CN101340234B - Method for mapping physical stochastic access channel - Google Patents

Abstract

The invention provides a method for mapping a physical random access channel, which includes the following steps: obtaining the intensity and the amount of versions of the physical random access channels; constructing density indexes according to the density and constructing version number according to the amount of the versions; constructing the numbers of the physical random access channels by the density indexes and the version number, and increasing the density indexes and the version number sequentially; mapping all the physical random access channels into a time domain and/or a frequency domain sequentially according to the numbers. The method can ensure that the time needs processing by the same base station is to be distributed uniformly, meanwhile, the method can maximally reduce the interference of the second class of PRACH among districts.

Description

A kind of method for mapping physical random access channel

Technical field

The present invention relates to the communications field, in particular to a kind of method for mapping physical random access channel.

Background technology

The frame structure of LTE system TDD (Time Division Duplex, time division duplex) pattern as shown in Figure 1.In this frame structure; a 10ms (307200Ts; radio frames 1ms=30720Ts) is divided into two fields; each half frame length 5ms (153600Ts); comprise the common time slot that 8 length are 0.5ms; and three special time slots; be DwPTS (Downlink Pilot Time Slot; descending pilot frequency time slot), GP (Guard Period; protect interval) and UpPTS (Uplink Pilot Time Slot; uplink pilot time slot), and these three special time slot length sums be 1ms (30720Ts).Subframe 1 is comprised of three special time slots all the time; When 2 downstream-to-upstream transfer points are arranged in 10ms, subframe 6 is comprised of three special time slots, and in other situation, 6 of subframes comprise DwPTS (at this moment DwPTS length is 1ms).Other subframe is comprised of 2 common time slots.

In above-mentioned frame structure, subframe 0,5 and DwPTS are all the time for downlink transfer, and subframe 2 and UpPTS are all the time for uplink.When 2 downstream-to-upstream transfer points are arranged in 10ms, subframe 7 is also for uplink.

Under the tdd mode of LTE system, the structure of Physical Random Access Channel (PRACH, Physical Random Access CHannel) as shown in Figure 5, can be divided into two large classes are arranged:

The √ first kind is transmitted in general sub-frame of uplink (subframe that does not comprise special time slot), and this class PRACH has 4 kinds, is respectively

■ Preamble format 0 (leading form 0): account for 1 sub-frame of uplink, CP (Cyclic Prefix) length is 3168TS, and preamble (leading) length is 24576Ts;

■ Preamble format 1: account for 2 sub-frame of uplink, CP (Cyclic Prefix) length is 21024TS, and preamble (leading) length is 24576Ts;

■ Preamble format 2: account for 2 sub-frame of uplink, CP (Cyclic Prefix) length is 6240TS, and preamble (leading) length is 2 * 24576Ts;

■ Preamble format 3: account for 3 sub-frame of uplink, CP (Cyclic Prefix) length is 21024Ts, and preamble (leading) length is 2 * 24576Ts;

The √ Equations of The Second Kind transmits in UpPTS, and this class PRACH has a kind, for

■ Preamble format 4:CP (Cyclic Prefix) length is 448Ts, and preamble (leading) length is 4096Ts;

At frequency domain, above-mentioned various PRACH account for 6 RB (Resource Block), and each RB comprises 12 subcarriers, and the bandwidth of each subcarrier is 15kHz.

Mobile phone, when connecting system, at first will carry out down-going synchronous, and then mobile phone demodulation broadcast channel obtains the preparation parameter of PRACH, finally completes uplink synchronous by PRACH again, and foundation is connected with base station.Here, under tdd mode, the preparation parameter of PRACH comprises that density (has how many PRACH to use within the unit interval, D=2PRACH/10ms for example, represent in 10ms have 2 PRACH can with), leading form (preamble format), version number.Wherein, form, density is identical but the version difference means that preamble format is identical, in the unit interval, the quantity of PRACH is identical, but the time domain of these PRACH or frequency domain position difference.For the same form, the PRACH of same density arranges a plurality of versions, it is that the PRACH of the different districts by same BTS management is broken up in time that different districts is used the purpose of different editions, make each community that same base station is managed propose the processing request of PRACH in the different moment as far as possible, avoid occurring that base station is constantly too busy at some, and in other constantly countless phenomenons according to processing.In addition, the PRACH that is preamble format 4 for type, owing to not sending data in UpPTS, so different districts is used the PRACH of different version ，Ge communities to have different time domains or frequency domain position, reduce the effect that minizone PRACH disturbs in addition.

In the process of uplink synchronous, mobile phone to utilize the preparation parameter of PRACH according to certain algorithm, obtain the PRACH that can use this community the time, position frequently.In realizing process of the present invention, the inventor finds not propose in the prior art when rational, position mapping algorithm frequently, thereby causes same base station to process PRACH skewness in time, and has the larger problem of presence of intercell interference of Equations of The Second Kind PRACH.

Summary of the invention

The present invention aims to provide a kind of method for mapping physical random access channel, to solve same base station in prior art, processes PRACH problem pockety in time.

In an embodiment of the present invention, provide a kind of method for mapping physical random access channel, comprised the following steps: the density D that obtains Physical Random Access Channel _rAwith version number R; Build the density index according to density, this density index is according to the version number build version number, this version number is r _rA=0,1 ..., R-1; Use density index and version number to build the numbering of Physical Random Access Channel wherein make density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And by all Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on.

Preferably, the density of obtaining Physical Random Access Channel specifically comprises: make

wherein

be the quantity of the Physical Random Access Channel of the current format that can hold on time domain in a random access period,

quantity for the Physical Random Access Channel that can hold on available frequency resources.

Preferably, D _rA=0.5 Physical Random Access Channel/10ms, be mapped to all Physical Random Access Channels in an orderly manner on time domain and comprise that the employing following methods is mapped to all Physical Random Access Channels on the 10ms radio frames according to numbering: press

ascending or descending, compartment of terrain is mapped to Physical Random Access Channel on the radio frames that is numbered even number and odd number, wherein, the Physical Random Access Channel that is numbered even number is mapped on the radio frames that is numbered even number, and the Physical Random Access Channel that is numbered odd number is mapped on the radio frames that is numbered odd number; The Physical Random Access Channel that perhaps is numbered even number is mapped on the radio frames that is numbered odd number, and the Physical Random Access Channel that is numbered odd number is mapped on the radio frames that is numbered even number.

Preferably, D _rA=0.5 Physical Random Access Channel/10ms is mapped to all Physical Random Access Channels in an orderly manner on time domain and comprises that the employing following methods is mapped to all Physical Random Access Channels on the 10ms radio frames according to numbering: according to

size, the first half Physical Random Access Channel is mapped on the radio frames that is numbered even number or odd number, the later half Physical Random Access Channel is mapped on the radio frames that is numbered odd number or even number, wherein, will

physical Random Access Channel be mapped on the radio frames that is numbered even number, remaining Physical Random Access Channel is mapped on the radio frames that is numbered odd number, total in one of them random access period individual Physical Random Access Channel; Perhaps will

physical Random Access Channel be mapped on the radio frames that is numbered odd number, remaining Physical Random Access Channel is mapped on the radio frames that is numbered even number; Perhaps will

physical Random Access Channel be mapped on the radio frames that is numbered even number, remaining Physical Random Access Channel is mapped on the radio frames that is numbered odd number; Perhaps will

physical Random Access Channel be mapped on the radio frames that is numbered odd number, remaining Physical Random Access Channel is mapped on the radio frames that is numbered even number.

Preferably, D _rA>0.5 Physical Random Access Channel/10ms, be mapped to all Physical Random Access Channels in an orderly manner on time domain and comprise that the employing following methods is mapped to all Physical Random Access Channels on the 10ms radio frames according to numbering: all Physical Random Access Channels are mapped on each radio frames.

Preferably, all Physical Random Access Channels are mapped in an orderly manner on time domain and comprise and being mapped on its 5ms field being assigned to a Physical Random Access Channel on the 10ms radio frames according to numbering, wherein, step a, work as N _sP=1 o'clock, all Physical Random Access Channels that are mapped in radio frames are mapped in first field of radio frames; Step b, work as N _sP=2 o'clock, the Physical Random Access Channel be mapped on radio frames is divided into to two groups, be mapped to respectively on first and second field of radio frames; N wherein _sPbe the quantity of downstream-to-upstream transfer point in a described radio frames.

Preferably, step b specifically comprises: press

ascending or descending, compartment of terrain is mapped to Physical Random Access Channel on first and second field, wherein, if by Physical Random Access Channel according to it

ascending renumbeing, obtain

(mode renumberd can be

), Q is the quantity that is mapped to the Physical Random Access Channel on radio frames, when leading form is 0 and D _rA≤ 3 o'clock, order

otherwise, order

and

represent respectively the quantity of the Physical Random Access Channel of a kind of form that first field and second field hold on time domain, will for the Physical Random Access Channel of even number is mapped on first field, for the Physical Random Access Channel of odd number is mapped on second field; Perhaps will

for the Physical Random Access Channel of even number is mapped on second field,

for the Physical Random Access Channel of odd number is mapped on first field.

Preferably, step b specifically comprises: press

ascending or descending, compartment of terrain is mapped to Physical Random Access Channel on first and second field, wherein, if by Physical Random Access Channel according to it

ascending renumbeing, obtain (mode renumberd can be

), Q is the quantity that is mapped to the Physical Random Access Channel on radio frames, when leading form is 0 and D _rA=2 o'clock, order

otherwise, order

n wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames,

and

represent respectively the quantity of the Physical Random Access Channel of a kind of form that first field and second field hold on time domain, will

for the Physical Random Access Channel of even number is mapped on first field,

for the Physical Random Access Channel of odd number is mapped on second field; Perhaps will

for the Physical Random Access Channel of even number is mapped on second field,

for the Physical Random Access Channel of odd number is mapped on first field.

Preferably, step b specifically comprises: press

ascending or descending, compartment of terrain is mapped to Physical Random Access Channel on first and second field, wherein, if by Physical Random Access Channel according to it

ascending renumbeing, obtain

(mode renumberd can be

), Q is the quantity that is mapped to the Physical Random Access Channel on radio frames, order

n wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames,

and represent respectively the quantity of the Physical Random Access Channel of a kind of form that first field and second field hold on time domain, will

for the Physical Random Access Channel of even number is mapped on first field,

for the Physical Random Access Channel of odd number is mapped on second field; Perhaps will

for the Physical Random Access Channel of even number is mapped on second field,

for the Physical Random Access Channel of odd number is mapped on first field.

Preferably, the form of Physical Random Access Channel is leading format 4, and all Physical Random Access Channels are mapped in an orderly manner on time domain and comprise and being mapped on its uplink pilot time slot being assigned to a Physical Random Access Channel on the 5ms field according to numbering.

Preferably, the form of Physical Random Access Channel is leading form 0～3, by all Physical Random Access Channels according to the numbering be mapped in an orderly manner on time domain comprise by be fitted on a Physical Random Access Channel on the 5ms field by

ascending, be mapped to from front to back, circularly in the sub-frame of uplink of field, until the Physical Random Access Channel be assigned on field all shone upon, and on time domain, adjacent two Physical Random Access Channels uniformly-spaced, wherein, arrange and are spaced apart 0; If the sub-frame of uplink number that perhaps Physical Random Access Channel accounts for is L, the quantity that is mapped to the Physical Random Access Channel on field is P, and the sub-frame of uplink number of current field is

arrange and be spaced apart

Preferably, the form of Physical Random Access Channel is leading form 0～3, by all Physical Random Access Channels according to the numbering be mapped in an orderly manner on time domain comprise by be fitted on a Physical Random Access Channel on the 5ms field by

ascending, be mapped to from back to front, circularly in the sub-frame of uplink of field, until the Physical Random Access Channel be assigned on field all shone upon, and on time domain, adjacent two Physical Random Access Channels uniformly-spaced, wherein, arrange and are spaced apart 0; If the sub-frame of uplink number that perhaps Physical Random Access Channel accounts for is L, the quantity that is mapped to the Physical Random Access Channel on field is P, and the sub-frame of uplink number of current field is

arrange and be spaced apart

Preferably, a Physical Random Access Channel accounts for L sub-frame of uplink on time domain, all Physical Random Access Channels is mapped in an orderly manner on frequency domain and comprises and being shone upon on frequency domain one of by the following method being mapped to L the Physical Random Access Channel on sub-frame of uplink according to numbering: press

ascendingly or descending successively Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; Press

ascendingly or descending successively Physical Random Access Channel is shone upon to both sides from centre in available frequency resource, a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; Press

ascending or descending Physical Random Access Channel is shone upon to centre from both sides in available frequency resource, a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; By the r of version number _rAidentical Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process; The Physical Random Access Channel that the r of version number is identical shines upon to centre from both sides in available frequency resource, and a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; Adopt identical mapping process for each r of version number.

Preferably, the Physical Random Access Channel that time-domain position is identical has W, according to ascending or descending renumbeing as, w=0,1,2 ..., W-1, press

ascending or descending Physical Random Access Channel is shone upon and specifically comprises from both sides to centre in available frequency resource: the Physical Random Access Channel that w is even number is ascending or descending by w to be shone upon to low frequency from high frequency available frequency resource, for the Physical Random Access Channel of odd number is ascending or descending by w, in available frequency resource, from low frequency, to high frequency, shine upon, or w is even number Physical Random Access Channel is ascending or descending by w from low frequency, to high frequency, to shine upon in available frequency resource, for the Physical Random Access Channel of odd number is ascending or descending by w, in available frequency resource, from high frequency, to low frequency, shine upon, or the first half Physical Random Access Channel is ascending or descending by w in available frequency resource, from high frequency, to low frequency, shines upon, the later half Physical Random Access Channel is ascending or descending by w to be shone upon to high frequency from low frequency in available frequency resource, or the first half Physical Random Access Channel is ascending or descending by w in available frequency resource, from low frequency, to high frequency, shines upon, the later half Physical Random Access Channel is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, wherein with

or

or

or physical Random Access Channel be the first half, take remaining Physical Random Access Channel as later half.

Preferably, version number is r _rAand the Physical Random Access Channel that time-domain position is identical has W, numbering is respectively w=0, 1, 2, ..., W-1, these time-domain positions are identical, and version number also identical W Physical Random Access Channel shines upon and specifically comprises from both sides to centre in available frequency resource: the Physical Random Access Channel that w is even number is ascending or descending by w to be shone upon to low frequency from high frequency available frequency resource, for the Physical Random Access Channel of odd number is ascending or descending by w, in available frequency resource, from low frequency, to high frequency, shine upon, or w is even number Physical Random Access Channel is ascending or descending by w from low frequency, to high frequency, to shine upon in available frequency resource, for the Physical Random Access Channel of odd number is ascending or descending by w, in available frequency resource, from high frequency, to low frequency, shine upon, or the first half Physical Random Access Channel is ascending or descending by w in available frequency resource, from high frequency, to low frequency, shines upon, the later half Physical Random Access Channel is ascending or descending by w to be shone upon to high frequency from low frequency in available frequency resource, or the first half Physical Random Access Channel is ascending or descending by w in available frequency resource, from low frequency, to high frequency, shines upon, the later half Physical Random Access Channel is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, wherein with

or

or or

physical Random Access Channel be the first half, take remaining Physical Random Access Channel as later half.

Preferably, all Physical Random Access Channels are mapped on frequency domain to the Physical Random Access Channel comprised being mapped on a sub-frame of uplink or uplink pilot time slot in an orderly manner according to numbering is shone upon by the following method on frequency domain: by the r of version number _rAall Physical Random Access Channels identical, that be mapped on a sub-frame of uplink or uplink pilot time slot are shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, wherein, with above-mentioned steps, Physical Random Access Channel is mapped to sub-frame of uplink or the uplink pilot time slot on adjacent two fields, adopt respectively different mapping orders, and a Physical Random Access Channel accounts for 6 Resource Block, and the adjacent shared frequency band zero lap of two Physical Random Access Channels on frequency domain, for each r of version number _rAall adopt identical mapping process.

Preferably, by the r of version number _rAall Physical Random Access Channels identical, that be mapped on a sub-frame of uplink or uplink pilot time slot are shone upon specifically and comprise in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency: in the even number radio frames, the sub-frame of uplink of first field or uplink pilot time slot shine upon to high frequency from the low frequency of available band; The sub-frame of uplink of second field or uplink pilot time slot shine upon to low frequency from the high frequency of available band; In the odd number radio frames, the sub-frame of uplink of first field or uplink pilot time slot shine upon to low frequency from the high frequency of available band; The sub-frame of uplink of second field or uplink pilot time slot shine upon to high frequency from the low frequency of available band; Or, in the odd number radio frames, the sub-frame of uplink of first field or uplink pilot time slot shine upon to high frequency from the low frequency of available band; The sub-frame of uplink of second field or uplink pilot time slot shine upon to low frequency from the high frequency of available band; In the even number radio frames, the sub-frame of uplink of first field or uplink pilot time slot shine upon to low frequency from the high frequency of available band; The sub-frame of uplink of second field or uplink pilot time slot shine upon to high frequency from the low frequency of available band; Or shone upon according to the quantity of uplink pilot time slot in a radio frames.

Preferably, shone upon specifically and comprised according to the quantity of uplink pilot time slot in a radio frames: the situation that two uplink pilot time slots are arranged for a radio frames, in the inherent available band of sub-frame of uplink in first field or uplink pilot time slot, from low frequency, to high frequency, shine upon, in the inherent available band of sub-frame of uplink in second field or uplink pilot time slot, from high frequency, to low frequency, shine upon, each radio frames adopts identical method; Or from high frequency, to low frequency, shine upon in the sub-frame of uplink in first field or the inherent available band of uplink pilot time slot, in the inherent available band of sub-frame of uplink in second field or uplink pilot time slot, from low frequency, to high frequency, shine upon, each radio frames adopts identical method; The situation that a uplink pilot time slot is arranged for a radio frames, in the sub-frame of uplink or uplink pilot time slot of even number radio frames, shine upon to high frequency from low frequency in available band, in the sub-frame of uplink or uplink pilot time slot of odd number radio frames, shine upon to low frequency from high frequency in available band; Or, in the sub-frame of uplink or uplink pilot time slot of odd number radio frames, in available band, from low frequency, to high frequency, shine upon, in the sub-frame of uplink or uplink pilot time slot of even number radio frames, in available band, from high frequency, to low frequency, shine upon; Or, in the sub-frame of uplink or uplink pilot time slot of all radio frames, in available band, from low frequency, to high frequency, shine upon; Or, in the sub-frame of uplink or uplink pilot time slot of all radio frames, in available band, from low frequency, to high frequency, shine upon; Or, in the sub-frame of uplink or uplink pilot time slot of all radio frames, in available band, from both sides, to centre, shine upon.

