CN102256359A - Method and equipment for processing radio link deterioration - Google Patents
Method and equipment for processing radio link deterioration Download PDFInfo
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Abstract
The embodiment of the invention relates to the technical field of radio communication, in particular to a method and equipment for processing radio link deterioration, which solves the problem that target user equipment can not meet performance requirements or drop calls easily because the resources of the target user equipment with radio link deterioration are adjusted in the traditional scheme for processing radio link deterioration in the prior art. The method provided by the embodiment of the invention comprises the following steps of: after the link quality of first user equipment deteriorates, selecting second user equipment generating interference on the first user equipment from an adjacent cell with the same frequency to a cell where the first user equipment locates; and adjusting partial or all resources of the second user equipment generating interference on the first user equipment. Because the interference generated by user equipment in the adjacent cell with the same frequency in the target user equipment with radio link deterioration is reduced in the embodiment of the invention, the possibility of the situation that the adjusted target user equipment does not have available resources or has available resources but can still not meet performance requirements is reduced.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for handling wireless link degradation.
Background
In a wireless mobile communication system, for an accessed terminal, when strong co-frequency co-slot interference occurs, the quality of a radio link of user equipment is rapidly deteriorated, on one hand, the user equipment can improve power as much as possible to resist the interference, but the system interference is raised in such a way, on the other hand, through a radio link monitoring (RLS) method, when the quality of the radio link of the user equipment is monitored to be deteriorated to a certain degree, resource adjustment is performed on the radio link so as to avoid the interference, the link quality is recovered, and the performance meets the requirements. The link quality degradation can be judged by the transmission power or the BLER (Block Error Rate), and the like, and after the degradation, some adjustment strategies can be tried to adjust the resources of the target user equipment, where the adjustment strategies include the adjustment of resources such as switching, frequency/time slot/code channel, and the like.
The current processing flow is as follows:
periodically detecting the wireless link and judging whether the wireless link is deteriorated;
the resources of the target user equipment are adjusted after determining that the radio link is degraded.
In the current scheme, resource adjustment of a target ue where radio link degradation occurs after the radio link degradation is used to recover the link quality. This approach is likely to cause the adjusted target ue to have no or no resources available, but still not meet the performance requirements.
In summary, in the current scheme for handling radio link degradation, the resource adjustment for the target ue with radio link degradation is likely to cause the adjusted target ue to have no or available resources but still not meet the performance requirement.
Disclosure of Invention
Embodiments of the present invention provide a method and a device for processing radio link degradation, so as to solve a problem that, in a scheme for processing radio link degradation in the prior art, resource adjustment for a target ue that has radio link degradation is easily performed, and the adjusted target ue has no or available resources but cannot meet performance requirements after adjustment.
The method for processing wireless link deterioration provided by the embodiment of the invention comprises the following steps:
after the link quality of first user equipment is deteriorated, selecting second user equipment which generates interference on the first user equipment from the same-frequency adjacent cells of the cell to which the first user equipment belongs;
and adjusting the resources of part or all of the second user equipment which generates interference to the first user equipment so as to reduce the interference generated to the first user equipment.
Preferably, selecting the second user equipment which generates interference to the first user equipment further comprises:
and determining a first interference power value of each user equipment in each co-frequency adjacent cell to each time slot of the cell to which the first user equipment belongs.
Preferably, selecting the second user equipment that causes interference to the first user equipment comprises:
and taking the user equipment with the corresponding first interference power value larger than the first threshold value as second user equipment generating interference on the first user equipment.
Preferably, in the multi-antenna system, before selecting the second user equipment that generates interference to the first user equipment, the method further includes:
determining an incoming wave angle of each user equipment in each co-frequency adjacent cell;
selecting a second user equipment that interferes with the first user equipment comprises:
and taking the user equipment of which the corresponding first interference power value is larger than a first threshold value and the incoming wave angle difference between the user incoming wave angle and the first user equipment is smaller than a second threshold value as second user equipment generating interference on the first user equipment.
