alone or in combination with the paging method shown in FIG. 2.
  • the paging process of the relay network is optimized, and the search in the relay network is reduced.
  • the waste of resources is called; on the other hand, the problem that the location update signaling caused by the joining of the mobile relay station is overloaded is also prevented.
  • the base station may determine the first correspondence, and according to the first correspondence Determining, in the paging message, the tracking area identifier is the tracking area identifier of the local base station, or the tracking area identifier of the relay station under the control of the base station; wherein, the first correspondence relationship is between the relay station under the control of the base station and the tracking area of the relay station Correspondence.
  • the first correspondence may be stored by the base station to facilitate its determination, and may of course be stored by other devices, and the base station interacts with the device to implement the determining function. If the base station performs storage, the base station needs to obtain information about the tracking area of the relay station and the relay station. In an embodiment, the base station may receive the relay station identity identifier and the tracking area reported by the relay station after the relay station moves to the cell under the jurisdiction of the base station. Identification; then the received relay station identity and tracking area identifier are recorded in the first correspondence.
  • the first correspondence may be recorded in a mapping table, or a database, to facilitate the query.
  • An example of a paging method incorporating the location update method in the above embodiment will be described below.
  • 4 is a flowchart of a paging method in this example; in this example, the relay station Relay_c is a mobile relay station, and the terminal UE-i is a terminal under the mobile relay station, in order to complete the paging of the terminal UE-i, the entire process It can be divided into three phases, including:
  • Step 401 Relay_c moves into the cell of the eNB.
  • Step 402 Relay_c sends a control message Control_Message-1 to the eNB.
  • Control_Message-1 Relay_c reports its relay identity Relay_ID and tracking area identifier TA_c to the eNB.
  • Step 403a-b the eNB internally stores a mapping table of the mapping relationship between the tracking area and the relay station: (TA_Rate) mapping table, where the mapping table stores the first correspondence.
  • the eNB After receiving the Control_Message_1, the eNB first updates the (TA_Relay) mapping table according to the information therein, and then the eNB sends a control message on the S1-MME interface to the MME, for example, ENB-CONFIGURATION-UPDATE, this
  • the control message includes the identity identifier eNB ID of the eNB and the tracking area identifier TA_c of Relay_c.
  • the MME can know that the Relay-c is now camped in the cell of the eNB.
  • Step 404 A specific terminal UE-i enters a PP-C cell.
  • Step 405 The Relay_c broadcasts its own identity Relay-ID and tracking area identifier TA-c through the system message in its own cell.
  • Step 406 After receiving the system message broadcasted by the Relay-c, the UE_i sends a control message Tracking_Area_Update_Request to the Relay_c to initiate the location update process.
  • the Tracking_Area_Update_Request is defined in the existing standard, and includes the identity of the terminal UE_ID and the tracking area identifier TA-c.
  • Step 407 Relay_c does not process after receiving the message, but directly forwards it to Step 408: After receiving the message, the eNB does not process, but directly forwards it to the MME 0.
  • Step 409 The MME maintains a list of tracking areas for each UE. After receiving the Tracking-AreaJJpdate-Request sent by UE-i, the MME adds TA_c to the tracking area list TA_List_of_UE_i of UE_i.
  • TA_c the tracking area list TA_List_of_UE_i of UE_i.
  • Step 410 The MME receives a paging request from the core network to UE_i.
  • Step 411 The MME sends a paging message Paging to the eNB.
  • the Paging message includes the identity of the UE_i UE_ID and the tracking area list of the UE_i TA_List_of_UE_i.
  • Step 412 After receiving the Paging message, the eNB queries the TA-Relay mapping table according to the tracking area identifiers listed in the TA_List_of_UE_i.
  • Step 413 Because TA_List_of_UE_i is likely to include only TA-c, and does not include the tracking area identifier of the eNB and other relay stations under the eNB, the eNB may only send the paging message to Relay_c to start the pair.
  • Step 414 The Relay c pages the UE_i.
  • the first correspondence is the correspondence between the relay stations of the base station and the tracking area of the relay station.
  • the base station may also determine the second correspondence, and determine according to the second correspondence.
  • the tracking area identifier in the paging message is the tracking area identifier of the base station or the tracking area identifier of the relay station under the control of the base station; wherein, the second correspondence is the relay station under the control of the base station, the tracking area of the relay station, and the resident area Correspondence between terminals of the cell under the jurisdiction of the relay station.
  • the second correspondence may also be stored by the base station to facilitate its determination, and of course, may be stored by other devices, and the base station interacts with the device. It is time to determine the function. If the base station performs the storage, the base station needs to obtain the information about the relay station, the tracking area of the relay station, and the terminal that resides in the cell of the relay station. In one embodiment, the base station can move to the cell under the jurisdiction of the base station after the relay station moves. Receiving the relay station identity and the tracking area identifier reported by the relay station; and then recording the received relay station identity and the tracking area identifier into the second correspondence.
  • the second correspondence may also be updated by the base station according to the relay station identity, the relay station tracking area identifier, and the terminal identity in the location update request message.
  • the relay station identity can be added to the location update request message by the relay station.
  • the second correspondence can also be recorded in a mapping table, or database, to facilitate the query.
  • FIG. 5 is a flowchart of a method of paging in the present embodiment of FIG.;
  • Relay_a is a fixed relay station
  • UE- k is a terminal residing in the Relay_ a.
  • the whole process can still be divided into three different stages. The differences between the flow shown in FIG. 5 and the flow shown in FIG. 4 will be mainly described below.
  • step 501 to step 502 Relay_a automatically sends a control message Control_Message-1 to the eNB.
  • the definition and function of the control message are the same as the Control Message l in FIG. Different from FIG. 4, in step 503a, the eNB now internally maintains a tracking area, a mapping table of the relay station and the terminal (TA_Relay_UE), and the mapping table stores the second correspondence. After receiving Control_Message-1, the eNB adds the mapping relationship between Relay_a and other tracking areas TA_a to this mapping table.
  • the next phase one message (step 503b) and process are the same as in FIG.
  • step 504 to move within UE_k Relay- a cell, and is similar to FIG. 4, at step 505, Relay_ a broadcast their identity and the tracking area identity within the own cell in step 506,! ⁇ —! ⁇
  • the control message Tracking_Area_Update_Request is sent to Relay_a.
  • Relay_a processes the message to generate a control message Control_Message_2.
  • Control—Message_2 has one more parameter relative to Tracking_Area_Update_Request, that is, Relay_a's identity Relay-ID.
