CN1317890A - Method and device for obtaining and maintaining system frame number and linking between frame numbers - Google Patents
Method and device for obtaining and maintaining system frame number and linking between frame numbers Download PDFInfo
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- CN1317890A CN1317890A CN01116100A CN01116100A CN1317890A CN 1317890 A CN1317890 A CN 1317890A CN 01116100 A CN01116100 A CN 01116100A CN 01116100 A CN01116100 A CN 01116100A CN 1317890 A CN1317890 A CN 1317890A
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Abstract
A method for obtaining and maintaining system frame number and linking frame number of WCDMA user includes creating an absolute time standard, searching the frame timing of each small zone, demodulating broadcast channel to obtain system frame number, latching absolute time standard in the head of the first frame in continuous frames obtaining the system frame number and offset of absolute time standard of each small zone, regulating frame numbers, recording them in the zone information table, and regularly obtaining the frame timing of each small zone to updata said information table.
Description
The present invention relates to catch in a kind of wireless system the method for frame number, specifically the user equipment side acquiring and maintaining System Frame Number of WCDMA and the method for Connection Frame Number.
The mobile communication technology in the present age has experienced three generations's development at present, a lot of communication enterprises of the world today are all in the research and development of being devoted to 3G (Third Generation) Moblie, WCDMA is one of main standard of 3G (Third Generation) Moblie, and it is effectively avoiding having bigger advantage aspect IPR and the expanding system capacity.The physical channel of WCDMA is divided into three layers in time: superframe, radio frames and time slot.Wherein the superframe frame length is 720ms, comprises 72 radio frames, and there is the System Frame Number definition on its border, and a frame system frame number of superframe is to 72 delivery values 0, and the System Frame Number of tail frame is to 72 delivery values 71.Radio frames is 10ms, is the elementary cell of the physical channel of WCDMA, and every radio frames comprises 38400 chips.Other is introduced synchronously for the maintenance frame higher level in the WCDMA Access Network for system frame number SFN and Connection Frame Number CFN.The span of the system frame number SFN of any one sub-district is from 0 to 4095, and every frame system frame number SFN adds 1, and when system frame number SFN is after 4095, following frame system frame number SFN becomes 0, goes round and begins again like this.Because between WCDMA sub-district and the sub-district is asynchronous system, so the frame of each sub-district regularly is not quite similar; Each sub-district is all regularly located system frame number SFN at the frame of this sub-district and is changed like this.Connection Frame Number CFN is meant in the once connection business, the frame number of DPCH (DPCH), and it is from certain initial value, every frame Connection Frame Number CFN adds 1, and when Connection Frame Number CFN is after 255, following frame Connection Frame Number CFN becomes 0, go round and begin again like this, finish up to current professional the connection.The each professional DPCH and the frame of sub-district regularly have skew, and it is often regularly constantly inconsistent with the sub-district frame that system frame number SFN changes that the variation of Connection Frame Number CFN frame number occurs in the DPCH frame timing moment.The initial value of once professional Connection Frame Number CFN is the monotropic function of the system frame number SFN of this moment, so the most basic problem is the acquisition and the maintenance of system frame number SFN by the unique decision of Cell System Frame Number SFN of the 1st frame DPCH zero hour of business.
In Access Network, no matter be base station (Node-B) side or subscriber equipment (UE) side, no matter be from the physical layer to the protocol layer, the demodulation of traffic frame all depends on the accurately synchronous of Connection Frame Number CFN, and the synchronous essence of Connection Frame Number CFN depends on the synchronous of system frame number SFN; Add, be offset (system frame number SFN-Connection Frame Number CFN) between the System Frame Number (system frame number SFN) that physical layer must provide the System Frame Number between the sub-district to be offset (system frame number SFN-system frame number SFN) and sub-district Connection Frame Number (Connection Frame Number CFN) and neighbor cell; So synchronization acquistion and the maintenance of system frame number SFN, Connection Frame Number CFN are absolutely necessary.
The system frame number SFN information of sub-district is broadcasted in the sub-district by broadcast channel, particularly, broadcast channel is that 20ms sends information with Transmission Time Interval (TTI), each TTI starts from the even frame of sub-district, in even frame, there are 11 bits to be used for representing current Cell System Frame Number, it is 0 to 2047 that the demonstration of 11 table of bits is enclosed, and real Cell System Frame Number SFN is the twice of this number.Strange frame in the TTI of each broadcast channel correspondence does not then comprise system frame number SFN information.
