CN103634803B - A kind of method for reducing co-channel interference - Google Patents
A kind of method for reducing co-channel interference Download PDFInfo
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- CN103634803B CN103634803B CN201210298766.3A CN201210298766A CN103634803B CN 103634803 B CN103634803 B CN 103634803B CN 201210298766 A CN201210298766 A CN 201210298766A CN 103634803 B CN103634803 B CN 103634803B
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Abstract
This application discloses a kind of method for reducing co-channel interference, including：According to the principle that the frequency resource of the broadcast/synchronizing channel of neighbor cell is mutually orthogonal, it is the frequency resource of each cell configuration broadcast/synchronizing channel；For each cell, according to the principle that the access frequency band of neighbor cell is mutually orthogonal, a part of frequency resource is selected from the Traffic Channel frequency resource of the cell as the access frequency band of the cell；The subset for accessing the edge band resource of cell when frequency band is interference coordination of each cell；Frequency resource of the network side using the broadcast/synchronizing channel of each cell, broadcasts the relevant information accessed for user；When the broadcast message that UE is listened to and initiating Stochastic accessing and attachment flow to base station, base station controls UE on the access frequency band of UE affiliated subdistricts using default down channel transmit power and completes corresponding access and attachment.The present invention is linked into the co-channel interference completed during adhering to from user in effectively reducing identical networking.
Description
Technical field
The present invention relates to the resource configuration technology of mobile communication system, more particularly to a kind of side for reducing co-channel interference
Method.
Background technology
In the cellular radio Communication system based on OFDM technology, intra-cell users are realized between signal by frequency division multiplexing
It is mutually orthogonal, to solve the problems, such as intra-cell interference.But used as cost, identical networking can bring stronger presence of intercell interference.
Meanwhile, Cell Edge User and the user in base station coverage area " blind spot ", often dtr signal, once it is subject to co-channel interference
Afterwards, whole transmission process can have problems.Wherein, the random access procedure of user is particularly important；User adhered to simultaneously
Journey has chain of command delay requirement.For a user, from Stochastic accessing to this section of process of attachment, the high-level signaling of transmission is just compared
Often business is even more important.Therefore, how during this period of time, presence of intercell interference is reduced, improves user and access, adhere to once success
Ratio, become an important subject of wireless communication system.
For identical networking, interference is carried out using interference coordination contour level algorithm generally at present and is avoided, but interference coordination
Algorithm needs user equipment（UE）The measurement such as RSRP in this cell and adjacent area amount is used as input competence exertion effect, and UE is only
After being successfully accessed cell and completing attachment just can carry out the measurement of this cell and adjacent cell RSRP, and report base station.
That is, current interference coordination schemes can only be after UE completes attachment, there is provided effectively co-channel interference protection, and uncomfortable
For UE from be linked into complete adhere to process.
In the systems such as current LTE, in order to ensure the accuracy of signalling during Stochastic accessing, improve user and access number
Amount, is adopted relatively low modulation system and code check in Stochastic accessing to attaching process, and is transmitted by the HARQ/ARQ of bottom
User is from the process for accessing to attachment.
But, when minizone co-channel interference is larger, during user's Stochastic accessing, channel is poor, and message 2,3,4 may be always
Pass wrong, so as to cause UE smoothly complete random access procedure.In addition, after the completion of Stochastic accessing, minizone co-channel interference compared with
Greatly, attaching process HARQ/ARQ retransmits more frequent, it is also difficult to meet the chain of command delay requirement of user, makes user adhere to failure.
At present, it is linked into the same frequency completed during adhering in not yet proposing a kind of energy effectively solving identical networking to do from user
The method for disturbing problem.
The content of the invention
In view of this, present invention is primarily targeted at providing a kind of method for reducing co-channel interference, can effectively reduce same
Be linked into from user in frequency networking complete adhere to during co-channel interference.
In order to achieve the above object, technical scheme proposed by the present invention is：
A kind of method for reducing co-channel interference, including：
In advance according to the mutually orthogonal principle of the frequency resource of the broadcast/synchronizing channel of neighbor cell, it is each cell configuration
The frequency resource of broadcast/synchronizing channel；For each cell, the mutually orthogonal principle of frequency band is accessed according to neighbor cell, from
A part of frequency resource is selected in the Traffic Channel frequency resource of the cell as the access frequency band of the cell；Wherein, each cell
Access frequency band edge band resource of cell when being default interference coordination subset；
Frequency resource of the network side using the broadcast/synchronizing channel of each cell, broadcasts the relevant information accessed for user；
When user equipment (UE) is according to the broadcast message listened in the broadcast/synchronizing channel of this cell, to base station
When initiating Stochastic accessing and attachment flow, the base station is adopted belonging to default down channel transmit power PA_ini and the UE
The access frequency band of cell, controls the UE and completes corresponding access and attaching process；Down channel transmit power PA_
The down channel transmission power value of the edge customer of UE affiliated subdistricts when ini is more than or equal to default interference coordination.
