CN101765141B - Method for coordinating interferences among HSUPA substricts in TD - SCDMA system - Google Patents
Method for coordinating interferences among HSUPA substricts in TD - SCDMA system Download PDFInfo
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Abstract
The present invention provides new public measurement of E-PUCH Overload Ratio, which is defined as the following: the E-PUCH Overload Ratio: the ratio of times that the average interference of time gaps for loading E-PUCH source in every 5ms TTI is above ROT threshold to the total number of TTI in an appointed period is counted in a base station (Node B) in an appointed period. The new public measurement can support period reporting. By the present invention, interference sources in nearby regions which bring the overload ratio of some subdistrict to high can be detected by the tactic of grades of a base station controller (RNC), and the effect of the interference sources is reduced by reasonable measures. Disadvantages that the base station (Node B) can not know the information of the nearby regions, and a high overload ratio condition of the subdistrict can not be solved by controlling the interference of the nearby regions are solved well, and the HSUPA throughput ratio of a whole net can be effectively improved.
Description
Technical field:
The present invention relates to TD SDMA and insert (Time Division-Synchronous CodeDivision Multiple Access-TD-SCDMA) system, particularly a kind of Inter-Cell Interference Coordination technology in high speed uplink packet access (HSUPA-High Speed Uplink Packet Access) technology.
Background technology:
The middle high-speed ascending grouping access characteristic of having introduced of 3-G (Generation Three mobile communication system).In the HSUPA characteristic; Through introducing adaptive coding and modulating (AMC:Adaptive Modulation andCoding), mixing automatic repeat requests (HARQ:Hybrid Automatic RetransmissionReq user) technology and the relevant technology that reduces the network processes time delay; The upstream packet service rate of higher rate is provided, improves spectrum utilization efficiency.
In the technology of HSUPA, obtain maximum throughput rate in order to make the user at up direction, base station (Node B) always attempts in ROT (Rise Over Thermal) threshold range, for subscriber authorisation power resource as much as possible in the hope of obtaining higher throughput.Being accompanied by the commercial scale of HSUPA enlarges gradually; Because the TD-SCDMA system adopts the mode of identical networking; This power authorization causes up direction phase mutual interference increasing between neighbor cell easily in the HSUPA technology; Thereby cause the interference level of whole net constantly to raise, can have a strong impact on the up throughput of whole network conversely again.Although the mode that base station (Node B) attempts through reducing user emission power in this sub-district is controlled at the interference level of this sub-district within the threshold range of ROT; But in fact because TD-SCDMA system uplink direction has adopted the technology of joint-detection; Interference in the sub-district between the user can eliminate the overwhelming majority through associated detection technique; The same frequency that total interference in the sub-district mainly comes from neighbor cell disturbs; Because the architectural framework of 3G system has determined base station (Node B) can't learn that the end is that which neighbor cell produces strong jamming to current area; Therefore base station (Node B) interference source that can't influence neighbor cell is effectively controlled, and base station (Node B) only can't reduce this regulative mode that disturbs the adjacent area and be actually and be difficult to interference level effectively is controlled within the ROT threshold range through reducing this community user transmitting power.Therefore, the HSUPA of TD-SCDMA system is necessary to introduce the Inter-Cell Interference Coordination technology of being controlled by base station controller (RNC) very much.
Summary of the invention:
The object of the present invention is to provide the Inter-Cell Interference Coordination technology of the HSUPA technology in a kind of TD-SCDMA system,, thereby improve the throughput of the up direction HSUPA of whole net so that the uplink interference level of whole network is controlled effectively.。
The present invention will provide the Inter-Cell Interference Coordination technology of HSUPA in a kind of TD-SCDMA system, and as shown in Figure 1, method of the present invention comprises the steps:
1, the periodicity public-measurement report E-PUCH OverLoad Ratio that base station (Node B) reports is received in some sub-districts of base station controller (RNC); Pre-set overload threshold if be higher than at E-PUCH OverLoad Ratio in the cycle of configurable time, then that this cell-overload rate is higher frequency and sub-district ID report the Inter-Cell Interference Coordination module of base station controller (RNC) level; If E-PUCH OverLoad Ratio is lower than the underloading thresholding that pre-sets in this cycle, think that then this sub-district underloading, frequency that the shore is higher with this cell-overload rate and sub-district ID report base station controller (RNC) level Inter-Cell Interference Coordination module.
