WO2010000092A1 - Procédé et dispositif de commande du transfert intercellulaire d’un terminal d’un réseau de communication sans fil - Google Patents

Procédé et dispositif de commande du transfert intercellulaire d’un terminal d’un réseau de communication sans fil Download PDF

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Publication number
WO2010000092A1
WO2010000092A1 PCT/CN2008/001254 CN2008001254W WO2010000092A1 WO 2010000092 A1 WO2010000092 A1 WO 2010000092A1 CN 2008001254 W CN2008001254 W CN 2008001254W WO 2010000092 A1 WO2010000092 A1 WO 2010000092A1
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WIPO (PCT)
Prior art keywords
handover
mobile terminal
information
access node
priority
Prior art date
Application number
PCT/CN2008/001254
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English (en)
Chinese (zh)
Inventor
张文涛
邹加林
张静
Original Assignee
朗讯科技公司
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
Application filed by 朗讯科技公司 filed Critical 朗讯科技公司
Priority to CN2008801296994A priority Critical patent/CN102057737A/zh
Priority to PCT/CN2008/001254 priority patent/WO2010000092A1/fr
Publication of WO2010000092A1 publication Critical patent/WO2010000092A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters

Definitions

  • Terminal switching control method and device in wireless communication network are Terminal switching control method and device in wireless communication network
  • the present invention relates to a wireless communication network, and more particularly to a control method and apparatus for switching a mobile terminal between different access nodes in a wireless communication network.
  • Ultra Mobile Broadband LTE
  • WiMAX Worldwide Interoperability for Microwave Access
  • the mobile terminal 20 is performing a VoIP service.
  • the mobile terminal 20 In such as UMB, In the WiMA and other standards, the mobile terminal 20 periodically detects the signal strength of pilot signals (pilots) from each access node, and based on the detection result, to the access node to which it currently belongs (also referred to herein as mobile).
  • the terminal's service AN) reports the test results.
  • the mobile terminal 20 is located at the central location of the cell under the access node 10 (the serving AN), because the pilot signal strength from the access node 10 is much greater than that from other access nodes. Pilot signal strength.
  • the mobile terminal 20 typically only needs to report the signal strength from the access node 10.
  • the mobile terminal 20 moves to the cell edge as shown in FIG. Since the detected signal strength from the access node 10 and the access node 11 adjacent thereto is equivalent, even if the former is weaker than the latter, the mobile terminal 20 reports the two from the detection result report.
  • the signal report also contains an identification information to indicate that it is desired to switch from access via access node 10 to access via access node 1.
  • a handover request message such a message for requesting handover between access points
  • a source node before handover a mobile terminal that is ready to perform handover
  • a handover target Called the target node.
  • the source node e.g., access node 10 forwards the handover request message to the destination node (access node 11,). Since the access node 11 is likely to receive more than one handover request message, the handover request messages are respectively from multiple access nodes adjacent thereto, and thus, based on the handover mechanism commonly used in the field, these handover request messages are The access node 11 will respond in the order of first in first out.
  • the handover request message sent by the mobile terminal that is performing the high latency sensitivity service and the handover request message sent by the mobile terminal that is performing the low latency sensitivity service are treated equally, if the access node 11
  • the remaining transmission resources on the air interface are relatively scarce, and before the handover request of the mobile terminal 20, there are already a plurality of other mobile terminals that are performing FTP download or web browsing, and send a handover request message and wait in the queue.
  • the access node 11 preferentially allocates resources for these other mobile terminals to complete the handover, and when it is the turn of the mobile terminal 20, the remaining resources of the access node 11 are insufficient, and thus, the handover of the mobile terminal 20
  • the request may be rejected, and this may directly result in the interruption of its voice call or video conference.
  • the handover request message sent by the mobile terminal (AT, called the access terminal) in the UMB system includes the following information: maximum waiting time, amount of data that the mobile terminal has already cached. Therefore, the target node can perform preliminary priority adjustment according to information such as the maximum waiting time, the amount of buffered data, and the like included in each handover request message. For example, the mobile terminal that has the shortest waiting time is preferentially allocated resources to complete the handover, or the mobile terminal that has already buffered more data is preferentially allocated to complete the handover, and the like.
  • This existing switching mechanism has the following problems:
  • the mobile terminal provides the maximum waiting time and the amount of data that the mobile terminal has buffered for the target node, the above information only indicates the information of the radio bearer level. It is considered that mobile terminals that need to be handed over in the system may be carrying out service transmission, and different mobile terminals may be transmitting different services. More specifically, a mobile terminal to be handed over may be transmitting a plurality of different types of data services, and the priority of various data services is large. At this point, the maximum wait time, the amount of data buffered, and the information that is completely unrelated to the type of service are not sufficient to help the target node to optimally prioritize each switch request.
  • an object of the present invention is to provide a new method and apparatus. Specifically, after obtaining a handover request message related to a mobile terminal, the target node according to the mobile terminal included therein Priority type related information related to the type of service and/or user characteristic information to determine how to handle the handover request, for example, in the AN In the case of a tight transmission channel resource on the air interface, the AN may reject some low priority handover requests, or defer these low priority handover requests, and use only resources to achieve high priority. User switching.