  • Relay a sends Control_Message_2, and after receiving Control_Message_2, the eNB updates the (TA_Relay-UE) mapping table according to the information contained in the message, so that the eNB knows that UE_k is now resident.
  • the community of Relay_a In the community of Relay_a.
  • step 512 after receiving the Paging message, the eNB queries the (TA_Relay-UE) mapping table to determine that the UE-k is now camped in Relay-a. In the cell, therefore, in step 513, the eNB directly sends a Paging message to Relay_a, and then proceeds to step 514, and Relay_a starts paging for UE_k in its own cell.
  • the eNB queries the (TA_Relay-UE) mapping table to determine that the UE-k is now camped in Relay-a. In the cell, therefore, in step 513, the eNB directly sends a Paging message to Relay_a, and then proceeds to step 514, and Relay_a starts paging for UE_k in its own cell.
  • the location update request message of the terminal may be an access domain message.
  • An example is given below. As shown in Fig. 6, the paging process differs from that of Fig. 5 only in phase two, so phase one and phase three are omitted in Fig. 6.
  • step 601 UE_k moves into the cell of Relay_a; in step 602, UE_k receives the system message of Relay_a; and in step 603, UE_k does not send message Tracking_Area_Update_Request to Relay_a. Instead, a new defined message Control_Message_3 is sent. Because Tracking_Area_Update_Request is a non-access domain message, in Figure 5, to enable Relay-a to process this message, a large change to Relay_a is required.
  • the newly designed message Control_Message-3 in Figure 6 is an access domain message, so Relay_a can process this message without much modification. Similar to the Tracking Area Update Request, Control_Message-3 includes the identity identifier UE_ID of UE k and its tracking area identifier TA_a. Subsequent steps 604-606 are similar to FIG.
  • the embodiment of the present invention can also be applied to a multi-hop relay network, that is, the relay station can be reconnected under the relay station in the scene 1.
  • the above technical key points and protection points still apply, but the base station in the description itself is also a relay station.
  • a person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium.
  • the method may include all or part of the steps in the foregoing embodiment, and the storage medium may include: a ROM, a RAM, a magnetic disk, an optical disk, and the like.
  • the base station, the relay station, and the communication system are also provided in the embodiment of the present invention, as described in the following embodiments. Since the principle of solving the problem of these devices is similar to the paging method or the location update method, the implementation of these devices can be referred to the implementation of the method, and the repeated description will not be repeated.
  • the embodiment of the present invention provides a base station, and the structure thereof is as shown in FIG. 7 , and may include: a receiving module 701, configured to receive a paging message, where the paging message carries a tracking area identifier, and a paging module 702, configured to When the tracking area identifier in the paging message is the tracking area identifier of the base station, the paging terminal; when the tracking area identifier is the tracking area identifier of the relay station under the base station, indicating the relay station searching Call the terminal.
  • a receiving module 701 configured to receive a paging message, where the paging message carries a tracking area identifier
  • a paging module 702 configured to When the tracking area identifier in the paging message is the tracking area identifier of the base station, the paging terminal; when the tracking area identifier is the tracking area identifier of the relay station under the base station, indicating the relay station searching Call the terminal.
  • the base station shown in FIG. 7 may further include:
  • the forwarding module 703 is configured to forward the location update request message of the terminal, where the tracking area identifier is the tracking area identifier of the base station when the terminal resides in the cell under the control of the base station;
  • the terminal resides in a cell managed by the relay station, and the tracking area identifier in the location update request message is a tracking area identifier of the relay station.
  • the base station shown in FIG. 7 may further include:
  • a first determining module 704 configured to determine a first correspondence relationship or a second correspondence relationship;
  • the first correspondence relationship is a correspondence between a relay station under the control of the base station and a tracking area of the relay station;
  • Corresponding relationship is a correspondence between a relay station under the control of the base station, a tracking area of the relay station, and a terminal residing in a cell under the jurisdiction of the relay station;
  • the second determining module 705 is configured to determine, according to the first correspondence relationship or the second correspondence relationship, whether the tracking area identifier in the paging message is the tracking area identifier of the base station or the tracking area identifier of the relay station under the base station.
  • the receiving module 701 is further configured to: after the relay station moves to the cell managed by the base station, receive the relay station identity and the tracking area identifier reported by the relay station; and the base station shown in FIG. 7 may further include: a recording module 706 And used to record the received relay station identity and the tracking area identifier into the first correspondence or the second correspondence.
  • the base station shown in FIG. 7 may further include:
  • the updating module 707 is configured to update the second correspondence according to the relay identity, the relay tracking area identifier, and the terminal identity in the location update request message; the relay identity is added by the relay to the location update request message of.
  • the first determining module 704 is further configured to determine the first correspondence or the second correspondence by querying a mapping table or a database.
  • the embodiment of the present invention further provides a relay station, and the structure thereof is as shown in FIG. 8 , and may include: a generating module 801, configured to generate a system message, where the system message includes a tracking area identifier of the relay station;
  • the broadcast module 802 is configured to broadcast the system message, and trigger a terminal to initiate a location update request to a cell managed by the relay station.
  • the relay station shown in FIG. 8 may further include:
  • the reporting module 803 is configured to report the identity identifier and the tracking area identifier of the relay station to the base station after the relay station moves to the cell under the jurisdiction of the base station.
  • the relay station shown in FIG. 8 may further include:
  • the forwarding module 804 is configured to forward the location update request message of the terminal to the base station
  • the adding module 805 is configured to add the identity identifier of the relay station to the location update request message forwarded by the forwarding module.
  • the embodiment of the present invention further provides a communication system, including the relay station 901 shown in FIG. 8, and further includes:
  • the base station 902 is configured to receive an identity identifier and a tracking area identifier of the relay station reported by the relay station.
  • the relay station 901 is further configured to forward a location update request message of the terminal to the base station; and add the identity identifier of the relay station to the forwarded location update request message.
  • the mobility management entity in the embodiment of the present invention may include:
  • the receiving module 1001 is configured to receive a location update request message of the terminal, where the location update request message carries a tracking area identifier of the relay station where the terminal resides;
  • the updating module 1002 is configured to update the tracking area list of the terminal according to the tracking area identifier.
  • the base station receives the paging message, where the paging message carries the tracking area identifier; if the tracking area identifier in the paging message is the tracking area identifier of the base station, the base station paging the terminal; If the tracking area identifier in the paging message is the tracking area identifier of the relay station under the control of the base station, the base station instructs the relay station to page the terminal, so that the base station clears that the terminal is currently camping on its own cell.
  • the targeted paging is performed, and the signaling overhead of the system paging can be reduced compared with the technical solution of the paging terminal in the base station and the relay station under the jurisdiction in the prior art, and the system is saved. Paging resources.