Preferably, the density of obtaining Physical Random Access Channel specifically comprises: by base station, by the control signal of Physical Random Access Channel, directly notified.

Preferably, the version number that obtains Physical Random Access Channel specifically comprises following at least one method: by the Physical Random Access Channel preparation kind of being sent by base station, according to the version number of leading form and density combinations in Physical Random Access Channel preparation set, determine; The Physical Random Access Channel quantity that version number is supported at frequency domain according to system

the quantity N of 10ms internal conversion point _sPand the density D of Physical Random Access Channel _rA, by calculating

obtain; Version number is fixed as 3.

Preferably, also be included in while using mapping algorithm, obtain the r of version number _rA, it specifically comprises: by the Physical Random Access Channel preparation kind of being sent by base station, directly obtain the r of version number _rA; And r _rA∈ [0, R-1].

Preferably, the time domain mapping formula all Physical Random Access Channels are mapped on the 10ms radio frames is: $t_{\mathrm{RA}}^0=\mathrm{\α}(\left(n_{\mathrm{Ra}}^{\mathrm{ind}}\mathrm{mod}2\right)+1)$

Wherein

mean Physical Random Access Channel is in which radio frames, and 0 represents each radio frames, and 1 represents the even number radio frames, and 2 represent the odd number radio frames, α=(2D _rA) mod 2, and

front conductivity type and the r of PRACH _rA, D _rAby base station, notified to mobile phone;

If will and the above-mentioned expression formula of α substitution,

also can write and do

in addition, due to D _rA>=1 o'clock, α=0; D _rA=0.5 o'clock,

so also can be write as $t_{\mathrm{RA}}^0=\left(\left({2D}_{\mathrm{RA}}\right)\mathrm{mod}2\right)(1+r_{\mathrm{RA}}\mathrm{mod}2).$

Preferably, be mapped to time domain on its 5ms field mapping formula and be being assigned to a Physical Random Access Channel on the 10ms radio frames:

$t_{\mathrm{RA}}^1=m_{\mathrm{RA}}^{\mathrm{ind}}\mathrm{mod}{N}_{\mathrm{SP}}$

Work as D _rA≤ 3 and leading form be 0 o'clock,

$m_{\mathrm{RA}}^{\mathrm{ind}}=n_{\mathrm{RA}}^{\′\mathrm{ind}}$

Otherwise

$m_{\mathrm{RA}}^{\mathrm{ind}}=n_{\mathrm{RA}}^{\′\mathrm{ind}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

Wherein

mean Physical Random Access Channel is at which field, and 0 represents first field, and 1 represents second field, the mod 2 of α=(2D),

and

front conductivity type and the r of PRACH _rA, D _rAby base station, notified to mobile phone, for the quantity of the uplink pilot time slot of the sub-frame of uplink of leading form 0～3 in field or leading format 4, i=0 is first field, and i=1 is the 2nd field;

If by α,

the above-mentioned expression formula of substitution,

also can be expressed as

Work as D _rA≤ 3 and leading form be 0 o'clock,

Otherwise

Preferably, be mapped to time domain on its 5ms field mapping formula and be being assigned to a Physical Random Access Channel on the 10ms radio frames:

$t_{\mathrm{RA}}^1=m_{\mathrm{RA}}^{\mathrm{ind}}\mathrm{mod}{N}_{\mathrm{SP}}$

Work as D _rA=2 and leading form be 0 o'clock,

$m_{\mathrm{RA}}^{\mathrm{ind}}=n_{\mathrm{RA}}^{\′\mathrm{ind}}$

Otherwise

$m_{\mathrm{RA}}^{\mathrm{ind}}=n_{\mathrm{RA}}^{\′\mathrm{ind}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

Wherein

mean Physical Random Access Channel is at which field, and 0 represents first field, and 1 represents second field, the mod 2 of α=(2D),

and

front conductivity type and the r of PRACH _rA, D _rAby base station, notified to mobile phone,

for the quantity of the uplink pilot time slot of the sub-frame of uplink of leading form 0～3 in field or leading format 4, i=0 is first field, and i=1 is the 2nd field;

If by α,

the above-mentioned expression formula of substitution,

also can be expressed as

Work as D _rA=2 and leading form be 0 o'clock,

Otherwise

Preferably, be mapped to time domain on its 5ms field mapping formula and be being assigned to a Physical Random Access Channel on the 10ms radio frames:

$t_{\mathrm{RA}}^1=m_{\mathrm{RA}}^{\mathrm{ind}}\mathrm{mod}{N}_{\mathrm{SP}}$

$m_{\mathrm{RA}}^{\mathrm{ind}}=n_{\mathrm{RA}}^{\′\mathrm{ind}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

Wherein

mean Physical Random Access Channel is at which field, and 0 represents first field, and 1 represents second field, the mod 2 of α=(2D),

and

front conductivity type and the r of PRACH _rA, D _rAby base station, notified to mobile phone,

for the quantity of the uplink pilot time slot of the sub-frame of uplink of leading form 0～3 in field or leading format 4, i=0 is first field, and i=1 is the 2nd field;

If by α,

the above-mentioned expression formula of substitution,

also can be expressed as

Preferably, be mapped to time domain on its sub-frame of uplink or uplink pilot time slot mapping formula and be being assigned to a Physical Random Access Channel on the 5ms field:

Wherein

mean that Physical Random Access Channel is mapped on which sub-frame of uplink (leading form 0～3) or uplink pilot time slot (leading format 4) in field.The mod 2 of α=(2D),

and

front conductivity type and the r of PRACH _rA, D _rAby base station, notified to mobile phone,

for the quantity of the uplink pilot time slot of the sub-frame of uplink of leading form 0～3 in field or leading format 4, i=0 is first field, and i=1 is the 2nd field;

Annotate: for leading format 4, only have at most a uplink pilot time slot in a field, so now

Preferably, the frequency domain mapping formula shone upon on frequency domain is:

K wherein _rAfor first available frequency domain resource piece of certain Physical Random Access Channel, and

for ascending resource piece sum; α=(2D _rA) mod 2;

be the frequency domain map index of Physical Random Access Channel, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-1;$ Its implication is: version number is r _rA, and time-domain position by

the numbering of determined all Physical Random Access Channels, k ' _rAfor low frequency, first can be used for the position of the Resource Block of Physical Random Access Channel,

for version number is r _rA, and time-domain position by

the quantity of determined all Physical Random Access Channels;

for the quantity of sub-frame of uplink in field (leading form 0～3) or uplink pilot time slot (leading format 4), i=0 is first field, and i=1 is the 2nd field; L _rAthe sub-frame of uplink number accounted for for the PRACH channel of certain leading form (leading form 0～3), for leading format 4, L _rA=1.

n _sPquantity for the downstream-to-upstream transfer point;

under current system bandwidth, the quantity of the open ended Physical Random Access Channel of frequency domain.

Preferably, the frequency domain mapping formula shone upon on frequency domain is:

For preamble format 0～3 (form of Physical Random Access Channel is leading form 0～3)

For preamble format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}(\left(\mathrm{SFN}\mathrm{mod}2\right)\·(2-N_{\mathrm{SP}})+t_{\mathrm{RA}}^1)\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

For preamble format 0～3

For preamble format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}(\left(\mathrm{SFN}\mathrm{mod}2\right)+t_{\mathrm{RA}}^1)\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for Physical Random Access Channel is leading form 0～3

Form for Physical Random Access Channel is leading format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for Physical Random Access Channel is leading form 0～4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for Physical Random Access Channel is leading form 0～4

Work as N _sP=2 o'clock,

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Work as N _sP=1 o'clock,

Perhaps

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

Work as N _sP=2 o'clock,

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Work as N _sP=1 o'clock,

K wherein _rAfor first available frequency domain resource piece of certain Physical Random Access Channel, and

for ascending resource piece sum; α=(2D _rA) mod 2;

be the frequency domain map index of Physical Random Access Channel, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-1;$ Its implication is: version number is r _rA, and time-domain position by

the numbering of determined all Physical Random Access Channels, k ' _rAfor low frequency, first can be used for the position of the Resource Block of Physical Random Access Channel,

for version number is r _rA, and time-domain position by

the quantity of determined all Physical Random Access Channels; for the quantity of sub-frame of uplink in field (leading form 0～3) or uplink pilot time slot (leading format 4), i=0 is first field, and i=1 is the 2nd field; L _rAthe sub-frame of uplink number accounted for for the PRACH channel of certain leading form (leading form 0～3), for leading format 4, L _rA=1.

n _sPquantity for the downstream-to-upstream transfer point;

under current system bandwidth, the quantity of the open ended Physical Random Access Channel of frequency domain;

equal 0 or 1, so

be equivalent to

be equivalent to

Preferably, the frequency domain mapping formula shone upon on frequency domain is:

For preamble format 0～3

For preamble format 4

wherein

Perhaps

For preamble format 0～3

For preamble format 4

wherein

K wherein _rAfor first available frequency domain resource piece of certain Physical Random Access Channel, and

for ascending resource piece sum; α=(2D _rA) mod 2; be the frequency domain map index of Physical Random Access Channel, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-1;$ Its implication is: version number is r _rA, and time-domain position by

the numbering of determined all Physical Random Access Channels, k ' _rAfor low frequency, first can be used for the position of the Resource Block of Physical Random Access Channel,

for version number is r _rA, and time-domain position by the quantity of determined all Physical Random Access Channels; for the quantity of sub-frame of uplink in field (leading form 0～3) or uplink pilot time slot (leading format 4), i=0 is first field, and i=1 is the 2nd field; L _rAthe sub-frame of uplink number accounted for for the PRACH channel of certain leading form (leading form 0～3), for leading format 4, L _rA=1. n _sPquantity for the downstream-to-upstream transfer point;

under current system bandwidth, the quantity of the open ended Physical Random Access Channel of frequency domain.

The mapping method of the Physical Random Access Channel of above-described embodiment has been considered density and version number's factor because adopt in mapping, process the PRACH problem such as skewness in time so overcome same base station, and then reached and can make to need same base station to process PRACH to be uniformly distributed in time, can also to reduce to greatest extent the effect of the presence of intercell interference of Equations of The Second Kind PRACH simultaneously.

The accompanying drawing explanation

Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.In the accompanying drawings:

Fig. 1 shows the frame structure of LTE system TDD mode;

Fig. 2 shows the flow chart according to the method for the mapping physical random access channel of the embodiment of the present invention;

Fig. 3 shows transfer point of each radio frames, D: U=6: 3;

Fig. 4 shows two transfer points of each radio frames, preamble format 0, D: U=3: 5;

Fig. 5 shows two transfer points of each radio frames, preamble format 4, D: U=3: 5;

Fig. 6 shows the PRACH structural representation;

Fig. 7 shows the available frequency resources schematic diagram;

Fig. 8 shows embodiment mono-mapping result and gives an example one;

Fig. 9 shows embodiment mono-mapping result and gives an example two;

Figure 10 shows embodiment bis-, embodiment tri-and embodiment six mapping result give an example one;

Figure 11 shows embodiment bis-mapping result and gives an example two;

Figure 12 shows embodiment tri-mapping result and gives an example two;

Figure 13 shows embodiment six mapping result and gives an example two.

Embodiment

Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.

Fig. 2 shows the flow chart according to the method for the mapping physical random access channel of the embodiment of the present invention, comprises the following steps:

Step S10, obtain density and the version number of Physical Random Access Channel;

Step S20, build the density index according to density, and according to the version number build version number;

Step S30, used density index and version number to build the numbering of Physical Random Access Channel; And

Step S40, by all Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on.

This mapping method has been considered density and version number's factor because adopt in mapping, process the PRACH problem such as skewness in time so overcome same base station, and then reached and can make to need same base station to process PRACH to be uniformly distributed in time, can also to reduce to greatest extent the effect of the presence of intercell interference of Equations of The Second Kind PRACH simultaneously.

In order to describe better the present invention, carry out following definitions, do not form limitation of the invention.

The density of definition PRACH is D, and version number is R, total in a random access period

individual PRACH needs numbering, wherein, D means to use the community of this density in a random access period, to have how many PRACH to use, for example D=n PRACH/10ms means in the random access period of each 10ms to have n PRACH can use (if n=0.5 represents in the random access period of each 20ms and has 1 PRACH to use).If suppose that the index of certain community available PRACH in a random access period is d (can be described as PRACH index or density index in community), and version number is r, and r=0,1 ..., R-1, whole mapping algorithm is divided into PRACH numbering, time-domain position mapping, frequency domain position and shines upon three parts, and preferentially carries out the time-domain position mapping during mapping, and then carries out the frequency domain position mapping.

◆ the PRACH numbering:

■ method 1

First increase progressively the density index during numbering, then increment version;

If according to top definition,

wherein

r=0,1 ..., R-1.

■ method 2

First increment version during numbering, then increase progressively the density index;

If according to top definition,

wherein

r=0,1 ..., R-1.

In addition, when selecting D, also need to meet

wherein be the PRACH quantity of the current format that can hold on time domain in a random access period,

for the PRACH quantity that can hold on available frequency resources.

◆ the time domain mapping comprises

■ radio frames mapping: all PRACH are mapped on the 10ms radio frames.

when D=0.5PRACH/10ms

● method 1

By number

ascending or descending, compartment of terrain is mapped to PRACH on the radio frames that is numbered even number and odd number.

√ method 1.1

Numbering

for the PRACH of even number is mapped on the radio frames that is numbered even number, the PRACH that is numbered odd number is mapped on the radio frames that is numbered odd number;

√ method 1.2

Numbering

for the PRACH of even number is mapped on the radio frames that is numbered odd number, the PRACH that is numbered odd number is mapped on the radio frames that is numbered even number;

● method 2

According to numbering

size, the first half PRACH is mapped on the radio frames that is numbered even number or odd number, later half PRACH is mapped on the radio frames that is numbered odd number or even number.

√ method 2.1

Will

pRACH be mapped on the radio frames that is numbered even number, remaining PRACH is mapped on the radio frames that is numbered odd number;

√ method 2.2

Will

pRACH be mapped on the radio frames that is numbered odd number, remaining PRACH is mapped on the radio frames that is numbered even number;

√ method 2.3

Will

pRACH be mapped on the radio frames that is numbered even number, remaining PRACH is mapped on the radio frames that is numbered odd number;

√ method 2.4

Will pRACH be mapped on the radio frames that is numbered odd number, remaining PRACH is mapped on the radio frames that is numbered even number.

when D>0.5PRACH/10ms

All PRACH are mapped on each radio frames.

■ field mapping: will be assigned to a PRACH on radio frames and be mapped on the 5ms field;

while in a radio frames, 1 downstream-to-upstream transfer point being arranged (as shown in Figure 3)

Be mapped in first field and (be equivalent to that " downstream-to-upstream turns being mapped to all PRACH in this radio frames

Change the field at a place " or " field at sub-frame of uplink place ").

while in a radio frames, 2 downstream-to-upstream transfer points being arranged (as shown in Figure 4)

The PRACH be mapped on this radio frames is divided into to two groups, is mapped to respectively on first and second field.

● method 1

For the PRACH be mapped on this radio frames, by number

ascending or descending, compartment of terrain is mapped to PRACH on first and second field.

If the PRACH that will be mapped on this radio frames numbers according to it ascending renumbeing, obtain

q is the quantity that is mapped to the PRACH on this radio frames.

Order n wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames, and

represent respectively the quantity of the PRACH of certain form that first field and second field hold on time domain.For example, for preamble format 0, if D: U=3: 5, first field can hold 3 PRACH on time domain,

second field can hold 2 PRACH on time domain,

as shown in Figure 5.For another example, for preamble format 4, if the transfer point of 2 downstream-to-upstreams is arranged in 10ms, each field has a UpPTS,

as shown in Figure 6.

Concrete method can be:

√ method 1.1

Will

for the PRACH of even number is mapped on first field,

for the PRACH of odd number is mapped on second field;

√ method 1.2

for the PRACH of even number is mapped on second field,

for the PRACH of odd number is mapped on first field.

● method 2

For the PRACH be mapped on this radio frames, by number

size, the first half PRACH is mapped on first or second field, by later half PRACH be mapped to second or first field on;

If the PRACH that will be mapped on this radio frames numbers according to it ascending renumbeing, obtain

q is the quantity that is mapped to the PRACH on this radio frames.