  • a method for controlling a handover of a mobile terminal from another access node to a local access node in an access node of a wireless communication network includes the following steps Receiving a handover request message related to one or more mobile terminals, the handover request message being used to request that the one or more mobile terminals be handed over from the corresponding other access node to the local access node; b And obtaining, according to the handover request message, handover priority related information associated with the service type and/or user feature information of each mobile terminal; c. processing the respective according to the obtained handover priority related information Switch the request.
  • a method for controlling a handover of a mobile terminal from a local access node to another access node in an access node of a wireless communication network comprising the steps of: B. And providing, to the another access node, handover control assistance information corresponding to the mobile terminal, where the handover control assistance information is related to user feature information and/or service type of the mobile terminal.
  • a method for assisting handover control of an mobile terminal from one access node to another in a mobile terminal of a wireless communication network comprises The following steps are: 0.
  • a severance control apparatus for controlling a mobile terminal to be handed over by another access node to a local access node in an access node of a wireless communication network
  • the method includes the following steps: a first receiving device, configured to receive a handover request message related to one or more mobile terminals, where the handover request message is used to request to send the one or more mobile terminals from the corresponding other access node to the local access node Performing a handover; obtaining, for obtaining, according to the handover request message, handover priority related information associated with the service type and/or user feature information of each mobile terminal; processing means, configured to obtain according to the obtained The priority information is switched to process the respective handover requests.
  • a cut-out control apparatus for controlling a mobile terminal to switch from a local access node to another access node in an access node of a wireless communication network, including: And a providing apparatus, configured to provide, for the another access node, handover control assistance information corresponding to the mobile terminal, where the handover control assistance information is related to user feature information and/or service type of the mobile terminal.
  • an auxiliary device for assisting handover control of a mobile terminal from one access node to another in a mobile terminal of a wireless communication network, characterized in that The method includes: a third providing apparatus, configured to provide the access node with handover control assistance information corresponding to the mobile terminal, where the handover control assistance information is related to user feature information and/or service type of the mobile terminal.
  • the target node can obtain the handover priority information determined by the service type that the mobile terminal requesting handover is determined and/or the handover priority information determined by the user characteristic information of the mobile terminal, and According to the information, scheduling is performed between a plurality of mobile terminals that request handover, and the requirements of the high priority users are preferentially satisfied. Therefore, it is possible to effectively avoid high-latency-sensitive services that are interrupted due to excessive waiting time during handover, and can also take care of the switching requirements of important users.
  • Figure la shows a schematic diagram of a wireless communication network comprising two neighboring cells
  • Figure lb shows a schematic diagram of a wireless communication network comprising two neighboring cells
  • Figure 2 shows a specific implementation in accordance with the present invention Schematic diagram of a wireless communication network
  • FIG. 3 is a flow chart showing a system method for performing handover control triggered by a mobile terminal in an HRPD system in accordance with an embodiment of the present invention
  • 4 illustrates a flow chart of a system method for performing forward link handoff control triggered by a mobile terminal in a UMB network, in accordance with an embodiment of the present invention
  • 5 illustrates a hand-in control device for controlling a mobile terminal to be handed over by another access node to a local access node in an access node of a wireless communication network, in accordance with an embodiment of the present invention
  • FIG. 6 illustrates a cut-out control apparatus for controlling a handover of a mobile terminal from a local access node to another access node in an access node of a wireless communication network, in accordance with an embodiment of the present invention
  • Figure 7 illustrates ancillary means for assisting handover control of an mobile terminal from one access node to another in a mobile terminal of a wireless communication network in accordance with an embodiment of the present invention.
  • the present invention will be mainly described by taking a UMB network as an example, but those skilled in the art can understand that the present invention is applicable to any wireless communication network that generates handover between access nodes, and is particularly suitable for a wireless packet network, wherein This includes but is not limited to 2G, 3G, 3.5G and 4G networks. According to the introduction of the implementation scenario of the UMB network in this specification, those skilled in the art can extend the present invention to other wireless communication networks in which mobile terminals switch between access nodes without any creative labor.
  • Fig. 2 shows a schematic diagram of a wireless communication network in accordance with an embodiment of the present invention.
  • the access nodes 10, 11, 12, 13 and the mobile terminals 21, 22, 23 respectively administer the cells A, B, C, D are included.
  • the mobile terminal 21 is accessing via the access node 11, ie its serving AN is the access node 11; and the mobile terminal 22 is accessing via the access node 12, ie its serving AN is the access node 12;
  • the terminal 23 is being accessed via the access node 13, ie its serving AN is the access node 13.
  • the mobile terminal 21 is using VoIP traffic and gradually moves from the central location of the cell B to the boundary of the cells A, B; 2.
  • the mobile terminal 22 is using FTP to download the service And gradually moving from the central location of the cell C to the boundary of the cells A, C; 3.
  • the mobile terminal 20 does not currently use any service, that is, the idle state after the power-on (Idle) state, and moves to the boundary of the cells A, D.
  • 3 shows a flow chart of a system method for controlling handover triggered by a mobile terminal in an HRPD (a.ka. lxEV-DO) system in accordance with an embodiment of the present invention.
  • HRPD a.ka. lxEV-DO
  • step S1 of repeated execution the mobile terminal 21 continually detects the pilot signal strength from a plurality of nearby ANs, and periodically determines in step S2 whether the condition for triggering the handover is satisfied. Initially, because of its proximity to the service AN, the strength of the pilot signals from other ANs is negligible from the perspective of switching from the perspective of the service AN. Therefore, the mobile terminal 21 reports only the detected pilot signal strength from the access node 11 to the access node 11 based on the prior art.
