CN1862989A - Method for controlling interference of high-speed up link packet access to adjacent cell - Google Patents
Method for controlling interference of high-speed up link packet access to adjacent cell Download PDFInfo
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- CN1862989A CN1862989A CN 200510111988 CN200510111988A CN1862989A CN 1862989 A CN1862989 A CN 1862989A CN 200510111988 CN200510111988 CN 200510111988 CN 200510111988 A CN200510111988 A CN 200510111988A CN 1862989 A CN1862989 A CN 1862989A
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Abstract
The invention relates to the power controlling technology in the mobile communication, the method of controlling the jam the high speed upward grouping connecting to the neighbor little section, the jam of the HUSPA moving station to the non HUSPA little section can be controlled effectively. In the invention, the incepting load index of all the little section can be inspected, if it is exceeds the standard, the base station controller would find the moving station connecting wirelessly with the little section with the exceeding the standard and connecting HSUPA with other little sections, the full of the moving station or the member of the moving station can be limited maximal transmitting power. The maximal transmitting power of the moving station can be restricted by limiting the maximal allowing operation speed or collocating again the operation to conventional and special channel. When choosing the moving station limit the maximal transmitting power, the choose number can be the fixing number and calculated to gain according to the degree of the receiving loading index exceeding the limit, so the moving station can be arranged according to the scheduled list, they are elected by turns according to the arranging result.
Description
Technical Field
The invention relates to a power control technology in mobile communication, in particular to a method for controlling interference of high-speed uplink packet access to a neighboring cell.
Background
In a Wideband Code Division Multiple Access (WCDMA) communication system, a client mobile terminal is called a mobile station, wherein the mobile station may be a mobile phone, a notebook computer with a wireless Access module, or a mobile communication device installed in a vehicle, and the mobile communication device can perform voice and/or data communication services through a CDMA system, for example: telephone calls, faxes, web browsing, and sending and receiving e-mail, among others.
The radio network coverage of a CDMA system is divided into geographical areas of cell areas, each cell area being served by a base station, i.e. the base station providing radio coverage within the area, which communicates over the air interface with mobile stations in the cell. And several base stations are connected to one base station controller.
With the development of networks, the proportion of data services used by users is continuously increased, and a High Speed Downlink Packet Access (HSDPA) and a High Speed Uplink Packet Access (HSUPA) are introduced into a system, so that the transmission rate of each cell can be increased to more than 10M.
The HSUPA system is mainly characterized by comprising: by adopting 2ms short frames or 10ms frames, Hybrid adaptive Repeat Request (HARQ for short) is adopted in a physical layer, and the uplink base station fast scheduling technology is adopted, so that the uplink spectrum efficiency is improved.
In addition, HSUPA requires two additional uplink Physical channels for the user, one is an enhanced-Dedicated Physical Data Channel (E-DPDCH) for transmitting Data, and the other is an enhanced-Dedicated Physical Control Channel (E-DPCCH) for transmitting the signaling associated with the Physical layer, and the latter provides the accompanying signaling for the demodulation of the former. In order to control the uplink transmission rate of a user, an absolute grant channel (E-AGCH) and a relative grant channel (E-RGCH) are added to a downlink channel, wherein the absolute grant channel exists only in a service wireless connection cell and is used for indicating the maximum transmission rate which can be transmitted by the user in an uplink mode, and the adjusted frequency is lower; the relative grant channel can exist in both the serving radio connection cell and the non-serving radio connection cell, and is used for instructing the user to adjust the uplink transmission rate according to a certain step, and the adjusted frequency is higher and can be up to once every 2 ms.
Wherein the indication transmitted in the relative grant channel is relative grant signaling (RG). In particular, when the mobile station is in a soft handover state, all cells with radio connection inform the mobile station by relative grant signaling to "reduce", "maintain" or "increase" the transmission power, or in other words the traffic rate, because a high traffic rate always requires a high transmission power. The mobile station adjusts the transmit power based on the combined results of all received relative grant signaling. One of the combining criteria of the mobile station for the relative grant signaling is: if there is a request for "decrease" in the received relative signaling, the mobile station will decrease the transmit power.
