Random access procedure and broadcast prioritization for machine type communications (MTC)
First Claim
1. A method for wireless communications by a user equipment (UE), comprising:
- determining a plurality of subframes for use by the UE to transmit a bundled random access channel (RACH) preamble to a base station (BS);
determining at least one narrowband region of the plurality of subframes for transmitting the bundled RACH preamble;
determining a bundling size for the bundled RACH preamble based at least in part on a determined success or failure of the BS to successfully decode a previous bundled RACH preamble, the bundling size indicating a number of the plurality of subframes in which the bundled RACH preamble is transmitted;
transmitting the bundled RACH preamble in the at least one narrowband region of the plurality of subframes, based at least in part on the bundling size;
receiving a bundled random access response message from the BS;
determining a narrowband region of a contention resolution message from the BS based at least in part on a narrowband region of the bundled random access response message; and
receiving the contention resolution message from the BS on the determined narrowband region of the contention resolution message.
2 Assignments
0 Petitions
Accused Products
Abstract
Certain aspects of the present disclosure generally relate to wireless communications, and more specifically to random access procedures and/or prioritization of broadcast transmissions in machine type communications (MTC) devices and enhanced MTC (eMTC). An example method generally includes determining a plurality of subframes in which the UE may transmit a bundled random access channel (RACH) message to a base station (BS), determining, within the subframes, at least one narrowband region for transmitting the bundled RACH message, determining a bundling size for the bundled RACH message, the bundling size indicating a number of the plurality of subframes in which the bundled RACH message is transmitted, and transmitting the bundled RACH message in the narrowband region of the plurality of subframes, based at least in part on the determined bundling size.
13 Citations
34 Claims
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1. A method for wireless communications by a user equipment (UE), comprising:
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determining a plurality of subframes for use by the UE to transmit a bundled random access channel (RACH) preamble to a base station (BS); determining at least one narrowband region of the plurality of subframes for transmitting the bundled RACH preamble; determining a bundling size for the bundled RACH preamble based at least in part on a determined success or failure of the BS to successfully decode a previous bundled RACH preamble, the bundling size indicating a number of the plurality of subframes in which the bundled RACH preamble is transmitted; transmitting the bundled RACH preamble in the at least one narrowband region of the plurality of subframes, based at least in part on the bundling size; receiving a bundled random access response message from the BS; determining a narrowband region of a contention resolution message from the BS based at least in part on a narrowband region of the bundled random access response message; and receiving the contention resolution message from the BS on the determined narrowband region of the contention resolution message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for wireless communications, comprising:
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means for determining a plurality of subframes for use by the apparatus to transmit a bundled random access channel (RACH) preamble to a base station (BS); means for determining at least one narrowband region of the plurality of subframes for transmitting the bundled RACH preamble; means for determining a bundling size for the bundled RACH preamble based at least in part on a determined success or failure of the BS to successfully decode a previous bundled RACH preamble, the bundling size indicating a number of the plurality of subframes in which the bundled RACH preamble is transmitted; means for transmitting the bundled RACH preamble in the at least one narrowband region of the plurality of subframes, based at least in part on the bundling size; means for receiving a bundled random access response message from the BS; means for determining a narrowband region of a contention resolution message from the BS based at least in part on a narrowband region of the bundled random access response message; and means for receiving the contention resolution message from the BS on the determined narrowband region of the contention resolution message.
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17. An apparatus for wireless communications, comprising:
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at least one processor configured to; determine a plurality of subframes for use by the apparatus to transmit a bundled random access channel (RACH) preamble to a base station (BS); determine at least one narrowband region of the plurality of subframes for transmitting the bundled RACH preamble; and determine a bundling size for the bundled RACH preamble based at least in part on a determined success or failure of the BS to successfully decode a previous bundled RACH preamble, the bundling size indicating a number of the plurality of subframes in which the bundled RACH preamble is transmitted; a transmitter configured to transmit the bundled RACH preamble in the at least one narrowband region of the plurality of subframes, based at least in part on the bundling size; a receiver configured to; receive a bundled random access response message from the BS, wherein the at least one processor is further configured to determine a narrowband region of a contention resolution message from the BS based at least in part on a narrowband region of the bundled random access response message; and receive the contention resolution message from the BS on the determined narrowband region of the contention resolution message; and a memory coupled with the at least one processor.
