CN103703692B

CN103703692B - Method and device of self-adaptive interference cancellation

Info

Publication number: CN103703692B
Application number: CN201380001342.9A
Authority: CN
Inventors: 祁华礼; 潘永朝
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-09-13
Filing date: 2013-09-13
Publication date: 2015-06-10
Anticipated expiration: 2033-09-13
Also published as: WO2015035612A1; CN103703692A

Abstract

The invention discloses a method and a device of self-adaptive interference cancellation for solving inter-device interference cancellation signal processing IC benefit incomplete question, so as to enhance system gain. The present invention comprises: according to a interference cancellation capacity of a first signal processing device and a second signal processing device in a same uplink receiving resource group, a interference cancellation mode is adaptively selected between the first signal processing device and the second signal processing device, the interference cancellation capability comprises a demodulation interference cancellation, or a decoding interference cancellation, or a non-support interference cancellation; according to the interference cancellation mode, the interference cancellation processing mode is determined between the first signal processing device and the second signal processing device, so that the first signal processing device and the second signal processing device according to the interference cancellation processing mode is used for interference cancellation to a received signal.

Description

Method and device for self-adaptive interference cancellation

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for adaptive interference cancellation.

Background

Interference Cancellation (IC) is a kind of Multi-user Detection (MUD) technique, and its principle is that different user signals independently estimate locally generated multiple access Interference (e.g. by decision and reconstruction), so as to subtract part or all of the Interference for the user signal from the received signal. Interference cancellation can be performed without obtaining a correlation matrix, can be well expanded without increasing too much calculation amount, and can improve the receiving performance of users to weak power signals, so that the third generation mobile communication system prefers an interference cancellation method. Based on the difference of the sources of the reconstruction information, the ICs can be divided into a demodulation IC based on the information before decoding for reconstruction and a decoding IC based on the information after decoding for reconstruction.

In a scenario where a plurality of signal processing devices (e.g., nodebs side receivers) are configured, when a user terminal in a cell is accessed, the user terminal is generally accessed to different signal processing devices according to a certain criterion. The data information can be mutually cancelled at the time delay point of one-time or multiple-time cancellation completion of the signal processing equipment through the data channel between the signal processing equipment, so that users in different signal processing equipment can mutually enjoy cancellation gain. Because the IC capabilities of different signal processing devices are different, the delay points of one or more cancellation operations are not consistent, and therefore, it is not possible to enjoy complete cancellation gains between signal processing devices, for example, a signal processing device supporting demodulation IC, the processing of reconstruction cancellation may support slot level processing, a signal processing device supporting decoding IC, the processing of reconstruction cancellation may support subframe level processing, and the delay points of signal cancellation completion in different signal processing devices may not be aligned, and therefore, users in different signal processing devices may not fully enjoy cancellation gains.

For example, when a signal processing device supporting demodulation ICs and a signal processing device supporting decoding ICs are configured in an uplink receiving resource group at the same time, data before cancellation or after cancellation on the signal processing device supporting demodulation ICs are buffered for a certain time, or the signal processing device supporting decoding ICs is backed back to only support demodulation ICs, so that different signal processing devices exchange data after cancellation is completed for one or more times, and therefore it is ensured that ICs between signal processing devices are completely benefited.

However, if the user data in the signal processing device supporting the demodulation IC is buffered, a larger data processing delay may be caused, and at the same time, more buffer resources are consumed; if the signal processing device supporting the decoding IC is backed off to only support the demodulation IC, the gain of decoding cancellation cannot be reflected. Both of the above two processing methods can cause the IC gain not to be completely reflected, and affect the system capacity.

Disclosure of Invention

The embodiment of the invention provides a method and a device for self-adaptive interference cancellation, which are used for solving the problem of incomplete benefit of an interference cancellation IC between signal processing equipment, thereby improving the system gain.

In view of the above, a first aspect of the present invention provides a method for adaptive interference cancellation, which may include:

adaptively selecting an interference cancellation mode between first signal processing equipment and second signal processing equipment according to interference cancellation capabilities of the first signal processing equipment and the second signal processing equipment in the same uplink receiving resource group, wherein the interference cancellation capabilities comprise: demodulation interference cancellation, or decoding interference cancellation, or not supporting interference cancellation;

and determining the interference cancellation processing modes of the first signal processing device and the second signal processing device according to the interference cancellation mode, so that the first signal processing device and the second signal processing device perform interference cancellation on the received signal according to the interference cancellation processing modes.