  • the mobile terminal 21 Since the mobile terminal 21 is using the VoIP service and moving to the border area of the cells A, B. Thus, after detecting the intensity of the pilot signal once, the mobile terminal 21 determines that the condition for triggering the handover has been satisfied.
  • the conditions for the mobile terminal 21 to trigger the handover are various and can be well supported by the mature mechanism in the prior art. For example, it may be triggered when the signal strength from the access node 10 exceeds a predetermined strength threshold, or when the ratio of the signal strength from the access node 10 to the signal strength from the access node 11 exceeds a predetermined ratio threshold. Time to trigger.
  • the mobile terminal 21 generates a handover request message, such as a RUM message in the UMB network.
  • a handover request message such as a RUM message in the UMB network.
  • the mobile terminal 21 includes identification information of the mobile terminal 21 as a handover object, for example, a logical number or the like. This information can be regarded as user characteristic information of the mobile terminal 21.
  • the message further includes a handover priority indication information for indicating a type of service and/or user profile information of the mobile terminal.
  • the handover priority indication information must have a meaning that the access node can know. Specifically, it may be expressed in the form of a binary string or an English string, such as "High” and "Low", for informing the access node, due to the service type of the mobile terminal and/or Or the user characteristic information needs to be switched as indicated by the indication information. According to the present example, if the impact of the user characteristic information on the generation of the handover priority indication information is not considered, if the user terminal uses a service with high delay sensitivity, such as
  • the switching priority indication information in the normally generated handover request message is "High” or a string of other representations equivalent to it.
  • the corresponding switching priority indication information is "Low” or a string of other representations equivalent thereto.
  • the handover request message may not include handover priority indication information, or include a "Low” because the mobile terminal There is no ongoing business and its sensitivity to latency should be minimal.
  • the mobile terminal in the idle state does not need to allocate dedicated radio transmission resources to the access node, and the access node's ability to process the handover request is not a bottleneck in the handover mechanism, that is, the handover request is reached at the same time. How many messages exist, as long as there are enough free radio resources on the AN's air interface, and the mobile terminals requesting handover can implement a higher handover priority for these mobile terminals when the handover can be implemented within an acceptable time.
  • the generation of the handover priority indication information will preferably include the following two parameters: user feature information, service type.
  • user feature information e.g., phone number, phone number, etc.
  • service type e.g., phone number, phone number, etc.
  • the user feature information is unconditionally prioritized over the service type, that is, when the mobile terminal is a gold medal user defined by the operator/network service provider, whether the service type used by the mobile terminal is VoIP or web browsing, "High” is generated. " to indicate the highest switching priority.
  • the service type takes precedence over the user profile information, that is, when the service used by the mobile terminal is a high latency sensitive service, even if the user belongs to the least paid and least valued Bronze user, "High" is generated to indicate The highest switching priority.
  • the target node may face multiple Switching the mobile terminal with the priority of "High" requesting handover, in this case, it may be processed in the chronological order in which the request message is received, or the switching priority indication information may be further refined based on the idea of the present invention, or the handover priority may be prioritized.
  • the number of levels of handover priority indicated by the level indication information is increased to try to make priority differences for different handover requests.
  • the details are as follows:
  • the priority level is further differentiated according to the type of service, that is, the highest priority is achieved for the gold medal user who uses the VoIP or VT service, and then Switching is done for Gold users who use other services.
  • the time of receiving the handover request message may be used as a reference for determining the sequence in which the handover needs are met.
  • the generated handover request message will be sent to the access node 11 in step S3.
  • the access node 11 forwards the handover request message to the target AN, the access node 10.
  • the forwarding mentioned here should be understood as the forwarding of the "handover request”.
  • the specific implementation form further includes: the access node 11 parses the incoming handover request message, ie, the RUM, and obtains the handover priority from the access priority.
  • the indication information is added to the generated A 16-Session Transfer Request message and sent to the target ⁇ in step S4.
  • step S5 the access node 10 obtains handover priority related information related to the service type and/or user characteristic information of the mobile terminal 21 based on the received handover request message, for example, A-Session Transfer Request.
  • the access node 10 extracts the handover priority indication information from the A16-Session Transfer Request, and then preferably, the access node 10 determines whether the handover priority indicated by the handover priority indication information is legal.
  • the above generation method 2 is adopted when the mobile terminal does not generate the handover priority indication information, and therefore, the handover request originating from the mobile terminal 21 should contain "High" is the indication.
  • the access node 10 can know the type of service that the mobile terminal 21 is currently performing, for example, initiating a query to the source AN, and then determining that the extracted handover priority indication information is legal. This is thus taken as the switching priority related information finally obtained in step S5, which information is related to the service type and user characteristic information in this example, and then proceeds to step S6.
  • step S6 the access node 10 determines whether to allow the handover to be performed based on the obtained handover priority related information related to the service type and user characteristic information of the mobile terminal 21. Specifically and preferably, the access node 10 determines different handover request processing mechanisms based on its current load conditions.
  • the access node 10 periodically determines and maintains its own load condition, or determines each time a handover request message is received.
  • the load of an access node mentioned herein generally refers to the occupancy or total amount of transmission resources on its air interface.
  • the load should be understood as any possible restriction on the access node 10 to satisfy the handover of the mobile terminal.
