CN102318195A - Co-channel interference suppression method and device - Google Patents

Co-channel interference suppression method and device Download PDF

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Publication number
CN102318195A
CN102318195A CN2009800001213A CN200980000121A CN102318195A CN 102318195 A CN102318195 A CN 102318195A CN 2009800001213 A CN2009800001213 A CN 2009800001213A CN 200980000121 A CN200980000121 A CN 200980000121A CN 102318195 A CN102318195 A CN 102318195A
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signal
spread spectrum
spread
base station
spectrum function
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CN102318195B (en
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谢铂云
邱勇
刘晟
邢平平
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/005—Interference mitigation or co-ordination of intercell interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques

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

Abstract

A co-channel interference suppression method is provided, which includes steps of: starting a spread spectrum function according to the result of the measurement of a co-channel macro cell (101); spreading the signals to be transmitted, and transmitting the signals which have been spread (102). Also a communication device is provided. According to the method, a micro cell is disposed in a macro cell, the macro cell being in the same frequency as the micro cell. When a terminal in the micro cell is interfered, according to the measurement state of the macro cell, a spread spectrum function is started, and the signals to be transmitted is spread, effectively eliminating the strong interference among the micro cell and the co-channel macro cell in a network.

Description

Co-channel interference suppression method and device
Co-channel interference suppression method and device
The present invention relates to communication technical field, more particularly to a kind of co-channel interference suppression method and device for technical field.
Background technology
User's request is more and more diversified with the development of mobile communication technology, also there is variation to adapt to this demand in system equipment, and the Microcell such as family's in-door covering and the inside coverage base station of enterprise-level and other private networks (Private Network) for receiving much concern is arisen at the historic moment.This Microcell can include the less cell of coverage for macrocell such as Femto cells, Pico cells, for example, can be HeNB (Home eNodeB, home evolved node B）, home cell（Home Cell), access point（Access Point) and private cell（Private Cell) etc., the private network of also some specific frequency layers.This Microcell can include CSG (Closed Subscriber Group, limitation contracted user group) cells and non-CSG cell.
In network design due to the in short supply and costliness of frequency spectrum resource, operator may dispose Microcell and macrocell to make full use of frequency spectrum resource in same frequency.Because picocell coverage area is small, it is fully located in the coverage of macrocell, macrocell will cause very big interference to Microcell.Microcell transmission power is smaller, smaller to the terminal interference beyond Microcell covering in macrocell but larger to residing in the interference of the terminal in macrocell again in Microcell overlay area.
In the prior art, for the interference between macrocell, the methods such as interference randomization, interference elimination and interference coordination technique is employed to eliminate interference, is eliminated for the interference between macrocell and mainly carries out channeling at the edge of cell.But, because whole picocell coverage area is all located in macrocell, it is impossible to the co-channel interference between Microcell and macrocell is eliminated using interference solution between macrocell in the prior art. The content of the invention
The embodiments of the invention provide a kind of co-channel interference suppression method and device, the interference between co-frequency cell is reduced.
On the one hand, the embodiments of the invention provide a kind of co-channel interference suppression method, including：According to the measurement result measured to same frequency macrocell, start spread spectrum function；
Signal to be sent is subjected to spread processing, the signal through spread processing is sent.On the other hand, the embodiment of the present invention additionally provides a kind of co-channel interference suppression method, including：The signal that microcell base station is sent is received, the signal carries out spread processing after microcell base station startup spread spectrum function；The spread spectrum function according to the measurement result measured to same frequency macrocell by starting；
Despreading processing is carried out to the signal received.
On the other hand, the embodiment of the present invention additionally provides a kind of communicator, including：Start unit, for starting spread spectrum function according to the measurement result measured to same frequency macrocell；
Processing unit, for carrying out spread processing to sent signal, and sends the signal through spread processing.
On the other hand, the embodiment of the present invention additionally provides a kind of communicator, including：Receiving unit, the signal for receiving microcell base station transmission, the signal is started by the microcell base station carries out spread processing after spread spectrum function, the spread spectrum function according to the measurement result measured to same frequency macrocell by starting；
Processing unit, the signal received to the receiving unit carries out despreading processing.