2, base station controller (RNC) grade higher and underloading sub-district ID of the overload rate that the Inter-Cell Interference Coordination module will be collected, all sub-districts of information such as frequency notice current base station controller (RNC) administration.
3, each sub-district higher sub-district and frequency of overload rate whether As-received station control (RNC) level Inter-Cell Interference Coordination module is sent? If receive, meeting execution in step 4; Does otherwise each sub-district judge whether underloading sub-district and the frequency that As-received station control (RNC) level Inter-Cell Interference Coordination module is sent? If, execution in step 6, otherwise, finish.
4, current area detects and whether has the user who does not have the higher sub-district of pair overload rate to form interference source, and the user who forms interference source must satisfy two conditions: contiguous with the higher sub-district of overload rate; And frequency and overload frequency point co-frequency that this UE is resident in the overload adjacent area; Following several kinds of determination methods are arranged:
4a, through periodically or the measurement of incident property, judges is at overload rate higher nearby region measurement PCCPCH RSCP or path loss is lower than one pre-sets thresholding?
4b, through periodically or the measurement of incident property, judges this cell measurement to PCCPCH RSCP or path loss and the higher adjacent sub-district of overload rate path loss measures PCCPCH RSCP or the path loss difference is lower than one pre-sets thresholding?
If have, think that then these users are interference source and execution in step 5; Otherwise thinking does not have interference source, finishes.
5, base station controller (RNC) is to being that the user of interference source falls to disturb and handles.Fall that disturb to handle can be the method that combines of following any one or several method:
5a, reduction are considered to interference source user's dispatching priority (SPI-Shedule Priority Indicator), reduce base station (Node B) and dispatch this user's probability.
5b, direct informing base station (Node B) are the user's of interference source ID, let the less power mandate to this user in base station (Node B) perhaps reduce the scheduling frequency to these users.
5c, will be considered to the interference source user and migrate to the lighter frequency of other loads.
5d, will be considered to the interference source user and migrate on the DCH channel from the E-PUCH channel.
5e, will be considered to the adjacent area that the interference source user forces to switch to other homologous rays or different system.
The ROT thresholding of 5f, downward modulation current area.
Does 6, current area judge whether to have neighboring BS relationship with the underloading sub-district? If then execution in step 7; Otherwise, finish
7, carried out the processing of falling interference to the sub-district and the frequency of underloading before current area judges whether? If, then carry out and recover to handle, recover to handle and can adopt following any one or a few combination
If 7a has adopted the said processing method of 5a step before, being taken as before then recovering is the dispatching priority (SPI) of interference source;
If 7b has adopted the said processing method of 5b step before, then to be taken as before be interference source user's ID to informing base station (Node B), and recover normal power mandate and scheduling;
If 7c has adopted the said processing method of 5c step before, then be left intact;
If 7d has adopted the said processing method of 5d step before, then will before to be taken as be that the user of interference source moves back the E-PUCH channel from DCH;
If 7e has adopted the said processing method of 5e step before, then be left intact;
If 7f has adopted the said processing method of 5f step before, then recover the Rot thresholding of current area;
Through the present invention, can detect the adjacent area interference source that causes certain cell-overload rate high through other strategy of base station controller (RNC) level, and reduce the influence of these interference sources through rational measure.Well solved base station (Node B) and can't know neighboring BS information, can't solve the shortcoming of the higher situation of this cell-overload rate, can effectively improve the HSUPA throughput of whole net through the interference of control adjacent area.
Description of drawings:
Fig. 1: implementation framework sketch map of the present invention;
Fig. 2: realization flow figure of the present invention;
Embodiment:
The present technique scheme is introduced a kind of new public-measurement E-PUCH overload rate, and the definition of this measurement is following:
E-PUCH overload rate (E-PUCH OverLoad Ratio): base station in designated period (Node B)) adds up the ratio that the time slot average interference of carrying the E-PUCH resource in each 5ms TTI surpasses TTI sum in ROT thresholding number of times and the designated period.This measurement can be supported periodically to report.
If the overload rate that base station (Node B) reports in lasting a period of time is in a higher level, think that then base station (Node B) can't be controlled in the reasonable range through the interference level of sub-district internal power authorization with this frequency.Need to start the Inter-Cell Interference Coordination strategy of base station controller (RNC) level
Step 101: base station (Node B) periodically reports each frequency overload rate of current area to measure E-PUCH OverLoad Ratio.