  • the relay station generates a system message, where the system message includes the tracking area identifier of the relay station; the relay station broadcasts the system message, and triggers a terminal to initiate a location update request to the terminal of the cell under the jurisdiction of the relay station;
  • the tracking area identifier of the base station that receives the relay station broadcast is different, and the signaling load caused by the frequent location update of a large number of terminals caused by the movement of the relay station can be effectively reduced.
  • the paging method and the location update method of the present invention can also be used in combination, and on the one hand, the signaling load caused by frequent location update of a large number of terminals caused by the movement of the relay station can be effectively reduced; on the other hand, it can be effective.
  • the waste of paging resources in the relay network is reduced to better achieve a better balance between the signaling load of the location update and the signaling load of the paging.
  • the location update request message of the terminal that is received by the mobility management entity carries the tracking area identifier of the relay station where the terminal is located, which may facilitate the subsequent delivery of the paging message carrying the tracking area identifier of the relay station, so that the base station Defining the cell where the terminal currently resides in the relay station under its jurisdiction
  • the targeted paging is performed on the terminal, which reduces the signaling overhead of the system paging and saves the paging resources of the system, compared with the technical solutions in which the base station and the relay station in the prior art both advertise the terminal.

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Description

一种寻呼方法、 位置更新方法及装置
技术领域
本发明涉及通信技术领域, 尤其涉及一种寻呼方法、 位置更新方法及设 备。 背景技术
2006年 ITU-R ( ITU-Radiocommunication Sector, 国际电联无线电通信 部门) 正式将 B3G ( Beyond 3G, 第四代移动通信) 技术命名为 IMT- Advanced (International Mobile Telecommunications -Advanced, 国际移动通 信高级系统)技术。 一方面 IMT-Advanced对系统容量提出了很高的要求, 另一方面足以支撑这么高容量的大带宽频谱一般只能在较高频段找到, 而这 样高的频段的路损和穿透损耗都较大, 很难实现好的覆盖。 为了满足 IMT- Advanced的容量需求, 3GPP (3rd Generation Mobile Group, 第三代合作伙 伴计划)提出的 LTE-Advanced系统正将中继技术作为改善系统容量和覆盖 的候选技术之一进行研究。
在传统网络中, 基站 (eNodeB, eNB)和终端 (User Equipment, UE) 之间的无线连接是直接的无线连接, 也就是单跳的网络。 而中继技术是在基 站和终端之间增加一个或多个中继站 (Relay) , 负责将基站发送的无线信 号转发至终端。 一个基站可以为多个小区服务, 不同的小区被按照一定规则 划分到不同的 TA (Tracking Areas, 跟踪区域) 中。 终端每当移动到之前从 未到过的 TA内, 就会向网络侧发起位置更新请求, 向网络侧报告自己的最 新位置信息。 MME (Mobility Management Entity, 移动管理实体) 根据终 端报告的位置信息为每一个终端维护一个 TA列表。 每当网络侧寻呼一个终 端时, MME会根据这一终端当前的 TA列表找到与这些 TA相关联的所有 基站, 并将寻呼消息发送给这些基站。 一方面, 因为基站并不知道其下中继站所属 TA的信息, 无法得知被寻 呼终端现在是驻留在本小区, 还是驻留在其下中继站的小区里, 因此基站在 本小区开始寻呼的同时, 会将寻呼消息发送到其下所有的中继站, 以促使中 继站也开始寻呼该特定终端。
因此, 发明人在实现本发明的过程中, 发现上述现有技术存在如下不 足:
