Control-less operation for coverage limited machine-type-communications
Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to techniques for control-less operation for machine-type communications (MTC).
1. A method for wireless communication by a user equipment (UE), comprising:
receiving a machine-type communication (MTC) system information block (SIB) message from a network entity;
determining a random access channel (RACH) sequence indicating a coverage limitation of the UE to be sent in a transmission time interval (TTI) bundle based on the MTC SIB message; and
transmitting the RACH sequence as a narrowband transmission within one resource block (RB) in each of a plurality of TTIs of the TTI bundle based at least in part on the determining.
2. The method of claim 1 , wherein a location of the one RB is a function of a cell ID.
3. The method of claim 1 , wherein the RACH sequence is a function of a cell ID.
4. The method of claim 1 , further comprising:
receiving synchronization signals; and
transmitting the RACH sequence based at least in part on the synchronization signals.
5. A method for wireless communication by a network entity, comprising:
sending a machine-type communication (MTC) system information block (SIB) message; and
receiving a random access channel (RACH) sequence indicating a coverage limitation of a user equipment (UE) as a narrowband transmission within one resource block (RB) in each of a plurality of transmission time intervals (TTIs) of a TTI bundle, wherein the RACH sequence is determined based on the MTC SIB.
6. The method of claim 5 , wherein a location of the one RB is a function of a cell ID.
7. The method of claim 5 , wherein the RACH sequence is a function of a cell ID.
8. The method of claim 5 , further comprising:
sending synchronization signals; and
receiving the RACH sequence based at least in part on the synchronization signals.
9. An apparatus for wireless communication by a user equipment (UE), comprising:
one or more processors configured to execute instructions stored on one or more memories to cause the UE to:
receive a machine-type communication (MTC) system information block (SIB) message from a network entity;
determine a random access channel (RACH) sequence indicating a coverage limitation of the UE to be sent in a transmission time interval (TTI) bundle based on the MTC SIB message; and
transmit the RACH sequence as a narrowband transmission within one resource block (RB) in each of a plurality of TTIs of the TTI bundle based at least in part on the determining.
10. The apparatus of claim 9 , wherein a location of the one RB is a function of a cell ID.
11. The apparatus of claim 9 , wherein the RACH sequence is a function of a cell ID.
12. The apparatus of claim 9 , wherein the one or more processors are further configured to cause the UE to:
receive synchronization signals; and
transmit the RACH sequence based at least in part on the synchronization signals.
13. An apparatus for wireless communication by a network entity, comprising:
one or more processors configured to execute instructions stored on one or more memories to cause the network entity to:
send a machine-type communication (MTC) system information block (SIB) message; and
receive a random access channel (RACH) sequence indicating a coverage limitation of a user equipment (UE) as a narrowband transmission within one resource block (RB) in each of a plurality of transmission time intervals (TTIs) of a TTI bundle, wherein the RACH sequence is determined based on the MTC SIB.
14. The apparatus of claim 13 , wherein a location of the one RB is a function of a cell ID.
15. The apparatus of claim 13 , wherein the RACH sequence is a function of a cell ID.
16. The apparatus of claim 13 , wherein the one or more processors are further configured to cause the network entity to:
send synchronization signals; and
receive the RACH sequence based at least in part on the synchronization signals.
17. An apparatus for wireless communication, comprising:
means for receiving a machine-type communication (MTC) system information block (SIB) message from a network entity;
means for determining a random access channel (RACH) sequence indicating a coverage limitation of a user equipment (UE) to be sent in a transmission time interval (TTI) bundle based on the MTC SIB message; and
means for transmitting the RACH sequence as a narrowband transmission within one resource block (RB) in each of a plurality of TTIs of the TTI bundle based at least in part on the determining.
18. An apparatus for wireless communication, comprising:
means for sending a machine-type communication (MTC) system information block (SIB) message; and
means for receiving a random access channel (RACH) sequence indicating a coverage limitation of a user equipment (UE) as a narrowband transmission within one resource block (RB) in each of a plurality of transmission time intervals (TTIs) of a TTI bundle, wherein the RACH sequence is determined based on the MTC SIB.
19. A non-transitory computer-readable medium for wireless communication by a user equipment (UE), comprising:
instruction that, when executed by one or more processors of the UE, cause the UE to:
receive a machine-type communication (MTC) system information block (SIB) message from a network entity;
determine a random access channel (RACH) sequence indicating a coverage limitation of a user equipment (UE) to be sent in a transmission time interval (TTI) bundle based on the MTC SIB message; and
transmit the RACH sequence as a narrowband transmission within one resource block (RB) in each of a plurality of TTIs of the TTI bundle based at least in part on the determining.
20. A non-transitory computer-readable medium for wireless communication by a network entity, comprising:
instruction that, when executed by one or more processors of the network entity, cause the network entity to:
send a machine-type communication (MTC) system information block (SIB) message; and
receive a random access channel (RACH) sequence indicating a coverage limitation of a user equipment (UE) as a narrowband transmission within one resource block (RB) in each of a plurality of transmission time intervals (TTIs) of a TTI bundle, wherein the RACH sequence is determined based on the MTC SIB.