CN1997218B - A method for reduction of the call delay of the WCDMA system - Google Patents
A method for reduction of the call delay of the WCDMA system Download PDFInfo
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- CN1997218B CN1997218B CN200610011125A CN200610011125A CN1997218B CN 1997218 B CN1997218 B CN 1997218B CN 200610011125 A CN200610011125 A CN 200610011125A CN 200610011125 A CN200610011125 A CN 200610011125A CN 1997218 B CN1997218 B CN 1997218B
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- uplink interference
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- indication channel
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Abstract
This invention discloses one method to reduce WCDMA system call time lag, which uses the dynamic parameters on calling time establishing to user terminal in down public common signal channel to read it to compute initial emission power by user terminal. This invention system can make user get dynamic parameters in establishing time to meet the 3G mobile communication partner long time progress pled to simply RNC function and to enhance NODE B function.
Description
Technical field
The present invention relates to Wideband Code Division Multiple Access (WCDMA) and insert the method that reduces the calling time-delay among (Wideband Code Division Multiple Access) system (hereinafter to be referred as WCDMA), particularly WCDMA.
Background technology
When user terminal (User Equipment is called for short UE) access WCDMA system, need carry out up open Loop Power control for the quality that guarantees its link, the formula of rated output is as follows:
Preamble_Initial_Power＝Primary?CPICH?TX?power-CPICH_RSCP+ULinterference+Constant?Value
Wherein, CPICH_RSCP represents the pilot channel received power that UE measures, PrimaryCPICH TX power represents the transmitting power of pilot channel, UL interference represents uplink interference, Constant Value represents the constant of network configuration, UE is by interception system block of information (SystemInformation Block, abbreviation SIB) obtains this Several Parameters, wherein emission power of pilot channel and constant are not time-varying parameters, the frequency that changes is very little, this paper is referred to as static parameter, and these two parameters are provided by SIB5/6.And uplink interference is dynamic change, and change frequency is than very fast, it is not only relevant with UE quantity, business that UE carries out in the sub-district, and it is also relevant with the variation of wireless environment, therefore can not utilize and be kept at the historical value among the UE and must read again, this paper is referred to as dynamic parameter, and this parameter is provided by SIB7.When uplink interference was bigger than normal, the access meeting of UE caused extra impact to system; When uplink interference is less than normal, can cause too much access exploration, increased and called out time-delay.
Determined the to eat dishes without rice or wine broadcasting of SIB7 of the tree of SIB and the scheduling mechanism of SIB is not continuous, experimental results show that beginning to intercept SIB from UE wants the time of 70～80ms at least to obtaining uplink interference, also is a WCDMA system calling long major reason of settling time.
Longer at call set-up time, more existing at present solutions, as:
Revise beep-page message 1, uplink interference is issued paged UE by beep-page message 1, paged like this UE can intercept SIB7 and directly make a call.Yet this method can't solve the situation that UE initiatively makes a call, and uplink interference is a common parameter in the sub-district simultaneously, and its adding is bigger to expense in each user's the beep-page message, and efficient is lower;
Revise Master Information Block (the Master Information Block among the SIB, be called for short MIB), increasing a bit indicates UE whether to need to read uplink interference among the SIB7, yet the every 80ms of MIB just repeats once in this scheme, when the uplink interference among the SIB7 changes, SIB7 still will intercept, and is not obvious to the improvement of calling out time-delay.
Summary of the invention
The object of the present invention is to provide a kind of method of the WCDMA of reducing system calling time-delay, make user terminal can obtain the dynamic parameter that influences call set-up time fast, reduce call set-up time.
To achieve these goals, the invention provides a kind of method of the WCDMA of reducing system calling time-delay, be multiplexed into by the dynamic parameter that will influence call set-up time and send to user terminal in the down public common, calculate Initial Trans after reading described dynamic parameter by described user terminal.
The above-mentioned method that reduces the time-delay of WCDMA system calling wherein, specifically comprises the steps:
Step 1 selects to comprise in the frame structure down public common of the bit that not have use and do not launch;
Step 2, the dynamic parameter of multiplexing renewal in the radio frames of down public common;
Step 3, user terminal read and the radio frames according to down public common in multiplexing dynamic parameter calculate up Initial Trans.
The above-mentioned method that reduces the time-delay of WCDMA system calling, wherein, described dynamic parameter is a uplink interference, described down public common is a Page Indication Channel.
The above-mentioned method that reduces the time-delay of WCDMA system calling, wherein, in the described step 2, the uplink interference of multiplexing renewal in the radio frames of described Page Indication Channel by the following method: the described uplink interference of 6 bits is repeated once, carry out interleaving treatment then, transmit by last 12 bits of described each frame of Page Indication Channel.
The above-mentioned method that reduces the time-delay of WCDMA system calling, wherein, in the described step 2, the dynamic parameter of multiplexing renewal in the radio frames of down public common by the following method: the method for the uplink interference bit being carried out chnnel coding, increase coding gain, and transmit by last 12 bits of described each frame of Page Indication Channel.