为了寻呼特定终端, 需要在基站的小区和该基站下全部中继站的小区里 进行寻呼, 这增加了系统寻呼的信令开销, 浪费了系统的寻呼资源。 相对于 基站来说, 因为中继站需要将其寻呼资源分配在终端到中继站和中继站到基 站两条无线链路上, 因此中继站相对于基站来说寻呼资源更加匮乏, 所以这 种寻呼资源的浪费问题就显得更加严重。
另一方面, 中继站第一次移动到基站的一个小区内时, 基站在该小区所 属的跟踪区域广播系统消息, 中继站将这个系统消息直接转发给所有驻留在 自己小区内的终端。 因为这些终端是在中继站内部被载入基站的小区里的, 所以通常情况下这些终端也是第一次进入基站的跟踪区域, 因此根据现有协 议, 中继站下所有终端均会进行一次位置更新过程。
因此, 发明人在实现本发明的过程中, 发现上述现有技术还存在如下不 足:
考虑到一个移动的中继站下很可能会有很多终端, 而每一个终端几乎在 同一时间都要进行一次位置更新, 在短时间内给空中接口造成巨大的信令负 担, 以致影响正常的语音及数据的通信。 移动中继站本身有可能正在高速运 动, 因此其在短时间内就会进入另外一个基站的小区覆盖范围, 而上述的大 量终端在同一时间重复进行的位置更新, 从而造成信令负荷过大。 发明内容 本发明实施例提供一种寻呼方法, 用以减少系统寻呼的信令开销, 节省 系统的寻呼资源, 该方法包括:
基站接收寻呼消息, 所述寻呼消息携带跟踪区域标识;
若所述寻呼消息中的跟踪区域标识是所述基站的跟踪区域标识, 则所述 基站寻呼终端;
若所述寻呼消息中的跟踪区域标识是所述基站所辖中继站的跟踪区域标 识, 则所述基站指示所述中继站寻呼所述终端。
本发明实施例还提供一种位置更新方法, 用以减少位置更新带来的信令 负荷, 该方法包括:
中继站生成系统消息, 所述系统消息中包括所述中继站的跟踪区域标 识;
所述中继站广播所述系统消息, 触发进入所述中继站所辖小区的终端发 起位置更新请求。
本发明实施例还提供一种寻呼方法, 用以减少系统寻呼的信令开销, 节 省系统的寻呼资源, 该方法包括:
移动管理实体接收终端的位置更新请求消息, 所述位置更新请求消息携 带所述终端所驻留的中继站的跟踪区域标识;
所述移动管理实体根据所述跟踪区域标识, 更新终端的跟踪区域列表; 所述移动管理实体下发寻呼消息, 所述寻呼消息携带所述终端的跟踪区 域列表。
本发明实施例还提供一种基站, 用以减少系统寻呼的信令开销, 节省系 统的寻呼资源, 该基站包括:
接收模块, 用于接收寻呼消息, 所述寻呼消息携带跟踪区域标识; 寻呼模块, 用于在所述寻呼消息中跟踪区域标识是所述基站的跟踪区域 标识时, 寻呼终端; 在所述寻呼消息中跟踪区域标识是所述基站所辖中继站 的跟踪区域标识时, 指示所述中继站寻呼所述终端。 本发明实施例还提供一种中继站, 用以减少位置更新带来的信令负荷, 该中继站包括:
生成模块, 用于生成系统消息, 所述系统消息中包括所述中继站的跟踪 区域标识;
广播模块, 用于广播所述系统消息, 触发进入所述中继站所辖小区的终 端发起位置更新请求。
本发明实施例还提供一种通信系统, 用以减少位置更新带来的信令负 荷, 该通信系统包括上述中继站, 还包括:
基站, 用于接收所述中继站上报的所述中继站的身份标识及跟踪区域标 识;
终端, 用于发送位置更新请求消息;
所述中继站还用于向基站转发所述终端的位置更新请求消息; 并在转发 的所述位置更新请求消息中添加入所述中继站的身份标识。
本发明实施例还提供一种移动管理实体, 用以减少系统寻呼的信令开 销, 节省系统的寻呼资源, 该移动管理实体包括:
接收模块, 用于接收终端的位置更新请求消息, 所述位置更新请求消息 携带所述终端所驻留的中继站的跟踪区域标识;
更新模块, 用于根据所述跟踪区域标识, 更新终端的跟踪区域列表。 本发明实施例中, 基站接收寻呼消息, 该寻呼消息携带跟踪区域标识; 若该寻呼消息中的跟踪区域标识是该基站的跟踪区域标识, 则该基站寻呼终 端; 若该寻呼消息中的跟踪区域标识是该基站所辖中继站的跟踪区域标识, 则该基站指示该中继站寻呼该终端, 通过使基站明确终端当前是驻留在自己 的小区里, 还是驻留在所辖中继站的小区里, 对终端进行有针对性的寻呼, 与现有技术中基站与所辖中继站均寻呼终端的技术方案相比, 从而减少系统 寻呼的信令开销, 节省系统的寻呼资源。 本发明实施例中, 中继站生成系统消息, 该系统消息中包括该中继站的 跟踪区域标识; 该中继站广播该系统消息, 触发进入该中继站所辖小区的终 端发起位置更新请求; 与现有技术中终端进入所辖小区时接收中继站广播的 基站的跟踪区域标识不同, 可以有效的减少由于中继站的移动带来的大量终 端频繁的同时进行位置更新而带来的信令负荷。
本发明实施例中, 移动管理实体接收的终端的位置更新请求消息中携带 该终端所驻留的中继站的跟踪区域标识, 可以方便后续下发的寻呼消息中携 带中继站的跟踪区域标识, 使基站明确终端当前驻留在所辖中继站的小区 里, 对终端进行有针对性的寻呼, 与现有技术中基站与所辖中继站均寻呼终 端的技术方案相比, 从而减少系统寻呼的信令开销, 节省系统的寻呼资源。 附图说明
此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 并不构成对本发明的限定。 在附图中:
图 1为本发明实施例中所涉及网络场景的示意图;
图 2为本发明实施例中寻呼方法流程图;
图 3为本发明实施例中位置更新方法流程图;
图 4、 图 5、 图 6为本发明实施例中寻呼方法的具体实例流程图; 图 7为本发明实施例中基站的结构示意图;
图 8为本发明实施例中中继站的结构示意图;
图 9为本发明实施例中通信系统的结构示意图;
图 10为本发明实施例中移动管理实体的结构示意图。 具体实施方式 为使本发明实施例的目的、 技术方案和优点更加清楚明白, 下面结合附 图对本发明实施例做进一步详细说明。 在此, 本发明的示意性实施例及其说 明用于解释本发明, 但并不作为对本发明的限定。
图 1为本发明实施例所涉及网络场景的示意图。 如图 1所示, MME是 网络中负责对终端发起寻呼的控制网元, MME和 eNB之间的已有控制接口 为 S1-MME。 为满足对 LTE (Long Term Evolution, 长期演进) 终端的后向 兼容性, 中继站和终端之间可以重用原 LTE网络中基站与终端之间的接 口, 即 Uu接口。 中继站本身可以是静止的也可以是移动的, 移动的中继站 被安装火车和公交车等交通工具上, 为其中的乘客提供稳定的无线网络接入 服务。 在图 1中, 1^1&^&和 Relay_b是两个固定的中继站, Relay— c是一个 移动的中继站。 eNB是一个基站, 上述三个中继站通过 eNB的中转最终接 入核心网络。
