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Content for
TR 36.875
Word version: 13.1.0
1…
2…
2
References
3
Definitions, symbols and abbreviations
4
Description of the requirements and functionality for dual connectivity extension
4.1
SIPTO in the dual connectivity
4.2
Location reporting enhancement
4.3
Handover enhancement
4.4
Other enhancement or optimization
4.5
Support of CSG and LIPA for dual connectivity
5
Conclusions
$
Change History
2
References
3
Definitions, symbols and abbreviations
3.1
Definitions
3.2
Abbreviations
Word‑p. 7
4
Description of the requirements and functionality for dual connectivity extension
4.1
SIPTO in the dual connectivity
4.1.1
SIPTO at the Local Network with stand-alone GW for Dual Connectivity
4.1.2
SIPTO at the Local Network with collocated L-GW for Dual Connectivity
Word‑p. 9
4.2
Location reporting enhancement
Word‑p. 11
4.2.1
Introduction
4.3
Handover enhancement
4.3.1
Scenarios
4.3.1.1
Single connectivity to dual connectivity
4.3.1.2
Dual connectivity to Dual connectivity
Word‑p. 12
4.3.2
Solutions
Word‑p. 13
4.3.2.1
Signalling solution applicable for all scenarios
4.3.2.2
Handover with SeNB addition
Word‑p. 14
4.3.2.3
Inter-MeNB handover without SeNB change
Word‑p. 15
4.3.2.4
Range of the UE X2AP ID
Word‑p. 16
4.4
Other enhancement or optimization
Word‑p. 17
4.4.1
UE-AMBR coordination over X2
4.4.1.1
Introduction
4.4.1.2
Solutions
4.4.2
X2-UP flow control
Word‑p. 19
4.4.2.1
Ensuring delay target
4.4.2.2
X2-U UL packet loss
4.4.3
Handling of User Inactivity
4.4.3.1
Optimized Setting of user inactivity timer in SeNB
4.4.3.1.1
Introduction
4.4.3.1.2
Solutions
4.4.3.2
Avoid useless Release of SeNB due to user inactivity
Word‑p. 20
4.4.3.2.1
Introduction
4.4.3.2.2
Solutions
4.4.4
Proposed Methods to enhance capacity in the presence of UEs configured with DC and without DC
4.4.4.1
Problem Statement
4.4.4.2
Proposed Solutions
4.4.4.2.1
User Plane solution 1: Bi-directional exchange of UE throughput history throughput information
4.4.4.2.1.1
Description as of reference [8]
4.4.4.2.1.2
Discussion as of reference [9]
Word‑p. 23
4.4.4.2.2
User Plane solution 2: Uni-directional exchange of UE throughput history throughput information
Word‑p. 24
4.4.4.2.2.1
Description as of reference [8]
4.4.4.2.2.2
Discussion
4.4.4.2.3
Control plane solution: Ensuring provision of minimum QoS by only one eNB involved in DC through coordination between MeNB and SeNB over X2AP
4.4.4.2.3.1
Description as of reference [8]
4.4.4.2.3.2
Description as of reference [10]
Word‑p. 26
4.4.4.2.3.3
Discussion as of reference [9]
Word‑p. 27
4.4.4.2.4
Applying local RRM strategies based on information available via already specified means
Word‑p. 28
4.4.4.2.4.1
Description as of reference [10]
4.5
Support of CSG and LIPA for dual connectivity
Word‑p. 29
4.5.1
HeNB with closed and hybrid access mode
4.5.2
LIPA
Word‑p. 35
5
Conclusions
$
Change History
Word‑p. 37