However, in actual situations, due to the base station function or the processing capability of the mobile station, for example, only supporting the legacy protocol or only supporting a limited number of relative grant channels, only some cells with radio connection may send relative grant signaling to the mobile station. Such cells that send relative grant signaling may be referred to as HSUPA cells, and cells that have connections but do not send relative grant signaling may be referred to as non-HSUPA cells.
Assume that the mobile station has a radio connection with both cell 1 and cell 2 and has established an HSUPA connection with cell 1, but for some reason as described above, no HSUPA connection is established with cell 2.
As shown in fig. 1, when a mobile station moves from cell 1 to cell 2, it can receive the relative grant signaling sent by cell 1, but does not receive the relative grant signaling from cell 2. As the mobile station moves away from cell 1, the transmit power of the mobile station is increased to achieve the traffic rate required by cell 1. At the same time, as the mobile station gets closer to cell 2, the interference of the mobile station transmission power to cell 2 will become more and more significant.
In this case, although cell 2 measures that its total received power exceeds the target, cell 2 may not receive the user signal normally because the mobile station cannot be notified to reduce the transmission power because the HSUPA connection is not established.
In practical applications, the above scheme has the following problems: excessive transmit power of HSUPA mobile stations may interfere with normal reception operations in non-HSUPA cells.
The main reason for this is that non-HSUPA cells have no control capability over the transmit power of HSUPA mobile stations.
Disclosure of Invention
In view of the above, the present invention provides a method for controlling interference of high speed uplink packet access to neighboring cells, so that interference of HSUPA mobile stations to non-HSUPA cells is effectively controlled.
In order to achieve the above object, the present invention provides a method for controlling interference of high speed uplink packet access to neighboring cells, comprising the following steps:
when the received load index of a cell exceeds a predetermined threshold, the base station controller looks up mobile stations having a radio connection with the cell other than high speed uplink packet access while having high speed uplink packet access connections with other cells, and signals all or a selected portion of the mobile stations to limit their maximum transmit power.
And the base station controller calculates the number of the mobile stations needing to limit the maximum transmitting power according to the degree that the receiving load index reported by the cell exceeds the preset threshold.
Further in the method, the number of mobile stations for which the base station controller needs to limit the maximum transmission power may be a predetermined set value.
In the method, the base station controller selects the mobile station whose maximum transmission power needs to be limited in turn by one or any combination of the following ways:
sorting the mobile stations from low to high according to the priority of the mobile stations;
ranking from high to low according to the transmitting power of the mobile station;
and sequencing the transmitting power of the mobile station from low to high according to the cell.
Further in the method, the base station controller selects in a random manner the mobile stations whose maximum transmit power needs to be limited.
Further in the method, the base station controller learns whether the received load index of the cell exceeds a predetermined threshold by one of:
the cell measures a receiving load index, and reports the receiving load index to the base station controller when the receiving load index exceeds the preset threshold; or,
and the cell measures a receiving load index and reports a measuring result to the base station controller periodically, and the base station controller judges whether the receiving load index reported periodically by the cell exceeds the preset threshold or not.
Further in the method, the receive load indicator comprises one or any combination of:
receiving total power, noise rise, and load factor.
Further in the method, the signaling limits the maximum transmit power of the mobile station by limiting the maximum allowed traffic rate of the mobile station; or,
the signaling limits the maximum transmit power of the mobile station by reconfiguring its traffic to a conventional dedicated channel.
In addition, in the method, the base station controller sends signaling limiting the maximum transmission power of the mobile station to the serving cell of the mobile station, and adjusts the service rate of the mobile station through the signaling of the serving cell.
Further in the method, the base station controller sends directly to the mobile station a signaling limiting the maximum transmit power of the mobile station.
By comparison, the technical solution of the present invention is mainly different from the prior art in that the received load indicators of all cells are monitored, if the received load indicators exceed the standard, the base station controller finds out the mobile stations having radio connection with the standard cell and HSUPA connection with other cells, and limits the maximum transmission power of all or a part of the mobile stations.
The maximum transmit power of the mobile station may be limited by limiting the maximum allowed traffic rate of the mobile station or reconfiguring the traffic to a conventional dedicated channel.
