Method and system for control format detection in heterogeneous cellular networks

Patent metadata

Field	Value
Publication number	US-9742516-B2
Application number	US-201113193023-A
Country	US
Kind code	B2
Filing date	Jul 28, 2011
Priority date	Jul 28, 2011
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A user equipment having a first mechanism to obtain a control region size of a sub-frame of a cell, the user equipment having a processor; and a communications subsystem, wherein the processor and communications subsystem are configured to cooperate to: determine having a first mechanism to obtain a control region size of a sub-frame of the first cell, second cell, or both, whether the user equipment is within an area of the second cell; and utilize, a second mechanism to obtain a control region size of a sub-frame of the second cell while the user equipment is within the area of the second cell.

First claim

The invention claimed is:

1. A user equipment comprising:
a processor; and
a communications subsystem,

wherein the processor and communications subsystem are configured to cooperate to:
receive a control format indicator on a physical control format indicator channel (PCFICH) in a sub-frame;
obtain a control region size indicator from two Physical Hybrid Automatic Repeat Request (HARQ) Indicator Channel (PHICH) resources in the sub-frame, wherein the control region size indicator indicates a control region size of the sub-frame and wherein each PHICH resource contains one bit of information for indicating the control region size, wherein the control region size indicator is obtained by jointly decoding information sent over all PHICH Resource Element Groups; and
determine a control region size of the sub-frame with the control format indicator and the control region size indicator.

2. The user equipment of claim 1 , wherein the control region size indicator has been previously channel coded.

3. A method at a user equipment, comprising:
receiving a control format indicator on a physical control format indicator channel (PCFICH) in a sub-frame;
obtaining a control region size indicator from two Physical Hybrid Automatic Repeat Request (HARQ) Indicator Channel (PHICH) resources in the sub-frame, wherein the control region size indicator indicates a control region size of the sub-frame and wherein each PHICH resource contains one bit of information for indicating the control region size, wherein the control region size indicator is obtained by jointly decoding information sent over all PHICH Resource Element Groups; and
determining a control region size of the sub-frame with the control format indicator and the control region size indicator.

4. The method of claim 3 , wherein the control region size indicator has been previously channel coded.

5. A non-transitory computer-readable storage medium comprising computer-executable instructions for performing operations on a user equipment, the operations for:
receiving a control format indicator on a physical control format indicator channel (PCFICH) in a sub-frame;
obtaining a control region size indicator from two Physical Hybrid Automatic Repeat Request (HARQ) Indicator Channel (PHICH) resources in the sub-frame, wherein the control region size indicator indicates a control region size of the sub-frame and wherein each PHICH resource contains one bit of information for indicating the control region size wherein the control region size indicator is obtained by jointly decoding information sent over all PHICH Resource Element Groups; and
determining a control region size of the sub-frame with the control format indicator and the control region size indicator.

6. The non-transitory computer-readable storage medium of claim 5 , wherein the control region size indicator has been previously channel coded.

Assignees

• Song Yi
• Bontu Chandra Sekhar
• Heo Youn Hyoung
• Blankenship Yufei Wu
• Yu Yi
• Cai Zhijun
• Blackberry Ltd

Inventors

• Song Yi
• Bontu Chandra Sekhar
• Heo Youn Hyoung
• Blankenship Yufei Wu
• Yu Yi
• Cai Zhijun

Classifications

• H04J11/0059 Primary

  Out-of-cell user aspects · CPC title

• H04L5/0073

  Allocation arrangements that take into account other cell interferences · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W16/12

  Fixed resource partitioning · CPC title

• H04W84/045

  using private Base Stations, e.g. femto Base Stations, home Node B · CPC title