# US 2020/0288472 A1 · Coordinated wireless communications using multiple transmission time intervals > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0288472 A1 - Document ID: US20200288472A1 - Status: Published application - Kind: A1 - Application number: 16/883,914 - Filed: 2020-05-26 - Published: 2020-09-10 - Earliest claimed: 2015-04-15 - Assignees: QUALCOMM Incorporated - Applicants: QUALCOMM Incorporated - Inventors: Wanshi Chen; Shimman Arvind Patel; Peter Gaal; Hao Xu - Web page: https://patentgrep.com/patent/US20200288472A1 ## CPC - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04B 7/2628: {using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] (H04B7/2618 takes precedence)} - H04L 5/0023: {Time-frequency-space} - H04L 5/0035: {Resource allocation in a cooperative multipoint environment} - H04W 72/20: Control channels or signalling for resource management - H04W 36/00692: {using simultaneous multiple data streams, e.g. cooperative multipoint [CoMP], carrier aggregation [CA] or multiple input multiple output [MIMO] (allocation of physical resources in CoMP or in CA H04L5/0035)} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Coordinated wireless communications using multiple transmission time intervals (TTIs) are described. Multiple TTIs may include a first TTI and a second TTI, the second TTI having a shorter duration than the first TTI. One or more parameters may be determined for communications using the first TTI and the second TTI. A first parameter of the determined parameters for the second TTI may be associated or linked with a corresponding parameter of the first TTI, and communications using the first TTI or the second TTI may be performed using the first parameter. Wireless network nodes using the first TTI may form a CoMP cooperating set, and wireless network nodes using the second TTI may for another CoMP cooperating set, and the first parameter may be applied to each of the CoMP cooperating sets. ## Claims ### Claim 1 A method for wireless communication, comprising: determining, in a system that supports communications with a first cell using a first transmission time interval (TTI) duration and communications with a second cell using a second TTI duration that is shorter than the first TTI duration, a first quasi-co-location configuration for the communications with the first cell using the first TTI duration; determining a second quasi-co-location configuration for the communications with the second cell using the second TTI duration; identifying an association between a first quasi-co-location indication of the first quasi-co-location configuration for the communications with the first cell using the first TTI duration and a second quasi-co-location indication of the second quasi-co-location configuration for the communications with the second cell using the second TTI duration; and performing communications using at least one of the first TTI duration or the second TTI duration, the communications based at least in part on identifying the association. ### Claim 2 (depends on 1) The method of claim 1, wherein the quasi-co-location configuration for communications using the second TTI is a same quasi-co-location configuration as for communications using the first TTI. ### Claim 3 (depends on 1) The method of claim 1, where a number of quasi-co-location configurations for communications using the second TTI is less than or equal to a number of quasi-co-location configurations for communications using the first TTI. ### Claim 4 (depends on 3) The method of claim 3, wherein, for a data communication, the quasi-co-location configuration using the second TTI or the first TTI is determined by a signaling in a control channel. ### Claim 5 (depends on 3) The method of claim 3, wherein, for a control channel communication, a first quasi-co-location configuration is determined for a first decoding candidate, and a second quasi-co-location configuration is determined for a second decoding candidate. ### Claim 6 (depends on 1) The method of claim 1, further comprising: receiving a radio resource control signaling indicating a set of quasi-co-location states, wherein the quasi-co-location configuration for communications using the first TTI, or the second TTI, or both, comprise the set of quasi-co-location states. ### Claim 7 (depends on 1) The method of claim 1, wherein identifying the association comprises: identifying that a reference signal port is common between the quasi-co-location configuration for the communications with the first cell and the quasi-co-location configuration for the communications with the second cell. ### Claim 8 (depends on 1) The method of claim 1, wherein the first quasi-co-location indication, or the second quasi-co-location indication, or both, comprise an assumption with respect to one or more of delay spread, Doppler spread, Doppler shift, or average delay. ### Claim 9 (depends on 1) The method of claim 1, wherein identifying the association comprises: identifying that a reference signal of the quasi-co-location configuration for the communications with the first cell is quasi co-located, within a subframe, with a reference signal of the quasi-co-location configuration for the communications with the second cell with respect to delay spread, receive power, frequency shift, Doppler spread, or receive timing. ### Claim 10 (depends on 1) The method of claim 1, wherein identifying the association comprises: identifying that a starting symbol for a physical downlink shared channel is common between the quasi-co-location configuration for the communications with the first cell and the quasi-co-location configuration for the communications with the second cell. ### Claim 11 (depends on 1) The method of claim 1, further comprising: identifying that a TTI having the second TTI duration coincides with a data region of a TTI having the first TTI duration; and performing the communications using the second TTI based at least in part on the identifying. ### Claim 12 (depends on 1) The method of claim 1, further comprising: receiving a radio resource control configuration, wherein identifying the association between the first parameter and the second parameter is based at least in part on the radio resource control configuration. ### Claim 13 (depends on 1) The method of claim 1, further comprising: performing cell switching based at least in part on identifying the association between the first parameter and the second parameter. ### Claim 14 (depends on 1) The method of claim 1, wherein a virtual cell identity (VCID) configuration for communications using the second TTI is associated with a VCID configuration for communications using the first TTI. ### Claim 15 (depends on 14) The method of claim 14, wherein for a data communication the VCID using the second TTI or the first TTI is determined by signaling in a control channel. ### Claim 16 (depends on 14) The method of claim 14, wherein for a control channel communication for a first VCID is determined for a first decoding candidate, and for a control channel communication for a second VCID is determined for a second decoding candidate. ### Claim 17 (depends on 1) The method of claim 1, wherein identifying the association comprises: identifying an association between a parameter for a CSI process for the second TTI duration and a corresponding parameter for a corresponding CSI process for the first TTI duration, the communication further based at least in part on the identified association between the parameter for the CSI process and the corresponding parameter for the corresponding CSI process. ### Claim 18 An apparatus for communication, comprising: a processor; memory in electronic communication with the processor; and instructions stored in the memory; wherein the instructions are executable by the processor to cause the apparatus to: determine, in a system that supports communications with a first cell using a first transmission time interval (TTI) duration and communications with a second cell using a second TTI duration that is shorter than the first TTI duration, a first quasi-co-location configuration for the communications with the first cell using the first TTI duration; determine a second quasi-co-location configuration for the communications with the second cell using the second TTI duration; identify an association between a first quasi-co-location indication of the first quasi-co-location configuration for the communications with the first cell using the first TTI duration and a second quasi-co-location indication of the second quasi-co-location configuration for the communications with the second cell using the second TTI duration; and perform communications using at least one of the first TTI duration or the second TTI duration, the communications based at least in part on identifying the association. ### Claim 19 (depends on 18) The apparatus of claim 18, wherein a virtual cell identity (VCID) configuration for communications using the second TTI is associated with a VCID configuration for communications using the first TTI. ### Claim 20 An apparatus for communication, comprising: means for determining, in a system that supports communications with a first cell using a first transmission time interval (TTI) duration and communications with a second cell using a second TTI duration that is shorter than the first TTI duration, a first quasi-co-location configuration for the communications with the first cell using the first TTI duration; means for determining a second quasi-co-location configuration for the communications with the second cell using the second TTI duration; means for identifying an association between a first quasi-co-location indication of the first quasi-co-location configuration for the communications with the first cell using the first TTI duration and a second quasi-co-location indication of the second quasi-co-location configuration for the communications with the second cell using the second TTI duration; and means for performing communications using at least one of the first TTI duration or the second TTI duration, the communications based at least in part on identifying the association.