  • the load of the requested resource that is, if the processor speed of the access node 10 is very slow, it takes a long time for the multiple handover request messages to be processed to be parsed, regardless of whether the request is allowed or not. If it is rejected, then even if the resources on the air interface are sufficient, the traffic of the mobile terminal with high handover priority will be interrupted due to the delay caused by waiting for the handover.
  • the situation that the access node has poor processing capability is extremely extreme. Therefore, the load specific indication of the transmission resource occupancy on the air interface is taken as an example.
  • the access node 10 can select the request for each mobile terminal according to the traditional handover processing mechanism.
  • the handover responds.
  • the radio resource can be allocated to the access node in the chronological order of the access request message.
  • a handover response message is generated, which includes related information indicating the radio resource allocated to the mobile terminal 21 , and then the access node 11 obtains related information of the radio resource from the handover response message, and informs the mobile terminal 21 , to achieve switching.
  • the vacant transmission resources on the air interface are very limited, for example, only one
  • the VoIP service or the cut-in of a web browsing service based on the assumption of the mobile terminal 22 above, that is, the mobile terminal 22 is using FTP to download the service and gradually moving from the central location of the cell C to the boundary of the cells A and C, and thus Based on the above-described handover priority indication information generation mode 2, the handover request message corresponding to the mobile terminal 22 correspondingly includes the indication information "Low".
  • the handover priority of the mobile terminal 21 is higher.
  • the access node 10 preferentially allocates its remaining wireless transmission resources to the mobile terminal 21 to complete the handover.
  • the access node 10 may choose to directly send a corresponding response message indicating that the handover request of the mobile terminal 22 is rejected, as shown in step S7 in the figure.
  • the access node 10 may choose to postpone the request, that is, during the validity period of the request, if some other mobile terminal terminates the service or switches to another access node, the vacated radio resource It can be assigned to the mobile terminal 22 to complete this handover.
  • the process of determining whether the handover priority indication information in step S5 is legal is additionally introduced. It is well known that there is absolutely no malicious user in the communication network in an ideal state. Therefore, it is not excluded that the user tampers with the handover priority indication information in the generated handover request message by illegal means, that is, one is using web browsing.
  • the Bronze user of the service whose mobile terminal generates a handover request message containing "High".
  • the access node is further required to perform the screening in step S5.
  • the access node 10 as the target AN may initiate a query to the source node, thereby knowing the type of service that the user is actually using, and according to the user of the user.
  • the feature information and the service type determine the switching priority that it should have, and compare with the content of the handover priority indication information. If the latter is found to be higher than the former, the handover priority indicated by the handover priority indication information is determined. Level is not legal.
  • the access node 10 has the following two options: 1. The handover priority re-determined by the access node 10 according to the collected information is taken as the obtained handover priority of the mobile terminal, and further Perform the subsequent step S6; 2. reject the handover request of the mobile terminal.
  • the handover request message generated by the mobile terminal 21 includes its user feature information, and service type related information of the service that the mobile terminal 21 is using.
  • the "service type related information” includes any information that enables the target AN to know the service type of the mobile terminal. The following is still exemplified with reference to FIG. 3. Here, for the sake of brevity, the The repetitive description above focuses on the differences from the above using the "switching priority indication information".
  • step S3 the mobile terminal 21 generates a handover request message containing its user characteristic information, such as a logical number, and service type related information.
  • the form of the service type related information is, for example but not limited to, "000”, indicating VoIP; "001”, indicating VT; "010”, indicating FTP; "011”, indicating web browsing; "100”, indicating idle.
  • the access node 10 determines the handover priority of the mobile terminal based on the user characteristic information and the service type related information.
  • the specific method uses, for example, the idea of any one of the foregoing switching priority indication information generating manners.
  • the subdivision can be further based on the user level (gold medal, silver medal, bronze medal user) corresponding to the user characteristic information.
  • step S6 is consistent with the description above, and will not be described again.
  • the handover request message generated by the mobile terminal 21, such as RUM includes only user feature information of the corresponding user. Therefore, after forwarding by the source AN, the target AN, that is, the access node 11 only knows which mobile terminal and the corresponding user are requesting handover.
  • step S5 has the following alternative implementations:
  • the access node 10 determines the handover priority related information of the handover request only according to the user characteristic information. Specifically, the access node 10 determines that the mobile terminal belongs to a gold medal, The silver medal is also a bronze medal user and is given a high to low priority accordingly. Generally, in order to avoid confusion, each mobile terminal follows the same rule, and thus, the handover request message from other mobile terminals also contains only user characteristic information. At this time, the handover request of the gold medal user unconditionally takes precedence over the handover request of the silver medal user, after It also unconditionally takes precedence over the Bronze user's switching request. The order of priority of the refinement is determined by the order in which the handover request messages are received between the handover requests of users of the same level.
  • step S 5 The implementation method of step S 5 is as follows:
  • the source AN Since the source AN is aware of the service type of the service currently used by the mobile terminal requesting the handover, after receiving the handover request message delivered in step S4, the service is initiated to the corresponding source AN according to the user feature information therein.
  • the query of the type related information, and the subsequent priority determination based on the query result is provided.
  • the foregoing implementation manner 2 has the following modification, that is, after receiving the handover request message sent in step S3, the access node 11 checks whether the service type related information is included therein, and after learning that there is no service type related information, The ingress node 11 actively queries the service type of the service currently used by the mobile terminal, and writes the corresponding service type related information into the message that needs to be sent to the access node 10 in step S4, thereby facilitating the hand-in control.