, when D>0.5PRACH/10ms, concrete method can be

√ method 2.1

pRACH be mapped on first field, on this radio frames, remaining PRACH is mapped on second field;

√ method 2.2

pRACH be mapped on first field, on this radio frames, remaining PRACH is mapped on second field;

√ method 2.3

pRACH be mapped on second field, on this radio frames, remaining PRACH is mapped on first field;

√ method 2.4

pRACH be mapped on second field, on this radio frames, remaining PRACH is mapped on first field;

when D=0.5PRACH/10ms, concrete method can be

√ method 2.5

Will

pRACH be mapped on first field, remaining PRACH on this radio frames is mapped on second field;

√ method 2.6

Will

pRACH be mapped on second field, remaining PRACH on this radio frames is mapped on first field;

√ method 2.7

Will

pRACH be mapped on first field, remaining PRACH on this radio frames is mapped on second field;

√ method 2.8

Will

pRACH be mapped on second field, remaining PRACH on this radio frames is mapped on first field;

● method 3

PRACH for being mapped on this radio frames, press

ascending or descending, compartment of terrain is mapped to Physical Random Access Channel on first and second field, wherein, if by Physical Random Access Channel according to it

ascending renumbeing, obtain (mode renumberd can be

), Q is the quantity that is mapped to the Physical Random Access Channel on radio frames, when leading form is 0 and D _rA≤ 3 o'clock, order otherwise, order $M_{\mathrm{RA}}^{\mathrm{ind}}=N_{\mathrm{RA}}^{\′\mathrm{ind}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right),$ N wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames,

and

represent respectively the quantity of the Physical Random Access Channel of a kind of form that first field and second field hold on time domain, will

for the Physical Random Access Channel of even number is mapped on first field,

for the Physical Random Access Channel of odd number is mapped on second field; Perhaps will

for the Physical Random Access Channel of even number is mapped on second field,

for the Physical Random Access Channel of odd number is mapped on first field.Perhaps

PRACH for being mapped on this radio frames, press

ascending or descending, compartment of terrain is mapped to Physical Random Access Channel on first and second field, wherein, if by Physical Random Access Channel according to it

ascending renumbeing, obtain

(mode renumberd can be

), Q is the quantity that is mapped to the Physical Random Access Channel on radio frames, when leading form is 0 and D _rA=2 o'clock, order $M_{\mathrm{RA}}^{\mathrm{ind}}=N_{\mathrm{RA}}^{\′\mathrm{ind}},$ Otherwise, order $M_{\mathrm{RA}}^{\mathrm{ind}}=N_{\mathrm{RA}}^{\′\mathrm{ind}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right),$ N wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames,

and represent respectively the quantity of the Physical Random Access Channel of a kind of form that first field and second field hold on time domain, will

for the Physical Random Access Channel of even number is mapped on first field,

for the Physical Random Access Channel of odd number is mapped on second field; Perhaps will

for the Physical Random Access Channel of even number is mapped on second field, for the Physical Random Access Channel of odd number is mapped on first field.Perhaps

PRACH for being mapped on this radio frames, press ascending or descending, compartment of terrain is mapped to Physical Random Access Channel on first and second field, wherein, if by Physical Random Access Channel according to it ascending renumbeing, obtain

(mode renumberd can be

), Q is the quantity that is mapped to the Physical Random Access Channel on radio frames, order $M_{\mathrm{RA}}^{\mathrm{ind}}=N_{\mathrm{RA}}^{\′\mathrm{ind}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right),$ N wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames,

and

represent respectively the quantity of the Physical Random Access Channel of a kind of form that first field and second field hold on time domain, will

for the Physical Random Access Channel of even number is mapped on first field,

for the Physical Random Access Channel of odd number is mapped on second field; Perhaps will

for the Physical Random Access Channel of even number is mapped on second field,

for the Physical Random Access Channel of odd number is mapped on first field.Perhaps

For example, for preamble format 0, if D: U=3: 5, first field can hold 3 PRACH on time domain,

second field can hold 2 PRACH on time domain,

as shown in Figure 5.For another example, for preamble format 4, if the transfer point of 2 downstream-to-upstreams is arranged in 10ms, each field has a UpPTS, $N_{\mathrm{RA}}^{\mathrm{HF}}\left(0\right)=N_{\mathrm{RA}}^{\mathrm{HF}}\left(1\right)=1,$ As shown in Figure 6.

Concrete method can be:

√ method 3.1

Will

for the PRACH of even number is mapped on first field,

for the PRACH of odd number is mapped on second field;

√ method 3.2

for the PRACH of even number is mapped on second field,

for the PRACH of odd number is mapped on first field.

■ subframe mapping: will be assigned to a PRACH on field and be mapped on sub-frame of uplink;

for preamble format 4,

The all PRACH that are assigned on this field are mapped on the UpPTS of this field;

for preamble format 0～3,

● method 1

By number

ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from front to back, circularly, until the PRACH be assigned on this field all shone upon, and on time domain adjacent two PRACH are uniformly-spaced.

On time domain, the interval of adjacent two PRACH refers to the interval between the starting position of first sub-frame of uplink at the end position of last sub-frame of uplink at previous PRACH place and a rear PRACH place.

" cyclic mapping " refers to if remaining sub-frame of uplink can not hold a PRACH, come back to the starting position of mapping in the process of mapping from front to back, mapping from front to back.

√ method 1.1

By number

ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from front to back, circularly, and on time domain, two adjacent PRACH are spaced apart 0.

√ method 1.2

By number ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from front to back, circularly.If the sub-frame of uplink number that PRACH accounts for is L, the quantity that is mapped to the PRACH on this field is P, and the sub-frame of uplink number of current field is

on time domain, two adjacent PRACH are spaced apart

● method 2

By number

ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from back to front, circularly, until the PRACH be assigned on this field all shone upon, and on time domain adjacent two PRACH are uniformly-spaced.

On time domain, the interval of adjacent two PRACH refers to the interval between the end position of last sub-frame of uplink at the starting position of first sub-frame of uplink at previous PRACH place and a rear PRACH place.

" cyclic mapping " refers to if remaining sub-frame of uplink can not hold a PRACH, come back to the starting position of mapping in the process of mapping from back to front, mapping from back to front.

√ method 2.1

By number

ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from back to front, circularly, and on time domain, two adjacent PRACH are spaced apart 0.

√ method 2.2

By number

ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from back to front, circularly.If the sub-frame of uplink number that PRACH accounts for is L, the quantity that is mapped to the PRACH on this field is P, and the sub-frame of uplink number of current field is on time domain, two adjacent PRACH are spaced apart

◆ frequency domain mapping: if (a PRACH accounts for L sub-frame of uplink on time domain, the time-domain position that is mapped to the Physical Random Access Channel on this L sub-frame of uplink is identical), the PRACH be mapped on this L sub-frame of uplink is shone upon to (for preamble format 4, the sub-frame of uplink here is UpPTS) on frequency domain

● method one

By number

ascendingly or descending successively PRACH is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a PRACH accounts for 6 RB, and on frequency domain the adjacent shared frequency band zero lap of two PRACH.

● method two

By number

ascendingly or descending successively PRACH is shone upon to both sides from centre in available frequency resource, a PRACH accounts for 6 RB, and on frequency domain the adjacent shared frequency band zero lap of two PRACH.

● method three

In can be used for transmitting the frequency domain resource of PRACH, the identical PRACHs by the r of version number, from the low frequency to the high frequency or from the high frequency to the low frequency, shone upon, a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number.

Such as,

wherein 0,6, the corresponding r of version number is identical, and 4,8, the corresponding r of version number is identical, and 0,6 shines upon from the low frequency to frequency modulation; 4,8 shine upon too from the low frequency to the high frequency, and final, 0 is identical with 4 frequency domain position, and 6 is identical with 8 frequency domain position.

● method four

By the r of version number, identical Physical Random Access Channel shines upon to centre from both sides in can be used for transmitting the frequency domain resource of PRACH.

Suppose and be mapped on this L subframe, the Physical Random Access Channel that version number is r has W, be numbered, and w=0,1,2 ..., W-1, mapping method can be:

W is shining upon from high frequency (or low frequency) to low frequency (or high frequency) in available band of even number, for shining upon from low frequency (or high frequency) to high frequency (or low frequency) in available band of odd number, and a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number; Or

The first half (

or

or

or

) PRACH shines upon from high frequency (or low frequency) to low frequency (or high frequency) in available band, later half PRACH shines upon from low frequency (or high frequency) to high frequency (or low frequency) in available band, and a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number; Such as, the PRACH form is preamble format 0, L=1, index

pRACH be mapped to some sub-frame of uplink, wherein 0,4,6, the corresponding identical r=0 of version number, 8,9,10, the corresponding identical r=1 of version number, for r=0, w=0,1,2 for 0,4,6; For r=1, w=0,1,2 correspondence 8,9,10.If what be odd number by w shines upon in available band from the low frequency to the high frequency, what by w, be even number shines upon to low frequency from high frequency in available band, mapping result as shown in figure 12, wherein

be that 0,8 PRACH frequency domain position is identical;

be that 4,9 PRACH frequency domain position is identical;

be that 6,10 PRACH frequency domain position is identical.

● method five

Press

ascendingly or descending in available frequency resource, from both sides, to centre, shine upon.For example, the Physical Random Access Channel be mapped on this L subframe has W, according to

ascending or descending renumbeing as, w=0,1,2 ..., W-1, mapping method can be

W is shining upon from high frequency (or low frequency) to low frequency (or high frequency) in available band by w is ascending or descending of even number, press for odd number that w is ascending or descending to be shone upon from low frequency (or high frequency) to high frequency (or low frequency) in available band, and a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; Or

The first half (

or

or

or

) PRACH presses that w is ascending or descending to be shone upon from high frequency (or low frequency) to low frequency (or high frequency) in available band, later half PRACH presses that w is ascending or descending to be shone upon from low frequency (or high frequency) to high frequency (or low frequency) in available band, and a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.

● method six

The all Physical Random Access Channels r of version number is identical, that be mapped on a sub-frame of uplink or UpPTS are shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, and the sub-frame of uplink on adjacent two fields or UpPTS adopt different mapping orders.A Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number; Concrete mapping method is

In the even number radio frames, the sub-frame of uplink of first field or UpPTS shine upon to high frequency from the low frequency of available band; The sub-frame of uplink of second field or UpPTS shine upon to low frequency from the high frequency of available band; In the odd number radio frames, the sub-frame of uplink of first field or UpPTS shine upon to low frequency from the high frequency of available band; The sub-frame of uplink of second field or UpPTS shine upon to high frequency from the low frequency of available band; Or

In the odd number radio frames, the sub-frame of uplink of first field or UpPTS shine upon to high frequency from the low frequency of available band; The sub-frame of uplink of second field or UpPTS shine upon to low frequency from the high frequency of available band; In the even number radio frames, the sub-frame of uplink of first field or UpPTS shine upon to low frequency from the high frequency of available band; The sub-frame of uplink of second field or UpPTS shine upon to high frequency from the low frequency of available band; Or

According to the quantity of UpPTS in a radio frames, shone upon

The situation that two UpPTS are arranged for a radio frames,

Shine upon to high frequency from low frequency in the inherent available band of sub-frame of uplink in first field or UpPTS, shine upon to low frequency from high frequency in the sub-frame of uplink in second field or the inherent available band of UpPTS, each radio frames adopts identical mapping method; Or

Shine upon to low frequency from high frequency in the inherent available band of sub-frame of uplink in first field or UpPTS, shine upon to high frequency from low frequency in the sub-frame of uplink in second field or the inherent available band of UpPTS, each radio frames adopts identical mapping method;

The situation that a UpPTS is arranged for a radio frames

In the sub-frame of uplink or UpPTS of even number radio frames, in available band, from low frequency, to high frequency, shine upon, in the sub-frame of uplink or UpPTS of odd number radio frames, in available band, from high frequency, to low frequency, shine upon; Or

In the sub-frame of uplink or UpPTS of odd number radio frames, in available band, from low frequency, to high frequency, shine upon, in the sub-frame of uplink or UpPTS of even number radio frames, in available band, from high frequency, to low frequency, shine upon; Or

In the sub-frame of uplink or UpPTS of all radio frames, in available band, from low frequency, to high frequency, shine upon; Or

In the sub-frame of uplink or UpPTS of all radio frames, in available band, from low frequency, to high frequency, shine upon; Or

In the sub-frame of uplink or uplink pilot time slot of all radio frames, in available band, from both sides, to centre, shine upon.

For common sub-frame of uplink, the available frequency domain resource of PRACH refers to the frequency resource except the frequency resource shared by PUCCH in all available frequency domain resources of current system, or all available frequency resources of current system; For UpPTS, the available frequency domain resource of PRACH refers to all available frequency resources of current system, or the frequency resource except the shared frequency resource of the PUCCH by common sub-frame of uplink in all available frequency domain resources, as shown in Figure 7.

Density D is directly notified mobile phone by base station by the control signal of PRACH;

Version number R has three kinds of methods to obtain.

√, by issued the PRACH preparation kind of mobile phone by base station, determines according to the version number of preamble format and density combinations in PRACH preparation set; Or

The PRACH quantity that the √ version number is supported at frequency domain according to system

the quantity N of 10ms internal conversion point _sPand the density D of PRACH, through type obtain;

The √ version number is

limiting its maximum is 3; The r of version number has two kinds of methods to obtain

√ directly obtains by the PRACH preparation kind of being issued mobile phone by base station;

√ is according to community ID calculated version number,

√ and r ∈ [0, R-1]

While utilizing method provided by the invention to carry out PRACH, frequently position mapping can make to need same base station to process PRACH to be uniformly distributed in time, can also to reduce to greatest extent the presence of intercell interference of Equations of The Second Kind PRACH simultaneously.

Embodiment mono-

The density of supposing PRACH is D (D can get 0.5,1,2,3,4,5,6 or 10PRACH/10ms); Version number is R; Be numbered

the index of certain community available PRACH in a random access period be d (can be described as PRACH index or density index in community,

); Version number is r (r ∈ [0, R-1]); In the 10ms radio frames, the number of downstream-to-upstream transfer point is N _sP; Certain form PRACH quantity that in field, time domain is held is

● the PRACH numbering: first increase progressively the density index during numbering, then increment version,

wherein

r=0,1 ..., R-1;

● the time domain mapping

the radio frames mapping

when D=0.5PRACH/10ms

, for the PRACH of even number is mapped on the radio frames that is numbered even number, the PRACH that is numbered odd number is mapped on the radio frames that is numbered odd number (or r);

when D>0.5PRACH/10ms

All PRACH are mapped on each radio frames.

the field mapping

If the PRACH that will be mapped on this radio frames numbers according to it ascending renumbeing, obtain q is the quantity that is mapped to the PRACH on this radio frames.The algorithm renumberd can be

the mod 2 of α=(2D) wherein;

Order

n wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames,

and represent respectively the quantity of the PRACH of certain form that first field and second field hold on time domain.

Will

for the PRACH of even number is mapped to first field, be second field that be mapped to of odd number;

the subframe mapping

for preamble format 4,

The all PRACH that are assigned on this field are mapped on the UpPTS of this field;

for preamble format 0～3,

By number

ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from back to front, circularly, and on time domain, two adjacent PRACH are spaced apart 0.

● the frequency domain mapping

for preamble format 0～4

Time-domain position and the identical Physical Random Access Channel of the r of version number are shone upon to centre from both sides in can be used for sending the frequency resource of Physical Random Access Channel.

Suppose that time-domain position is identical, and the Physical Random Access Channel that version number is r has W, numbering is respectively w=0,1,2, ..., W-1, mapping method is that w is shining upon to high frequency from low frequency in can be used for sending the frequency resource of Physical Random Access Channel by w is ascending of even number, for shining upon to low frequency from high frequency in can be used for sending the frequency resource of Physical Random Access Channel by w is ascending of odd number, and a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number.

Above-mentioned mapping principle can be used following equation expression:

Time domain mapping formula:

$M_{\mathrm{ind}}^{\mathrm{RA}}=N_{\mathrm{ind}}^{\′\mathrm{RA}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

$t_0^{\mathrm{RA}}=\mathrm{\α}[\left(N_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}2\right)+1]$

$t_1^{\mathrm{RA}}=M_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}{N}_{\mathrm{SP}}$

Frequency domain mapping formula:

Wherein

√

determined PRACH is in which radio frames, 0 represents each radio frames, and 1 represents the even number radio frames, and 2 represent the odd number radio frames; In addition, during due to D=0.5,

so also can be write as $t_0^{\mathrm{RA}}=\mathrm{\α}[\left(r\mathrm{mod}2\right)+1].$

√

determined PRACH is at which field, 0 represents first field, and 1 represents second field.

√

represent the original position of PRACH in certain field, i.e. from which sub-frame of uplink (owing to only having at most a UpPTS in a field, so the PRACH that form is preamble format 4 also can not need this amount), for example

expression is since the 1st sub-frame of uplink.

√ k _rAcfor first available frequency domain resource piece of certain Physical Random Access Channel (RB, Resource Block), and

for up RB sum.

The mod 2 of √ α=(2D); Density index (or being called the access chance index in community) is

the density that D is Physical Random Access Channel, pass through the signaling mobile phone by base station.

The version index that √ r is certain community, and r ∈ [0, R-1]

√

be the frequency domain map index (numbering of PRACH on frequency domain) of certain form PRACH, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-1;$ Its implication is: version number is r, and time-domain position by

the numbering of determined all PRACH, k ' _rAfor low frequency first can be used for the RB of PRACH position (

),

for version number is r, and time-domain position by

the quantity of determined all PRACH.

The PRACH that √ is preamble format 0～3 for form, L is the shared sub-frame of uplink quantity of this form PRACH, quantity for sub-frame of uplink in field; For preamble format 4, L=1,

for the number (1 or 0) of UpPTS in field, i=0 is first field, and i=1 is the 2nd field, and

√ N _sPfor the quantity of downstream-to-upstream transfer point, it equals the quantity of UpPTS.

In addition,

√ is for preamble format 0～3, and R can, by issued the PRACH preparation kind of mobile phone by base station, determine according to the version number of preamble format and density combinations in PRACH preparation set; For preamble format 4,

under current system bandwidth, the quantity of the open ended PRACH of frequency domain; Or be

or, by issued the PRACH preparation kind of mobile phone by base station, according to the version number of preamble format and density combinations in PRACH preparation set, determine.

√ is for preamble format 0～3, and r can directly obtain by the PRACH preparation kind of being issued mobile phone by base station; For preamble format 4,

or directly obtain by the PRACH preparation kind of being issued mobile phone by base station.r∈[0，R-1]

Illustrate the mapping result of the present embodiment

if R=3, D=4, the form of PRACH is preamble format 0, D: U=1: 3,

respectively corresponding (0,0), (0,1), (0,2), (0,3), (1,0), (1,1), (1,2), (1,3), (2,0), (2,1), (2,2), (2,3).

corresponding (0,2),

corresponding (2,0),

corresponding (0,0),

corresponding (1,2),

corresponding (1,0), corresponding (2,2), corresponding (0,3), corresponding (2,1),

corresponding (0,1),

corresponding (1,3),

corresponding (1,1), corresponding (2,3).k′ _RA＝1。The time, frequently the position mapping result as shown in Figure 8, wherein the frequency domain position of (0,0) (1,2) is identical; The frequency domain position of (0,2) (2,0) is identical; The frequency domain position of (1,1) (2,3) is identical; The frequency domain position of (0,3) (2,1) is identical; The frequency domain position of (1,3) (0,1) is identical; The frequency domain position of (1,0) (2,2) is identical;

if R=1, D=4, the form of PRACH is preamble format 4, D: U=1: 3,

respectively corresponding (0,0), (0,1), (0,2), (0,3).

respectively corresponding (0,0), (0,2) or (0,2), (0,0), and

respectively corresponding (0,1), (0,3) or (0,3), (0,1), and

k ' _rA=0.The time, frequently the position mapping result is as shown in Figure 9.