The method provided according to embodiments of the present invention, Microcell is disposed in macrocell, macrocell is with Microcell with frequency, when producing interference to the terminal under Microcell, according to the measurement situation to macrocell, start spread spectrum function in microcell base station, spread processing is carried out to sent signal, effectively eliminate in network Microcell and with the strong jamming between frequency macrocell. Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 show a kind of co-channel interference suppression method schematic flow sheet of one embodiment of the present of invention offer；
Fig. 2 show a kind of co-channel interference suppression method schematic flow sheet of an alternative embodiment of the invention offer；
Fig. 3 show a kind of co-channel interference suppression method schematic diagram of an alternative embodiment of the invention offer；
Fig. 4 show a kind of co-channel interference suppression method schematic diagram of an alternative embodiment of the invention offer；
Fig. 5 show a kind of structural representation of communicator of an alternative embodiment of the invention offer；
Fig. 6 show a kind of structural representation of communicator of an alternative embodiment of the invention offer.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention. Reference picture 1, An embodiment provides a kind of co-channel interference suppression method, including：
101 :The measurement result that just blunt evidence is measured to same frequency macrocell, starts spread spectrum function. 102:Signal to be sent is subjected to spread processing, the signal through spread processing is sent.
Reference picture 2, the embodiment of the present invention additionally provides a kind of co-channel interference suppression method, including：
201 :The signal that microcell base station is sent is received, the signal carries out spread processing after microcell base station startup spread spectrum function；The spread spectrum function according to the measurement result measured to same frequency macrocell by starting.
When UE enters the Microcell for allowing access, the signal of microcell base station transmission is received, due in order to suppress Microcell and with the interference between frequency macrocell, spread spectrum function be started in microcell base station, spread processing is carried out to sent signal.
202:Despreading processing is carried out to the signal received.
The method provided according to embodiments of the present invention, Microcell is disposed in macrocell, macrocell is with Microcell with frequency, when producing interference to the terminal under Microcell, according to the measurement situation to macrocell, start spread spectrum function in microcell base station, spread processing is carried out to sent signal, effectively eliminate in network Microcell and with the strong jamming between frequency macrocell.
Reference picture 3, an alternative embodiment of the invention provides a kind of co-channel interference suppression method, including：
301 :Microcell base station measures wireless environment, and spread spectrum function is started according to measurement result.Microcell base station measures the signal intensity with frequency macrocell, if the signal intensity of same frequency macrocell that measurement is obtained meets certain condition with the signal intensity of the Microcell, starts the spread spectrum function in microcell base station.Can be by microcell base station itself according to measurement result startup spread spectrum function；Or microcell base station can be configured by the webmaster node in system, webmaster node starts the spread spectrum function in the microcell base station. Meeting the spread spectrum function in certain condition startup microcell base station according to the signal intensity of the signal intensity of same frequency macrocell and the Microcell can be realized by the following method：
For example, setting signal intensity threshold stesh, the steshIt can be configured by microcell base station or webmaster node, the stoshCan be same frequency macrocell signal intensity and Microcell signal intensity it is equal when value, when the signal intensity of same frequency macrocell that measurement is obtained is more than steshWhen, it is determined that the signal intensity with frequency macrocell is higher than the signal intensity of Microcell, starts the spread spectrum function in microcell base station.Or, when the signal intensity for the same frequency macrocell that measurement is obtained is more than stesh-s.During ^, start the spread spectrum function in microcell base station, S.^ is an offset, can be configured by microcell base station or webmaster node.
In embodiments of the present invention, spread spectrum function is started according to the measurement result of measurement wireless environment, in addition to the signal intensity according to cell, it can also be judged whether to start spread spectrum function according to signal quality, i.e. microcell base station measures the signal quality with frequency macrocell, if the signal quality of same frequency macrocell that measurement is obtained meets certain condition with the signal quality of the Microcell, then start the spread spectrum function in microcell base station, concrete methods of realizing is similar with startup spread spectrum function is judged whether according to signal intensity, for example, if the signal quality of the same frequency macrocell is higher than signal quality threshold value Qtesh, or be higher than with the signal quality of frequency macrocell
Qtesh- Q.During ^, start spread spectrum function, the Q in the microcell base stationteshThe value when signal quality of signal quality and Microcell for the same frequency macrocell is equal, the Q.ffsrtFor offset.
302:Inform that UE microcell base stations start spread spectrum function.