The above-mentioned method that reduces the time-delay of WCDMA system calling wherein, for guaranteeing the probability of acceptance of uplink interference bit, can increase a power excursion when sending the uplink interference bit.
The above-mentioned method that reduces the time-delay of WCDMA system calling, wherein, described step 2 specifically comprises:
Step 21 is carried out 1/2 convolutional encoding to the uplink interference of 6 bits;
Step 22 becomes 24 bits with 28 bit through-rate matching algorithms;
Step 23 interweaves 24 bits;
Step 24,24 bits after will interweaving are filled in two continuous Page Indication Channel radio frames.
The method of the WCDMA of reducing system calling time-delay of the present invention is by the multiplexing dynamic parameter that influences call set-up time in down public common, make the user can obtain the dynamic parameter that influences call set-up time fast, thereby reduced the time of call setup, utilize the reservation bit of PICH to carry out the transmission of uplink interference simultaneously, extraordinary back compatible is arranged.Simultaneously, because uplink interference itself is measured by NODE B, the mode that brings UE by SIB7 needs NODE B to give RNC with upstream interference report, by RNC (Radio Network Controller, radio network controller) issues UE by the system message of RRC (Radio ResourceControl, RRM) layer.Get final product in the PICH frame and uplink interference directly is multiplexed into by NODE B of the present invention, realize simple, meet third generation mobile partner plan (3rd Generation Partnership Project simultaneously, abbreviation 3GPP) Long Term Evolution is simplified the function of RNC in the works, strengthens the thinking of NODE B function.
Description of drawings
Fig. 1 is the flow chart that reduces the method for WCDMA system calling time-delay of the present invention;
Fig. 2 is the frame structure schematic diagram of PICH;
Fig. 3 for the sub-district set up after with the multiplexing particular flow sheet in the PICH channel of uplink interference;
Fig. 4 is the frame structure schematic diagram after the multiplexing uplink interference of PICH.
Embodiment
In the method that reduces WCDMA system calling time-delay of the present invention, be multiplexed into by the dynamic parameter that will influence call set-up time and send to UE in the down public common, reduce to call out and delay time.
In specific embodiments of the invention, be uplink interference with the dynamic parameter, Page Indication Channel is that down public common is that example describes.
As shown in Figure 1, the method for the WCDMA of reducing system calling time-delay of the present invention comprises the steps:
After step 11, sub-district are set up, multiplexing uplink interference in the radio frames of cell downlink public physic channel, unless this physical channel deletion, otherwise all multiplexing uplink interference and keep the real-time update of this parameter in its radio frames;
Specific embodiments of the invention are selected the down public common of Page Indication Channel (Paging Indicator Channel is called for short PICH) as multiplexing uplink interference.Page Indication Channel is a fixed rate, and spreading factor is 256, is used to carry paging indication (Paging Indicator is called for short PI).The frame structure of PICH comprising the paging indication information of 288 bits, comprises that also 12 bits do not have to use and do not launch as shown in Figure 2, and the present invention just is used to transmit uplink interference with these 12 bits.
PICH channel and paging channel (Paging Channel, abbreviation PCH) corresponding one by one between, each resident UE has its corresponding PICH channel in the sub-district, uplink interference is multiplexed in the 10ms radio frames of PICH channel, UE reads multiplexing uplink interference in its corresponding PICH channel wireless frame before calling out, can obtain this parameter fast and reduce the calling time-delay.
Uplink interference need be transmitted with taking 6 bits, and the PICH channel does not have coding gain, can correctly receive the uplink interference among the PICH in order to guarantee UE, can adopt but is not limited to following method:
First method repeats the uplink interference of 6 bits once, carries out interleaving treatment then, is transmitted by last 12 bits of each frame of PICH;
Second method, on the basis of first method, when sending the uplink interference bit, increase a power excursion, increase the probability of acceptance of UE to uplink interference, this is not in the PICH channel of eating dishes without rice or wine, be to increase a power when sending the uplink interference bit to launch, as shown in Figure 4, the power offset parameter of emission uplink interference disposes the B to NODE by the signaling of Iub mouth;
Third party's method adopts the method for the uplink interference bit being carried out chnnel coding, increases the probability of acceptance of UE to uplink interference by coding gain;
Cubic method on the basis of third party's method, increases a power excursion when sending the uplink interference bit, increase the probability of acceptance of UE to uplink interference.
In the same way,, also it can be multiplexed into and send to UE in the down public common, reduce and call out time-delay for similar with uplink interference and influence the dynamic parameter of call set-up time.
Be that example further specifies with first method below.
