RACH response preamble reduction
A method is disclosed for reducing processor utilization at a cellular base station, comprising: sending a number of random access preambles in a System Information Block (SIB) that may be less than 64; subtracting the number of random access preambles from 64 to obtain a ceiling of dedicated preambles; and using root sequences to generate a number of dedicated preambles less than or equal to the number of random access preambles, thereby reducing processor utilization relative to generating 64 preambles.
1. A method for reducing processor utilization at a cellular base station, comprising:
sending a number of random access preambles in a System Information Block (SIB) that is less than 64;
subtracting the number of random access preambles from 64 to obtain a ceiling of dedicated preambles; and
using root sequences to generate a number of dedicated preambles less than or equal to the number of random access preambles,
thereby reducing processor utilization relative to generating 64 preambles.
2. The method of claim 1 , wherein the cellular base station is a Long Term Evolution (LTE) eNodeB, the SIB is SIB 2 , and the number of random access preambles is numberOfRA−Preambles.
3. The method of claim 1 , further comprising configuring, by an operator, a number of random access preambles based on a deployment use case.
4. The method of claim 1 , further comprising computing a desired number of random access preambles based on a deployment use case.
5. The method of claim 1 , further comprising computing a desired number of random access preambles based on a desired cell range.
6. A non-transitory computer-readable medium containing instructions for reducing processor utilization at a cellular base station, which, when executed, cause the cellular base station to perform steps comprising:
sending a number of random access preambles in a System Information Block (SIB) that is less than 64;
subtracting the number of random access preambles from 64 to obtain a ceiling of dedicated preambles; and
using root sequences to generate a number of dedicated preambles less than or equal to the number of random access preambles,
thereby reducing processor utilization relative to generating 64 preambles.
7. The non-transitory computer-readable medium of claim 6 , wherein the cellular base station is a Long Term Evolution (LTE) eNodeB, the SIB is SIB2, and the number of random access preambles is numberOfRA−Preambles.
8. The non-transitory computer-readable medium of claim 6 , further comprising instructions for configuring, by an operator, a number of random access preambles based on a deployment use case.
9. The non-transitory computer-readable medium of claim 6 , further comprising instructions for computing a desired number of random access preambles based on a deployment use case.
10. The non-transitory computer-readable medium of claim 6 , further comprising instructions for computing a desired number of random access preambles based on a desired cell range.