Method and apparatus of determining a set of zero correlation zone lengths
AssigneeHuawei Technologies Co., Ltd.
InventorOskar Mauritz
Life of this patent
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Abstract
A method of determining a set of Zero Correlation Zone (ZCZ) lengths, comprises: determining the length of a root sequence, and selecting such a set of ZCZ lengths that, for any cell radius, the maximum number of preambles obtained from a ZCZ length which is selected from the selected set of ZCZ lengths is closest to the maximum number of preambles determined from a ZCZ length which is selected from the set of all integers, wherein the maximum number of preambles is determined from the length of the root sequence and a ZCZ length selected. This disclosure provides a technical solution for selecting a better limited set of ZCZ lengths by which signaling overload is reduced.
Claims20
A method of determining a set of Zero Correlation Zone, ZCZ, lengths of a mobile communication system, comprising:
- selecting a set of cyclic shift increments comprising one cyclic shift increment NCS=0 and K+1 non-zero cyclic shift increments NCS(k) values;
- determining a set of ZCZ lengths by decreasing each non-zero cyclic shift increment of the set of cyclic shift increments by 1, wherein the set of cyclic shift increments is used for generating random access preambles, and non-zero cyclic shift increments NCS(k) in the set of cyclic shift increments NCS(k) are generated with the following formula:
- NCS(k)=└NZC/[Npre(0)×ak+a/(1−a)×(ak−1)]┘, k=0, 1, 2 . . . K;
- wherein └x┘ denotes the maximum integer not greater than x, [x] denotes rounding x, a=0.856, Npre(0)=64 and NZC=839.
A method of determining a set of Zero Correlation Zone, ZCZ, lengths of a mobile communication system, comprising:
- selecting a set of cyclic shift increments;
- determining a set of ZCZ lengths by decreasing each non-zero cyclic shift increment of the set of cyclic shift increments by 1, wherein the set of cyclic shift increments is used for generating random access preambles, and the set of cyclic shift increments NCS(k) is as illustrated in the following table:
- k
- NCS(k)
- 0
- 13
- 1
- 15
- 2
- 18
- 3
- 22
- 4
- 26
- 5
- 32
- 6
- 38
- 7
- 46
- 8
- 59
- 9
- 76
- 10
- 93
- 11
- 119
- 12
- 167
- 13
- 279
- 14
- 419
- 15
- 0
An apparatus of determining a set of Zero Correlation Zone, ZCZ, lengths of a mobile communication system, comprising:
- a unit, adapted to select a set of cyclic shift increments;
- and
- a unit, adapted to determine a set of ZCZ lengths by decreasing each non-zero cyclic shift increment of the set of cyclic shift increments by 1, wherein the set of cyclic shift increments is used for generating random access preambles, and the set of cyclic shift increments NCS(k) is as illustrated in the following table:
- k
- NCS(k)
- 0
- 13
- 1
- 15
- 2
- 18
- 3
- 22
- 4
- 26
- 5
- 32
- 6
- 38
- 7
- 46
- 8
- 59
- 9
- 76
- 10
- 93
- 11
- 119
- 12
- 167
- 13
- 279
- 14
- 419
- 15
- 0
Dependencies are inferred from the claim text.