The sub-district is multiplexing in the PICH channel with uplink interference after setting up, and as shown in Figure 3, specifically comprises the steps:
Step 31, the uplink interference of 6 bits is at first carried out 1/2 convolutional encoding, according to the convolutional encoding scheme of 1/2 code check: Yi=2*Ki+16, the code block bit number of Ki before wherein for coding, Yi becomes 28 bits through uplink interference after 1/2 the convolutional encoding like this for the code block bit number after encoding;
Step 32 becomes 24 bits with 28 bit through-rate matching algorithms;
Step 33 interweaves 24 bits;
Step 34,24 bits after will interweaving are filled in two continuous PICH radio frames, read for the ease of UE, can arrange first radio frames is SFN mod 2=0, second radio frames is SFNmod 2=1, wherein SFN is System Frame Number, the expression system frame number, and the PICH frame structure after multiplexing is as shown in Figure 4;
UE reads the uplink interference bit behind the coding in the PICH radio frames before making a call, and obtain uplink interference by the inverse process decoding of coding, if the moment that UE makes a call is SFN mod 2=0,20ms when then UE acquisition uplink interference costs, if the moment that UE makes a call is SFN mod 2=1,30ms when then UE obtains uplink interference and costs and compares by reading the method that SIB7 obtains uplink interference, and present embodiment can reduce the calling of about 50ms and delay time;
Calculate the Initial Trans of UE according to uplink interference.
The present invention utilizes the reservation bit of PICH to carry out the transmission of uplink interference, and extraordinary back compatible is arranged.For example the R5 version has been realized the present invention, and then when the UE of R99, R4 is in the network of R5, without any influence, the UE of R99, R4 still obtains uplink interference by reading SIB7 to it for multiplexing uplink interference among the PICH; And R5 is the UE of above version in the network of R99, R4 version the time, because last 12 bits of each frame of PICH do not send, the UE of R5 can also obtain uplink interference by reading SIB7.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (7)
1. a method that reduces WCDMA system calling time-delay is characterized in that, the uplink interference that influences call set-up time is multiplexed into sends to user terminal in the Page Indication Channel, calculates Initial Trans after reading uplink interference by described user terminal.
2. the method that reduces the time-delay of WCDMA system calling according to claim 1 is characterized in that, specifically comprises the steps:
Step 1 selects to comprise in the frame structure Page Indication Channel of the bit that not have use and do not launch;
Step 2, the uplink interference of multiplexing renewal in the radio frames of Page Indication Channel;
Step 3, user terminal read and the radio frames according to Page Indication Channel in multiplexing uplink interference calculate up Initial Trans.
3. the method that reduces the time-delay of WCDMA system calling according to claim 2, it is characterized in that, in the described step 2, the uplink interference of multiplexing renewal in the radio frames of described Page Indication Channel by the following method: the described uplink interference of 6 bits is repeated once, carry out interleaving treatment then, transmit by last 12 bits of described each frame of Page Indication Channel.
4. the method that reduces the time-delay of WCDMA system calling according to claim 2, it is characterized in that, in the described step 2, the uplink interference of multiplexing renewal in the radio frames of Page Indication Channel by the following method: the method for the uplink interference bit being carried out chnnel coding, increase coding gain, and transmit by last 12 bits of described each frame of Page Indication Channel.
5. according to claim 3 or the 4 described methods that reduce the time-delay of WCDMA system calling, it is characterized in that, when sending the uplink interference bit, increase a power excursion.
6. the method that reduces the time-delay of WCDMA system calling according to claim 3 is characterized in that described step 2 specifically comprises:
Step 21 is carried out 1/2 convolutional encoding to the uplink interference of 6 bits;
Step 22 becomes 24 bits with 28 bit through-rate matching algorithms;
Step 23 interweaves 24 bits;
Step 24,24 bits after will interweaving are filled in two continuous Page Indication Channel radio frames.
7. the method that reduces the time-delay of WCDMA system calling according to claim 6 is characterized in that, SFN mod 2 differences of described two Page Indication Channel radio frames continuously.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200610011125A CN1997218B (en) | 2006-01-06 | 2006-01-06 | A method for reduction of the call delay of the WCDMA system |
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| CN200610011125A CN1997218B (en) | 2006-01-06 | 2006-01-06 | A method for reduction of the call delay of the WCDMA system |
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| CN1997218A CN1997218A (en) | 2007-07-11 |
| CN1997218B true CN1997218B (en) | 2010-05-12 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1399424A (en) * | 2001-07-20 | 2003-02-26 | 华为技术有限公司 | Variable-power regulation access method for CDMA communication system |
| CN1433175A (en) * | 2001-12-29 | 2003-07-30 | 三星电子株式会社 | Mobile communication equipment and method with several sending and receiving antennas |
| CN1450822A (en) * | 2002-04-09 | 2003-10-22 | 三星电子株式会社 | Mobile communication apparatus with multiple transmission and reception antennas and mobile communcation method therefor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1399424A (en) * | 2001-07-20 | 2003-02-26 | 华为技术有限公司 | Variable-power regulation access method for CDMA communication system |
| CN1433175A (en) * | 2001-12-29 | 2003-07-30 | 三星电子株式会社 | Mobile communication equipment and method with several sending and receiving antennas |
| CN1450822A (en) * | 2002-04-09 | 2003-10-22 | 三星电子株式会社 | Mobile communication apparatus with multiple transmission and reception antennas and mobile communcation method therefor |
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| CN1997218A (en) | 2007-07-11 |
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