Preferably, adjusting the resource of the second user equipment comprises:
according to the sequence of the first interference power values from large to small, adjusting the resource of the second user equipment which is not adjusted from the determined second user equipment, and checking whether the link quality of the first user equipment is recovered or not after adjusting the first number of second user equipment;
if yes, stopping adjustment; otherwise, returning to the step of adjusting the resource of the second user equipment which is not adjusted from the determined second user equipment.
Preferably, after determining the interference power value, selecting a second user equipment that generates interference to the first user equipment further includes:
and adding the interference power values of each user equipment belonging to the same cell to the same time slot to obtain a second interference power value of each co-frequency adjacent cell to each time slot of the cell to which the first user equipment belongs.
Preferably, selecting the second user equipment that causes interference to the first user equipment comprises:
determining strong interference user equipment in the same-frequency adjacent cell of which the corresponding second interference power value is greater than a third threshold value, wherein the strong interference user equipment is the user equipment of which the difference between the Received Signal Code Power (RSCP) value of the PCCPCH of the cell to which the same user equipment belongs and the RSCP value of the PCCPCH of the cell to which the first user equipment belongs is greater than a fourth threshold value, and the RSCP value of the PCCPCH of the cell to which the same user equipment belongs;
the strong interference user equipment is used as second user equipment which generates interference on the first user equipment;
adjusting the resource of the second user equipment comprises:
according to the sequence of the second interference power values from large to small, taking the cell as a unit, adjusting the resources of all second user equipment in the non-adjusted same-frequency adjacent cells, and checking whether the link quality of the first user equipment is recovered after adjusting a second number of same-frequency adjacent cells;
if yes, stopping adjustment; otherwise, returning to the step of adjusting the resources of all the second user equipment in the same-frequency adjacent cells which are not adjusted.
Preferably, after determining the first interference power value, selecting a second user equipment that generates interference to the first user equipment further includes:
the first interference power value smaller than the first threshold value is set to zero.
Preferably, after determining the second interference power value, selecting the second user equipment which generates interference to the first user equipment further includes:
setting a second interference power value smaller than the second threshold value to zero.
The device for processing wireless link deterioration provided by the embodiment of the invention comprises:
the device comprises a selection module, a judging module and a judging module, wherein the selection module is used for selecting second user equipment which generates interference to first user equipment from a same-frequency adjacent cell of a cell to which the first user equipment belongs after the link quality of the first user equipment is deteriorated;
and the adjusting module is used for adjusting part or all of resources of the second user equipment which generates interference on the first user equipment so as to reduce the interference generated on the first user equipment.
Preferably, the selection module is further configured to:
before selecting a second user equipment generating interference to the first user equipment, determining a first interference power value of each user equipment in each co-frequency adjacent cell to each time slot of a cell to which the first user equipment belongs.
Preferably, the selection module is specifically configured to:
and taking the user equipment with the corresponding first interference power value larger than the first threshold value as second user equipment generating interference on the first user equipment.
Preferably, in a multi-antenna system, the selection module is specifically configured to:
and determining an incoming wave angle of each user equipment in each co-frequency adjacent cell, and taking the user equipment of which the corresponding first interference power value is larger than a first threshold value and the incoming wave angle difference between the user incoming wave angle and the first user equipment is smaller than a second threshold value as second user equipment generating interference on the first user equipment.
Preferably, the adjusting module is specifically configured to:
according to the sequence of the first interference power values from large to small, adjusting the resource of the second user equipment which is not adjusted from the determined second user equipment, and checking whether the link quality of the first user equipment is recovered or not after adjusting the first number of second user equipment; if yes, stopping adjustment; otherwise, returning to the step of adjusting the resource of the second user equipment which is not adjusted from the determined second user equipment.