In sum, the method for reducing co-channel interference proposed by the present invention, is linked into for user by arranging each cell
Access frequency band during completing attaching process, and the access band resource pairwise orthogonal of neighbor cell is made, as such, it is possible to significantly
The co-channel interference completed during attachment is linked into from user in reduction identical networking.
Description of the drawings
Schematic flow sheets of the Fig. 1 for the embodiment of the present invention one.
Specific embodiment
It is to make the object, technical solutions and advantages of the present invention clearer, right below in conjunction with the accompanying drawings and the specific embodiments
The present invention is described in further detail.
The present invention core concept be：Broadcast for neighbor cell/synchronizing channel configures different frequency resources and makes it
Pairwise orthogonal, meanwhile, be the respective access frequency band of each cell configuration in advance, make the access frequency band pairwise orthogonal of neighbor cell,
The access frequency band will be used for transmission during user's Stochastic accessing is resident to user and use, as such, it is possible to make neighbor cell
User be linked into during completing attaching process in user, using different band resources, such that it is able to be prevented effectively from this phase
Between problem of co-channel interference.
Fig. 1 is the schematic flow sheet of the method that the embodiment of the present invention one reduces co-channel interference, as shown in figure 1, the method master
Including：
Step 101, in advance according to the mutually orthogonal principle of the frequency resource of the broadcast/synchronizing channel of neighbor cell, be each
The frequency resource of cell configuration broadcast/synchronizing channel；For each cell, the access frequency band according to neighbor cell is mutually orthogonal
Principle, selects a part of frequency resource from the Traffic Channel frequency resource of the cell as the access frequency band of the cell；Wherein,
The subset of the edge band resource of the cell when access frequency band of each cell is default interference coordination.
Here, from unlike existing system, this step is by assuring that the frequency money of the broadcast/synchronizing channel of neighbor cell
Source is mutually orthogonal, such that it is able to the co-channel interference for overcoming adjacent area broadcast singal to produce.
In addition, access frequency band this concept is also introduced in this step, so as in UE access networks in certain frequency
The corresponding transfer resource of configuration in scope of resource, and make the access frequency band of neighbor cell mutually orthogonal, in this way it can be ensured that adjacent area
The reduction of co-channel interference.
The frequency resource of step 102, network side using the broadcast/synchronizing channel of each cell, broadcasts what is accessed for user
Relevant information.
The concrete broadcasting method of this step will not be described here compared with system.
Step 103, when UE is according to the broadcast message listened in the broadcast/synchronizing channel of this cell, to base station
When initiating Stochastic accessing and attachment flow, the base station is adopted belonging to default down channel transmit power PA_ini and the UE
The access frequency band of cell, controls the UE and completes corresponding access and attaching process；Down channel transmit power PA_
The down channel transmission power value of the edge customer of UE affiliated subdistricts when ini is more than or equal to default interference coordination.
Need exist for explanation, due to the access frequency band of adjacent cell be it is mutually orthogonal, therefore, base station user access
And in attaching process, on the access frequency band of the UE affiliated subdistricts, control the UE and complete corresponding access and adhere to,
The mutual co-channel interference that effectively can be reduced between the access attachment transmission between adjacent cell affects.And while by using under described
Row channel transmission power PA_ini, and access frequency band is limited as the subset at interference coordination edge, effectively can reduce between adjacent cell
Business transmission and the mutual co-channel interference accessed between attachment transmission affect.
It is preferred that base station is on the access frequency band of the UE affiliated subdistricts, controls the UE and complete corresponding access
With the concrete grammar for adhering to can be：
After the base station receives random access request message 1 that the UE sends, described in the UE affiliated subdistricts
Access in frequency band range, be that each message in the Stochastic accessing and attachment flow in addition to the message 1 is selected for message
The frequency resource of transmission, and downlink transmission power is configured to into the PA_ini.
Here, by limiting for sending message in access and attaching process（Each message in addition to message 1）When made
Frequency resource, it is ensured that the frequency resource used when access is with attachment by neighbor cell user is mutually orthogonal, meanwhile, make descending
The down channel of the edge customer of UE affiliated subdistricts when channel transmission power PA_ini is more than or equal to default interference coordination
Transmission power value, as such, it is possible to be prevented effectively from the co-channel interference in this process.Due to the detailed process of above-mentioned access and attachment it is same
Existing system, therefore, concrete message therein is that those skilled in the art are known, be will not be described here.
It is preferred that methods described and existing disturbance coordination method are engaged, i.e., after the UE completes attaching process,
By start interference coordination, to the UE using frequency resource be adjusted.Thus, can be by interference coordination come to completing
UE after attachment carries out the reasonable disposition of frequency resource, to further ensure that the same frequency reduced when user carries out business transmission is done
Disturb.
It is preferred that for the problem of co-channel interference that business transmission was avoided before interference coordination startup further, it is ensured that use
The service transmission quality at family, can be after UE completes attaching process, by the edge of base station UE affiliated subdistricts in interference coordination
In the range of band resource, be the UE be configured to up-downgoing business transmission frequency resource, while downlink transmission power is configured
For the PA_ini, until system start-up interference coordination.So, you can the business of user is transmitted before interference coordination starts into
Row protection, reduces the impact of co-channel interference.
In addition, in order to further reduce the co-channel interference produced to broadcast channel when business is transmitted, each cell is not in its phase
Service signal is sent in the frequency resource of the broadcast/synchronizing channel of adjacent cell, i.e., for each cell, in needing for the cell
UE configuration service transmission channels when, in the available resources in addition to the frequency resource of the broadcast/synchronizing channel of its neighbor cell
In carry out the configuration of the service transmission channel.
In sum, presently preferred embodiments of the present invention is these are only, is not intended to limit protection scope of the present invention.
All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in the present invention's
Within protection domain.
Claims (5)
1. it is a kind of reduce co-channel interference method, it is characterised in that include：
In advance according to the mutually orthogonal principle of the frequency resource of the broadcast/synchronizing channel of neighbor cell, be each cell configuration broadcast/
The frequency resource of synchronizing channel；For each cell, according to the principle that the access frequency band of neighbor cell is mutually orthogonal, from the cell
Traffic Channel frequency resource in select a part of frequency resource as the access frequency band of the cell；Wherein, each cell is described
Access the subset of the edge band resource of cell when frequency band is default interference coordination；
Frequency resource of the network side using the broadcast/synchronizing channel of each cell, broadcasts the relevant information accessed for user；
When user equipment (UE) is according to the broadcast message listened in the broadcast/synchronizing channel of this cell, initiate to base station
When Stochastic accessing and attachment flow, the base station adopts default down channel transmit power PA_ini and the UE affiliated subdistricts
The access frequency band, control the UE and complete corresponding access and attaching process；Down channel transmit power PA_ini
More than or equal to the down channel transmission power value of the edge customer of UE affiliated subdistricts during default interference coordination.
2. method according to claim 1, it is characterised in that the base station adopts default down channel transmit power
PA_ini, controls the UE on the access frequency band of the UE affiliated subdistricts and completes corresponding access and attachment includes：
After the base station receives random access request message 1 that the UE sends, in the access of the UE affiliated subdistricts
In frequency band range, it is that each message in the Stochastic accessing and attachment flow in addition to the message 1 selects to send for message
Frequency resource, and downlink transmission power is configured to into the PA_ini.
3. method according to claim 1, it is characterised in that methods described is further included：
After the UE completes attaching process, the edge band money of base station UE affiliated subdistricts in default interference coordination
In source range, it is frequency resource that the UE is configured to the transmission of up-downgoing business, while downlink transmission power is configured to described
PA_ini, until system start-up interference coordination.
4. method according to claim 1, it is characterised in that methods described is further included：
After the UE completes attaching process, by start interference coordination, to the UE using frequency resource be adjusted.
5. method according to claim 1, it is characterised in that methods described is further included：
For each cell, during UE configuration service transmission channels in needing for the cell, the broadcast except its neighbor cell/
The configuration of the service transmission channel is carried out in available resources outside the frequency resource of synchronizing channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210298766.3A CN103634803B (en) | 2012-08-21 | 2012-08-21 | A kind of method for reducing co-channel interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210298766.3A CN103634803B (en) | 2012-08-21 | 2012-08-21 | A kind of method for reducing co-channel interference |
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| Publication Number | Publication Date |
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| CN103634803A CN103634803A (en) | 2014-03-12 |
| CN103634803B true CN103634803B (en) | 2017-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210298766.3A Expired - Fee Related CN103634803B (en) | 2012-08-21 | 2012-08-21 | A kind of method for reducing co-channel interference |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106162653B (en) * | 2015-03-23 | 2021-02-12 | 中兴通讯股份有限公司 | Method and device for realizing same-frequency networking of different systems |
| CN108243508A (en) * | 2016-12-23 | 2018-07-03 | 北京佰才邦技术有限公司 | A kind of resource allocation method, method for sending information, base station and terminal |
| CN106912058B (en) * | 2017-04-28 | 2020-07-24 | 国网浙江省电力公司宁波供电公司 | Channel interference coordination method and device |
| CN113381796B (en) * | 2020-02-25 | 2023-04-18 | 大唐移动通信设备有限公司 | Resource allocation method, resource determination method, device, network side equipment and terminal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101730257A (en) * | 2008-10-13 | 2010-06-09 | 大唐移动通信设备有限公司 | Signal transmission method, signal transmission equipment, system random access method and user equipment |
| CN102469467A (en) * | 2010-11-15 | 2012-05-23 | 大唐移动通信设备有限公司 | Method and equipment for allocating resource |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101730257A (en) * | 2008-10-13 | 2010-06-09 | 大唐移动通信设备有限公司 | Signal transmission method, signal transmission equipment, system random access method and user equipment |
| CN102469467A (en) * | 2010-11-15 | 2012-05-23 | 大唐移动通信设备有限公司 | Method and equipment for allocating resource |
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| CN103634803A (en) | 2014-03-12 |
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Granted publication date: 20170405 |