CN100373805C - Adaptive absolute outer loop threshold setting method for mobile communication system - Google Patents
Adaptive absolute outer loop threshold setting method for mobile communication system Download PDFInfo
- Publication number
- CN100373805C CN100373805C CNB2005100019634A CN200510001963A CN100373805C CN 100373805 C CN100373805 C CN 100373805C CN B2005100019634 A CNB2005100019634 A CN B2005100019634A CN 200510001963 A CN200510001963 A CN 200510001963A CN 100373805 C CN100373805 C CN 100373805C
- Authority
- CN
- China
- Prior art keywords
- base station
- channel
- ratio
- complement channel
- total
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a method for setting self-adaption of an absolute outer ring threshold of a mobile communication system, which is characterized in that the present invention comprises following steps (1) a base station estimates noise interference factors of a forward complement channel; (2) the base station determines the ratio between emission power of the forward complement channel and total emission power of the base station; (3) the base station determines an initial valve of the outer ring threshold of the forward complement channel according to the noise interference factor estimated in the process (1) and the emission power ratio of the forward complement channel obtained in the process (2). The initial valve of the absolute outer ring is set through a radio condition when the forward complement channel is considered to be built up so as to improve the self-adaption ability of the initial valve of the outer ring threshold, to improve the retraction speed of forward power control, to improve the radio channel transmission quality and system capability and to reduce the interference to the system.
Description
Technical field
The present invention relates to the forward power control field in the mobile radio system, be specifically related to a kind of absolute outer loop threshold self adaptation method to set up.
Background technology
In mobile radio system, the mutual of information carried out by setting up Radio Link in travelling carriage and base station.The base station is called forward link to the link of travelling carriage, and travelling carriage is called reverse link to the link of base station.On the forward link, on the basis that guarantees the forward-link communication quality, improve overall system capacity, the interference that the reduction system produces neighbor cell need be carried out power control to it.Forward power control is by adjusting the communication quality that outer loop threshold guarantees forward link, as target frame error rate.Therefore, the initial value of outer loop threshold is extremely important, and it will determine the convergence rate of forward power control, and forward link is near the speed of destinations traffic quality, remote-effects power system capacity and interference level.
In the cdma wireless mobile communication system, the base station is set up a forward fundamental channel and is transmitted signaling and low speed data.The data volume that sends to travelling carriage when the base station increases, and when a forward fundamental channel can't meet the demands, the forward complement channel that the base station will be set up a high speed again transmitted data.The outer loop threshold initial value of forward complement channel be provided with dual mode: absolute outer shroud mode and relative outer shroud mode.Absolute outer shroud mode refers to that the outer loop threshold initial value of forward complement channel is a fixed value, and the outer shroud mode refers to that the outer loop threshold initial value of forward complement channel is side-play amount of outer loop threshold correction of forward fundamental channel relatively.
At present, the initial value set-up mode of absolute outer shroud is not considered forward complement channel foundation radio condition constantly, and is poor to the adaptive ability of wireless environment.If the outer loop threshold setting is too high, the waste power resource reduces power system capacity, increases the adjacent area and disturbs.If the outer loop threshold setting is too low, channel transmission quality is poor, and transmission is unstable, influences the throughput of link.
Summary of the invention
The purpose of this invention is to provide a kind of absolute outer loop threshold self adaptation method to set up, the initial value set-up mode that solves absolute outer shroud in the prior art is not considered forward complement channel foundation radio condition constantly, causes the problem of the adaptive ability difference of wireless environment.
In order to realize the foregoing invention purpose, the step of absolute outer loop threshold self adaptation method to set up provided by the invention is as follows:
Step 1: the noise jamming factor of base station estimation forward complement channel;
Step 2: the base station determines that emission power of forward supplementary channel accounts for the ratio of the total transmitting power in base station;
Step 3: according to the emission power of forward supplementary channel ratio that the noise jamming factor and the step 2 of step 1 estimation obtains, the outer loop threshold initial value of forward complement channel is determined in the base station.
Described step 1 comprises the steps: again
1.1 the ratio of moving table measuring forward channel chip energy and total received power spectrum density.Forward channel can be the Forward Pilot Channel or the forward fundamental channel of forward complement channel correspondence;
1.2 travelling carriage is passed to the base station by message with measured value;
1.3 the ratio of base station measurement forward channel chip energy and total transmit power spectral density.Forward channel can be the Forward Pilot Channel or the forward fundamental channel of forward complement channel correspondence;
1.4 the noise jamming factor of forward complement channel by the result of step 1.1 and step 1.3, is estimated in the base station.
