X2 LTE Handover : US Patents 7,697,508 and 8,213,417
A wireless protocol that enables proxy mobility (as on LMA/MAG) assisted with location-based information (GPS) to trigger allocation of resources for handover or tunnels (GTP or PMIP) for data communication protocols. This patent covers LTE and X2 Handovers and several mobility conditions found in the ETSI Specification for LTE.
The proxy entities are required and are described as “ghost mobility” agents within MobileIPP but reside on an eNodeB. These agents send messages that trigger the creation of IP tunnels based on the location of the mobile terminal. This is how in 4G/LTE the MME uses the Tracking Area Identifiers (TAI) that will to select the proper s-GW to handover to. Once the selection has been concluded, the protocol permits the use of ghost agents to provide advertisement messages to the mobile nodes moving into a new cell.
MobileIPP is our patented technology that matches the main protocol in use by 4G LTE (e.g. X2 LTE Handover and others) and depicted in the ETSI. MobileIPP is a mobility protocol based on proxy messaging or using proxy entities to handle handover in the network, eNodeBs act on behalf of the mobile node sending UE Context information and communicating with Target eNodeBs to accelerate the creation of tunnels.
The following ETSI /3GPP Technical Specifications are covered by these patents:
- 3GPP ETSI 23 402 (html)
- 3GPP and ETSI 23 401 (html) and Tutorial (PDF)
- ETSI 129 275 (PDF)
- ETSI 136 400 (PDF),
- ETSI 136 423 (X2 Handover) (PDF) and others.
The ‘508 and ‘417 patents are used in 3G/4G deployments where an MME entity tracks the mobile terminal and assists in the handover and resource allocation handled by the LMA or the MAG, or any proxy entity that acts on behalf of the phone or tablet in the 4G network.
Key Concepts in the ‘508 and ‘417 Patents that read on 3GPP/LTE Specifications:
- x2 LTE Handover
- Registration mechanism and creation of IP tunnels
- Use of entities to act on behalf of the mobile node in the infrastruture
- Use of entities to announce (e.g. ICMP) potential handover points or foreign agents
- Use of proactive allocation of resources to enable handover
- Assistance by location-based services (e.g. MME) in the process of handover
- Transfer of UE state from one Base Station to the next