CN103874120B - A kind of bypassing method, system and the equipment of ascending pilot channel interference - Google Patents
A kind of bypassing method, system and the equipment of ascending pilot channel interference Download PDFInfo
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Abstract
The invention discloses a kind of bypassing method of ascending pilot channel (UpPCH) interference, NodeB measures the interference level that the UpPCH of each sampled point in serving cell is subject to, and reports radio network controller (RNC)；RNC obtains the average interference level of all sampled points in acquisition time, when the average interference level exceedes pre-determined threshold, the up expectation power of notice node B (NodeB) adjustment serving cells；User equipment (UE) carries out uplink synchronous by up expectation power after adjustment, in uplink synchronous success, evades completion to UpPCH interference；The present invention also discloses the avoidance system and equipment of a kind of ascending pilot channel interference, by the solution of the present invention, when there is UpPCH interference, it is possible to increase UE transmission power, evade UpPCH interference.
Description
Technical Field
The invention relates to a channel interference avoidance technology, in particular to an uplink pilot channel (UpPCH) interference avoidance method, a system and equipment.
Background
For interference of the UpPCH, only the UpPCH shifting algorithm is adopted for avoiding at present. The basic principle of the uppchs algorithm is to move the UpPCH backward to an uplink time slot in a traffic channel to reduce interference in a system caused by a downlink pilot time slot (DwPTS) signal of a remote co-frequency cell falling into an UpPCH channel of a serving cell.
However, for strong interference in and outside the system, especially strong interference outside the system, all uplink timeslots of a serving cell in a Time Division (TD) system have strong interference, and moving an UpPCH channel backward to any position cannot reduce the interference, resulting in that a node b (nodeb) cannot receive the UpPCH, and the whole cell cannot perform random access or cannot be used as a target cell for handover; and, if the interference level of the serving cell is strong, according to the cell reselection principle, the sum of the signal code power (Qrxlevmeas) received by the User Equipment (UE) of the current serving cell (Rs) on the primary common Control Physical Channel (P-CCPCH) and the hysteresis parameter (Qhyst) of the serving cell is not less than the sum of the Qrxlevmeas of the neighboring cell (Rn) and the cell reselection offset value (Qoffset) of the neighboring cells，n) In the difference, the UE cannot initiate cell reselection and will always stay in the interfering cell.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method, a system, and a device for avoiding uplink pilot channel (UpPCH) interference, which can improve the transmission power of UE and avoid UpPCH interference.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a method for avoiding uplink pilot channel interference, which comprises the following steps:
measuring the interference level of UpPCH of each sampling point in a service cell by NodeB, and reporting to RNC;
the method comprises the steps that an RNC (radio network controller) acquires average interference levels of all sampling points in acquisition time, and when the average interference levels exceed a preset threshold, a NodeB is informed to adjust the uplink expected power of a serving cell;
and the UE performs uplink synchronization through the adjusted uplink expected power, and when the uplink synchronization is successful, the avoidance of the UpPCH interference is completed.
In the above scheme, the method further comprises: when the average interference level exceeds a preset threshold, informing the NodeB to adjust a cell reselection offset value from a service cell to an adjacent cell; and when the uplink synchronization of the UE fails, reselecting the inter-frequency adjacent cell or the inter-system adjacent cell in the system according to the adjusted cell reselection deviant from the serving cell to the adjacent cell and the cell reselection principle.
The invention provides a system for avoiding interference of an uplink pilot channel, which comprises: NodeB, RNC, UE; wherein,
NodeB, used for measuring the interference level received by UpPCH of each sampling point in the serving cell, and reporting to RNC; adjusting the uplink expected power of the serving cell according to the notification of the RNC;
the RNC is used for acquiring the average interference level of all sampling points in the acquisition time, and informing the NodeB to adjust the uplink expected power of the serving cell when the average interference level exceeds a preset threshold;
and the UE is used for carrying out uplink synchronization through the adjusted uplink expected power, and when the uplink synchronization is successful, the avoidance of the UpPCH interference is completed.
In the foregoing solution, the RNC includes: an average interference level obtaining module and a judging module; wherein,
the average interference level acquisition module is used for acquiring the average interference levels of all sampling points in the acquisition time;
and the judging module is used for informing the NodeB to adjust the uplink expected power of the service cell when the average interference level exceeds a preset threshold.
In the above scheme, the NodeB includes: a measurement reporting module and an adjusting module; wherein,
the measurement reporting module is used for measuring the interference level received by the UpPCH of each sampling point in the service cell and reporting the interference level to the RNC;
and the adjusting module is used for adjusting the uplink expected power of the service cell according to the notification of the RNC.
In the foregoing solution, the determining module is further configured to notify the NodeB to adjust a cell reselection offset value from the serving cell to the neighboring cell when the average interference level exceeds a preset threshold.
In the foregoing solution, the adjusting module is further configured to adjust a cell reselection offset value from a serving cell to an adjacent cell according to the notification of the RNC;
and the UE is also used for reselecting the inter-frequency adjacent cell or the inter-system adjacent cell in the system according to the adjusted cell reselection deviant from the serving cell to the adjacent cell and the cell reselection principle when the uplink synchronization fails.
The present invention provides an RNC, comprising: an average interference level obtaining module and a judging module; wherein,
the average interference level acquisition module is used for acquiring the average interference levels of all sampling points in the acquisition time;
and the judging module is used for informing the NodeB to adjust the uplink expected power of the service cell when the average interference level exceeds a preset threshold.
In the foregoing solution, the determining module is further configured to notify the NodeB to adjust a cell reselection offset value from the serving cell to the neighboring cell when the average interference level exceeds a preset threshold.
The invention provides a NodeB, which comprises: a measurement reporting module and an adjusting module; wherein,
the measurement reporting module is used for measuring the interference level received by the UpPCH of each sampling point in the service cell and reporting the interference level to the RNC;
and the adjusting module is used for adjusting the uplink expected power of the service cell according to the notification of the RNC.
The invention provides a method, a system and equipment for avoiding uplink pilot channel interference, wherein NodeB measures the interference level received by UpPCH of each sampling point in a service cell and reports the interference level to a Radio Network Controller (RNC); the method comprises the steps that an RNC (radio network controller) acquires average interference levels of all sampling points in acquisition time, and when the average interference levels exceed a preset threshold, a NodeB is informed to adjust the Uplink (UP) expected power of a service cell; the UE performs uplink synchronization through the adjusted uplink expected power, and when the uplink synchronization is successful, the avoidance of UpPCH interference is completed; therefore, when the UpPCH interference occurs, the transmitting power of the UE can be improved, and the UpPCH interference is avoided.
Drawings
Fig. 1 is a schematic flowchart of a method for avoiding uplink pilot channel interference according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an uplink pilot channel interference avoidance system according to an embodiment of the present invention.
Detailed Description
The basic idea of the invention is: measuring the interference level of UpPCH of each sampling point in a service cell by NodeB, and reporting to RNC; the method comprises the steps that an RNC (radio network controller) acquires average interference levels of all sampling points in acquisition time, and when the average interference levels exceed a preset threshold, a NodeB is informed to adjust the uplink expected power of a serving cell; and the UE performs uplink synchronization through the adjusted uplink expected power, and when the uplink synchronization is successful, the avoidance of the UpPCH interference is completed.
The invention is further described in detail below with reference to the figures and the specific embodiments.
The invention realizes a method for avoiding uplink pilot channel interference, as shown in figure 1, the method comprises the following steps:
step 101: measuring the interference level of UpPCH of each sampling point in a service cell by NodeB, and reporting to RNC;
specifically, the NodeB measures the interference level received by the UpPCH at each sampling point in the serving cell in a period of 1 second, and converts the unit of all interference levels into decibel-millivolt (dBm).
Step 102: the method comprises the steps that an RNC (radio network controller) acquires average interference levels of all sampling points in acquisition time, and when the average interference levels exceed a preset threshold, a NodeB is informed to adjust the uplink expected power of a serving cell;
the average interference level of all sampling points in the acquisition time acquired by the RNC is as follows: the RNC calculates the average value of interference levels received by UpPCH of each sampling point reported by the NodeB in the acquisition time in a sliding window mode to obtain the average interference level of all the sampling points;
the RNC calculates the average value of interference levels received by UpPCH of each sampling point reported by NodeB in the acquisition time in a sliding window mode as follows: calculating the average value of the interference levels of the 1 st to the 20 th sampling points according to the time stamps of the sampling points, and setting the average value as Qaverage1, pushing 5 sampling points backwards for time length, calculating the average value of interference levels of the 6 th to the 25 th sampling points, and setting the average value as Qaverage2, and so on, calculating the average value of the interference levels to the 60 th 60 × (T-20) to the 60 th 60 × T sampling points, and setting the average value as Qaverage(12T-3), the average interference level of all sampling points in the acquisition time is as follows:
the adjusting of the uplink desired power of the serving cell generally is to increase the uplink desired power of the serving cell;
the preset threshold can be expressed by Supiscp, when Q isaverageWhen the power is greater than Supiscp, the RNC informs the NodeB to adjust the uplink expected power of the service cell;
the informing NodeB to adjust the uplink expected power of the serving cell is: RNC triggers the message of updating system information, informs NodeB to adjust the up expected power of the service cell through IUB interface, NodeB re-issues the latest system information at uu interface, the system information carries the adjusted up expected receiving power of the service cell;
the method also comprises the following steps: and after the NodeB adjusts the uplink expected power of the serving cell according to the notification of the RNC, the NodeB transmits the adjusted uplink expected power to the UE in the serving cell through a system message 5.
Step 103: and the UE performs uplink synchronization through the adjusted uplink expected power, and when the uplink synchronization is successful, the avoidance of the UpPCH interference is completed.
The method further comprises the following steps: when the average interference level exceeds a preset threshold, the RNC informs the NodeB to adjust a cell reselection offset value from a service cell to an adjacent cell;
the RNC informs the NodeB to adjust the cell reselection offset value from the serving cell to the neighbor cell to be: RNC triggers the message of updating system information, and informs NodeB to adjust the cell reselection deviant from the service cell to the adjacent cell through IUB interface, and NodeB re-issues the latest system information at uu interface, wherein the system information carries the adjusted cell reselection deviant from the service cell to the adjacent cell;
further, when the uplink synchronization fails, the UE reselects an inter-frequency neighboring cell or an inter-system neighboring cell in the system according to the adjusted cell reselection offset value from the serving cell to the neighboring cell and the cell reselection principle;
further, after adjusting the cell reselection offset value from the serving cell to the neighboring cell according to the notification of the RNC, the NodeB sends the adjusted cell reselection offset value from the serving cell to the neighboring cell to the UE in the serving cell through a system message 11 on a primary common control channel (PCCPCH);
further, when Q is always available within a preset timeaverageIf yes, the RNC informs NodeB to restore corresponding parameters;
the respective parameters include: an uplink expected received power of the serving cell, and/or a cell reselection offset value of the serving cell to a neighbor cell.
In order to implement the above method, the present invention further provides an uplink pilot channel interference avoidance system, as shown in fig. 2, the system includes: NodeB 21, RNC22, UE 23; wherein,
the NodeB 21 is used for measuring the interference level received by the UpPCH of each sampling point in the service cell and reporting the interference level to the RNC 22; adjusting the uplink expected power of the serving cell according to the notification of the RNC 22;
the RNC22 is configured to obtain an average interference level of all sampling points in the acquisition time, and notify the NodeB 21 to adjust an uplink expected power of a serving cell when the average interference level exceeds a preset threshold;
the UE 23 is configured to perform uplink synchronization with the adjusted uplink desired power, and when the uplink synchronization is successful, avoid the UpPCH interference is completed;
the RNC22 includes: an average interference level obtaining module 221 and a judging module 222; wherein,
an average interference level obtaining module 221, configured to obtain an average interference level of all sampling points in the acquisition time;
a determining module 222, configured to notify the NodeB 21 to adjust an uplink expected power of a serving cell when the average interference level exceeds a preset threshold;
the average interference level obtaining module 221 is specifically configured to calculate an average value of interference levels received by the UpPCH of each sampling point reported by the NodeB 21 within the acquisition time in a sliding window manner, so as to obtain an average interference level of all sampling points;
the determining module 222 is further configured to notify the NodeB 21 to adjust a cell reselection offset value from the serving cell to the neighboring cell when the average interference level exceeds a preset threshold;
the NodeB 21 includes: a measurement reporting module 211 and an adjusting module 212; wherein,
a measurement reporting module 211, configured to measure an interference level received by the UpPCH of each sampling point in the serving cell, and report the interference level to the RNC 22;
an adjusting module 212, configured to adjust the uplink expected power of the serving cell according to the notification from the RNC 22;
the adjusting module 212 is further configured to adjust a cell reselection offset value from the serving cell to the neighboring cell according to the notification from the RNC 22;
the NodeB 21 further includes an issuing module 213, configured to, after the adjusting module 212 adjusts the uplink desired power of the serving cell according to the notification of the RNC22, issue the adjusted uplink desired power to the UE 23 in the serving cell through the system message 5;
the issuing module 213 is further configured to, after the adjusting module adjusts the cell reselection offset value from the serving cell to the neighboring cell according to the notification of the RNC22, issue the adjusted cell reselection offset value from the serving cell to the neighboring cell to the UE 23 in the serving cell through the system message 11 on the primary common control channel;
the UE 23 is further configured to reselect an inter-frequency neighboring cell or an inter-system neighboring cell in the system according to the adjusted cell reselection offset value from the serving cell to the neighboring cell and the cell reselection principle when the uplink synchronization fails.
Based on the above system, the present invention further provides an RNC, as shown in fig. 2, where the RNC22 includes: an average interference level obtaining module 221 and a judging module 222; wherein,
an average interference level obtaining module 221, configured to obtain an average interference level of all sampling points in the acquisition time;
a determining module 222, configured to notify the NodeB 21 to adjust an uplink expected power of a serving cell when the average interference level exceeds a preset threshold;
the average interference level obtaining module 221 is specifically configured to calculate an average value of interference levels received by the UpPCH of each sampling point reported by the NodeB 21 within the acquisition time in a sliding window manner, so as to obtain an average interference level of all sampling points;
the determining module 222 is further configured to notify the NodeB 21 to adjust a cell reselection offset value from the serving cell to the neighboring cell when the average interference level exceeds a preset threshold.
The present invention also provides a NodeB, as shown in fig. 2, where the NodeB 21 includes: a measurement reporting module 211 and an adjusting module 212; wherein,
a measurement reporting module 211, configured to measure an interference level received by the UpPCH of each sampling point in the serving cell, and report the interference level to the RNC 22;
an adjusting module 212, configured to adjust the uplink expected power of the serving cell according to the notification from the RNC 22;
the adjusting module 212 is further configured to adjust a cell reselection offset value from the serving cell to the neighboring cell according to the notification from the RNC 22;
the NodeB 21 further includes an issuing module 213, configured to, after the adjusting module 212 adjusts the uplink desired power of the serving cell according to the notification of the RNC22, issue the adjusted uplink desired power to the UE 23 in the serving cell through the system message 5;
the issuing module 213 is further configured to, after the adjusting module adjusts the cell reselection offset value from the serving cell to the neighboring cell according to the notification of the RNC22, issue the adjusted cell reselection offset value from the serving cell to the neighboring cell to the UE 23 in the serving cell through the system message 11 on the primary common control channel.
In summary, the scheme of the present invention preferentially adopts a manner of adjusting the uplink desired power of the serving cell, so as to improve the transmission power of the UE, and when the UE performs uplink synchronization with the adjusted uplink desired power and succeeds, the UE avoids the UpPCH interference; secondly, a mode of adjusting a cell reselection deviant from a serving cell to an adjacent cell is adopted, when uplink synchronization fails, UE reselects an inter-frequency adjacent cell or an inter-system adjacent cell in a system according to the adjusted cell reselection deviant from the serving cell to the adjacent cell and a cell reselection principle, and the UpPCH interference avoidance is completed.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (7)
1. An avoiding method for uplink pilot channel interference is characterized in that the method comprises the following steps:
a node B NodeB measures the interference level received by an uplink pilot channel UpPCH of each sampling point in a service cell and reports the interference level to a radio network controller RNC;
the method comprises the steps that an RNC (radio network controller) acquires average interference levels of all sampling points in acquisition time, and when the average interference levels exceed a preset threshold, a NodeB is informed to adjust the uplink expected power of a serving cell;
the user equipment UE performs uplink synchronization through the adjusted uplink expected power, and when the uplink synchronization is successful, the avoidance of UpPCH interference is completed;
when the average interference level exceeds a preset threshold, informing a NodeB to adjust a cell reselection offset value from a serving cell to an adjacent cell; and when the uplink synchronization of the UE fails, reselecting the inter-frequency adjacent cell or the inter-system adjacent cell in the system according to the adjusted cell reselection deviant from the serving cell to the adjacent cell and the cell reselection principle.
2. An interference avoidance system for an uplink pilot channel, the system comprising: NodeB, RNC, UE; wherein,
NodeB, used for measuring the interference level received by UpPCH of each sampling point in the serving cell, and reporting to RNC; adjusting the uplink expected power of the serving cell according to the notification of the RNC; the RNC is also used for adjusting the cell reselection offset value from the serving cell to the adjacent cell according to the notification of the RNC;
the RNC is used for acquiring the average interference level of all sampling points in the acquisition time, and informing the NodeB to adjust the uplink expected power of the serving cell when the average interference level exceeds a preset threshold;
the UE is used for carrying out uplink synchronization through the adjusted uplink expected power, and when the uplink synchronization is successful, the avoidance of UpPCH interference is completed; and when the uplink synchronization fails, reselecting the inter-frequency neighboring cell or the inter-system neighboring cell in the system according to the adjusted cell reselection deviant from the serving cell to the neighboring cell and the cell reselection principle.
3. The avoidance system according to claim 2, wherein the RNC comprises: an average interference level obtaining module and a judging module; wherein,
the average interference level acquisition module is used for acquiring the average interference levels of all sampling points in the acquisition time;
and the judging module is used for informing the NodeB to adjust the uplink expected power of the service cell when the average interference level exceeds a preset threshold.
4. The avoidance system according to claim 3, wherein the NodeB includes: a measurement reporting module and an adjusting module; wherein,
the measurement reporting module is used for measuring the interference level received by the UpPCH of each sampling point in the service cell and reporting the interference level to the RNC;
and the adjusting module is used for adjusting the uplink expected power of the service cell according to the notification of the RNC.
5. The evasion system of claim 4, wherein the determining module is further configured to notify a NodeB to adjust a cell reselection offset value of a serving cell to a neighboring cell when the average interference level exceeds a preset threshold.
6. The avoidance system of claim 4, wherein the adjusting module is further configured to adjust a cell reselection offset value from a serving cell to a neighboring cell according to the notification from the RNC.
7. A UE, wherein the UE is configured to: the method comprises the steps that NodeB measures the interference level received by an uplink pilot channel UpPCH of each sampling point in a service cell, the interference level is reported to a radio network controller RNC, the RNC acquires the average interference level of all sampling points in the acquisition time, when the average interference level exceeds a preset threshold, the NodeB is informed to adjust a cell reselection offset value from the service cell to an adjacent cell and adjust the uplink expected power of the service cell, the UE performs uplink synchronization through the adjusted uplink expected power, and when the uplink synchronization is successful, the avoidance of UpPCH interference is completed; and when the uplink synchronization of the UE fails, reselecting the inter-frequency adjacent cell or the inter-system adjacent cell in the system according to the adjusted cell reselection deviant from the serving cell to the adjacent cell and the cell reselection principle.
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| US8654728B2 (en) * | 2011-04-29 | 2014-02-18 | Telefonaktiebolaget L M Ericsson (Publ) | Generating uplink signals from user equipment nodes to identify interferers to a network node |
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| CN1395375A (en) * | 2001-06-28 | 2003-02-05 | 西门子信息通讯网络公司 | Method of down-chain power control in packet switching cellular system |
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