METHOD AND SYSTEM FOR MANAGING COMMUNICATION IN A FREQUENCY DIVISION MULTIPLE ACCESS (FDMA) COMMUNICATION NETWORK

• US 20070297363A1
• Filed: 05/29/2007
• Published: 12/27/2007
• Est. Priority Date: 05/26/2006
• Status: Active Grant

• Current Assignee: WiChorus, Inc. (Infinera Corp.)
• Original Assignee: WiChorus, Inc. (Infinera Corp.)
• Inventors: Jalil, Rehan, Ergen, Mustafa
• Granted Patent: US 8,494,450 B2
• Time in Patent Office: Days
• US Class Current: 370/330
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 72/1263 Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
• CPC Class Codes: H04W 92/10 between terminal device and access point, i.e. wireless air interface

Abstract

The present invention provides method and system for managing communication in a Frequency Division Multiple Access (FDMA) communication network. The method comprises reserving a first segment downlink time slot and/or a first segment uplink time slot for a first segment in the FDMA communication network. The first segment belongs to a plurality of segments used in the FDMA communication network. Thereafter, a communication is scheduled between a base station and one or more mobile stations based on the first segment downlink time slot and/or the first segment uplink time slot. The base station uses the first segment at a high power level for the communication. Further, the one or more mobile stations can be scheduled for an uplink transmission, based on a location of the one or more mobile stations. A mobile station can be located in one of a plurality of sectors of a cell area of a base station.

Claims

1. A method for managing communication in a Frequency Division Multiple Access (FDMA) communication network, the method comprising:

reserving at least one of a first segment downlink time slot and a first segment uplink time slot for a first segment. In the FDMA communication network, the first segment belonging to a plurality of segments used in the FDMA communication network; and

scheduling a communication between a base station and at least one mobile station based on the at least one of the first segment downlink time slot and the first segment uplink time slot, the base station using the first segment at a high power level for the communication, the at least one mobile station located in one of a first area and a second area, wherein the first area is a part of a cell area of the base station where overlapping with at least one neighboring cell area of at least one neighboring base station is absent, and the second area is a part of the cell area of the base station where overlapping with the at least one neighboring cell area of the at least one neighboring base station is present.

2. The method of claim 1, wherein at least one of a ranging information and a signal strength information from the base station is used to determined if the at least one mobile station is located in one of a first area and a second area.

3. The method of claim 1, wherein in the first segment downlink time slot and in the first segment uplink time slot, the base station communicates with the at least one mobile station using the first segment, the mobile station belonging to one of the first area and the second area of the base station.

4. The method of claim 1, wherein in the first segment downlink time slot:

facilitating a communication between the at least one neighboring base station and a first plurality of mobile stations using the first segment in the first segment downlink time slot, the first plurality of mobile stations located in a first area of the at least one neighboring base station, wherein the at least one neighboring base station uses the first segment at a low power level.

5. The method of claim 1, wherein the cell area is partitioned into a first plurality of sectors and the at least one neighboring cell area is partitioned in to a second plurality of sectors.

6. The method of claim 5, wherein in the first segment uplink time slot, performing one of:

switching off a communication based on the first segment in one or more first predetermined sectors of the at least one neighboring cell area, the one or more first predetermined sectors belonging to the second plurality of sectors, wherein an overlapping is present between at lest one of the one or more first predetermined sectors and at least one of the first plurality of sectors; and

establishing communication using the first segment at a low power level in the one or more first predetermined sectors of the at least one neighboring cell area.

7. The method of claim 6 further comprises:

facilitating a communication between a second plurality of mobile stations and the at least one neighboring base station using the first segment in the first segment uplink time slot, the first segment being used at a predetermined power level, wherein the second plurality of mobile stations are located in one or more second predetermined sectors of the second plurality of sectors, wherein an overlapping is absent between the one or more second predetermined sectors and each of the first plurality of sectors.

8. The method of claim 7, wherein the predetermined power level is one of a low power level and a high power level.

9. The method of claim 1, wherein the reserving step further comprises reserving a low power level downlink time slot and a low power level uplink time slot, wherein each of the plurality of segments in the FDMA communication network is used at a low power level.