Does step 102: base station controller (RNC) judge that whether each frequency E-PUCHOverLoad Ratio is above pre-seting overload threshold in designated period? If, execution in step 103; Otherwise, execution in step 104;
Step 103: base station controller (RNC) will transship indication, current area ID, the Inter-Cell Interference Coordination module of overload rate higher-frequency period informing base station controller (RNC) level, execution in step 106.
Is step 104: base station controller (RNC) judged that each frequency E-PUCHOverLoad Ratio is lower than in designated period and is pre-seted the underloading thresholding? If, execution in step 105; Otherwise, execution in step 115.
Step 105: base station controller (RNC) is indicated underloading, current area ID, the Inter-Cell Interference Coordination processing module of frequency point number informing base station controller (RNC) level of underloading, execution in step 111.
Step 106: the Inter-Cell Interference Coordination instruction is sent in all sub-districts in this base station controller (RNC) administration, and carries the higher sub-district ID of overload rate and corresponding frequency ID, execution in step 107.
Step 107: when the Inter-Cell Interference Coordination instruction was received in the sub-district, whether the inspection current area existed with the higher sub-district of overload rate
Neighboring BS relationship? If then execution in step 108; Otherwise, execution in step 115.
Step 108: will reside in the higher frequency point co-frequency of neighbor cell overload rate and user that carry on the HSUPA resource and send phase in cycle property or incident property common frequency measurement or different-frequency measure; Require the path loss of these reporting of user current area and frequently same or alien frequencies adjacent area, execution in step 109.
Step 109: behind this sub-district of reporting of user and adjacent area path loss; Base station controller (RNC) judge current area path loss and the higher adjacent area of overload rate path loss difference is lower than one pre-sets thresholding? If; Think that then the active user is an interference source, execution in step 110; Otherwise then execution in step 115.
Step 110: the user to interference source adopts following one or several measures, reduces its interference to the adjacent area.
110a, the professional dispatching priority (SPI) of the current interference source of reduction reduce base station (NodeB) and dispatch this user's probability.
The user's of 110b, direct informing base station (Node B) interference source ID lets the less power mandate to this user in base station (NodeB) perhaps reduce the scheduling to this user.
110c, will be that the user of interference source migrates to other frequencies.
110d, will be that the user of interference source migrates on the DCH channel from the E-PUCH channel.
110e, will be the adjacent area that user's system of interference source switches to other homologous rays or different system.
There are the ROT thresholding of current area in 110f, downward modulation.
Step 111: the Inter-Cell Interference Coordination instruction is sent in all sub-districts in this base station controller (RNC) administration, and carries the sub-district ID and corresponding frequency ID, execution in step 112 of underloading;
Step 112: when Inter-Cell Interference Coordination when instruction received in the sub-district, whether the inspection current area exists with the sub-district of underloading
Neighboring BS relationship? If then execution in step 113; Otherwise, execution in step 115.
Does step 113: the sub-district judge whether to do to fall to disturb to underloading frequency on the underloading adjacent area before to handle? If then execution in step 114; Otherwise, execution in step 115.
Step 114: carry out to fall to disturb and recover to handle, can combine by following any or several kinds of measures:
If 114a has carried out the said method of step 110a before, be taken as interference source user's (SPI) before then recovering.
If 114b has carried out the said method of step 110b before, the ID that directly notifies NodeB to be taken as the interference source user before lets NodeB recover power mandate and scheduling to these users.
If 114c has carried out the said method of step 110c before, then be left intact.
If 114d has carried out the said method of step 110d before, then will be taken as before is that the interference source ID moves back on the E-PUCH from DCH.
If 114e has carried out the said method of step 110e before, then be left intact.
If 114f has carried out the said method of step 110f before, then recover the ROT thresholding of current area.
Step 115: finish.
Claims (5)
1. HSUPA inter-cell interference coordination method in the TD-SCDMA system is characterized in that, comprises following treatment step:
Step 1, base station periodically report each frequency overload rate of current area to measure E-PUCH OverLoad Ratio; If E-PUCH OverLoad Ratio is higher than the overload threshold that pre-sets or is lower than the underloading thresholding that pre-sets in designated period, give base station controller level Inter-Cell Interference Coordination module with this cell-overload/underloading information reporting;
Step 2, base station controller level Inter-Cell Interference Coordination module are notified the cell-overload of collecting/underloading information all sub-districts of current base station controller administration;
Step 3, each sub-district cell-overload information whether As-received station control level Inter-Cell Interference Coordination module is sent, if receive, meeting execution in step 4; Otherwise each sub-district judges whether the sub-district underloading information that As-received station control level Inter-Cell Interference Coordination module is sent, if, execution in step 6, otherwise, finish;
Whether step 4, current area detect to have apart from the higher sub-district of overload rate is closer it are formed the user of interference source;
Step 5, base station controller are to being that the user of interference source falls to disturb and handles, and flow process finishes;
Step 6, current area judge whether to have neighboring BS relationship with the underloading sub-district, if then execution in step 7; Otherwise, finish;
Before judging whether, step 7, current area carried out the processing of falling interference, if then carry out and recover to handle to the underloading sub-district; Otherwise flow process finishes.
