If an entity has morethan one short message or notification to send, then it is useful to maintainthe Radio Resource (RR) connection (in A/Gb mode) or the signalling connection(in Iu mode) in between transfers. ......
If another short message or a memoryavailable notification is to be sent, an originating SMR entity in the MS may choose to continue to use the same RR connection (in A/Gb mode) or the signallingconnection (in Iu mode).
When an MS sendssuccessive memory available notifications and/or mobile originated shortmessages on different RR connections (in A/Gb mode) or signalling connections(in Iu mode), the MS is strongly recommended to use different TransactionIdentifiers for the old and new MM connections.