10. The method of claim 1, wherein the reserving step further comprises reserving a high power level downlink time slot, wherein each of the plurality of segments in the FDMA communication network is used at a high power level, the high power downlink time slot corresponding to Multicast and Broadcast Service (MBS) symbol.

11. The method of claim 1, wherein the FDMA communication network is a Orthogonal FDMA (OFDMA) communication network.

12. A method for managing an uplink transmission in a Frequency Division Multiple Access (FDMA) communication network, the method comprising:

establishing an uplink transmission between at least one mobile station and a base station based on a first segment, the first segment belonging to a plurality of segments in the FDMA communication network, the at least one mobile station located in a cell area of the base station, the cell area being divided into a first plurality of sectors;

switching off an uplink transmission based on the first segment in one or more first predetermined sectors belonging to a second plurality of sectors, the second plurality of sectors corresponding to at least one neighboring cell area of at least one neighboring base station, wherein an overlapping is present between at least one of the one or more first predetermined sectors and at least one of the first plurality of sectors; and

establishing the uplink transmission in one or more second predetermined sectors using the first segment at a predetermined power level, the one or more second predetermined sectors belonging to the second plurality of sectors, wherein an overlapping is absent between the one or more second predetermined sectors and each of the first plurality of sectors.

13. A system for managing communication in a Frequency Division Multiple Access (FDMA) communication network, the method comprising:

a reserving module, the reserving module configured for reserving at least one of a first segment downlink time slot and a first segment uplink time slot for a first segment in the FDMA communication network, the first segment belonging to a plurality of segments used in the FDMA communication network; and

a scheduling module, the scheduling module configured for scheduling a communication between a base station and at least one mobile station based on the at least one of the first segment downlink time slot and the first segment uplink time slot, the base station using the first segment at a high power level for the communication, the at least one mobile station located in one of a first area and a second area, wherein the first area is a part of a cell area of the base station where overlapping with at least one neighboring cell area of at least one neighboring base station is absent, and the second area is a part of the cell area of the base station where overlapping with the at least one neighboring cell area of the at least one neighboring base station is present.

14. The system of claim 13, wherein the reserving module is further configured for reserving a low power level downlink time slot and a low power level uplink time slot, wherein each of the plurality of segments in the FDMA communication network is used at a low power level.

15. The system of claim 13, wherein the reserving module is further configured for reserving a high power level downlink time slot, wherein each of the plurality of segments in the FDMA communication network is used at a high power level, the high power downlink time slot corresponding to a MBS symbol.

16. the system of claim 13, wherein the base station comprises a first plurality of antennas and the at least one neighboring base station comprises a second plurality of antennas, the first plurality of antennas and the second plurality of antennas operatively coupled to the scheduling module, the first plurality of antennas servicing a first plurality of sectors belonging to the cell area of the base station, and the second plurality of antennas servicing a second plurality of sectors belonging to the at least one cell area of the at least one neighboring base station.

17. The system of claim 16, wherein the scheduling module is further configured for:

facilitating the first plurality of antennas to service the first plurality of sectors using the first segment at a high power level, in the first segment downlink time slot and in the first segment uplink time slot;

facilitating the second plurality of antennas to service the second plurality of sectors using the first segment at a low power level, in the first segment downlink time slot; and

enabling the second plurality of antenna to perform one of;

switching off communication based on the first segment in one or more first predetermined sectors in the first segment uplink time slot, the one or more first predetermined sectors belonging to the second plurality of sectors, wherein an overlapping is present between at least one of the one or more first predetermined sectors and at least one of the first plurality of sectors; and

establishing communication using the first segment at a low power level in the one or more first predetermined sectors in the first segment uplink time slot.

18. The system of claim 17, wherein in scheduling module is further configured for:

allowing the second plurality of antennas to service one or more second predetermined sectors of the second plurality of sectors in the first segment uplink time slot, the first segment being used at a predetermined power level, wherein an overlapping is absent between the one or more second predetermined sectors and each of the first plurality of sectors.