Microcell base station is started after spread spectrum function, and the information for representing to start spread spectrum function is sent to UE.
If saving the list for the UE for allowing to access the Microcell in microcell base station, Microcell can will directly represent that the information for starting spread spectrum function notifies to allow the UE of access to these.Represent that the information for starting spread spectrum function may further include instruction specific to which letter The signal in road is spread, the mark not spread to the signal of which channel.Signal i.e. for a channel or multiple channels whether carried out spread spectrum a mark can be used to indicate, for multiple channels signal whether carried out spread spectrum can also make respectively it is multiple indicate each channel is indicated.For example, indicate whether Physical Broadcast Channel is spread using a mark, either using a mark indicate that whether Physical Broadcast Channel and the signal of synchronizing channel have been carried out spreading or indicate respectively whether spread spectrum etc. has been carried out to Physical Broadcast Channel and the signal of synchronizing channel using two marks.
If not preserved in Microcell allows the UE lists of access, UE can be informed by other network nodes.For example, microcell base station can be started to the information bulletin UE of spread spectrum by the following method:
Network side passes through application layer protocol OMA (Open Mobile Alliance, Open Mobile Alliance）/ OTA (Over the air, over the air）DM (Device Management, equipment control）It will represent that the information for starting spread spectrum function is sent to the UE for allowing to access the Microcell.OMA/OTA therein is automatically configured is used as carrier to realize by short message, and OMA/OTA specifications are used for being packed UE parameters by specific form, and then forms specific short message sending to UE.If the UE of user supports OMA/OTA specifications, this special short message, i.e. configuration information will be changed into UE parameters by UE after validation.It therefore, it can be handed down to UE by short message mode after the information that microcell base station starts spread spectrum function is set according to OMA/OTA specifications, UE preserves the short message according to OMA/OTA format changes for UE parameters.
Or, when microcell base station starts spread spectrum function, notify the macrocell with covering, when UE enters and the Microcell is with the macrocell covered, macrocell will represent that Microcell starts the information of spread spectrum function and notifies UE, when UE is switched to the macrocell, or UE cell reselections are to carrying out in location registration procedure after the macrocell, core net MME (Management Entity, Mobility mobile management entities）Being issued to macro cell base station allows what the UE was accessed Microcell list.Macrocell can pass through dedicated signaling RRC (Radio Resource Control, wireless heterogeneous networks）Connection is set up, RRC connections the message such as reconfigure and issued.
In the present embodiment, after the information that mark is started to spread spectrum function is notified to UE, other nodes that can be in the cell base station or in network set a mark, the mark indicates, when restarting after spread spectrum function closing, to be not longer notified about for the UE for having notified to represent the information for starting spread spectrum function.
303:UE sets flag after receiving and representing that microcell base station starts the information of spread spectrum function.
UE is after receiving and representing the base station initiated information of spread spectrum function of micro- d, area, set and preserve the flag bit of the microcell base station, preserve the positional information of the microcell base station, represent that the signal that UE knows that the microcell base station is sent passes through spread processing, if later UE is received after the signal of microcell base station transmission, despreading processing is directly carried out.
304:Microcell base station sends the signal Jing Guo spread processing to UE.
Because microcell base station starts spread spectrum function, spread processing is carried out to the signal for needing to send and then sent.Microcell base station can be to SCH (Synchronization Channel, synchronizing channel）On signal and PBCH (Physical Broadcast Channel, Physical Broadcast Channel）On signal spread with spreading code, then the signal through spread spectrum is divided into the two-dimentional time frequency block of time and frequency and is transmitted.Or, microcell base station only can carry out spread processing to the signal on PBCH, and then the signal by spread spectrum is divided into the two-dimentional time frequency block of time and frequency and is transmitted.Or, microcell base station can be to the signal on PBCH and PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel）On signal spread, then will be divided into the two-dimentional time frequency block of time and frequency and be transmitted by the signal of spread spectrum.Or, microcell base station can be spread to the signal on PBCH, PDSCH and SCH, and then the signal by spread spectrum is divided into the two-dimentional time frequency block of time and frequency and is transmitted. 305:UE is de-spread to the signal of the process spread processing of reception.
