# US 11,122,541 B2 · Methods and apparatus for power saving in broadcasting carrier information > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,541 B2 - Document ID: US11122541B2 - Status: Granted - Kind: B2 - Application number: 16/836,460 - Filed: 2020-03-31 - Published: 2020-09-10 - Granted: 2021-09-14 - Earliest claimed: 2012-07-12 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Hao Xu; Tao Luo; Tingfang Ji; Wanshi Chen; Peter Gaal; Yongbin Wei; Gavin Bernard Horn - Web page: https://patentgrep.com/patent/US11122541B2 ## CPC - H04W 72/30: Resource management for broadcast services - H04W 52/0206: {in access points, e.g. base stations} - H04W 48/12: using downlink control channel - H04W 48/14: using user query {or user detection} - Y02B 70/30: Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level - 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) - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS - 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 The described aspects include methods and apparatus for activating a transmitter to communicate in a wireless network. A small cell can determine to activate the transmitter to serve user equipment (UE) in a wireless network. The small cell can then broadcast a portion of a set of broadcast signals in a radio frame and broadcast a remaining portion of the set of broadcast signals along with the portion of the set of broadcast signals in a subsequent radio frame. By refraining from immediately broadcasting all broadcast signals, the small cell can mitigate interference to other small cells. In addition, a UE can determine whether to generate random access channel (RACH) sequences for proximity determination or uplink timing synchronization based on parameters received in a RACH order. Moreover, a small cell with an active transmitter can decode discovery signals from a device to facilitate handover determination. ## Claims ### Claim 1 A method for utilizing a random access channel (RACH) process, comprising: receiving a RACH order from a source node for communicating to a target node; determining one or more parameters received from the source node related to transmitting according to the RACH order; and transmitting a RACH preamble to the target node based on the one or more parameters. ### Claim 2 (depends on 1) The method of claim 1, further comprising receiving the one or more parameters in the RACH order. ### Claim 3 (depends on 1) The method of claim 1, further comprising receiving the one or more parameters in a radio resource control message from the source node, wherein the RACH order indicates whether to use the one or more parameters. ### Claim 4 (depends on 1) The method of claim 1, wherein the one or more parameters correspond to a RACH configuration, a RACH sequence, an initial RACH transmit power, or an initial RACH timing offset. ### Claim 5 An apparatus for utilizing a random access channel (RACH) process, comprising: a processor; a memory in electronic communication with the processor; instructions stored in the memory, the instructions being executable by the processor to: receive a RACH order from a source node for communicating to a target node; determine one or more parameters received from the source node related to transmitting according to the RACH order; and transmit a RACH preamble to the target node based on the one or more parameters. ### Claim 6 (depends on 5) The apparatus of claim 5, the instructions being further executable by the processor to receive the one or more parameters in the RACH order. ### Claim 7 (depends on 5) The apparatus of claim 5, the instructions being further executable by the processor to receive the one or more parameters in a radio resource control message from the source node, wherein the RACH order indicates whether to use the one or more parameters. ### Claim 8 (depends on 5) The apparatus of claim 5, wherein the one or more parameters correspond to a RACH configuration, a RACH sequence, an initial RACH transmit power, or an initial RACH timing offset. ### Claim 9 An apparatus for utilizing a random access channel (RACH) process, comprising: means for receiving a RACH order from a source node for communicating to a target node; means for determining one or more parameters received from the source node related to transmitting according to the RACH order; and means for transmitting a RACH preamble to the target node based on the one or more parameters. ### Claim 10 (depends on 9) The apparatus of claim 9, further comprising means for receiving the one or more parameters in the RACH order. ### Claim 11 (depends on 9) The apparatus of claim 9, further comprising means for receiving the one or more parameters in a radio resource control message from the source node, wherein the RACH order indicates whether to use the one or more parameters. ### Claim 12 (depends on 9) The apparatus of claim 9, wherein the one or more parameters correspond to a RACH configuration, a RACH sequence, an initial RACH transmit power, or an initial RACH timing offset. ### Claim 13 A non-transitory computer-readable medium comprising code executable by a processor for utilizing a random access channel (RACH) process, the code comprising: code for causing at least one computer to receive a RACH order from a source node for communicating to a target node; code for causing the at least one computer to determine one or more parameters received from the source node related to transmitting according to the RACH order; and code for causing the at least one computer to transmit a RACH preamble to the target node based on the one or more parameters. ### Claim 14 (depends on 13) The non-transitory computer-readable medium of claim 13, further comprising code for receiving the one or more parameters in the RACH order. ### Claim 15 (depends on 13) The non-transitory computer-readable medium of claim 13, further comprising code for receiving the one or more parameters in a radio resource control message from the source node, wherein the RACH order indicates whether to use the one or more parameters. ### Claim 16 (depends on 13) The non-transitory computer-readable medium of claim 13, wherein the one or more parameters correspond to a RACH configuration, a RACH sequence, an initial RACH transmit power, or an initial RACH timing offset.