Base stations and methods for receiving transmissions on an enhanced random access channel
First Claim
1. A method for receiving transmissions on an uplink contention-based random-access channel (RACH) from a device in a time-division multiple access (TDMA) communication system, the method comprising:
- transmitting by a base station, a notification of the uplink contention-based RACH, the notification including an identification of time-slots of TDMA frames that comprise the uplink contention-based RACH;
transmitting, by the base station, a shortened identifier to the device, the shortened identifier uniquely identifying the device within a cell; and
when no uplink bandwidth has been allocated for data transmission by the device, receiving, at the base station, an initial access burst from the device on the uplink contention-based RACH, the initial access burst including user traffic data and the shortened identifier, the user traffic data to be sent by the base station to a network destination different than the base station, the initial access burst sent by the device using a known timing advance greater than zero and determined at the device prior to a transmission of the initial access burst, wherein the initial access burst is transmitted at a time determined autonomously by the device in response to an upper level layer of the device requesting to send the user traffic data to the network destination when the device has no assigned resources.
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Accused Products
Abstract
Example base stations and methods for receiving transmissions on an enhanced random access channel (RACH) are disclosed herein. An example method for receiving transmissions on an enhanced RACH from a device such that an initial access burst is received in a single time slot from the device involves receiving the initial access burst from the device on the enhanced RACH. The initial access burst is sent by the device using a timing advance determined at the device. The initial access burst includes at least one of an identifier or user data. The enhanced RACH is a contention-based uplink-only channel requiring use of timing advances for transmissions thereon.
98 Citations
14 Claims
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1. A method for receiving transmissions on an uplink contention-based random-access channel (RACH) from a device in a time-division multiple access (TDMA) communication system, the method comprising:
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transmitting by a base station, a notification of the uplink contention-based RACH, the notification including an identification of time-slots of TDMA frames that comprise the uplink contention-based RACH; transmitting, by the base station, a shortened identifier to the device, the shortened identifier uniquely identifying the device within a cell; and when no uplink bandwidth has been allocated for data transmission by the device, receiving, at the base station, an initial access burst from the device on the uplink contention-based RACH, the initial access burst including user traffic data and the shortened identifier, the user traffic data to be sent by the base station to a network destination different than the base station, the initial access burst sent by the device using a known timing advance greater than zero and determined at the device prior to a transmission of the initial access burst, wherein the initial access burst is transmitted at a time determined autonomously by the device in response to an upper level layer of the device requesting to send the user traffic data to the network destination when the device has no assigned resources. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A non-transitory computer readable storage medium having instructions stored thereon that, when executed, cause a base station in a time-division multiple access (TDMA) communication system to perform operations comprising:
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transmitting a notification of an uplink contention-based random-access channel (RACH), the notification including an identification of time-slots of TDMA frames that comprise the uplink contention-based RACH; transmitting a shortened identifier to a device, the shortened identifier uniquely identifying the device within a cell; and when no uplink bandwidth has been allocated for data transmission by the device, receiving, at the base station, an initial access burst from the device on the uplink contention-based RACH, the initial access burst including user traffic data and the shortened identifier, the user traffic data to be sent by the base station to a network destination different than the base station, the initial access burst sent by the device using a known timing advance greater than zero and determined at the device prior to a transmission of the initial access burst, wherein the initial access burst is transmitted at a time determined autonomously by the device in response to an upper level layer of the device requesting to send the user traffic data to the network destination when the device has no assigned resources.
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11. A base station in a time-division multiple access (TDMA) communication system, the base station comprising:
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a memory; and at least one hardware processor communicatively coupled with the memory and configured to; transmit a notification of an uplink contention-based random-access channel (RACH), the notification including an identification of time-slots of TDMA frames that comprise the uplink contention-based RACH; transmit a shortened identifier to a device, the shortened identifier uniquely identifying the device within a cell; and when no uplink bandwidth has been allocated for data transmission by the device, receive, at the base station, an initial access burst from the device on the uplink contention-based RACH, the initial access burst including user traffic data and the shortened identifier, the user traffic data to be sent by the base station to a network destination different than the base station, the initial access burst sent by the device using a known timing advance greater than zero and determined at the device prior to a transmission of the initial access burst, wherein the initial access burst is transmitted at a time determined autonomously by the device in response to an upper level layer of the device requesting to send the user traffic data to the network destination when the device has no assigned resources. - View Dependent Claims (12, 13, 14)
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Specification