For allowing UE to access and starting the microcell base station of spread spectrum function, the flag bit of the microcell base station is already provided with UE, know that the signal transmitted by the microcell base station have passed through spread processing, when UE enters the covering of the Microcell, for received signal, despreading processing is directly carried out.
If the signal of the process spread processing transmitted by microcell base station is the signal on signal and PBCH on SCH, first, UE receives signal in the time frequency block of default transmission synchronizing signal, and received signal is carried out with corresponding spreading code to de-spread the signal being transmitted, parse PCI (the Physical Cell Identity, Physical Cell Identifier of the microcell base station）, then, UE receives signal in the default time frequency block for sending main broadcast message, and received signal is de-spread with corresponding spreading code, reads main broadcast message.UE can parse the synchronizing channel after despreading and the signal of Physical Broadcast Channel.
If the signal of the process spread processing transmitted by microcell base station is only the signal on PBCH, UE is synchronized with microcell base station first, the method of despreading is not used to receive signal in synchronizing process, after UE and the microcell base station synchronization, UE receives the signal of Physical Broadcast Channel in default time frequency block.
If the signal on the signal and PDSCH on PBCH transmitted by microcell base station is the signal Jing Guo spread processing, then UE can be de-spread according to the channel for indicating to confirm to spread according to parameters such as corresponding spreading code and spreading factors.
If the signal on PBCH, SCH and PDSCH transmitted by microcell base station is the signal Jing Guo spread processing, UE can be according to the channel for indicating to confirm to spread, then de-spread according to parameters such as corresponding spreading code and spreading factors, SCH signals are de-spread first, the signal of PBCH and PDSCH channels de-spread again after synchronizing.
In the method that the present embodiment is provided, when being disposed in macrocell largely with frequency Microcell, decided whether to start the spread spectrum function in microcell base station according to wireless environment, work as microcell base station Start after spread spectrum function, will actively start spread spectrum information and inform allows to access the Microcell
UE, flexible signal transmitting method is provided for microcell base station, effectively eliminates in network Microcell and with the interference between frequency macrocell, meanwhile, high spectrum efficiency is maintained to the full extent, and there is provided peak rates business.
Reference picture 4, another embodiment of the present invention provides a kind of co-channel interference suppression method, in the present embodiment, and the microcell base station that UE is not received by network side transmission starts the information spread, and this method includes：
In step 401, microcell base station measurement wireless environment starts spread spectrum function, specifically, step 401, which is referred to step 301 in method shown in Fig. 3, realizes that here is omitted according to measurement result.
In step 402, microcell base station sends the signal Jing Guo spread processing to UE, specifically, step 402, which is referred to step 304 in method shown in Fig. 3, realizes that here is omitted.
403:UE is de-spread to the signal of the process spread processing of reception.
What UE was preserved according to itself allows the positional information of access Microcell, when entering Microcell, OFDM (Orthogonal Frequency Division Multiplexing, OFDM are carried out to the signal that the microcell base station received is sent）Demodulation, and start timer simultaneously.If the signal received is not by spread spectrum, UE can have not timed out in timer and be detected by the microcell base station；If received signal is spread by microcell base station, UE can not be detected by OFDM demodulation obtains the microcell base station.In the present embodiment, because UE received signals are spread by microcell base station, therefore, UE can not detect the microcell base station by OFDM demodulation, after when the timer times out, if UE starts despreading still without microcell base station, UE is demodulated, despreading processing is carried out to received signal.
The method provided according to the present embodiment, when being disposed in macrocell largely with frequency Microcell, decides whether to start the spread spectrum function in microcell base station according to wireless environment, works as microcell base station Start after spread spectrum function, spread processing is carried out to sent signal, flexible signal transmitting method is provided for microcell base station, simultaneously, UE by setting timer, when the timer times out after, that is, start despreading, despreading processing is carried out to the signal that receives, Microcell is effectively eliminated in network and with the interference between frequency macrocell.
Reference picture 5, an alternative embodiment of the invention provides a kind of communicator 500, including：
Start unit 510, for starting spread spectrum function according to the measurement result measured to same frequency macrocell；Processing unit 520, for carrying out spread processing to sent signal, and sends the signal through spread processing.