Embodiment bis-

The density of supposing PRACH is D (D can get 0.5,1,2,3,4,5,6 or 10PRACH/10ms); Version number is R; Be numbered

the index of certain community available PRACH in a random access period be d (can be described as PRACH index or density index in community,

); Version number is r (r ∈ [0, R-1]); In the 10ms radio frames, the number of downstream-to-upstream transfer point is N _sP; Certain form PRACH quantity that in field, time domain is held is

● the PRACH numbering: first increase progressively the density index during numbering, then increment version,

wherein

r=0,1 ..., R-1.

● the time domain mapping

the radio frames mapping

when D=0.5PRACH/10ms

, for the PRACH of even number is mapped on the radio frames that is numbered even number, the PRACH that is numbered odd number is mapped on the radio frames that is numbered odd number (or r);

when D>0.5PRACH/10ms

All PRACH are mapped on each radio frames.

the field mapping

If the PRACH that will be mapped on this radio frames numbers according to it

ascending renumbeing, obtain

q is the quantity that is mapped to the PRACH on this radio frames.The algorithm renumberd can be the mod 2 of α=(2D) wherein;

Order

n wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames,

and

represent respectively the quantity of the PRACH of certain form that first field and second field hold on time domain.

Will

for the PRACH of even number is mapped to first field, be second field that be mapped to of odd number;

the subframe mapping

for preamble format 4,

The all PRACH that are assigned on this field are mapped on the UpPTS of this field;

for preamble format 0～3,

By number

ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from back to front, circularly, and on time domain, two adjacent PRACH are spaced apart 0.

● the frequency domain mapping

for preamble format 0～3

Time-domain position and the identical Physical Random Access Channel of the r of version number are shone upon to centre from both sides in can be used for sending the frequency resource of Physical Random Access Channel.

Suppose that time-domain position is identical, and the Physical Random Access Channel that version number is r has W, numbering is respectively w=0,1,2, ..., W-1, mapping method is that w is shining upon to high frequency from low frequency in can be used for sending the frequency resource of Physical Random Access Channel by w is ascending of even number, for shining upon to low frequency from high frequency in can be used for sending the frequency resource of Physical Random Access Channel by w is ascending of odd number, and a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number;

for preamble format 4

The r of version number is identical, be mapped to Physical Random Access Channel on certain UpPTS and shone upon from the low frequency to the high frequency or from the high frequency to the low frequency in can be used for sending the frequency resource of Physical Random Access Channel, and adjacent two UpPTS adopt different mapping orders.A Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number.Specifically

the situation that two UpPTS are arranged for a radio frames,

First UpPTS inherence can be used for sending in the frequency resource of Physical Random Access Channel to be shone upon to high frequency from low frequency, and second UpPTS inherence can be used for sending in the frequency resource of Physical Random Access Channel to be shone upon to low frequency from high frequency;

the situation that a UpPTS is arranged for a radio frames,

In the UpPTS of even number radio frames, in can be used for sending the frequency resource of Physical Random Access Channel, from low frequency, to high frequency, shine upon, in the UpPTS of odd number radio frames, in can be used for sending the frequency resource of Physical Random Access Channel, from high frequency, to low frequency, shine upon.

Above-mentioned mapping principle can be used following equation expression:

Time domain mapping formula:

$M_{\mathrm{ind}}^{\mathrm{RA}}=N_{\mathrm{ind}}^{\′\mathrm{RA}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

$t_0^{\mathrm{RA}}=\mathrm{\α}[\left(N_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}2\right)+1]$

$t_1^{\mathrm{RA}}=M_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}{N}_{\mathrm{SP}}$

Frequency domain mapping formula:

for preamble format 0～3

for preamble format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}(\left(\mathrm{SFN}\mathrm{mod}2\right)\·(2-N_{\mathrm{SP}})+t_{\mathrm{RA}}^1)\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Wherein

√ determined PRACH is in which radio frames, 0 represents each radio frames, and 1 represents the even number radio frames, and 2 represent the odd number radio frames; In addition, during due to D=0.5,

so

also can be write as $t_0^{\mathrm{RA}}=\mathrm{\α}[\left(r\mathrm{mod}2\right)+1].$

√ determined PRACH is at which field, 0 represents first field, and 1 represents second field.

√

represent the original position of PRACH in certain field, i.e. from which sub-frame of uplink (owing to only having at most a UpPTS in a field, so the PRACH that form is preamble format 4 also can not need this amount), for example

expression is since the 1st sub-frame of uplink.

√ kRA is first available frequency domain resource piece of certain Physical Random Access Channel (RB, Resource Block), and

for up RB sum.

The mod 2 of √ α=(2D); Density index (or being called the access chance index in community) is the density that D is Physical Random Access Channel, pass through the signaling mobile phone by base station.

The version index that √ r is certain community, and r ∈ [0, R-1]

√

be the frequency domain map index (numbering of PRACH on frequency domain) of certain form PRACH, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-1;$ Its implication is: version number is r, and time-domain position by the numbering of determined all PRACH, k ' _rAfor low frequency, first can be used for PRACH's

for version number is r, and time-domain position by

the quantity of determined all PRACH.

The PRACH that √ is preamble format 0～3 for form, L is the shared sub-frame of uplink quantity of this form PRACH,

quantity for sub-frame of uplink in field; For preamble format 4, L=1, for the number (1 or 0) of UpPTS in field, i=0 is first field, and i=1 is the 2nd field, and

√ N _sPfor the quantity of downstream-to-upstream transfer point, it equals the quantity of UpPTS.

√ SFN is System Frame Number or is called radio frame number (System Frame Number)

In addition,

√ is for preamble format 0～3, and R can, by issued the PRACH preparation kind of mobile phone by base station, determine according to the version number of preamble format and density combinations in PRACH preparation set; For preamble format 4,

under current system bandwidth, the quantity of the open ended PRACH of frequency domain; Or be

or, by issued the PRACH preparation kind of mobile phone by base station, according to the version number of preamble format and density combinations in PRACH preparation set, determine.

√ is for preamble format 0～3, and r can directly obtain by the PRACH preparation kind of being issued mobile phone by base station; For preamble format 4,

or directly obtain r ∈ [0, R-1] by the PRACH preparation kind of being issued mobile phone by base station.

Illustrate the mapping result of the present embodiment

if R=1, D=3, the form of PRACH is preamble format 4, D: U=8: 2 (downstream-to-upstream transfer point, i.e. N _sP=1),

respectively corresponding (0,0), (0,1), (0,2). these three PRACH that corresponding version number is 0, and corresponding relation can be arbitrarily, such as can distinguish corresponding (0,0), (0,1), (0,2), also can distinguish corresponding (0,0), (0,2), (0,1).k′ _RA＝0。The time, frequently the position mapping result is as shown in figure 10.

if R=1, D=4, the form of PRACH is preamble format 4, D: U=1: 3,

respectively corresponding (0,0), (0,1), (0,2), (0,3).

corresponding version number is 0, is mapped to two PRACH of UpPTS in first field, and corresponding relation can be arbitrarily, such as

can distinguish corresponding (0,0), (0,2) or (0,2), (0,0). corresponding version number is 0, is mapped to two PRACH of UpPTS in second field, and corresponding relation can be arbitrarily, such as

can distinguish corresponding (0,1), (0,3) or (0,3), (0,1).K ' _rA=0 o'clock, the position mapping result as shown in figure 11 frequently.

Embodiment tri-

The density of supposing PRACH is D (D can get 0.5,1,2,3,4,5,6 or 10PRACH/10ms); Version number is R; Be numbered

the index of certain community available PRACH in a random access period be d (can be described as PRACH index or density index in community,

); Version number is r (r ∈ [0, R-1]); In the 10ms radio frames, the number of downstream-to-upstream transfer point is N _sP; Certain form PRACH quantity that in field, time domain is held is

The PRACH numbering: first increase progressively the density index during numbering, then increment version,

wherein r=0,1 ..., R-1.

● the time domain mapping

the radio frames mapping

when D=0.5PRACH/10ms

, for the PRACH of even number is mapped on the radio frames that is numbered even number, the PRACH that is numbered odd number is mapped on the radio frames that is numbered odd number (or r);

when D>0.5PRACH/10ms

All PRACH are mapped on each radio frames.

the field mapping

If the PRACH that will be mapped on this radio frames numbers according to it

ascending renumbeing, obtain

q is the quantity that is mapped to the PRACH on this radio frames.The algorithm renumberd can be

the mod 2 of α=(2D) wherein.

Order

n wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames, and

represent respectively the quantity of the PRACH of certain form that first field and second field hold on time domain.

Will

for the PRACH of even number is mapped to first field, be second field that be mapped to of odd number;

the subframe mapping

for preamble format 4,

The all PRACH that are assigned on this field are mapped on the UpPTS of this field;

for preamble format 0～3,

By number

ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from back to front, circularly, and on time domain, two adjacent PRACH are spaced apart 0.

● the frequency domain mapping

for preamble format 0～3

Time-domain position and the identical Physical Random Access Channel of the r of version number are shone upon to centre from both sides in can be used for sending the frequency resource of Physical Random Access Channel.

Suppose that time-domain position is identical, and the Physical Random Access Channel that version number is r has W, numbering is respectively w=0,1,2, ..., W-1, mapping method is that w is shining upon to high frequency from low frequency in can be used for sending the frequency resource of Physical Random Access Channel by w is ascending of even number, for shining upon to low frequency from high frequency in can be used for sending the frequency resource of Physical Random Access Channel by w is ascending of odd number, and a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number.

for preamble format 4

The r of version number is identical, be mapped to Physical Random Access Channel on certain UpPTS and shone upon from the low frequency to the high frequency or from the high frequency to the low frequency in can be used for sending the frequency resource of Physical Random Access Channel, and adjacent two UpPTS adopt different mapping orders.A Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number.Specifically

In the even number radio frames, the UpPTS of first field shines upon to high frequency from low frequency in can be used for sending the frequency resource of Physical Random Access Channel; The UpPTS of second field shines upon to low frequency from high frequency in can be used for sending the frequency resource of Physical Random Access Channel; In the odd number radio frames, the UpPTS of first field shines upon to low frequency from high frequency in can be used for sending the frequency resource of Physical Random Access Channel; The UpPTS of second field shines upon to high frequency from low frequency in can be used for sending the frequency resource of Physical Random Access Channel.

Above-mentioned mapping principle can be used following equation expression:

Time domain mapping formula:

$M_{\mathrm{ind}}^{\mathrm{RA}}=N_{\mathrm{ind}}^{\′\mathrm{RA}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

$t_0^{\mathrm{RA}}=\mathrm{\α}[\left(N_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}2\right)+1]$

$t_1^{\mathrm{RA}}=M_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}{N}_{\mathrm{SP}}$

Frequency domain mapping formula:

for preamble format 0～3

for preamble format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}(\left(\mathrm{SFN}\mathrm{mod}2\right)+t_{\mathrm{RA}}^1)\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Wherein

√

determined PRACH is in which radio frames, 0 represents each radio frames, and 1 represents the even number radio frames, and 2 represent the odd number radio frames; In addition, during due to D=0.5,

so

also can be write as $t_0^{\mathrm{RA}}=\mathrm{\α}[\left(r\mathrm{mod}2\right)+1].$

√

determined PRACH is at which field, 0 represents first field, and 1 represents second field.

√

represent the original position of PRACH in certain field, i.e. from which sub-frame of uplink (owing to only having at most a UpPTS in a field, so the PRACH that form is preamble format 4 also can not need this amount), for example

expression is since the 1st sub-frame of uplink.

√ k _rAfor first available frequency domain resource piece of certain Physical Random Access Channel (RB, Resource Block), and

for up RB sum.

The mod 2 of √ α=(2D); Density index (or being called the access chance index in community) is the density that D is Physical Random Access Channel, pass through the signaling mobile phone by base station.

The version index that √ r is certain community, and r ∈ [0, R-1]

√

be the frequency domain map index (numbering of PRACH on frequency domain) of certain form PRACH, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-1;$ Its implication is: version number is r, and time-domain position by

the numbering of determined all PRACH, k ' _rAfor low frequency, first can be used for PRACH's $\mathrm{RB}(k_{\mathrm{RA}}^{\′}\∈[0,N_{\mathrm{RB}}^{\mathrm{UL}}-6\left]\right),$ $N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)$ For version number is r, and time-domain position by

the quantity of determined all PRACH.

The PRACH that √ is preamble format 0～3 for form, L is the shared sub-frame of uplink quantity of this form PRACH,

quantity for sub-frame of uplink in field; For preamble format 4, L=1,

for the number (1 or 0) of UpPTS in field, i=0 is first field, and i=1 is the 2nd field, and

√ N _sPfor the quantity of downstream-to-upstream transfer point, it equals the quantity of UpPTS.

√ SFN is System Frame Number or is called radio frame number (System Frame Number)

In addition,

√ is for preamble format 0～3, and R can, by issued the PRACH preparation kind of mobile phone by base station, determine according to the version number of preamble format and density combinations in PRACH preparation set; For preamble format 4,

under current system bandwidth, the quantity of the open ended PRACH of frequency domain; Or be

or, by issued the PRACH preparation kind of mobile phone by base station, according to the version number of preamble format and density combinations in PRACH preparation set, determine.

√ is for preamble format 0～3, and r can directly obtain by the PRACH preparation kind of being issued mobile phone by base station.For preamble format 4,

or directly obtain r ∈ [0, R-1] by the PRACH preparation kind of being issued mobile phone by base station.

√ illustrates the mapping result of the present embodiment

If √ is R=1, D=3, the form of PRACH is preamble format 4, D: U=8: 2 (downstream-to-upstream transfer point, i.e. N _sP=1),

respectively corresponding (0,0), (0,1), (0,2).

these three PRACH that corresponding version number is 0, and corresponding relation can be arbitrarily, such as

can distinguish corresponding (0,0), (0,1), (0,2), also can distinguish corresponding (0,0), (0,2), (0,1).k′ _RA＝0。The time, frequently the position mapping result is as shown in figure 10.

If √ is R=1, D=4, the form of PRACH is preamble format 4, D: U=1: 3,

respectively corresponding (0,0), (0,1), (0,2), (0,3).

corresponding version number is 0, is mapped to two PRACH of UpPTS in first field, and corresponding relation can be arbitrarily, such as can distinguish corresponding (0,0), (0,2) or (0,2), (0,0).

corresponding version number is 0, is mapped to two PRACH of UpPTS in second field, and corresponding relation can be arbitrarily, such as can distinguish corresponding (0,1), (0,3) or (0,3), (0,1).k′ _RA＝0。The time, frequently the position mapping result is as shown in figure 12.

Embodiment tetra-

The density of supposing PRACH is D (D can get 0.5,1,2,3,4,5,6 or 10PRACH/10ms); Version number is R; Be numbered

the index of certain community available PRACH in a random access period be d (can be described as PRACH index or density index in community,

); Version number is r (r ∈ [0, R-1]); In the 10ms radio frames, the number of downstream-to-upstream transfer point is N _sP; Certain form PRACH quantity that in field, time domain is held is

● the PRACH numbering: first increase progressively the density index during numbering, then increment version,

wherein

r=0,1 ..., R-1;

● the time domain mapping

the radio frames mapping

when D=0.5PRACH/10ms

, for the PRACH of even number is mapped on the radio frames that is numbered even number, the PRACH that is numbered odd number is mapped on the radio frames that is numbered odd number (or r);

when D>0.5PRACH/10ms

All PRACH are mapped on each radio frames.

the field mapping

If the PRACH that will be mapped on this radio frames numbers according to it

ascending renumbeing, obtain

q is the quantity that is mapped to the PRACH on this radio frames.The algorithm renumberd can be

the mod 2 of α=(2D) wherein;

Order

n wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames,

and represent respectively the quantity of the PRACH of certain form that first field and second field hold on time domain.

Will

for the PRACH of even number is mapped to first field, be second field that be mapped to of odd number;

the subframe mapping

for preamble format 4,

The all PRACH that are assigned on this field are mapped on the UpPTS of this field;

for preamble format 0～3,

By number ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from back to front, circularly, and on time domain, two adjacent PRACH are spaced apart 0.

● the frequency domain mapping

for preamble format 0～3

Time-domain position and the identical Physical Random Access Channel of the r of version number are shone upon to centre from both sides in can be used for sending the frequency resource of Physical Random Access Channel.

Suppose that time-domain position is identical, and the Physical Random Access Channel that version number is r has W, numbering is respectively w=0,1,2, ..., W-1, mapping method is that w is shining upon to high frequency from low frequency in can be used for sending the frequency resource of Physical Random Access Channel by w is ascending of even number, for shining upon to low frequency from high frequency in can be used for sending the frequency resource of Physical Random Access Channel by w is ascending of odd number, and a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number.

for preamble format 4

Suppose that the Physical Random Access Channel be mapped on certain UpPTS has W, according to

ascending renumbeing as, w=0,1,2 ..., W-1, mapping method can be

W is shining upon to high frequency from low frequency by w is ascending in available band of even number, for shining upon to low frequency from high frequency by w is ascending in available band of odd number, and a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.

Above-mentioned mapping principle can be used following equation expression:

Time domain mapping formula:

$M_{\mathrm{ind}}^{\mathrm{RA}}=N_{\mathrm{ind}}^{\′\mathrm{RA}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

$t_0^{\mathrm{RA}}=\mathrm{\α}[\left(N_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}2\right)+1]$

$t_1^{\mathrm{RA}}=M_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}{N}_{\mathrm{SP}}$

Frequency domain mapping formula:

for preamble format 0～3

for preamble format 4

Wherein

√

determined PRACH is in which radio frames, 0 represents each radio frames, and 1 represents the even number radio frames, and 2 represent the odd number radio frames; In addition, during due to D=0.5,

so

also can be write as $t_0^{\mathrm{RA}}=\mathrm{\α}[\left(r\mathrm{mod}2\right)+1].$

√ determined PRACH is at which field, 0 represents first field, and 1 represents second field;

√

represent the original position of PRACH in certain field, i.e. from which sub-frame of uplink (owing to only having at most a UpPTS in a field, so the PRACH that form is preamble format 4 also can not need this amount), for example

expression is since the 1st sub-frame of uplink.

√ k _rAfor first available frequency domain resource piece of certain Physical Random Access Channel (RB, Resource Block), and

for up RB sum.

The mod 2 of √ α=(2D); Density index (or being called the access chance index in community) is

the density that D is Physical Random Access Channel, pass through the signaling mobile phone by base station.