如图 2所示, 本发明实施例中寻呼方法流程可以包括:
步骤 201、 基站接收寻呼消息, 所述寻呼消息携带跟踪区域标识。
歩骤 202a、 若所述寻呼消息中跟踪区域标识是所述基站的跟踪区域标 识, 则所述基站寻呼终端。
歩骤 202b、 若所述寻呼消息中跟踪区域标识是所述基站所辖中继站的 跟踪区域标识, 所述基站指示所述中继站寻呼所述终端。
由图 2所示流程可以得知, 基站通过明确终端当前是驻留在自己的小区 里, 还是所辖中继站的小区里, 可以进行有针对性的寻呼, 与现有技术中基 站与所辖中继站均寻呼终端的技术方案相比, 明显优化了中继网络的寻呼过 程, 减少了系统寻呼的信令开销, 节省了系统的寻呼资源。
由于网络侧寻呼某一终端时, MME会根据这一终端当前的 TA列表找 到与这些 TA相关联的所有基站, 并将寻呼消息发送给这些基站, 而终端的 TA列表是 MME根据终端报告的位置信息进行维护的, 因此, 在一个实施 例中, 所述基站接收到所述寻呼消息之前, 还可以包括: 所述基站转发所述终端的位置更新请求消息, 当所述终端驻留在所述基 站所辖小区, 所述位置更新请求消息中跟踪区域标识是所述基站的跟踪区域 标识; 当所述终端驻留在所述中继站所辖小区, 所述位置更新请求消息中跟 踪区域标识是所述中继站的跟踪区域标识。
在基站将终端的位置更新请求消息转发给 MME后, MME就可以根据 该位置更新请求消息中携带的跟踪区域标识, 更新终端的跟踪区域列表。 在 MME下发寻呼消息时, 寻呼消息中可以携带终端的身份标识和终端的跟踪 区域列表。
前面提到, 若终端驻留在中继站所辖小区, 则终端的位置更新请求消息 中会携带中继站的跟踪区域标识。 而由于位置更新请求消息是由终端生成并 发出, 再经中继站、 基站转发至 MME, 因此, 实现在位置更新请求消息中 携带中继站的跟踪区域标识的方式可以有多种, 例如: 所述中继站的跟踪区 域标识是由所述终端从所述中继站获得, 并添加入所述位置更新请求消息 的; 又如, 所述中继站的跟踪区域标识是由所述中继站添加入所述位置更新 请求消息的; 再如, 所述中继站的跟踪区域标识是由所述基站从所述中继站 获得, 并添加入所述位置更新请求消息的。
一个实施例中, 终端从中继站获得中继站的跟踪区域标识, 可以是: 终 端在进入中继站所辖小区时, 接收中继站广播的中继站跟踪区域标识。 可以 看到, 现有技术中, 终端在进入中继站所辖小区时, 中继站广播的是基站的 跟踪区域标识, 而本实施例中, 终端在进入中继站所辖小区时, 中继站广播 的是中继站的跟踪区域标识。 现有技术中, 由于中继站的移动, 则中继站广 播的基站的跟踪区域标识处于不断变化中, 终端将不断的发起位置更新请 求; 而本实施例中, 即使中继站在移动, 中继站广播的中继站跟踪标识也是 相对不变的, 终端发起位置更新请求的频率大大降低, 有效地减少了位置更 新带来的信令负荷。 则如图 3所示, 本发明还可以提供一种位置更新方法, 其流程可以包 括:
步骤 301、 中继站生成系统消息, 所述系统消息中包括所述中继站的跟 踪区域标识。
歩骤 302、 所述中继站广播所述系统消息, 触发进入所述中继站所辖小 区的终端发起位置更新请求。
图 3所示流程与现有技术中终端进入所辖小区时接收中继站广播的基站 的跟踪区域标识不同, 可以有效的减少由于中继站的移动带来的大量终端频 繁的同时进行位置更新而带来的信令负荷。
图 3所示的位置更新方法可以单独使用, 也可以与图 2所示的寻呼方法 结合使用, 在结合使用时, 一方面优化了中继网络的寻呼过程, 减少了中继 网络中寻呼资源的浪费; 另一方面也防止了移动中继站的加入所引起的位置 更新信令负荷过重的问题。
为了方便基站确定寻呼消息中跟踪区域标识是本基站的跟踪区域标识、 还是本基站所辖中继站的跟踪区域标识, 在一个实施例中, 基站可以确定第 一对应关系, 并根据第一对应关系, 确定所述寻呼消息中跟踪区域标识是本 基站的跟踪区域标识、 还是本基站所辖中继站的跟踪区域标识; 其中, 第一 对应关系为本基站所辖中继站、 该中继站的跟踪区域之间的对应关系。
第一对应关系可以由基站进行存储以方便其确定, 当然也可以由其它设 备进行存储, 基站通过与该设备进行交互以实现该确定功能。 若是由基站进 行存储, 则基站需获得中继站、 中继站的跟踪区域的相关信息, 在一个实施 例中, 基站可以在中继站移动至本基站所辖小区后, 接收该中继站上报的中 继站身份标识及跟踪区域标识; 然后将接收的中继站身份标识及跟踪区域标 识, 记入第一对应关系。
第一对应关系可以记录于一映射表、 或数据库中, 以便于查询。 下面举一例说明上述实施例中结合了位置更新方法的寻呼方法具体实 施。 图 4为本例中寻呼方法的流程图; 本例中, 中继站 Relay_c为一个移动 的中继站, 终端 UE— i为这个移动中继站下的终端, 为完成对终端 UE— i的 寻呼, 整个流程可以分为三个阶段, 包括:
阶段一
步骤 401、 Relay_c移动进入 eNB的小区内。
步骤 402、 Relay_c向 eNB发送一个控制消息 Control— Message— 1。 在 Control— Message— 1中, Relay_c向 eNB报告了其中继站身份标识 Relay— ID 和跟踪区域标识 TA— c。
步骤 403a-b、 eNB 内部存储了一个跟踪区域和中继站对应关系的映射 表: (TA— Relay) 映射表, 该映射表存储第一对应关系。 eNB在接收到 Control— Message_l后, 先会根据其中的信息来更新(TA— Relay) 映射表, 然后 eNB 会向 MME 发送一条 S1-MME接口上的控制消息, 例如 ENB— CONFIGURATION—UPDATE, 这条控制消息内包含 eNB的身份标识 eNB ID和 Relay_c的跟踪区域标识 TA— c。 在 MME接收到这个控制消息后 便可得知现在 Relay— c驻留在这个 eNB的小区内。
阶段二
歩骤 404、 某一特定终端 UE— i进入 Relay— c的小区。
步骤 405、 Relay_c在自己的小区里通过系统消息广播自己的身份标识 Relay— ID和跟踪区域标识 TA— c。
步骤 406、 UE_i在接收到后 Relay— c广播的系统消息后便会向 Relay_c 发送控制消息 Tracking— Area— Update— Request (位置更新请求消息) 以发起 位置更新过程。 Tracking_Area_Update_Request在现有标准中有定义, 其中 包含终端的身份标识 UE— ID和跟踪区域标识 TA— c。
歩骤 407、 Relay— c在接到这个消息后并不做处理, 而是直接转发给 歩骤 408、 eNB在接到这个消息后并不做处理, 而是直接将其转发直至 MME0