510 pairs of signal intensities with frequency macrocell of start unit are measured, if the signal intensity of same frequency macrocell that measurement is obtained meets certain condition with the signal intensity of communicator 500, start the spread spectrum function in the communicator 500.It is specifically as follows：Setting signal intensity threshold Stosh, the SteshIt can be configured by microcell base station or webmaster node, the StoshCan be same frequency macrocell signal intensity and Microcell signal intensity it is equal when value, when the signal intensity of same frequency macrocell that measurement is obtained is more than StoshWhen, it is determined that the signal intensity with frequency macrocell is higher than the signal intensity of Microcell, starts the spread spectrum function in microcell base station.Or, when the signal intensity for the same frequency macrocell that measurement is obtained is more than Stosh - SoffsetWhen, start the spread spectrum function in microcell base station, S.^ is an offset, can be configured by microcell base station or webmaster node.
In embodiments of the present invention, spread spectrum function is started according to the measurement result of measurement wireless environment, in addition to the signal intensity according to cell, it can also be judged whether to start spread spectrum function according to signal quality, concrete methods of realizing is similar with startup spread spectrum function is judged whether according to signal intensity, if for example, the signal quality of the same frequency macrocell is higher than signal quality threshold value Qtesh, or be higher than with the signal quality of frequency macrocell When, in the Microcell Start spread spectrum function, the Q in base stationteshThe value when signal quality of signal quality and Microcell for the same frequency macrocell is equal, the Q.ffsrtFor offset.
After the spread spectrum function that start unit 510 starts communicator 500,520 pairs of processing unit needs the signal sent sent after spread processing.Processing unit 520 can be spread to the signal on the signal and PBCH on SCH with spreading code, and then the signal through spread spectrum is divided into the two-dimensional video block of time and frequency and is transmitted；Or, spread processing only can be carried out to the signal on PBCH, then the signal by spread spectrum is divided into the two-dimentional time frequency block of time and frequency and is transmitted；Or, microcell base station can be spread to the signal on the signal and PDSCH on PBCH, and then the signal by spread spectrum is divided into the two-dimentional time frequency block of time and frequency and is transmitted.Or, microcell base station can be spread to the signal on PBCH, PDSCH and SCH, and then the signal by spread spectrum is divided into the two-dimentional time frequency block of time and frequency and is transmitted.
Communicator 500 can also include notification unit 530, for the information for representing to start spread spectrum function to be notified to user equipment.Start unit 510 is started after spread spectrum function, notification unit 530 sends the information for representing to start spread spectrum function to UE, represent that the information for starting spread spectrum function may further include and indicate that the specific signal to which channel is spread, the mark not spread to the signal of which channel.Signal i.e. for a channel or multiple channels whether carried out spread spectrum a mark can be used to indicate, for multiple channels signal whether carried out spread spectrum can also make respectively it is multiple indicate each channel is indicated.If saving the list for the UE for allowing to access the communicator in communicator 500, the information that mark directly can be started spread spectrum function by notification unit 503 notifies to allow the UE of access to these.If not preserved in communicator 500 allows the UE lists of access, UE can be informed by other network nodes.For example, cell base station can be started to the information bulletin UE of spread spectrum by the following method: Network side will represent that the information for starting spread spectrum function is sent to the UE for allowing to access the Microcell by application layer protocol OMA/OTA DM.OMA/OTA therein is automatically configured is used as carrier to realize by short message, and OMA/OTA specifications are used for being packed UE parameters by specific form, and then forms specific short message sending to UE.If the UE of user supports OMA/OTA specifications, this special short message, i.e. configuration information will be changed into UE parameters by UE after validation.It therefore, it can be handed down to UE by short message mode after the information that microcell base station starts spread spectrum function is set according to OMA/OTA specifications, UE preserves the short message according to OMA/OTA format changes for UE parameters.
Or, when start unit 510 starts spread spectrum function, notify the macrocell with covering, when UE enters and the Microcell is with the macrocell covered, macrocell will represent that Microcell starts the information notice UE of spread spectrum function, when UE is switched to the macrocell, or UE cell reselections, to carrying out in location registration procedure after the macrocell, core net MME issues the Microcell list for allowing the UE to access to macro cell base station.Macrocell can be set up by dedicated signaling RRC connections, RRC connections the message such as reconfigure and issue.
