Uplink transmission control with clear channel assessment
First Claim
1. A method of wireless communication at a User Equipment (UE), comprising:
- receiving, at the UE, a pre-grant assignment directed to the UE having uplink data for transmission, wherein the pre-grant assignment indicates first resources assigned to the UE by a base station for the UE to transmit a preamble on a contention-based secondary component carrier (SCC), and wherein the pre-grant assignment indicates first resources that are UE specific for the UE to transmit the preamble on the contention-based SCC;
performing a clear channel assessment (CCA) operation on the contention-based SCC based on the pre-grant assignment;
transmitting a preamble on the contention-based SCC based on the pre-grant assignment when the CCA operation succeeds, the preamble uniquely identifying the UE;
receiving a grant confirmation in response to the preamble transmission, wherein the grant confirmation corresponds to data transmission and wherein the grant confirmation is signaled to the UE separately from the pre-grant assignment; and
transmitting or refraining from transmitting the uplink data according to the grant confirmation received from the base station.
1 Assignment
0 Petitions
Accused Products
Abstract
A method, an apparatus, and a computer program product for wireless communication are provided. An eNB transmits pre-grant(s) to a UE(s) for a target resource on a contention-based carrier. In response, the UE(s) perform a CCA/eCCA and, when successful, transmit a preamble to the eNB based on the pre-grant. The eNB detects the preamble(s) and transmits grant confirmation(s) to the UE(s) for which a preamble was detected. The grant confirmation(s) may modify the pre-grant(s). The eNB may overschedule a target resource and based on the received preambles may transmit grant confirmation(s) that instruct a portion of the UEs for which a preamble was received to transmit data on a target resource and may instruct the remaining portion of the UEs for which a preamble was received to cease or modify data transmission.
-
Citations
33 Claims
-
1. A method of wireless communication at a User Equipment (UE), comprising:
-
receiving, at the UE, a pre-grant assignment directed to the UE having uplink data for transmission, wherein the pre-grant assignment indicates first resources assigned to the UE by a base station for the UE to transmit a preamble on a contention-based secondary component carrier (SCC), and wherein the pre-grant assignment indicates first resources that are UE specific for the UE to transmit the preamble on the contention-based SCC; performing a clear channel assessment (CCA) operation on the contention-based SCC based on the pre-grant assignment; transmitting a preamble on the contention-based SCC based on the pre-grant assignment when the CCA operation succeeds, the preamble uniquely identifying the UE; receiving a grant confirmation in response to the preamble transmission, wherein the grant confirmation corresponds to data transmission and wherein the grant confirmation is signaled to the UE separately from the pre-grant assignment; and transmitting or refraining from transmitting the uplink data according to the grant confirmation received from the base station. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A user equipment (UE), comprising:
-
means for receiving, at the UE, a pre-grant assignment directed to the UE having uplink data for transmission, wherein the pre-grant assignment indicates first resources assigned to the UE by a base station for the UE to transmit a preamble on a contention-based secondary component carrier (SCC), and wherein the pre-grant assignment indicates first resources that are UE specific for the UE to transmit the preamble on the contention-based SCC; means for performing a clear channel assessment (CCA) operation on the contention-based SCC based on the pre-grant assignment; means for transmitting a preamble on the contention-based SCC based on the pre-grant assignment when the CCA operation succeeds, the preamble uniquely identifying the UE; means for receiving a grant confirmation in response to the preamble transmission, wherein the grant confirmation corresponds to data transmission and wherein the grant confirmation is signaled to the UE separately from the pre-grant assignment; and means for transmitting or refraining from transmitting the uplink data according to the grant confirmation received from the base station. - View Dependent Claims (9, 10, 11)
-
-
12. A user equipment (UE), comprising:
-
a memory; and at least one processor coupled to the memory and configured to; receive, at the UE, a pre-grant assignment directed to the UE having uplink data for transmission, wherein the pre-grant assignment indicates first resources assigned to the UE by a base station for the UE to transmit a preamble on a contention-based secondary component carrier (SCC), and wherein the pre-grant assignment indicates first resources that are UE specific for the UE to transmit the preamble on the contention-based SCC; perform a clear channel assessment (CCA) operation on the contention-based SCC based on the pre-grant assignment; transmit a preamble on the contention-based SCC based on the pre-grant assignment when the CCA operation succeeds, the preamble uniquely identifying the UE; receive a grant confirmation in response to the preamble transmission, wherein the grant confirmation corresponds to data transmission and wherein the grant confirmation is signaled to the UE separately from the pre-grant assignment; and transmit or refraining from transmitting the uplink data according to the grant confirmation received from the base station. - View Dependent Claims (13, 14, 15)