When selecting the mobile station whose maximum transmission power is to be limited, the number of selections may be a fixed value or may be calculated according to the degree of the overrun of the received load index, and the mobile stations to be selected may be sorted according to a predetermined policy (for example, the priority of the mobile station, the transmission power of the mobile station, or the transmission power of the mobile station by the cell), and are sequentially selected according to the sorting result.
The difference of the technical scheme brings obvious beneficial effects that the maximum transmitting power of the mobile stations which are in wireless connection with the cell with the overproof receiving load and in HSUPA connection with other cells is limited, so that the interference of the mobile stations to the non-HSUPA cells is effectively controlled, and the stability of the whole system is ensured.
Since the mobile station is selected according to the mobile station priority, the mobile station transmission power, or the result of the ranking of the cell to the mobile station transmission power, the efficiency of interference control for non-HSUPA cells can be improved.
Because a certain number of HSUPA mobile stations are adjusted at one time, gradual adjustment can be realized, the accuracy of adjustment is improved, and the influence on service due to over-adjustment is avoided.
Drawings
Fig. 1 is a diagram illustrating a mobile station moving from a cell 1 to a cell 2 in the prior art;
fig. 2 is a flowchart of a method for limiting maximum transmit power of an HSUPA mobile station according to a first embodiment of the present invention;
fig. 3 is a flowchart of a method for limiting maximum transmit power of an HSUPA mobile station according to a second embodiment of the present invention;
fig. 4 is a flowchart of a method for limiting maximum transmit power of an HSUPA mobile station according to a third embodiment of the present invention;
fig. 5 is a flowchart of a method for limiting maximum transmission power of an HSUPA mobile station according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
The invention finds out the mobile stations which have non-HSUPA wireless connection with the cell and have HSUPA connection with other cells simultaneously through the base station controller when the receiving load index of the cell exceeds the preset threshold, and sends out signaling to all or selected part of the mobile stations to achieve the purpose of limiting the maximum transmitting power.
The method for limiting the maximum transmission power of the HSUPA mobile station according to the first embodiment of the present invention is shown in fig. 2.
In step 201, each cell measures a load index of the received total power, and reports the load index to the base station controller when the load index exceeds a predetermined threshold.
In step 202, the base station controller calculates the number of mobile stations whose maximum transmission power needs to be limited according to the degree to which the total received power reported by the cell exceeds a predetermined threshold. In principle the more the received total power exceeds the predetermined threshold the more the number of mobile stations needs to be limited. Say. Assuming that the total received power of a cell exceeds a preset threshold of 6%, 2 mobile stations should be limited. Because a certain number of HSUPA mobile stations are adjusted at one time, gradual adjustment can be realized, the accuracy of adjustment is improved, and the influence on service due to over-adjustment is avoided.
In step 203, the mobile stations with non-HSUPA connections to the super-compliant cell and HSUPA connections to other cells are ranked from low to high priority and the 2 with the lowest priority are selected. The HSUPA mobile station needing to be adjusted is found out in a targeted mode, and the accuracy and the efficiency of adjustment can be improved. And the mobile station is selected according to the priority of the mobile station, and the data transmission requirement of a high-priority user can be ensured as far as possible while the interference to the non-HSUPA cell is controlled. The priority is specifically set by an operator, and may be set according to different user categories, such as different priorities of military network users, government users, and general users, or may be set according to different tariffs, such as higher priority of users with higher tariffs, or may be calculated by a formula to obtain the priority by combining various factors, and so on.
In step 204, the base station controller respectively sends relative grant signaling through the serving cells of the 2 mobile stations to adjust the maximum transmission power of the mobile stations, so as to achieve the purpose of controlling the maximum transmission power within the allowable range. This effectively controls the interference of these mobile stations to non-HSUPA cells.
The method for limiting the maximum transmission power of the HSUPA mobile station according to the second embodiment of the present invention is shown in fig. 3. The number of mobile stations selected for a single adjustment, for example 1 (or more), is preset in the base station controller.
In step 301, each cell monitors the noise rise index and reports it to the base station controller periodically.