Catch and to obtain by separating of broadcast channel transferred in the system frame number SFN of UE side.A kind of existing method is, directly separates the system frame number SFN data of broadcast channel, extrapolates present system frame number SFN then what are.It at first searches for single frame regularly by Cell searching, and the demodulation broadcast channel obtains System Frame Number then, specifically will pass through the step of despreading, demodulation, channel decoding, check (CRC) and protocol layer storehouse.Usually will pass through a plurality of links such as despreading, channel decoding and protocol layer storehouse owing to will separate the data of broadcast channel, time-delay is not a definite value probably, so the possibility that the system frame number SFN of extrapolating is made mistakes is bigger.System frame number SFN needs every frame regularly to locate just to do and adds 1 maintenance subsequently.When the difference of comparison system frame number SFN between the several sub-districts of needs, then need to solve respectively the system frame number SFN information of the broadcast channel of each sub-district, converse current system frame number SFN then, need safeguard the system frame number SFN counter of a plurality of sub-districts so simultaneously, yet the precision of the system frame number SFN difference that obtains like this can only reach 1 frame, can not satisfy protocol requirement.
The purpose of this invention is to provide the user side acquiring and maintaining System Frame Number of a kind of WCDMA and the method and apparatus of Connection Frame Number, it can overcome the demodulation broadcast channel and obtain the reckoning System Frame Number that the time-delay in the System Frame Number process causes and make mistakes, make the state before the following period of time of demodulating process still maintains demodulation, extrapolate the preceding status system frame number of demodulation; Simultaneously in the System Frame Number information that does not solve each CBCH respectively, need not safeguard under the situation of a plurality of sub-districts counter, compare the difference of several Cell System Frame Number intuitively with settling at one go; Can reduce simultaneously the error of frame number under the time varying channel, make it much smaller than a frame.
For achieving the above object, solution of the present invention is: the user side acquiring and maintaining System Frame Number of a kind of WCDMA of the present invention and the method for Connection Frame Number, and it comprises:
Set up an absolute time standard;
Search for the frame timing of each sub-district, the demodulation broadcast channel obtains System Frame Number, first frame frame head at continuous some frames latchs the absolute time standard, obtain the System Frame Number of sub-district and the deviant of absolute time standard, be recorded in the cell information form of building up, wherein when detecting frame and regularly crossed over the border of absolute time standard, carry out the frame number adjustment, and then be recorded in the described cell information form of building up, and regularly obtain the frame timing of each sub-district, constantly refresh the cell information form;
Obtain the System Frame Number initial value according to latching the absolute time standard, the imbedding system frame number counter also safeguards, inserts Connection Frame Number counter initial value after the time and safeguards at the frame back constant offset that regularly arrives.
The present invention can also be after the frame timing that constantly obtains each sub-district, a system-frame timer is set, follow the tracks of the frame timing of current area by pilot channel, the length variations of the every frame of system-frame timing of feasible output is very little, and when frame regularly goes out, latch the absolute time standard, when this lower curtate that latchs the lower curtate of absolute time standard and cell information form appears at 0 and 39399 both sides, compensate adjustment, obtain the System Frame Number initial value.
The present invention can also comprise such step: take out the System Frame Number of different districts and the deviant of absolute time standard from the cell information table, comprise the skew of frame level offset and chip-level, be offset according to the System Frame Number that agreement obtains between the sub-district by computing unit.
The present invention can also comprise: the set time after system-frame arrives synchronously, latch the absolute time standard, that reads the sub-district in the cell information table comprises frame level offset and chip-level skew, is obtained the skew between the System Frame Number of sub-district Connection Frame Number and neighbor cell according to agreement by computing unit.
The present invention also provides the user side acquiring and maintaining System Frame Number of a kind of WCDMA and the device of Connection Frame Number, and it comprises:
An absolute time standard time clock device offers following apparatus absolute time standard;
A cell search module, the frame timing of searching for each sub-district;
A demodulation broadcast channel obtains the demodulator of System Frame Number, and contain a latch, first frame frame head at continuous some frames latchs the absolute time standard, obtain the System Frame Number of sub-district and the deviant of absolute time standard, and detect frame and regularly whether cross over the border of absolute time standard, then carry out the frame number adjustment in this way;
A cell information form, the deviant of above-mentioned System Frame Number of adjusting that obtains the sub-district and absolute time standard is recorded in the cell information form of building up, and the frame that regularly obtains each sub-district by above-mentioned cell search module regularly, constantly refreshes the cell information form;
A System Frame Number and a Connection Frame Number counter, obtain the System Frame Number initial value according to latching the absolute time standard, the imbedding system frame number counter also safeguards, inserts Connection Frame Number counter initial value after the time and safeguards at the frame back constant offset that regularly arrives.