步骤 409、 MME为每一个 UE维护了一个跟踪区域的列表。 MME在收 到 UE— i发送的 Tracking— AreaJJpdate— Request后会将 TA_c添加进 UE_i的 跟踪区域列表 TA_List_of— UE_i。 这里, 图 3 中所有网络侧对 Tracking Area Update Request 的 响 应 消 息
Tracking_Area_Update_Response, 在图中都已被省略。
阶段三
步骤 410、 MME接收到核心网对 UE_i的寻呼请求。
步骤 411、 MME向 eNB发送寻呼消息 Paging。 Paging消息中包含 UE— i 的身份标识 UE_ID和 UE— i的跟踪区域列表 TA— List— of_UE— i。
歩骤 412、 eNB在收到这个 Paging消息后, 会根据 TA_List_of_UE_i中 列出的跟踪区域标识去查询 (TA—Relay) 映射表。
步骤 413、 因为 TA_List_of_UE— i中有很大可能只包括 TA— c, 而并不 包括 eNB及 eNB下面的其它中继站的跟踪区域标识, 所以 eNB可以只把这 个 Paging消息发送给 Relay_c以使其开始对 UE_i的寻呼, 而不用在自己的 小区里寻呼 UE_i, 也不用让自己下面的其它中继站来寻呼 UE_i。
歩骤 414、 Relay c对 UE_i进行寻呼。
前面提到, 第一对应关系为本基站所辖中继站、 该中继站的跟踪区域之 间的对应关系, 在另一个实施例中, 基站也可以确定第二对应关系, 并根据 第二对应关系, 确定所述寻呼消息中跟踪区域标识是本基站的跟踪区域标 识、 还是本基站所辖中继站的跟踪区域标识; 其中, 第二对应关系为本基站 所辖中继站、 该中继站的跟踪区域、 驻留在该中继站所辖小区的终端之间的 对应关系。
当然, 与第一对应关系类似, 第二对应关系也可以由基站进行存储以方 便其确定, 当然也可以其它设备进行存储, 基站通过与该设备进行交互以实 现该确定功能。 若是由基站进行存储, 则基站需获得中继站、 中继站的跟踪 区域、 驻留在该中继站所辖小区的终端的相关信息, 在一个实施例中, 基站 可以在中继站移动至本基站所辖小区后, 接收该中继站上报的中继站身份标 识及跟踪区域标识; 然后将接收的中继站身份标识及跟踪区域标识, 记入第 二对应关系。
第二对应关系也可由基站根据位置更新请求消息中的中继站身份标识、 中继站跟踪区域标识、 终端身份标识进行更新。 实施中, 中继站身份标识可 以由所述中继站添加入所述位置更新请求消息。
当然, 第二对应关系也可以记录于一映射表、 或数据库中, 以便于査 询。
下面举一例说明上述实施例中结合了位置更新方法的寻呼方法具体实 施。 图 5为本例中寻呼方法的流程图; 本例中, Relay_a是一个固定中继 站, UE— k是一个驻留在 Relay_a下的终端。 整个过程仍然可以分为三个不 同阶段。 下面主要描述图 5所示流程与图 4所示流程的不同之处。
在阶段一中, 步骤 501至步骤 502中, Relay_a会自动向 eNB发送一个 控制消息 Control—Message— 1, 这条控制消息的定义和功能和图 4 中的 Control Message l相同。 和图 4不同的是, 步骤 503a中, eNB现在内部维 护的是一个跟踪区域, 中继站和终端的映射表 (TA— Relay— UE) , 该映射 表存储第二对应关系。 在接收到 Control_Message— 1后, eNB会将 Relay_a 及其它的跟踪区域 TA_a之间的映射关系加入这个映射表。 接下来阶段一的 消息 (步骤 503b)和过程与图 4相同。
在阶段二中, 步骤 504中, UE_k移动到 Relay— a的小区内, 和图 4类 似, 在步骤 505, Relay_a在自己的小区内广播自己的身份标识和跟踪区域 标识, 在步骤 506, !^—!^在接收到 1^1& _ 的广播消息后, 会向 Relay— a发 送控制消息 Tracking_Area_Update_Request。 与图 4不同的是, 在步骤 507, Relay_a会对这个消息进行处理以生成控制消息 Control— Message_2。 Control— Message_2相对于 Tracking_Area_Update_Request多了一个参数, 即 Relay— a 的身份标识 Relay— ID。 在步骤 508-509, Relay a 发送 Control— Message_2, eNB在收到 Control_Message_2后, 会根据消息中包含 的信息对 (TA— Relay— UE) 映射表进行更新, 由此 eNB知道了 UE_k现 在驻留在 Relay_a的小区里。
在阶段三中, 与图 4类似的是, 步骤 512中, eNB在接到 Paging消息 后会去查询 (TA— Relay— UE ) 映射表, 以此断定 UE— k现在驻留在 Relay— a的小区里, 因此在步骤 513 中, eNB直接将 Paging消息发送给 Relay— a, 随后执行步骤 514, Relay_a在自己的小区里开始了对 UE_k的寻 呼。
一个实施例中, 为了减少对中继站的改动, 终端的位置更新请求消息可 以是接入域消息。 下面举一例说明。 如图 6所示的寻呼流程, 与图 5相比, 不同只在阶段二, 因此图 6中略去了阶段一和阶段三。
在图 6中, 步骤 601 中, UE_k移动到 Relay— a的小区内; 步骤 602 中, UE— k接收 Relay_a的系统消息; 而在步骤 603 中, UE— k并没有向 Relay— a发送消息 Tracking_Area_Update_Request, 而是发送了一条新定义的 消息 Control_Message_3。 因为 Tracking_Area_Update_Request是一条非接入 域消息, 因此在图 5中要使得 Relay— a可以处理这条消息, 需要对 Relay_a 进行较大改动。 而图 6中新设计的消息 Control_Message— 3是一条接入域消 息, 因此 Relay_a 无需做太大改动就可以处理这条消息。 和 Tracking Area Update Request相似, Control— Message— 3中包含 UE k的身 份标识 UE_ID和其跟踪区域标识 TA_a。 后续步骤 604-606与图 5类似。
