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Peretz and all,
Just a clarification. Note the language in
802.16e-2005:
3.13 connection identifier
(CID): A 16-bit value that identifies a transport connection
or a uplink (UL)/downlink (DL) pair of associated management
connections (i.e., belonging to the same subscriber station (SS)) to
equivalent peers in the MAC of the base station (BS) and subscriber station
(SS). The connection identifier (CID) address space is common (i.e.,
shared) between UL and DL and Table 345 specifies how it is partitioned among
the different types of connections [emphasis added]. Security
associations (SAs) also exist between keying material and CIDs. See
also: connection.
This language is intended to clarify that, since
CID number space is a common, managed pool for both UL and DL, once a number is
allocated for assignment it cannot be used again until de-allocated. That reuse
prohibition includes for concurrent assignment in both the UL and DL. Note that
the previous line limits this restriction to transport connections.
Thanks,
Phillip Barber
Chief
Scientist
Broadband Wireless Solutions
Huawei Technologies Co.,
LTD.
----- Original Message -----
Sent: Wednesday, August 30, 2006 5:31
PM
Subject: Re: [STDS-802-16] transport
cid
On 8/30/2006 4:45 AM, Vasanth.Rajan wrote:
Hi all,
I have some doubt with transport CID and SFID,
mentioned below
SFID for a specific connection (may be an Rtps
connection) between BS and SS is unique in DL and UL;
SFID are directional in nature.
Although possible, I wouldn't assume same SFID for both UL and DL but (as you
indicated) unique per direction.
whether the same is true with Transport CID??? B’coz
I was confused by the statement in a document as mentioned below,
“An SFID shall never be associated with more than one
transport CID, and a transport CID shall
Never be associated with more than one
SFID” CID is between the BS and MS
(think of it as a MAC ID replacement), while SFID is between the BS and the
NCMS. CID is directly mapped by the CS to an SFID.
If it is different (both transport CID and SFID) then
what significance it has??? After
HO, SFID is the same but CID is different as a new mapping took place for the
new serving BS.
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