CS656 - Internet and High Layer Protocols
Question: Use concise and accurate sentences to describe the 8 steps in GSM standards to accomplish a handoff between base stations with a common MSC.
1. Old BSS informs MSC of impending handoff, provides list of 1+ new BSSs
2. ________________________________________________
3. New BSS allocates radio channel for use by mobile
4. ________________________________________________
5. Old BSS tells mobile: perform handoff to new BSS
6. ________________________________________________
7. Mobile signals via new BSS to MSC: handoff complete. MSC reroutes call
8. ________________________________________________
Answer:
1) Old BSS informs MSC of impending handoff, provides list of 1+ new BSSs
2) MSC sets up path (allocates resources) to new BSS
3) New BSS allocates radio channel for use by mobile
4) New BSS signals MSC, old BSS: ready
5) Old BSS tells mobile: perform handoff to new BSS
6) Mobile, new BSS signal to activate new channel
7) Mobile signals via new BSS to MSC: handoff complete. MSC reroutes call
8) MSC-old-BSS resources released