Simultaneous transmission on shared channel

• US 9,998,246 B2
• Filed: 03/13/2015
• Issued: 06/12/2018
• Est. Priority Date: 03/13/2014
• Status: Active Grant

• Current Assignee: Mimosa Networks, Inc. (Airspan Networks Inc.)
• Original Assignee: Mimosa Networks, Inc. (Airspan Networks Inc.)
• Inventors: Hinman, Brian, Fink, Jaime
• Primary Examiner(s): Grey, Christopher
• Application Number:
  US14/657,942
• Publication Number:
  US 20150263816A1
• Time in Patent Office: 1,187 Days
• CPC Class Codes: H01Q 1/40 Radiating elements coated with or embedded in protective material
• CPC Class Codes: H01Q 17/00 Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
• CPC Class Codes: H01Q 19/19 comprising one main concave reflecting surface associated with an auxiliary reflecting surface
• CPC Class Codes: H04J 3/0676 Mutual
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling

Abstract

Simultaneous transmission on a shared channel by a plurality of collocated radios is provided herein. The two or more radios are collocated with one another and are communicating with two far radios over a pair of long range wireless links. The two or more radios are configured to transmit and receive in synchronization with one another on a same channel. An off-axis response for each of the two or more radios is reduced compared to their on-axis response for improved signal to noise ratio, and the on-axis response the two or more radios are substantially equal to one another.

Claims

1. A system, comprising two or more radios collocated with one another, the two or more radios communicating with two far radios over a pair of long range wireless links, the two or more radios being configured to transmit and receive in synchronization with one another on a same channel, wherein an off-axis response for each of the two or more radios is reduced compared to their on-axis response for improved signal to noise ratio, further wherein the on-axis response the two or more radios are substantially equal to one another, wherein the on-axis response for a radio occurs along a main axis between the two or more radios and the two far radios, and the off-axis response occurs when interference is experienced based on overlapping signals generated between any of the two or more radios and the two far radios, further wherein any of transmit and receive antenna gains of the two or more radios are selectively adjusted to compensate for disparate signal strengths in their on-axis responses.

2. The system according to claim 1, wherein the two or more radios are time division duplex radios.

3. The system according to claim 1, wherein the off-axis response compared with the on-axis response is within a signal to noise ratio of approximately 6 dBm.

4. The system according to claim 1, wherein the two or more radios are synchronized by GPS modules in each of the two or more radios.

5. The system according to claim 1, wherein one of the two or more radios comprises a GPS module and the one radio is coupled to the other of the two or more radios with a wired link to share GPS information allowing the two or more radios to synchronize.

6. The system according to claim 1, wherein each of the two or more radios comprises a shroud that provides side lobe rejection to prevent signal overlap there between.

7. The system according to claim 1, wherein each of the two or more radios are synchronized over a network.

8. The system according to claim 1, wherein the on-axis response of each of the two or more radios is selectively adjusted by adjusting an antenna gain of the each of the two or more radios.

9. The system according to claim 1, wherein an antenna gain of each of the two far radios is selectively adjustable to allow the on-axis response of each of the two or more radios to be substantially equal to one another.

10. The system according to claim 1, wherein the on-axis responses of the two or more radios are spaced apart from one another to reduce the off-axis response of each of the two or more radios.

11. The system according to claim 1, further comprising a cloud controller in communication with each of the two or more radios, the cloud controller being configured to balance the on-axis response of the two or more radios relative to one another.

12. The system according to claim 11, wherein the cloud controller is further configured to detect additional radios in proximity to the two or more radios, the additional radios producing interference relative to the two or more radios.

13. A method, comprising:

transmitting signals on a same channel by two or more collocated radios by;

synchronizing transmit and receive time periods of the two or more collocated radios such that the two or more collocated radios transmit at a same time and receive at a same time as one another;

reducing an off-axis response for each of the two or more collocated radios relative to their on-axis response, wherein the on-axis response for a radio occurs along a main axis between the two or more collocated radios and two far radios, and the off-axis response occurs when interference is experienced based on overlapping signals generated between any of the two or more collocated radios and the two far radios; and

balancing the on-axis response for each of the two or more collocated radios such that they are substantially equivalent to one another.

14. The method according to claim 13, wherein reducing an off-axis response for each of the two or more collocated radios relative to their on-axis response comprises optimizing angular separation between the two or more collocated radios.

15. The method according to claim 13, further comprising detecting interference between the two or more collocated radios prior to synchronizing the two or more collocated radios.

16. The method according to claim 13, wherein the two or more collocated radios are each owned by different entities.

20. The method according to claim 13, further comprising receiving GPS information in order to synchronize the transmit and receive time periods.

17. A method of communication synchronization between two or more radios, the two or more radios having angular separation or physical characteristics that optimize their on-axis responses, the method comprising:

selecting a shared channel for the two or more radios;

synchronizing transmit and receive time periods of the two or more radios such that the two or more radios transmit at a same time and receive at a same time as one another on the shared channel; and

balancing the on-axis response for each of the two or more radios such that they are substantially equivalent to one another, wherein the on-axis response for a radio occurs along a main axis between the two or more radios and two far radios, and an off-axis response occurs when interference is experienced based on overlapping signals generated between any of the two or more radios and the two far radios.

18. The method according to claim 17, wherein the physical characteristics comprise radio shrouds with side lobe rejection.

19. The method according to claim 17, wherein the synchronizing transmit and receive time periods comprises:

receiving at one of the two or more radios, GPS information; and

providing the GPS information to the other of the two or more radios over a wired link or a network connection, wherein the GPS information is used to synchronize the two or more radios.