Above-mentioned steps two comprises the steps: again
2.1 the transmitting power of forward complement channel is determined in the base station;
2.2 the ratio that emission power of forward supplementary channel accounts for the total transmitting power in base station is calculated in the base station.
Adopt method of the present invention, set up the initial value that radio condition constantly is provided with absolute outer shroud owing to considered forward complement channel, so can improve the adaptive ability of outer loop threshold initial value, accelerate the convergence rate of forward power control, improve the wireless channel transmission quality, power system capacity and reduction system interference.
Description of drawings
The forward power control schematic diagram of Fig. 1 CDMA mobile communication system;
The general flow chart of Fig. 2 the inventive method;
The example schematic of Fig. 3 the inventive method step 1;
The example schematic of Fig. 4 the inventive method step 2.
Embodiment
Below in conjunction with instantiation technical solutions according to the invention are described in further detail:
Fig. 1 has provided the forward power control mode in the CDMA mobile communication system, ring and two kinds of control modes of outer shroud in comprising.One or more of forward channels are set up according to the size judgement that sends to the mobile station data amount in base station 1.Set up forward complement channel if desired, the base station is by the initial outer loop threshold of message with this forward complement channel correspondence, and minimum outer loop threshold and maximum outer loop threshold send to travelling carriage.Travelling carriage is according to signal quality and outer loop threshold, determine still decline order (being called forward direction power control bit) of transmitted power rising order on reverse link, the base station receives after the forward direction power control bit, increases or reduce the transmitting power of forward complement channel according to the value of bit.
Fig. 2 is the general flow chart of the inventive method.The step 21 of Fig. 2 is noise jamming factors of base station estimation forward complement channel.Because with the corresponding Forward Pilot Channel of forward complement channel and the interference noise factor of forward fundamental channel and the interference noise factor of described forward complement channel is identical, therefore just can obtain the interference noise factor of corresponding forward complement channel by the interference noise factor of measuring Forward Pilot Channel or forward fundamental channel.Fig. 3 provides an example of the estimation forward complement channel interference noise factor.The step 31 of Fig. 3 is ratios of chip energy with the total received power spectrum density of moving table measuring Forward Pilot Channel or forward fundamental channel.If step 31 is ratios of chip energy with the total received power spectrum density of moving table measuring Forward Pilot Channel, step 33 is ratios of chip energy with total transmit power spectral density of base station measurement Forward Pilot Channel so.If step 31 is ratios of chip energy with the total received power spectrum density of moving table measuring forward fundamental channel, step 33 is ratios of chip energy with total transmit power spectral density of base station measurement forward fundamental channel so.Travelling carriage is told the result of step 31 test to the base station by message.The base station is in the interference noise factor of step 34 estimation forward complement channel.For example, the Forward Pilot Channel chip energy of step 31 mobile station side with the ratio of total received power spectrum density is
(E
cThe Forward Pilot Channel chip energy of expression mobile station side, I
0The total received power spectrum density of expression mobile station side, subscript MS represents travelling carriage), the Forward Pilot Channel chip energy of step 33 base station side with the ratio of total transmit power spectral density is
(E
bThe Forward Pilot Channel chip energy of expression base station side, I
OrTotal transmit power spectral density of expression base station side, subscript BS represents the base station), then the interference noise factor of forward complement channel is
If the forward fundamental channel chip energy of step 31 mobile station side with the ratio of total received power spectrum density is
The forward fundamental channel chip energy of expression mobile station side, I
oThe total received power spectrum density of expression mobile station side, subscript MS represents travelling carriage), the forward fundamental channel chip energy of step 33 base station side with the ratio of total transmit power spectral density is
The forward fundamental channel chip energy of expression base station side, I
OrTotal transmit power spectral density of expression base station side, subscript BS represents the base station)), then the interference noise factor of forward complement channel is
The step 22 of Fig. 2 is that the base station determines that emission power of forward supplementary channel accounts for the ratio of the total transmitting power in base station.Fig. 4 provides an example.The transmitting power of the forward fundamental channel of forward complement channel correspondence is at first measured in the base station in step 41, then in step 42, the base station is according to the demodulation performance difference of forward complement channel and forward fundamental channel, on the basis of forward fundamental channel transmitting power, increase certain correction, obtain the transmitting power of forward complement channel.At last, the ratio that emission power of forward supplementary channel accounts for the total transmitting power in base station is calculated in step 43 in the base station
(SCHE
cThe forward complement channel chip energy of expression base station side, I
OrTotal transmit power spectral density of expression base station side).
