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WO2011160469A1 - Procédé et système de réalisation de communication de groupe - Google Patents

Procédé et système de réalisation de communication de groupe Download PDF

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Publication number
WO2011160469A1
WO2011160469A1 PCT/CN2011/071494 CN2011071494W WO2011160469A1 WO 2011160469 A1 WO2011160469 A1 WO 2011160469A1 CN 2011071494 W CN2011071494 W CN 2011071494W WO 2011160469 A1 WO2011160469 A1 WO 2011160469A1
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WO
WIPO (PCT)
Prior art keywords
cluster
base station
terminal
communication mode
communication
Prior art date
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Ceased
Application number
PCT/CN2011/071494
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English (en)
Chinese (zh)
Inventor
郄小丹
张现周
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ZTE Corp
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ZTE Corp
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Filing date
Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Publication of WO2011160469A1 publication Critical patent/WO2011160469A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/52—Allocation or scheduling criteria for wireless resources based on load

Definitions

  • the present invention relates to a trunking communication technology, and more particularly to a method and system for implementing cluster communication. Background technique
  • the trunked communication system is a dedicated wireless communication system developed for industry-specific applications to meet the needs of industry users.
  • a large number of wireless users share a small number of wireless channels, and the command and dispatch is the main application. It is a versatile and high-performance wireless communication system.
  • the trunking communication system has a wide application market in the fields of government departments, public safety, emergency telecommunications, electric power, civil aviation, petrochemicals and military.
  • Unicast is peer-to-peer communication
  • multicast is point-to-multipoint communication.
  • Unicast communication has a good user experience for quality of service and timely response.
  • the quality of the service can be improved by ensuring the quality of the call while ensuring resource conservation.
  • a method for implementing cluster communication including:
  • the base station presets a communication mode selection policy
  • the clustering base station selects a policy according to the communication mode, and selects unicast or multicast mode for communication.
  • the communication mode selection policy is set according to the situation of the base station.
  • the communication mode selection policy is: when the base station load exceeds a preset threshold, the communication mode is a multicast mode, and when the base station load is lower than a preset threshold, the communication mode is a unicast mode.
  • the selecting the policy according to the communication mode and selecting the unicast or multicast mode for the communication includes: the base station querying the load situation, and if the current load result is lower than the preset threshold, the terminal in the trunk call is in the call.
  • the service selection uses the unicast communication mode to communicate; if the current load result exceeds the preset threshold, the terminal in the trunk call selects the multicast communication mode to communicate in the call service;
  • the cluster base station periodically sends a cluster page in the cell, and the paging message carries a communication mode flag indicating whether the unicast mode or the multicast mode is used;
  • the base station performs communication for allocating resources for the call service of the terminal in the trunk call according to the selected communication mode.
  • the selected communication mode is a unicast communication mode; and the allocating resources for the call service of the terminal according to the selected communication mode includes:
  • the terminal that receives the paging of the cluster establishes a connection with the base station and the core network respectively, and the base station establishes an instance for each terminal; the core network forwards the received uplink cluster data to each instance, and then each instance separately Send to the corresponding called terminal for communication.
  • the selected communication mode is a multicast communication mode; and the allocating resources for the call service of the terminal according to the selected communication mode includes:
  • the cluster base station establishes a cluster instance for the cluster terminal, and the core network sends the received uplink cluster data to the established cluster instance, and then the cluster instance sends the data to the cluster terminal for communication.
  • the preset threshold is a load value, or a load percentage value, or a number of users that can be accommodated on the network side.
  • a system for implementing cluster communication comprising at least a base station, and a plurality of terminals participating in the cluster communication, wherein
  • the terminal includes a calling terminal and a called terminal group composed of at least one terminal, and is used to initiate a trunking call, and the calling terminal and the called terminal group communicate according to the unicast or multicast mode selected by the base station.
  • the communication mode selection strategy is: when the base station load exceeds a preset threshold, the communication mode is multicast mode communication, and when the base station load is lower than a preset threshold, the communication mode is unicast communication.
  • the base station is specifically configured to:
  • the base station receives the cluster call from the terminal side to query the load situation.
  • the terminal determines that the terminal in the trunk call selects the unicast communication mode in the call service.
  • the cluster base station periodically sends a cluster page in the cell,
  • the paging message carries a communication mode flag indicating whether the unicast mode or the multicast mode is used;
  • the base station performs communication for allocating resources for the call service of the terminal in the trunk call according to the selected communication mode.
  • the system also includes a core network
  • the selected communication mode is a unicast communication mode
  • the terminal that receives the paging of the cluster is specifically configured to establish a connection with the base station and the core network to which the node belongs.
  • the base station is further configured to establish an instance for each terminal separately;
  • the core network After receiving the uplink cluster data, the core network forwards the received uplink cluster data to each instance, and then sends each instance to the corresponding called terminal.
  • the selected communication mode is a multicast communication mode