The device of this user side acquiring and maintaining System Frame Number and Connection Frame Number can also comprise a System Frame Number calculations of offset unit, from the cell information table, take out the System Frame Number of different districts and the deviant of absolute time standard, comprise the skew of frame level offset and chip-level, be offset according to the System Frame Number that agreement obtains between the sub-district by computing unit.
It can also comprise the calculations of offset unit between the System Frame Number of a sub-district Connection Frame Number and neighbor cell, set time after system-frame arrives synchronously, latch the absolute time standard, that reads the sub-district in the cell information table comprises frame level offset and chip-level skew, is obtained the skew between the System Frame Number of sub-district Connection Frame Number and neighbor cell according to agreement by computing unit.
Owing to set up an absolute time standard in this method or the device, adopted a latch mechanism, first frame frame head at continuous some frames when the demodulation broadcast channel latchs the absolute time standard, removed the uncertainty of System Frame Number information delay, thereby obtain System Frame Number comparatively accurately, be not easy to make mistakes, obtain the skew of the system frame number SFN and the absolute time standard of this sub-district.
Owing to set up a cell information form in this method or the device, write down the skew of the system frame number SFN and the absolute time standard of each sub-district, and this form carries out periodic refresh by Cell searching, system frame number SFN deviation between all sub-districts can calculate by the content in the cell information form like this, and this has been avoided safeguarding simultaneously the needs of the system frame number SFN counter of a plurality of sub-districts.
Because whether this method or device regularly cross over the frame boundaries of absolute time standard by detecting frame, judge whether to carry out the frame number adjustment, make that the frame number error is far smaller than 1 frame under time varying channel.
In addition, from the cell information table, take out the System Frame Number of different districts and the frame level offset and the chip-level skew of absolute time standard, obtain the skew between the System Frame Number of System Frame Number skew, sub-district Connection Frame Number and neighbor cell between the sub-district by computing unit according to agreement, provide so again that System Frame Number between a kind of sub-district is offset, the easy method of measurement of the skew between the System Frame Number of sub-district Connection Frame Number and neighbor cell.
Below in conjunction with drawings and Examples the present invention is described in further detail.
Fig. 1 is the user side acquiring and maintaining System Frame Number of a kind of WCDMA of the present invention and the method block diagram of Connection Frame Number.
Fig. 2 is the structured flowchart of the device of the user side acquiring and maintaining System Frame Number of a kind of WCDMA and Connection Frame Number.
Fig. 3 is an absolute time standard logic circuit diagram of the present invention.
In the method block diagram of Fig. 1 preferred embodiment of the present invention, preferred embodiment of the present invention is divided into the following step: 1, absolute time standard
Set the time standard of a decision in user side, it comprises high portion and lower curtate.Lower curtate is finished the counting of chip-level, and from 0 to 38399, each chip is after the time, and counter adds 1, behind the meter full 38399, gets back to 0, goes round and begins again.High portion finishes other counting of frame level, and from 0 to 4095, whenever the lower curtate carry, high portion counter adds 1, behind the meter full 4095, gets back to 0.The absolute time standard is after the UE start, and just counting goes down always.The purposes of absolute time standard provides a unique time reference.
Fig. 3 is an absolute time standard logic circuit diagram of the present invention.Two modules are arranged: i.e. the high-order module of the low level module on top and bottom among the figure.Register 2 in the low level module is deposited the counting of lower curtate chip-level, after constantly adding 1 by adder 1, its data send into comparator 3 and 38999 relatively, when identical, be output as 1, produce carry and send into the input of high-order module adder 1, be connected into the set end zero clearing of register 2 simultaneously, and by reverser 4 be connected to register 2 with imitating mouthful, write register 2 after when comparator is output as 0, constantly adding 1.The reason of high-order module is identical.2, cell search module is finished chip rank frame synchronization and is caught
User side is caught synchronizing channel (SCH) and downlink pilot frequency channel (P-CPICH) by the Cell searching parts, can obtain the frame timing of each sub-district, this frame regularly is accurate to chip-level, each sub-district frame result regularly who obtains is with respect to the absolute time standard, the frame of the sub-district regularly value note of corresponding absolute time standard lower curtate is Tms, and the Tms of each sub-district can save as a form.