In a first possible implementation manner of the first aspect, the adaptively selecting an interference cancellation mode between the first signal processing apparatus and the second signal processing apparatus includes:

if the highest interference cancellation capabilities of the first signal processing device and the second signal processing device in the same uplink receiving resource group both support decoding interference cancellation, determining that an interference cancellation mode between the first signal processing device and the second signal processing device is a decoding interference cancellation mode; or,

and if the highest interference cancellation capabilities of the first signal processing device and the second signal processing device in the same uplink receiving resource group both support demodulation interference cancellation, determining that an interference cancellation mode between the first signal processing device and the second signal processing device is a demodulation interference cancellation mode.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner, the adaptively selecting an interference cancellation mode between the first signal processing apparatus and the second signal processing apparatus further includes:

if the interference cancellation capabilities of the first signal processing device and the second signal processing device in the same uplink receiving resource group are different, and the interference cancellation capability of the first signal processing device supports decoding interference cancellation, determining that an interference cancellation mode between the first signal processing device and the second signal processing device is a mixed interference cancellation mode which firstly performs demodulation interference cancellation and then performs decoding interference cancellation;

or, if the interference cancellation capabilities of the first signal processing device and the second signal processing device in the same uplink receiving resource group are different, the interference cancellation capability of the first signal processing device is to support demodulation interference cancellation, and the interference pair energy dissipation level of the first signal processing device is higher than that of the second signal processing device, determining that the interference cancellation mode between the first signal processing device and the second signal processing device is a demodulation interference cancellation mode.

A second aspect of the present invention provides an apparatus for adaptive interference cancellation, which may include:

a first determining module, configured to adaptively select an interference cancellation mode between a first signal processing device and a second signal processing device according to interference cancellation capabilities of the first signal processing device and the second signal processing device in a same uplink receiving resource group, where the interference cancellation capabilities include: demodulation interference cancellation, or decoding interference cancellation, or not supporting interference cancellation;

a second determining module, configured to determine, according to the interference cancellation mode, interference cancellation processing manners of the first signal processing device and the second signal processing device, so that the first signal processing device and the second signal processing device perform interference cancellation on the received signal according to the interference cancellation processing manners.

In a first possible implementation manner of the second aspect, the first determining module is configured to:

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, the first determining module is further configured to:

A third aspect of the present invention provides an apparatus for adaptive interference cancellation, which may include a processor, at least one network interface, a memory, and at least one communication bus, the processor performing the steps of:

adaptively selecting an interference cancellation mode between first signal processing equipment and second signal processing equipment according to interference cancellation capabilities of the first signal processing equipment and the second signal processing equipment in the same uplink receiving resource group, wherein the interference cancellation capabilities comprise: demodulation interference cancellation, or decoding interference cancellation, or not supporting interference cancellation; and determining the interference cancellation processing modes of the first signal processing device and the second signal processing device according to the interference cancellation mode, so that the first signal processing device and the second signal processing device perform interference cancellation on the received signal according to the interference cancellation processing modes.

In a first possible implementation manner of the third aspect, the processor is configured to adaptively select an interference cancellation mode between the first signal processing apparatus and the second signal processing apparatus, and includes:

With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner, the processor is configured to adaptively select an interference cancellation mode between the first signal processing apparatus and the second signal processing apparatus, and further includes:

It can be seen from the foregoing technical solutions that the method and apparatus for adaptive interference cancellation provided in the embodiments of the present invention have the following advantages: self-adaptively selecting an interference cancellation mode among the signal processing devices according to the energy dissipation capacity of the interference pair of the signal processing devices, and determining an interference cancellation processing mode corresponding to each signal processing device, so that the self-adaptive selection of the interference cancellation mode among the signal processing devices is realized, and the incomplete benefit of the interference cancellation among the signal processing devices is avoided; furthermore, the interference cancellation processing mode comprises a mixed interference cancellation processing mode of firstly demodulating interference cancellation and then decoding interference cancellation, and on the premise of ensuring the mutual benefit of the interference cancellation ICs among the signal processing equipment, the interference cancellation capability of the signal processing equipment is utilized to the highest degree, so that the system gain is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic flowchart of a method for adaptive interference cancellation according to an embodiment of the present invention;

