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CN102316463B - Carrier frequency regulation method and system - Google Patents

Carrier frequency regulation method and system Download PDF

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Publication number
CN102316463B
CN102316463B CN201010226352.0A CN201010226352A CN102316463B CN 102316463 B CN102316463 B CN 102316463B CN 201010226352 A CN201010226352 A CN 201010226352A CN 102316463 B CN102316463 B CN 102316463B
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current
penalty
value
carrier frequency
penalty value
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CN102316463A (en
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孟浩
张爽
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Priority to CN201010226352.0A priority Critical patent/CN102316463B/en
Priority to PCT/CN2011/076871 priority patent/WO2012003795A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/324—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a carrier frequency regulation method and system, wherein the method specifically comprises the steps of: configuring parameters of a punishment timer, wherein the parameters comprise a punishment duration and a punishment initial value; starting the punishment timer; before the punishment timer times over, judging UE (User Equipment) is transregional according to a current punishment value of a UE source region and a pilot frequency value reported by the current UE, if yes, triggering the regulation from the carrier frequency of the UE source region to the carrier frequency of a UE target region, updating the current punishment value of the UE target region, wherein initial values of the UE source region punishment value and the UE target region punishment value are equal to the punishment initial value. The carrier frequency regulation method and system are used for better controlling carrier frequency regulation, therefore, dropped call rate is reduced and user experience is improved.

Description

Carrier frequency adjusting method and system
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a method and a system for adjusting carrier frequency.
Background
For TD-SCDMA (Time Division-synchronous code Division Multiple Access) systems, the radio band resource owned by the TD-SCDMA system is usually divided into several carrier frequencies, and these carrier frequencies carry common channels and/or dedicated channels. And an RNC (Radio Network Controller) in the TD-SCDMA system is responsible for allocating channels for these carrier frequencies, wherein each channel has a corresponding frequency point.
FODCA (Frequency optimized dynamic channel Allocation) is a typical channel Allocation method that divides a cell into an interference band and a non-interference band; for a UE (User Equipment), preferentially using a configured optimal frequency point in an interference band, and not using the optimal frequency point as much as possible in a non-interference band; because the main frequency points of the N frequency point cells are basically different in frequency during network planning, the same frequency interference can be avoided as much as possible in an interference zone.
Referring to fig. 1, an implementation of the existing FODCA may specifically include:
step 101, judging whether the UE is across areas or not through a pilot frequency value reported by the current UE, and if so, triggering carrier frequency adjustment of the UE;
for the current UE, after accessing the cell network, the UE enters the interference band from the non-interference band, or enters the non-interference band from the interference band, both of which can be considered as a cross-region.
In the prior art, step 101 mainly uses an RSCP (received signal code Power) value to represent the pilot value, and the method for determining the cross-region is as follows:
if the area information of the current UE in the RNC indicates that the current UE is in a non-interference zone, if the adjacent cells of the cell in which the current UE is located all meet the following conditions:
PCCPCH_RSCPS-PCCPCH_RSCPAdji≥Th-ALPHA……①
and indicating that the UE is still in a non-interference band, otherwise, indicating that the UE is in an interference band, wherein PCCPCH _ RSCP is the RSCP value of the cell where the current UE is located, and PCCPCH _ RSCP _ Dji is the RSCP value of a certain adjacent cell of the cell where the current UE is located, wherein Th is 3-6 dB, and ALPHA is 0-3 dB.
Or, if the area information of the current UE in the RNC indicates that the current UE is in the "interference zone", if any one of the neighboring cells of the cell where the current UE is located satisfies the following condition:
PCCPCH_RSCPS-PCCPCH_RSCPAdji＜Th+ALPHA……②
the UE is still in the "interference band", otherwise, it is in the "non-interference band".
For example, assume that the current UE's original area information is: in a non-interference band, the original carrier frequency does not use the optimal frequency point, and a certain adjacent cell of the cell where the current UE is located does not satisfy formula (i), which indicates that the new area information of the current UE is: in the "interference band", and the new area information requires the use of the best frequency point; therefore, when the current UE enters the interference band from the non-interference band, the adjustment of the original carrier frequency needs to be triggered.
