Page 343 - 5G Basics - Core Network Aspects

Core network aspects 1

Appendix II

Generic scenarios of multi-connection
(This appendix does not form an integral part of this Recommendation.)

Multi-connection scenarios are shown but not limited to the ones depicted in Figure 6-1. The general
principles of all multi-connection scenarios are summarized as follows:
1) All multi-connection scenarios are based on UEs having multiple physical interfaces, which mean
scenarios with single physical interface are not in the scope of multi-connection.
2) The following cases are not considered as multi-connection scenarios:
• Dual mode cell phones which must disable one radio module in order to use the second.
• Handover.

3) In multi-connection scenarios, the multiple network entities belonging to different connections may
interwork.
4) The layers in the multi-connection scenarios are the logic layers, but not the physical layers.

Applica Applica
Application Application Application Application
tion tion
Service control Service control Service control Service Service Service Service
control control control control

Access Access Access Access Access Access
Access control Access control
control control control control control control
Access Access Access Access Access Access Access Access
Access point
point point point point point point point point
UE UE UE UE UE

A B C D E

Figure II.1 – Generic multi-connection scenarios
1) Scenario A

In this scenario, one UE accesses one access point (e.g., BSS, NodeB or eNodeB) via multiple frequency bands
simultaneously. By accessing one AP via multiple frequencies, higher peak data rate can be provided to the
UE. This is useful to provide higher data rate service and optimized user experience, and also trunking
efficiency can be increased, which helps to improve resource utilization.
2) Scenario B
In this scenario, the UE can access multiple access points simultaneously using the same access technology.
This scenario provides performance improvements to the user, especially to the user in the cell edge, where
the interference can be eliminated based on the coordination of different APs. Availability and use of this
scenario depends on broad deployment of multiple antenna technology.
3) Scenario C
In this scenario, the UE connects to heterogeneous access networks which are controlled by different access
control functions but the same service control function. The access control management and the QoS policies
are enforced in each access control function and established by the service control point. In this scenario,
data flows can be transmitted over different access networks to obtain different QoS assurance.

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