fig. 2 is another flowchart of a method for adaptive interference cancellation according to an embodiment of the present invention;

fig. 3 is a schematic view of an interference cancellation scenario of the adaptive interference cancellation method according to the embodiment of the present invention;

fig. 4 is a schematic diagram of another interference cancellation scenario of the adaptive interference cancellation method according to the embodiment of the present invention;

fig. 5 is a schematic structural diagram of an apparatus for adaptive interference cancellation according to an embodiment of the present invention;

fig. 6 is another schematic structural diagram of an apparatus for adaptive interference cancellation according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The method and the device of the embodiment of the invention can be applied to wireless communication network equipment such as a base station and the like. The following are detailed below.

Referring to fig. 1, fig. 1 is a schematic flowchart illustrating a method for adaptive interference cancellation according to an embodiment of the present invention, where the method includes:

s101, adaptively selecting an interference cancellation mode between first signal processing equipment and second signal processing equipment according to interference cancellation capabilities of the first signal processing equipment and the second signal processing equipment in the same uplink receiving resource group;

it should be understood that, the same uplink receiving resource group includes more than two signal processing apparatuses, and the first signal processing apparatus and the second signal processing apparatus are two of the more than two signal processing apparatuses, which are only for convenience of describing the interference cancellation process between two signal processing apparatuses in the same uplink receiving resource group, but do not constitute a limitation to the present invention.

In this embodiment of the present invention, the interference cancellation capability of the first signal processing apparatus and the second signal processing apparatus may be one of supporting decoding interference cancellation, supporting only demodulation pair cancellation, and not supporting interference cancellation. It is to be understood that the signal processing apparatus supporting decoding interference cancellation may support demodulation interference cancellation, and therefore, compared with the above interference cancellation capability, the signal processing apparatus supporting decoding interference cancellation is higher than the signal processing apparatus supporting only demodulation cancellation, and the signal processing apparatus supporting decoding interference cancellation is higher than the signal processing apparatus supporting no demodulation interference cancellation.

In this embodiment of the present invention, the interference cancellation mode between the first signal processing device and the second signal processing device may be: the interference cancellation is performed between signal processing devices supporting decoding interference cancellation, or the interference cancellation is performed between signal processing devices supporting only demodulation interference cancellation, or the interference cancellation is performed between a signal processing device supporting only demodulation interference cancellation and a signal processing device supporting decoding interference cancellation, or the interference cancellation is performed between a signal processing device not supporting interference cancellation and a signal processing device supporting decoding interference cancellation, which is not specifically limited herein.

S102, determining an interference cancellation processing mode of the first signal processing device and the second signal processing device according to the interference cancellation mode, so that the first signal processing device and the second signal processing device perform interference cancellation on the received signal according to the interference cancellation processing mode.

As can be seen from the foregoing, in the method for adaptive interference cancellation provided in the embodiment of the present invention, the interference cancellation mode between the signal processing devices is adaptively selected according to the energy dissipation capability of the interference pair of the signal processing devices, and the interference cancellation processing mode corresponding to each signal processing device is determined, so that the adaptive selection of the interference cancellation mode between the signal processing devices is realized, and the benefit of the interference cancellation between the signal processing devices is not complete.

Referring to fig. 2, fig. 2 is another schematic flow chart of a method for adaptive interference cancellation according to an embodiment of the present invention, where the method includes:

s201, determining the interference cancellation capability of a first signal processing device and a second signal processing device in the same uplink receiving resource group;

S202, adaptively selecting an interference cancellation mode between the first signal processing device and the second signal processing device according to the interference cancellation capabilities of the first signal processing device and the second signal processing device;

the interference cancellation capability may be one of supporting decoding interference cancellation, only supporting demodulation pair cancellation, and not supporting interference cancellation; it is to be understood that the signal processing apparatus supporting decoding interference cancellation may support demodulation interference cancellation, and therefore, compared with the above interference cancellation capability, the signal processing apparatus supporting decoding interference cancellation is higher than the signal processing apparatus supporting only demodulation cancellation, and the signal processing apparatus supporting decoding interference cancellation is higher than the signal processing apparatus supporting no demodulation interference cancellation.

