1. Broadcast of Neighbor Info
January 2003
IEEE /100r1
doc: IEEE /553r0
July 2003
Broadcast of Neighbor Info
Joe Kwak, Akbar Rahman
InterDigital
Submission
Joe Kwak, InterDigital

2. Outline Introduction Summary of proposal Operation principle
January 2003
IEEE /100r1
Outline
Introduction
Summary of proposal
Operation principle
Joe Kwak, InterDigital
Submission

3. January 2003
IEEE /100r1
Introduction
Currently in k there is a point to point method to allow STAs to get neighbor channel information from the AP (AP Channel Report).
The Neighbor List information (such as AP Channel Report and Site Report) will allow for more efficient STA roaming (handover/reselections) to be performed.
Recent discussions indicate that extending Beacon frames with neighbor channel information may be disadvantageous with respect to resource usage.
Another alternative is presented here.
Joe Kwak, InterDigital
Submission

4. January 2003
IEEE /100r1
Summary of Proposal (1)
As a possible alternative to consider, a broadcast-type message containing the Neighbor Information could supplement to the current point-to-point signaling without significant impact to radio resource utilization in the channel.
In , broadcast messages are,
Sent with contention by the AP after the Beacon frame
Addressed to all STA’s in the BSS
No guaranteed delivery (No RTS/CTS sequence or ACK from STAs)
Joe Kwak, InterDigital
Submission

5. AP Channel Map as broadcast management type frame
January 2003
IEEE /100r1
Summary of Proposal (2)
Beacon Interval
Time
Beacon Frame
AP Channel Map as broadcast management type frame
Contention phase
Joe Kwak, InterDigital
Submission

6. Principle of operation (1)
January 2003
IEEE /100r1
Principle of operation (1)
Assume an AP has Neighbor information obtained either through:
OAM, or
Proprietary signaling / IAPP from other network nodes (AP’s or Access Routers), or
Active/passive scanning of other channels, or
Measurement reports from STA’s in BSS
The AP could then choose to periodically broadcast (typically less frequent then Beacon frames) the Neighbor Info as assistance data and only to a group who can use the data.
In parallel, the STA could still choose to use active (Probe Request) or passive scanning as a backup and/or complement to the broadcast-type Neighbor Info.
Joe Kwak, InterDigital
Submission

7. Principle of operation (2)
January 2003
IEEE /100r1
Principle of operation (2)
The periodicity of the Neighbor Info broadcast can be implementation dependent, but it would typically be in the order of several seconds:
STAs have limited and/or slow mobility compared to full mobile communication systems
Uses less frame time than repeated Beacon broadcast
Maintains the radio resource usage efficiency of point-to-multipoint messaging
The broadcast-type Neighbor Info could be a Management frame type with same message format as the existing pt-pt message
The associated procedures in the STA after reception of the broadcast Neighbor Info should be the same as that of the existing pt-pt message (with exception of Ack part)
Joe Kwak, InterDigital
Submission

8. Strawpole for normative text
Should we draft normative text along these lines to permit group broadcast of neighbor info to TGk terminals?
Vote YEA _______
Vote NEA _______
ABSTAIN _______
Joe Kwak, InterDigital
Submission