Control signaling in a beamforming system

• US 9,698,884 B2
• Filed: 05/28/2015
• Issued: 07/04/2017
• Est. Priority Date: 09/24/2014
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Yu, Chia-Hao, Guey, Jiann-Ching, Chang, Ming-Po
• Primary Examiner(s): Williams, Jenee
• Application Number:
  US14/723,689
• Publication Number:
  US 20160087704A1
• Time in Patent Office: 768 Days
• Field of Search: None
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

A method of control signaling in a beamforming system is proposed. A base station allocates a first sets of DL control resource blocks for DL transmission to a plurality of user equipments (UEs) in a beamforming network. Each set of DL control resource blocks is associated with a corresponding set of beamforming weights. The base station also allocates a second sets of UL control resource blocks for UL transmission from the UEs. Each set of UL control resource blocks is associated with the same corresponding set of beamforming weights. The base station transmits cell and beam identification information using a set of control beams. Each control beam comprises a set of DL control resource block, a set of UL control resource block, and the corresponding set of beamforming weights.

Claims

1. A method comprising:

allocating first sets of downlink (DL) control resource blocks by a base station for DL transmission to a plurality of user equipments (UEs) in a beamforming mobile communication network, wherein each set of the DL control resource blocks is associated with a corresponding set of beamforming weights;

allocating second sets of uplink (UL) control resource blocks by the base station for UL transmission from the UEs, wherein each set of the UL control resource blocks is associated with the corresponding set of beamforming weights; and

transmitting cell and beam identification information using sets of control beams, wherein each control beam comprises a set of the DL control resource blocks, a set of the UL control resource blocks, and the corresponding set of beamforming weights.

2. The method of claim 1, wherein a collection of the corresponding set of beamforming weights create a radiation pattern that covers an entire service area of a cell.

3. The method of claim 2, wherein the base station allocates the sets of control beams to cover the entire service area of the cell.

4. The method of claim 1, wherein the first sets of DL control resource blocks and the associated sets of beamforming weights form a DL control region, and wherein the second sets of UL control resource blocks and the associated sets of beamforming weights form an UL control region.

5. The method of claim 4, wherein the DL control region is divided into DL control region segments in time domain, and where the UL control region is divided into UL control region segments in time domain.

6. The method of claim 5, wherein a control cycle includes one DL control region segment and one corresponding UL control region segment, and wherein the DL and UL control region segments are repeatedly configured for each control cycle along time domain.

7. The method of claim 5, wherein the DL control resource blocks for different control beams in a DL control region segment are Time Division Multiplexed (TDM) and contiguous in time domain.

8. The method of claim 5, wherein the DL control resource blocks for different control beams in a DL control region segment are Time Division Multiplexed (TDM) and interleaved with the UL control resource blocks in time domain.

9. The method of claim 5, wherein the UL control resource blocks for different control beams in an UL control region segment are Spatial Division Multiplexed (SDM).

10. The method of claim 5, wherein the DL control resource blocks and the UL control resource blocks have different duty cycle.

11. The method of claim 5, wherein the control resource blocks for different control beams in a control cycle occupies time-frequency resource blocks based on at least one of Time Division Multiplexing, Frequency Division Multiplexing, Code Division Multiplexing, and Spatial Division Multiplexing.

12. The method of claim 5, wherein the control cycle for different cells are aligned in time domain.

13. The method of claim 5, wherein the DL control region and the UL control region are interleaved along time domain in Time Division Duplex (TDD) systems.

14. The method of claim 5, wherein the DL control region and the UL control region are overlapped along time domain in Frequency Division Duplex (FDD) systems.

15. The method of claim 1, wherein the DL control resource blocks comprises a pilot part and a data part, and wherein the pilot part is used for transmitting the cell and beam identification information.

16. A base station, comprising:

a downlink resource allocation circuit that allocates first sets of downlink (DL) control resource for DL transmission to a plurality of user equipments (UEs) in a beamforming mobile communication network, wherein each set of the DL control resource blocks is associated with a corresponding set of beamforming weights;

an uplink resource allocation circuit that allocates second sets of uplink (UL) control resource blocks for UL transmission from the UEs, wherein each set of the UL control resource blocks is associated with the corresponding set of beamforming weights; and

a radio frequency (RF) transmitter that transmits cell identification and beam identification information using sets of control beams, wherein each control beam comprises a set of the DL control resource blocks, a set of the UL control resource blocks, and the corresponding set of beamforming weights.

17. The base station of claim 16, wherein a collection of the corresponding beamforming weights create a radiation pattern that covers an entire service area of a cell.

18. The base station of claim 17, wherein the base station allocates the sets of control beams to cover the entire service area of the cell.

19. The base station of claim 16, wherein the first sets of DL control resource blocks and the associated sets of beamforming weights form a DL control region, and wherein the second sets of UL control resource blocks and the associated sets of beamforming weights form an UL control region.

20. The base station of claim 19, wherein the DL control region is divided into DL control region segments in time domain, and where the UL control region is divided into UL control region segments in time domain.

21. The base station of claim 20, wherein a control cycle includes one DL control region segment and one corresponding UL control region segment, and wherein the DL and UL control region segments are repeatedly configured for each control cycle along time domain.