# US 2019/0357262 A1 · Random Access Procedures Using Multiple Active Bandwidth Parts > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0357262 A1 - Document ID: US20190357262A1 - Status: Published application - Kind: A1 - Application number: 16/418,476 - Filed: 2019-05-21 - Published: 2019-11-21 - Earliest claimed: 2018-05-21 - Assignees: Comcast Cable Communications, LLC - Applicants: Comcast Cable Communications, LLC - Inventors: Ali Cirik; Esmael Hejazi Dinan; Hua Zhou; Hyoungsuk Jeon; Alireza Babaei - Web page: https://patentgrep.com/patent/US20190357262A1 ## CPC - H04L 5/001: {the frequencies being arranged in component carriers} - H04W 72/04: Wireless resource allocation - H04L 5/0092: {Indication of how the channel is divided} - H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands} - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04W 74/02: Hybrid access - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 76/11: Allocation or use of connection identifiers - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 80/02: Data link layer protocols - H04W 74/0836: with 2-step access - H04W 74/0838: using contention-free random access [CFRA] - Y02D 30/70: in wireless communication networks - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - 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 Wireless communications using multiple active resources (e.g., bandwidth parts (BWP)) are described. A predetermined rule may be used to determine on which downlink (DL) BWP of multiple active DL BWPs, and/or on which uplink (UL) BWP of multiple active UL BWPs, a message is to be sent. A wireless device and/or a base station may reduce the quantity of active DL BWPs and/or active UL BWPs to monitor for a response. ## Claims ### Claim 1 A method comprising: receiving, by a wireless device, one or more configuration parameters for uplink bandwidth parts (BWPs) of a cell; activating at least two uplink BWPs of the uplink BWPs; initiating a random access procedure for the cell; based on determining that the at least two uplink BWPs are not configured with random access channel resources, determining a first uplink BWP of the at least two uplink BWPs; switching from the first uplink BWP to a second uplink BWP of the uplink BWPs; and sending, via the second uplink BWP, a preamble for the random access procedure. ### Claim 2 (depends on 1) The method of claim 1, further comprising: activating a first downlink BWP and a second downlink BWP of at least two downlink BWPs, wherein the first downlink BWP is associated with a first random access response (RAR) monitoring window and the second downlink BWP is associated with a second RAR monitoring window; and starting, based on sending the preamble, the first RAR monitoring window and the second RAR monitoring window for monitoring a random access response to the preamble. ### Claim 3 (depends on 2) The method of claim 2, further comprising: determining that the first RAR monitoring window and the second RAR monitoring window have expired; and sending, based on the determining, at least one second preamble. ### Claim 4 (depends on 1) The method of claim 1, wherein the one or more configuration parameters indicate a BWP-specific index for each of the uplink BWPs, and wherein the determining the first uplink BWP is based on a first BWP-specific index associated with the first uplink BWP. ### Claim 5 (depends on 1) The method of claim 1, wherein the determining the first uplink BWP comprises determining the first uplink BWP based on a highest or a lowest BWP-specific index relative to BWP-specific indexes of the at least two uplink BWPs. ### Claim 6 (depends on 1) The method of claim 1, wherein the determining the first uplink BWP comprises determining the first uplink BWP based on the first uplink being a primary uplink BWP. ### Claim 7 (depends on 1) The method of claim 1, wherein the determining the first uplink BWP comprises determining the first uplink BWP based on the first uplink being a secondary uplink BWP. ### Claim 8 (depends on 1) The method of claim 1, wherein the one or more configuration parameters indicate a BWP-specific numerology for each of the uplink BWPs, and wherein the determining the first uplink BWP comprises determining the first uplink BWP based on a highest or lowest BWP-specific numerology relative to BWP-specific numerologies of the at least two uplink BWPs. ### Claim 9 (depends on 1) The method of claim 1, further comprising: receiving the one or more configuration parameters for downlink BWPs of the cell; activating at least two downlink BWPs of the downlink BWPs; based on the determining that the at least two uplink BWPs are not configured with random access channel resources, determining a first downlink BWP of the at least two downlink BWPs; and switching from the first downlink BWP to a second downlink BWP of the downlink BWPs. ### Claim 10 A method comprising: receiving, by a wireless device, one or more configuration parameters for bandwidth parts (BWPs) of a cell; activating at least two BWPs of the BWPs; initiating a random access procedure for the cell; based on determining that the at least two BWPs are not configured with random access channel resources, determining a first BWP of the at least two BWPs; switching from the first BWP to a different BWP of the BWPs; and sending, via the different BWP, a preamble for the random access procedure. ### Claim 11 (depends on 10) The method of claim 10, wherein the first BWP comprises a first uplink BWP that is associated with a first random access response (RAR) monitoring window and a second BWP of the at least two BWPs comprises a second uplink BWP that is associated with a second RAR monitoring window, further comprising: starting, based on sending the preamble, the first RAR monitoring window and the second RAR monitoring window for monitoring a random access response to the preamble; determining that the first RAR monitoring window and the second RAR monitoring window have expired; and sending, based on the determining, at least one second preamble. ### Claim 12 (depends on 10) The method of claim 10, wherein the activating the at least two BWPs comprises: activating the first BWP in a first slot; and activating a second BWP of the at least two BWPs in a second slot. ### Claim 13 (depends on 10) The method of claim 10, wherein the one or more configuration parameters indicate a BWP-specific index for each of the at least two BWPs, and wherein the determining the first BWP is based on a first BWP-specific index associated with the first BWP. ### Claim 14 (depends on 10) The method of claim 10, wherein the determining the first BWP comprises determining the first BWP based on a highest or a lowest BWP-specific index relative to BWP-specific indexes of the at least two BWPs. ### Claim 15 (depends on 10) The method of claim 10, wherein the determining the first BWP comprises determining the first BWP based on the first BWP being a primary BWP. ### Claim 16 (depends on 10) The method of claim 10, wherein the determining the first BWP comprises determining the first BWP based on the first BWP being a secondary uplink BWP. ### Claim 17 (depends on 10) The method of claim 10, wherein the one or more configuration parameters indicate a BWP-specific numerology for each of the BWPs, and wherein the determining the first BWP comprises determining the first BWP based on a highest or lowest BWP-specific numerology relative to BWP-specific numerologies of the at least two BWPs. ### Claim 18 (depends on 10) The method of claim 10, wherein the at least two BWPs comprise at least two downlink BWPs and at least one uplink BWP. ### Claim 19 A method comprising: receiving, by a wireless device, one or more configuration parameters for a first BWP of a first cell and a second BWP of the first cell; activating the first BWP and the second BWP, wherein the first BWP is associated with a first random-access response (RAR) monitoring window and the second BWP is associated with a second RAR monitoring window; sending, via a second cell, at least one preamble for a random access procedure; starting, based on the sending the at least one preamble, the first RAR monitoring window and the second RAR monitoring window for monitoring a random access response to the at least one preamble; determining that the first RAR monitoring window and the second RAR monitoring window have expired; and sending, based on the determining, at least one second preamble. ### Claim 20 (depends on 19) The method of claim 19, further comprising switching, based on the determining, from the first BWP to a third BWP of the first cell.