Reference picture 6, another embodiment of the present invention provides a kind of communicator 600, including：Receiving unit 610, the signal for receiving microcell base station transmission, the signal is started by the microcell base station carries out spread processing after spread spectrum function, the spread spectrum function according to the measurement result measured to same frequency macrocell by starting；
Processing unit 620, the signal received to receiving unit 610 carries out despreading processing.Communicator 600 enters the overlay area of microcell base station, and the microcell base station allows the communicator to access, and the microcell base station starts spread spectrum function, and spread processing is carried out to the signal of transmission.The receiving unit 610 of communicator 600 receives the signal for the process spread processing that microcell base station is sent.The signal that processing unit 620 is received to receiving unit 610 carries out despreading processing.If the signal of the process spread processing transmitted by microcell base station is the signal on signal and PBCH on SCH, time frequency block of the communicator 600 in default transmission synchronizing signal Middle reception signal, and received signal is carried out with corresponding spreading code to de-spread the signal being transmitted, parse the PCI of the microcell base station, then, signal is received in the default time frequency block for sending main broadcast message, and received signal is de-spread with corresponding spreading code, read main broadcast message.
If the signal of the process spread processing transmitted by microcell base station is only the signal on PBCH, communicator 600 is synchronized with microcell base station first, the method of despreading is not used to receive signal in synchronizing process, after with the microcell base station synchronization, the signal of Physical Broadcast Channel is received in default time frequency block.
If the signal on the signal and PDSCH on PBCH transmitted by microcell base station is the signal Jing Guo spread processing, communicator 600 confirms the channel of spread spectrum, then de-spread according to parameters such as corresponding spreading code and spreading factors.
If the signal on PBCH, SCH and PDSCH that microcell base station is sent is the signal Jing Guo spread processing, communicator 600 confirms the channel of spread spectrum, then just the parameter such as the corresponding spreading code of blunt evidence and spreading factor is de-spread, SCH signals are de-spread first, the signal of PBCH and PDSCH channels de-spread again after synchronizing.
Receiving unit 610 is additionally operable to receive the information for representing that the microcell base station starts spread spectrum function, represent that the information for starting spread spectrum function may further include and indicate that the specific signal to which channel is spread, the mark not spread to the signal of which channel.Signal i.e. for a channel or multiple channels whether carried out spread spectrum a mark can be used to indicate, for multiple channels signal whether carried out spread spectrum can also make respectively it is multiple indicate each channel is indicated；The communicator 600 can also include mark setting unit 630, for receiving obtained information according to receiving unit 610, mark is set, the mark indicates that the microcell base station starts spread spectrum function, due to being provided with the mark for indicating that microcell base station starts spread spectrum function in communicator 600, then when the communicator 600 enters the Microcell During the scope of covering, despreading processing can be directly carried out to the signal that the Microcell received is sent.
Communicator 600 can also include timer setting unit 640, for setting timer；If processing unit 620 is not detected by the microcell base station after being used for the timer expiry, despreading processing is carried out to the signal.What communicator 600 was preserved according to itself allows the positional information of access Microcell, when entering Microcell, OFDM demodulation is carried out to the signal that the microcell base station received is sent, start timer simultaneously, if the signal received is not by spread spectrum, communicator 600 can have not timed out in timer and be detected by the microcell base station；If received signal is spread by microcell base station, communicator 600 can not be detected by OFDM demodulation obtains the microcell base station.In the present embodiment, because the received signal of receiving unit 610 is spread by microcell base station, therefore, communicator 600 can not detect the microcell base station by OFDM demodulation, after when the timer times out, if still without microcell base station is demodulated, processing unit 620 is de-spread, and despreading processing is carried out to received signal.
The method provided according to the present embodiment, when being disposed in macrocell largely with frequency Microcell, decided whether to start the spread spectrum function in microcell base station according to wireless environment, after microcell base station starts spread spectrum function, spread processing is carried out to sent signal, flexible signal transmitting method is provided for microcell base station.
Those skilled in the art will be further appreciated that, the unit and algorithm steps of each example of embodiment description with reference to disclosed in present specification, it can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate the interchangeability of hardware and software, the composition and step of each example are generally described according to function in the above description.The step of method or algorithm for being described with reference to the embodiments described herein, can be implemented with hardware, the software module of computing device, or the combination of the two.Software module can be placed in random access memory（RAM), internal memory, read-only storage（ROM), electrically programmable ROM, electric erasable In programming ROM, register, hard disk, moveable magnetic disc, CD-ROM, or any other form of storage medium.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention etc., should be included in the scope of the protection.