  • the handover process in which the active AN participates in the handover process above is especially applicable to 2G and 3G communication networks. For 3.5G and 4G communication networks, the handover process is independent of the source AN, and the flow chart is briefly described as follows.
  • FIG. 4 is a flow diagram of a system method for performing forward link handover control triggered by a mobile terminal in a UMB network, in accordance with an embodiment of the present invention. It is understood by those skilled in the art that in a UMB network, since there are definitions of a forward link and a reverse link, and the forward link and the reverse link of the mobile terminal can be served by different access nodes, therefore, Only one of the links will be described hereinafter and does not affect the disclosure of the present invention.
  • the mobile terminal 21 can also be referred to as an AT according to custom, and the source AN is a forward link enhanced serving base station (FLSE, Forward Link). Serving eBS), the target AN is an ideal forward link enhanced service base station (DFLSE).
  • FLSE forward link enhanced serving base station
  • DFLSE forward link enhanced service base station
  • the mobile terminal 21 is in VoIP communication with a network entity 25 not shown in the figure.
  • the network entity may also be referred to as a DAP, ie, a Data Attachment Point, and the forward chain of the mobile terminal 21
  • the handover process will mainly discuss the update of the transmission path of IP voice data from the DAP. Steps S41 and S42 are similar to S1 and S2 in FIG. 3, respectively, and are not described again.
  • the mobile terminal 21 In step S43, the mobile terminal 21 generates a handover request message, which may only contain corresponding user feature information, and may further include service type related information and/or handover priority indication information.
  • the various information components in the message have been discussed separately above and will not be described again.
  • the handover request message in this example is directly sent by the mobile terminal 21 to the target AN, that is, the access node 10, via the physical layer and the MAC layer channel [R-CDCCH, rcqich].
  • the R-CDCCH is a reverse CDMA data control channel, that is, a Reverse CDMA Data Control Channel
  • the rcqich is a reverse channel quality indication channel, that is, a Reverse Channel Quality Indication Channel.
  • steps S44 and S45 are the same as steps S5 and S6 in Fig. 3, respectively, and will not be described again.
  • step S46 the DFLSE uses the forward link allocation block (FLAB) to allocate the switched radio transmission resources to the AT. And in step S47, it is notified that the DAP handover has occurred, and the subsequent data is sent to the access node.
  • FLAB forward link allocation block
  • the DAP and the AT respectively transmit and receive the IP voice data on the forward link according to the above indication of the DFLSE, and the handover is smoothly implemented.
  • the handover procedure triggered by the mobile terminal is mainly described.
  • the handover is triggered by the source AN. This may be due to the consideration of balancing the load between the access nodes, and preferably requires interworking load information between the various access nodes. For example, referring to FIG. 2, when the mobile terminal 21 is in a certain position between the access nodes 10, 11, its serving AN, that is, the access node 11 appears in the user side air. The wireless transmission resource of the interface is overloaded.
  • the access node 11 learns that the quality of the transmission channel between the mobile terminal 21 and the access node 10 is sufficient according to the quality of the pilot signal reported by the mobile terminal 21, without the terminal triggering the handover. Supporting the transmission of IP voice data, and the idle wireless transmission resources of the access node 10 are more, and thus, the access node 11 actively triggers the mobile terminal 21 to access the forward link via the access node 11 to the access node 10 Accessing the handover of the forward link. Specifically, and preferably, in the handover request message sent by the access node 11 to the access node 10, the service type related information of the service that the mobile terminal 21 is currently performing, such as "000", indicates VoIP.
  • the access node 10 can perform subsequent operations based on the manner described above, see the description of steps S5, S6 in FIG. 3 and S44 and S45 in FIG. .
  • the amount of buffered data in the reverse link of the UMB system, maximum latency is used in conjunction with the present invention.
  • the present invention has been described above from a method perspective, and is further explained below with reference to a specific device block diagram in conjunction with FIG. 2, and still follows the following assumptions: 1.
  • the mobile terminal 21 is using VoIP traffic and is from the center of the cell B. The location gradually moves to the boundary of the cells A, B; 2.
  • the mobile terminal 22 is using FTP to download the service and gradually moves from the central location of the cell C to the boundary of the cells A, C; 3.
  • the mobile terminal 20 does not currently use any service, That is, it is in the idle state after power on, and moves to the boundary of cells A and D.
  • Figure 5 illustrates a hand-in control device for controlling a mobile terminal to be handed over by another access node to a local access node in an access node of a wireless communication network, in accordance with an embodiment of the present invention.
  • 6 shows a cut-out control apparatus for controlling a mobile terminal to switch from a local access node to another access node in an access node of a UMB network, in accordance with an embodiment of the present invention. It is considered that the access node will encounter the mobile terminal cut-in and cut-out. Therefore, the illustrated hand-in control device 50 and the cut-out control device 60 are preferably located in the respective access nodes shown in FIG.
  • the cutting control device 50 includes: a first receiving device 500, an obtaining device 501 and processing device 502, the obtaining device 501 further includes a first extracting device 5010, a query device 5011, a second extracting device 5012, and a determining device 5013.
  • the processing device 502 further includes a load determining device 5020 and a slave processing device 5021.
  • the cut-out control device 60 includes: a first providing device 600, a switching response receiving device 601, a second providing device 602, and a second receiving device 603.
