Transmission of physical broadcast channel (PBCH) contents
Technology for transmitting physical broadcast channel (PBCH) contents is disclosed. An evolved node B (eNB) may configure one or more repetitions of PBCH content for transmission, to a user equipment (UE), from a cell at a selected time interval. The eNB may select a scrambling code for the one or more repetitions of PBCH content transmitted from the cell. The eNB may apply the scrambling code to one or more repetitions of PBCH content.
1. An apparatus of an eNodeB operable to generate physical broadcast channel (PBCH) content, the apparatus comprising one or more processors and memory configured to:
generate, at the eNodeB, one or more repetitions of PBCH content for transmission to a user equipment (UE);
select, at the eNodeB, a scrambling code for the one or more repetitions of PBCH content for transmission from the eNodeB; and
apply, at the eNodeB, the scrambling code to the one or more repetitions of PBCH content.
2. The apparatus of claim 1 , further comprising a transceiver configured to transmit the one or more repetitions of PBCH content to the UE.
3. The apparatus of claim 1 , wherein the one or more processors and memory are further configured to select the scrambling code based on a physical cell identifier (ID).
4. The apparatus of claim 1 , wherein the PBCH content includes modified physical broadcast channel (mPBCH) content.
5. The apparatus of claim 1 , wherein each repetition of PBCH content is transmitted from the eNodeB to the UE in a slot of a subframe.
6. The apparatus of claim 1 , wherein the one or more processors and memory are further configured to scramble bits included in the one or more repetitions of PBCH content according to {tilde over (b)} m (i)=(b(i)+c m (i)mod2, wherein c m (i) is a scrambling sequence and is initialized with c init m =f(N ID cell ) in each radio frame fulfilling n f mod4=0, wherein {tilde over (b)} m (i) in represents a block of scrambled bits and b(i) represents a block of bits.
7. The apparatus of claim 1 , wherein the UE is operable to perform machine type communication (MTC).
8. An apparatus of a user equipment (UE) operable to receive physical broadcast channel (PBCH) content, the apparatus comprising one or more processors and memory configured to:
process, at the UE, one or more repetitions of PBCH content received from an eNodeB, wherein the one or more repetitions of PBCH content are generated at the eNodeB for transmission to the UE,
wherein a scrambling code is applied to the one or more repetitions of PBCH content prior to transmission from the eNodeB to the UE,
wherein the apparatus comprises a transceiver configured to receive the one or more repetitions of PBCH content from the eNodeB at a selected time interval.
9. The apparatus of claim 8 , wherein the PBCH content includes modified physical broadcast channel (mPBCH) content.
10. The apparatus of claim 8 , wherein the transceiver is configured to receive each repetition of PBCH content in a slot of a subframe.
11. The apparatus of claim 8 , wherein the UE is operable to perform machine type communication (MTC).
12. The apparatus of claim 8 , wherein the UE includes an antenna, a touch sensitive display screen, a speaker, a microphone, a graphics processor, an application processor, an internal memory, or a non-volatile memory port.
13. At least one non-transitory machine readable storage medium having instructions embodied thereon for generating physical broadcast channel (PBCH) content from an eNodeB, the instructions when executed perform the following:
generating, using one or more processors at the eNodeB, one or more repetitions of PBCH content for transmission to a user equipment (UE);
selecting, using the one or more processors at the eNodeB, a scrambling code for the one or more repetitions of PBCH content, wherein the scrambling code is selected based on a physical cell identifier (ID); and
applying, using the one or more processors at the eNodeB, the scrambling code to the one or more repetitions of PBCH content prior to transmission of the one or more repetitions of PBCH content from the eNodeB to the UE.
14. The at least one non-transitory machine readable storage medium of claim 13 , wherein the PBCH content includes modified physical broadcast channel (mPBCH) content.
15. The at least one non-transitory machine readable storage medium of claim 13 , wherein each repetition of PBCH content is transmitted from the eNodeB to the UE in a slot of a subframe.
16. The at least one non-transitory machine readable storage medium of claim 13 , further comprising instructions when executed perform the following:
scrambling bits included in the one or more repetitions of PBCH content according to {tilde over (b)} m (i)=(b(i)+c m (i))mod2, wherein c m (i) is a scrambling sequence and is initialized with c init m =f(N ID cell ) in each radio frame fulfilling n f mod4=0, wherein {tilde over (b)} m (i) represents a block of scrambled bits and b(i) represents a block of bits.
17. The at least one non-transitory machine readable storage medium of claim 13 , further comprising instructions when executed perform the following:
applying the scrambling code on the one or more repetitions of PBCH content on top of an existing scrambling code.
18. The at least one non-transitory machine readable storage medium of claim 13 , further comprising instructions when executed perform the following:
applying the scrambling code on information bits, encoded bits or modulation symbols included in the one or more repetitions of PBCH content.
19. The at least one non-transitory machine readable storage medium of claim 13 , further comprising instructions when executed perform the following:
selecting a separate scrambling code for each repetition of PBCH content.
20. The at least one non-transitory machine readable storage medium of claim 13 , wherein the UE is operable to perform machine type communication (MTC).