JP2003289576A5

JP2003289576A5 -

Info

Publication number: JP2003289576A5
Application number: JP2002091362A
Authority: JP
Filing date: 2002-03-28
Publication date: 2005-09-02
Anticipated expiration: 2022-03-28

Claims

In a wireless communication system in which a mobile wireless communication device and a fixed wireless communication device communicate with each other wirelessly by the TDD method,
The fixed wireless communication device wirelessly communicates with each of the first and second mobile wireless communication devices using the period of the first TDD,
When the first mobile radio communication device receives interference in communication with the fixed radio communication device, the fixed radio communication device transmits a period of the first TDD to the first mobile radio communication device. Set a second TDD period different from
Wireless communication with the first wireless communication apparatus is performed using the set period of the second TDD, and mutual communication with the second wireless communication apparatus is performed using the period of the first TDD. A wireless communication system characterized by wireless communication.

In the mobile wireless communication device that performs wireless communication with the fixed wireless communication device by the TDD method,
Communication means for wirelessly communicating with the fixed wireless communication device using the period of the first TDD;
Detecting means for detecting that the communication by the communication means has received interference;
When the detection unit detects that the communication by the communication unit is interfered with, generation of request information for requesting a TDD cycle to be used that is different from the cycle of the first TDD Means and
The communication unit transmits the request information generated by the generation unit to the fixed wireless communication device, and the first TDD set by the fixed wireless communication device based on the transmitted request information. A mobile radio communication apparatus, wherein a radio communication with the fixed radio communication apparatus is performed mutually using a second TDD period different from the period of.

The period of the first TDD is a period corresponding to a predetermined frame including a downlink period in which information is transmitted in the downlink direction and an uplink period in which information is transmitted in the uplink direction. The mobile radio communication apparatus according to claim 2.

The mobile radio communication apparatus according to claim 3, wherein the period of the second TDD is a period corresponding to a frame group composed of a plurality of consecutive frames.

The communication means transmits information in a downlink direction in a first frame of the plurality of frames constituting the frame group, transmits information in an uplink direction in a second frame, and transmits a third frame. The mobile radio communication apparatus according to claim 4, wherein no information is transmitted.

The mobile radio communication apparatus according to claim 5, further comprising search means for searching for the presence of another fixed radio communication apparatus different from the fixed radio communication apparatus in the third frame.

When the frame group includes four or more frames, a predetermined one of the frame groups is the second frame, and a predetermined one different from the second frame is the third frame. 6. The mobile radio communication apparatus according to claim 5, wherein each of the remaining frames other than the second frame and the third frame is a first frame.

The mobile radio communication according to claim 5, wherein the first to the third frames are assigned to each of the plurality of frames constituting the frame group in a predetermined order set in advance. apparatus.

The mobile radio communication apparatus according to claim 5, wherein the detection unit detects that the interference is received based on an error rate in the downlink period.

The mobile radio communication according to claim 5, wherein the detection means detects that the interference is received when a signal transmitted by another mobile radio communication apparatus is received by the communication means. apparatus.

The detection means detects that the interference is received when a signal transmitted from another fixed wireless communication apparatus different from the fixed wireless communication apparatus is received by the communication means. Item 6. The mobile radio communication device according to Item 5.

If it is detected that the detection means is receiving interference, further comprising an opening means for opening a communication line for the other fixed wireless communication device or other mobile wireless communication device of the interference source,
The communication means continues wireless communication with the fixed wireless communication apparatus and wirelessly communicates with the other fixed wireless communication apparatus or the other mobile wireless communication apparatus using the communication line established by the establishment means. The mobile radio communication apparatus according to claim 5, wherein communication is started.

Monitoring means for monitoring a period in which the interference occurs in the downlink period;
An estimation means for estimating whether or not the period of the second TDD has already been used by another mobile radio communication device based on the period of occurrence of the interference monitored by the monitoring means;
When the estimation unit estimates that the second TDD period has already been used by the other mobile radio communication device, the generation unit further selects a frame in which the interference occurs as the second TDD. 10. The mobile radio communication apparatus according to claim 9, further comprising: generating designation information that designates one of the third frames, and including the generated designation information in the request information. .

The generation unit specifies the third frame when the timing at which the communication unit receives the interference is the first half of the downlink period,
The mobile radio communication apparatus according to claim 13, wherein the second frame is designated when the timing at which the communication means receives the interference is the second half of the downlink period.

When it is detected by the detection means that the interference is received, the other mobile radio communication apparatus that has caused interference is negotiated with the communication means, and based on the result of the negotiation, the period of the TDD to be used from now on And a determining means for determining a period of the second TDD different from the period of the first TDD,
The mobile radio according to claim 2, wherein the generation unit generates the request information that requests the second TDD cycle determined by the determination unit as the TDD cycle to be used from now on. Communication device.

When the other mobile wireless communication device is wirelessly communicating with the same fixed wireless communication device as the fixed wireless communication device with which the communication means is communicating, the determining means determines the period of the second TDD. Prohibited to decide,
The mobile radio communication apparatus according to claim 15, wherein the communication unit performs radio communication with the fixed radio communication apparatus by continuously using the period of the first TDD.

The period of the first TDD is a period corresponding to a predetermined frame;
The mobile radio communication apparatus according to claim 15, wherein the period of the second TDD is a period corresponding to a frame group composed of a predetermined number of consecutive frames.

The mobile radio communication apparatus according to claim 17, wherein the communication unit does not transmit information in a predetermined frame among the frames constituting the frame group.

In the wireless communication method of the mobile wireless communication device that wirelessly communicates with the fixed wireless communication device by the TDD method,
A first communication control step for controlling wireless communication performed with the fixed wireless communication device using a period of the first TDD;
A detecting step of detecting that the communication with the fixed wireless communication device receives interference;
When it is detected that the communication with the fixed wireless communication apparatus is interfered by the processing of the detection step, a request for requesting a period of TDD to be used from now that is different from the period of the first TDD A generation step for generating information;
A second communication control step for controlling transmission of the request information generated by the processing of the generation step to the fixed wireless communication device;
Utilizing a second TDD cycle different from the first TDD cycle set for the request information whose transmission is controlled by the fixed wireless communication apparatus by the processing of the second communication control step And a third wireless communication control step of controlling wireless communication performed mutually with the fixed wireless communication device.

A computer that controls a mobile wireless communication device that performs wireless communication with a fixed wireless communication device using the TDD method
A first communication control step for controlling wireless communication performed with the fixed wireless communication device using a period of the first TDD;
A detection step of detecting that communication with the fixed wireless communication device is receiving interference;
When it is detected that the communication with the fixed wireless communication apparatus is interfered by the processing of the detection step, a request for requesting a period of TDD to be used from now that is different from the period of the first TDD A generation step for generating information;
A second communication control step for controlling transmission of the request information generated by the processing of the generation step to the fixed wireless communication device;
Utilizing a second TDD cycle different from the first TDD cycle set for the request information whose transmission is controlled by the fixed wireless communication apparatus by the processing of the second communication control step And a third wireless communication control step for controlling wireless communication performed mutually with the fixed wireless communication device.

In the fixed wireless communication device that wirelessly communicates with the mobile wireless communication device by the TDD method,
Communication means for wirelessly communicating with each of the first and second mobile wireless communication devices using the period of the first TDD;
When the communication means receives from the first mobile radio communication apparatus request information requesting a TDD period to be used that is different from the first TDD period, the first mobile Setting means for setting a second TDD cycle different from the first TDD cycle for communication with a wireless communication device;
The communication means wirelessly communicates with the first mobile radio communication device using the second TDD period set by the setting means, and uses the first TDD period. A fixed wireless communication apparatus, wherein the fixed wireless communication apparatus performs wireless communication with the second wireless communication apparatus.

In the wireless communication method of the fixed wireless communication device that wirelessly communicates with the mobile wireless communication device by the TDD method,
A first communication control step for controlling wireless communication performed with each of the first and second mobile wireless communication devices using the period of the first TDD;
When request information is received from the first mobile radio communication apparatus that requests a TDD period to be used that is different from the first TDD period, the first mobile radio communication apparatus communicates with the first mobile radio communication apparatus. A setting step for setting a second TDD period different from the first TDD period for communication;
Controlling wireless communication performed with the first mobile radio communication device using the second TDD period set by the setting step, and using the first TDD period And a second communication control step for controlling wireless communication performed mutually with the second wireless communication device.

A computer that controls a fixed wireless communication device that wirelessly communicates with a mobile wireless communication device using the TDD method.
A first communication control step of controlling wireless communication performed with each of the first and second mobile wireless communication devices using the period of the first TDD;
When request information is received from the first mobile radio communication apparatus that requests a TDD period to be used that is different from the first TDD period, the first mobile radio communication apparatus communicates with the first mobile radio communication apparatus. A setting step for setting a second TDD period different from the first TDD period for communication;
Controlling wireless communication performed with the first mobile radio communication device using the second TDD period set by the setting step, and using the first TDD period And a second communication control step for controlling wireless communication performed mutually with the second wireless communication device.