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18. A non-transitory computer-readable medium for wireless communication by a user equipment (UE), the non-transitory computer-readable medium having computer executable code stored thereon, comprising:
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code for determining a plurality of subframes for use by the UE to transmit a bundled random access channel (RACH) preamble to a base station (BS); code for determining at least one narrowband region of the plurality of subframes for transmitting the bundled RACH preamble; code for determining a bundling size for the bundled RACH preamble based at least in part on a determined success or failure of the BS to successfully decode a previous bundled RACH preamble, the bundling size indicating a number of the plurality of subframes in which the bundled RACH preamble is transmitted; code for transmitting the bundled RACH preamble in the at least one narrowband region of the plurality of subframes, based at least in part on the bundling size; code for receiving a bundled random access response message from the BS; code for determining a narrowband region of a contention resolution message from the BS based at least in part on a narrowband region of the bundled random access response message; and code for receiving the contention resolution message from the BS on the determined narrowband region of the contention resolution message.
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19. A method for wireless communications by a base station (BS), comprising:
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determining a plurality of subframes for use by a user equipment (UE) to transmit a bundled random access channel (RACH) preamble to the BS; determining at least one narrowband region of the plurality of subframes for receiving the bundled RACH preamble; determining a bundling size for the bundled RACH preamble based at least in part on a determined success or failure of the BS to successfully decode a previous bundled RACH preamble, the bundling size indicating a number of the plurality of subframes in which the bundled RACH preamble is transmitted by the UE; receiving the bundled RACH preamble in the at least one narrowband region of the plurality of subframes, based at least in part on the bundling size; transmitting a bundled random access response message; determining a narrowband region of a contention resolution message from the BS based at least in part on a narrowband region of the bundled random access response message; and transmitting the contention resolution message on the determined narrowband region of the contention resolution message. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. An apparatus for wireless communications, comprising:
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means for determining a plurality of subframes for use by a user equipment (UE) to transmit a bundled random access channel (RACH) preamble to the apparatus; means for determining at least one narrowband region of the plurality of subframes for receiving the bundled RACH preamble; means for determining a bundling size for the bundled RACH preamble based at least in part on a determined success or failure of the apparatus to successfully decode a previous bundled RACH preamble, the bundling size indicating a number of the plurality of subframes in which the bundled RACH preamble is transmitted by the UE; means for receiving the bundled RACH preamble in the at least one narrowband region of the plurality of subframes, based at least in part on the bundling size; means for transmitting a bundled random access response message; means for determining a narrowband region of a contention resolution message from the BS based at least in part on a narrowband region of the bundled random access response message; and means for transmitting the contention resolution message on the determined narrowband region of the contention resolution message.
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33. An apparatus for wireless communications, comprising:
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at least one processor configured to; determine a plurality of subframes for use by a user equipment (UE) to transmit a bundled random access channel (RACH) preamble to the apparatus; determine at least one narrowband region of the plurality of subframes for receiving the bundled RACH preamble; and determine a bundling size for the bundled RACH preamble based at least in part on a determined success or failure of the apparatus to successfully decode a previous bundled RACH preamble, the bundling size indicating a number of the plurality of subframes in which the bundled RACH preamble is transmitted by the UE; a receiver configured to receive the bundled RACH preamble in the at least one narrowband region of the plurality of subframes, based at least in part on the bundling size; a transmitter configured to; transmit a bundled random access response message, wherein the at least one processor is further configured to determine a narrowband region of a contention resolution message from the apparatus based at least in part on a narrowband region of the bundled random access response message; and transmit the contention resolution message on the determined narrowband region of the contention resolution message; and a memory coupled with the at least one processor.
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34. A non-transitory computer-readable medium for wireless communications by a base station (BS), the non-transitory computer-readable medium having computer executable code stored thereon, comprising:
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code for determining a plurality of subframes for use by a user equipment (UE) to transmit a bundled random access channel (RACH) preamble to the BS; code for determining at least one narrowband region of the plurality of subframes for receiving the bundled RACH preamble; code for determining a bundling size for the bundled RACH preamble based at least in part on a determined success or failure of the BS to successfully decode a previous bundled RACH preamble, the bundling size indicating a number of the plurality of subframes in which the bundled RACH preamble is transmitted by the UE; code for receiving the bundled RACH preamble in the at least one narrowband region of the plurality of subframes, based at least in part on the bundling size; code for transmitting a bundled random access response message; code for determining a narrowband region of a contention resolution message from the BS based at least in part on a narrowband region of the bundled random access response message; and code for transmitting the contention resolution message on the determined narrowband region of the contention resolution message.
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Specification