  • the cluster base station is further configured to establish a cluster instance for the cluster terminal;
  • the core network is configured to receive uplink cluster data, forward the received uplink cluster data to the established cluster instance, and then send the data to the cluster terminal by the cluster instance.
  • the base The station selects a policy according to the communication mode, and selects unicast or multicast mode for communication.
  • the unicast communication mode is selected; and when the base station is heavily loaded (the current load result exceeds the preset threshold), the selection is used.
  • Multicast communication method The invention combines the unicast and multicast communication modes well, so that the respective advantages of the two are fully embodied in the cluster system. The method of the invention not only ensures the communication quality to the greatest extent, but also saves the system resources under the condition of high system load, improves the system capacity, thereby improving the service quality and ensuring the user experience.
  • FIG. 1 is a flowchart of a method for implementing cluster communication according to the present invention
  • FIG. 2 is a schematic structural diagram of a system for implementing cluster communication according to the present invention.
  • FIG. 3 is a flowchart of a first embodiment of a method for implementing trunking communication according to the present invention
  • FIG. 4 is a flow chart of a second embodiment of a method for implementing trunking communication according to the present invention. detailed description
  • FIG. 1 is a flowchart of a method for implementing trunking communication according to the present invention. As shown in FIG. 1, the method includes: Step 100: A base station presets a communication mode selection policy.
  • the communication mode selection policy is set according to the situation of the base station. For example, when the base station load condition is set, the communication mode selection strategy is: when the base station load level exceeds a certain threshold, the communication mode is multicast mode, when the load is When the degree is lower than a certain threshold, the communication mode is unicast.
  • the preset threshold may be a load value, or a load percentage value, or a number of users that can be accommodated on the network side.
  • Step 101 When the terminal initiates a trunking call, the clustering base station selects a policy according to the communication mode, and selects a unicast or multicast mode for communication.
  • the base station to which each cluster terminal in the cluster group call belongs is also referred to as a cluster base station.
  • the specific implementation of this step generally includes:
  • the terminal when the terminal initiates a trunking call, it establishes a connection with the base station and the core network.
  • the core network receives the initial UE context message, it finds that the current call is a cluster call, triggers the cluster paging, and initiates a cluster search to the cluster base station. call.
  • the specific implementation belongs to the prior art, and the implementation method thereof is not used to limit the scope of the present invention.
  • the cluster base station After receiving the paging of the cluster, the cluster base station assumes that the cluster base station selects a communication mode according to the load condition, and then the cluster base station queries the load condition. If the current load result is lower than the preset threshold, the terminal in the trunk call In the call service selection, the unicast communication mode is used for communication; if the current load result exceeds the preset threshold, the terminal in the trunk call selects the multicast communication mode to communicate in the call service; A cluster instance is set up immediately after the paging of the cluster, and the cluster page is periodically sent in the cell.
  • the paging message carries a communication mode flag indicating whether the mode is unicast or multicast.
  • the base station allocates resources for the call service of the terminal in the trunking call according to the selected communication mode, and then performs communication: if the communication mode flag is displayed in the multicast mode, the core network receives the uplink cluster data, and then uplinks the cluster.
  • the data is forwarded to the cluster instance of all the cluster base stations (that is, the cluster instance established immediately after the cluster base station receives the cluster paging), and then the cluster instance sends the data to the cluster terminal (the called terminals participating in the cluster communication);
  • the terminal is configured to display the connection to the base station and the core network, and the base station establishes an instance for each terminal.
  • the core network After receiving the uplink cluster data, the core network forwards the uplink cluster data to each base station.
  • the instances built by the called terminal under its jurisdiction are respectively sent to their corresponding called terminals.
  • the unicast communication mode is adopted; and when the base station is heavily loaded (the current load result exceeds the preset threshold), Use multicast communication.
  • the method of the invention not only ensures the communication quality to the greatest extent, but also saves the system resources under the condition of high system load, improves the system capacity, thereby improving the service quality and ensuring the user experience.
  • a system for implementing cluster communication is provided. As shown in FIG. 2, at least a base station and a plurality of terminals are included, where
  • the base station where the communication mode selection policy is set; is used for receiving the cluster call initiated by the terminal, selecting a policy according to the communication mode, and selecting the unicast or multicast mode for communication.
  • the base station to which each cluster terminal in the cluster group belongs is also referred to as a cluster base station.
  • the terminal includes a calling terminal and a called terminal group composed of at least one terminal, and is used to initiate a trunking call, and the calling terminal and the called terminal group communicate according to the unicast or multicast mode selected by the base station.
  • the communication mode selection strategy is as follows: When the load level exceeds the preset threshold, the communication mode is multicast mode communication, and when the base station load level is lower than the preset threshold, the communication mode is unicast mode. Communication.
  • FIG. 3 is a flowchart of a first embodiment of a method for implementing trunking communication according to the present invention.
  • the terminal 1 initiates a trunking call
  • the terminal 2 is a called terminal in the cluster group
  • the threshold value when the base station load is lower than the load threshold, is called light load.