The step 23 of Fig. 2 is outer loop threshold initial values that forward complement channel is determined in the base station.The forward complement channel interference factor that obtains by step 21
The emission power of forward supplementary channel that obtains with step 22 accounts for the ratio of the total transmitting power in base station
The base station obtains the outer loop threshold initial value of forward complement channel
Wherein SCH_Chip_Bit is the forward complement channel spreading rate and the ratio of forward complement channel bit rate.If according to the interference noise factor of forward fundamental channel estimation forward complement channel, then the outer loop threshold initial value of forward complement channel is
The measuring process of the above-mentioned noise jamming factor, and the base station determines that outer loop threshold initial value that emission power of forward supplementary channel accounts for the process of ratio of the total transmitting power in base station and forward complement channel asks for process and be not limited to embodiment, and above-mentioned execution mode only is an exemplary illustration.
Claims (5)
- One kind in mobile communication system self adaptation the method for absolute outer loop threshold is set, it is characterized in that comprising the steps:(1) the noise jamming factor of base station estimation forward complement channel;(2) base station determines that emission power of forward supplementary channel accounts for the ratio of the total transmitting power in base station;(3) emission power of forward supplementary channel that obtains according to step (2) product that accounts for the ratio of the total transmitting power in base station and spreading rate and the ratio of forward complement channel bit rate is divided by estimation obtains the outer loop threshold initial value that the noise jamming factor obtains the forward complement channel determined the base station according to step (1).
- 2. method according to claim 1 is characterized in that, step (1) comprises the steps:(1.1) ratio of moving table measuring forward channel chip energy and total received power spectrum density;(1.2) travelling carriage is passed to the base station by message with measured value;(1.3) ratio of base station measurement forward channel chip energy and total transmit power spectral density;(1.4) the noise jamming factor of forward complement channel is calculated by the result of step (1.1) and step (1.3) in the base station;The interference noise factor of described forward complement channel is
For the ratio of the forward channel chip energy of base station side and total transmit power spectral density is
E bThe forward channel chip energy of expression base station side, I OrTotal transmit power spectral density of expression base station side, subscript BS represents the base station.
- 3. method according to claim 2 is characterized in that, described forward channel is the Forward Pilot Channel of this forward complement channel correspondence.
- 4. method according to claim 2 is characterized in that, described forward channel is the forward fundamental channel of this forward complement channel correspondence.
- 5. according to claim 1,3 or 4 described methods, it is characterized in that step (2) comprises the steps:(2.1) transmitting power of forward complement channel is determined in the base station;(2.2) ratio that emission power of forward supplementary channel accounts for the total transmitting power in base station is calculated in the base station;The ratio that described emission power of forward supplementary channel accounts for the total transmitting power in base station isSCHE wherein bThe forward complement channel chip energy of expression base station side, I OrTotal transmit power spectral density of expression base station side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100019634A CN100373805C (en) | 2005-01-13 | 2005-01-13 | Adaptive absolute outer loop threshold setting method for mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100019634A CN100373805C (en) | 2005-01-13 | 2005-01-13 | Adaptive absolute outer loop threshold setting method for mobile communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1805301A CN1805301A (en) | 2006-07-19 |
| CN100373805C true CN100373805C (en) | 2008-03-05 |
Family
ID=36867183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100019634A Expired - Fee Related CN100373805C (en) | 2005-01-13 | 2005-01-13 | Adaptive absolute outer loop threshold setting method for mobile communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100373805C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839740A (en) * | 2020-06-24 | 2021-12-24 | 中兴通讯股份有限公司 | Method, device and equipment for determining outer ring value and storage medium |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010033553A1 (en) * | 2000-02-03 | 2001-10-25 | Motorola, Inc. | Communication system transmit power control method |
| WO2002075955A1 (en) * | 2001-03-15 | 2002-09-26 | Qualcomm Incorporated | Method and apparatus for adjusting power control setpoint in a wireless communication system |