  • Figure 7 illustrates an auxiliary device for assisting handover control of an mobile terminal from one access node to another in a mobile terminal of a wireless communication network in accordance with an embodiment of the present invention.
  • the illustrated auxiliary device 70 is preferably located in each of the mobile terminals shown in FIG. 2.
  • the auxiliary device 70 includes a third providing device 700, which specifically includes: a handover request generating device 7000 and a handover request transmitting device 7001, where the handover request generating device 7000 further includes: an indication information generating device 70000, a message generating device 70001.
  • a detecting means not shown in the figure, at the mobile terminal 21 constantly detects the pilot signal strength from a plurality of ANs in the vicinity, and periodically judges whether or not the condition for triggering the switching is satisfied. Initially, since the mobile terminal 21 is closer to the service AN, the strength of the pilot signals from other ANs is negligible from the perspective of switching from the perspective of the service AN. Therefore, the mobile terminal 21 reports only the detected pilot signal strength from the access node 11 to the access node 11 based on the prior art.
  • the detecting means determines that the condition of the trigger switching has been satisfied.
  • the conditions under which the detection device triggers the switching are varied and can be well supported by the proven mechanisms in the prior art. For example, it may be triggered when the signal strength from the access node 10 exceeds a predetermined intensity threshold, or when the ratio of the signal strength from the access node 10 to the signal strength from the access node 11 exceeds a predetermined ratio threshold. To trigger.
  • the handover request generating means 7000 generates a handover request message, such as a RUM message in the UMB network.
  • the identification information of the mobile terminal 21 as the handover target such as a logical number or the like, is included. This information can be seen The user characteristic information of the mobile terminal 21 is made.
  • the handover request message generated by the message generating device 7011 further includes a message generated by the indication information generating device 7010 for indicating a service type and/or user feature information of the mobile terminal. Switching priority indication information.
  • the generation of the handover priority indication information will preferably include the following two parameters: user characteristic information, service type.
  • user characteristic information user characteristic information
  • service type service type
  • the user feature information is unconditionally prioritized over the service type, that is, when the mobile terminal is a gold medal user defined by the operator/network service provider, whether the service type used by the mobile terminal is VoIP or web browsing, "High” is generated. " to indicate the highest switching priority.
  • the service type takes precedence over the user profile information, that is, when the service used by the mobile terminal is a high latency sensitive service, even if the user belongs to the least paid and least valued Bronze user, "High" is generated to indicate The highest switching priority.
  • the target node may face multiple mobile terminals requesting handover with a priority of "High".
  • the target terminal may be processed according to the time sequence in which the request message is received, or
  • the idea of the invention further defines the handover priority indication information in detail, or increases the number of handover priority levels indicated by the handover priority indication information, so as to try to make different handover requests have priority differences.
  • the details are as follows:
  • the priority level is further differentiated according to the type of service, that is, the highest priority is achieved for the gold medal user who uses the VoIP or VT service, and then Switching is done for Gold users who use other services.
  • the respective switching needs are met in the order of gold, silver and bronze users.
  • the time of receiving the handover request message may be used as a reference for determining the sequence in which the handover needs are met.
  • the handover request message generated by the message generating means 7011 is sent to the access node 11 by the handover request transmitting means 7001.
  • the second receiving device 603 at the access node 11 receives the handover request message and forwards the handover request message to the target AN, i.e., the access node 10, by the first providing device 600.
  • the forwarding referred to here is to be understood as the forwarding of the "handover request”.
  • the specific implementation form further includes: the first providing device 600 parses the incoming handover request message, that is, the RUM, and obtains the handover priority.
  • the level indication information is added to the generated A 16-Session Transfer Request message and sent to the target AN.
  • the obtaining device 501 After receiving the handover request message from the access node 11, for example, the A-Session Transfer Request, the obtaining device 501 obtains the service type with the mobile terminal 21 and/or according to the message, the first receiving device 500 at the access node 10. Or switching priority related information related to user characteristic information.
  • the first extraction means 5010 extracts the handover priority indication information from the A16-Session Transfer Request, and then, preferably, the determination means 5013 determines whether the handover priority indicated by the handover priority indication information is legal. .
  • the mobile terminal generates the handover priority indication information in the above-described generation mode 2, and therefore, the handover request originating from the mobile terminal 21 should include the indication information "High".
  • the access node 10 can know the type of service that the mobile terminal 21 is currently performing, for example, initiating a query to the source AN, and the determining device 5013 determines that the extracted handover priority indication information is legal. Thus, it is taken as the handover priority related information finally obtained by the obtaining means 501, which information is related to the service type and the user characteristic information in this example.
  • the processing device 502 determines whether to perform the handover according to the obtained handover priority related information related to the service type and the user feature information of the mobile terminal 21.
  • the load determining device 5020 and the slave processing device 5021 are connected thereto.
  • Incoming node 10 current load conditions to determine different handover request processing mechanisms.
  • the load determining means 5020 periodically determines and maintains its own load, or re-determined at each time it receives the handover request message.
  • the load of an access node mentioned herein generally refers to the occupancy or total amount of transmission resources on its air interface. Of course, the load should be understood as any possible restriction on the access node 10 to satisfy the handover of the mobile terminal.