In step 302, the base station controller judges whether the noise rise index of each cell exceeds the standard according to the reported index, if so, the step 303 is carried out; otherwise, step 301 and step 302 are repeated.
In step 303, the mobile stations having non-HSUPA connections with the out-of-standard cell and HSUPA connections with other cells are ranked according to their transmit power from high to low, and the 1 with the highest transmit power is selected. Likewise, selecting a mobile station based on its transmit power going from high to low may also improve the efficiency of interference control for non-HSUPA cells.
In step 304, the base station controller directly signals the mobile station to adjust its transmit power, which also achieves the purpose of controlling the maximum transmit power within the allowable range.
The method for limiting the maximum transmission power of the HSUPA mobile station according to the third embodiment of the present invention is shown in fig. 4. Also, the number of mobile stations selected for one adjustment, for example, 2, is preset in the base station controller.
In step 401, each cell monitors its load factor and reports to the base station controller when the load factor exceeds a predetermined threshold. The monitoring index of each cell may be other indexes besides the received total power, the noise rise and the load factor.
In step 402, the mobile stations with non-HSUPA connections to the super-standard cell and HSUPA connections to other cells are ranked according to the super-standard cell's transmit power from small to large, and the 1 mobile station with the smallest corresponding transmit power is selected. The distance between the cell and the mobile station with small transmitting power and the cell base station is short, the interference to the cell is large, and the efficiency of interference control to the non-HSUPA cell can be improved by selecting the mobile station as the object for limiting the maximum transmitting power.
In step 403, the traffic of the mobile station is transferred to a conventional dedicated channel. On the traditional dedicated channel, no matter the HSUPA cell or the non-HSUPA cell can participate in power control, the mobile station can synthesize the power control commands from each cell to make corresponding transmission power adjustment, so that the problem of large interference to a certain cell can not occur.
In step 404, the maximum transmission power of the mobile station is adjusted by each associated cell through the power control method of the dedicated channel on the conventional dedicated channel so as to be controlled within the allowable range.
A method for limiting the maximum transmission power of the HSUPA mobile station according to the fourth embodiment of the present invention is shown in fig. 5. Also, assume that 1 mobile station is preset in the base station controller for adjustment selection at a time. The main difference between this embodiment and the fourth embodiment is the manner in which the mobile station whose maximum transmission power is to be limited is selected.
Step 501 is the same as step 401, and is not described herein.
In step 502, 1 mobile station having non-HSUPA connections with the super-compliant cell and HSUPA connections with other cells is randomly selected. The random selection mode is simple to realize and does not need complicated sequencing operation.
Step 503 and step 504 are the same as step 403 and step 404, respectively, and are not described herein again.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A method for controlling interference to neighboring cells by high speed uplink packet access, comprising the steps of:
when the received load index of a cell exceeds a predetermined threshold, the base station controller looks up mobile stations having a radio connection with the cell other than high speed uplink packet access while having high speed uplink packet access connections with other cells, and signals all or a selected portion of the mobile stations to limit their maximum transmit power.
2. The method of claim 1, wherein the base station controller calculates the number of mobile stations whose maximum transmission power needs to be limited according to the degree to which the received load indicator reported by the cell exceeds the predetermined threshold.
3. The method of claim 1 wherein the number of mobile stations that the base station controller needs to limit its maximum transmit power is a predetermined value.
4. The method of claim 1, wherein the base station controller sequentially selects the mobile stations whose maximum transmission power needs to be limited by one or any combination of the following methods:
sorting the mobile stations from low to high according to the priority of the mobile stations;
ranking from high to low according to the transmitting power of the mobile station;
and sequencing the transmitting power of the mobile station from low to high according to the cell.
5. The method of claim 1, wherein the base station controller randomly selects the mobile station whose maximum transmit power needs to be limited.
6. The method of controlling interference to neighboring cells by high speed uplink packet access according to any of claims 1 to 5, wherein the base station controller knows whether the received load index of the cell exceeds a predetermined threshold by one of:
the cell measures a receiving load index, and reports the receiving load index to the base station controller when the receiving load index exceeds the preset threshold; or,
and the cell measures a receiving load index and reports a measuring result to the base station controller periodically, and the base station controller judges whether the receiving load index reported periodically by the cell exceeds the preset threshold or not.