Claims (1)

  1. Claims
    1st, a kind of co-channel interference suppression method, it is characterised in that including：
    The measurement result that just blunt evidence is measured to same frequency macrocell, starts spread spectrum function；Signal to be sent is subjected to spread processing, the signal through spread processing is sent.
    2nd, according to the method described in claim 1, it is characterised in that described to include signal progress spread processing to be sent：
    Spread processing is carried out to the signal of Physical Broadcast Channel；Or,
    The signal of signal and Physical Broadcast Channel to synchronizing channel carries out spread processing；Or, the signal of signal and Physical Downlink Shared Channel to Physical Broadcast Channel carries out spread processing；Or,
    The signal of signal, synchronizing channel to Physical Broadcast Channel and the signal of Physical Downlink Shared Channel carry out spread processing.
    3rd, method according to claim 1 or 2, it is characterised in that this method also includes：The information for representing to start spread spectrum function is notified to user equipment.
    4th, method according to claim 3, it is characterised in that the information that the expression starts spread spectrum function includes the mark for indicating whether to carry out the signal of channel spread processing, including：For a channel or multiple channels signal whether carried out spread spectrum a mark can be used to indicate；Or, individually indicated respectively with whether multiple marks have carried out spread spectrum to the signal of multiple channels.
    5th, method according to claim 3, it is characterised in that described to notify to include to user equipment by the information for representing to start spread spectrum function：
    Microcell base station will represent that the information that the microcell base station starts spread spectrum function is notified to the user equipment；Or,
    The information for representing to start spread spectrum function is notified to the user equipment by application layer protocol；Or, Represent that the information for starting spread spectrum function notifies the macrocell with covering by described, the macrocell notifies the information for representing to start spread spectrum function to the user equipment.
    6th, method according to claim 1 or 2, it is characterised in that the measurement result that the basis is measured to same frequency macrocell, starts spread spectrum function, including：
    If the signal intensity of the same frequency macrocell is higher than signal strength threshold value Stesh, or with frequency macrocell signal intensity be higher than Stesh - SoffsetWhen, start spread spectrum function, the S in the microcell base stationthreshThe value when signal intensity of signal intensity and Microcell for the same frequency macrocell is equal, the S.^ is offset；Or,
    If the signal quality of the same frequency macrocell is higher than signal quality threshold value Qtosh, or with frequency macrocell signal quality be higher than Qthresh - QoffsetWhen, start spread spectrum function, the Q in the microcell base stationtoshThe value when signal quality of signal quality and Microcell for the same frequency macrocell is equal, the Q.^ is offset.
    7th, method according to claim 3, it is characterized in that, it is described to notify the information for representing to start spread spectrum function to after user equipment, mark is set, the mark is indicated after restarting spread spectrum next time, for being notified of the user equipment for representing to start the information of spread spectrum function, do not notify to represent the information for being again started up spread spectrum function.
    8th, a kind of co-channel interference suppression method, it is characterised in that including：
    The signal that microcell base station is sent is received, the signal carries out spread processing after microcell base station startup spread spectrum function；The spread spectrum function according to the measurement result measured to same frequency macrocell by starting；
    Despreading processing is carried out to the signal received.
    9th, method according to claim 8, it is characterised in that the signal of the process spread processing includes：The signal of synchronizing channel and the signal of Physical Broadcast Channel；
    Or, the signal of the process spread processing includes：The signal of Physical Broadcast Channel； Or, the signal of the process spread processing includes：The signal of Physical Broadcast Channel and the signal of Physical Downlink Shared Channel；
    Or, the signal of the process spread processing includes：The signal of the signal of Physical Broadcast Channel, the signal of synchronizing channel and Physical Broadcast Channel.
    10th, method according to claim 8 or claim 9, it is characterised in that this method also includes：
    Receive and represent the base station initiated information of spread spectrum function of micro- d, area；
    Set and identified according to described information, the mark indicates that the microcell base station starts spread spectrum function.
    11st, method according to claim 8 or claim 9, it is characterised in that this method also includes：
    Timer is set；
    It is described that the signal progress despreading processing received is included：
    If being not detected by the microcell base station after the timer expiry, despreading processing is carried out to the signal.
