OPERATIONAL CONSTRAINTS IN LTE FDD SYSTEMS USING RF AGILE BEAM FORMING TECHNIQUES

• US 20130336179A1
• Filed: 01/31/2013
• Published: 12/19/2013
• Est. Priority Date: 06/13/2012
• Status: Active Grant

• Current Assignee: ALL Purpose Networks LLC
• Original Assignee: ALL Purpose Networks LLC
• Inventors: Rubin, Harvey, Brewington, James Keith, Sawkar, Anil S., Poticny, David M.
• Granted Patent: US 9,031,511 B2
• Time in Patent Office: Days
• US Class Current: 370/281
• CPC Class Codes: G08C 15/00 Arrangements characterised by the use of multiplexing for the transmission of a plurality of signals over a common path
• CPC Class Codes: H01Q 1/00 Details of, or arrangements associated with, antennas arrangements for varying orientation of directional pattern H01Q3/00
• CPC Class Codes: H04B 7/0408 using two or more beams, i.e. beam diversity
• CPC Class Codes: H04J 1/16 Monitoring arrangements for transmission in general H04B17/00; for amplifiers H03F1/52, H03F1/523
• CPC Class Codes: H04J 3/14 Monitoring arrangements for SDH/SONET rings H04J3/085
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04L 1/0028 Formatting
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 12/1407 Policy-and-charging control [PCC] architecture
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 5/0057 Physical resource allocation for CQI
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 36/12 Reselecting a serving backbone network switching or routing node
• CPC Class Codes: H04W 72/046 the resource being in the space domain, e.g. beams

Abstract

Methods and systems having improved capabilities are described for providing communications to a plurality of cellular mobile devices through generating m different sets of fixed position patterns of N RF beams across four contiguous one-millisecond LTE sub-frames from an agile beam forming antenna system of a cellular LTE base transceiver station. The cellular LTE base transceiver station is in RF frequency division duplexing (FDD) communication with the plurality of cellular mobile devices within a cell coverage area of the cellular LTE base transceiver station. Each RF beam illuminates a non-contiguous sub-area of the cell coverage area. A number m sets of RF beam patterns illuminate the area of the cell coverage area, wherein 1≦m≦4.

Claims

1. A system for supporting cellular mobile transceiver device communications, comprising:

a cellular LTE base transceiver station adapted for RF frequency division duplexing communication with a plurality of mobile transceiver devices within a cell coverage area of the cellular LTE base transceiver station, the cellular LTE wireless base transceiver station comprising an agile beam forming antenna system that is adapted to provide full coverage of the cell coverage area by generating a number m different sets of fixed-position patterns of a number N RF beams, each RF beam sized to cover a sub-area of the cell coverage area with the cell coverage area being covered with the number m times the number N RF beam patterns, wherein 1≦

m≦

4, and the antenna system is adapted to generate each of the m sets of N RF beam patterns in a different one-millisecond sub-frame of an LTE frame such that the m sets of N RF beams are generated in a sequence across four contiguous one-millisecond sub-frames.

2. The system of claim 1, wherein the antenna system is adapted to repeat the sequence of generating the m sets of N RF beams.

3. The system of claim 1, wherein 2≦

m≦

4, and the antenna system is adapted to generate each of the N RF beams within each set to illuminate one of the sub-areas of the cell coverage area such that no adjacent sub-areas are illuminated at the same time.

4. The system of claim 1, wherein the cellular LTE base transceiver station is one of a plurality of cellular LTE base transceiver stations in an LTE cellular network.

5. The system of claim 1, wherein the cell coverage area comprises the number m times the number N sub-areas and the antenna system is adapted to illuminate each of the sub-areas at least once in four consecutive one-millisecond sub-frames.

6. The system of claim 1, wherein the number m and the number N are both equal to 4.

7. The system of claim 1, wherein the agile beam forming system is a periodic beam forming system.

8. A method, comprising:

generating a number m different sets of fixed position patterns of a number N RF beams across a number of contiguous LTE sub-frames with an agile beam forming antenna system of a cellular LTE base transceiver station, wherein the cellular LTE base transceiver station is in RF frequency-division duplexing communication with a plurality of mobile transceiver devices within a cell coverage area of the cellular LTE base transceiver station, each RF beam is sized to cover a sub-area of the cell coverage area, the number m times the number N RF beam patterns cover the cell coverage area, and 1≦

m≦

4.

9. The method of claim 8, wherein each of the LTE sub-frames is a one-millisecond sub-frame.

10. The method of claim 9, wherein the number of the LTE sub-frames is four.

11. The method of claim 8, wherein the number m sets of the number N RF beams are generated in a repeated sequence across contiguous sets of four contiguous one-millisecond LTE sub-frames.

12. The method of claim 8, wherein 2≦

m≦

4, and each of the number N RF beams illuminates one of the sub-areas of the cell coverage area such that no adjacent sub-areas are illuminated at the same time.

13. The method of claim 8, wherein the cellular LTE base transceiver station is one of a plurality of cellular LTE base transceiver stations in an LTE cellular network.

14. The method of claim 9, wherein the cell coverage area comprises the number m times the number N sub-areas and each of the sub-areas is illuminated by one of the RF beams at least once in four consecutive one-millisecond sub-frames.

15. The method of claim 8, wherein the number m and the number N are both equal to 4.

16. The method of claim 8, wherein the agile beam forming system is a periodic beam forming system.