# US 11,122,644 B2 · Device and method of redirecting a communication device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,644 B2 - Document ID: US11122644B2 - Status: Granted - Kind: B2 - Application number: 15/673,425 - Filed: 2017-08-10 - Published: 2018-02-15 - Granted: 2021-09-14 - Earliest claimed: 2016-08-11 - Assignees: Acer Incorporated - Applicants: Acer Incorporated - Inventors: Hung-Chen Chen; Ching-Wen Cheng - Web page: https://patentgrep.com/patent/US11122644B2 ## CPC - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 8/22: Processing or transfer of terminal data, e.g. status or physical capabilities - H04W 48/06: based on traffic conditions - H04W 76/10: Connection setup - H04W 28/24: Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service] - H04W 48/18: Selecting a network or a communication service - H04W 84/18: Self-organising networks, e.g. ad-hoc networks or sensor networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A communication device for redirecting the communication device comprises a storage device for storing instructions and a processing circuit coupled to the storage device. The processing circuit is configured to execute the instructions stored in the storage device. The instructions comprise performing a first random access (RA) procedure with a first node; transmitting information of a service to the first node, when performing the first RA procedure; receiving a RRC redirection command message for redirecting the communication device to at least one second node from the first node, after transmitting the information of the service; selecting a first one of the at least one second node according to the RRC redirection command message; and performing a second RA procedure with the first one of the at least one second node. ## Claims ### Claim 1 A communication device for redirecting the communication device, comprising: a storage device; and a processing circuit, coupled to the storage device, wherein the storage device stores, and the processing circuit is configured to execute instructions of: performing a first random access (RA) procedure with a first node; transmitting information of a service to the first node, when performing the first RA procedure, wherein the information of the service comprises a service type of the service; receiving a radio resource control (RRC) redirection command message for redirecting the communication device to at least one second node from the first node, after transmitting the information of the service; selecting a first one of the at least one second node according to the RRC redirection command message; performing a second RA procedure with the first one of the at least one second node; and transmitting a RRC redirection response message comprising the service type to the first one of the at least one second node, in response to the RRC redirection command message; wherein the communication device selects the first one of the at least one second node according to a result of a cell search procedure performed by the communication device, after performing the cell search procedure; or selects the first one of the at least one second node according to a measurement performed before performing the first RA procedure; wherein the information of the service is transmitted in a RRC message to the first node. ### Claim 2 (depends on 1) The communication device of claim 1, wherein the instruction of performing the first RA procedure with the first node comprises: transmitting a RA request message comprising a preamble to the first node; and receiving a RA response message from the first node, after transmitting the RA request message. ### Claim 3 (depends on 1) The communication device of claim 1, wherein the information of the service is transmitted to the first node via a random access resource. ### Claim 4 (depends on 1) The communication device of claim 1, wherein the service type comprises at least one of a traffic characteristic type, a network slice identity (ID), a network slice instance ID and information of Qualify of Service (QoS). ### Claim 5 (depends on 4) The communication device of claim 4, wherein the traffic characteristic type comprises at least one of an Enhance Mobile Broadband (eMBB), an Ultra Reliable Low Latency Communication (URLLC), an Enhanced Machine Type Communication (eMTC), best effort traffic and a realtime streaming. ### Claim 6 (depends on 1) The communication device of claim 1, wherein the RRC redirection command message comprises at least one of a connection indication, a redirection indication, a reserve indication and at least one access information of the at least one second node. ### Claim 7 (depends on 6) The communication device of claim 6, wherein the connection indication indicates whether the communication device keeps a RRC connection between the communication device and the first node. ### Claim 8 (depends on 6) The communication device of claim 6, wherein the reserve indication indicates whether the communication device establishes a RRC connection between the communication device and the first node, when all of at least one RA procedure performed with all of the at least one second node are failed. ### Claim 9 (depends on 6) The communication device of claim 6, wherein the at least one access information comprises at least one node configuration of the at least one second node and at least one random access parameter of the at least one second node. ### Claim 10 (depends on 1) The communication device of claim 1, wherein the instructions further comprise: performing a third RA procedure with a second one of the at least one second node, if the second RA procedure is failed and a RA timer is not expired. ### Claim 11 A first node for redirecting a communication device, comprising: a storage device; and a processing circuit, coupled to the storage device, wherein the storage device stores, and the processing circuit is configured to execute instructions of: performing a random access (RA) procedure with the communication device; receiving information of a service from the communication device, when performing the RA procedure, wherein the information of the service comprises a service type of the service; and transmitting a radio resource control (RRC) redirection command message for redirecting the communication device to the at least one second node and for the communication device to select one of the at least one second node to the communication device, in response to the information of the service, wherein the communication device selects the one of the at least one second node according to a result of a cell search procedure performed by the communication device, after performing the cell search procedure; or selects the one of the at least one second node according to a measurement performed before performing the RA procedure; wherein the information of the service is received in a RRC message from the communication device; wherein the one of the at least one second node receives a RRC redirection response message comprising the service type from the communication device, in response to the RRC redirection command message. ### Claim 12 (depends on 11) The first node of claim 11, wherein the instruction of performing the RA procedure with the communication device comprising: receiving a RA request message comprising a preamble from the communication device; and transmitting a RA response message to the communication device, after receiving the RA request message. ### Claim 13 (depends on 11) The first node claim 11, wherein the information of the service is received from the communication device a via a random access resource. ### Claim 14 (depends on 11) The first node of claim 11, wherein the service type comprises at least one of a traffic characteristic type, a network slice identity (ID), a network slice instance ID and information of Qualify of Service (QoS). ### Claim 15 (depends on 14) The first node of claim 14, wherein the traffic characteristic type comprises at least one of an Enhance Mobile Broadband (eMBB), an Ultra Reliable Low Latency Communication (URLLC), an Enhanced Machine Type Communication (eMTC), best effort traffic and a realtime streaming. ### Claim 16 (depends on 11) The first node of claim 11, wherein the information of the service further comprises information of the communication device. ### Claim 17 (depends on 11) The first node of claim 11, wherein the RRC redirection command message comprises at least one of a connection indication, a redirection indication, a reserve indication and at least one access information of the at least one second node. ### Claim 18 (depends on 17) The first node of claim 17, wherein the connection indication indicates whether the communication device keeps a RRC connection between the communication device and the first node. ### Claim 19 (depends on 17) The first node of claim 17, wherein the reserve indication indicates whether the communication device establishes a RRC connection between the communication device and the first node, when all of at least one RA procedure performed with all of the at least one second node are failed. ### Claim 20 (depends on 17) The first node of claim 17, wherein the at least one access information comprises at least one node configuration of the at least one second node and at least one random access parameter of the at least one second node.