Similarly, when the current UE enters a non-interference band from an interference band, carrier frequency adjustment also needs to be triggered.
And 102, after the carrier frequency adjustment is finished, starting an FDCA algorithm timer to prevent frequent carrier frequency adjustment.
That is, the carrier frequency adjustment operation in step 101 is not performed for the current UE until the FDCA (Fast Dynamic Channel Allocation) timer expires.
The existing FODCA implementation scheme mainly has the following defects:
1. judging whether the UE is across the region only by using the pilot frequency value, and further triggering the UE to be frequently adjusted in different frequency points when the UE is across the region; according to the test of an external field, even if the UE does not move in a cell, the reported pilot frequency value has jitter of several dB, and according to the formula I and the formula II, the UE is caused to be frequently adjusted between a non-interference band and an interference band as long as the pilot frequency value has jitter of more than 6dB according to the size of ALPHA configuration, so that the UE is caused to be frequently adjusted in different frequency points, and the frequent adjustment can increase the call drop rate on one hand and influence the service quality of users in an adjacent cell on the other hand;
2. the FDCA algorithm timer controls the times of carrier frequency adjustment only by setting the time length of the timer: it is possible that the necessary carrier frequency adjustment is prevented when the timer duration is set too long.
In summary, one of the technical problems that needs to be urgently solved by those skilled in the art is: how the carrier frequency adjustment can be better controlled.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a carrier frequency adjustment method and a carrier frequency adjustment system, which are used for better controlling carrier frequency adjustment, thereby reducing call drop rate and improving user experience.
In order to solve the above problems, the present invention discloses a carrier frequency adjustment method, which comprises:
configuring parameters of a penalty timer, wherein the parameters comprise a penalty duration and a penalty value initial value;
starting a penalty timer;
before the penalty timer is overtime, judging whether the UE is over the area according to the current penalty value of the UE source area and the pilot frequency value reported by the current UE, if so, triggering the adjustment from the UE source area carrier frequency to the UE target area carrier frequency, and updating the current penalty value of the UE target area; the initial values of the UE source area penalty value and the UE target area penalty value are equal to the initial values of the penalty values;
the parameters further include a penalty step size;
the step of updating the current penalty value of the UE target area comprises the step of updating the current penalty value of the UE target area according to the penalty step length;
the step of judging whether the UE crosses the region or not according to the current penalty value of the source region of the UE and the pilot frequency value reported by the current UE comprises the following steps:
when the source area of the UE is a non-interference area of the UE, if any adjacent area of the current cell where the UE is located does not meet the following conditions:
PCCPCH_RSCPS+penalty1-PCCPCH_RSCPAdji≥Th-ALPHA
judging the cross-region of the current UE, triggering the adjustment from the non-interference band carrier frequency of the UE to the interference band carrier frequency of the UE, and updating the current penalty value of the interference band of the UE;
wherein, PCCPCH _ RSCPSThe RSCP value of the cell where the current UE is located, the penalty1 is the current penalty value of the UE non-interference band, PCCPCH _ RSCPAdjiPresetting a parameter Th to be 3-6 dB and a parameter ALPHA to be 0-3 dB for the RSCP value of any adjacent region of the cell where the current UE is located;
or,
when the source area of the UE is the UE interference area, if all the adjacent areas of the current cell where the UE is located do not meet the following conditions:
PCCPCH_RSCPS-penalty2-PCCPCH_RSCPAdji＜Th+ALPHA
judging the cross-region of the current UE, triggering the adjustment from the interference band carrier frequency of the UE to the non-interference band carrier frequency of the UE, and updating the current penalty value of the non-interference band of the UE; where penalty2 is the current penalty value of the UE interference band.
Preferably, the parameters further include a penalty value maximum;
the step of judging whether the UE crosses the region according to the current penalty value of the source region of the UE and the pilot frequency value reported by the current UE further comprises the following steps:
after the updating is finished, if the current penalty value of the UE target area is larger than the maximum penalty value, the current penalty value of the UE target area is adjusted to be the maximum penalty value.
Preferably, the method further comprises:
after the penalty timer is overtime, if the adjustment from the UE source area carrier frequency to the UE target area carrier frequency is detected, the step of starting the penalty timer is continuously executed after the adjustment is finished.
Preferably, the method further comprises:
and closing the penalty timer after the UE adjusts the current cell.
On the other hand, the invention also discloses a carrier frequency adjusting system, which comprises:
the configuration module is used for configuring parameters of the penalty timer, and the parameters comprise penalty duration and a penalty value initial value;
the starting module is used for starting a penalty timer;
the judging module is used for judging whether the UE spans the area or not according to the current penalty value of the UE source area and the pilot frequency value reported by the current UE before the penalty timer is overtime, wherein the initial value of the UE source area penalty value is equal to the initial value of the penalty value;
the triggering module is used for triggering the adjustment from the source region carrier frequency of the UE to the target region carrier frequency of the UE when the current UE is in a cross-region state;
the updating module is used for updating the current penalty value of the UE target area; wherein an initial value of a UE target area penalty value is equal to the initial value of the penalty value;
the updating module is specifically configured to update a current penalty value of the UE target area according to a preset penalty step.
Preferably, the judging module includes:
a first determining unit, configured to, when the source region of the UE is a UE non-interference band, if any neighboring cell of a cell where the current UE is located does not satisfy the following condition:
PCCPCH_RSCPS+penalty1-PCCPCH_RSCPAdji≥Th-ALPHA
judging the current UE trans-regional;
wherein, PCCPCH _ RSCPSThe RSCP value of the cell where the current UE is located, the penalty1 is the current penalty value of the UE non-interference band, PCCPCH _ RSCPAdjiPresetting a parameter Th to be 3-6 dB and a parameter ALPHA to be 0-3 dB for the RSCP value of any adjacent region of the cell where the current UE is located;
or,
a second determining unit, configured to, when the source region of the UE is the UE interference band, if all neighboring cells of the cell where the current UE is located do not satisfy the following condition:
PCCPCH_RSCPS-penalty2-PCCPCH_RSCPAdji≥Th+ALPHA
judging the current UE trans-regional; where penalty2 is the current penalty value of the UE interference band.
The trigger module includes:
the first trigger unit is used for triggering the adjustment from the UE non-interference band carrier frequency to the UE interference band carrier frequency; or,
the second trigger unit is used for triggering the adjustment from the UE interference band carrier frequency to the UE non-interference band carrier frequency; and updating the current penalty value of the UE non-interference band
The update module includes:
a first updating unit, configured to update a current penalty value of the UE interference band; or,
and the second updating unit is used for updating the current penalty value of the UE non-interference band.
Preferably, the parameters further include a penalty value maximum;
the system further comprises:
and the penalty value adjusting module is used for adjusting the current penalty value of the UE target area to be the maximum penalty value if the current penalty value of the UE target area is larger than the maximum penalty value after the updating is finished.
Preferably, the system further comprises:
and the detection module is used for informing the starting module to start the penalty timer after the adjustment is finished if the adjustment from the source region carrier frequency of the UE to the target region carrier frequency of the UE is detected after the penalty timer is overtime.
Preferably, the system further comprises:
and a closing module, configured to close the penalty timer after the UE adjusts the current cell.
Compared with the prior art, the invention has the following advantages:
the invention can properly adjust the strategy of the punishment timer to achieve the aim of controlling the carrier frequency adjustment.
When the pilot frequency value of the current cell where the UE is located has jitter with amplitude larger than 6dB for a plurality of times in a short time, the invention can finally stop carrier frequency adjustment by continuously updating the penalty value parameter and limit the frequent adjustment of the UE in different frequency points, thereby reducing the call drop rate and improving the user experience.
When the pilot value of the current cell where the UE is located is greatly deteriorated (for example, 12dB), the present invention may also adjust the current penalty value of the target area of the UE not to be too large, so that the carrier frequency adjustment may still be performed, and thus, the present invention may not prevent the necessary carrier frequency adjustment, thereby preventing the occurrence of call drop to a great extent.
Drawings
FIG. 1 is a prior art implementation of FODCA;
fig. 2 is a flowchart of a carrier frequency adjustment method 1 according to an embodiment of the present invention;
fig. 3 is a flowchart of a carrier frequency adjustment method according to embodiment 2 of the present invention;
FIG. 4 is an exemplary application of the penalty timer of the present invention in carrier frequency adjustment;
fig. 5 is a structural diagram of a carrier frequency adjustment system according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 2, a flowchart of embodiment 1 of a carrier frequency adjustment method of the present invention is shown, which may specifically include:
step 201, configuring parameters of a penalty timer, wherein the parameters may include a penalty duration and a penalty initial value;
step 202, starting a penalty timer;
step 203, before the penalty timer is overtime, judging whether the UE is over the area according to the current penalty value of the UE source area and the pilot frequency value reported by the current UE, if so, triggering the adjustment from the UE source area carrier frequency to the UE target area carrier frequency, and updating the current penalty value of the UE target area; wherein the initial values of the UE source area penalty value and the UE target area penalty value are equal to the initial values of the penalty values.
The invention introduces the concept of punishment timer, so that the carrier frequency adjustment is not only dependent on the pilot frequency value reported by the user; therefore, when the pilot frequency value of the current cell where the UE is located has a plurality of jitters with amplitude larger than 6dB in a short time, the strategy of the punishment timer can be properly adjusted so as to limit the frequent adjustment of the UE in different frequency points; for example, the policy may be: finally stopping carrier frequency adjustment by continuously updating the penalty value parameters and limiting the times of carrier frequency adjustment, thereby reducing the call drop rate and improving the user experience.
Or, even if the penalty timer is not overtime, if the pilot value of the current cell where the UE is located is greatly deteriorated (for example, 12dB), the carrier frequency adjustment can still be performed, and thus, the necessary carrier frequency adjustment is not prevented by the present invention, thereby largely preventing the occurrence of call drop.
Referring to fig. 3, a flowchart of embodiment 2 of a carrier frequency adjustment method according to the present invention is shown, which may specifically include:
step 301, configuring a penalty timer parameter, wherein the parameter may include a penalty duration and a penalty value initial value;
step 302, starting a penalty timer;
the present invention can be applied to various mobile communication systems that report RSCP values and can use the FODCA algorithm, such as TD-SCDMA systems, WCDMA (Wideband code division Multiple Access) systems, etc., and the following description will be given only by taking TD-SCDMA systems as an example, and other mobile communication systems please refer to it.
In TD-SCDMA, the RNC typically makes the FODCA policy for a cell according to FO (Frequency optimization) measurement reports reported by UEs in the cell.
For example, the RNC may consider utilizing a penalty timer in the FODCA policy if the RNC observes the own cell PCCPCH RSCP value in the FO measurement report and finds that the PCCPCH RSCP value has jitter of greater than 6dB in magnitude for a short period of time.
Regarding the opportunity for starting the penalty timer, the opportunity is generally after the carrier frequency adjustment of the UE is completed; that is, after the RNC successfully receives the reconfiguration complete replied by the UE, the penalty timer is started.
Step 303, before the penalty timer is overtime, if the UE source area is a UE non-interference zone, judging whether the UE crosses the area according to a current penalty value of the UE non-interference zone and a pilot frequency value reported by the current UE, if so, triggering an adjustment from the UE non-interference zone carrier frequency to the UE interference zone carrier frequency, and updating the current penalty value of the UE interference zone, where initial values of the UE source area penalty value and the UE target area penalty value are equal to initial values of the penalty values;
according to the carrier frequency adjustment direction, the carrier frequency adjustment of the present invention can be divided into two types: the adjustment from the UE non-interfering band carrier frequency to the UE interfering band carrier frequency, and the adjustment from the UE interfering band carrier frequency to the UE non-interfering band carrier frequency are explained in step 303 and step 304, respectively.
In practice, according to the current penalty value of the non-interference band of the UE and the pilot value reported by the current UE, if any neighboring cell of the cell where the current UE is located does not satisfy the following condition:
PCCPCH_RSCPS+penalty1-PCCPCH_RSCPAdji≥Th-ALPHA ③
judging the current UE trans-regional;
wherein, PCCPCH _ RSCPSThe RSCP value of the cell where the current UE is located, the penalty1 is the current penalty value of the UE non-interference band, PCCPCH _ RSCPAdjiThe preset parameter Th is 3-6 dB, and the preset parameter ALPHA is 0-3 dB for the RSCP value of any adjacent region of the cell where the current UE is located.
And step 304, before the penalty timer is overtime, if the UE source area is the UE interference zone, judging whether the UE crosses the zone according to the current penalty value of the UE interference zone and the pilot frequency value reported by the current UE, if so, triggering the adjustment from the UE interference zone carrier frequency to the UE non-interference zone carrier frequency, and updating the current penalty value of the UE non-interference zone.
In practice, according to the current penalty value of the UE interference band and the pilot frequency value reported by the current UE, if all neighboring cells of the cell in which the current UE is located do not satisfy the following condition:
PCCPCH_RSCPS-penalty2-PCCPCH_RSCPAdji＜Th+ALPHA ④
the current UE spans the area;
where penalty2 is the current penalty value of the UE interference band.
In order to achieve the purpose of limiting the frequency of carrier frequency adjustment, after the carrier frequency adjustment is triggered, the invention can carry out the updating operation of penalty value.
Taking the step 303 as an example, after the current adjustment, the direction of the next adjustment is adjustment from the UE interference band carrier frequency to the UE non-interference band carrier frequency, that is, the current penalty value of the UE interference band is needed to perform the judgment of carrier frequency adjustment, so the current penalty value of the UE interference band is selected as the object of the update operation.
Assuming that penalty2 is the current penalty value of the UE interference band, in practice, the updating operation of the current penalty value of the UE interference band may be that, by continuously increasing penalty2, all neighboring cells of the cell where the current UE is located gradually satisfy the formula (iv), and finally, the current UE no longer has the conditions of cross-region and carrier frequency adjustment.
In a particular implementation, another parameter of the penalty timer may be preconfigured: punishing the step length; in this way, the updating operation may be to update the current penalty value of the UE target area according to the penalty step.
For example, the update operation of step 303 may be, penalty2 ═ penalty2+ penalty step; the update operation of step 304 may be penalty1 ═ penalty1+ penalty step;
wherein, pendyttep is a penalty step.
In addition, to avoid the situation that the penalty value is too large, which results in preventing the necessary carrier frequency adjustment, in a preferred embodiment of the present invention, another parameter of the penalty timer may be set: maximum value of penalty value;
thus, after each update operation is completed, the following adjustment steps may also be performed:
after the updating is finished, if the current penalty value of the UE target area is larger than the maximum penalty value, the current penalty value of the UE target area is adjusted to be the maximum penalty value.
Because the current punishment value of the UE target area is not overlarge through adjustment, when the carrier frequency adjustment is judged to be triggered, if the pilot frequency value of the current cell where the UE is located is greatly deteriorated (for example, 12dB), the carrier frequency adjustment can still be carried out, so that the necessary carrier frequency adjustment cannot be prevented by the method, and the call drop is prevented to a great extent.
Since the FODCA policy is formulated for a cell, it can be understood that after the UE adjusts the current cell, the RNC may close the penalty timer, and then adopt a new FODCA policy to adapt to a new environment (new cell) where the UE is located.
Furthermore, after the penalty timer is overtime, if the user does not leave the current cell, the RNC can continue to utilize the penalty timer in the FODCA policy; for example, once the adjustment from the UE source area carrier frequency to the UE target area carrier frequency is detected, the step of starting the penalty timer is continuously executed after the adjustment is completed; the invention does not impose restrictions on the specific start opportunities of the penalty timers.
In order to make the present invention better understood by those skilled in the art, the application of the penalty timer in carrier frequency adjustment is described below by way of example.
The example involves configuring penalty timer duration to be 10s, penalty initial value to be 2, penalty maximum value to be 5, penalty step size to be 1, Th to be 4, ALPHA to be 3; assuming that the penalty timer is not timed out, referring to fig. 4, the method may specifically include:
step 401, starting a penalty timer;
the initial value of the UE non-interference band penalty value, penalty1, is 2 and the initial value of the UE interference band penalty value, penalty2, is 2.
Step 402, the UE source area is a UE interference band, and if all neighboring cells of the current UE cell do not satisfy formula (r) according to reported PCCPCH _ RSCPs (50), PCCPCH _ RSCPAdj1(40), and penalty2, adjustment from the UE interference band carrier frequency to the UE non-interference band carrier frequency is triggered, and the penalty1 is updated to penalty1+1 to 3;
step 403, the UE source area is a UE non-interference band, and if it is known that a certain neighboring cell of the current UE cell does not satisfy the formula (c) according to the reported PCCPCH _ RSCPs (50), PCCPCH _ RSCPAdj1(55), and duty 1, adjustment from the UE non-interference band carrier frequency to the UE interference band carrier frequency is triggered, and duty 2 is updated to duty 2+1 to 3;
step 404, the UE source area is a UE interference band, and if all neighboring cells of the current UE cell do not satisfy formula (r) according to reported PCCPCH _ RSCPs (50), PCCPCH _ RSCPAdj1(40), and penalty2, adjustment from the UE interference band carrier frequency to the UE non-interference band carrier frequency is triggered, and the penalty1 is updated to penalty1+1 to 4;
step 405, the UE source region is a UE non-interference band, and if it is known that a certain neighboring cell of the current UE cell does not satisfy the formula (c) according to the reported PCCPCH _ RSCPs (50), PCCPCH _ RSCPAdj1(55), and duty 1, adjustment from the UE non-interference band carrier frequency to the UE interference band carrier frequency is triggered, and duty 2 is updated to duty 2+1 to 4;
step 406, if the source region of the UE is a UE interference band, and it is known that a certain neighboring cell of the cell where the current UE is located satisfies the formula (iv) according to the reported PCCPCH _ RSCPs (50), PCCPCH _ RSCPAdj1(40), and duty 2, carrier frequency adjustment is not triggered;
step 407, detecting that the UE adjusts the current cell, and closing the penalty timer.
It can be understood that, in addition to the current UE adjusting out of the current cell, a person skilled in the art may also turn off the penalty timer at other occasions according to the actual needs of the FODCA, and the specific turn-off time of the penalty timer is not limited by the present invention.
Corresponding to the foregoing method embodiment, the present invention further discloses a carrier frequency adjustment system embodiment, and referring to fig. 5, the method specifically includes:
a configuration module 501, configured to configure a penalty timer parameter, where the parameter includes a penalty duration and a penalty initial value;
a starting module 502 for starting a penalty timer;
a determining module 503, configured to determine, before the penalty timer expires, whether the UE crosses the region according to a current penalty value of the UE source region and a pilot value reported by the current UE, where an initial value of the UE source region penalty value is equal to an initial value of the penalty value;
a triggering module 504, configured to trigger adjustment from a source region carrier frequency of the UE to a target region carrier frequency of the UE when the current UE crosses a region;
an updating module 505, configured to update a current penalty value of the UE target area; wherein an initial value of a UE target area penalty value is equal to the initial value of the penalty value.
According to the carrier frequency adjustment direction, the carrier frequency adjustment of the present invention can be divided into two types: adjustment from the UE non-interfering band carrier frequency to the UE interfering band carrier frequency, and adjustment from the UE interfering band carrier frequency to the UE non-interfering band carrier frequency.
For the above two carrier frequency adjustments, the determining module 503, the triggering module 504, and the updating module 505 may be designed as follows:
A) specifically, in the determination module 503, it is designed that:
a first judging unit a1, configured to, when the source region of the UE is a UE non-interference band, judge whether the UE crosses the region according to a current penalty value of the UE non-interference band and a pilot value reported by the current UE; or,
in a specific implementation, the first determining unit a1 may be specifically configured to, when any neighboring cell of a cell where a current UE is located does not satisfy the following condition:
PCCPCH_RSCPS+penalty1-PCCPCH_RSCPAdji≥Th-ALPHA
judging the current UE trans-regional;
wherein, PCCPCH _ RSCPSThe RSCP value of the cell where the current UE is located, the penalty1 is the current penalty value of the UE non-interference band, PCCPCH _ RSCPAdjiThe preset parameter Th is 3-6 dB, and the preset parameter ALPHA is 0-3 dB for the RSCP value of any adjacent region of the cell where the current UE is located.
A second determining unit a2, configured to, when the UE source area is a UE interference band, determine whether the UE crosses the area according to a current penalty value of the UE interference band and a pilot value reported by the current UE;
for example, the second determining unit a2 may be specifically configured to, when all neighboring cells of the cell where the current UE is located do not satisfy the following condition:
PCCPCH_RSCPS-penalty2-PCCPCH_RSCPAdji≥Th+ALPHA
judging the current UE trans-regional;
where penalty2 is the current penalty value of the UE interference band.
B) The triggering module 504 may include:
a first triggering unit B1, configured to trigger an adjustment from a UE non-interference band carrier frequency to a UE interference band carrier frequency; or,
a second triggering unit B2, configured to trigger an adjustment from the UE interference band carrier frequency to the UE non-interference band carrier frequency; and updating the current penalty value of the UE non-interference band
C) The following units are provided in the update module 505:
a first updating unit C1, configured to update a current penalty value of the UE interference band; or,
a second updating unit C2 for updating the current penalty value of the UE non-interference band.
In practice, the fitting of the above unit structures may include: corresponding to the adjustment from the UE non-interference band carrier frequency to the UE interference band carrier frequency, the first judging unit A1, the first triggering unit B1 and the first updating unit C1 work in cooperation; or, corresponding to the adjustment from the UE interference band carrier frequency to the UE non-interference band carrier frequency, the second determining unit a2, the second triggering unit B2, and the second updating unit C2 work together;
in a particular implementation, another parameter of the penalty timer may be preconfigured: punishing the step length; in this way, the updating module 505 may be specifically configured to update the current penalty value of the UE target area according to the preset penalty step.
In addition, to avoid the situation that the penalty value is too large, which results in preventing the necessary carrier frequency adjustment, in a preferred embodiment of the present invention, another parameter of the penalty timer may be set: maximum value of penalty value;
as such, the system may further include:
and the penalty value adjusting module is used for adjusting the current penalty value of the UE target area to be the maximum penalty value if the current penalty value of the UE target area is larger than the maximum penalty value after the updating is finished.
Furthermore, since the FODCA policy is formulated for a cell, it can be understood that a shutdown module may be further designed in the system, and the shutdown module may be configured to shut down the penalty timer after the UE adjusts to the current cell.
Furthermore, after the penalty timer is overtime, if the user does not leave the current cell, the RNC can continue to utilize the penalty timer in the FODCA policy; therefore, a detection module may be designed in the system, and may be configured to, after the penalty timer expires, notify the starting module to start the penalty timer after the adjustment is completed if the adjustment from the UE source area carrier frequency to the UE target area carrier frequency is detected.
For the system embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The method and system for adjusting carrier frequency provided by the present invention are introduced in detail, and the principle and the implementation of the present invention are explained by applying specific examples, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (8)

1. A method for adjusting a carrier frequency, comprising:
configuring parameters of a penalty timer, wherein the parameters comprise a penalty duration and a penalty value initial value;
starting a penalty timer;
before the penalty timer is overtime, judging whether the UE is over the area according to the current penalty value of the UE source area and the pilot frequency value reported by the current UE, if so, triggering the adjustment from the UE source area carrier frequency to the UE target area carrier frequency, and updating the current penalty value of the UE target area; the initial values of the UE source area penalty value and the UE target area penalty value are equal to the initial values of the penalty values;
the parameters further include a penalty step size;
the step of updating the current penalty value of the UE target area comprises the step of updating the current penalty value of the UE target area according to the penalty step length;
the step of judging whether the UE crosses the region or not according to the current penalty value of the source region of the UE and the pilot frequency value reported by the current UE comprises the following steps:
when the source area of the UE is a non-interference area of the UE, if any adjacent area of the current cell where the UE is located does not meet the following conditions:
PCCPCH_RSCPS+penalty1-PCCPCH_RSCPAdji≥Th-ALPHA
judging the cross-region of the current UE, triggering the adjustment from the non-interference band carrier frequency of the UE to the interference band carrier frequency of the UE, and updating the current penalty value of the interference band of the UE;
wherein, PCCPCH _ RSCP is the received signal number power RSCP value of the cell where the current UE is located, the penalty1 is the current penalty value of the UE non-interference band, and PCCPCH _ RSCPAdjiPresetting a parameter Th to be 3-6 dB and a parameter ALPHA to be 0-3 dB for the RSCP value of any adjacent region of the cell where the current UE is located;
or,
when the source area of the UE is the UE interference area, if all the adjacent areas of the current cell where the UE is located do not meet the following conditions:
PCCPCH_RSCPS-penalty2-PCCPCH_RSCPAdji＜Th+ALPHA
judging the current UE trans-regional; triggering adjustment from the UE interference band carrier frequency to the UE non-interference band carrier frequency, and updating the current penalty value of the UE non-interference band; where penalty2 is the current penalty value of the UE interference band.
