Difference between revisions of "File:Lte-ue-rrc-states.png"

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(Buherman uploaded a new version of "File:Lte-ue-rrc-states.png": These 4 figures illustrate the changes of UE RRC state model for LTE module in relation to the GSoC 2013 project. The first figure is the state model before the project begins)
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A proposed update to UE RRC state machine for LTE module during GSoC 2013.
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The changes of UE RRC state model for LTE module in relation to the GSoC 2013 project.
  
In comparison with the previous state machine, the new one has a clear separation between manual attachment and automatic attachment (i.e. Idle mode initial cell selection).
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The first figure is the state model before the project begins, while the second figure is the state model after the "standard" cut point.
  
Moreover, the previous IDLE_WAIT_SYSTEM_INFO state is expanded to more than one states, each associated with the actual System Information that the UE is waiting for (e.g. MIB, SIB1, and SIB2). This expansion may provide better debugging capability compared to the previous state machine.
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One of the reviews received by the project is to expand the states related to cell selection. The expansion aims to distinguish the status of each System Information message (i.e. MIB, SIB1, and SIB2) and the network attachment method used (i.e. manual or automatic). This expansion may provide better debugging capability compared to the previous state machine. The expanded state model is depicted in the third figure.
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The last figure is another proposed expansion. It is the objective of the development of realistic handover, which is one of the future deliverables of the project. It includes Random Access failure, handover failure, RRC Connection Re-establishment (RRD CONN RE-EST in the figure) and Radio Link Failure (RLF).

Latest revision as of 10:01, 29 August 2013

The changes of UE RRC state model for LTE module in relation to the GSoC 2013 project.

The first figure is the state model before the project begins, while the second figure is the state model after the "standard" cut point.

One of the reviews received by the project is to expand the states related to cell selection. The expansion aims to distinguish the status of each System Information message (i.e. MIB, SIB1, and SIB2) and the network attachment method used (i.e. manual or automatic). This expansion may provide better debugging capability compared to the previous state machine. The expanded state model is depicted in the third figure.

The last figure is another proposed expansion. It is the objective of the development of realistic handover, which is one of the future deliverables of the project. It includes Random Access failure, handover failure, RRC Connection Re-establishment (RRD CONN RE-EST in the figure) and Radio Link Failure (RLF).

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current09:56, 29 August 2013Thumbnail for version as of 09:56, 29 August 20131,567 × 770 (192 KB)Buherman (Talk | contribs)These 4 figures illustrate the changes of UE RRC state model for LTE module in relation to the GSoC 2013 project. The first figure is the state model before the project begins, while the second figure is the state model after the "standard" cut point....
12:35, 9 August 2013Thumbnail for version as of 12:35, 9 August 2013704 × 1,283 (76 KB)Buherman (Talk | contribs)A proposed update to UE RRC state machine for LTE module during GSoC 2013.
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