The version index that √ r is certain community, and r ∈ [0, R-1]

√ be the frequency domain map index (numbering of PRACH on frequency domain) of the form PRACH that is preamble format 0～3, and have $f_{\mathrm{LRA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{LRA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-1;$ Its implication is: version number is r, and time-domain position by

the numbering of determined all PRACH,

for version number is r, and time-domain position by

the quantity of determined all PRACH.

√ be the frequency domain map index (numbering of PRACH on frequency domain) of the form PRACH that is preamble format 4, and have

√ k ' _rAfor low frequency, first can be used for PRACH's

The PRACH that √ is preamble format 0～3 for form, L is the shared sub-frame of uplink quantity of this form PRACH,

quantity for sub-frame of uplink in field; For preamble format 4, L=1,

for the number (1 or 0) of UpPTS in field, i=0 is first field, and i=1 is the 2nd field, and

√ N _sPfor the quantity of downstream-to-upstream transfer point, it equals the quantity of UpPTS;

√ in addition,

√ is for preamble format 0～3, and R can, by issued the PRACH preparation kind of mobile phone by base station, determine according to the version number of preamble format and density combinations in PRACH preparation set; For preamble format 4,

under current system bandwidth, the quantity of the open ended PRACH of frequency domain; Or be or, by issued the PRACH preparation kind of mobile phone by base station, according to the version number of preamble format and density combinations in PRACH preparation set, determine

√ is for preamble format 0～3, and r can directly obtain by the PRACH preparation kind of being issued mobile phone by base station; For preamble format 4,

or directly obtain r ∈ [0, R-1] by the PRACH preparation kind of being issued mobile phone by base station.

Embodiment five

The density of supposing PRACH is D (D can get 0.5,1,2,3,4,5,6 or 10PRACH/10ms); Version number is R; Be numbered

the index of certain community available PRACH in a random access period be d (can be described as PRACH index or density index in community,

); Version number is r (r ∈ [0, R-1]); In the 10ms radio frames, the number of downstream-to-upstream transfer point is N _sP; Certain form PRACH quantity that in field, time domain is held is

● the PRACH numbering: first increase progressively the density index during numbering, then increment version,

wherein

r=0,1 ..., R-1;

● the time domain mapping

the radio frames mapping

when D=0.5PRACH/10ms

, for the PRACH of even number is mapped on the radio frames that is numbered even number, the PRACH that is numbered odd number is mapped on the radio frames that is numbered odd number (or r);

when D>0.5PRACH/10ms

All PRACH are mapped on each radio frames.

the field mapping

If the PRACH that will be mapped on this radio frames numbers according to it

ascending renumbeing, obtain

q is the quantity that is mapped to the PRACH on this radio frames.The algorithm renumberd can be

the mod 2 of α=(2D) wherein;

Order

n wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames,

and represent respectively the quantity of the PRACH of certain form that first field and second field hold on time domain.

Will

for the PRACH of even number is mapped to first field, be second field that be mapped to of odd number;

the subframe mapping

for preamble format 4,

The all PRACH that are assigned on this field are mapped on the UpPTS of this field;

for preamble format 0～3,

By number

ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from back to front, circularly, and on time domain, two adjacent PRACH are spaced apart 0.

● the frequency domain mapping

for preamble format 0～3

Time-domain position and the identical Physical Random Access Channel of the r of version number are shone upon to centre from both sides in can be used for sending the frequency resource of Physical Random Access Channel.

Suppose that time-domain position is identical, and the Physical Random Access Channel that version number is r has W, numbering is respectively w=0,1,2, ..., W-1, mapping method is that w is shining upon to high frequency from low frequency in can be used for sending the frequency resource of Physical Random Access Channel by w is ascending of even number, for shining upon to low frequency from high frequency in can be used for sending the frequency resource of Physical Random Access Channel by w is ascending of odd number, and a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number;

for preamble format 4

Suppose that the Physical Random Access Channel be mapped on certain UpPTS has W, according to

ascending renumbeing as, w=0,1,2 ..., W-1, mapping method can be

W is shining upon to high frequency from low frequency by w is ascending in available band of even number, for shining upon to low frequency from high frequency by w is descending in available band of odd number, and a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.

Above-mentioned mapping principle can be used following equation expression:

Time domain mapping formula:

$M_{\mathrm{ind}}^{\mathrm{RA}}=N_{\mathrm{ind}}^{\′\mathrm{RA}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

$t_0^{\mathrm{RA}}=\mathrm{\α}[\left(N_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}2\right)+1]$

$t_1^{\mathrm{RA}}=M_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}{N}_{\mathrm{SP}}$

Frequency domain mapping formula:

for preamble format 0～3

for preamble format 4

Wherein

√

determined PRACH is in which radio frames, 0 represents each radio frames, and 1 represents the even number radio frames, and 2 represent the odd number radio frames; In addition, during due to D=0.5,

so

also can be write as $t_0^{\mathrm{RA}}=\mathrm{\α}[\left(r\mathrm{mod}2\right)+1].$

√

determined PRACH is at which field, 0 represents first field, and 1 represents second field.

√

represent the original position of PRACH in certain field, i.e. from which sub-frame of uplink (owing to only having at most a UpPTS in a field, so the PRACH that form is preamble format 4 also can not need this amount), for example

expression is since the 1st sub-frame of uplink.

√ k _rAfor first available frequency domain resource piece of certain Physical Random Access Channel (RB, Resource Block), and

for up RB sum.

The mod 2 of √ α=(2D); Density index (or being called the access chance index in community) is the density that D is Physical Random Access Channel, pass through the signaling mobile phone by base station.

The version index that √ r is certain community, and r ∈ [0, R-1].

√

be the frequency domain map index (numbering of PRACH on frequency domain) of the form PRACH that is preamble format 0～3, and have $f_{\mathrm{LRA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{LRA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-1;$ Its implication is: version number is r, and time-domain position by the numbering of determined all PRACH, for version number is r, and time-domain position by

the quantity of determined all PRACH.

√

be the frequency domain map index (numbering of PRACH on frequency domain) of the form PRACH that is preamble format 4, and have

√ k ' _rAfor low frequency, first can be used for PRACH's

The PRACH that √ is preamble format 0～3 for form, L is the shared sub-frame of uplink quantity of this form PRACH,

quantity for sub-frame of uplink in field; For preamble format 4, L=1,

for the number (1 or 0) of UpPTS in field, i=0 is first field, and i=1 is the 2nd field, and

√ N _sPfor the quantity of downstream-to-upstream transfer point, it equals the quantity of UpPTS.

√ in addition,

√ is for preamble format 0～3, and R can, by issued the PRACH preparation kind of mobile phone by base station, determine according to the version number of preamble format and density combinations in PRACH preparation set; For preamble format 4,

under current system bandwidth, the quantity of the open ended PRACH of frequency domain; Or be

or, by issued the PRACH preparation kind of mobile phone by base station, according to the version number of preamble format and density combinations in PRACH preparation set, determine.

√ is for preamble format 0～3, and r can directly obtain by the PRACH preparation kind of being issued mobile phone by base station; For preamble format 4, or directly obtain r ∈ [0, R-1] by the PRACH preparation kind of being issued mobile phone by base station.

Embodiment six

The density of supposing PRACH is D (D can get 0.5,1,2,3,4,5,6 or 10PRACH/10ms); Version number is R; Be numbered

the index of certain community available PRACH in a random access period be d (can be described as PRACH index or density index in community,

); Version number is r (r ∈ [0, R-1]); In the 10ms radio frames, the number of downstream-to-upstream transfer point is N _sP; Certain form PRACH quantity that in field, time domain is held is

The PRACH numbering: first increase progressively the density index during numbering, then increment version,

wherein

r=0,1 ..., R-1.

● the time domain mapping

the radio frames mapping

when D=0.5PRACH/10ms

, for the PRACH of even number is mapped on the radio frames that is numbered even number, the PRACH that is numbered odd number is mapped on the radio frames that is numbered odd number (or r);

when D>0.5PRACH/10ms

All PRACH are mapped on each radio frames.

the field mapping

If the PRACH that will be mapped on this radio frames numbers according to it

ascending renumbeing, obtain q is the quantity that is mapped to the PRACH on this radio frames.The algorithm renumberd can be the mod 2 of α=(2D) wherein.

Order

n wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames,

and represent respectively the quantity of the PRACH of certain form that first field and second field hold on time domain.

Will for the PRACH of even number is mapped to first field, be second field that be mapped to of odd number;

the subframe mapping

for preamble format 4,

The all PRACH that are assigned on this field are mapped on the UpPTS of this field;

for preamble format 0～3,

By number ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from back to front, circularly, and on time domain, two adjacent PRACH are spaced apart 0.

● the frequency domain mapping

for preamble format 0～3

Time-domain position and the identical Physical Random Access Channel of the r of version number are shone upon to centre from both sides in can be used for sending the frequency resource of Physical Random Access Channel.

Suppose that time-domain position is identical, and the Physical Random Access Channel that version number is r has W, numbering is respectively w=0,1,2, ..., W-1, mapping method is that w is shining upon to high frequency from low frequency in can be used for sending the frequency resource of Physical Random Access Channel by w is ascending of even number, for shining upon to low frequency from high frequency in can be used for sending the frequency resource of Physical Random Access Channel by w is ascending of odd number, and a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number.

for preamble format 4

The r of version number is identical, be mapped to Physical Random Access Channel on certain UpPTS and shone upon from the low frequency to the high frequency or from the high frequency to the low frequency in can be used for sending the frequency resource of Physical Random Access Channel, and adjacent two UpPTS adopt different mapping orders.A Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number.Specifically

the situation that two UpPTS are arranged for a radio frames,

First UpPTS inherence can be used for sending in the frequency resource of Physical Random Access Channel to be shone upon to high frequency from low frequency, and second UpPTS inherence can be used for sending in the frequency resource of Physical Random Access Channel to be shone upon to low frequency from high frequency;

the situation that a UpPTS is arranged for a radio frames,

In the uplink pilot time slot of all radio frames, in available band, from low frequency, to high frequency, shine upon;

Above-mentioned mapping principle can be used following equation expression:

Time domain mapping formula:

$M_{\mathrm{ind}}^{\mathrm{RA}}=N_{\mathrm{ind}}^{\′\mathrm{RA}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

$t_0^{\mathrm{RA}}=\mathrm{\α}[\left(N_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}2\right)+1]$

$t_1^{\mathrm{RA}}=M_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}{N}_{\mathrm{SP}}$

Frequency domain mapping formula:

for preamble format 0～3

for preamble format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Wherein

√

determined PRACH is in which radio frames, 0 represents each radio frames, and 1 represents the even number radio frames, and 2 represent the odd number radio frames; In addition, during due to D=0.5, so also can be write as $t_0^{\mathrm{RA}}=\mathrm{\α}[\left(r\mathrm{mod}2\right)+1].$

√

determined PRACH is at which field, 0 represents first field, and 1 represents second field.

√

represent the original position of PRACH in certain field, i.e. from which sub-frame of uplink (owing to only having at most a UpPTS in a field, so the PRACH that form is preamble format 4 also can not need this amount), for example

expression is since the 1st sub-frame of uplink.

√ k _rAfor first available frequency domain resource piece of certain Physical Random Access Channel (RB, Resource Block), and

for up RB sum.

The mod 2 of √ α=(2D); Density index (or being called the access chance index in community) is

the density that D is Physical Random Access Channel, pass through the signaling mobile phone by base station.

The version index that √ r is certain community, and r ∈ [0, R-1]

√

be the frequency domain map index (numbering of PRACH on frequency domain) of certain form PRACH, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-1;$ Its implication is: version index is r, and time-domain position by

the numbering of determined all PRACH, k ' _rAfor low frequency, first can be used for PRACH's

for version index is r, and time-domain position by the quantity of determined all PRACH.

√

equal 0 or 1, so

be equivalent to

be equivalent to

The PRACH that √ is preamble format 0～3 for form, L is the shared sub-frame of uplink quantity of this form PRACH,

quantity for sub-frame of uplink in field; For preamble format 4, L=1,

for the number (1 or 0) of UpPTS in field, i=0 is first field, and i=1 is the 2nd field, and

√ N _sPfor the quantity of downstream-to-upstream transfer point, it equals the quantity of UpPTS.

√ in addition,

√ is for preamble format 0～3, and R can, by issued the PRACH preparation kind of mobile phone by base station, determine according to the version number of preamble format and density combinations in PRACH preparation set; For preamble format 4,

under current system bandwidth, the quantity of the open ended PRACH of frequency domain; Or be

or, by issued the PRACH preparation kind of mobile phone by base station, according to the version number of preamble format and density combinations in PRACH preparation set, determine.

√ is for preamble format 0～3, and r can directly obtain by the PRACH preparation kind of being issued mobile phone by base station.For preamble format 4,

or directly obtain by the PRACH preparation kind of being issued mobile phone by base station.r∈[0，R-1]

√ illustrates the mapping result of the present embodiment

If √ is R=1, D=4, the form of PRACH is preamble format 4, D: U=1: 3,

respectively corresponding (0,0), (0,1), (0,2), (0,3).

corresponding version number is 0, is mapped to two PRACH of UpPTS in first field, and corresponding relation can be arbitrarily, such as can distinguish corresponding (0,0), (0,2) or (0,2), (0,0).

corresponding version number is 0, is mapped to two PRACH of UpPTS in second field, and corresponding relation can be arbitrarily, such as

can distinguish corresponding (0,1), (0,3) or (0,3), (0,1).k′ _RA＝0。The time, frequently the position mapping result is as shown in figure 11.

If √ is R=1, D=3, the form of PRACH is preamble format 4, D: U=8: 2 (downstream-to-upstream transfer point, i.e. N _sP=1),

respectively corresponding (0,0), (0,1), (0,2). these three PRACH that corresponding version number is 0, and corresponding relation can be arbitrarily, such as

can distinguish corresponding (0,0), (0,1), (0,2), also can distinguish corresponding (0,0), (0,2), (0,1).k′ _RA＝0。The time, frequently the position mapping result is as shown in figure 13.

Embodiment seven

The density of supposing PRACH is D (D can get 0.5,1,2,3,4,5,6 or 10PRACH/10ms); Version number is R; Be numbered

the index of certain community available PRACH in a random access period be d (can be described as PRACH index or density index in community,

); Version number is r (r ∈ [0, R-1]); In the 10ms radio frames, the number of downstream-to-upstream transfer point is N _sP; Certain form PRACH quantity that in field, time domain is held is

● the PRACH numbering: first increase progressively the density index during numbering, then increment version,

wherein

r=0,1 ..., R-1.

● the time domain mapping

the radio frames mapping

when D=0.5PRACH/10ms

, for the PRACH of even number is mapped on the radio frames that is numbered even number, the PRACH that is numbered odd number is mapped on the radio frames that is numbered odd number (or r);

when D>0.5PRACH/10ms

All PRACH are mapped on each radio frames.

the field mapping

If the PRACH that will be mapped on this radio frames numbers according to it

ascending renumbeing, obtain

q is the quantity that is mapped to the PRACH on this radio frames.The algorithm renumberd can be

the mod 2 of α=(2D) wherein.

Order

n wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames,

and

represent respectively the quantity of the PRACH of certain form that first field and second field hold on time domain.

Will

for the PRACH of even number is mapped to first field, be second field that be mapped to of odd number;

the subframe mapping

for preamble format 4,

The all PRACH that are assigned on this field are mapped on the UpPTS of this field;

for preamble format 0～3,

By number ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from back to front, circularly, and on time domain, two adjacent PRACH are spaced apart 0.

● the frequency domain mapping

for preamble format 0～4

The r of version number is identical, be mapped to Physical Random Access Channel on a sub-frame of uplink or UpPTS and shone upon from the low frequency to the high frequency or from the high frequency to the low frequency in can be used for sending the frequency resource of Physical Random Access Channel, and the sub-frame of uplink on adjacent two fields or UpPTS adopt different mapping orders.A Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number.Specifically

the situation that two UpPTS are arranged for a radio frames,

Sub-frame of uplink in first field or UpPTS inherence can be used for sending in the frequency resource of Physical Random Access Channel to be shone upon to high frequency from low frequency, and the sub-frame of uplink in second field or UpPTS inherence can be used for sending in the frequency resource of Physical Random Access Channel to be shone upon to low frequency from high frequency;

the situation that a UpPTS is arranged for a radio frames,

In the sub-frame of uplink or UpPTS of all radio frames, in available band, from low frequency, to high frequency, shine upon;

Above-mentioned mapping principle can be used following equation expression:

Time domain mapping formula:

$M_{\mathrm{ind}}^{\mathrm{RA}}=N_{\mathrm{ind}}^{\′\mathrm{RA}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

$t_0^{\mathrm{RA}}=\mathrm{\α}[\left(N_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}2\right)+1]$

$t_1^{\mathrm{RA}}=M_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}{N}_{\mathrm{SP}}$

Frequency domain mapping formula:

for preamble format 0～4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Wherein

√

determined PRACH is in which radio frames, 0 represents each radio frames, and 1 represents the even number radio frames, and 2 represent the odd number radio frames; In addition, during due to D=0.5, so

also can be write as $t_0^{\mathrm{RA}}=\mathrm{\α}[\left(r\mathrm{mod}2\right)+1].$

√ determined PRACH is at which field, 0 represents first field, and 1 represents second field.

√

represent the original position of PRACH in certain field, i.e. from which sub-frame of uplink (owing to only having at most a UpPTS in a field, so the PRACH that form is preamble format 4 also can not need this amount), for example

expression is since the 1st sub-frame of uplink.

√ k _rAfor first available frequency domain resource piece of certain Physical Random Access Channel (RB, Resource Block), and

for up RB sum.

The mod 2 of √ α=(2D); Density index (or being called the access chance index in community) is

the density that D is Physical Random Access Channel, pass through the signaling mobile phone by base station.

The version index that √ r is certain community, and r ∈ [0, R-1]

√ be the frequency domain map index (numbering of PRACH on frequency domain) of certain form PRACH, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-1;$ Its implication is: version index is r, and time-domain position by the numbering of determined all PRACH, k ' _rAfor low frequency, first can be used for PRACH's

for version index is r, and time-domain position by the quantity of determined all PRACH.

√

equal 0 or 1, so

be equivalent to

be equivalent to

The PRACH that √ is preamble format 0～3 for form, L is the shared sub-frame of uplink quantity of this form PRACH,

quantity for sub-frame of uplink in field; For preamble format 4, L=1,

for the number (1 or 0) of UpPTS in field, i=0 is first field, and i=1 is the 2nd field, and

√ N _sPfor the quantity of downstream-to-upstream transfer point, it equals the quantity of UpPTS.

