# US 10,375,756 B2 · Method of controlling operation of a communication device, transceiver operating accordingly, and computer program > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,756 B2 - Document ID: US10375756B2 - Status: Granted - Kind: B2 - Application number: 15/463,784 - Filed: 2017-03-20 - Published: 2017-07-06 - Granted: 2019-08-06 - Earliest claimed: 2011-09-22 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Ericsson (publ) - Inventors: Bengt Lindoff; Anders Wallén; Leif Wilhelmsson - Web page: https://patentgrep.com/patent/US10375756B2 ## CPC - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 52/0235: {where the received signal is a power saving command} - H04W 60/06: De-registration or detaching - H04W 68/02: Arrangements for increasing efficiency of notification or paging channel - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04W 68/00: User notification, e.g. alerting and paging, for incoming communication, change of service or the like - 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 communication device is arranged for three main communication states: a detached state, an idle state, and an active state. The communication device connects to the cellular communication network such that a transition from the detached state to any of idle state or active state is made, performs scheduled operations in the active state or idle state, determines, when a transition from the active state to the idle state occurs, a time instant for a next operation in the active state, disconnects from the cellular communication network such that a transition to the detached state is made, and, when the time for next operation in the active state is approaching, connects to the cellular communication network again. A transceiver and a computer program are also disclosed. ## Claims ### Claim 1 A method, in a communication device arranged to operate in a cellular communication network employing a paging signal to allow discontinuous reception for communication devices, wherein the communication device is arranged for three main communication states, the three main communication states consisting of: a detached state where the communication device is not registered to the cellular communication network; an idle state where the communication device is registered to the cellular communication network, and receives paging signals through discontinuous reception; and an active state where the communication device is registered to the cellular communication network and performs communication with the cellular communication network essentially continuously, wherein the communication device is arranged for a power save mode of the detached state and the method comprises: when entering the power saving mode, sending a detach request to the cellular communication network and receiving a detach accept from the cellular communication network; and, when disconnected from the cellular communication network and a time for next operation in the active state or scheduled operations in the idle state is imminent, reconnecting to the cellular communication network such that a transition from the detached state to any of the idle state or the active state is made. ### Claim 2 (depends on 1) The method of claim 1, further comprising performing scheduled operations; and entering the power saving mode when activities in the active state are not imminent; and when disconnected, making a transceiver circuitry of the communication device ready for the reconnecting to the cellular communication network when the time for next operation in the active state or scheduled operations in the idle state is approaching. ### Claim 3 (depends on 1) The method of claim 1, wherein the entering of the power saving mode is conditioned on the time until time for next operation in the active state or scheduled operations in the idle state being above a time threshold. ### Claim 4 (depends on 3) The method of claim 3, further comprising extracting the information about time for next operation in active state or scheduled operations in the idle state from data information received when performing the scheduled operations. ### Claim 5 (depends on 3) The method of claim 3, wherein the time threshold is at least 10 times the cycle of the discontinuous reception. ### Claim 6 (depends on 1) The method of claim 1, wherein the sending of a detach request to the cellular communication network is accompanied by the sending an indication to the cellular communication network about a time for re-connecting next time. ### Claim 7 A transceiver arranged to operate in a cellular communication network employing a paging signal to allow discontinuous reception for communication devices, wherein the transceiver is arranged for three main communication states consisting of: a detached state where the transceiver is not registered to the cellular communication network; an idle state where the transceiver is registered to the cellular communication network, and receives paging signals through discontinuous reception; and an active state where the transceiver is registered to the cellular communication network and performs communication with the cellular communication network essentially continuously, wherein the transceiver is arranged for a power saving mode of the detached state and the transceiver comprises a controller arranged to control operation of the transceiver, wherein the controller is arranged to control operation of the transceiver to, at disconnecting from the cellular communication network, send a detach request to the cellular communication network and receive a detach accept from the cellular communication network, and the transceiver is arranged to, when reconnecting to the cellular communication network, perform a transition from the detached state to any of the idle state or the active state. ### Claim 8 (depends on 7) The transceiver of claim 7, wherein the controller is further arranged to: perform scheduled operations; enter the power saving mode when activities in the active state or scheduled operations in the idle state are not imminent, by disconnecting from the cellular communication network; and when disconnected, reconnect to the cellular communication network when a time for next operation in the active state or scheduled operations in the idle state is approaching. ### Claim 9 (depends on 7) The transceiver of claim 7, wherein the controller is arranged to condition the entering of the power saving mode upon the time until time for next operation in the active state or scheduled operations in the idle state being above a time threshold, while if the time until time for next operation in the active state or scheduled operations in the idle state is below the time threshold, remaining in the idle state. ### Claim 10 (depends on 9) The transceiver of claim 9, wherein the controller is arranged to extract the information about time for next operation in the active state or scheduled operations in the idle state from data information received when performing the scheduled operations. ### Claim 11 (depends on 9) The transceiver of claim 9, wherein the time threshold is at least 10 times the cycle of the discontinuous reception. ### Claim 12 (depends on 7) The transceiver of claim 7, wherein the controller is further arranged to, before disconnecting the transceiver from the cellular communication network, send an indication to the cellular communication network about a time for re-connecting next time. ### Claim 13 A non-transitory computer-readable medium comprising, stored thereon, a computer program comprising computer-executable instructions suitable for execution by a processor of a transceiver configured to operate in a cellular communication network employing a paging signal to allow discontinuous reception for communication devices, wherein the communication device is arranged for three main communication states, a detached state where the communication device is not registered to the cellular communication network, an idle state where the communication device is registered to the cellular communication network, and receives paging signals through discontinuous reception, and an active state where the communication device is registered to the cellular communication network and performs communication with the cellular communication network essentially continuously, wherein the computer-executable instructions are configured such that, when executed by the processor, the computer-executable instructions cause the transceiver to: send a detach request to the cellular communication network at disconnecting from the cellular communication network, and receive a detach accept from the cellular communication network, and perform a transition from the detached state to any of the idle state or the active state when reconnecting to the cellular communication network. ### Claim 14 (depends on 13) The non-transitory computer-readable medium of claim 13, wherein the computer-executable instructions are further configured so as to cause the transceiver to perform scheduled operations; and enter the power saving mode when activities in the active state are not imminent, and when disconnected, reconnect to the cellular communication network when a time for next operation in the active state or scheduled operations in the idle state is approaching. ### Claim 15 (depends on 13) The non-transitory computer-readable medium of claim 13, wherein the computer-executable instructions are further configured so as to cause the transceiver to condition the entering of the power saving mode upon the time until time for next operation in the active state or scheduled operations in the idle state being above a time threshold, while if the time until time for next operation in the active state is below the time threshold, the computer-executable instructions cause the transceiver to remain in the idle state. ### Claim 16 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the computer-executable instructions are configured so as to cause the transceiver to extract the information about time for next operation in active state or scheduled operations in the idle state from data information received when performing the scheduled operations. ### Claim 17 (depends on 15) The non-transitory computer-readable medium of claim 15, wherein the time threshold is at least 10 times the cycle of the discontinuous reception. ### Claim 18 (depends on 13) The non-transitory computer-readable medium of claim 13, wherein the computer-executable instructions are configured so as to cause the transceiver to disconnect from the cellular communication network by sending an indication to the cellular communication network about a time for re-connecting next time.