| 摘要 |
User traffic transmitted and received by a mobile station is distributed so as not to be converged on a gateway. The gateway includes a signaling processing device and bearer data processing devices, the signaling processing device is concentrated, and the bearer data processing devices are distributed to networks close to base stations. The signaling processing device recognizes, in response to a connection request from each mobile station, a position of the base station covering the mobile station, allocates the bearer data processing device connected to the network close to the base station, and connects the base station to the allocated bearer data processing devices. |
| 主权项 |
1. A wireless communication system comprising a hierarchical structure such that a plurality of base stations are connected to a gateway through a network, and each of the plurality of base stations communicates with a plurality of wireless terminals, wherein
the gateway includes a signaling processing device for processing signaling, and one or a plurality of bearer data processing devices for processing bearer data, the plurality of base stations, the network, and one or a plurality of the bearer data processing devices are defined as one area, one signaling processing device is concentrated for a plurality of the areas, the signaling processing device includes a position management table indicating which area each of the base stations is located in, and which area the bearer data processing devices are set with respect to the areas in which the respective base stations are located, the signaling processing device allocates the bearer data processing device to the area in which a base station is located in response to a connection request from any one of the wireless terminals, each of the bearer data processing devices has an information table that stores wireless terminal addresses, base station addresses, and capsulation key information necessary for encapsulating and decapsulating in association with each other, each of the bearer data processing devices is located on the basis of the area in which the base stations are located, and communicates the bearer data with one or the plurality of base stations within the area, each of the base stations transmits the connection request including base station identification information to the signaling processing device according to a request from the wireless terminal, upon receiving the connection request, the signaling processing device refers to the position management table, and executes bearer data processing device search processing for specifying a bearer data processing device address of the bearer data processing device connected to the base station on the basis of the base station identification information included in the connection request, the signaling processing device transmits an address to be allocated to the wireless terminal to the base station, the signaling processing device transmits the bearer data processing device address of the bearer data processing device specified by the bearer data processing device search to the base station, the signaling processing device and the bearer data processing device exchange the capsulation key information necessary for encapsulating and decapsulating between the base station and the bearer data processing device, the signaling processing device transmits a setup request including the wireless terminal address, the base station address, and the capsulation key address to the bearer data processing device in which the capsulation key information is specified by the bearer data processing device search, and the bearer data processing device sets the wireless terminal address, the base station address, and the capsulation key information to the information table according to the setup request received from the signaling processing device, and completes a connection of a capsulation path between the base station and the bearer data processing device. |
