8 Enhanced Interference Management
25.4673GPPRelease 17Stage 2TSUTRAN architecture for 3G Home Node B (HNB)
8.1 General
There is a type of interference which may be considered: 1) Interference from HNB to Macro.
Scenarios are listed in Table 8.1-1.
Table 8.1-1. Interference scenarios.
|
Scenario |
Aggressor |
Victim |
Type of interference |
|
1 |
HNB UE (UL) |
Macro NB |
Interference from HNB to Macro *applicable to co-channel deployment scenario |
|
2 |
HNB (DL) |
Macro UE |
8.2 Mitigation of interference from HNB to Macro
8.2.1 Interference from HNB UE (UL) to Macro NB
The scenario involves:-
1. Adaptively limiting the HNB UE’s maximum UL Tx Power in connected mode possibly using HNB UE measurement and calculating the path loss between HNB UE and Macro NB.
8.2.2 Interference from HNB (DL) to Macro UE
The scenario involves:-
1. Redirecting unauthorized UE to another carrier possibly based on uplink access attempts by unauthorised UE.
2. Adjusting HNB’s DL CPICH Tx Power adaptively either temporarily or over long term possibly based on uplink access attempts by unauthorised UE.
Annex A (informative):
Implementation of CN functions within the HNB-GW for support of inter-HNB intra-HNB-GW SRNS Relocation