| CN1404321A (en) * | 2001-08-28 | 2003-03-19 | 株式会社Ntt都科摩 | Mobile communication system and base station for saving power consumption of mobile station in the same system |
| US20030064743A1 (en) * | 2001-09-28 | 2003-04-03 | Tao Chen | Method and apparatus for multi-channel reverse link outer-loop power control |
| US6587447B1 (en) * | 1999-09-29 | 2003-07-01 | Nortel Networks Limited | Method and system for performing outer loop power control in discontinuous transmission mode |
| CN1144391C (en) * | 1999-06-23 | 2004-03-31 | 摩托罗拉有限公司 | Apparatus and method for power control in a radio communication system |
| US20040203462A1 (en) * | 2002-11-25 | 2004-10-14 | Wei Lin | Method and apparatus for setting the threshold of a power control target in a spread spectrum communication system |
-
2005
- 2005-01-13 CN CNB2005100019634A patent/CN100373805C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1144391C (en) * | 1999-06-23 | 2004-03-31 | 摩托罗拉有限公司 | Apparatus and method for power control in a radio communication system |
| US6587447B1 (en) * | 1999-09-29 | 2003-07-01 | Nortel Networks Limited | Method and system for performing outer loop power control in discontinuous transmission mode |
| US20010033553A1 (en) * | 2000-02-03 | 2001-10-25 | Motorola, Inc. | Communication system transmit power control method |
| WO2002075955A1 (en) * | 2001-03-15 | 2002-09-26 | Qualcomm Incorporated | Method and apparatus for adjusting power control setpoint in a wireless communication system |
| CN1404321A (en) * | 2001-08-28 | 2003-03-19 | 株式会社Ntt都科摩 | Mobile communication system and base station for saving power consumption of mobile station in the same system |
| US20030064743A1 (en) * | 2001-09-28 | 2003-04-03 | Tao Chen | Method and apparatus for multi-channel reverse link outer-loop power control |
| US20040203462A1 (en) * | 2002-11-25 | 2004-10-14 | Wei Lin | Method and apparatus for setting the threshold of a power control target in a spread spectrum communication system |
Non-Patent Citations (3)
| Title |
|---|
| CDMA系统中的功率控制. 薛文虎，甘仲民.电波科学学报，第18卷第1期. 2003 * |
| CDMA蜂窝系统中前向链路容量的研究. 马汉炎，黄志钢.通信技术，第8期. 2002 * |
| 高速补充信道对cdma2000-1x前向链路功率分配的影响. 柴远波，罗兴国，丁有志，季新生，宋国文.通信学报，第24卷第6期. 2003 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1805301A (en) | 2006-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100818136B1 (en) | Method and apparatus for adaptive power control in a wireless voice and data communication system | |
| US6233439B1 (en) | Signal to noise estimation of forward link traffic channel for fast power control | |
| US6587447B1 (en) | Method and system for performing outer loop power control in discontinuous transmission mode | |
| EP1163739B1 (en) | Methods and apparatuses for controlling transmission power while in soft handoff | |
| CN1330105C (en) | System and method to combine power control commans during soft handoff in DS/CDMA cellular systems | |
| KR100656100B1 (en) | Power control in a cdma mobile communications system | |
| US7346034B2 (en) | Cellular system, mobile station, base station and transmission power control method as well as program to be executed for implementing the method | |
| US6771965B2 (en) | Communication control method in mobile communication system and base station used therefor | |
| US7746831B2 (en) | Method and apparatus for controlling gain level of a supplemental channel in a CDMA communication system | |
| CN101103555B (en) | Transmission power control method and mobile terminal device | |
| US6590874B1 (en) | Method and system for implementing outer loop power control in discontinuous transmission mode using explicit signalling | |
| US20070099648A1 (en) | Apparatus and method for controlling uplink load in a wireless communication system | |
| US20070036114A1 (en) | Dynamic radio link adaptation for interference in cellular systems | |
| US20060105717A1 (en) | Method and apparatus for determining a data rate | |
| EP1139685B1 (en) | Wireless communication device and transmission power control method | |
| CN101399579A (en) | Uplink (reverse link) power control method for radio communication system | |
| KR20000001794A (en) | Method and apparatus for controlling electric power within transmission of punched frame | |
| CN101753168B (en) | Method and system for correcting frequency offset of mobile communication system | |
| CN1184762C (en) | Method for controlling external loop power in WCDMA system | |
| CN100373805C (en) | Adaptive absolute outer loop threshold setting method for mobile communication system | |
| US20010033553A1 (en) | Communication system transmit power control method | |
| CN1449205A (en) | Dynamic optimization method and apparatus for power control | |
| US7308262B2 (en) | Controller and control method for mobile communication system | |
| CN100393171C (en) | Method and equipment for raising call completing rate in code division multiple access mobile communication system | |
| CN100544227C (en) | A kind of method of improving power control performance of mobile communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080305 Termination date: 20150113 |
|
| EXPY | Termination of patent right or utility model |