    12nd, a kind of communicator, it is characterised in that including：
    Start unit, for starting spread spectrum function according to the measurement result measured to same frequency macrocell；
    Processing unit, for carrying out spread processing to sent signal, and sends the signal through spread processing.
    13rd, communicator according to claim 12, it is characterised in that the processing unit is used to carry out spread processing to the signal of synchronizing channel and the signal of Physical Broadcast Channel；Or, spread processing is carried out to the signal of Physical Broadcast Channel；Or, spread processing is carried out to the signal of Physical Broadcast Channel and Physical Downlink Shared Channel；Or, spread processing is carried out to the signal of Physical Broadcast Channel, synchronizing channel and Physical Downlink Shared Channel. 14th, the communicator according to claim 12 or 13, it is characterised in that also include：
    Notification unit, for the information for representing to start spread spectrum function to be notified to user equipment.
    15th, a kind of communication equipment, it is characterised in that including：
    Receiving unit, the signal for receiving microcell base station transmission, the signal is started by the microcell base station carries out spread processing after spread spectrum function, the spread spectrum function according to the measurement result measured to same frequency macrocell by starting；
    Processing unit, the signal received to the receiving unit carries out despreading processing.
    16th, communicator according to claim 15, it is characterised in that the receiving unit is additionally operable to receive the information for representing that the microcell base station starts spread spectrum function；
    The communicator also includes mark setting unit, is identified for being set according to described information, and the mark indicates that the microcell base station starts spread spectrum function.
    17th, communicator according to claim 15, it is characterised in that also include：Timer setting unit, for setting timer；
    If the processing unit is not detected by the microcell base station after being used for the timer expiry, despreading processing is carried out to the signal.
CN200980000121.3A 2009-05-13 2009-05-13 Co-channel interference suppression method and device Active CN102318195B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107167772A (en) * 2017-05-09 2017-09-15 成都锦江电子系统工程有限公司 A kind of phase code eliminates co-channel interference method and system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2869636B1 (en) 2012-08-10 2020-03-18 Huawei Technologies Co., Ltd. Mobility control method and device
CN103117757B (en) * 2013-01-21 2016-08-03 华为技术有限公司 A kind of signal acceptance method and terminal

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1196843A (en) * 1995-08-01 1998-10-21 西门子公司 Process and device for reducing common channel interference in cellular JD-CDMA radio system
CN1518253A (en) * 2003-01-15 2004-08-04 华为技术有限公司 Orthogonal frequency division multiplexing modem device and method
CN1787416A (en) * 2004-12-08 2006-06-14 大唐移动通信设备有限公司 Distribution method for channelizing code of CDMA system
CN1909413A (en) * 2005-08-02 2007-02-07 上海原动力通信科技有限公司 Method for transmitting variable-speed data in time slot CDMA cellular system
US20080187065A1 (en) * 2007-02-06 2008-08-07 Inha-Industry Partnership Institute System and Method for Co-Channel Interference Cancellation in Cellular OFDM Systems
CN101272603A (en) * 2007-03-19 2008-09-24 华为技术有限公司 Method and equipment for terminal measuring limited network community

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1196843A (en) * 1995-08-01 1998-10-21 西门子公司 Process and device for reducing common channel interference in cellular JD-CDMA radio system
CN1518253A (en) * 2003-01-15 2004-08-04 华为技术有限公司 Orthogonal frequency division multiplexing modem device and method
CN1787416A (en) * 2004-12-08 2006-06-14 大唐移动通信设备有限公司 Distribution method for channelizing code of CDMA system
CN1909413A (en) * 2005-08-02 2007-02-07 上海原动力通信科技有限公司 Method for transmitting variable-speed data in time slot CDMA cellular system
US20080187065A1 (en) * 2007-02-06 2008-08-07 Inha-Industry Partnership Institute System and Method for Co-Channel Interference Cancellation in Cellular OFDM Systems
CN101272603A (en) * 2007-03-19 2008-09-24 华为技术有限公司 Method and equipment for terminal measuring limited network community

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107167772A (en) * 2017-05-09 2017-09-15 成都锦江电子系统工程有限公司 A kind of phase code eliminates co-channel interference method and system

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