# US 8,787,227 B2 · Discontinuous reception with user equipment based mobility > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,787,227 B2 - Document ID: US8787227B2 - Status: Granted - Kind: B2 - Application number: 13/428,193 - Filed: 2012-03-23 - Published: 2012-10-04 - Granted: 2014-07-22 - Earliest claimed: 2011-03-25 - Assignees: Broadcom Corporation - Applicants: Tero Henttonen; Jussi Ojala; Juho Pirskanen - Inventors: Tero Henttonen; Jussi Ojala; Juho Pirskanen - Web page: https://patentgrep.com/patent/US8787227B2 ## CPC - H04W 52/0216: {using a pre-established activity schedule, e.g. traffic indication frame} - H04W 36/0088: {Scheduling hand-off measurements} - H04W 52/0229: {where the received signal is a wanted signal} - H04W 8/26: Network addressing or numbering for mobility support - H04W 36/0077: {of access information of target access point} - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## 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. ## Claims ### Claim 1 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. ### Claim 2 (depends on 1) The apparatus according to claim 1, in which the user equipment remains in a same radio resource control connected state during the transfer. ### Claim 3 (depends on 1) The apparatus according to claim 1, in which 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 and 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. ### Claim 4 (depends on 1) The apparatus according to claim 1, in which the processing system is arranged to cause the apparatus to at least broadcast the first identifier in system information. ### Claim 5 (depends on 1) The apparatus according to claim 1, in which the apparatus comprises a serving access node of the user equipment. ### Claim 6 A method comprising: utilizing 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 transferring 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. ### Claim 7 (depends on 6) The method according to claim 6, in which the user equipment remains in a same radio resource control connected state during the transfer. ### Claim 8 (depends on 6) The method according to claim 6, in which the first and the second identifiers are received from the user equipment in response to sending to the user equipment on a downlink control channel a resource allocation or a page addressed to the first identifier and 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. ### Claim 9 (depends on 6) The method according to claim 6, in which the method comprises broadcasting the first identifier in system information. ### Claim 10 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. ### Claim 11 (depends on 10) The non-transitory readable memory according to claim 10, in which the user equipment remains in a same radio resource control connected state while the radio resource control connection is transferred. ### Claim 12 (depends on 10) The non-transitory computer readable memory according to claim 10, in which the first and the second identifiers are received from the user equipment in response to executing an instruction for sending to the user equipment on a downlink control channel a resource allocation or a page addressed to the first identifier and 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. ### Claim 13 (depends on 10) The non-transitory computer readable memory according to claim 10, in which the set of instructions, when executed by the radio access node, causes the radio access node to at least broadcast the first identifier in system information.