US 2004/0165547 A1 · Method for providing a communication channel in time division duplexing (tdd) mode between a tdd mobile and a tdd base station

Abstract

The amount of interference to communications in Time Division Duplexing (TDD) mode between a TDD mobile and a TDD base station from a mobile operating in Frequency Division Duplexing (FDD) mode that is located near to the TTD base station can be reduced by changing at least the frequency channel allocated to a particular TDD communications channel, and prefereably also by changing the timeslot allocated to that particular TDD communications channel. Thus instead of allocating particular frequency channels to particular operators for TDD communication, the frequency channels used by any particular operator for TDD communication can change from frame to frame. The timeslots within a frame on a frequency channel may stay the same or may also change. Thus, any particular communications channel (6,8) will not remain on the same frequency channel, nor, possibly, on the same timeslot within a frame, from one frame to the next, so that no one TDD channel will have continuous interference from an FDD channel, but all the TDD communications channels will have the interference shared between them.

Claims20

Dependent claims

A method for providing a communications channel in Time Division Duplexing (TDD) mode between a TDD mobile and a TDD base station, the method comprising the steps of:

designating a plurality of frequency channels available for TDD communications, each frequency channel having a plurality of uplink timeslots and a plurality of downlink timeslots defined within a frame;
designating an uplink channel for a communication session between a TDD mobile and a TDD base station as a series of uplink timeslots, one uplink timeslot being designated for each frame for the duration of the communication session;
designating a downlink channel for a communication session between a TDD mobile and a TDD base station as a series of downlink timeslots, one downlink timeslot being designated for each frame for the duration of the communication session;
the TDD base station determining, at the beginning of a communication session, which uplink and downlink channels are available for use;
and
the TDD base station communicating to the TDD mobile, at the beginning of the communication session, which uplink and downlink channels are allocated for that communication session;
wherein the timeslots forming the uplink and downlink channels are designated to be on different frequencies in different frames.

4 more elements

A method for reducing interference to communications in Time Division Duplexing (TDD) mode between a TDD mobile and a TDD base station, the method comprising the steps of:

designating a plurality of frequency channels available for TDD communications, each frequency channel having a plurality of uplink timeslots and a plurality of downlink timeslots defined within a frame;
designating an uplink channel for a communication session between a TDD mobile and a TDD base station as a series of uplink timeslots, one uplink timeslot being designated for each frame for the duration of the communication session;
designating a downlink channel for a communication session between a TDD mobile and a TDD base station as a series of downlink timeslots, one downlink timeslot being designated for each frame for the duration of the communication session;
the TDD base station determining, at the beginning of a communication session, which uplink and downlink channels are available for use;
and
the TDD base station communicating to the TDD mobile, at the beginning of the communication session, which uplink and downlink channels are allocated for that communication session;
wherein the timeslots forming the uplink and downlink channels are designated to be on different frequency channels in different frames.

4 more elements

Dependencies are inferred from the claim text.

Method for providing a communication channel in time division duplexing (tdd) mode between a tdd mobile and a tdd base station

Life of this patent

Method for providing a communication channel in time division duplexing (tdd) mode between a tdd mobile and a tdd base station

Life of this patent

Abstract

Claims20