Tech-invite 3GPPspace IETFspace

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Content for TR 25.706 Word version: 13.0.0

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5.1 Mechanism to enhance downlink signalling performance 5.2 Downlink signalling performance enhancements 5.3 SRB coverage over HSPA enhancements 5.4 Extended RNTI

5 Study Areas p. 7

5.1 Mechanism to enhance downlink signalling performance p. 7

5.1.1 Solutions p. 7

5.1.1.1 Reduced TPC frequency with repetition of TPC commands p. 7

5.1.1.2 Compressed mode operation p. 8

5.1.1.3 Reduced TPC frequency with DTX of TPC commands p. 9

5.1.2 Evaluation p. 9

5.1.2.1 Evaluation methodology p. 9

5.1.2.2 Downlink evaluation results ([4]) p. 9

5.1.2.2.1 Link evaluation results p. 9

5.1.2.2.2 System evaluation results p. 11

5.1.2.3 Downlink evaluation results ([5]) p. 18

5.1.2.4 Downlink evaluation results ([6]) p. 19

5.1.2.5 Uplink evaluation results p. 21

5.1.2.5.1 Link evaluation results ([7]) p. 21

5.1.2.5.2 Link evaluation results ([8]) p. 22

5.1.2.5.3 Link evaluation results ([9]) p. 24

5.1.2.5.4 Observations from the uplink evaluations p. 24

5.1.3 Impact on UE implementation p. 24

5.1.4 Requirement p. 25

5.1.5 Conclusion p. 25

5.2 Downlink signalling performance enhancements p. 26

5.2.1 Enhanced signalling on RRC parameters configuration p. 26

5.2.1.1 Background and motivation p. 26

5.2.1.2 Analysis p. 27

5.2.1.3 Solutions p. 28

5.2.1.3.1 Retrievable configuration in dedicated RRC signalling p. 28

5.2.1.3.2 Retrievable configuration in system information p. 29

5.2.1.4 Conclusions p. 30

5.2.2 Improved RRC synchronized procedures p. 30

5.2.2.1 Background and motivation p. 30

5.2.2.2 Analysis p. 31

5.2.2.3 Solutions p. 31

5.2.2.3.1 Solution 1 p. 31

5.2.2.3.3 Solution 2 p. 32

5.2.2.4 Conclusions p. 33

5.2.3 State transition enhancements p. 34

5.2.3.1 Background and motivation p. 34

5.2.3.2 Analysis p. 35

5.2.3.3 Solutions p. 35

5.2.3.3.1 Solution 1 p. 36

5.2.3.3.2 Solution 2 p. 36

5.2.3.3.3 Solution 3 p. 37

5.2.3.4 Conclusions p. 37

5.2.4 Seamless URA_PCH state transition to CELL_FACH p. 38

5.2.4.1 Background and motivation p. 38

5.2.4.2 Analysis p. 38

5.2.4.3 Solutions p. 39

5.2.4.3.1 Solution of the URA-wide RNTI p. 39

5.2.4.3.2 Solution of the cell-wide RNTI p. 40

5.2.4.4 Conclusions p. 42

5.2.5 Optimization from IDLE to CONNECTED state p. 43

5.2.5.1 Background and motivation p. 43

5.2.5.2 Analysis p. 43

5.2.5.3 Solutions p. 44

5.2.5.4 Conclusions p. 44

5.3 SRB coverage over HSPA enhancements p. 45

5.3.1 Improved HARQ retransmission p. 45

5.3.1.1 Background and motivation p. 45

5.3.1.2 Analysis p. 45

5.3.1.3 Solutions p. 45

5.3.1.4 Evaluation p. 46

5.3.1.5 Conclusions p. 47

5.4 Extended RNTI p. 48

5.4.1 Background and motivation p. 48

5.4.2 Analysis p. 48

5.4.3 Solutions p. 48

5.4.3.1 Solution 1 p. 48

5.4.3.2 Solution 2 p. 49

5.4.4 Conclusions p. 50

6 Impact on RAN WGs p. 50

6.1 Impact on RAN1 specifications p. 50

6.2 Impact on RAN2 specifications p. 51

6.3 Impact on RAN3 specifications p. 51

6.4 Impact on RAN4 specifications p. 52

A Performance evaluation methodology p. 53

A.1 Link simulation assumptions p. 53

A.2 System simulation assumptions p. 54

B An example of signalling flows between a UE and network p. 56

C A recorded trace of messages exchanged between a UE and RNC p. 57

$ Change History p. 58