This cell search module is obtained frame realization regularly can be divided into for three steps substantially with reference to 3GPP T525.211/213/214 agreement:
(1) obtains slot timing by primary synchronization channel;
(2) obtain frame timing and the identification of cell scrambling group number by auxiliary synchronization channel;
(3) carry out the identification of scrambler signal by primary pilot channel.
Wherein the scrambler signal is corresponding to the sub-district, and the frame that has obtained corresponding scrambler signal has regularly just obtained corresponding to the frame of sub-district regularly.3, the demodulation broadcast channel obtains system frame number SFN, and obtains the deviation of Cell System Frame Number SFN with respect to the absolute time standard
After the frame timing acquisition of this sub-district arrives, just can separate broadcast channel; Because the even frame of broadcast channel just has the information of system frame number SFN,, see whether continuously so need judge parity frame, and need further separate continuously the system frame number SFN of even frame several times by CRC check separating timing.Usually behind the continuous solution n frame, just can determine system frame number SFN, the system frame number SFN value in the time of can conversing the 1st frame then is designated as system frame number SFN d.When the 1st frame frame head of so continuous n frame, latch the absolute time standard, high portion value is designated as OFFd, and lower curtate is designated as Tmd.The deviation of the system frame number SFN of this sub-district and absolute time standard just can obtain like this, but because below, also need to do some conversions and processing.Because mobile channel is time varying channel, the frame of sub-district regularly is dynamically to change, and the demodulation that refreshes with broadcast channel of Tms often is not to carry out simultaneously, and the Tms and the Tmd of possible this sub-district are incomplete same; Particularly when Tms, Tmd were near 38399, another was slightly less than 38399 situation less times greater than 0 then may to occur one, in order to prevent this situation that might bring a nearly frame error, need do special conversion and handle.Just can access the deviant of cell SFN and absolute time standard like this by SFNd, OFFd, Tms, Tmd, this deviant comprises two parts: the frame level offset
And Tms, in the record form of sub-district, carry out record.Conversion is treated to: if Tms＞Tmd and (Tms-Tmd)＞19200, then
=(system frame number SFN d-OFFd+1) is if mod is 4096 Tmd＞Tms and (Tmd-Tms)＞19200, then
=(system frame number SFN d2-OFFd-1) mod 4096 other
=(system frame number SFN d-OFFd) mod 4096 is when both sides 39399 and 0 of Tms, Tmd occurring (| Tms-Tmd|＞19200) as can be seen, done corresponding frame number compensation deals.
Deposit in the zone of respective cell in the information of searching sector table, the deviation of the system frame number SFN of such sub-district and absolute time standard has determined that with regard to unique it is embodied in fully
On Tms.
This demodulation broadcast channel obtains the realization of system frame number SFN can be with reference to TS25,211/212/213/214, by despreading, demodulation, channel decoding, check (CRC), carry out with layer stack.4, Cell searching is finished the maintenance that is offset between Cell System Frame Number SFN and the absolute time standard
Cell searching regularly obtains the frame timing of each sub-district, constantly refreshes the cell information form.Based on the reason identical, in the time of Cell searching refresh frame timing Tms, may need to adjust with the front
Whenever Cell searching provides new Tms, need and the Tms ' comparison of last time, Tms and Tms ' need adjustment when being distributed in 0,38399 both sides.
If Tms＞Tms ' and (Tms-Tms ')＞19200,
Then
If Tms '＞Tms and (Tms '-Tms)＞19200,
Then
Other situations then do not need to adjust.5, system-frame generation regularly
After current area was selected, the system-frame timer was followed the tracks of the frame timing of current area all the time, and this is to be undertaken by pilot channel; Because it is very little that system-frame regularly must satisfy the adjustable number of chips of every frame, so system-frame regularly often has difference with Tms, but difference and little, and system-frame is regularly always at the frame of following the tracks of current area regularly.The length variations of the every frame of system-frame timing of system-frame timer output is very little, limit a very little step-length with the difference of Tms, can only transfer 1/4 chip as 75 frames, it is provided with a lock unit, and such as a register is set, at a time the frame that captures of register regularly is Tms1, next captures Tms2 constantly, Tms2＞Tms1, then Tms2 turns down to the Tms1 direction, and vice versa; Next constantly compares with Tms2 during Tms3 more again.Therefore this method with regard to level and smooth frame regularly often with the difference of Tms.
