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Donor Evolved NodeB Detection, Identification, and Selection via the Radio Interface Disclosure Number: IPCOM000197758D
Publication Date: 2010-Jul-21
Document File: 6 page(s) / 2M

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The Prior Art Database

Related People

Prior Art Publishing GmbH: CONTACT

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Donor Evolved NodeB Detection, Identification, and Selection via the Radio Interface

Peter Szilagyi, Henning Sanneck

Relays are mobile network base stations, which con- nect to the network via an in-band wireless backhaul link instead of using a dedicated wired or wireless backhaul link, e.g., a microwave backhaul link. In- band relaying means that the same radio resources are used by relays and customer UEs (User Equip- ments). Relay nodes use a dedicated eNB (Evolved NodeB), called Donor eNB through which they pro- vide network access for UEs. Relaying is a common scheme that is already standardized for WiMAX in IEEE802.16j and is currently under standardization for LTE and LTE-Advanced (WiMAX: Worldwide In- teroperability for Microwave Access; LTE: Long Term Evolution). Regardless of the specific implementation of relaying, there is always a need for identifying the donor node which will connect the relay node to the core network.

In the majority of the cases, the deployment of the relay nodes is envisaged to be preceded by consider- able network planning. The main reason for this is the strict QoS (Quality of Service) requirement of the wire- less backhaul spanning between the RN (Relay Node) and its DeNB (Donor eNB). Network planning means the selection of the site where a RN will be deployed (regular base station site, lamppost, or public facility) and the DeNB association for the site, i.e., the regular eNB through which the RN that is deployed at the site should connect to the core network and relay user traf- fic in operational state.

The following DeNB selection strategies can be con- ceived based on where the decision for selecting the DeNB is made:

1. The DeNB is selected off-line by the operator dur- ing network planning and the DeNB association is provisioned into the OAM (Operation, Admin- istration and Maintenance) system as part of the planning data. The selected DeNB association is downloaded when the RN is deployed and the con- figuration (self-configuration) takes place.

2. The DeNB is selected dynamically by the OAM sys- tem during the deployment process based on data

acquired from the RN (e.g., the strengths of re- ceived radio signals or SINRs from different eNB) and additional knowledge about the network that is present at the OAM level but not at the network element level (e.g., planned locations of eNBs). The selected DeNB association is downloaded to the RN after it is computed in the OAM. The advantage of this approach is that the decision can be based on up-to-date parameters and a view of the current ac- tual network status (i.e., not just the planned state which may differ particularly during the initial de- ployment process).

3. The RN itself selects the DeNB, during the de- ployment process,. This can happen with ad-hoc deployed RNs, e.g., deployed to provide enhanced throughput for emergency scenes. The advantage of this strategy is that it is scalable, since the deci-...