2. The method of claim 1, wherein the parameters further include a penalty value maximum;
the step of judging whether the UE crosses the region according to the current penalty value of the source region of the UE and the pilot frequency value reported by the current UE further comprises the following steps:
after the updating is finished, if the current penalty value of the UE target area is larger than the maximum penalty value, the current penalty value of the UE target area is adjusted to be the maximum penalty value.
3. The method of claim 1, further comprising:
after the penalty timer is overtime, if the adjustment from the UE source area carrier frequency to the UE target area carrier frequency is detected, the step of starting the penalty timer is continuously executed after the adjustment is finished.
4. The method of claim 1, further comprising:
and closing the penalty timer after the UE adjusts the current cell.
5. A carrier frequency adjustment system, comprising:
the configuration module is used for configuring parameters of the penalty timer, and the parameters comprise penalty duration and a penalty value initial value;
the starting module is used for starting a penalty timer;
the judging module is used for judging whether the UE spans the area or not according to the current penalty value of the UE source area and the pilot frequency value reported by the current UE before the penalty timer is overtime, wherein the initial value of the UE source area penalty value is equal to the initial value of the penalty value;
the triggering module is used for triggering the adjustment from the source region carrier frequency of the UE to the target region carrier frequency of the UE when the current UE is in a cross-region state;
the updating module is used for updating the current penalty value of the UE target area; wherein an initial value of a UE target area penalty value is equal to the initial value of the penalty value;
the updating module is specifically configured to update a current penalty value of the UE target area according to a preset penalty step;
wherein, the judging module comprises:
a first determining unit, configured to, when the source region of the UE is a UE non-interference band, if any neighboring cell of a cell where the current UE is located does not satisfy the following condition:
PCCPCH_RSCPS+penalty1-PCCPCH_RSCPAdji≥Th-ALPHA
judging the current UE trans-regional; wherein, PCCPCH _ RSCPSThe received signal number power RSCP value of the cell where the current UE is located, the penalty1 is the current penalty value of the UE non-interference band, PCCPCH _ RSCPAdjiPresetting a parameter Th to be 3-6 dB and a parameter ALPHA to be 0-3 dB for the RSCP value of any adjacent region of the cell where the current UE is located;
a second determining unit, configured to, when the source region of the UE is the UE interference band, if all neighboring cells of the cell where the current UE is located do not satisfy the following condition:
PCCPCH_RSCPS-penalty2-PCCPCH_RSCPAdji≥Th+ALPHA
judging the current UE trans-regional; wherein, the penalty2 is the current penalty value of the UE interference band;
the trigger module includes:
the first trigger unit is used for triggering the adjustment from the UE non-interference band carrier frequency to the UE interference band carrier frequency; or,
the second trigger unit is used for triggering the adjustment from the UE interference band carrier frequency to the UE non-interference band carrier frequency; and updating the current penalty value of the UE non-interference band
The update module includes:
a first updating unit, configured to update a current penalty value of the UE interference band; or,
and the second updating unit is used for updating the current penalty value of the UE non-interference band.
6. The system of claim 5, wherein the parameters further include a penalty value maximum;
the system further comprises:
and the penalty value adjusting module is used for adjusting the current penalty value of the UE target area to be the maximum penalty value if the current penalty value of the UE target area is larger than the maximum penalty value after the updating is finished.
7. The system of claim 5, wherein the system further comprises:
and the detection module is used for informing the starting module to start the penalty timer after the adjustment is finished if the adjustment from the source region carrier frequency of the UE to the target region carrier frequency of the UE is detected after the penalty timer is overtime.
8. The system of claim 5, wherein the system further comprises:
and a closing module, configured to close the penalty timer after the UE adjusts the current cell.
CN201010226352.0A 2010-07-06 2010-07-06 Carrier frequency regulation method and system Active CN102316463B (en)

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