Preferably, the selection module is further configured to:
after the interference power value is determined, before selecting a second user equipment which generates interference to the first user equipment, adding the interference power values of each user equipment which belongs to the same cell to the same time slot to obtain a second interference power value of each co-frequency adjacent cell to each time slot of the cell to which the first user equipment belongs.
Preferably, the selection module is specifically configured to:
determining strong interference user equipment in the same-frequency adjacent cell of which the corresponding second interference power value is greater than a second threshold value, wherein the strong interference user equipment is the user equipment of which the difference between the Received Signal Code Power (RSCP) value of the PCCPCH of the cell to which the same user equipment belongs and the RSCP value of the PCCPCH of the cell to which the first user equipment belongs is greater than a third threshold value, and the RSCP value of the PCCPCH of the cell to which the same user equipment belongs; the strong interference user equipment is used as second user equipment which generates interference on the first user equipment;
the adjustment module is specifically configured to:
according to the sequence of the second interference power values from large to small, taking the cell as a unit, adjusting the resources of all second user equipment in the non-adjusted same-frequency adjacent cells, and checking whether the link quality of the first user equipment is recovered after adjusting a second number of same-frequency adjacent cells; if yes, stopping adjustment; otherwise, returning to the step of adjusting the resources of all the second user equipment in the same-frequency adjacent cells which are not adjusted.
Preferably, the selection module is further configured to:
after the first interference power value is determined, the first interference power value smaller than a first threshold value is set to be zero before a second user equipment generating interference to the first user equipment is selected.
Preferably, the selection module is further configured to:
after the second interference power value is determined, the second interference power value smaller than the second threshold value is set to zero before the second user equipment which generates interference to the first user equipment is selected.
The embodiment of the invention reduces the interference of the user equipment in the same-frequency adjacent region to the target user equipment with the deteriorated wireless link, thereby reducing the occurrence probability that the adjusted target user equipment has no resource or has resource but still can not meet the performance requirement after adjustment; further improving the resource utilization rate.
Drawings
Fig. 1 is a flowchart illustrating a first method for handling radio link degradation according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a second method for handling radio link degradation according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an apparatus for handling wireless link degradation according to an embodiment of the present invention.
Detailed Description
In the embodiment of the invention, after the link quality of the first user equipment is deteriorated, the interference to the first user equipment is reduced by the resource of the second user equipment which generates interference to the first user equipment in the same-frequency adjacent cell of the cell to which the first user equipment belongs. The embodiment of the invention reduces the interference of the user equipment in the same-frequency adjacent region to the target user equipment with the deteriorated wireless link, thereby reducing the occurrence probability that the adjusted target user equipment has no resource or has resource but still can not meet the performance requirement after adjustment; further improving the resource utilization rate.
The embodiments of the present invention will be described in further detail with reference to the drawings attached hereto.
As shown in fig. 1, a first method for handling radio link degradation according to an embodiment of the present invention includes the following steps:
step 101, after the link quality of a first user equipment is deteriorated, selecting a second user equipment which generates interference to the first user equipment from a same-frequency adjacent cell of a cell to which the first user equipment belongs;
In implementation, the processing is different according to different application scenes.
Scene one, apply to single antenna system.
Preferably, the embodiment of the present invention may select, according to the interference power value, a second user equipment that generates interference to the first user equipment from a co-frequency neighboring cell of a cell to which the first user equipment belongs;
correspondingly, step 101 may further include:
and determining a first interference power value of each user equipment in each co-frequency adjacent cell to each time slot of the cell to which the first user equipment belongs.
And a second scenario is applied to a multi-antenna system.
Preferably, the embodiment of the present invention may select, according to the interference power value, a second user equipment that generates interference to the first user equipment from a co-frequency neighboring cell of a cell to which the first user equipment belongs;
correspondingly, step 101 may further include:
and determining a first interference power value of each user equipment in each co-frequency adjacent cell to each time slot of the cell to which the first user equipment belongs and an incoming wave angle of each user equipment in each co-frequency adjacent cell.
In implementation, in scenario one and scenario two, before determining a first interference power value of each ue in each co-frequency neighboring cell to each timeslot of a cell to which the first ue belongs, a co-frequency neighboring cell channel estimation value needs to be obtained:
specifically, the channel estimation results of the cell and the neighboring cells to which the first user equipment belongs may be obtained by using the channel estimation codes of the cell to which the first user equipment belongs and each neighboring cell and using a multi-code set channel estimation method, for example, the same-frequency neighboring cell channel estimation value may be obtained by using the multi-code set signal estimation method of the time slot code division multiple access system proposed in application No. 200510075205.7.
Besides the above-mentioned manner, other methods capable of obtaining channel estimation values of neighboring cells on the same frequency are applicable to the embodiments of the present invention, for example, a method of MMSE (Minimum Mean Square Error) joint detection is used to obtain channel estimation values of multiple cells.
Preferably, a first interference power value of each ue in each co-frequency neighboring cell to each timeslot of the cell to which the first ue belongs can be determined by using formula one:
wherein,
is the channel estimation result of the kth user equipment of the adjacent cell, m is the serial number of the adjacent cell, k is the serial number of the user equipment of the mth adjacent cell, 
is the first interference power value of the kth user equipment of the mth neighbor cell; w is the time width of the channel estimate. Where the channel estimate response vector is the value over W taps at chip intervals.
Preferably, the method of formula two and angle search can be used to determine the incoming wave angle of each user equipment in each co-frequency neighboring cell.
wherein S isθIs the antenna array response vector corresponding to the theta direction.
In implementation, the search can be performed in steps of 1 degree
And the angle corresponding to the maximum value theta is the incoming wave angle of the user.
Preferably, after the interference power value is determined, before selecting the second user equipment which generates interference to the first user equipment, the interference power values of each user equipment which belongs to the same cell and is in the same time slot may be added to obtain a second interference power value of each co-frequency neighbor cell and each time slot of the cell to which the first user equipment belongs. Namely, it is
Where K is the total number of mth neighbor cell user equipments.
In order to improve the processing speed and the system efficiency for adjusting the resource priority, preferably, after the first interference power value is determined, a first interference power value smaller than a first threshold value may be further set to zero before the second user equipment which generates interference to the first user equipment is selected, and/or after the second interference power value is determined, a second interference power value smaller than a second threshold value may be further set to zero before the second user equipment which generates interference to the first user equipment is selected.
The specific first threshold value and the second threshold value may be set according to needs or simulation.
In implementation, a second user equipment which generates interference to the first user equipment can be selected from the co-frequency neighbor cells of the cell to which the first user equipment belongs according to the first interference power value; or selecting a second user equipment which generates interference to the first user equipment from the same-frequency neighbor cells of the cell to which the first user equipment belongs according to the second interference power value. The following are described separately.
The first mode is that second user equipment which generates interference to the first user equipment is selected from the same-frequency adjacent cells of the cell to which the first user equipment belongs according to the first interference power value.
Specifically, if the method is applied to a single antenna system, in step 101, the user equipment whose corresponding first interference power value is greater than the first threshold is used as the second user equipment that generates interference to the first user equipment; step 101, if the corresponding first interference power value is greater than the first threshold value and is applied to the multi-antenna system, and the difference between the incoming wave angle of the user and the incoming wave angle of the first user equipment is smaller than the second threshold value, the user equipment is used as second user equipment which generates interference to the first user equipment;
correspondingly, in step 102, according to the sequence from large to small of the first interference power value, the resource of the second user equipment which is not adjusted is adjusted from the determined second user equipment, and after the first number of second user equipment is adjusted, whether the link quality of the first user equipment is recovered is checked; if yes, stopping adjustment; otherwise, returning to the step of adjusting the resource of the second user equipment which is not adjusted from the determined second user equipment.
Such as: the second user equipment is A, B, C and D, B, C, A and D in order of the first interference power value from large to small, the first number being 1. After adjusting the resource of the second user equipment B, judging whether the link quality of the first user equipment is recovered, if so, stopping the adjustment; otherwise, continuing to adjust the resources of the second user equipment C, judging whether the link quality of the first user equipment is recovered, and repeating the steps until all the resources of the second user equipment are adjusted or the link quality of the first user equipment is recovered.
Wherein the first number may be set as desired.
And secondly, selecting second user equipment which generates interference on the first user equipment from the same-frequency neighbor cells of the cell to which the first user equipment belongs according to the second interference power value.
Specifically, in step 101, determining a strong interference user equipment in the co-frequency neighboring cell whose corresponding second interference Power value is greater than a third threshold, where the strong interference user equipment is a user equipment whose RSCP value of the PCCPCH (Primary common control physical channel) of its own cell and RSCP (received signal Code Power) value of the PCCPCH of the first user equipment are measured by the same user equipment, and the difference between the RSCP values is greater than the fourth threshold (that is, after one user equipment measures the RSCP value of the PCCPCH of its own cell and the RSCP value of the PCCPCH of the first user equipment, the RSCP value of the PCCPCH of its own cell and the RSCP value of the PCCPCH of the first user equipment are differentiated and compared with the third threshold); the method comprises the steps that strong interference user equipment is used as second user equipment which generates interference on first user equipment;
correspondingly, according to the sequence of the second interference power values from large to small, taking the cell as a unit, adjusting the resources of all the second user equipment in the non-adjusted co-frequency adjacent cells, and checking whether the link quality of the first user equipment is recovered after adjusting the second number of co-frequency adjacent cells; if yes, stopping adjustment; otherwise, returning to the step of adjusting the resources of all the second user equipment in the same-frequency adjacent cells which are not adjusted.
Such as: the second interference power values corresponding to the cells 1, 2 and 3 are greater than the third threshold, the cells 2, 1 and 3 are according to the sequence of the second interference power values from large to small, the second user equipments in the cell 1 are a1 and B1, the second user equipments in the cell 2 are a2, B2 and C2, the second user equipments in the cell 3 are A3, and the second number is 1. After adjusting the resources of the second user equipment A2, B2 and C2 in the cell 2, judging whether the link quality of the first user equipment is recovered, if so, stopping the adjustment; otherwise, after continuing to adjust the resources of the second user equipment a1 and B1 in the cell 1, determining whether the link quality of the first user equipment is recovered, and so on until all the resources of the second user equipment are adjusted or the link quality of the first user equipment is recovered.
Wherein the second number may be set as desired.
And if the user equipment in the same-frequency adjacent cell does not measure the RSCP value of the PCCPCH of the cell to which the user equipment belongs and/or the RSCP value of the PCCPCH of the cell to which the first user equipment belongs, the resource of the user equipment is not adjusted.
Preferably, the scheme in the background art may be adopted before the resource of the second user equipment is adjusted, that is, the resource of the first user equipment is adjusted first, and if the link quality of the first user equipment is not recovered after the adjustment, the scheme of the embodiment of the present invention is adopted to adjust the resource of the second user equipment.
Preferably, in step 102, when the resource of the second user equipment is adjusted, at least one of the following means may be adopted:
1. adjusting the time slot resource of the user equipment, such as from time slot 1 to time slot 2;
2. adjusting frequency domain resources of the user equipment, such as from carrier 1 to carrier 2;
3. adjusting the code channel resources of the user equipment, for example, adjusting from occupying 4 code channel resources to 2 code channel resources;
4. the user equipment is powered down, such as power down from P1 to P2.
It should be noted that the embodiment of the present invention is not limited to the three resource adjustment manners, and the embodiment of the present invention is applicable to any resource adjustment manner that can reduce interference to the first user equipment.
As shown in fig. 2, a second method for handling radio link degradation according to an embodiment of the present invention includes the following steps:
step 201, detecting the wireless link periodically.
Step 202, judging whether the wireless link is deteriorated according to the wireless link detection result, if so. Step 203 is executed; otherwise, the procedure returns to step 201.
Step 203, adjusting the resource of the first user equipment with the wireless link deterioration.
Step 204, judging whether the link quality of the first user equipment is recovered, if so, returning to the step 201; otherwise step 205 is performed.
Step 205, adjusting resources of a part of second user equipments interfering with the first user equipment to reduce interference caused to the first user equipment;
and the second user equipment is in the same-frequency adjacent cell of the cell to which the first user equipment belongs.
Step 206, judging whether the link quality of the first user equipment is recovered, if so, returning to the step 201; otherwise, the procedure returns to step 205.
If the resources of all the user equipment which generates interference to the first user equipment in the same-frequency adjacent cell are adjusted and the link quality of the first user equipment with the degraded wireless link is not recovered, stopping adjustment and exiting the process.
Based on the same inventive concept, the embodiment of the present invention further provides a device for processing wireless link degradation, and as the principle of the device for solving the problem is similar to the method for processing wireless link degradation, the implementation of the device may refer to the implementation of the method, and repeated details are omitted.
As shown in fig. 3, the apparatus for processing wireless link degradation according to an embodiment of the present invention includes: a selection module 30 and an adjustment module 31.
A selecting module 30, configured to select, after the link quality of the first user equipment deteriorates, a second user equipment that generates interference with the first user equipment from a co-frequency neighboring cell of a cell to which the first user equipment belongs;
the adjusting module 31 is configured to adjust part or all of resources of the second user equipment that generate interference to the first user equipment, so as to reduce the interference generated to the first user equipment.
Preferably, before the selecting module 30 selects the second ue interfering with the first ue, a first interference power value of each ue in each co-frequency neighbor cell to each timeslot of the cell to which the first ue belongs is determined.
Preferably, the selecting module 30 selects the user equipment whose corresponding first interference power value is greater than the first threshold as the second user equipment interfering with the first user equipment.
Preferably, if the method is applied to the multi-antenna system, the selection module 30 determines the incoming wave angle of each ue in each co-frequency neighboring cell, and uses the ue whose corresponding first interference power value is greater than the first threshold and whose incoming wave angle difference between the user incoming wave angle and the first ue is smaller than the second threshold as the second ue that generates interference to the first ue.
Preferably, the adjusting module 31 adjusts the resource of the second user equipment that is not adjusted from the determined second user equipment according to the sequence of the first interference power value from large to small, and checks whether the link quality of the first user equipment is recovered after adjusting the first number of second user equipment; if yes, stopping adjustment; otherwise, returning to the step of adjusting the resource of the second user equipment which is not adjusted from the determined second user equipment.
Preferably, after the selecting module 30 determines the interference power value, before selecting the second user equipment that generates interference to the first user equipment, the interference power values of each user equipment that belongs to the same cell and that are in the same time slot are added to obtain a second interference power value of each co-frequency neighbor cell and that is in each time slot of the cell that the first user equipment belongs to.
Preferably, the selecting module 30 determines a strong interference user equipment in the co-frequency neighboring cell whose corresponding second interference power value is greater than the second threshold, where the strong interference user equipment is a user equipment whose difference between the received signal code power RSCP value of the primary common control physical channel PCCPCH of its own cell and the RSCP value of the PCCPCH of the cell to which the first user equipment belongs, measured by the same user equipment, is greater than a third threshold; the method comprises the steps that strong interference user equipment is used as second user equipment which generates interference on first user equipment;
correspondingly, the adjusting module 31 adjusts the resources of all the second user equipments in the non-adjusted co-frequency neighboring cells in the order of the second interference power values from large to small, taking the cell as a unit, and after adjusting a second number of co-frequency neighboring cells, checks whether the link quality of the first user equipment is recovered; if yes, stopping adjustment; otherwise, returning to the step of adjusting the resources of all the second user equipment in the same-frequency adjacent cells which are not adjusted.
Preferably, after the selecting module 30 determines the first interference power value, the first interference power value smaller than the first threshold value is set to zero before the selecting the second user equipment interfering with the first user equipment.
Preferably, after the selecting module 30 determines the second interference power value, the second interference power value smaller than the second threshold value is set to zero before the second user equipment interfering with the first user equipment is selected.
The device in the embodiment of the present invention may be an RNC (Radio Network Controller), an eNodeB (evolved base station), or another device having resource control and adjustment functions on the Network side.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
The embodiment of the invention reduces the interference of the user equipment in the same-frequency adjacent region to the target user equipment with the deteriorated wireless link, thereby reducing the occurrence probability that the adjusted target user equipment has no resource or has resource but still can not meet the performance requirement after adjustment; further improving the resource utilization rate.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (18)
1. A method of handling wireless link degradation, the method comprising:
after the link quality of first user equipment is deteriorated, selecting second user equipment which generates interference on the first user equipment from the same-frequency adjacent cells of the cell to which the first user equipment belongs;
and adjusting the resources of part or all of the second user equipment which generates interference to the first user equipment so as to reduce the interference generated to the first user equipment.
2. The method of claim 1, wherein selecting a second user device that interferes with the first user device further comprises:
and determining a first interference power value of each user equipment in each co-frequency adjacent cell to each time slot of the cell to which the first user equipment belongs.
3. The method of claim 2, wherein selecting a second user device that interferes with the first user device comprises:
and taking the user equipment with the corresponding first interference power value larger than the first threshold value as second user equipment generating interference on the first user equipment.
4. The method of claim 2, wherein selecting the second user equipment that interferes with the first user equipment in a multiple antenna system further comprises:
determining an incoming wave angle of each user equipment in each co-frequency adjacent cell;
selecting a second user equipment that interferes with the first user equipment comprises:
and taking the user equipment of which the corresponding first interference power value is larger than a first threshold value and the incoming wave angle difference between the user incoming wave angle and the first user equipment is smaller than a second threshold value as second user equipment generating interference on the first user equipment.
5. The method of claim 3 or 4, wherein adjusting the resources of the second user equipment comprises:
according to the sequence of the first interference power values from large to small, adjusting the resource of the second user equipment which is not adjusted from the determined second user equipment, and checking whether the link quality of the first user equipment is recovered or not after adjusting the first number of second user equipment;
if yes, stopping adjustment; otherwise, returning to the step of adjusting the resource of the second user equipment which is not adjusted from the determined second user equipment.
6. The method of claim 2, wherein determining the interference power value further comprises, prior to selecting a second user equipment that interferes with the first user equipment:
and adding the interference power values of each user equipment belonging to the same cell to the same time slot to obtain a second interference power value of each co-frequency adjacent cell to each time slot of the cell to which the first user equipment belongs.
7. The method of claim 6, wherein selecting a second user device that interferes with the first user device comprises:
determining strong interference user equipment in the same-frequency adjacent cell of which the corresponding second interference power value is greater than a third threshold value, wherein the strong interference user equipment is the user equipment of which the difference between the Received Signal Code Power (RSCP) value of the PCCPCH of the cell to which the same user equipment belongs and the RSCP value of the PCCPCH of the cell to which the first user equipment belongs is greater than a fourth threshold value, and the RSCP value of the PCCPCH of the cell to which the same user equipment belongs;
the strong interference user equipment is used as second user equipment which generates interference on the first user equipment;
adjusting the resource of the second user equipment comprises:
according to the sequence of the second interference power values from large to small, taking the cell as a unit, adjusting the resources of all second user equipment in the non-adjusted same-frequency adjacent cells, and checking whether the link quality of the first user equipment is recovered after adjusting a second number of same-frequency adjacent cells;
if yes, stopping adjustment; otherwise, returning to the step of adjusting the resources of all the second user equipment in the same-frequency adjacent cells which are not adjusted.