√ in addition,

√ is for preamble format 0～3, and R can, by issued the PRACH preparation kind of mobile phone by base station, determine according to the version number of preamble format and density combinations in PRACH preparation set; For preamble format 4,

under current system bandwidth, the quantity of the open ended PRACH of frequency domain; Or be

or, by issued the PRACH preparation kind of mobile phone by base station, according to the version number of preamble format and density combinations in PRACH preparation set, determine.

√ is for preamble format 0～3, and r can directly obtain by the PRACH preparation kind of being issued mobile phone by base station.For preamble format 4,

or directly obtain by the PRACH preparation kind of being issued mobile phone by base station.r∈[0，R-1]

Embodiment eight

The density of supposing PRACH is D (D can get 0.5,1,2,3,4,5,6 or 10PRACH/10ms); Version number is R; Be numbered

the index of certain community available PRACH in a random access period be d (can be described as PRACH index or density index in community,

); Version number is r (r ∈ [0, R-1]); In the 10ms radio frames, the number of downstream-to-upstream transfer point is N _sP; Certain form PRACH quantity that in field, time domain is held is

● the PRACH numbering: first increase progressively the density index during numbering, then increment version,

wherein

r=0,1 ..., R-1.

● the time domain mapping

the radio frames mapping

when D=0.5PRACH/10ms

, for the PRACH of even number is mapped on the radio frames that is numbered even number, the PRACH that is numbered odd number is mapped on the radio frames that is numbered odd number (or r);

when D>0.5PRACH/10ms

All PRACH are mapped on each radio frames.

the field mapping

If the PRACH that will be mapped on this radio frames numbers according to it

ascending renumbeing, obtain q is the quantity that is mapped to the PRACH on this radio frames.The algorithm renumberd can be

the mod 2 of α=(2D) wherein.

Order

n wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames, and

represent respectively the quantity of the PRACH of certain form that first field and second field hold on time domain.

Will

for the PRACH of even number is mapped to first field, be second field that be mapped to of odd number;

the subframe mapping

for preamble format 4,

The all PRACH that are assigned on this field are mapped on the UpPTS of this field;

for preamble format 0～3,

By number ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from back to front, circularly, and on time domain, two adjacent PRACH are spaced apart 0.

● the frequency domain mapping

for preamble format 0～4

The r of version number is identical, be mapped to Physical Random Access Channel on a sub-frame of uplink or UpPTS and shone upon from the low frequency to the high frequency or from the high frequency to the low frequency in can be used for sending the frequency resource of Physical Random Access Channel, and the sub-frame of uplink on adjacent two fields or UpPTS adopt different mapping orders.A Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number.Specifically

the situation that two UpPTS are arranged for a radio frames,

Sub-frame of uplink in first field or UpPTS inherence can be used for sending in the frequency resource of Physical Random Access Channel to be shone upon to high frequency from low frequency, and the sub-frame of uplink in second field or UpPTS inherence can be used for sending in the frequency resource of Physical Random Access Channel to be shone upon to low frequency from high frequency;

the situation that a UpPTS is arranged for a radio frames,

In the sub-frame of uplink or UpPTS of all radio frames, in available band, from both sides, to centre, shine upon

Above-mentioned mapping principle can be used following equation expression:

Time domain mapping formula:

$M_{\mathrm{ind}}^{\mathrm{RA}}=N_{\mathrm{ind}}^{\′\mathrm{RA}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

$t_0^{\mathrm{RA}}=\mathrm{\α}[\left(N_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}2\right)+1]$

$t_1^{\mathrm{RA}}=M_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}{N}_{\mathrm{SP}}$

Frequency domain mapping formula:

for preamble format 0～4

Work as N _sP=2 o'clock

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Work as N _sP=1 o'clock

Wherein

√

determined PRACH is in which radio frames, 0 represents each radio frames, and 1 represents the even number radio frames, and 2 represent the odd number radio frames; In addition, during due to D=0.5,

so

also can be write as $t_0^{\mathrm{RA}}=\mathrm{\α}[\left(r\mathrm{mod}2\right)+1].$

√

determined PRACH is at which field, 0 represents first field, and 1 represents second field.

√

represent the original position of PRACH in certain field, i.e. from which sub-frame of uplink (owing to only having at most a UpPTS in a field, so the PRACH that form is preamble format 4 also can not need this amount), for example

expression is since the 1st sub-frame of uplink.

√ k _rAfor first available frequency domain resource piece of certain Physical Random Access Channel (RB, Resource Block), and

for up RB sum.

The mod 2 of √ α=(2D); Density index (or being called the access chance index in community) is

the density that D is Physical Random Access Channel, pass through the signaling mobile phone by base station.

The version index that √ r is certain community, and r ∈ [0, R-1]

√

be the frequency domain map index (numbering of PRACH on frequency domain) of certain form PRACH, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-1;$ Its implication is: version index is r, and time-domain position by

the numbering of determined all PRACH, k ' _rAfor low frequency, first can be used for PRACH's

for version index is r, and time-domain position by

the quantity of determined all PRACH.

√

equal 0 or 1, so

be equivalent to

be equivalent to

The PRACH that √ is preamble format 0～3 for form, L is the shared sub-frame of uplink quantity of this form PRACH,

quantity for sub-frame of uplink in field; For preamble format 4, L=1,

for the number (1 or 0) of UpPTS in field, i=0 is first field, and i=1 is the 2nd field, and

√ N _sPfor the quantity of downstream-to-upstream transfer point, it equals the quantity of UpPTS.

√ in addition,

√ is for preamble format 0～3, and R can, by issued the PRACH preparation kind of mobile phone by base station, determine according to the version number of preamble format and density combinations in PRACH preparation set; For preamble format 4,

under current system bandwidth, the quantity of the open ended PRACH of frequency domain; Or be or, by issued the PRACH preparation kind of mobile phone by base station, according to the version number of preamble format and density combinations in PRACH preparation set, determine.

√ is for preamble format 0～3, and r can directly obtain by the PRACH preparation kind of being issued mobile phone by base station.For preamble format 4,

or directly obtain r ∈ [0, R-1] by the PRACH preparation kind of being issued mobile phone by base station.

Embodiment nine

The density of supposing PRACH is D (D can get 0.5,1,2,3,4,5,6 or 10PRACH/10ms); Version number is R; Be numbered

the index of certain community available PRACH in a random access period be d (can be described as PRACH index or density index in community,

); Version number is r (r ∈ [0, R-1]); In the 10ms radio frames, the number of downstream-to-upstream transfer point is N _sP; Certain form PRACH quantity that in field, time domain is held is

● the PRACH numbering: first increase progressively the density index during numbering, then increment version,

wherein

r=0,1 ..., R-1.

● the time domain mapping

the radio frames mapping

when D=0.5PRACH/10ms

, for the PRACH of even number is mapped on the radio frames that is numbered even number, the PRACH that is numbered odd number is mapped on the radio frames that is numbered odd number (or r);

when D>0.5PRACH/10ms

All PRACH are mapped on each radio frames.

the field mapping

If the PRACH that will be mapped on this radio frames numbers according to it

ascending renumbeing, obtain

q is the quantity that is mapped to the PRACH on this radio frames.The algorithm renumberd can be

the mod 2 of α=(2D) wherein.

Order

n wherein _sPbe the quantity of downstream-to-upstream transfer point in a radio frames,

and

represent respectively the quantity of the PRACH of certain form that first field and second field hold on time domain.

Will for the PRACH of even number is mapped to first field, be second field that be mapped to of odd number;

the subframe mapping

for preamble format 4,

The all PRACH that are assigned on this field are mapped on the UpPTS of this field;

for preamble format 0～3,

By number

ascending, the PRACH be assigned on this field is mapped in the sub-frame of uplink of this field from back to front, circularly, and on time domain, two adjacent PRACH are spaced apart 0.

● the frequency domain mapping

for preamble format 0～3

Time-domain position and the identical Physical Random Access Channel of the r of version number are shone upon to centre from both sides in can be used for sending the frequency resource of Physical Random Access Channel.

Suppose that time-domain position is identical, and the Physical Random Access Channel that version number is r has W, numbering is respectively w=0,1,2, ..., W-1, mapping method is that w is shining upon to high frequency from low frequency in can be used for sending the frequency resource of Physical Random Access Channel by w is ascending of even number, for shining upon to low frequency from high frequency in can be used for sending the frequency resource of Physical Random Access Channel by w is ascending of odd number, and a Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number;

for preamble format 4

The r of version number is identical, be mapped to a Physical Random Access Channel on UpPTS and shone upon from the low frequency to the high frequency or from the high frequency to the low frequency in can be used for sending the frequency resource of Physical Random Access Channel, and the UpPTS on adjacent two fields adopts different mapping orders.A Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels.Adopt identical mapping process for each r of version number.Specifically

the situation that two UpPTS are arranged for a radio frames,

UpPTS inherence in first field can be used for sending in the frequency resource of Physical Random Access Channel to be shone upon to high frequency from low frequency, and the UpPTS inherence in second field can be used for sending in the frequency resource of Physical Random Access Channel to be shone upon to low frequency from high frequency;

the situation that a UpPTS is arranged for a radio frames,

In the UpPTS of all radio frames, in available band, from both sides, to centre, shine upon

Above-mentioned mapping principle can be used following equation expression:

Time domain mapping formula:

$M_{\mathrm{ind}}^{\mathrm{RA}}=N_{\mathrm{ind}}^{\′\mathrm{RA}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

$t_0^{\mathrm{RA}}=\mathrm{\α}[\left(N_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}2\right)+1]$

$t_1^{\mathrm{RA}}=M_{\mathrm{ind}}^{\mathrm{RA}}\mathrm{mod}{N}_{\mathrm{SP}}$

Frequency domain mapping formula:

form for described Physical Random Access Channel is leading form 0～3

form for described Physical Random Access Channel is leading format 4

Work as N _sP=2 o'clock,

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Work as N _sP=1 o'clock,

Wherein

√

determined PRACH is in which radio frames, 0 represents each radio frames, and 1 represents the even number radio frames, and 2 represent the odd number radio frames; In addition, during due to D=0.5,

so

also can be write as $t_0^{\mathrm{RA}}=\mathrm{\α}[\left(r\mathrm{mod}2\right)+1].$

√

determined PRACH is at which field, 0 represents first field, and 1 represents second field.

√ represent the original position of PRACH in certain field, i.e. from which sub-frame of uplink (owing to only having at most a UpPTS in a field, so the PRACH that form is preamble format 4 also can not need this amount), for example expression is since the 1st sub-frame of uplink.

√ k _rAfor first available frequency domain resource piece of certain Physical Random Access Channel (RB, Resource Block), and

for up RB sum.

The mod 2 of √ α=(2D); Density index (or being called the access chance index in community) is

the density that D is Physical Random Access Channel, pass through the signaling mobile phone by base station.

The version index that √ r is certain community, and r ∈ [0, R-1]

√

be the frequency domain map index (numbering of PRACH on frequency domain) of certain form PRACH, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-1;$ Its implication is: version index is r, and time-domain position by the numbering of determined all PRACH, k ' _rAfor low frequency, first can be used for PRACH's

for version index is r, and time-domain position by

the quantity of determined all PRACH.

√

equal 0 or 1, so

be equivalent to

be equivalent to

The PRACH that √ is preamble format 0～3 for form, L is the shared sub-frame of uplink quantity of this form PRACH,

quantity for sub-frame of uplink in field; For preamble format 4, L=1,

for the number (1 or 0) of UpPTS in field, i=0 is first field, and i=1 is the 2nd field, and

√ N _sPfor the quantity of downstream-to-upstream transfer point, it equals the quantity of UpPTS.

√ in addition,

√ is for preamble format 0～3, and R can, by issued the PRACH preparation kind of mobile phone by base station, determine according to the version number of preamble format and density combinations in PRACH preparation set; For preamble format 4,

under current system bandwidth, the quantity of the open ended PRACH of frequency domain; Or be

or, by issued the PRACH preparation kind of mobile phone by base station, according to the version number of preamble format and density combinations in PRACH preparation set, determine.

√ is for preamble format 0～3, and r can directly obtain by the PRACH preparation kind of being issued mobile phone by base station.For preamble format 4, or directly obtain r ∈ [0, R-1] by the PRACH preparation kind of being issued mobile phone by base station.

From above description, can find out, the mapping method of the Physical Random Access Channel of the above embodiment of the present invention, adopt in mapping and considered density and version number's factor, process the PRACH problem such as skewness in time so overcome same base station, and then can make to need same base station processing PRACH to be uniformly distributed in time, can also reduce to greatest extent the presence of intercell interference of Equations of The Second Kind PRACH simultaneously.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (25)

1. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is

according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel

wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

All described Physical Random Access Channels are mapped on time domain to the described Physical Random Access Channel comprised being assigned on a 10ms radio frames in an orderly manner according to numbering and are mapped on its 5ms field, wherein,

Step a, work as N _sP=1 o'clock, all described Physical Random Access Channel be mapped in described radio frames is mapped in first field of described radio frames;

Step b, work as N _sP=2 o'clock, the described Physical Random Access Channel be mapped on described radio frames is divided into to two groups, be mapped to respectively on first and second field of described radio frames; Described N _sPbe the quantity of downstream-to-upstream transfer point in a described radio frames;

Step b specifically comprises:

Press

ascending or descending, compartment of terrain is mapped to described Physical Random Access Channel on described first and second field, wherein,

If by described Physical Random Access Channel according to it

ascending renumbeing, obtain

q is the quantity that is mapped to the described Physical Random Access Channel on described radio frames, and the mode renumberd is order

and

represent respectively the quantity of the described Physical Random Access Channel of a kind of form that described first field and second field hold on time domain,

Will

for the described Physical Random Access Channel of even number is mapped on described first field,

for the described Physical Random Access Channel of odd number is mapped on second field; Perhaps

Will

for the described Physical Random Access Channel of even number is mapped on described second field, for the described Physical Random Access Channel of odd number is mapped on described first field.

2. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is

according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel

wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

A described Physical Random Access Channel accounts for L on time domain _rAindividual sub-frame of uplink, be mapped to all described Physical Random Access Channels in an orderly manner on frequency domain and comprise and will be mapped to L according to numbering _rAdescribed Physical Random Access Channel on individual described sub-frame of uplink is shone upon one of by the following method on frequency domain:

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon to both sides from centre in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascending or descending described Physical Random Access Channel is shone upon to centre from both sides in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels;

By the r of version number _rAidentical described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

By the r of version number _rAidentical described Physical Random Access Channel shines upon to centre from both sides in available frequency resource, and a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

The Physical Random Access Channel that time-domain position is identical has W, according to

ascending or descending renumbeing as, w=0,1,2 ..., W-1, press ascending or descending described Physical Random Access Channel is specifically comprised from both sides to centre mapping in available frequency resource:

The Physical Random Access Channel that w is even number is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, for the Physical Random Access Channel of odd number is ascending or descending by w, in available frequency resource, from low frequency, to high frequency, shine upon, or w is even number Physical Random Access Channel is ascending or descending by w to shine upon to high frequency from low frequency in available frequency resource, for the Physical Random Access Channel of odd number is ascending or descending by w, in available frequency resource, from high frequency, to low frequency, shine upon; Or

The first half Physical Random Access Channel is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, the later half Physical Random Access Channel is ascending or descending by w to be shone upon to high frequency from low frequency in available frequency resource, or the first half Physical Random Access Channel is ascending or descending by w in available frequency resource, from low frequency, to high frequency, shines upon, the later half Physical Random Access Channel is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, wherein with

or

or

or physical Random Access Channel be the first half, take remaining Physical Random Access Channel as later half.

3. method according to claim 2, is characterized in that, the frequency domain mapping formula shone upon on frequency domain is:

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

wherein

Perhaps

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

wherein

Wherein

K _rAfor first available frequency domain resource piece of certain Physical Random Access Channel, and

for ascending resource piece sum;

α＝(2D _RA)mod2；

be the frequency domain map index of Physical Random Access Channel, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-$ Its implication is: version number is r _rA, and time-domain position by

the numbering of determined all Physical Random Access Channels, k ' _rAfor low frequency, first can be used for the position of the Resource Block of Physical Random Access Channel,

for version number is r _rA, and time-domain position by the quantity of determined all Physical Random Access Channels;

for the quantity of the uplink pilot time slot of the sub-frame of uplink of leading form 0～3 in field or leading format 4, i=0 is first field, and i=1 is the 2nd field; L _rAthe sub-frame of uplink number accounted for for the PRACH channel of leading form 0～3 form, for leading format 4, L _rA=1;

N _sPquantity for the downstream-to-upstream transfer point;

under current system bandwidth, the quantity of the open ended Physical Random Access Channel of frequency domain.

4. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is

according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

A described Physical Random Access Channel accounts for L on time domain _rAindividual sub-frame of uplink, be mapped to all described Physical Random Access Channels in an orderly manner on frequency domain and comprise and will be mapped to L according to numbering _rAdescribed Physical Random Access Channel on individual described sub-frame of uplink is shone upon one of by the following method on frequency domain:

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon to both sides from centre in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascending or descending described Physical Random Access Channel is shone upon to centre from both sides in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels;

By the r of version number _rAidentical described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

By the r of version number _rAidentical described Physical Random Access Channel shines upon to centre from both sides in available frequency resource, and a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

Version number is that r and the identical Physical Random Access Channel of time-domain position have W, and numbering is respectively w=0,1,2 ..., W-1, these time-domain positions are identical, and version number also identical W described Physical Random Access Channel in available frequency resource, from both sides to the centre mapping, specifically comprise:

The Physical Random Access Channel that w is even number is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, for the Physical Random Access Channel of odd number is ascending or descending by w, in available frequency resource, from low frequency, to high frequency, shine upon, or w is even number Physical Random Access Channel is ascending or descending by w to shine upon to high frequency from low frequency in available frequency resource, for the Physical Random Access Channel of odd number is ascending or descending by w, in available frequency resource, from high frequency, to low frequency, shine upon; Or

The first half Physical Random Access Channel is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, the later half Physical Random Access Channel is ascending or descending by w to be shone upon to high frequency from low frequency in available frequency resource, or the first half Physical Random Access Channel is ascending or descending by w in available frequency resource, from low frequency, to high frequency, shines upon, the later half Physical Random Access Channel is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, wherein with

or or

or physical Random Access Channel be the first half, take remaining Physical Random Access Channel as later half;

Wherein, the frequency domain mapping formula shone upon on frequency domain is:

Wherein

K _rAfor first available frequency domain resource piece of certain Physical Random Access Channel, and

for ascending resource piece sum;

α＝(2D _RA)mod2；

be the frequency domain map index of Physical Random Access Channel, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-$ Its implication is: version number is r _rA, and time-domain position by

the numbering of determined all Physical Random Access Channels, k ' _rAfor low frequency, first can be used for the position of the Resource Block of Physical Random Access Channel,

for version number is r _rA, and time-domain position by

the quantity of determined all Physical Random Access Channels;

for the quantity of the uplink pilot time slot of the sub-frame of uplink of leading form 0～3 in field or leading format 4, i=0 is first field, and i=1 is the 2nd field; L _rAthe sub-frame of uplink number accounted for for the PRACH channel of leading form 0～3 form, for leading format 4, L _rA=1;

N _sPquantity for the downstream-to-upstream transfer point;

under current system bandwidth, the quantity of the open ended Physical Random Access Channel of frequency domain.

5. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is

according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel

wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

A described Physical Random Access Channel accounts for L on time domain _rAindividual sub-frame of uplink, be mapped to all described Physical Random Access Channels in an orderly manner on frequency domain and comprise and will be mapped to L according to numbering _rAdescribed Physical Random Access Channel on individual described sub-frame of uplink is shone upon one of by the following method on frequency domain:

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon to both sides from centre in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascending or descending described Physical Random Access Channel is shone upon to centre from both sides in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels;

By the r of version number _rAidentical described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

By the r of version number _rAidentical described Physical Random Access Channel shines upon to centre from both sides in available frequency resource, and a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

Version number is that r and the identical Physical Random Access Channel of time-domain position have W, and numbering is respectively w=0,1,2 ..., W-1, these time-domain positions are identical, and version number also identical W described Physical Random Access Channel in available frequency resource, from both sides to the centre mapping, specifically comprise:

The Physical Random Access Channel that w is even number is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, for the Physical Random Access Channel of odd number is ascending or descending by w, in available frequency resource, from low frequency, to high frequency, shine upon, or w is even number Physical Random Access Channel is ascending or descending by w to shine upon to high frequency from low frequency in available frequency resource, for the Physical Random Access Channel of odd number is ascending or descending by w, in available frequency resource, from high frequency, to low frequency, shine upon; Or

The first half Physical Random Access Channel is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, the later half Physical Random Access Channel is ascending or descending by w to be shone upon to high frequency from low frequency in available frequency resource, or the first half Physical Random Access Channel is ascending or descending by w in available frequency resource, from low frequency, to high frequency, shines upon, the later half Physical Random Access Channel is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, wherein with

or

or

or

physical Random Access Channel be the first half, take remaining Physical Random Access Channel as later half;

Wherein, the frequency domain mapping formula shone upon on frequency domain is:

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

wherein

Perhaps

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

wherein

Wherein

K _rAfor first available frequency domain resource piece of certain Physical Random Access Channel, and

for ascending resource piece sum;

α＝(2D _RA)mod2；

be the frequency domain map index of Physical Random Access Channel, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-$ Its implication is: version number is r _rA, and time-domain position by

the numbering of determined all Physical Random Access Channels, k ' _rAfor low frequency, first can be used for the position of the Resource Block of Physical Random Access Channel,

for version number is r _rA, and time-domain position by the quantity of determined all Physical Random Access Channels;

for the quantity of the uplink pilot time slot of the sub-frame of uplink of leading form 0～3 in field or leading format 4, i=0 is first field, and i=1 is the 2nd field; L _rAthe sub-frame of uplink number accounted for for the PRACH channel of leading form 0～3 form, for leading format 4, L _rA=1;

N _sPquantity for the downstream-to-upstream transfer point;

under current system bandwidth, the quantity of the open ended Physical Random Access Channel of frequency domain.

6. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is

according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel

wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

By all described Physical Random Access Channels according to numbering be mapped in an orderly manner time domain and or frequency domain on comprise the described Physical Random Access Channel be mapped on a sub-frame of uplink or uplink pilot time slot shone upon by the following method on frequency domain:

By the r of version number _rAall described Physical Random Access Channel identical, that be mapped on sub-frame of uplink or uplink pilot time slot is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency,

Wherein, with above-mentioned steps, described Physical Random Access Channel is mapped to sub-frame of uplink or the uplink pilot time slot on adjacent two fields, adopt respectively different mapping orders, and a described Physical Random Access Channel accounts for 6 Resource Block, and the adjacent shared frequency band zero lap of two Physical Random Access Channels on frequency domain, for each r of version number _rAall adopt identical mapping process.

7. method according to claim 6, is characterized in that, by the r of version number _rAall described Physical Random Access Channel identical, that be mapped on a sub-frame of uplink or uplink pilot time slot is shone upon specifically and is comprised in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency:

In the even number radio frames, the sub-frame of uplink of first field or uplink pilot time slot shine upon to high frequency from the low frequency of available band; The sub-frame of uplink of second field or uplink pilot time slot shine upon to low frequency from the high frequency of available band; In the odd number radio frames, the sub-frame of uplink of first field or uplink pilot time slot shine upon to low frequency from the high frequency of available band; The sub-frame of uplink of second field or uplink pilot time slot shine upon to high frequency from the low frequency of available band; Or

In the odd number radio frames, the sub-frame of uplink of first field or uplink pilot time slot shine upon to high frequency from the low frequency of available band; The sub-frame of uplink of second field or uplink pilot time slot shine upon to low frequency from the high frequency of available band; In the even number radio frames, the sub-frame of uplink of first field or uplink pilot time slot shine upon to low frequency from the high frequency of available band; The sub-frame of uplink of second field or uplink pilot time slot shine upon to high frequency from the low frequency of available band; Or

According to the quantity of uplink pilot time slot in a radio frames, shone upon.

8. method according to claim 7, is characterized in that, according to the quantity of uplink pilot time slot in a radio frames, shone upon specifically and comprise:

The situation that two uplink pilot time slots are arranged for a radio frames,

In the inherent available band of sub-frame of uplink in first field or uplink pilot time slot, from low frequency, to high frequency, shine upon, in the inherent available band of sub-frame of uplink in second field or uplink pilot time slot, from high frequency, to low frequency, shine upon, each radio frames adopts identical method; Or

In the inherent available band of sub-frame of uplink in first field or uplink pilot time slot, from high frequency, to low frequency, shine upon, in the inherent available band of sub-frame of uplink in second field or uplink pilot time slot, from low frequency, to high frequency, shine upon, each radio frames adopts identical method;

The situation that a uplink pilot time slot is arranged for a radio frames

In the sub-frame of uplink or uplink pilot time slot of even number radio frames, in available band, from low frequency, to high frequency, shine upon, in the sub-frame of uplink or uplink pilot time slot of odd number radio frames, in available band, from high frequency, to low frequency, shine upon; Or

In the sub-frame of uplink or uplink pilot time slot of odd number radio frames, in available band, from low frequency, to high frequency, shine upon, in the sub-frame of uplink or uplink pilot time slot of even number radio frames, in available band, from high frequency, to low frequency, shine upon; Or

In the sub-frame of uplink or uplink pilot time slot of all radio frames, in available band, from low frequency, to high frequency, shine upon; Or

In the sub-frame of uplink or uplink pilot time slot of all radio frames, in available band, from low frequency, to high frequency, shine upon; Or

In the sub-frame of uplink or uplink pilot time slot of all radio frames, in available band, from both sides, to centre, shine upon.

9. according to the described method of any one in claim 6,7,8, it is characterized in that, the frequency domain mapping formula shone upon on frequency domain is:

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}(\left(\mathrm{SFN}\mathrm{mod}2\right)\·(2-N_{\mathrm{SP}})+t_{\mathrm{RA}}^1)\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}(\left(\mathrm{SFN}\mathrm{mod}2\right)+t_{\mathrm{RA}}^1)\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for described Physical Random Access Channel is leading form 0～4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for described Physical Random Access Channel is leading form 0～4

Work as N _sP=2 o'clock,

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Work as N _sP=1 o'clock,

Perhaps

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

Work as N _sP=2 o'clock,

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Work as N _sP=1 o'clock,

Wherein

K _rAfor first available frequency domain resource piece of certain Physical Random Access Channel, and

for ascending resource piece sum;

α＝(2D _RA)mod2；

be the frequency domain map index of Physical Random Access Channel, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-$ Its implication is: version number is r _rA, and time-domain position by the numbering of determined all Physical Random Access Channels, k ' _rAfor low frequency, first can be used for the position of the Resource Block of Physical Random Access Channel, for version number is r _rA, and time-domain position by

the quantity of determined all Physical Random Access Channels;

for the quantity of sub-frame of uplink in field (leading form 0～3) or uplink pilot time slot (leading format 4), i=0 is first field, and i=1 is the 2nd field; L _rAthe sub-frame of uplink number accounted for for the PRACH channel of certain leading form (leading form 0～3), for leading format 4, L _rA=1;

N _sPquantity for the downstream-to-upstream transfer point;

under current system bandwidth, the quantity of the open ended Physical Random Access Channel of frequency domain;

equal 0 or 1, so $t_{\mathrm{RA}}^1\mathrm{mod}2=0$ Be equivalent to $t_{\mathrm{RA}}^1=0;$ $t_{\mathrm{RA}}^1\mathrm{mod}2=1$ Be equivalent to $t_{\mathrm{RA}}^1=1;$

SFN is System Frame Number or is called radio frame number.

10. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is

according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

A described Physical Random Access Channel accounts for L on time domain _rAindividual sub-frame of uplink, be mapped to all described Physical Random Access Channels in an orderly manner on frequency domain and comprise and will be mapped to L according to numbering _rAdescribed Physical Random Access Channel on individual described sub-frame of uplink is shone upon one of by the following method on frequency domain:

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon to both sides from centre in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascending or descending described Physical Random Access Channel is shone upon to centre from both sides in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels;

By the r of version number _rAidentical described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

By the r of version number _rAidentical described Physical Random Access Channel shines upon to centre from both sides in available frequency resource, and a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

Version number is that r and the identical Physical Random Access Channel of time-domain position have W, and numbering is respectively w=0,1,2 ..., W-1, these time-domain positions are identical, and version number also identical W described Physical Random Access Channel in available frequency resource, from both sides to the centre mapping, specifically comprise:

The Physical Random Access Channel that w is even number is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, for the Physical Random Access Channel of odd number is ascending or descending by w, in available frequency resource, from low frequency, to high frequency, shine upon, or w is even number Physical Random Access Channel is ascending or descending by w to shine upon to high frequency from low frequency in available frequency resource, for the Physical Random Access Channel of odd number is ascending or descending by w, in available frequency resource, from high frequency, to low frequency, shine upon; Or

The first half Physical Random Access Channel is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, the later half Physical Random Access Channel is ascending or descending by w to be shone upon to high frequency from low frequency in available frequency resource, or the first half Physical Random Access Channel is ascending or descending by w in available frequency resource, from low frequency, to high frequency, shines upon, the later half Physical Random Access Channel is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, wherein with or

or

or

physical Random Access Channel be the first half, take remaining Physical Random Access Channel as later half;

Wherein, the frequency domain mapping formula shone upon on frequency domain is:

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}(\left(\mathrm{SFN}\mathrm{mod}2\right)\·(2-N_{\mathrm{SP}})+t_{\mathrm{RA}}^1)\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}(\left(\mathrm{SFN}\mathrm{mod}2\right)+t_{\mathrm{RA}}^1)\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for described Physical Random Access Channel is leading form 0～4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for described Physical Random Access Channel is leading form 0～4

Work as N _sP=2 o'clock,

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Work as N _sP=1 o'clock,

Perhaps

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

Work as N _sP=2 o'clock,

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Work as N _sP=1 o'clock,

Wherein

K _rAfor first available frequency domain resource piece of certain Physical Random Access Channel, and

for ascending resource piece sum;

α＝(2D _RA)mod2；

be the frequency domain map index of Physical Random Access Channel, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-$ Its implication is: version number is r _rA, and time-domain position by

the numbering of determined all Physical Random Access Channels, k ' _rAfor low frequency, first can be used for the position of the Resource Block of Physical Random Access Channel,

for version number is r _rA, and time-domain position by

the quantity of determined all Physical Random Access Channels;

for the quantity of sub-frame of uplink in field (leading form 0～3) or uplink pilot time slot (leading format 4), i=0 is first field, and i=1 is the 2nd field; L _rAthe sub-frame of uplink number accounted for for the PRACH channel of certain leading form (leading form 0～3), for leading format 4, L _rA=1;

N _sPquantity for the downstream-to-upstream transfer point;

under current system bandwidth, the quantity of the open ended Physical Random Access Channel of frequency domain;

equal 0 or 1, so $t_{\mathrm{RA}}^1\mathrm{mod}2=0$ Be equivalent to $t_{\mathrm{RA}}^1=0;$ $t_{\mathrm{RA}}^1\mathrm{mod}2=1$ Be equivalent to $t_{\mathrm{RA}}^1=1;$

SFN is System Frame Number or is called radio frame number.

11., according to the described method of any one in claim 1,2,6,7,8, it is characterized in that, also be included in while using mapping algorithm, obtain the described r of version number _rA, it specifically comprises:

Directly obtain the described r of version number by the described Physical Random Access Channel preparation kind of being sent by base station _rA, r _rA∈ [0, R-1].

12. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is

according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

A described Physical Random Access Channel accounts for L on time domain _rAindividual sub-frame of uplink, be mapped to all described Physical Random Access Channels in an orderly manner on frequency domain and comprise and will be mapped to L according to numbering _rAdescribed Physical Random Access Channel on individual described sub-frame of uplink is shone upon one of by the following method on frequency domain:

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon to both sides from centre in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascending or descending described Physical Random Access Channel is shone upon to centre from both sides in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels;

By the r of version number _rAidentical described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

By the r of version number _rAidentical described Physical Random Access Channel shines upon to centre from both sides in available frequency resource, and a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

Version number is that r and the identical Physical Random Access Channel of time-domain position have W, and numbering is respectively w=0,1,2 ..., W-1, these time-domain positions are identical, and version number also identical W described Physical Random Access Channel in available frequency resource, from both sides to the centre mapping, specifically comprise:

The Physical Random Access Channel that w is even number is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, for the Physical Random Access Channel of odd number is ascending or descending by w, in available frequency resource, from low frequency, to high frequency, shine upon, or w is even number Physical Random Access Channel is ascending or descending by w to shine upon to high frequency from low frequency in available frequency resource, for the Physical Random Access Channel of odd number is ascending or descending by w, in available frequency resource, from high frequency, to low frequency, shine upon; Or

The first half Physical Random Access Channel is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, the later half Physical Random Access Channel is ascending or descending by w to be shone upon to high frequency from low frequency in available frequency resource, or the first half Physical Random Access Channel is ascending or descending by w in available frequency resource, from low frequency, to high frequency, shines upon, the later half Physical Random Access Channel is ascending or descending by w to be shone upon to low frequency from high frequency in available frequency resource, wherein with

or

or

or physical Random Access Channel be the first half, take remaining Physical Random Access Channel as later half;

Described method also is included in while using mapping algorithm, obtains the described r of version number _rA, it specifically comprises:

Directly obtain the described r of version number by the described Physical Random Access Channel preparation kind of being sent by base station _rA, r _rA∈ [0, R-1].

13. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is

according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel

wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

D _rA>0.5 Physical Random Access Channel/10ms, be mapped to all described Physical Random Access Channels in an orderly manner on time domain and comprise that the employing following methods is mapped to all described Physical Random Access Channels on the 10ms radio frames according to numbering: all described Physical Random Access Channels are mapped on each described radio frames;

The time domain mapping formula that all described Physical Random Access Channels are mapped on the 10ms radio frames is:

$t_{\mathrm{RA}}^0=\mathrm{\α}(\left(n_{\mathrm{RA}}^{\mathrm{ind}}\mathrm{mod}2\right)+1)$

Wherein

mean Physical Random Access Channel is in which radio frames, and 0 represents each radio frames, and 1 represents the even number radio frames, and 2 represent the odd number radio frames, α=(2D _rA) mod2,

and

front conductivity type and the r of PRACH _rA, D _rAby base station, notified to mobile phone;

If will

and the above-mentioned expression formula of α substitution, also can write and do

in addition, due to D _rA>=1 o'clock, α=0; D _rA=0.5 o'clock, so also can be write as $t_{\mathrm{RA}}^0=\left(\left({2D}_{\mathrm{RA}}\right)\mathrm{mod}2\right)(1+r_{\mathrm{RA}}\mathrm{mod}2).$

14. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel

wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

D _rA=0.5 Physical Random Access Channel/10ms, be mapped to all described Physical Random Access Channels in an orderly manner on time domain and comprise that the employing following methods is mapped to all described Physical Random Access Channels on the 10ms radio frames according to numbering: press

ascending or descending, compartment of terrain is mapped to described Physical Random Access Channel on the described radio frames that is numbered even number and odd number, wherein,

The described Physical Random Access Channel that is numbered even number is mapped on the described radio frames that is numbered even number, and the described Physical Random Access Channel that is numbered odd number is mapped on the described radio frames that is numbered odd number; Perhaps

The described Physical Random Access Channel that is numbered even number is mapped on the described radio frames that is numbered odd number, and the described Physical Random Access Channel that is numbered odd number is mapped on the described radio frames that is numbered even number;

The time domain mapping formula that all described Physical Random Access Channels are mapped on the 10ms radio frames is:

$t_{\mathrm{RA}}^0=\mathrm{\α}(\left(n_{\mathrm{RA}}^{\mathrm{ind}}\mathrm{mod}2\right)+1)$

Wherein

mean Physical Random Access Channel is in which radio frames, and 0 represents each radio frames, and 1 represents the even number radio frames, and 2 represent the odd number radio frames, α=(2D _rA) mod2,

and

front conductivity type and the r of PRACH _rA, D _rAby base station, notified to mobile phone;

If will

and the above-mentioned expression formula of α substitution,

also can write and do

in addition, due to D _rA>=1 o'clock, α=0; D _rA=0.5 o'clock,

so also can be write as $t_{\mathrm{RA}}^0=\left(\left({2D}_{\mathrm{RA}}\right)\mathrm{mod}2\right)(1+r_{\mathrm{RA}}\mathrm{mod}2).$

15. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is

according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel

wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

All described Physical Random Access Channels are mapped on time domain to the described Physical Random Access Channel comprised being assigned on a 10ms radio frames in an orderly manner according to numbering and are mapped on its 5ms field, wherein,

Step a, work as N _sP1 o'clock, all described Physical Random Access Channel be mapped in described radio frames is mapped in first field of described radio frames;

Step b, work as N _sP=2 o'clock, the described Physical Random Access Channel be mapped on described radio frames is divided into to two groups, be mapped to respectively on first and second field of described radio frames; Described N _sPbe the quantity of downstream-to-upstream transfer point in a described radio frames;

The time domain mapping formula that the described Physical Random Access Channel be assigned on a 10ms radio frames is mapped on its 5ms field is:

$t_{\mathrm{RA}}^1=m_{\mathrm{RA}}^{\mathrm{ind}}\mathrm{mod}{N}_{\mathrm{SP}}$

Work as D _rA≤ 3 and leading form be 0 o'clock,

$m_{\mathrm{RA}}^{\mathrm{ind}}=n_{\mathrm{RA}}^{\′\mathrm{ind}}$

Otherwise

$m_{\mathrm{RA}}^{\mathrm{ind}}=n_{\mathrm{RA}}^{\′\mathrm{ind}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

Wherein

mean Physical Random Access Channel is at which field, and 0 represents first field, and 1 represents second field, the mod2 of α=(2D),

and

front conductivity type and the r of PRACH _rA, D _rAby base station, notified to mobile phone,

for the quantity of the uplink pilot time slot of the sub-frame of uplink of leading form 0～3 in field or leading format 4, i=0 is first field, and i=1 is the 2nd field;

If by α, the above-mentioned expression formula of substitution, also be expressed as

Work as D _rA≤ 3 and leading form be 0 o'clock,

Otherwise

16. method according to claim 15, is characterized in that, step b specifically comprises:

Press

ascending or descending, compartment of terrain is mapped to described Physical Random Access Channel on described first and second field, wherein,

If by described Physical Random Access Channel according to it

ascending renumbeing, obtain

q is the quantity that is mapped to the described Physical Random Access Channel on described radio frames, and the mode renumberd can be

when leading form is 0 and D _rA≤ 3 o'clock, order

otherwise, order

and

represent respectively the quantity of the described Physical Random Access Channel of a kind of form that described first field and second field hold on time domain; Perhaps

If by described Physical Random Access Channel according to it

ascending renumbeing, obtain

q is the quantity that is mapped to the described Physical Random Access Channel on described radio frames, and the mode renumberd can be when leading form is 0 and D _rA=2 o'clock, order

otherwise, order

n wherein _sPbe the quantity of downstream-to-upstream transfer point in a described radio frames,

and

represent respectively the quantity of the described Physical Random Access Channel of a kind of form that described first field and second field hold on time domain,

Will

for the described Physical Random Access Channel of even number is mapped on described first field, for the described Physical Random Access Channel of odd number is mapped on second field; Perhaps

Will

for the described Physical Random Access Channel of even number is mapped on described second field,

for the described Physical Random Access Channel of odd number is mapped on described first field.

17. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is

according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel

wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

All described Physical Random Access Channels are mapped on time domain to the described Physical Random Access Channel comprised being assigned on a 10ms radio frames in an orderly manner according to numbering and are mapped on its 5ms field, wherein,

Step a, work as N _sP=1 o'clock, all described Physical Random Access Channel be mapped in described radio frames is mapped in first field of described radio frames;

Step b, work as N _sP=2 o'clock, the described Physical Random Access Channel be mapped on described radio frames is divided into to two groups, be mapped to respectively on first and second field of described radio frames; Described N _sPbe the quantity of downstream-to-upstream transfer point in a described radio frames;

The time domain mapping formula that the described Physical Random Access Channel be assigned on a 10ms radio frames is mapped on its 5ms field is:

$t_{\mathrm{RA}}^1=m_{\mathrm{RA}}^{\mathrm{ind}}\mathrm{mod}{N}_{\mathrm{SP}}$

Work as D _rA=2 and leading form be 0 o'clock,

$m_{\mathrm{RA}}^{\mathrm{ind}}=n_{\mathrm{RA}}^{\′\mathrm{ind}}$

Otherwise

$m_{\mathrm{RA}}^{\mathrm{ind}}=n_{\mathrm{RA}}^{\′\mathrm{ind}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

Wherein

mean Physical Random Access Channel is at which field, and 0 represents first field, and 1 represents second field, the mod2 of α=(2D),

and

front conductivity type and the r of PRACH _rA, D _rAby base station, notified to mobile phone,

for the quantity of the uplink pilot time slot of the sub-frame of uplink of leading form 0～3 in field or leading format 4, i=0 is first field, and i=1 is the 2nd field;

If by α,

the above-mentioned expression formula of substitution,

also can be expressed as

Work as D _rA=2 and leading form be 0 o'clock,

Otherwise

18. method according to claim 17, is characterized in that, step b specifically comprises:

Press

ascending or descending, compartment of terrain is mapped to described Physical Random Access Channel on described first and second field, wherein,

If by described Physical Random Access Channel according to it

ascending renumbeing, obtain

q is the quantity that is mapped to the described Physical Random Access Channel on described radio frames, and the mode renumberd can be

when leading form is 0 and D _rA≤ 3 o'clock, order

otherwise, order

and

represent respectively the quantity of the described Physical Random Access Channel of a kind of form that described first field and second field hold on time domain; Perhaps

If by described Physical Random Access Channel according to it

ascending renumbeing, obtain

q is the quantity that is mapped to the described Physical Random Access Channel on described radio frames, and the mode renumberd can be

when leading form is 0 and D _rA=2 o'clock, order

otherwise, order

n wherein _sPbe the quantity of downstream-to-upstream transfer point in a described radio frames,

and represent respectively the quantity of the described Physical Random Access Channel of a kind of form that described first field and second field hold on time domain,

Will

for the described Physical Random Access Channel of even number is mapped on described first field, for the described Physical Random Access Channel of odd number is mapped on second field; Perhaps

Will for the described Physical Random Access Channel of even number is mapped on described second field,

for the described Physical Random Access Channel of odd number is mapped on described first field.

19. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is

according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel

wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

All described Physical Random Access Channels are mapped on time domain to the described Physical Random Access Channel comprised being assigned on a 10ms radio frames in an orderly manner according to numbering and are mapped on its 5ms field, wherein,

Step a, work as N _sP=1 o'clock, all described Physical Random Access Channel be mapped in described radio frames is mapped in first field of described radio frames;

Step b, work as N _sP=2 o'clock, the described Physical Random Access Channel be mapped on described radio frames is divided into to two groups, be mapped to respectively on first and second field of described radio frames; Described N _sPbe the quantity of downstream-to-upstream transfer point in a described radio frames;

The time domain mapping formula that the described Physical Random Access Channel be assigned on a 10ms radio frames is mapped on its 5ms field is:

$t_{\mathrm{RA}}^1=m_{\mathrm{RA}}^{\mathrm{ind}}\mathrm{mod}{N}_{\mathrm{SP}}$

$m_{\mathrm{RA}}^{\mathrm{ind}}=n_{\mathrm{RA}}^{\′\mathrm{ind}}\mathrm{mod}\underset{i=0}{\overset{N_{\mathrm{SP}}-1}{\mathrm{\Σ}}}{N}_{\mathrm{RA}}^{\mathrm{HF}}\left(i\right)$

Wherein

mean Physical Random Access Channel is at which field, and 0 represents first field, and 1 represents second field, the mod2 of α=(2D),

and

front conductivity type and the r of PRACH _rA, D _rAby base station, notified to mobile phone,

for the quantity of the uplink pilot time slot of the sub-frame of uplink of leading form 0～3 in field or leading format 4, i=0 is first field, and i=1 is the 2nd field;

If by α,

the above-mentioned expression formula of substitution,

also can be expressed as

20. method according to claim 19, is characterized in that, step b specifically comprises:

Press

ascending or descending, compartment of terrain is mapped to described Physical Random Access Channel on described first and second field, wherein,

If by described Physical Random Access Channel according to it

ascending renumbeing, obtain

q is the quantity that is mapped to the described Physical Random Access Channel on described radio frames, and the mode renumberd is

order

and

represent respectively the quantity of the described Physical Random Access Channel of a kind of form that described first field and second field hold on time domain,

Will

for the described Physical Random Access Channel of even number is mapped on described first field,

for the described Physical Random Access Channel of odd number is mapped on second field; Perhaps

Will

for the described Physical Random Access Channel of even number is mapped on described second field,

for the described Physical Random Access Channel of odd number is mapped on described first field.

21. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is

according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel

wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

The form of described Physical Random Access Channel is leading format 4, all described Physical Random Access Channels is mapped on time domain to the described Physical Random Access Channel comprised being assigned on a 5ms field in an orderly manner according to numbering and is mapped on its uplink pilot time slot;

The time domain mapping formula that the described Physical Random Access Channel be assigned on a 5ms field is mapped on its uplink pilot time slot is:

Wherein

mean leading form 0～be mapped on uplink pilot time slot when Physical Random Access Channel is mapped to which sub-frame of uplink or leading format 4 in field at 3 o'clock; The mod2 of α=(2D),

and

front conductivity type and the r of PRACH _rA, D _rAby base station, notified to mobile phone, for the quantity of the uplink pilot time slot of the sub-frame of uplink of leading form 0～3 in field or leading format 4, i=0 is first field, and i=1 is the 2nd field; In addition, for leading format 4, only has at most a uplink pilot time slot in a field, so now

22. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is

according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel

wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

The form of described Physical Random Access Channel is leading form 0～3, by all described Physical Random Access Channels according to numbering be mapped in an orderly manner on time domain comprise by be fitted on described Physical Random Access Channel on a 5ms field by

ascending, be mapped to from back to front, circularly in the sub-frame of uplink of described field, until the described Physical Random Access Channel be assigned on described field all shone upon, and on time domain adjacent two described Physical Random Access Channels uniformly-spaced, wherein,

Setting is spaced apart 0; Perhaps

If the sub-frame of uplink number that described Physical Random Access Channel accounts for is L _rA, the quantity that is mapped to the described Physical Random Access Channel on described field is P, the sub-frame of uplink number of current described field is

described being spaced apart is set

The time domain mapping formula that the described Physical Random Access Channel be assigned on a 5ms field is mapped on its uplink pilot time slot is:

Wherein

mean leading form 0～be mapped on uplink pilot time slot when Physical Random Access Channel is mapped to which sub-frame of uplink or leading format 4 in field at 3 o'clock; The mod2 of α=(2D),

and

front conductivity type and the r of PRACH _rA, D _rAby base station, notified to mobile phone,

for the quantity of the uplink pilot time slot of the sub-frame of uplink of leading form 0～3 in field or leading format 4, i=0 is first field, and i=1 is the 2nd field; In addition, for leading format 4, only has at most a uplink pilot time slot in a field, so now

23. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel

wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

A described Physical Random Access Channel accounts for L on time domain _rAindividual sub-frame of uplink, be mapped to all described Physical Random Access Channels in an orderly manner on frequency domain and comprise and will be mapped to L according to numbering _rAdescribed Physical Random Access Channel on individual described sub-frame of uplink is shone upon one of by the following method on frequency domain:

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon to both sides from centre in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press ascending or descending described Physical Random Access Channel is shone upon to centre from both sides in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels;

By the r of version number _rAidentical described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

By the r of version number _rAidentical described Physical Random Access Channel shines upon to centre from both sides in available frequency resource, and a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

The frequency domain mapping formula shone upon on frequency domain is:

Wherein

K _rAfor first available frequency domain resource piece of certain Physical Random Access Channel, and

for ascending resource piece sum;

α＝(2D _RA)mod2；

be the frequency domain map index of Physical Random Access Channel, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-$ Its implication is: version number is r _rA, and time-domain position by

the numbering of determined all Physical Random Access Channels,

for low frequency, first can be used for the position of the Resource Block of Physical Random Access Channel,

for version number is r _rA, and time-domain position by

the quantity of determined all Physical Random Access Channels;

for the quantity of the uplink pilot time slot of the sub-frame of uplink of leading form 0～3 in field or leading format 4, i=0 is first field, and i=1 is the 2nd field; L _rAthe sub-frame of uplink number accounted for for the PRACH channel of leading form 0～3 form, for leading format 4, L _rA=1;

N _sPquantity for the downstream-to-upstream transfer point;

under current system bandwidth, the quantity of the open ended Physical Random Access Channel of frequency domain.

24. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel

wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

A described Physical Random Access Channel accounts for L on time domain _rAindividual sub-frame of uplink, be mapped to all described Physical Random Access Channels in an orderly manner on frequency domain and comprise and will be mapped to L according to numbering _rAdescribed Physical Random Access Channel on individual described sub-frame of uplink is shone upon one of by the following method on frequency domain:

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon to both sides from centre in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascending or descending described Physical Random Access Channel is shone upon to centre from both sides in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels;

By the r of version number _rAidentical described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

By the r of version number _rAidentical described Physical Random Access Channel shines upon to centre from both sides in available frequency resource, and a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

The frequency domain mapping formula shone upon on frequency domain is:

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}(\left(\mathrm{SFN}\mathrm{mod}2\right)\·(2-N_{\mathrm{SP}})+t_{\mathrm{RA}}^1)\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}(\left(\mathrm{SFN}\mathrm{mod}2\right)+t_{\mathrm{RA}}^1)\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for described Physical Random Access Channel is leading form 0～4

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Perhaps

Form for described Physical Random Access Channel is leading form 0～4

Work as N _sP=2 o'clock,

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Work as N _sP=1 o'clock,

Perhaps

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

Work as N _sP=2 o'clock,

$k_{\mathrm{RA}}=\left\{\begin{array}{cc}{k}_{\mathrm{RA}}^{\′}+6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{if}{t}_{\mathrm{RA}}^1\mathrm{mod}2=0\\ N_{\mathrm{RB}}^{\mathrm{UL}}-k_{\mathrm{RA}}^{\′}-6-6f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2),& \mathrm{otherwise}\end{array}\right.$

Work as N _sP=1 o'clock,

Wherein

K _rAfor first available frequency domain resource piece of certain Physical Random Access Channel, and

for ascending resource piece sum;

α＝(2D _RA)mod2；

be the frequency domain map index of Physical Random Access Channel, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-$ Its implication is: version number is r _rA, and time-domain position by

the numbering of determined all Physical Random Access Channels, for low frequency, first can be used for the position of the Resource Block of Physical Random Access Channel,

for version number is r _rA, and time-domain position by the quantity of determined all Physical Random Access Channels;

for the quantity of sub-frame of uplink in field (leading form 0～3) or uplink pilot time slot (leading format 4), i=0 is first field, and i=1 is the 2nd field; L _rAthe sub-frame of uplink number accounted for for the PRACH channel of certain leading form (leading form 0～3), for leading format 4, L _rA=1;

N _sPquantity for the downstream-to-upstream transfer point;

under current system bandwidth, the quantity of the open ended Physical Random Access Channel of frequency domain;

equal 0 or 1, so $t_{\mathrm{RA}}^1\mathrm{mod}2=0$ Be equivalent to $t_{\mathrm{RA}}^1=0;$ $t_{\mathrm{RA}}^1\mathrm{mod}2=1$ Be equivalent to $t_{\mathrm{RA}}^1=1;$

SFN is System Frame Number or is called radio frame number.

25. the method for mapping physical random access channel, is characterized in that, comprises the following steps:

Obtain the density D of Physical Random Access Channel _rAwith version number R;

Build the density index according to described density, described density index is according to described version number build version number, described version number is r _rA=0,1 ..., R-1;

Use described density index and version number to build the numbering of described Physical Random Access Channel

wherein make described density index and version number sequentially increase progressively, first increase progressively d, then increase progressively r _rA; And

By all described Physical Random Access Channels according to the numbering be mapped in an orderly manner time domain and or frequency domain on;

A described Physical Random Access Channel accounts for L on time domain _rAindividual sub-frame of uplink, be mapped to all described Physical Random Access Channels in an orderly manner on frequency domain and comprise and will be mapped to L according to numbering _rAdescribed Physical Random Access Channel on individual described sub-frame of uplink is shone upon one of by the following method on frequency domain:

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascendingly or descending successively described Physical Random Access Channel is shone upon to both sides from centre in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two described Physical Random Access Channels;

Press

ascending or descending described Physical Random Access Channel is shone upon to centre from both sides in available frequency resource, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels;

By the r of version number _rAidentical described Physical Random Access Channel is shone upon in available frequency resource from the low frequency to the high frequency or from the high frequency to the low frequency, a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

By the r of version number _rAidentical described Physical Random Access Channel shines upon to centre from both sides in available frequency resource, and a described Physical Random Access Channel accounts for 6 Resource Block, and on frequency domain the adjacent shared frequency band zero lap of two Physical Random Access Channels; For each r of version number _rAall adopt identical mapping process;

The frequency domain mapping formula shone upon on frequency domain is:

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

wherein

Perhaps

Form for described Physical Random Access Channel is leading form 0～3

Form for described Physical Random Access Channel is leading format 4

wherein

Wherein

K _rAfor first available frequency domain resource piece of certain Physical Random Access Channel, and

for ascending resource piece sum;

α＝(2D _RA)mod2；

be the frequency domain map index of Physical Random Access Channel, and have $f_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)=\mathrm{0,1,2},...,N_{\mathrm{RA}}^r(t_{\mathrm{RA}}^0,t_{\mathrm{RA}}^1,t_{\mathrm{RA}}^2)-$ Its implication is: version number is r _rA, and time-domain position by

the numbering of determined all Physical Random Access Channels, k ' _rAfor low frequency, first can be used for the position of the Resource Block of Physical Random Access Channel,

for version number is r _rA, and time-domain position by

the quantity of determined all Physical Random Access Channels;

for the quantity of the uplink pilot time slot of the sub-frame of uplink of leading form 0～3 in field or leading format 4, i=0 is first field, and i=1 is the 2nd field; L _rAthe sub-frame of uplink number accounted for for the PRACH channel of leading form 0～3 form, for leading format 4, L _rA=1;

N _sPquantity for the downstream-to-upstream transfer point;

under current system bandwidth, the quantity of the open ended Physical Random Access Channel of frequency domain.