In this embodiment of the present invention, the interference cancellation scheme between the first signal processing device and the second signal processing device may be: the interference cancellation is performed between signal processing devices supporting decoding interference cancellation, or the interference cancellation is performed between signal processing devices supporting only demodulation interference cancellation, or the interference cancellation is performed between a signal processing device supporting only demodulation interference cancellation and a signal processing device supporting decoding interference cancellation, or the interference cancellation is performed between a signal processing device not supporting interference cancellation and a signal processing device supporting decoding interference cancellation, which is not specifically limited herein.

In this embodiment of the present invention, when the interference cancellation capability of the signal processing apparatus (i.e. the first signal processing apparatus and the second signal processing apparatus) is to support decoding interference cancellation, the interference cancellation processing mode of the signal processing apparatus includes at least one of the following: a processing mode supporting at least one decoding interference cancellation, a processing mode supporting at least one demodulation interference cancellation and a mixed processing mode supporting firstly demodulation interference cancellation and then decoding interference cancellation; when the interference cancellation capability of the signal processing equipment only supports demodulation interference cancellation, the interference cancellation processing mode of the signal processing equipment supports at least one demodulation interference cancellation but does not support decoding interference cancellation; when the interference cancellation capability of the signal processing equipment does not support interference cancellation, the signal processing equipment does not support decoding interference cancellation or demodulation interference cancellation.

Preferably, the adaptively selecting the interference cancellation mode between the first signal processing device and the second signal processing device may specifically include the following two cases:

a1, the interference cancellation capabilities of the first signal processing device and the second signal processing device in the same uplink receiving resource group are the same:

determining an interference cancellation mode between the first signal processing device and the second signal processing device as an interference cancellation mode supporting a highest interference cancellation capability;

that is, if the interference cancellation capabilities supported by the first signal processing apparatus and the second signal processing apparatus are the same (i.e. the highest interference cancellation capabilities are both demodulation interference cancellation or both decoding interference cancellation), the interference cancellation mode between the first signal processing apparatus and the second signal processing apparatus is configured to be the highest interference cancellation capability, and the first signal processing apparatus and the second signal processing apparatus exchange data at the same delay point;

if the highest interference cancellation capabilities of the first signal processing device and the second signal processing device in the same uplink receiving resource group both support decoding interference cancellation, determining that an interference cancellation mode between the first signal processing device and the second signal processing device is a decoding interference cancellation mode;

and if the highest interference cancellation capabilities of the first signal processing equipment and the second signal processing equipment in the same uplink receiving resource group both support demodulation interference cancellation, determining that the interference cancellation mode between the first signal processing equipment and the second signal processing equipment is a demodulation interference cancellation mode.

A2, the interference cancellation capability of the first signal processing device and the second signal processing device in the same uplink receiving resource group is different:

if the interference cancellation capability of the first signal processing equipment supports decoding interference cancellation, determining that an interference cancellation mode between the first signal processing equipment and the second signal processing equipment is a mixed interference cancellation mode which firstly performs demodulation interference cancellation and then performs decoding interference cancellation;

that is, two cases may be included:

if the highest interference cancellation capability of a first signal processing device (or a second signal processing device) in the same uplink receiving resource group is demodulation interference cancellation and the highest interference cancellation capability of the second signal processing device (or the first signal processing device) is decoding interference cancellation, determining an interference cancellation mode among the signal processing devices as a mixed interference cancellation mode which firstly performs demodulation interference cancellation and then performs decoding interference cancellation; or, if the highest interference cancellation capability of the first signal processing device (or the second signal processing device) in the same uplink receiving resource group is decoding interference cancellation, and the second signal processing device (or the first signal processing device) does not support interference cancellation, determining that the interference cancellation mode among the signal processing devices is a hybrid interference cancellation mode which firstly performs demodulation interference cancellation and then performs decoding interference cancellation;

That is to say, if the highest interference cancellation capability of the first signal processing apparatus (or the second signal processing apparatus) in the same uplink receiving resource group is demodulation interference cancellation, and the second signal processing apparatus (or the first signal processing apparatus) does not support interference cancellation, it is determined that the interference cancellation mode between the first signal processing apparatus and the second signal processing apparatus is a demodulation interference cancellation mode.

