Transcript Slides S802.16m-08/304

Proposal for Multicarrier Bandwidth Request Control Mechanism
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
IEEE S802.16m-08/304r2
Date Submitted:
2008-05-13
Source:
Chie Ming Chou ([email protected])
Richard Li
Frank Ren
Chun-Yen Wang
Wern-HO Sheen
*<http://standards.ieee.org/faqs/affiliationFAQ.html>
Venue:
(Macau, China, May 2008)
Base Contribution:
IEEE 802.16m-08/489
Purpose:
Discussion
Notice:
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Bandwidth request ranging sub-channel in
Multicarrier
• To support fast response of MS request, bandwidth request
channel will be allocated within every frame (details refer to
C802.16m-08/303)
– Indicate by USCH
– Allocate in primary carrier only
• If BR ranging sub-channel is allocated in every carrier, there is a lot of
resources & process (multi-contention) overhead
• The type of requests can be further divided into two cases
2
Aggregated request for BR process in
Multicarrier
• MS can aggregate required
bandwidth & request this value
– Connections with same QoS level
can be aggregated
– Use a group CID in BR header
• The format and service flow
operations of group CID is TBD
• BS may allocate resources in
one primary or one secondary
carrier
Aggregated request
MS
BS
BR code
CDMA_allocate-IE
BR header*
Data grant
– BS can consider loading balance in
Multicarrier with this application
BR header* is a legacy header with a new
group CID
3
Multiple requests for BR process in
Multicarrier
•
Employed for connections with different
QoS classes.
– BR random code domain is partitioned
into several ranges
• When receiving a code with a specific
range, BS is notified how many resources
of BR headers shall be grant for later
transmission
– MS can send multiple BR headers
regarding with individual groups or
connections.
• Use a group CID or connection CID in BR
header
•
Multiple requests
MS
BS
BR code
CDMA_allocate-IE
Multi-BR headers
(with group CIDs or
connection CIDs)
BS can allocate resources on different
carriers.
– BS may check the group CID or
connection CID in BR header and find out
which on-serving carrier is and try to
allocate the granted resources as same
carrier as possible.
Data grant
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Proposed Text
•
•
•
[Insert the following text in Section 19 of IEEE 802.16m-08/003r1]
19. x. UL Control Structure
19. x. 1 Bandwidth allocations and request mechanisms
•
Bandwidth Request (BR) ranging sub-channel will only be allocated in primary carrier. Its
location is dynamical and indicated by USCH.
•
Two types of BR are supported in Multicarrier.
•
MS can group connections with same QoS class and calculate total required bandwidth. This is
called aggregated request in Multicarrier. The CID placed in this header will be a group CID
with mapping to one QoS class. After receiving this header, BS may grant resources and then
MS can schedule connections for its transmissions.
•
Multiple requests are employed for connections with different QoS class. BR ranging code
domain will be partitioned into several ranges and each range will represent how many
resources of BR headers are needed. When receiving code within one specific range, BS will
be notified how many resources of BR headers shall be grant for later transmission and give
the corresponding CDMA Allocation IE. After receiving CDMA Allocation IE, MS can send
multiple BR headers regarding with individual groups or connections. The CID appeared in BR
header can be a group CID or a connection CID. Requested connections can belong to
different QoS classes within different carrier and BS can allocate resources for these requests
on different carriers.
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