7. The method of any of claims 1 to 5, wherein the received load indicator comprises one or any combination of the following:
receiving total power, noise rise, and load factor.
8. The method of controlling interference to neighboring cells by high speed uplink packet access according to any of claims 1 to 5, wherein the signaling limits the maximum transmit power of a mobile station by limiting its maximum allowed traffic rate; or,
the signaling limits the maximum transmit power of the mobile station by reconfiguring its traffic to a conventional dedicated channel.
9. The method of claim 8, wherein the base station controller sends signaling limiting the maximum transmit power of the mobile station to the serving cell of the mobile station, and adjusts the traffic rate of the mobile station through the signaling of the serving cell.
10. The method of claim 8 wherein the base station controller directly sends signaling to the mobile station limiting the maximum transmit power of the mobile station.
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| CNB200510111988XA CN100557998C (en) | 2005-12-26 | 2005-12-26 | Method for controlling interference of high-speed uplink packet access to neighboring cells |
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| CNB200510111988XA CN100557998C (en) | 2005-12-26 | 2005-12-26 | Method for controlling interference of high-speed uplink packet access to neighboring cells |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101146357B (en) * | 2007-10-23 | 2010-06-09 | 中兴通讯股份有限公司 | A quick access method in radio communication system |
| WO2012016395A1 (en) * | 2010-08-04 | 2012-02-09 | 中兴通讯股份有限公司 | Apparatus and method for controlling uplink interference based on load balance |
| WO2013189419A3 (en) * | 2013-04-03 | 2014-02-27 | 中兴通讯股份有限公司 | Method, system, low power base station, and rnc for collaborative management of interference |
| WO2016065646A1 (en) * | 2014-10-31 | 2016-05-06 | 华为技术有限公司 | Power estimation method and apparatus |
| CN108243490A (en) * | 2016-12-26 | 2018-07-03 | 大唐移动通信设备有限公司 | A kind of method and device for reducing uplink interference |
-
2005
- 2005-12-26 CN CNB200510111988XA patent/CN100557998C/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101146357B (en) * | 2007-10-23 | 2010-06-09 | 中兴通讯股份有限公司 | A quick access method in radio communication system |
| WO2012016395A1 (en) * | 2010-08-04 | 2012-02-09 | 中兴通讯股份有限公司 | Apparatus and method for controlling uplink interference based on load balance |
| WO2013189419A3 (en) * | 2013-04-03 | 2014-02-27 | 中兴通讯股份有限公司 | Method, system, low power base station, and rnc for collaborative management of interference |
| CN104105180A (en) * | 2013-04-03 | 2014-10-15 | 中兴通讯股份有限公司 | Interference cooperation management method, system, low power base station and RNC |
| WO2016065646A1 (en) * | 2014-10-31 | 2016-05-06 | 华为技术有限公司 | Power estimation method and apparatus |
| US10285140B2 (en) | 2014-10-31 | 2019-05-07 | Huawei Technologies Co., Ltd. | Power estimation method and apparatus |
| CN108243490A (en) * | 2016-12-26 | 2018-07-03 | 大唐移动通信设备有限公司 | A kind of method and device for reducing uplink interference |
| CN108243490B (en) * | 2016-12-26 | 2020-05-08 | 大唐移动通信设备有限公司 | Method and device for reducing uplink interference |
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| Publication number | Publication date |
|---|---|
| CN100557998C (en) | 2009-11-04 |
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Effective date of registration: 20211221 Address after: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee after: HUAWEI TECHNOLOGIES Co.,Ltd. Address before: 200121 No. 615 Nanjing Road, Shanghai, Pudong New Area Patentee before: SHANGHAI HUAWEI TECHNOLOGIES CO.,LTD. Effective date of registration: 20211221 Address after: 450046 Floor 9, building 1, Zhengshang Boya Plaza, Longzihu wisdom Island, Zhengdong New Area, Zhengzhou City, Henan Province Patentee after: xFusion Digital Technologies Co., Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |