CN102457897A - Method and device for detecting interference to uplink pilot channel of base station of time division-synchronization code division multiple access (TD-SCDMA) system - Google Patents
Method and device for detecting interference to uplink pilot channel of base station of time division-synchronization code division multiple access (TD-SCDMA) system Download PDFInfo
- Publication number
- CN102457897A CN102457897A CN2011103218419A CN201110321841A CN102457897A CN 102457897 A CN102457897 A CN 102457897A CN 2011103218419 A CN2011103218419 A CN 2011103218419A CN 201110321841 A CN201110321841 A CN 201110321841A CN 102457897 A CN102457897 A CN 102457897A
- Authority
- CN
- China
- Prior art keywords
- sync
- protection section
- detection window
- interference
- base station
- 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.)
- Pending
Links
Images
Classifications
-
- Y02B60/50—
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method for detecting the interference to an uplink pilot channel (UpPCH) of a base station of a time division-synchronization code division multiple access (TD-SCDMA) system. The method comprises the following steps of: setting a subframe detection window, wherein the detection window comprises a synchronous_uplink (SYNC_UL) in an uplink pilot time slot (UpPTS), a protection section in front of the SYNC_UL and a protection section behind the SYNC_UL; and then calculating a power difference value, comparing the power difference value with a preset threshold value, and if the power difference value is less than the set threshold value, outputting an alarm signal. The invention also discloses a device for detecting the interference to the UpPCH of the base station of the TD-SCDMA system. By the method and the device for detecting the interference to the UpPCH of the base station of the TD-SCDMA system, the alarm signal can be output when the UpPCH of the base station is interfered greatly.
Description
Technical field
The present invention relates to wireless communication technology, particularly a kind of interference detection method and device of TD-SCDMA system base-station ascending pilot channel.
Background technology
Along with the development of radio communication is popularized; Mobile communication subscriber quantity rapid growth, and frequency spectrum resource is limited, how to reduce interference; Maximally utilise frequency spectrum resource, making limited bandwidth can carry customer volume as much as possible is the problem that each network vendors is concerned about very much.
TD-SCDMA (GSM TD SDMA) system adopts TDD mode.Subframe structure in the TD-SCDMA system is as shown in Figure 1, and each subframe of TD-SCDMA is divided into 7 main time slot TS0 of routine, TS1 ..., TS6 and 3 special time slots; 3 special time slots are as shown in Figure 2, be respectively descending pilot frequency time slot (DwPTS, 75us), uplink pilot time slot (UpPTS; 125us) with the protection time slot (GP, 75us), descending pilot frequency time slot (DwPTS; 75us) be made up of 64 descending synchronous code (SYNC-DL) chips and 32 protection chips, (UwPTS 125us) is made up of 128 uplink synchronous code (SYNC-UL) chips and 32 protection chips uplink pilot time slot; (GP 75us) is made up of 96 protection chips the protection time slot; In these 7 main time slots, Ts0 always distributes to down link, and Ts1 always distributes to up link, and other time slots can be used as the time slot of up link, also can be used as the time slot of down link.In this subframe structure, UpPCH (ascending pilot channel) is configured in the UpPTS (uplink pilot time slot) before the TS1.In the TD-SCDMA system; Keep between the different base station synchronously; Increase along with propagation distance; Up SYNC-UL (uplink synchronous code in the uplink pilot time slot) can receive such as formed interference behind the TS0 of telepoint base station and the DwPTS process propagation delay arrival target BS, thereby the access at terminal is impacted.As shown in Figure 3, the hypothetical target base station is Nb0, and two interference base stations are Nb1; Nb2, two interference base stations are respectively T1, T2 to the path time difference of target BS; The descending pilot frequency component gross power of launching when interference base station is bigger; And the time that descending interference pilot signal arrives target BS is when falling in ascending pilot frequency window detection time, just possibly constitute interference to the detection of target BS ascending pilot frequency, thereby influence the performance of target BS ascending pilot frequency detection.In case target BS is interfered, can not receive UpPCH, then whole sub-district all might get clogged, thereby also can not insert at random in this sub-district perhaps and can not be used for switching as Target cell.And as far as being in all UE (subscriber terminal equipment) in this sub-district, this situation that whole sub-district all gets clogged is unacceptable.It is thus clear that if the interference ratio that target BS ascending pilot channel (UpPCH) receives is bigger, the system that can influence inserts and capacity, has influence on the operate as normal of system.For fear of the generation of this situation, receive under the situation of larger interference at target BS ascending pilot channel (UpPCH), need provide warning, in time to take necessary workaround.
Summary of the invention
The technical problem that the present invention will solve is, when the interference that UpPCH receives in the base station is big, and can output alarm signal.
For solving the problems of the technologies described above, the invention provides a kind of interference detection method of TD-SCDMA system base-station ascending pilot channel, may further comprise the steps:
One. set the subframe detection window;
Said detection window by the SYNC_UL among the subframe UpPTS, reaches the protection section of SYNC_UL front, the protection section composition of SYNC_UL back;
Two. rated output difference Th
1
Th
1＝P
SYNC_UL-(P
1+P
2)；
In the formula, Th
1Be power difference, P
SYNC_ULBe the base station received signal power corresponding to the SYNC_UL among the subframe UpPTS in the detection window, P
1Be the base station received signal power corresponding to the protection section of the SYNC_UL front in the detection window, P
2Be base station received signal power corresponding to the protection section at the back of the SYNC_UL in the detection window;
Three. with said power difference Th
1Compare with predefined threshold value, if power difference Th
1Less than the threshold value of setting, then output alarm signal.
The protection section of said SYNC_UL front can be 1～96 chip, and the protection section of said SYNC_UL back can be 1～32 chip.
For solving the problems of the technologies described above, the invention provides a kind of interference detecting apparatus of TD-SCDMA system base-station ascending pilot channel, comprise detection window setting apparatus, interference detector, threshold compataror;
Said Interference Detection window setting apparatus is used to set the subframe detection window;
Said detection window by the SYNC_UL among the subframe UpPTS, reaches the protection section of SYNC_UL front, the protection section composition of SYNC_UL back;
Said interference detector is used for power output difference Th
1
Th
1＝P
SYNC_UL-(P
1+P
2)；
In the formula, Th
1Be power difference, P
SYNC_ULBe the base station received signal power corresponding to the SYNC_UL among the subframe UpPTS in the detection window, P
1Be the base station received signal power corresponding to the protection section of the SYNC_UL front in the detection window, P
2Be base station received signal power corresponding to the protection section at the back of the SYNC_UL in the detection window;
Said threshold compataror is used for the power difference Th with said interference detector output
1Compare with predefined threshold value, if power difference Th
1Less than the threshold value of setting, then output alarm signal.
The interference detection method and the device of TD-SCDMA system base-station ascending pilot channel of the present invention; Utilize uplink synchronous code in the subframe uplink pilot time slot to add that the protection section on both sides forms a detection window; Protect the difference of the base station received signal power of section part together through the base station received signal power that calculates the uplink synchronous code part in the uplink pilot time slot in the detection window; Detect the target BS ascending pilot channel and whether be interfered, when can be in the interference that the base station ascending pilot channel receives big, output alarm signal; Thereby in time take necessary workaround, avoid the operate as normal of the system that has influence on.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain.
Fig. 1 is the subframe structure sketch map in the TD-SCDMA system;
Fig. 2 is 3 special time slot sketch mapes of TD-SCDMA subframe;
Fig. 3 is the TD-SCDMA system base-station subframe UpPCH sketch map that is interfered;
Fig. 4 is the interference detecting apparatus one execution mode detection window sketch map of TD-SCDMA system base-station ascending pilot channel of the present invention;
Fig. 5 is the interference detection method one execution mode sketch map of TD-SCDMA system base-station ascending pilot channel of the present invention;
Fig. 6 is the interference detecting apparatus one execution mode sketch map of TD-SCDMA system base-station ascending pilot channel of the present invention.
