Method, base station and mobile station for tdd operation in a communication system

A base station configured to support communication in Time Division Duplex (TDD) and Frequency Division Duplex (FDD), the base station comprising:

• a receiver operable for receiving, from a User Equipment (UE), an auxiliary downlink capability message, wherein the auxiliary downlink capability message indicates a capability of the UE to operate in at least one of:
• an auxiliary downlink lower FDD frequency band, an auxiliary downlink upper FDD frequency band;
• and
• a transmitter operable for allocating to the UE a downlink capacity of a frequency band allocated for FDD operation for the UE to receive downlink TDD communication in response to the auxiliary downlink capability message, wherein the transmitter is further operable for:
• transmitting to the UE in TDD mode in the frequency band allocated to the UE:
• operating in both a TDD uplink and a TDD downlink mode in a first frequency band allocated for FDD uplink communication;
• and
• operating in downlink-only mode in a second frequency band allocated for FDD downlink communication.

A mobile station for Time Division Duplex (TDD) operation in a communication system that supports TDD and Frequency Division Duplex (FDD) communications, the mobile station comprising:

• a transmitter operable for transmitting an auxiliary downlink capability message, wherein the auxiliary downlink capability message indicates a capability of the mobile station to operate in at least one of:
• an auxiliary downlink lower FDD frequency band, an auxiliary downlink upper FDD frequency band;
• and
• a receiver operable for receiving an allocation of a downlink capacity of a frequency band allocated for FDD operation to receive downlink TDD communication in response to the auxiliary downlink capability message;
• and
• means for operating in TDD mode in a frequency band allocated for FDD operation wherein the means for operating in TDD mode comprises:
• means for operating in both a TDD uplink and a TDD downlink mode in a first frequency band allocated for FDD uplink communication, and
• means for operating in downlink-only mode in a second frequency band allocated for FDD downlink communication.

A method for Time Division Duplex (TDD) operation in a communication system that is capable of TDD and Frequency Division Duplex (FDD) communication, wherein the system comprises at least a network communicating with a User Equipment (UE), the method comprising at the network:

• receiving from the UE an auxiliary downlink capability message, wherein the auxiliary downlink capability message indicates a capability of the UE to operate in at least one of:
• an auxiliary downlink lower FDD frequency band, an auxiliary downlink upper FDD frequency band;
• transmitting to the UE, in response to the auxiliary downlink capability message, an allocation of downlink capacity of a frequency band allocated for FDD operation to receive downlink TDD communication;
• and
• operating in a TDD mode, wherein operating in TDD mode comprises:
• operating in both a TDD uplink and a TDD downlink mode in a first frequency band allocated for FDD uplink communication, and operating in TDD downlink only mode in a second frequency band allocated for FDD downlink communication.