-
-
16. A non-transitory computer-readable medium storing computer executable code for wireless communication, comprising code to:
-
receive, at the UE, a pre-grant assignment directed to the UE having uplink data for transmission, wherein the pre-grant assignment indicates first resources assigned to the UE by a base station for the UE to transmit a preamble on a contention-based secondary component carrier (SCC), and wherein the pre-grant assignment indicates first resources that are UE specific for the UE to transmit the preamble on the contention-based SCC; perform a clear channel assessment (CCA) operation on the contention-based SCC based on the pre-grant assignment; transmit a preamble on the contention-based SCC based on the pre-grant assignment when the CCA operation succeeds, the preamble uniquely identifying the UE; receive a grant confirmation in response to the preamble transmission, wherein the grant confirmation corresponds to data transmission and wherein the grant confirmation is signaled to the UE separately from the pre-grant assignment; and transmit or refraining from transmitting the uplink data according to the grant confirmation received from the base station. - View Dependent Claims (17, 18, 19)
-
-
20. A method of wireless communication, comprising:
-
transmitting one or more pre-grant assignments each pre-grant assignment being UE specific and directed to a user equipment (UE) having uplink data for transmission from among a set of UEs, the set including one or more UE, wherein each pre-grant assignment indicates resources assigned to the corresponding UE to transmit a preamble on a contention-based secondary component carrier (SCC); detecting one or more preamble transmissions on a contention based carrier in response to the transmission of the one or more pre-grant assignments; and transmitting one or more grant confirmation assignments in response to the detected one or more preamble transmissions, wherein each grant confirmation assignment corresponds to uplink data transmission from the corresponding UE, and wherein each grant confirmation is signaled to the corresponding UE separately from the pre-grant assignment for the corresponding UE. - View Dependent Claims (21, 22, 23, 24)
-
-
25. A base station, comprising:
-
means for transmitting one or more pre-grant assignments each pre-grant assignment being UE specific and directed to a user equipment (UE) having uplink data for transmission from among a set of UEs, the set including one or more UE, wherein each pre-grant assignment indicates resources assigned to the corresponding UE to transmit a preamble on a contention-base secondary component carrier (SCC); means for detecting one or more preamble transmissions on a contention based carrier in response to the transmission of the one or more pre-grant assignments; and means for transmitting one or more grant confirmation assignments in response to the detected one or more preamble transmissions, wherein each grant confirmation assignment corresponds to uplink data transmission from the corresponding UE, and wherein each grant confirmation is signaled to the corresponding UE separately from the pre-grant assignment for the corresponding UE. - View Dependent Claims (26, 27)
-
-
28. A base station, comprising:
-
a memory; and at least one processor coupled to the memory and configured to; transmit one or more pre-grant assignments each pre-grant assignment being UE specific and directed to a user equipment (UE) having uplink data for transmission from among a set of UEs, the set including one or more UE, wherein each pre-grant assignment indicates resources assigned to the corresponding UE to transmit a preamble on a contention-based secondary component carrier (SCC); detect one or more preamble transmissions on a contention based carrier in response to the transmission of the one or more pre-grant assignments; and transmit one or more grant confirmation assignments in response to the detected one or more preamble transmissions, wherein each grant confirmation assignment corresponds to uplink data transmission from the corresponding UE, and wherein each grant confirmation is signaled to the corresponding UE separately from the pre-grant assignment for the corresponding UE. - View Dependent Claims (29, 30)
-
-
31. A non-transitory computer-readable medium storing computer executable code, comprising code to:
-
transmit one or more pre-grant assignments each pre-grant assignment being UE specific and directed to a user equipment (UE) having uplink data for transmission from among a set of UEs, the set including one or more UE, wherein each pre-grant assignment indicates resources assigned to the corresponding UE to transmit a preamble on a contention-based secondary component carrier (SCC); detect one or more preamble transmissions on a contention based carrier in response to the transmission of the one or more pre-grant assignments; and transmit one or more grant confirmation assignments in response to the detected one or more preamble transmissions, wherein each grant confirmation assignment corresponds to uplink data transmission from the corresponding UE, and wherein each grant confirmation is signaled to the corresponding UE separately from the pre-grant assignment for the corresponding UE. - View Dependent Claims (32, 33)
-
Specification