In summary of the two cases a1 and a2, if the signal processing apparatuses supporting interference cancellation have different highest interference cancellation capabilities and include a signal processing apparatus supporting decoding interference cancellation, it is determined that the interference cancellation mode between the signal processing apparatuses is a hybrid interference cancellation mode in which demodulation cancellation is performed first and then decoding cancellation is performed, and thus, the inter-board cancellation mode performs interference cancellation for the signal processing apparatus supporting demodulation interference cancellation and the signal processing apparatus supporting decoding interference cancellation, users between the signal processing apparatuses can enjoy demodulation interference cancellation gains mutually, and users in the signal processing apparatus having decoding interference cancellation capabilities can enjoy decoding interference cancellation gains mutually. The signal processing equipment configures user interference cancellation attributes (configures users to perform demodulation interference cancellation or decoding interference cancellation) based on the indication information of the inter-signal processing equipment interference cancellation mode self-adaptive module, and performs data information cancellation alternately through the channels between the signal processing equipment at defined delay time. Similarly, if the inter-board cancellation mode is to perform interference cancellation for signal processing devices that all support demodulation interference cancellation, users between the signal processing devices can enjoy demodulation interference cancellation gains, and the signal processing device configures user interference cancellation attributes (configures users to perform demodulation interference cancellation) based on the indication information of the inter-signal processing device interference cancellation mode adaptive module.

It can be understood that, for a signal processing apparatus that does not support interference cancellation, its input signal comes from a residual signal after performing centralized cancellation by the signal processing apparatus that supports interference cancellation, and then based on the residual signal, user information accessing the processing apparatus is detected.

S203, determining an interference cancellation processing mode of the first signal processing device and the second signal processing device according to the interference cancellation mode, so that the first signal processing device and the second signal processing device perform interference cancellation on the received signal according to the interference cancellation processing mode.

It should be noted that, if the interference cancellation capability of the first signal processing apparatus can support decoding interference cancellation, the interference cancellation processing method of the first signal processing apparatus includes: a processing mode supporting at least one decoding interference cancellation, a processing mode supporting at least one demodulation interference cancellation, and a mixed processing mode supporting demodulation interference cancellation first and then decoding interference cancellation, so that the first signal processing device determines the processing mode according to the currently determined interference cancellation mode; if the interference cancellation capability of the second signal processing device performing interference cancellation with the first signal processing device can support demodulation interference cancellation, the interference cancellation mode between the first signal processing device and the second signal processing device is hybrid interference cancellation which firstly performs demodulation interference cancellation and then performs decoding interference cancellation, the first signal processing device determines the processing mode of the interference cancellation as hybrid interference cancellation according to the interference cancellation mode and the capability of the first signal processing device, and the second signal processing device determines the processing mode of the interference cancellation as demodulation interference cancellation according to the interference cancellation mode and the capability of the second signal processing device.

As can be seen from the above, in the method for adaptive interference cancellation provided in the embodiment of the present invention, the interference cancellation mode between the signal processing devices is adaptively selected according to the energy dissipation capability of the interference pair of the signal processing devices, and the interference cancellation processing mode corresponding to each signal processing device is determined, so that the adaptive selection of the interference cancellation mode between the signal processing devices is realized, and the benefit of the interference cancellation between the signal processing devices is not complete; furthermore, the interference cancellation mode comprises a hybrid interference cancellation mode which firstly performs demodulation interference cancellation and then performs decoding interference cancellation, and the interference cancellation capability of the signal processing equipment is utilized to the highest degree on the premise of ensuring the mutual benefits of the interference cancellation among the signal processing equipment, so that the system gain is improved.