8. The method of claim 2, wherein determining the first interference power value further comprises, prior to selecting the second user equipment that interferes with the first user equipment:
the first interference power value smaller than the first threshold value is set to zero.
9. The method of claim 6, wherein determining the second interference power value further comprises, prior to selecting the second user equipment that interferes with the first user equipment:
setting a second interference power value smaller than the second threshold value to zero.
10. An apparatus for handling wireless link degradation, the apparatus comprising:
the device comprises a selection module, a judging module and a judging module, wherein the selection module is used for selecting second user equipment which generates interference to first user equipment from a same-frequency adjacent cell of a cell to which the first user equipment belongs after the link quality of the first user equipment is deteriorated;
and the adjusting module is used for adjusting part or all of resources of the second user equipment which generates interference on the first user equipment so as to reduce the interference generated on the first user equipment.
11. The device of claim 10, wherein the selection module is further to:
before selecting a second user equipment generating interference to the first user equipment, determining a first interference power value of each user equipment in each co-frequency adjacent cell to each time slot of a cell to which the first user equipment belongs.
12. The device of claim 11, wherein the selection module is specifically configured to:
and taking the user equipment with the corresponding first interference power value larger than the first threshold value as second user equipment generating interference on the first user equipment.
13. The device of claim 11, wherein, in a multi-antenna system, the selection module is specifically configured to:
and determining an incoming wave angle of each user equipment in each co-frequency adjacent cell, and taking the user equipment of which the corresponding first interference power value is larger than a first threshold value and the incoming wave angle difference between the user incoming wave angle and the first user equipment is smaller than a second threshold value as second user equipment generating interference on the first user equipment.
14. The device of claim 12 or 13, wherein the adjustment module is specifically configured to:
according to the sequence of the first interference power values from large to small, adjusting the resource of the second user equipment which is not adjusted from the determined second user equipment, and checking whether the link quality of the first user equipment is recovered or not after adjusting the first number of second user equipment; if yes, stopping adjustment; otherwise, returning to the step of adjusting the resource of the second user equipment which is not adjusted from the determined second user equipment.
15. The device of claim 11, wherein the selection module is further to:
after the interference power value is determined, before selecting a second user equipment which generates interference to the first user equipment, adding the interference power values of each user equipment which belongs to the same cell to the same time slot to obtain a second interference power value of each co-frequency adjacent cell to each time slot of the cell to which the first user equipment belongs.
16. The device of claim 15, wherein the selection module is specifically configured to:
determining strong interference user equipment in the same-frequency adjacent cell of which the corresponding second interference power value is greater than a second threshold value, wherein the strong interference user equipment is the user equipment of which the difference between the Received Signal Code Power (RSCP) value of the PCCPCH of the cell to which the same user equipment belongs and the RSCP value of the PCCPCH of the cell to which the first user equipment belongs is greater than a third threshold value, and the RSCP value of the PCCPCH of the cell to which the same user equipment belongs; the strong interference user equipment is used as second user equipment which generates interference on the first user equipment;
the adjustment module is specifically configured to:
according to the sequence of the second interference power values from large to small, taking the cell as a unit, adjusting the resources of all second user equipment in the non-adjusted same-frequency adjacent cells, and checking whether the link quality of the first user equipment is recovered after adjusting a second number of same-frequency adjacent cells; if yes, stopping adjustment; otherwise, returning to the step of adjusting the resources of all the second user equipment in the same-frequency adjacent cells which are not adjusted.
17. The device of claim 11, wherein the selection module is further to:
after the first interference power value is determined, the first interference power value smaller than a first threshold value is set to be zero before a second user equipment generating interference to the first user equipment is selected.
18. The device of claim 15, wherein the selection module is further to:
after the second interference power value is determined, the second interference power value smaller than the second threshold value is set to zero before the second user equipment which generates interference to the first user equipment is selected.
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