  • the load of the requested resource that is, if the processor speed of the access node 10 is very slow, it takes a long time for the multiple handover request messages to be processed to be parsed, regardless of whether the request is allowed or not. If it is rejected, then even if the resources on the air interface are sufficient, the traffic of the mobile terminal with high handover priority will be interrupted due to the delay caused by waiting for the handover. Of course, the situation that the access node has poor processing capability is extremely extreme. Therefore, the load specific indication of the transmission resource occupancy on the air interface is taken as an example.
  • the lower load means that the access node 10 has sufficient transmission resources on the air interface on the user side for allocation. Therefore, the slave processing device 5021 can select to respond to the handover requested by each mobile terminal according to the conventional handover processing mechanism.
  • the radio resource may be allocated to the access node in the chronological order of the access request message.
  • a handover response message is generated from the processing device 5021, and includes related information indicating a radio resource allocated to the mobile terminal 21, the handover response message being received by the handover response receiving device 601 at the access node 11 and provided to the second
  • the device 602 is further provided, and the latter obtains related information of the radio resource from the handover response message, and informs the mobile terminal 21 to implement handover.
  • the load judging device 5020 finds that the access node 10 has already undertaken a large number of mobile terminal service transmission operations, the vacant transmission resources on the air interface are very limited, for example, only one VoIP service or one web browsing service can be satisfied. Plunging, based on the assumption of the mobile terminal 22 above, that the mobile terminal 22 is using FTP to download traffic and gradually moving from the central location of the cell C to the boundary of the cells A, C, and thus, based on the above handover priority indication In the information generation method 2, the handover request message corresponding to the mobile terminal 22 correspondingly includes the indication information "Low".
  • the processing device 5021 preferentially allocates only the remaining radio transmission resources to the mobile terminal 21 to complete the handover.
  • the processing device 5021 may choose to directly send a corresponding response message indicating that the handover request of the mobile terminal 22 is rejected, and may be received by the handover response receiving device 601 at the access node 11.
  • the second providing means 602 is used to inform the mobile terminal 21 of the corresponding information based on the message.
  • the processing device 5021 may choose to postpone the request, that is, during the validity period of the request, if some other mobile terminal terminates the service or switches to another access node, the vacated radio resource It can be assigned to the mobile terminal 22 to complete this handover.
  • the process of determining whether the handover priority indication information performed by the determining means 5013 at the access node 10 is legal is additionally introduced. It is well known that in a communication network, there is absolutely no malicious user in an ideal state. Therefore, it is not excluded that a user tampers with the possibility of switching priority indication information in the generated handover request message by an illegal means, that is, one is using The Bronze user of the web browsing service generates a handover request message containing "High" for the mobile terminal. At this time, the determining device 5013 of the access node 10 is further required to perform screening.
  • the access node 10 as the target AN may initiate a query to the source node, thereby knowing the type of service that the user is actually using, and according to the user.
  • User characteristic information and service type to determine the switching priority that it should have, and compare with the content of the handover priority indication information. If the latter is found to be higher than the former, it is determined by the handover priority indication information. Switching priority is invalid.
  • the slave processing device 5021 at the access node 10 has the following two options: 1.
  • the handover priority re-determined by the access node 10 according to the collected information is taken as the obtained mobile terminal. Switching priority, and then performing the subsequent step S6; 2. rejecting the handover request of the mobile terminal.
  • the handover request message generated by the handover request generating apparatus 7000 at the mobile terminal 21 includes its user characteristic information, and The service type related information of the service being used by the mobile terminal 21.
  • the service type related information includes any information that enables the target AN to know the type of service of the mobile terminal.
  • the cut-in control device 50, the cut-out control device 60, and The working process of the auxiliary device 70 is as follows.
  • the handover request generating means 7000 generates a handover request message containing its user characteristic information (e.g., logical number) and service type related information.
  • the form of the service type related information is, for example but not limited to, "000”, indicating VoIP; "001”, indicating VT; "010”, indicating FTP; "011”, indicating web browsing; "100” (representing idle).
  • the access node 10 determines the handover priority of the mobile terminal based on the user feature information and the service type related information. Specifically, the service type related information is extracted from the second extraction device 5012, and is sent to the query device 5011. Then, the query device 5011 obtains the corresponding idea by using any of the foregoing methods for switching the priority indication information generation manner. Switch priority related information. Wherein, when the idea of the mode 2 is utilized, if a priority difference cannot be formed between two or more handover requests according to the service type, the user level corresponding to the user feature information, such as a gold medal or a silver medal, may be further , Bronze users, to subdivide.
  • the handover request message generated by the message generating means 7011 at the mobile terminal 21, such as RUM contains only user characteristic information of the corresponding user. Then, after being forwarded by the source AN, the target AN, that is, the access node 11 only knows at this time which mobile terminal and the corresponding user are requesting handover. At this time, the working mode of the obtaining device 501 includes but is not limited to the following cases:
  • the implementation of the obtaining device 501 is as follows:
  • the handover priority related information of the handover request is determined only according to the user characteristic information. Specifically, the access node 10 determines whether the mobile terminal belongs to a gold medal, a silver medal, or a bronze medal user, and assigns a high to low priority accordingly. Usually, in order to avoid confusion, each mobile terminal follows the same rules, and thus, the handover request from other mobile terminals is eliminated.
  • the information also contains only user feature information. At this time, the gold card user's switching request unconditionally takes precedence over the silver card user's switching request, and the latter unconditionally takes precedence over the bronze user's switching request.
