METHOD AND APPARATUS FOR IMPLEMENTING A BLANKET WIRELESS LOCAL AREA NETWORK CONTROL PLANE

• US 20110188484A1
• Filed: 09/13/2010
• Published: 08/04/2011
• Est. Priority Date: 09/18/2009
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Dai, Yuying, Reznik, Alexander, Kaur, Samian, Tomici, John L., Benveniste, Mathilde, Ye, Chunxuan
• Granted Patent: US 8,767,588 B2
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 36/0061 of neighbour cell information
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A method and apparatus for maintaining a connection between a wireless transmit/receive unit (WTRU) and a blanket wireless local area network (BWLAN) are described. An inter-working function (IWF) entity in a given network access point (NAP) of the BWLAN maintains lists of WTRUs in respective states. Furthermore, the given NAP maintains a list of neighbor NAPs, and operates in accordance with a selected WTRU mobility protocol. The states may include a “not aware” (NA) state in which the given NAP is actually not aware of a particular WTRU, an “active transmit” (AT) state in which the given NAP is actively transmitting to a particular WTRU, and a “neighbor range” (NR) state for WTRUs indicated in an update report from neighbor (URN) message that the given NAP was not aware of. The WTRU mobility protocol may be a push mobility protocol or a poll mobility protocol.

Claims

1. A method, performed by a given network access point (NAP) in a blanket wireless local area network (BWLAN), of providing mobility and cellularization functionality, the method comprising:

an inter-working function (IWF) entity in the given NAP maintaining lists of wireless transmit/receive units (WTRUs) in respective states;

the given NAP maintaining a list of neighbor NAPs; and

the given NAP operating in accordance with a selected WTRU mobility protocol.

2. The method of claim 1 wherein the states include a “

not aware”

(NA) state in which the given NAP is actually not aware of a particular WTRU.

3. The method of claim 1 wherein the states include an “

active transmit”

(AT) state in which the given NAP is actively transmitting to a particular WTRU.

4. The method of claim 1 further comprising:

the given NAP receiving an update report from neighbor (URN) message indicating particular WTRUs that a NAP transmitting the message is aware of.

5. The method of claim 4 wherein the states include a “

neighbor range”

(NR) state for WTRUs indicated in the URN message that the given NAP was not aware of.

6. The method of claim 1 wherein the WTRU mobility protocol is a poll mobility protocol that enables the IWF entity to use a neighborhood network access control (NAC) entity in the given NAP to poll the NAPs on its neighbor list in response to receiving at least one data burst from a WTRU.

7. The method of claim 6 wherein a medium access control (MAC) entity in the given NAP extracts source and destination MAC addresses from the at least one data burst, and forwards the MAC addresses to the IWF entity.

8. The method of claim 7 further comprising:

the IFW entity providing the MAC entity with a list of active source and destination MAC addresses for both transmission and reception.

9. The method of claim 7 wherein the MAC entity processes data bursts for transmission on a condition that the source and destination MAC addresses are in an active transmission list.

10. The method of claim 7 wherein the MAC entity forwards a payload of the received data burst to the IFW entity on a condition that the source and destination MAC addresses are in an active reception list.

11. The method of claim 1 wherein the WTRU mobility protocol is a push mobility protocol.

12. The method of claim 11 further comprising:

each particular NAP informing its neighbor NAPs of the WTRUs which the particular NAP is aware of;

each particular NAP transmitting an update report from neighbor (URN) message; and

each NAP that receives a URN comparing a list of WTRUs in the URN message against the WTRUs the NAP is aware of.

13. A blanket wireless local area network (BWLAN) network access point (NAP) for providing mobility and cellularization functionality, the BWLAN NAP comprising:

an inter-working function (IWF) entity configured to maintain lists of wireless transmit/receive units (WTRUs) in respective states;

a neighborhood access control (NAC) entity configured to maintain a list of neighbor NAPs; and

a medium access control (MAC) entity configured to extract source and destination MAC addresses from at least one received data burst, and forward the MAC addresses to the IWF entity, wherein the BWLAN NAP operates in accordance with a selected WTRU mobility protocol.

14. The BWLAN NAP of claim 13 wherein the states include a “

not aware”

(NA) state in which the BWLAN NAP is actually not aware of a particular WTRU.

15. The BWLAN NAP of claim 13 where in the states include an “

active transmit”

(AT) state in which the given NAP is actively transmitting to a particular WTRU.

16. The BWLAN NAP of claim 13 wherein the IWF entity is configured to receive an update report from neighbor (URN) message indicating particular WTRUs that a NAP transmitting the message is aware of.

17. The BWLAN NAP of claim 16 wherein the states include a “

neighbor range”

(NR) state for WTRUs indicated in the URN message that the BWLAN NAP was not aware of.

18. The BWLAN NAP of claim 13 wherein the WTRU mobility protocol is a poll mobility protocol that enables the IWF entity to use the neighborhood NAC entity to poll the NAPs on its neighbor list in response to receiving at least one data burst from a WTRU.

19. The BWLAN NAP of claim 18 wherein the IFW entity provides the MAC entity with a list of active source and destination MAC addresses for both transmission and reception.

20. The BWLAN NAP of claim 18 wherein the WTRU mobility protocol is a push mobility protocol that enables the IFW entity to provide a list of WTRUs to the neighborhood NAC entity.