本发明实施例还可扩展应用于多跳的中继网络中, 即场景图 1中中继站 的下面还可以再连接中继站。 在这种情况下, 以上的各技术关键点和欲保护 点仍然适用, 只是描述中的基站本身也是一个中继站。 本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤 是可以通过程序来指令相关的硬件完成, 所述的程序可以存储于一计算机可 读取存储介质中, 该程序在执行时, 可以包括上述实施例方法中的全部或部 分步骤, 所述的存储介质可以包括: ROM、 RAM, 磁盘、 光盘等。
本发明实施例中还提供了基站、 中继站、 通信系统, 如下面的实施例所 述。 由于这些设备解决问题的原理与寻呼方法或位置更新方法相似, 因此这 些设备的实施可以参见方法的实施, 重复之处不再赘述。
本发明实施例提供一种基站, 其结构如图 7所示, 可以包括: 接收模块 701, 用于接收寻呼消息, 所述寻呼消息携带跟踪区域标识; 寻呼模块 702, 用于在所述寻呼消息中跟踪区域标识是所述基站的跟踪 区域标识时, 寻呼终端; 在所述寻呼消息中跟踪区域标识是所述基站所辖中 继站的跟踪区域标识时, 指示所述中继站寻呼所述终端。
一个实施例中, 图 7所示的基站还可以包括:
转发模块 703, 用于转发所述终端的位置更新请求消息, 当所述终端驻 留在所述基站所辖小区, 所述位置更新请求消息中跟踪区域标识是所述基站 的跟踪区域标识; 当所述终端驻留在所述中继站所辖小区, 所述位置更新请 求消息中跟踪区域标识是所述中继站的跟踪区域标识。
一个实施例中, 图 7所示的基站还可以包括:
第一确定模块 704, 用于确定第一对应关系或第二对应关系; 所述的第 一对应关系为所述基站所辖中继站、 该中继站的跟踪区域之间的对应关系; 所述的第二对应关系为所述基站所辖中继站、 该中继站的跟踪区域、 驻留在 该中继站所辖小区的终端之间的对应关系;
第二确定模块 705, 用于根据第一对应关系或第二对应关系, 确定所述 寻呼消息中跟踪区域标识是所述基站的跟踪区域标识、 还是所述基站所辖中 继站的跟踪区域标识。 一个实施例中, 接收模块 701进一步用于在中继站移动至所述基站所辖 小区后, 接收该中继站上报的中继站身份标识及跟踪区域标识; 则图 7所示 的基站还可以包括: 记录模块 706, 用于将接收的中继站身份标识及跟踪区 域标识, 记入第一对应关系或第二对应关系。
一个实施例中, 图 7所示的基站还可以包括:
更新模块 707, 用于根据位置更新请求消息中的中继站身份标识、 中继 站跟踪区域标识、 终端身份标识, 更新第二对应关系; 所述中继站身份标识 是由所述中继站添加入所述位置更新请求消息的。
一个实施例中, 第一确定模块 704还可以用于通过查询映射表或数据 库, 确定第一对应关系或第二对应关系。
本发明实施例还提供一种中继站, 其结构如图 8所示, 可以包括: 生成模块 801, 用于生成系统消息, 所述系统消息中包括所述中继站的 跟踪区域标识;
广播模块 802, 用于广播所述系统消息, 触发进入所述中继站所辖小区 的终端发起位置更新请求。
一个实施例中, 图 8所示的中继站还可以包括:
上报模块 803, 用于在所述中继站移动至基站所辖小区后, 向所述基站 上报所述中继站的身份标识及跟踪区域标识。
一个实施例中, 图 8所示的中继站还可以包括:
转发模块 804, 用于向基站转发所述终端的位置更新请求消息; 添加模块 805, 用于在所述转发模块转发的所述位置更新请求消息中添 加入所述中继站的身份标识。
如图 9所示, 本发明实施例还提供一种通信系统, 包括图 8所示的中继 站 901, 还包括:
基站 902, 用于接收所述中继站上报的所述中继站的身份标识及跟踪区 域标识; 所述中继站 901还用于向基站转发终端的位置更新请求消息; 并在转发 的所述位置更新请求消息中添加入所述中继站的身份标识。
如图 10所示, 本发明实施例中移动管理实体可以包括:
接收模块 1001, 用于接收终端的位置更新请求消息, 所述位置更新请 求消息携带所述终端所驻留的中继站的跟踪区域标识;
更新模块 1002, 用于根据所述跟踪区域标识, 更新终端的跟踪区域列 表。
本发明实施例中, 基站接收寻呼消息, 所述寻呼消息携带跟踪区域标 识; 若所述寻呼消息中的跟踪区域标识是所述基站的跟踪区域标识, 则所述 基站寻呼终端; 若所述寻呼消息中的跟踪区域标识是所述基站所辖中继站的 跟踪区域标识, 则所述基站指示所述中继站寻呼所述终端, 从而使基站明确 终端当前是驻留在自己的小区里, 还是所辖中继站的小区里, 进行有针对性 的寻呼, 与现有技术中基站与所辖中继站均寻呼终端的技术方案相比, 可以 减少系统寻呼的信令开销, 节省系统的寻呼资源。
本发明实施例中, 中继站生成系统消息, 所述系统消息中包括所述中继 站的跟踪区域标识; 所述中继站广播所述系统消息, 触发进入所述中继站所 辖小区的终端发起位置更新请求; 与现有技术中终端进入所辖小区时接收中 继站广播的基站的跟踪区域标识不同, 可以有效的减少由于中继站的移动带 来的大量终端频繁的同时进行位置更新而带来的信令负荷。
本发明的寻呼方法和位置更新方法也可以结合使用, 一方面可以有效的 减少因为中继站的移动带来的大量终端频繁的同时进行位置更新而带来的信 令负荷; 另一方面可以有效的减少中继网络中寻呼资源的浪费, 以更好的达 到位置更新的信令负荷和寻呼的信令负荷之间较好的平衡。
本发明实施例中, 移动管理实体接收的终端的位置更新请求消息中携带 该终端所驻留的中继站的跟踪区域标识, 可以方便后续下发的寻呼消息中携 带中继站的跟踪区域标识, 使基站明确终端当前驻留在所辖中继站的小区 里, 对终端进行有针对性的寻呼, 与现有技术中基站与所辖中继站均寻呼终 端的技术方案相比, 从而减少系统寻呼的信令开销, 节省系统的寻呼资源。
以上所述的具体实施例, 对本发明的目的、 技术方案和有益效果进行了 进一步详细说明, 所应理解的是, 以上所述仅为本发明的具体实施例而已, 并不用于限定本发明的保护范围, 凡在本发明的精神和原则之内, 所做的任 何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种寻呼方法, 其特征在于, 该方法包括:
基站接收寻呼消息, 所述寻呼消息携带跟踪区域标识;
若所述寻呼消息中的跟踪区域标识是所述基站的跟踪区域标识, 则所述 基站寻呼终端;
若所述寻呼消息中的跟踪区域标识是所述基站所辖中继站的跟踪区域标 识, 则所述基站指示所述中继站寻呼所述终端。
2、 如权利要求 1所述的方法, 其特征在于, 所述基站接收到所述寻呼 消息之前, 还包括:
所述基站转发所述终端的位置更新请求消息;
当所述终端驻留在所述基站所辖小区, 所述位置更新请求消息中跟踪区 域标识是所述基站的跟踪区域标识;
当所述终端驻留在所述中继站所辖小区, 所述位置更新请求消息中跟踪 区域标识是所述中继站的跟踪区域标识。