Embodiment
As can beappreciated from fig. 2; The TD-SCDMA system terminal is after subframe uplink pilot time slot (UpPTS) sends uplink synchronous code (SYNC-UL); All there is protection section (GP) front and back of uplink synchronous code (SYNC-UL); If the interference that receives is less, the detected base station received signal power of these two parts protection Duan Shangneng should be very low, and at uplink pilot time slot; The base station receives that the gross power of the uplink synchronous code of the transmission at all terminals in the sub-district should be than higher; So can utilize uplink synchronous code to add a detection window of protection section composition on both sides, protect section difference of the base station received signal power of part together through the base station received signal power that calculates uplink synchronous code (SYNC_UL) part in the uplink pilot time slot in the detection window, to detect the interference that target BS ascending pilot channel (UpPCH) receives.In this detection window; The centre is the uplink synchronous code (SYNC-UL) of 128 chips in the subframe uplink pilot time slot; The front is the protection time slot (GP of subframe; The protection section of the SYNC_UL front that the partial protection chip of back 75us) constitutes, back are the protection sections of the SYNC_UL back that constitutes of the previous section of the protection chip in the uplink pilot time slot of subframe.
Interference detection method one execution mode of TD-SCDMA system base-station ascending pilot channel of the present invention is as shown in Figure 5, may further comprise the steps:
One. set the subframe detection window;
Detection window as shown in Figure 4; By the SYNC_UL(uplink synchronous code in the subframe uplink pilot time slot (UpPTS); 128 chips); Reach the protection section GP1 of SYNC_UL front, the protection section GP2 composition of SYNC_UL back; The protection section GP1 of SYNC_UL front can be 1～96 chip, and the protection section GP2 of SYNC_UL back can be for 1～32 chip, and is preferable; The protection section GP1 of SYNC_UL front is 90 chips, and the protection section GP2 of SYNC_UL back is 25 chips;
Two. rated output difference Th
1
Th
1＝P
SYNC_UL-(P
1+P
2)；
In the formula, Th
1Be power difference, P
SYNC_ULBe the base station received signal power corresponding to the SYNC_UL among the subframe UpPTS in the detection window, P
1Be the base station received signal power corresponding to the protection section of the SYNC_UL front in the detection window, P
2Be base station received signal power corresponding to the protection section at the back of the SYNC_UL in the detection window;
Three. with said power difference Th
1Compare with predefined threshold value, if power difference Th
1Less than the threshold value of setting, then output alarm signal.
Interference detecting apparatus one execution mode of TD-SCDMA system base-station ascending pilot channel of the present invention is as shown in Figure 6, comprises Interference Detection window setting apparatus, interference detector, threshold compataror;
Said Interference Detection window setting apparatus is used to set the subframe detection window, and detection window is as shown in Figure 4; By the SYNC_UL (uplink synchronous code in the subframe uplink pilot time slot (UpPTS); 128 chips), reach the protection section GP1 of SYNC_UL front, the protection section GP2 composition of SYNC_UL back, the protection section GP1 of SYNC_UL front can be 1～96 chip; The protection section GP2 of SYNC_UL back can be 1～32 chip; Preferable, the protection section GP1 of SYNC_UL front is 90 chips, the protection section GP2 of SYNC_UL back is 25 chips;
Said interference detector is used for power output difference Th
1
Th
1＝P
SYNC_UL-(P
1+P
2)；
In the formula, Th
1Be power difference, P
SYNC_ULBe the base station received signal power corresponding to the SYNC_UL among the subframe UpPTS in the detection window, P
1Be the base station received signal power corresponding to the protection section GP1 of the SYNC_UL front in the detection window, P
2Be base station received signal power corresponding to the protection section GP2 at the back of the SYNC_UL in the detection window;
Said threshold compataror is used for the power difference Th with said interference detector output
1Compare with predefined threshold value, if power difference Th
1Less than the threshold value of setting, then output alarm signal.
Behind said threshold compataror output alarm signal, can in time take the necessary technology measure, avoid the whole sub-district of target BS to get clogged.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.