Certainly, this step can omit, and the frame of current area timing Tms is exactly the frame timing of system like this.6, the initial value of current area system frame number SFN is inserted and is safeguarded
Regularly go out in system-frame, latch the high portion and the lower curtate of absolute time standard, be designated as OFFd and Tmd.Read this sub-district in the cell information form
And Tm, the initial value that can obtain system frame number SFN is as follows:
If Tmd＞Tms and (Tmd-Tms)＞19200,
System Frame Number then
If Tms＞Tmd and (Tms-Tmd)＞19200,
System Frame Number then
Other situation System Frame Numbers
This system frame number SFN initial value is exactly the system frame number SFN of that frame of regularly beginning of this system-frame.Whenever system-frame is regularly arrived, the system frame number SFN counter just adds 1 later on, be added to 4095 after, return 0.7, the initial value of Connection Frame Number CFN is inserted and is safeguarded
Connection Frame Number CFN initial value computing unit can calculate the Connection Frame Number CFN under the current system frame number SFN situation.DPCH regularly has a skew t0 with respect to the sub-district frame, so wait for t0 again after the time after frame regularly arrives, the Connection Frame Number CFN initial value that calculates is exactly the Connection Frame Number CFN of this DPCH.Later on the t0 after frame regularly arrives is after the time, and the system frame number SFN counter just adds 1, be added to 4095 after, return 0.8, system frame number SFN-system frame number SFN draws
From the cell information table, take out cell i
And Tms
iAnd sub-district j
And Tms
jSystem frame number SFN
i-system frame number SFN
j=OFF*38400+Tm
If Tms
i≤ Tms
j
Tm=Tms
j-Tms
i
Otherwise
Tm=Tms
j-Tms
i+ 38400
9, system frame number SFN-Connection Frame Number CFN's draws
Back t0 arrive synchronously after the time in system-frame, latch the absolute time standard, latched value is designated as OFFd and Tmd; And know the Connection Frame Number CFN of this moment; Read the i sub-district in the cell information table
, Tms
System frame number SFN-Connection Frame Number CFN=OFF*38400+Tm
As Tmd＞=Tms+1024
Tm=Tmd-Tms-1024
As Tms+1024＞Tmd＞=Tms+1024-38400
Tm=Tmd-Tms-1024+38400
As Tmd＜Tms+1024-38400
Tm=Tmd-Tms-1024+38400+38400
Main purpose of the present invention has been finished at preceding 6 ones, and 7,8 liang of steps are just finished additional function.
10, the demodulation broadcast channel is finished the verification that is offset between Cell System Frame Number SFN and the absolute time standard once more
If separate the broadcast channel of certain sub-district once more, just obtained verification
Chance, this can reduce such as for the first time separating the influence that system frame number SFN makes a mistake and brings from broadcast channel.If it is new
With Tmd and original
Satisfy with Tms
Then illustrate new
With original
Be contradiction, at this moment need to separate once more the broadcast channel of this sub-district, which is right with helping determine the end.If before the confirmation current area
Be wrong, then need to obtain again new system frame number SFN initial value, and safeguard; If other sub-districts
Wrong, then only need the simple cell information epiphase that upgrades to answer the sub-district
The territory gets final product.This step has improved the precision that is offset between Cell System Frame Number SFN and the absolute time standard, further perfect the present invention.
In order to finish 10 top steps, need be with lower member: absolute time standard counter, cell search module, system-frame timing generator, broadcast channel demodulator, Connection Frame Number CFN initial value computing unit, frame head latch, system frame number SFN and Connection Frame Number CFN counter, system frame number SFN-system frame number SFN computing unit, system frame number SFN-Connection Frame Number CFN computing unit and total control module.Other modules of total control module organizational controls are finished 10 top steps, and it comprises in the cell information form
Obtain, refresh, Tms refreshes, the verification that is offset between Cell System Frame Number SFN and the absolute time standard, the initial value of current area system frame number SFN is inserted and is safeguarded, the initial value of Connection Frame Number CFN is inserted and is safeguarded, drawing of system frame number SFN-system frame number SFN, system frame number SFN-Connection Frame Number CFN draws.
