Method and system for a remote downlink transmitter for increasing the capacity and downlink capability of a multiple access interference limited spread-spectrum wireless network

• US 7,061,891 B1
• Filed: 09/17/2001
• Issued: 06/13/2006
• Est. Priority Date: 02/02/2001
• Status: Expired due to Term

• Current Assignee: Leidos, Inc. (Leidos Holdings, Inc.)
• Original Assignee: Science Applications International Corporation
• Inventors: Slocumb, Travis H. III, Kilfoyle, Daniel B., Carson, Steven
• Primary Examiner(s): Ngo, Ricky Q.
• Assistant Examiner(s): NG, CHRISTINE Y
• Application Number:
  US09/953,157
• Time in Patent Office: 1,730 Days
• Field of Search: 370/328, 370/329, 370/331, 370/335, 370/338, 370/342, 370/431, 370/465, 370/401
• US Class Current: 370/335
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels

Abstract

The present invention relates to a system and method for extending the coverage area and communication capacity of a spread-spectrum based wireless network. The system comprises a unique dual-scale, asymmetrical cellular architecture for a wireless network, wherein the communication uplink is based on a macro-cellular system, and the communication downlink is based on a micro-cellular system. Through the user of remote downlink transmitters in the micro-cellular system, the present invention provides a cost effective solution for increasing communication capacity, extending coverage area, and providing high speed communication downlink.

Claims

1. A method for increasing user capacity and high speed data service of wireless communication network comprising the steps of:

receiving at a base station of the network an uplink communication signal from a first user of the network, wherein the uplink communication signal includes a request for data download;

determining whether the uplink communication signal further includes a request for a high-speed data service;

processing the uplink communication signal;

if the uplink communication signal does not include a request for a high-speed data service, providing the requested data download from the base station directly to the first user;

if the uplink communication signal includes a request for a high-speed data service, providing the requested data download from a remote emitter directly to the first user;

determining a first path loss from the first user to the remote emitter;

detecting a second user of the network;

determining a second path loss from the second user to the remote emitter;

if the second path loss is equal to or less than the first path loss, directly providing data download from the remote emitter to the second user; and

if the second path loss is greater than the first path loss, directly providing data download from the base station to the second user.

2. The method of claim 1, wherein the high-speed data service comprises high-speed data download from the network to the first user.

3. The method of claim 1, further comprising:

providing a communication link between the base station and the remote emitter.

4. The method of claim 3, wherein the communication link comprises an out-of-band radio frequency (RF) communication link.

5. The method of claim 3, wherein the communication link comprises a landline connected communication link.

6. The method of claim 3, wherein the communication link comprises an internet protocol (IP) network.

7. The method of claim 3, wherein the communication link comprises an in-band RF link.

8. The method of claim 1, wherein providing the requested data download from the remote emitter directly to the first user comprises:

providing the requested data download from a data network to the first user via a direct communication link between the data network and the remote emitter.

9. A method for a providing a wireless communication network with increased user capacity and enhanced high speed data service, comprising:

providing a base station for serving a designated area of the network;

providing a plurality of remote emitters associated with the network;

detecting a plurality of user equipments (UEs) active in the network;

obtaining a first list of UEs, from the detected UEs, that are active in the designated area;

obtaining a list of one or more remote emitters, from the plurality of remote emitters, that is serving the designated area;

commanding the first-listed UEs to monitor the listed one or more remote emitters;

receiving reports from the detected UEs indicating a path loss between each one of the detected UEs and each one of the base station or remote emitters;

determining whether any of the first-listed UEs desires an enhanced high speed data service; and

if one of the listed UEs desires an enhanced high speed data service, designating the one UE as an enhanced UE and establishing a data link between the enhanced UE and the base station or one of the listed remote emitters with the most favorable path loss to the enhanced UE.

10. The method of claim 9, wherein establishing the data link between the enhanced UE and the base station or one of the listed remote emitter comprises:

identifying one of the listed remote emitter as an optimal remote emitter with the most favorable path loss to the enhanced UE for serving the enhanced UE;

identifying a second list of UEs, from the detected UEs, with the same or more favorable path loss to the optimal remote emitter;

grouping the enhanced UE and the second-listed UEs into an enhanced UE set;

initiating a control channel for UEs of the enhanced UE set from the optimal remote emitter;

commanding the UEs of the enhanced UE set to process the control channel from the optimal remote emitter and be served by the optimal remote emitter;

verifying that the optimal remote emitter is serving the UEs of the enhanced UE set; and

providing downlink data transmission to the UEs of the enhanced UE set directly from the optimal remote emitter.

11. The method of claim 10, wherein commanding the UEs of the enhanced UE set to process the control channel from the optimal remote emitter and be served by the optimal remote emitter comprises:

providing a control channel to the UEs of the enhanced UE set from the base station while concurrently providing the control channel to the UEs of the enhanced UE set from the optimal remote emitter.

12. The method of claim 11, wherein power of the control channel from the base station and power of the control channel from the optimal remote emitter may be independently controlled.

13. The method of claim 11, wherein verifying that the optimal remote emitter is serving the UEs of the enhanced UE set comprises:

receiving verification that the UEs of the enhanced UE set are receiving control channels from both the base station and the optimal remote emitter.

14. The method of claim 10, wherein providing downlink data transmission to the UEs of the enhanced UE set directly from the optimal remote emitter comprises:

initiating a data channel to the UEs of the enhanced UE set from the optimal remote emitter;

suppressing a data channel to the UEs of the enhanced UE set from the base station; and

reviewing the reports received from the detected UEs indicating the path loss between the one of the detected UEs and the each one of the base station or remote emitters.

15. The method of claim 14, further comprising:

removing a UE from the enhanced UE set based on the received reports; and

adding a UE to the enhanced UE set based on the received reports.

16. The method of claim 14, further comprising:

adding a UE to the enhanced UE set based on the received reports.

17. The method of claim 14, further comprising:

removing a UE from the enhanced UE set based on the received reports.

18. The method of claim 17, wherein removing the UE from the enhanced UE set comprises:

deactivating the downlink data transmission from the optimal remote emitter to the removed UE.

19. The method of claim 18, wherein removing the UE from the enhanced UE set further comprises:

activating the downlink data transmission directly from the base station to the removed UE.

20. The method of claim 18, further comprising:

providing another base station for serving another designated area of the network; and

wherein removing the UE from the enhanced UE set further comprises activating the downlink data transmission directly from the another base station to the removed UE.

21. The method of claim 18, further comprising:

identifying another remote emitter, from the plurality of remote emitters associated with the network, that is serving another designated area of the network; and

wherein removing the UE from the enhanced UE set further comprises activating a downlink data transmission directly from the another remote emitter.

22. The method of claim 9, wherein establishing the data link between the enhanced UE and the base station or one of the listed remote emitter comprises:

identifying the base station as optimal with the most favorable path loss to the enhanced UE for serving the enhanced UE; and

providing downlink data transmission to the enhanced UE directly from the base station.

23. The method of claim 9, wherein the received reports from the detected UEs indicating a path loss comprise reports indicating strength of pilot channel signals received by each of the detected UEs from each of the base station and remote emitters.

24. The method of claim 23, wherein the strength of pilot channel signals from the remote emitters are suppressed with respect to the pilot channel signals from the base station.

25. The method of claim 9, further comprising:

initiating a control channel for the enhanced UE from the optimal remote emitter; and

providing downlink data transmission to the enhanced UE directly from the optimal remote emitter.