Claims (6)
1. the interference detection method of a TD-SCDMA system base-station ascending pilot channel is characterized in that, may further comprise the steps:
One. set the subframe detection window;
Said detection window by the SYNC_UL among the subframe UpPTS, reaches the protection section of SYNC_UL front, the protection section composition of SYNC_UL back;
Two. rated output difference Th
1
Th
1＝P
SYNC_UL-(P
1+P
2)；
In the formula, Th
1Be power difference, P
SYNC_ULBe the base station received signal power corresponding to the SYNC_UL among the subframe UpPTS in the detection window, P
1Be the base station received signal power corresponding to the protection section of the SYNC_UL front in the detection window, P
2Be base station received signal power corresponding to the protection section at the back of the SYNC_UL in the detection window;
Three. with said power difference Th
1Compare with predefined threshold value, if power difference Th
1Less than the threshold value of setting, then output alarm signal.
2. the interference detection method of TD-SCDMA system base-station ascending pilot channel according to claim 1 is characterized in that, the protection section of said SYNC_UL front is 1～96 chip, and the protection section of said SYNC_UL back is 1～32 chip.
3. the interference detection method of TD-SCDMA system base-station ascending pilot channel according to claim 1 is characterized in that, the protection section of said SYNC_UL front is 90 chips, and the protection section of said SYNC_UL back is 25 chips.
4. the interference detecting apparatus of a TD-SCDMA system base-station ascending pilot channel is characterized in that, comprises detection window setting apparatus, interference detector, threshold compataror;
Said Interference Detection window setting apparatus is used to set the subframe detection window;
Said detection window by the SYNC_UL among the subframe UpPTS, reaches the protection section of SYNC_UL front, the protection section composition of SYNC_UL back;
Said interference detector is used for power output difference Th
1
Th
1＝P
SYNC_UL-(P
1+P
2)；
In the formula, Th
1Be power difference, P
SYNC_ULBe the base station received signal power corresponding to the SYNC_UL among the subframe UpPTS in the detection window, P
1Be the base station received signal power corresponding to the protection section of the SYNC_UL front in the detection window, P
2Be base station received signal power corresponding to the protection section at the back of the SYNC_UL in the detection window;
Said threshold compataror is used for the power difference Th with said interference detector output
1Compare with predefined threshold value, if power difference Th
1Less than the threshold value of setting, then output alarm signal.
5. the interference detecting apparatus of TD-SCDMA system base-station ascending pilot channel according to claim 1 is characterized in that, the protection section of said SYNC_UL front is 1～96 chip, and the protection section of said SYNC_UL back is 1～32 chip.
6. the interference detecting apparatus of TD-SCDMA system base-station ascending pilot channel according to claim 1 is characterized in that, the protection section of said SYNC_UL front is 90 chips, and the protection section of said SYNC_UL back is 25 chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103218419A CN102457897A (en) | 2011-10-21 | 2011-10-21 | Method and device for detecting interference to uplink pilot channel of base station of time division-synchronization code division multiple access (TD-SCDMA) system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103218419A CN102457897A (en) | 2011-10-21 | 2011-10-21 | Method and device for detecting interference to uplink pilot channel of base station of time division-synchronization code division multiple access (TD-SCDMA) system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102457897A true CN102457897A (en) | 2012-05-16 |
Family
ID=46040424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103218419A Pending CN102457897A (en) | 2011-10-21 | 2011-10-21 | Method and device for detecting interference to uplink pilot channel of base station of time division-synchronization code division multiple access (TD-SCDMA) system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102457897A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105491583A (en) * | 2014-10-13 | 2016-04-13 | 中国移动通信集团公司 | Interference detection method, base station, network element equipment and interference detection system |
