1. Extended header for piggybacked bandwidth request (P80216m/D1-15. 2. 2
Document Number: IEEE C802.16m-09_1761
Date Submitted:
Source:
Yi-Ting Lin, Tsung-Yu Tsai, Jiun-Je Jian, Chun-Yen Hsu, Youn-Tai Lee
Institute for Information Industry (III)
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Base Contribution: N/A
Re : P802.16m/D1
Purpose: Discussion and approval of the proposal into the IEEE P802.16m/D1
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2. Introduction
Piggybacked bandwidth request is used by the AMS to request for bandwidth for the same or different connection, to which the user data in the MAC PDU is mapped to.
Piggybacked bandwidth request is carried in the extended header. While it is lack of the extended header in P802.16m/D1.

3. Piggybacked bandwidth request types
Piggybacked bandwidth request shall have the following types:
PBR for the same flow
PBR for different flow
Only one flow
Multiple flows

4. Piggybacked bandwidth request for the same flow
Syntax
Size (bit)
Notes
PBR(){
LAST 1
Last Extended Header indication:
0 = one or more extended header follows the current extended header unless specified otherwise;
1 = this extended header is the last extended header unless specified otherwise
Type
TBD
PBR for the same flow
Request type
0:aggregate, 1:incremental
BR size 11
Amount of bandwidth requested
Reserved
variable
Shall be set to zero }

5. Piggybacked bandwidth request for different flow
Syntax
Size (bit)
Notes
PBR(){
LAST 1
Last Extended Header indication:
0 = one or more extended header follows the current extended header unless specified otherwise;
1 = this extended header is the last extended header unless specified otherwise
Type
TBD
PBR for different flow
PBRI
PBR index
0: PBR for the other one flow
1: PBE for the other flows
If (PBRI == 0) {
FID 4
Flow identifier
BR size 11
Amount of bandwidth requested }
If (PBRI == 1) { N 3
Number of flows
For (i=0; i<N; i++) {
Request type
0:aggregate, 1:incremental
Reserved
variable
Shall be set to zero

6. Proposed Text
[Insert the following section x “piggybacked bandwidth request extended header”]
x Piggybacked bandwidth request extended header (PBREH)
PBREH shall be used when the AMS performs piggybacked bandwidth request. There are two types of PBR which are PBR for the same flow, and PBR for different flow. Tables xxx and Table yyy are formats for the two types.

7. Table xxx — PBREH format for PBR for the same flow
Syntax
Size (bit)
Notes
PBR(){
LAST 1
Last Extended Header indication:
0 = one or more extended header follows the current extended header unless specified otherwise;
1 = this extended header is the last extended header unless specified otherwise
Type
TBD
PBR for the same flow
Request type
0:aggregate, 1:incremental
BR size 11
Amount of bandwidth requested
Reserved
variable
Shall be set to zero }

8. Table yyy — PBREH format for PBR for different flow
Syntax
Size (bit)
Notes
PBR(){
LAST 1
Last Extended Header indication:
0 = one or more extended header follows the current extended header unless specified otherwise;
1 = this extended header is the last extended header unless specified otherwise
Type
TBD
PBR for different flow
PBRI
PBR index
0: PBR for the other one flow
1: PBE for the other flows
If (PBRI == 0) {
FID 4
Flow identifier
BR size 11
Amount of bandwidth requested }
If (PBRI == 1) { N 3
Number of flows
For (i=0; i<N; i++) {
Request type
0:aggregate, 1:incremental
Reserved
variable
Shall be set to zero

9. Table 658—Description of Extended Header Types
Names
Description -
Fragmentation and packing extended header
See
TBD
Fragmentation extended header
Multiplexing extended header
See
Sleep Control extended header
See << x>>
Piggybacked bandwidth request extended header for the same flow
See x
Piggybacked bandwidth request extended header for different flow