System type dependent master information block (MIB)
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine a duplexing configuration (e.g., frequency division duplexing (FDD) or time division duplexing (TDD)) of a carrier based on one or more synchronization signals. The UE may then receive a master information block (MIB) on the carrier, and may interpret one or more fields of the MIB based on the duplexing configuration of the carrier. The configuration dependent fields may include a special subframe field, a system information location field, or both. In some cases, such as in a TDD configuration, the UE may postulate a special subframe configuration of the carrier in order to receive the MIB, and may update the postulated special subframe configuration after receiving the MIB.
1. A method of wireless communication, comprising:
determining a duplexing configuration of a carrier, wherein the duplexing configuration comprises one of a time division duplex (TDD) configuration, a frequency division duplex (FDD), or an unlicensed spectrum configuration;
in response to a determination that the duplexing configuration is the TDD configuration, postulating a special subframe configuration based at least in part on the TDD configuration of the carrier;
receiving a master information block (MIB) on the carrier, wherein the MIB is received according to the postulated special subframe configuration; and
interpreting at least one field of the MIB based at least in part on the duplexing configuration of the carrier.
2. The method of claim 1 , wherein the at least one field of the MIB comprises a special subframe configuration.
3. The method of claim 1 , wherein the at least one field of the MIB comprises one of an indication of a system information block (SIB) location field or an indication of a number of repetitions of the SIB location field.
4. The method of claim 1 , wherein the postulated special subframe configuration comprises an eleven-symbol downlink pilot time slot (DwPTS), a nine-symbol DwPTS, a one-symbol guard period, a two-symbol uplink pilot time slot (UpPTS), or any combination thereof.
5. The method of claim 1 , further comprising:
updating the postulated special subframe configuration based at least in part on the received MIB.
6. The method of claim 1 , further comprising:
receiving one or more synchronization signals, wherein the duplexing configuration is determined based at least in part on the one or more synchronization signals.
7. The method of claim 1 , wherein the at least one field of the MIB comprises a duplex configuration-specific field.
8. The method of claim 2 , wherein the special subframe configuration comprises a reduced downlink pilot time slots (DwPTS) set.
9. The method of claim 3 , wherein the SIB location field is indicative of one or more downlink (DL) subframe options for SIB1.
10. An apparatus for wireless communication, comprising:
one or more processors;
memory in electronic communication with the one or more processors; and
instructions stored in the memory and operable, when executed by the one or more processors, to cause the apparatus to:
determine a duplexing configuration of a carrier, wherein the duplexing configuration comprises one of a time division duplex (TDD) configuration, a frequency division duplex (FDD), or an unlicensed spectrum configuration;
in response to a determination that the duplexing configuration is the TDD configuration, postulate a special subframe configuration based at least in part on the TDD configuration of the carrier;
receive a master information block (MIB) on the carrier, wherein the MIB is received according to the postulated special subframe configuration; and
interpret at least one field of the MIB based at least in part on the duplexing configuration of the carrier.
11. The apparatus of claim 10 , wherein the at least one field of the MIB comprises a special subframe configuration.
12. The apparatus of claim 10 , wherein the at least one field of the MIB comprises one of an indication of a system information block (SIB) location field or an indication of a number of repetitions of the SIB location field.
13. The apparatus of claim 10 , wherein the postulated special subframe configuration comprises an eleven-symbol downlink pilot time slot (DwPTS), a nine-symbol DwPTS, a one-symbol guard period, a two-symbol uplink pilot time slot (UpPTS), or any combination thereof.
14. The apparatus of claim 10 , wherein the instructions are operable, when executed by the one or more processors, to cause the apparatus to update the postulated special subframe configuration based at least in part on the received MIB.
15. The apparatus of claim 10 , wherein the instructions are operable, when executed by the one or more processors, to cause the apparatus to receive one or more synchronization signals, wherein the duplexing configuration is determined based at least in part on the one or more synchronization signals.
16. The apparatus of claim 10 , wherein the at least one field of the MIB comprises a duplex configuration-specific field.
17. The apparatus of claim 11 , wherein the special subframe configuration comprises a reduced downlink pilot time slots (DwPTS) set.
18. The apparatus of claim 12 , wherein the SIB location field is indicative of one or more downlink (DL) subframe options for SIB1.