| CN108075846A (en) * | 2016-11-17 | 2018-05-25 | 中兴通讯股份有限公司 | A kind of base station interference detection method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006110774A2 (en) * | 2005-04-12 | 2006-10-19 | Motorola Inc. | Method and system for performing uplink synchronization |
| CN101242221A (en) * | 2008-03-12 | 2008-08-13 | 北京天碁科技有限公司 | A device and method for detecting interference in uplink pilot channel |
| CN101242222A (en) * | 2008-03-12 | 2008-08-13 | 北京天碁科技有限公司 | A device and method for detecting interference in uplink pilot channel |
| CN101242223A (en) * | 2008-03-12 | 2008-08-13 | 北京天碁科技有限公司 | A device and method for detecting interference in uplink pilot channel |
| CN102045738A (en) * | 2009-10-19 | 2011-05-04 | 中兴通讯股份有限公司 | Interference detection method and device thereof |
-
2011
- 2011-10-21 CN CN2011103218419A patent/CN102457897A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006110774A2 (en) * | 2005-04-12 | 2006-10-19 | Motorola Inc. | Method and system for performing uplink synchronization |
| CN101242221A (en) * | 2008-03-12 | 2008-08-13 | 北京天碁科技有限公司 | A device and method for detecting interference in uplink pilot channel |
| CN101242222A (en) * | 2008-03-12 | 2008-08-13 | 北京天碁科技有限公司 | A device and method for detecting interference in uplink pilot channel |
| CN101242223A (en) * | 2008-03-12 | 2008-08-13 | 北京天碁科技有限公司 | A device and method for detecting interference in uplink pilot channel |
| CN102045738A (en) * | 2009-10-19 | 2011-05-04 | 中兴通讯股份有限公司 | Interference detection method and device thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105491583A (en) * | 2014-10-13 | 2016-04-13 | 中国移动通信集团公司 | Interference detection method, base station, network element equipment and interference detection system |
| CN105491583B (en) * | 2014-10-13 | 2019-01-08 | 中国移动通信集团公司 | A kind of interference detection method, base station, network element device and Interference Detection system |
| CN108075846A (en) * | 2016-11-17 | 2018-05-25 | 中兴通讯股份有限公司 | A kind of base station interference detection method and device |
| CN108075846B (en) * | 2016-11-17 | 2021-06-18 | 中兴通讯股份有限公司 | Base station interference detection method and device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11540323B2 (en) | 2-step random access | |
| US9572123B2 (en) | Multiple time advance for radio access networks | |
| EP3840503A1 (en) | Time domain resource allocation method and access network device | |
| EP3697167A1 (en) | 2-step random access | |
| CN109644366B (en) | Communication method and base station | |
| CN107404749B (en) | Communication connection method and base station | |
| EP3127267B1 (en) | Power based frame timing synchronisation for a time-division duplexing network | |
| KR102201832B1 (en) | Coexistence on a shared communication medium | |
| CN1855767B (en) | Method for establishing cells with large radius in CDMA communication system synchronized by time division synchronizing codes | |
| CN101595760A (en) | Be operated in the FEEDBACK CONTROL in the TDD system in the fdd mode | |
| CN101242222B (en) | A device and method for detecting interference in uplink pilot channel | |
| CN101242223B (en) | A device and method for detecting interference in uplink pilot channel | |
| CN101242221B (en) | A device and method for detecting interference in uplink pilot channel | |
| CN106161305B (en) | A kind of method and apparatus reducing interference | |
| CN102457897A (en) | Method and device for detecting interference to uplink pilot channel of base station of time division-synchronization code division multiple access (TD-SCDMA) system | |
| CN104581984A (en) | Method of handling uplink transmission and related communication device | |
| CN1988407A (en) | Open ring power control method for base station and its physical random cut-in channel | |
| KR20200088828A (en) | Confirmation method of non-competitive random access resource Network device and terminal device | |
| CN113993142A (en) | Communication method and device | |
| CN112640517B (en) | Configuring measurement gap patterns | |
| KR20220120531A (en) | Framework for two-step random access channel procedure in wireless communications | |
| CN104811255A (en) | Antenna calibration method and device | |
| CN105871445B (en) | A kind of repeater control method and device | |
| CN118077245A (en) | Method, apparatus and computer storage medium for communication | |
| CN114465644A (en) | Interference avoidance method, device and 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 | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120516 |