US 8,787,227 B2 · Discontinuous reception with user equipment based mobility

Abstract

A new RRC Connected (mobility) state in which a UE utilizes a temporary identifier to monitor a downlink control channel in accordance with a discontinuous reception cycle; and maintains the new connected state, the discontinuous reception cycle and the temporary identifier while the UE re-selects to a second/serving access node which lies within a same designated reselection area as a first/source access node. The DRX cycle is maintained but re-aligned with a system frame number of the second access node; the temporary identifier is a CRNTI and the designated re-selection area is defined by all contiguous cells in which respective access nodes broadcast the CRNTI in system information; the UE re-selects to the second access node; and the UE enters the new connected mobility state automatically upon expiry of a time alignment timer or upon explicit network signaling while in a different connected state.

Claims13

Dependent claims

An apparatus, comprising a processing system that includes at least one processor and a memory storing a computer program, in which the processing system is arranged to:

utilize a first identifier of a user equipment and a second identifier of an access node, received from the user equipment in a random access procedure, to obtain from the access node a context for the user equipment;
and
transfer to the apparatus from the access node a radio resource control connection established according to the context;
wherein at least one of:
the first and the second identifiers are received from the user equipment in response to the apparatus sending to the user equipment on a downlink control channel a resource allocation or a page addressed to the first identifier, in which the first identifier sent to the user equipment on the downlink control channel is sent with a mask reserved for the radio resource control connected state which is a radio resource control connected mobility state;
and
the processing system is arranged to cause the apparatus to at least broadcast the first identifier in system information.

4 more elements

A non-transitory computer readable memory comprising a set of instructions, which, when executed by a radio access node, causes the radio access node to:

utilize a first identifier of a user equipment and a second identifier of an access node, received from the user equipment in a random access procedure, to obtain from the access node a context for the user equipment;
and
transfer from the access node a radio resource control connection established according to the context;
wherein at least one of:
the first and the second identifiers are received for the user equipment in response to the apparatus sending to the user equipment on a downlink control channel a resource allocation or a page addressed to the first identifier, in which the first identifier sent to the user equipment on the downlink control channel is sent with a mask reserved for the radio resource control connected state which is a radio resource control connected mobility state;
and
the processing system is arranged to cause the apparatus to at least broadcast the first identifier in system information.

4 more elements

Dependencies are inferred from the claim text.

Discontinuous reception with user equipment based mobility

Life of this patent

Discontinuous reception with user equipment based mobility

Life of this patent

Abstract

Claims13