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Authors:
James F. Kurose, Keith W. Ross
Chapter:
Wireless And Mobile Networks
Exercise:
Problems
Question:16 | ISBN:9780132856201 | Edition: 6

Question

In our discussion of how the VLR updated the HLR with information about the mobile’s current location, what are the advantages and disadvantages of providing the MSRN as opposed to the address of the VLR to the HLR?

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Answer

If the MSRN is provided to the HLR, then the value of the MSRN must be updated in the
HLR whenever the MSRN changes (e.g., when there is a handoff that requires the MSRN
to change). The advantage of having the MSRN in the HLR is that the value can be
provided quickly, without querying the VLR. By providing the address of the VLR
Rather than the MSRN), there is no need to be refreshing the MSRN in the HLR.

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