  • the base station load exceeds the load threshold, it is called heavy load.
  • the base station to which each cluster terminal in the cluster group belongs is also referred to as a cluster base station. As shown in Figure 3, the following steps are included:
  • Step 300 The terminal 1 initiates a trunk call, and the terminal 1 sends a random access request message to the base station.
  • Step 302 The terminal 1 sends a radio link control (RRC) setup request message on the uplink resource allocated thereto.
  • RRC radio link control
  • Step 303 The base station returns an RRC setup message to the terminal 1.
  • Step 304 After receiving the RRC setup message, the terminal 1 sends an RRC setup complete message to the base station.
  • the RRC setup complete message carries the non-access stratum message, and the non-access stratum message includes the cluster number information.
  • Step 305 The base station receives an RRC setup complete message, and sends an initial terminal (UE) to the core network. Context message.
  • Step 306 The core network receives the initial UE context message, finds that the current call is a trunked call, establishes a cluster call instance, triggers the cluster paging, and transmits a cluster bearer setup request message to the cluster base station, and simultaneously sends a base UE context message to the base station. Send back a UE context setup request message.
  • Step 307 The base station receives the UE context setup request message, and sends an RRC reconfiguration message to the terminal 1.
  • Step 308 The terminal 1 receives the RRC reconfiguration message and sends an RRC reconfiguration response message.
  • Step 309 The base station receives the RRC reconfiguration response message, and sends an initial UE context establishment request response message to the core network.
  • Steps 310 to 312 The cluster base station receives the cluster paging, and queries the self-load situation. If the load is heavy at this time, the multicast communication is selected. At the same time, the cluster paging is periodically sent in the cell, and The cluster paging message carries a communication mode flag indicating that the multicast mode is used.
  • Step 313 to step 314 The cluster base station receives the cluster bearer setup request message of the core network, establishes a cluster instance, and sends a cluster bearer setup response message to the core network.
  • Step 315 to Step 317 The core network receives the uplink cluster data, forwards the uplink cluster data to the cluster instance established by the cluster base station, and then sends the data to the terminal 2 by the cluster instance.
  • the terminal 1 and the terminal 2 communicate by means of multicast communication.
  • the steps 307 to 309, and the execution of the steps 310 to 312 and the steps 313 to 314 are not strictly sequential.
  • FIG. 4 is a flowchart of a second embodiment of a method for implementing trunking communication according to the present invention.
  • the terminal 1 initiates a cluster call
  • the terminal 2 is a called terminal in the cluster group
  • the threshold value when the base station load is lower than the load threshold, is called light load.
  • the base station load exceeds the load threshold, it is called heavy load.
  • the base station to which each cluster terminal in the cluster group belongs is also referred to as a cluster base station. As shown in Figure 4, the following steps are included:
  • Step 400 The terminal initiates a trunking call, and the terminal 1 sends a random access request message to the base station.
  • Step 402 The terminal 1 sends an RRC setup request message on the allocated uplink resource.
  • Step 403 The base station returns an RRC setup message to the terminal 1.
  • Step 404 After receiving the RRC setup message, the terminal 1 sends an RRC setup complete message to the base station, where the RRC setup complete message carries the non-access stratum message, and the non-access stratum message includes the cluster number information.
  • Step 405 The base station receives the RRC setup complete message, and sends an initial UE context message to the core network.
  • Step 406 The core network receives the initial UE context message, finds that the current call is a cluster call, establishes a cluster call instance, triggers the cluster paging, sends a cluster bearer setup request message to the cluster base station, and simultaneously sends a cluster UE setup message to the base station. An initial UE context setup request message is sent.
  • Step 407 The base station receives an initial UE context setup request message, and sends an RRC reconfiguration message to the terminal 1.
  • Step 408 The terminal 1 receives the RRC reconfiguration message and returns an RRC reconfiguration response message to the base station.
  • Steps 410 to 412 The cluster base station receives the cluster paging, and queries the load status of the cluster. It is assumed that the load is light at this time, and the unicast mode is selected to communicate, and the cluster paging is periodically sent in the cell, and the paging message is sent. Carry a communication mode flag indicating that the unicast mode is used.
  • Step 413 to step 414 The cluster base station receives the cluster bearer setup request message of the core network, establishes a cluster instance, and returns a cluster bearer setup response message to the core network.
  • Step 415 to step 425 After receiving the page carrying the communication mode flag indicating that the unicast mode is used, the terminal 2 sends a random access request message to the base station;
  • the base station replies to the random access response, and carries the assigned to the terminal 2 in the random access response.
  • the terminal 2 sends an RRC setup request message on the allocated uplink resource; the base station returns an RRC setup message to the terminal 2; after receiving the RRC setup message, the terminal 2 sends an RRC setup complete message to the base station, and the base station receives the RRC setup complete message.
  • the core network sends an initial UE context setup request message to the base station to establish an instance for the terminal 2; after receiving the initial UE context setup request message, the base station sends the initial UE context setup request message to the terminal 2 Sending an RRC reconfiguration message; the terminal 2 receives the RRC reconfiguration message, and returns an RRC reconfiguration response message; the base station receives the RRC reconfiguration response message, and returns a UE context establishment request response message to the core network.
  • Step 426 to step 428 The core network receives the uplink cluster data, and forwards the uplink cluster data to the instance established by the terminal 2 to which the terminal 2 belongs, and then sends the instance to the called terminal 2.
  • steps 407 to 409, and steps 410 to 412, and steps 413 to 414 are not strictly sequential.

