Interference management for adaptive TDD with frequency domain separations

Patent metadata

Field	Value
Publication number	US-9584297-B2
Application number	US-201313891143-A
Country	US
Kind code	B2
Filing date	May 9, 2013
Priority date	May 11, 2012
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

A method of wireless communications includes adapting to downlink/uplink resource allocations. In particular, the downlink/uplink communications may be adjusted according to time division duplexed (TDD) configurations of serving and neighbor cells.

First claim

What is claimed is:

1. A method of wireless communication within a carrier aggregation configuration, comprising:
frequency division multiplexing uplink and downlink transmissions within a component carrier from a plurality of component carriers in a time division duplexed (TDD) network, the uplink transmissions and downlink transmissions spatially multiplexed so that the uplink transmissions and downlink transmissions are transmitted on a same carrier and are allocated to different frequency regions of the same carrier, uplink channels allocated to upper edge frequencies and lower edge frequencies of the same carrier, downlink channels allocated to middle frequencies of the same carrier, and a guard band allocated between each uplink channel and downlink channel; and
signaling, from a serving base station to a neighbor base station, to restrict transmissions based on an identified potential interference condition, the transmissions restricted by one of: beamforming the transmissions into a different direction, blocking transmissions on a frequency, or a combination thereof.

2. The method of claim 1 , in which the downlink transmissions do not use at least one symbol of a first set of symbols in a subframe.

3. The method of claim 1 , in which the uplink and downlink transmissions do not use at least one symbol of a first set of symbols in a subframe.

4. An apparatus for wireless communication, comprising:
a memory; and
at least one processor coupled to the memory, the at least one processor configured:
to frequency division multiplex uplink and downlink transmissions within a component carrier from a plurality of component carriers in a time division duplexed (TDD) network, the uplink transmissions and downlink transmissions spatially multiplexed so that the uplink transmissions and downlink transmissions are transmitted on a same carrier and are allocated to different frequency regions of the same carrier, uplink channels allocated to upper edge frequencies and lower edge frequencies of the same carrier, downlink channels allocated to middle frequencies of the same carrier, and a guard band allocated between each uplink channel and downlink channel; and
to signal, from a serving base station to a neighbor base station, to restrict transmissions based on an identified potential interference condition, the transmissions restricted by one of: beamforming the transmissions into a different direction, blocking transmissions on a frequency, or a combination thereof.

5. The apparatus of claim 4 , in which the downlink transmissions do not use at least one symbol of a first set of symbols in a subframe.

6. The apparatus of claim 4 , in which the uplink and downlink transmissions do not use at least one symbol of a first set of symbols in a subframe.

7. A computer program product for wireless communication in a wireless network, comprising:
a non-transitory computer-readable medium having non-transitory program code recorded thereon, the program code comprising:
program code to frequency division multiplex uplink and downlink transmissions within a component carrier from a plurality of component carriers in a time division duplexed (TDD) network, the uplink transmissions and downlink transmissions spatially multiplexed so that the uplink transmissions and downlink transmissions are transmitted on a same carrier and are allocated to different frequency regions of the same carrier, uplink channels allocated to upper edge frequencies and lower edge frequencies of the same carrier, downlink channels allocated to middle frequencies of the same carrier, and a guard band allocated between each uplink channel and downlink channel; and
program code to signal, from a serving base station to a neighbor base station, to restrict transmissions based on an identified potential interference condition, the transmissions restricted by one of: beamforming the transmissions into a different direction, blocking transmissions on a frequency, or a combination thereof.

8. An apparatus for wireless communication, comprising:
means for activating a component carrier;
means for frequency division multiplexing uplink and downlink transmissions within the component carrier from a plurality of component carriers in a time division duplexed (TDD) network, the uplink transmissions and downlink transmissions spatially multiplexed so that the uplink transmissions and downlink transmissions are transmitted on a same carrier and are allocated to different frequency regions of the same carrier, uplink channels allocated to upper edge frequencies and lower edge frequencies of the same carrier, downlink channels allocated to middle frequencies of the same carrier, and a guard band allocated between each uplink channel and downlink channel; and
means for signaling, from a serving base station to a neighbor base station, to restrict transmissions based on an identified potential interference condition, the transmissions restricted by one of: beamforming the transmissions into a different direction, blocking transmissions on a frequency, or a combination thereof.

Assignees

• Qualcomm Inc

Inventors

• Xu Hao
• Chen Wanshi
• Gaal Peter
• Geirhofer Stefan

Classifications

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04W72/541

  using the level of interference · CPC title

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/27

  between access points · CPC title

• H04W72/1268

  of uplink data flows · CPC title