Fig. 2 is the structured flowchart of the device of the user side acquiring and maintaining System Frame Number of a kind of WCDMA and Connection Frame Number.Among the figure, an absolute time standard time clock device offers following apparatus absolute time standard;
A cell search module, the frame of searching for each sub-district regularly obtains Tms, it is sent into the demodulation broadcast channel to obtain the demodulator of System Frame Number, and contain a latch, first frame frame head at continuous some frames latchs the absolute time standard, obtain the System Frame Number of sub-district and the deviant of absolute time standard, and detect frame and regularly whether cross over the border of absolute time standard, then carry out the frame number adjustment in this way; The System Frame Number of adjusting that obtains the sub-district and the deviant of absolute time standard are recorded in the cell information form of building up, and the frame that regularly obtains each sub-district by above-mentioned cell search module regularly, constantly refreshes the cell information form;
A System Frame Number and a Connection Frame Number counter, obtain the System Frame Number initial value according to latching the absolute time standard, the imbedding system frame number counter also safeguards, inserts Connection Frame Number counter initial value after the time and safeguards at the frame back constant offset that regularly arrives.
The device of this user side acquiring and maintaining System Frame Number and Connection Frame Number can also comprise a System Frame Number calculations of offset unit, from the cell information table, take out the System Frame Number of different districts and the deviant of absolute time standard, comprise the skew of frame level offset and chip-level, be offset according to the System Frame Number that agreement obtains between the sub-district by computing unit.
It can also comprise the calculations of offset unit between the System Frame Number of a sub-district Connection Frame Number and neighbor cell, set time after system-frame arrives synchronously, latch the absolute time standard, that reads the sub-district in the cell information table comprises frame level offset and chip-level skew, is obtained the skew between the System Frame Number of sub-district Connection Frame Number and neighbor cell according to agreement by computing unit.
Claims (11)
1, the user side acquiring and maintaining System Frame Number of a kind of WCDMA and the method for Connection Frame Number, it comprises:
Set up an absolute time standard;
Search for the frame timing of each sub-district, the demodulation broadcast channel obtains System Frame Number, first frame frame head at continuous some frames latchs the absolute time standard, obtain the System Frame Number of sub-district and the deviant of absolute time standard, be recorded in the cell information form of building up, wherein, when detecting frame and regularly crossed over the border of absolute time standard, to carry out the frame number adjustment earlier, and then be recorded in the described cell information form of building up, and the frame that regularly obtains each sub-district regularly, constantly refreshes the cell information form;
Obtain the System Frame Number initial value according to latching the absolute time standard, the imbedding system frame number counter also safeguards, inserts Connection Frame Number counter initial value after the time and safeguards at the frame back constant offset that regularly arrives.
2, the user side acquiring and maintaining System Frame Number of WCDMA according to claim 1 and the method for Connection Frame Number is characterized in that: set up the absolute time standard, comprise and set up one high and lower curtate, lower curtate is finished the counting of chip-level, and from 0 to 38399, each chip is after the time, counter adds 1, behind the meter full 38399, gets back to 0, high portion finishes other counting of frame level, from 0 to 4095, whenever the lower curtate carry, high portion counter adds 1, behind the meter full 4095, get back to 0.
3, the user side acquiring and maintaining System Frame Number of WCDMA according to claim 1 and the method for Connection Frame Number is characterized in that: the frame timing by a cell search module is searched for each sub-district, constantly refresh the cell information form.
4, the user side acquiring and maintaining System Frame Number of WCDMA according to claim 1 and the method for Connection Frame Number is characterized in that: when the demodulation broadcast channel, carry out the verification of a CRC, and the system frame number SFN of continuous solution several times idol frame.
5, the user side acquiring and maintaining System Frame Number of WCDMA according to claim 1 and the method for Connection Frame Number, it is characterized in that: after the frame timing that constantly obtains each sub-district, a system-frame timer is set, follow the tracks of the frame timing of current area by pilot channel, the length variations of the every frame of system-frame timing of feasible output is very little, and when frame regularly goes out, latch the absolute time standard, when this lower curtate that latchs the lower curtate of absolute time standard and cell information form appears at 0 and 39399 both sides, compensate adjustment, obtain the System Frame Number initial value.