3、 如权利要求 2所述的方法, 其特征在于, 所述位置更新请求消息包 括接入域消息。
4、 如权利要求 2所述的方法, 其特征在于, 当所述终端驻留在所述中 继站所辖小区, 所述中继站的跟踪区域标识是:
由所述终端从所述中继站获得, 并添加入所述位置更新请求消息的; 或, 由所述中继站添加入所述位置更新请求消息的;
或, 由所述基站从所述中继站获得, 并添加入所述位置更新请求消息 的。
5、 如权利要求 4所述的方法, 其特征在于, 所述中继站的跟踪区域标 识由所述终端从所述中继站获得, 包括:
所述终端在进入所述中继站所辖小区时, 接收所述中继站广播的所述中 继站的跟踪区域标识。
6、 如权利要求 1所述的方法, 其特征在于, 还包括:
所述基站确定第一对应关系或第二对应关系;
所述的第一对应关系为所述基站所辖中继站、 该中继站的跟踪区域之间 的对应关系;
所述的第二对应关系为所述基站所辖中继站、 该中继站的跟踪区域、 驻 留在该中继站所辖小区的终端之间的对应关系;
所述基站根据第一对应关系或第二对应关系, 确定所述寻呼消息中的跟 踪区域标识是所述基站的跟踪区域标识, 还是所述基站所辖中继站的跟踪区 域标识。
7、 如权利要求 6所述的方法, 其特征在于, 所述基站转发所述终端的 位置更新请求消息之前, 还包括:
所述基站在中继站移动至所述基站所辖小区后, 接收该中继站上报的中 继站身份标识及跟踪区域标识;
所述基站将接收的中继站身份标识及跟踪区域标识, 记入第一对应关系 或第二对应关系。
8、 如权利要求 7所述的方法, 其特征在于, 所述基站转发所述终端的 位置更新请求消息之前, 还包括:
所述基站根据位置更新请求消息中的中继站身份标识、 中继站跟踪区域 标识、 终端身份标识, 更新第二对应关系; 所述中继站身份标识是由所述中 继站添加入所述位置更新请求消息的。
9、 如权利要求 6所述的方法, 其特征在于, 所述基站确定第一对应关 系或第二对应关系, 包括:
所述基站通过查询映射表或数据库, 确定第一对应关系或第二对应关 系。
10、 一种位置更新方法, 其特征在于, 该方法包括: 中继站生成系统消息, 所述系统消息中包括所述中继站的跟踪区域标 识;
所述中继站广播所述系统消息, 触发进入所述中继站所辖小区的终端发 起位置更新请求。
11、 如权利要求 10所述的方法, 其特征在于, 所述中继站生成系统消 息之前, 还包括:
所述中继站在移动至基站所辖小区后, 向所述基站上报所述中继站的身 份标识及跟踪区域标识。
12、 如权利要求 10所述的方法, 其特征在于, 所述中继站广播所述系 统消息之后, 还包括:
所述中继站向基站转发所述终端的位置更新请求消息; 并在转发的所述 位置更新请求消息中添加入所述中继站的身份标识。
13、 一种寻呼方法, 其特征在于, 该方法包括:
移动管理实体接收终端的位置更新请求消息, 所述位置更新请求消息携 带所述终端所驻留的中继站的跟踪区域标识;
所述移动管理实体根据所述跟踪区域标识, 更新终端的跟踪区域列表; 所述移动管理实体下发寻呼消息, 所述寻呼消息携带所述终端的跟踪区 域列表。
14、 一种基站, 其特征在于, 包括:
接收模块, 用于接收寻呼消息, 所述寻呼消息携带跟踪区域标识; 寻呼模块, 用于在所述寻呼消息中跟踪区域标识是所述基站的跟踪区域 标识时, 寻呼终端; 在所述寻呼消息中跟踪区域标识是所述基站所辖中继站 的跟踪区域标识时, 指示所述中继站寻呼所述终端。
15、 如权利要求 14所述的基站, 其特征在于, 还包括:
转发模块, 用于转发所述终端的位置更新请求消息, 当所述终端驻留在 所述基站所辖小区, 所述位置更新请求消息中跟踪区域标识是所述基站的跟 踪区域标识; 当所述终端驻留在所述中继站所辖小区, 所述位置更新请求消 息中跟踪区域标识是所述中继站的跟踪区域标识。
16、 如权利要求 14所述的基站, 其特征在于, 还包括:
第一确定模块, 用于确定第一对应关系或第二对应关系; 所述的第一对 应关系为所述基站所辖中继站、 该中继站的跟踪区域之间的对应关系; 所述 的第二对应关系为所述基站所辖中继站、 该中继站的跟踪区域、 驻留在该中 继站所辖小区的终端之间的对应关系;
第二确定模块, 用于根据第一对应关系或第二对应关系, 确定所述寻呼 消息中的跟踪区域标识是所述基站的跟踪区域标识, 还是所述基站所辖中继 站的跟踪区域标识。
17、 如权利要求 16所述的基站, 其特征在于, 所述接收模块进一步用 于在中继站移动至所述基站所辖小区后, 接收该中继站上报的中继站身份标 识及跟踪区域标识;
所述基站还包括:
记录模块, 用于将接收的中继站身份标识及跟踪区域标识, 记入第一对 应关系或第二对应关系。
18、 如权利要求 17所述的基站, 其特征在于, 还包括:
更新模块, 用于根据位置更新请求消息中的中继站身份标识、 中继站跟 踪区域标识、 终端身份标识, 更新第二对应关系; 所述中继站身份标识是由 所述中继站添加入所述位置更新请求消息的。
19、 如权利要求 16所述的基站, 其特征在于, 所述第一确定模块进一 步用于通过查询映射表或数据库, 确定第一对应关系或第二对应关系。
20、 一种中继站, 其特征在于, 包括:
生成模块, 用于生成系统消息, 所述系统消息中包括所述中继站的跟踪 区域标识; 广播模块, 用于广播所述系统消息, 触发进入所述中继站所辖小区的终 端发起位置更新请求。
21、 如权利要求 20所述的中继站, 其特征在于, 还包括:
上报模块, 用于在所述中继站移动至基站所辖小区后, 向所述基站上报 所述中继站的身份标识及跟踪区域标识。
22、 如权利要求 20所述的中继站, 其特征在于, 还包括:
转发模块, 用于向基站转发所述终端的位置更新请求消息;
添加模块, 用于在所述转发模块转发的所述位置更新请求消息中添加入 所述中继站的身份标识。
23、 一种通信系统, 其特征在于, 包括权利要求 20所述的中继站, 还 包括:
基站, 用于接收所述中继站上报的所述中继站的身份标识及跟踪区域标 识;
所述中继站还用于向基站转发终端的位置更新请求消息; 并在转发的所 述位置更新请求消息中添加入所述中继站的身份标识。
24、 一种移动管理实体, 其特征在于, 包括:
接收模块, 用于接收终端的位置更新请求消息, 所述位置更新请求消息 携带所述终端所驻留的中继站的跟踪区域标识;
更新模块, 用于根据所述跟踪区域标识, 更新终端的跟踪区域列表。
PCT/CN2009/071541 2009-04-28 2009-04-28 一种寻呼方法、位置更新方法及装置 Ceased WO2010124458A1 (zh)

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