2. the method for claim 1 is characterized in that, described cell-overload information comprises frequency and the sub-district ID that the cell-overload rate is higher, and described sub-district underloading information comprises frequency and the sub-district ID that the cell-overload rate is lower.
3. according to claim 1 or claim 2 method is characterized in that, the concrete implementation of step 4 can be following arbitrary mode:
4a, through periodically or the measurement of incident property, whether judges is lower than one at overload rate higher nearby region measurement PCCPCH RSCP or path loss pre-sets thresholding;
4b, through periodically or the measurement of incident property, judges this cell measurement to PCCPCH RSCP or path loss and the higher adjacent cell measurement of overload rate whether be lower than one to PCCPCH RSCP or path loss difference and pre-set thresholding.
4. method as claimed in claim 3 is characterized in that, step 5 specifically can adopt following any mode to realize:
5a, reduction are considered to interference source user's dispatching priority (SPI-Schedule Priority Indicator), reduce base station (Node B) and dispatch this user's probability;
5b, direct informing base station (Node B) are the user's of interference source ID, let the less power mandate to this user in base station (Node B) perhaps reduce the scheduling frequency to these users;
5c, will be considered to the interference source user and migrate to the lighter frequency of other loads;
5d, will be considered to the interference source user and migrate on the DCH channel from the E-PUCH channel;
5e, will be considered to the adjacent area that the interference source user forces to switch to other homologous rays or different system;
The ROT thresholding of 5f, downward modulation current area.
5. method as claimed in claim 4 is characterized in that, the recovery described in the step 7 is handled and can be adopted following any one or a few combination:
Adopted the said processing method of 5a step if 7a disturbs to handle, being taken as before then recovering is the dispatching priority SPI of interference source;
Adopted the said processing method of 5b step if 7b disturbs to handle, then being taken as before the informing base station is interference source user's ID, and recovers normal power mandate and scheduling;
Adopted the said processing method of 5c step if 7c disturbs to handle, then be left intact;
Adopted the said processing method of 5d step if 7d disturb to handle, then will before to be taken as be that the user of interference source moves back the E-PUCH channel from DCH;
Adopted the said processing method of 5e step if 7e disturbs to handle, then be left intact;
Adopt the said processing method of 5f step if 7f disturbs to handle, then recovered the ROT thresholding of current area.
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| CN102378189B (en) * | 2010-08-12 | 2015-06-17 | 鼎桥通信技术有限公司 | Method, equipment and system for switching user equipment between master carrier and slave carrier in cell |
| CN103067966B (en) * | 2011-10-20 | 2018-01-16 | 上海无线通信研究中心 | The recognition methods of interference source in up going route in hybrid network |
| WO2013013515A1 (en) * | 2011-07-25 | 2013-01-31 | 上海无线通信研究中心 | Method for controlling uplink interference in hybrid network |
| CN102905302B (en) * | 2011-07-25 | 2017-02-22 | 上海无线通信研究中心 | Method for controlling uplink interference in hybrid network |
| CN103052075B (en) * | 2011-10-13 | 2018-10-12 | 南京中兴软件有限责任公司 | A kind of coordination approach and device of co-channel interference |
| WO2015013854A1 (en) * | 2013-07-29 | 2015-02-05 | 华为技术有限公司 | Resource scheduling method, and data transmission method and device |
| CN117318740A (en) * | 2022-06-23 | 2023-12-29 | 中兴通讯股份有限公司 | Uplink co-channel interference cancellation method, communication device and medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1571292A (en) * | 2004-04-29 | 2005-01-26 | 中兴通讯股份有限公司 | A method for controlling inter-frequency load balancing in WCDMA system |
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| CN101207890A (en) * | 2006-12-18 | 2008-06-25 | 中兴通讯股份有限公司 | Method for reducing district over loading rate in high speed uplink grouping access system |
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