6, according to claim 1,2,3, the user side acquiring and maintaining System Frame Number of 4 or 5 described WCDMA and the method for Connection Frame Number, it is characterized in that it also comprises: from the cell information table, take out the System Frame Number of different districts and the deviant of absolute time standard, comprise the skew of frame level offset and chip-level, be offset according to the System Frame Number that agreement obtains between the sub-district by computing unit.
7, according to claim 1,2,3, the user side acquiring and maintaining System Frame Number of 4 or 5 described WCDMA and the method for Connection Frame Number, it is characterized in that it also comprises: the set time after system-frame arrives synchronously, latch the absolute time standard, that reads the sub-district in the cell information table comprises frame level offset and chip-level skew, is obtained the skew between the System Frame Number of sub-district Connection Frame Number and neighbor cell according to agreement by computing unit.
8, according to claim 1,2,3, the user side acquiring and maintaining System Frame Number of 4 or 5 described WCDMA and the method for Connection Frame Number, when it is characterized in that once more the demodulation broadcast channel, carry out a Cell System Frame Number with and the verification of absolute time standard.
9, the user side acquiring and maintaining System Frame Number of a kind of WCDMA and the device of Connection Frame Number, it comprises:
An absolute time standard time clock device offers following apparatus absolute time standard;
A cell search module, the frame timing of searching for each sub-district;
A demodulation broadcast channel obtains the demodulator of System Frame Number, and contain a latch, first frame frame head at continuous some frames latchs the absolute time standard, obtain the System Frame Number of sub-district and the deviant of absolute time standard, and detect frame and regularly whether cross over the border of absolute time standard, then carry out the frame number adjustment in this way;
A cell information form, the deviant of above-mentioned System Frame Number of adjusting that obtains the sub-district and absolute time standard is recorded in the cell information form of building up, and the frame that regularly obtains each sub-district by above-mentioned cell search module regularly, constantly refreshes the cell information form;
A System Frame Number and a Connection Frame Number counter, obtain the System Frame Number initial value according to latching the absolute time standard, the imbedding system frame number counter also safeguards, inserts Connection Frame Number counter initial value after the time and safeguards at the frame back constant offset that regularly arrives.
10, the user side acquiring and maintaining System Frame Number of WCDMA according to claim 9 and the device of Connection Frame Number, it is characterized in that: it also comprises a System Frame Number calculations of offset unit, from the cell information table, take out the System Frame Number of different districts and the deviant of absolute time standard, comprise the skew of frame level offset and chip-level, be offset according to the System Frame Number that agreement obtains between the sub-district by computing unit.
11, according to the user side acquiring and maintaining System Frame Number of claim 9 or 10 described WCDMA and the device of Connection Frame Number, it is characterized in that: it also comprises the calculations of offset unit between the System Frame Number of a sub-district Connection Frame Number and neighbor cell, set time after system-frame arrives synchronously, latch the absolute time standard, that reads the sub-district in the cell information table comprises frame level offset and chip-level skew, is obtained the skew between the System Frame Number of sub-district Connection Frame Number and neighbor cell according to agreement by computing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011161000A CN1150704C (en) | 2001-05-16 | 2001-05-16 | Method and device for obtaining and maintaining system frame number and linking between frame numbers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011161000A CN1150704C (en) | 2001-05-16 | 2001-05-16 | Method and device for obtaining and maintaining system frame number and linking between frame numbers |
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| Publication Number | Publication Date |
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| CN1317890A true CN1317890A (en) | 2001-10-17 |
