JP2003298496A5 - - Google Patents

Claims (11)

In a single frequency network system having a transmission antenna and a plurality of reception antennas, a repeater capable of spatial multiplexing processing at the reception antenna, and a plurality of user terminals used by the user,
A single frequency characterized by dynamically setting a spatial multiplexing weight pattern to be used by each repeater suitable for the communication before transmitting data from one user terminal to another user terminal. Network system. In a single frequency network system having a transmission antenna and a plurality of reception antennas, a repeater capable of spatial multiplexing processing at the reception antenna, and a plurality of user terminals used by the user,
Before starting communication, means for acquiring information representing the ease of communication between the communication devices of the repeater and the user terminal with other communication devices;
Means for each repeater to notify other communication devices of information on the ease of communication using a dedicated divided time slot;
The central station selected from all the repeaters is used for each relay station so that the communication is correctly performed based on the communication request from the user terminal notified using the dedicated divided time slot. A single frequency network system characterized by notifying spatial multiplexing weight information to be transmitted.   At the time of initial setting, each of the communication devices transmits a known signal all at once, and each communication device receives a known signal from another communication device, and a known signal transmission area for obtaining information on ease of communication, and this A plurality of information sharing areas following the area are provided, and in each information sharing area, a dedicated divided time slot is provided for each communication device to transmit information. 3. The single frequency network system according to claim 2, wherein each repeater shares information on ease of communication.   The said central office is a repeater determined based on the information of the ease of communication between the said repeater predetermined among all the repeaters, or the said communication apparatus. Single frequency network system. The central station determines a relay route of a repeater to be used in mutual communication between a plurality of user terminals based on information indicating ease of communication between each communication device and another communication device. 6. The single frequency network system according to claim 2, further comprising means for holding weight information of spatial multiplexing of each repeater corresponding to the relay path. Based on the communication request from the user terminal, the central station transmits the weight information of the spatial multiplexing of each repeater corresponding to the communication to the repeater, and the repeater that has received this transmission follows the weight information. 3. The single frequency network system according to claim 2, wherein the self- multiplexed weight is set. The central station predetermines in advance spatial multiplexing weight information to be used by each repeater when a transmission request is transferred from each user terminal to the central station and when weight information is notified from the central station to each repeater. 3. The single frequency network system according to claim 2, further comprising means for transmitting to each repeater. Prior to a communication area for communication between user terminals, a communication request area for a user terminal that wants to transmit data to make a communication request to the central station, and a central station that has received this communication request are connected to each repeater. A weight setting area for notifying and setting weight information to be used by each repeater for transmission of the data is provided, and in the communication request area, at least each data terminal can issue a communication request. A divided time slot is provided, and in the weight setting area, a divided time slot dedicated to at least each repeater for notifying weight information corresponding to each repeater is provided, and each divided time slot in the communication request area and the weight setting area is provided. each repeater in each divided time slot in accordance with weight information of the spatial multiplexing as communication can be performed between the communication device and the central station corresponding in Single frequency network system according to claim 2, wherein the body is switched. A repeater used in a single frequency network system,
A plurality of receiving antennas and a plurality of receiving circuits corresponding thereto;
A plurality of weight processing means for performing weighted addition processing of outputs of the plurality of receiving circuits and calculating and storing the weight information;
Selecting means for selecting one of the plurality of weight processing means;
A transmission circuit for transmitting the output of the selected weight processing means;
A transmission antenna connected to the transmission circuit;
Means for receiving and storing information on the ease of mutual communication between other repeaters and data terminal communicators constituting the network;
Prior to the communication area for communication between user terminals, the user terminal that wants to transmit data receives a communication request area for making a communication request to a repeater as a central station, and accepts this communication request. In the weight setting area in which the central station notifies and sets the weight information to be used by the repeater for transmission of the data to other repeaters, the division time provided exclusively for each communication device A repeater comprising a control means for sequentially switching selection of weight processing means for each slot in accordance with predetermined weight information. A first data table storing selection information of weight processing means to be used at least by itself during communication between arbitrary data terminals;
A second information storing at least selection information of weight processing means to be used in a divided time slot assigned to each data terminal when an arbitrary data terminal makes a communication request to the repeater selected as the central station. Data table,
Weight processing means to be used by each repeater in a divided time slot corresponding to each repeater when the central office notifies each repeater of selection information of weight processing means to be used by each repeater during communication between user terminals A third data table storing selection information of
When the control means makes a communication request from a certain data terminal prior to communication from a certain data terminal to the other data terminal, it is specified in the second table at least in the divided time slot assigned to each data terminal. When the central station notifies each repeater of the weight pattern to be used during communication between data terminals, the division time corresponding to at least each repeater is selected. The selection information of the corresponding weight processing means specified in the third table at the time of slot is sequentially selected, and the transmission and reception are performed with reference to the first table during communication from the certain data terminal to another data terminal. 10. The repeater according to claim 9, wherein selection information of weight processing means corresponding to the data terminal is selected. The control means at the time of initial setting,
In addition to transmitting its own known signal, it seeks information on ease of communication when receiving a known signal from another communication device,
Next, information on the ease of communication is transmitted to the other repeater in the dedicated divided time slot assigned to itself, and from the other communication device in the dedicated divided time slot assigned to the other communication device. 11. The information on the ease of communication between all the communication devices is collected by receiving the information on the ease of communication and repeating this transmission and reception. Repeater.