  • the order of priority of the refinement is determined by the order in which the handover request messages are received between the handover requests of users of the same level.
  • the implementation mode 2 of the obtaining device 501 is as follows:
  • the obtaining means 501 initiates the corresponding source AN according to the user feature information included in the handover request message received by the first receiving device 500.
  • the query of the business type related information, and the subsequent priority determination based on the query result is a simple operation that uses the query to determine the priority of the query result.
  • the foregoing implementation manner 2 has a modification that after the second receiving device 603 at the access node 11 receives the handover request message sent by the mobile terminal 21, the first providing device 600 checks whether the message includes the service type. Related information, after learning that there is no service type related information, the first providing device 600 actively queries the service type of the service currently used by the mobile terminal, and writes the corresponding service type related information to the access node. 10 in the message, thereby helping the latter to perform the cut-in control.
  • the switching process involved in the switching process described above is particularly applicable to 2G and 3G communication networks. For 3.5G and 4G communication networks, the handover process is independent of the source AN.
  • the UMB network is used as an example to describe the device block diagram as follows.
  • the mobile terminal 21 is also referred to as an AT, and the source AN is a Forward Link Serving eBS (FLSE), and the target AN is an ideal forward link enhanced serving base station ( DFLSE, Desired Forward Link Serving eBS) 0
  • FIG mobile terminal 21 being in communication with VoIP network entities not shown in FIG. 25 a, which may also be referred to as the DAP entity, i.e., a data attachment point (data attachment point), and
  • the handover process will be the main To update the transmission path of IP voice data from DAP.
  • the handover request generating means 700 at the mobile terminal 21 generates a handover request message, which may include only the corresponding user feature information, and may further include service type related information and/or handover priority indication information.
  • the various information components in the message have been discussed separately above and will not be described again.
  • the handover request message in this example is directly transmitted by the handover request transmitting apparatus 7001 to the target AN, that is, the access node 10, via the physical layer and the MAC layer channel [R-CDCCH, rcqich].
  • R-CDCCH is a reverse CDMA data control channel, that is, a Reverse CDMA Data Control Channel
  • rcqich is a reverse channel shield indicating channel, that is, a Reverse Channel Quality Indication Channel.
  • the slave processing device 5021 at the DFLSE uses the Forward Link Assignment Block (FLAB) to allocate the switched radio transmission resource to the AT, and notifies that the DAP handover has occurred. , please send subsequent data to the access node.
  • FLAB Forward Link Assignment Block
  • the DAP and the AT respectively transmit and receive the IP voice data on the forward link according to the above indication of the DFLSE, and the handover is smoothly implemented.
  • the handover procedure triggered by the mobile terminal is mainly described.
  • the handover is triggered by the source AN. This may be due to the consideration of balancing the load between the access nodes, and preferably requires interworking load information between the various access nodes. For example, referring to FIG. 2, when the mobile terminal 21 is in a certain position between the access nodes 10, 11, the serving AN, that is, the access node 11, has a problem that the wireless transmission resource of the user-side air interface is overloaded.
  • the access node 11 does not wait for the terminal to trigger the handover, and the access node 11 learns that the quality of the transmission channel between the mobile terminal 21 and the access node 10 is sufficient to support the transmission of IP voice data according to the quality of the pilot signal reported by the mobile terminal 21, and the access node 10 more idle wireless transmission resource, then the access node 11 through the first active thereon to provide a trigger device 10 to 60021 from the mobile terminal via the front contact 11 to access the access node to the access node via a link Switching into the forward link.
  • the service type related information of the service that the mobile terminal 21 is currently performing such as "000” indicates VoIP.
  • the access node 10 can perform subsequent operations based on the manner described above.

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

Abstract

Un procédé et un dispositif de commande du transfert intercellulaire d’un terminal mobile selon lequel après avoir reçu une demande de transfert intercellulaire d’un nœud source, le nœud destinataire décide comment traiter ladite demande de transfert intercellulaire à partir des informations prioritaires correspondantes contenues dans la demande concernant les informations concernant le type de service et/ou les caractéristiques de l’utilisateur d’un terminal mobile, par exemple quand il y a une tension au niveau des ressources d’une voie de communication de l’AN, ledit AN peut refuser ou mettre en attente les demandes de transfert intercellulaire peu prioritaires, et utiliser les ressources limitées pour effectuer les transferts intercellulaires des utilisateurs prioritaires.
PCT/CN2008/001254 2008-07-01 2008-07-01 Procédé et dispositif de commande du transfert intercellulaire d’un terminal d’un réseau de communication sans fil WO2010000092A1 (fr)

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CN2008801296994A CN102057737A (zh) 2008-07-01 2008-07-01 无线通信网络中的终端切换控制方法和装置
PCT/CN2008/001254 WO2010000092A1 (fr) 2008-07-01 2008-07-01 Procédé et dispositif de commande du transfert intercellulaire d’un terminal d’un réseau de communication sans fil

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CN110351796B (zh) * 2018-04-08 2023-06-16 维沃移动通信有限公司 一种网络间互操作的方法、终端及网络单元
CN113032842B (zh) * 2019-12-25 2024-01-26 南通理工学院 基于云平台的网页防篡改系统及方法
CN112543490B (zh) * 2020-11-24 2023-07-14 上海擎昆信息科技有限公司 用户设备准入的方法和装置、以及用户设备切换的方法和装置

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