| CN1150704C CN1150704C (en) | 2004-05-19 |
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|---|---|---|---|
| CNB011161000A Expired - Fee Related CN1150704C (en) | 2001-05-16 | 2001-05-16 | Method and device for obtaining and maintaining system frame number and linking between frame numbers |
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| CN (1) | CN1150704C (en) |
Cited By (14)
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| CN100372405C (en) * | 2003-04-29 | 2008-02-27 | 华为技术有限公司 | Power equalization implementing method for dedicated down channel and reference power calculating circuit |
| CN100385991C (en) * | 2004-04-16 | 2008-04-30 | 华为技术有限公司 | Control method for activating time deviation |
| CN100403825C (en) * | 2006-01-26 | 2008-07-16 | 华为技术有限公司 | Method for transmitting frame timing and frame number of general radio interface |
| CN100441042C (en) * | 2005-05-23 | 2008-12-03 | 中兴通讯股份有限公司 | Radio allocation activation time selecting method controlled by radio resource |
| CN100463569C (en) * | 2005-01-13 | 2009-02-18 | 三星电子株式会社 | Method for transmitting broadcast channel in a cellular wireless communication system |
| CN1983869B (en) * | 2005-12-15 | 2010-05-05 | 大唐移动通信设备有限公司 | Wireless access controller and method for timed adjusting transmission channel between base stations |
| CN101166315B (en) * | 2006-10-17 | 2010-09-08 | 大唐移动通信设备有限公司 | A method for making submitted signaling of base station radio link reconfiguration take effect |
| CN1921406B (en) * | 2005-08-22 | 2010-10-13 | 中兴通讯股份有限公司 | Computing method for connecting frame number displacement of activation time in empty-orifice synchronous configuration signal |
| CN101951300A (en) * | 2010-09-21 | 2011-01-19 | 国网电力科学研究院 | Method for realizing accurate time tick of Ethernet |
| CN1893387B (en) * | 2005-06-17 | 2011-06-22 | 阿尔卡特公司 | Encapsulation of e1-type frames under ethernet |
| WO2012055289A1 (en) * | 2010-10-25 | 2012-05-03 | 中兴通讯股份有限公司 | Method, base station and system for synchronizing frame numbers |
| CN102647764A (en) * | 2012-04-16 | 2012-08-22 | 华为技术有限公司 | Method and device of soft hand-off control |
| CN101507125B (en) * | 2006-08-29 | 2012-10-10 | 高通股份有限公司 | System frame number (SFN) evaluator |
| WO2015013863A1 (en) * | 2013-07-29 | 2015-02-05 | 华为技术有限公司 | Communication method and access equipment |
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2001
- 2001-05-16 CN CNB011161000A patent/CN1150704C/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372405C (en) * | 2003-04-29 | 2008-02-27 | 华为技术有限公司 | Power equalization implementing method for dedicated down channel and reference power calculating circuit |
| CN100385991C (en) * | 2004-04-16 | 2008-04-30 | 华为技术有限公司 | Control method for activating time deviation |
| CN100463569C (en) * | 2005-01-13 | 2009-02-18 | 三星电子株式会社 | Method for transmitting broadcast channel in a cellular wireless communication system |
| CN100441042C (en) * | 2005-05-23 | 2008-12-03 | 中兴通讯股份有限公司 | Radio allocation activation time selecting method controlled by radio resource |
| CN1893387B (en) * | 2005-06-17 | 2011-06-22 | 阿尔卡特公司 | Encapsulation of e1-type frames under ethernet |
| CN1921406B (en) * | 2005-08-22 | 2010-10-13 | 中兴通讯股份有限公司 | Computing method for connecting frame number displacement of activation time in empty-orifice synchronous configuration signal |
| CN1983869B (en) * | 2005-12-15 | 2010-05-05 | 大唐移动通信设备有限公司 | Wireless access controller and method for timed adjusting transmission channel between base stations |
| CN100403825C (en) * | 2006-01-26 | 2008-07-16 | 华为技术有限公司 | Method for transmitting frame timing and frame number of general radio interface |
| CN101507125B (en) * | 2006-08-29 | 2012-10-10 | 高通股份有限公司 | System frame number (SFN) evaluator |
| CN101166315B (en) * | 2006-10-17 | 2010-09-08 | 大唐移动通信设备有限公司 | A method for making submitted signaling of base station radio link reconfiguration take effect |
| CN101951300A (en) * | 2010-09-21 | 2011-01-19 | 国网电力科学研究院 | Method for realizing accurate time tick of Ethernet |
| CN101951300B (en) * | 2010-09-21 | 2014-09-10 | 国网电力科学研究院 | Method for realizing accurate time tick of Ethernet |
| WO2012055289A1 (en) * | 2010-10-25 | 2012-05-03 | 中兴通讯股份有限公司 | Method, base station and system for synchronizing frame numbers |
| CN102647764A (en) * | 2012-04-16 | 2012-08-22 | 华为技术有限公司 | Method and device of soft hand-off control |
| CN102647764B (en) * | 2012-04-16 | 2015-07-08 | 华为技术有限公司 | Method and device of soft hand-off control |
| WO2015013863A1 (en) * | 2013-07-29 | 2015-02-05 | 华为技术有限公司 | Communication method and access equipment |
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