1. A MAC Addressing in IEEE 802.16m
IEEE Presentation Submission Template (Rev. 9)
Document Number:
IEEE C802.16m-08/754r1
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Source:
Sungcheol Chang, Sunggeun Jin, Seokheon Cho, JungIm Kim, Voice:
SooJung Jung, Hyun Lee, Kwangjae Lim, Chulsik Yoon. {scchang, kjlim,
ETRI
161 Gajeong-dong Yusong-gu Daejeon, Korea
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Re : IEEE 80216m-08/024 : Call for Comments and Contributions on Project m SDD – Upper MAC concepts and methods (limited to addressing, mobility and power management) - Addressing
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To discuss and adopt the proposed text in the next revision of the m SDD
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2. Scope and Keys MAC connection identifier
Reduction of duplicate information
Hierarchical architecture: Two step
Separation of user-related and service-related parts
Small MAC PDU header for VoIP service
Minimize MAC PDU overhead with service-related connection identifier within a user.

3. Motivations Flat connection identifier in legacy system
CID with user-related and service-related information
User-related information is duplicated if a MAP indicates the user information
2-byte CID in 6-byte Fixed MAC header
PDU header overhead for small-size SDU
23-byte SDU with ROHC for G.729A voice source
6-byte PDU header + 4-byte CRC (optional)

4. MAP and CID Modulation-based resource allocation
CID in MAC PDU has the information of user and service
User-based resource allocation
DL/UL resource allocation with basic CID
CID in MAC PDU has the duplicate information of user.
HARQ is applicable.

5. Hierarchical Identification
Separation of user-related and service related parts.
User identification for resource allocation
User MAC ID is unique within a cell
Service identification with a user for PDU
User SID (Service ID) is unique within a user

6. MAC PDU with Small Overhead
New MAC PDU header with User SID
Use User SID ≤ 1 byte instead of 2-byte CID
Remove HCS
Reduce and rearrange redundant fields
Small MAC overhead for VoIP SDU
MAC PDU header ≤ 3 bytes
10% overhead reduction for VoIP SDU

7. SDD Texts 11.X Upper MAC Concepts 11.x.1 MAC Addressing
MAC identification has an hierarchical structure which consists of user-related and service-related parts. For the user-related part, User MAC Identifier (ID)s identify users in a cell uniquely. The User MAC ID is utilized at resource allocation in control channel or MAP. User Service Identifier (SID)s discriminates connections within user as the service-related part. The User SID is in new MAC PDU header to identify a connection within user. The MAC PDU results in low overhead.
The set of ID sizes is FFS. The ID size is configurable by cell broadcast information.