Wireless communication system, wireless communication device and wireless communication method, and computer program
First Claim
1. A radio communication system having a multi-cell multi-user structure in which cells where the respective base stations are capable of communicating are adjacently or closely arranged, wherein each base station that has a multi-user detection function determines that a mobile station outside its local cell approaches the boundary with a neighboring cell based on the detection of a transmitted signal from the mobile station for identifying a user, and mixes and synthesizes a signal for a mobile station within the local cell and a signal for the mobile station outside the local cell to output the synthesized signal.
1 Assignment
0 Petitions
Accused Products
Abstract
A radio communication network that requires no connection between base stations, for example, during handoff or when the cell is overloaded, is realized by using a receiver that has a multi-user detection function and a transmitter for synthesizing control information and user data to output the synthesized data. Upon reception of a signal that is transmitted from a mobile station located on the boundary with a neighboring cell, a base station synthesizes user data for a mobile station in its local cell and control information for controlling handoff operation to transmit the synthesized data. In response to this transmission, a mobile station in the neighboring cell separates the control information by multi-user detection to detect the signal and transmits a handoff request to the base station.
58 Citations
17 Claims
-
1. A radio communication system having a multi-cell multi-user structure in which cells where the respective base stations are capable of communicating are adjacently or closely arranged,
wherein each base station that has a multi-user detection function determines that a mobile station outside its local cell approaches the boundary with a neighboring cell based on the detection of a transmitted signal from the mobile station for identifying a user, and mixes and synthesizes a signal for a mobile station within the local cell and a signal for the mobile station outside the local cell to output the synthesized signal.
-
3. A radio communication system having a multi-cell multi-user structure in which cells where the respective base stations are capable of communicating are adjacently or closely arranged,
wherein a mobile station that has a multi-user detection function determines that the mobile station approaches the boundary with a neighboring cell based on the detection of a transmitted signal from a base station outside its local cell for identifying a user, and mixes and synthesizes a signal for the base station within the local cell and a signal for the base station in the neighboring cell to output the synthesized signal.
-
5. A radio communication apparatus operating in a radio communication environment that has a multi-cell multi-user structure in which cells where the respective base stations are capable of communicating are adjacently or closely arranged, the radio communication apparatus comprising:
-
multi-user detection means for detecting a plurality of received signals as desired signals; and
multiple-signal transmission means for mixing and synthesizing a signal for a station within a local cell and a signal for a station outside the local cell in response to the detection of a transmitted signal from the station outside the local cell for identifying a user by the multi-user detection means to output the synthesized signal. - View Dependent Claims (6, 7, 8, 9)
-
-
10. A radio communication method in a radio communication environment that has a multi-cell multi-user structure in which cells where the respective base stations are capable of communicating are adjacently or closely arranged, the radio communication method comprising:
-
a multi-user detection step for detecting a plurality of received signals as desired signals; and
a multiple-signal transmission step for mixing and synthesizing a signal for a station within a local cell and a signal for a station outside the local cell to output the synthesized signal in response to the detection of a transmitted signal from the station outside the local cell for identifying a user in the multi-user detection step. - View Dependent Claims (11, 12, 13, 14)
-
-
15. A radio communication apparatus operating in a radio communication environment having a multi-user structure, the radio communication apparatus comprising:
-
signal generation means for generating a plurality of transmitted signals for a plurality of transmission targets; and
multiplex-synthesis transmission means for mixing and synthesizing the transmitted signals and changing the transmission power of the transmitted signals for every transmission target for output.
-
-
16. A radio communication method in a radio communication environment having a multi-user structure, the radio communication method comprising:
-
a signal generation step for generating a plurality of transmitted signals for a plurality of transmission targets; and
a multiplex-synthesis transmission step for mixing and synthesizing the transmitted signals and changing the transmission power of the transmitted signals for every transmission target for output.
-
-
17. A computer program that is described in a computer-readable form to cause a computer system to execute a process for a radio communication in a radio communication environment having a multi-cell multi-user structure in which cells where the respective base stations are capable of communicating are adjacently or closely arranged, the computer program comprising:
-
a multi-user detection step for detecting a plurality of received signals as desired signals; and
a multiple-signal transmission step for mixing and synthesizing a signal for a station within a local cell and a signal for a station outside the local cell to output the synthesized signal in response to the detection of a transmitted signal from the station outside the local cell for identifying a user in the multi-user detection step.
-
Specification