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

Abstract

La présente invention porte sur un procédé et un système de réalisation de communication de groupe, le procédé comprenant les opérations suivantes : lorsque le côté terminal lance un appel, la station de base de groupe sélectionne un mode d'envoi individuel ou de diffusion groupée pour réaliser une communication sur la base de la politique de sélection de mode de communication. Plus spécifiquement, tant que la charge de la station de base est légère (le résultat de charge courant est inférieur au seuil préréglé), le mode de communication par envoi individuel est sélectionné; tant que la charge de la station de base est lourde (le résultat de charge courant est supérieur au seuil préréglé), le mode de communication par diffusion groupée est sélectionné. La présente invention combine les deux modes de communication, envoi individuel et diffusion groupée, et représente adéquatement les avantages respectifs des deux modes dans un système de communication de groupe. Par utilisation de la présente invention, la qualité de communication est assurée dans la plus grande mesure possible, les ressources du système sont économisées dans le cas d'une forte charge du système, la capacité du système est augmentée, et ainsi la qualité de service est améliorée, et l'expérience utilisateur est assurée.
PCT/CN2011/071494 2010-06-22 2011-03-03 Procédé et système de réalisation de communication de groupe Ceased WO2011160469A1 (fr)

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CN201010215759.3A CN102300168B (zh) 2010-06-22 2010-06-22 一种实现集群通信的方法及系统
CN201010215759.3 2010-06-22

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CN102300168A (zh) 2011-12-28

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