In order to better understand the technical solution of the present invention, the following describes the method for adaptive interference cancellation in detail by taking a specific application scenario as an example;

in an application scenario, the interference cancellation capabilities of the first signal processing device and the second signal processing device in the same uplink receiving resource group are the same, and if both the first signal processing device and the second signal processing device support decoding interference cancellation, that is, the inter-board cancellation mode can be understood as interference cancellation performed between the signal processing device supporting decoding interference cancellation and the signal processing device supporting decoding interference cancellation; referring to fig. 3, fig. 3 is a schematic view of an interference cancellation scenario of a self-adaptive interference cancellation method according to an embodiment of the present invention;

firstly, configuring an IC mode according to the interference cancellation capability of a first signal processing device and a second signal processing device, wherein 1 is IC mode indication information, and then executing data flow according to the sequence of 2 to 4; wherein, 2 is all users receiving signals, 3 is reconstruction signals of access users in the signal processing equipment, and 4 is signals after centralized cancellation. In this embodiment, the interference cancellation mode between the first signal processing device and the second signal processing device is decoding interference cancellation, and the signal processing devices exchange data at the same delay point.

Specifically, as shown in fig. 3, the first signal processing device and the second signal processing device are both signal processing devices supporting decoding ICs, and the first signal processing device and the second signal processing device respectively analyze a part of the user received signal, where the user in the first signal processing device and the user in the second signal processing device are mutually interfered. After the first signal processing device and the second signal processing device analyze the information of the IC user (part of users or all users), the signal of the IC user is restored back to obtain a reconstructed signal 3, the reconstructed signal 3 is obtained by processing such as coding, modulation, spread spectrum scrambling and the like, then the reconstructed signal 3 in the first signal processing device and the second signal processing device is subtracted from the original signal, and the subtracted signal is returned to the first signal processing device and the second signal processing device for re-detection, wherein the subtracted signal (i.e. the signal 4 after centralized cancellation) can contain residual information of the IC user, and for other users, the process can be considered to eliminate the interference of the IC user.

In another application scenario, all signal processing devices in the same uplink receiving resource group have different interference cancellation capabilities, including a signal processing device supporting decoding interference cancellation and a signal processing device not supporting decoding interference cancellation, for example, it can be understood that an inter-board cancellation mode is to perform interference cancellation between a signal processing device supporting decoding interference cancellation and a signal processing device only supporting demodulation interference cancellation; referring to fig. 4, fig. 4 is a schematic diagram of another interference cancellation scenario of the adaptive interference cancellation method according to the embodiment of the present invention;

firstly, similarly, configuring an IC mode according to the interference cancellation capability of a first signal processing device and a second signal processing device, wherein 1 is IC mode indication information, and then executing data flow according to the sequence of 2 to 4; wherein, 2 is all users receiving signals, 3 is reconstruction signals of access users in the signal processing equipment, and 4 is signals after centralized cancellation. In the embodiment, the interference cancellation mode between the first signal processing device and the second signal processing device is a mixed mode of firstly performing demodulation interference cancellation and then performing decoding interference cancellation, users between the signal processing devices can enjoy demodulation interference cancellation gains mutually, and users in the signal processing devices with the decoding interference cancellation capabilities can enjoy the decoding interference cancellation gains mutually.

Specifically, as shown in fig. 4, the first signal processing device is a signal processing device supporting a demodulation IC, the second signal processing device is a signal processing device supporting a decoding IC, and the first signal processing device and the second signal processing device respectively analyze a part of the user received signal, where the user in the first signal processing device and the user in the second signal processing device have interference with each other. After the first signal processing device and the second signal processing device analyze the information of the IC user (part of users or all users), the signal of the IC user is restored back to obtain a reconstructed signal 3, the reconstructed signal 3 is obtained by processing such as coding, modulation, spread spectrum scrambling and the like, then the reconstructed signal 3 in the first signal processing device and the second signal processing device is subtracted from the original signal, and the subtracted signal is returned to the first signal processing device and the second signal processing device for re-detection, wherein the subtracted signal (i.e. the signal 4 after centralized cancellation) can contain residual information of the IC user, and for other users, the process can be considered to eliminate the interference of the IC user.

It should be understood that, the embodiment of the present invention only describes the adaptive interference cancellation method by taking the above application scenarios as an example, but does not limit the present invention.

As can be seen from the above application scenario, the first signal processing device and the second signal processing device configure the user interference cancellation attribute (configure the user to perform demodulation interference cancellation or decoding interference cancellation) based on the indication information of the inter-signal processing device interference cancellation mode adaptive module, and exchange the cancellation data information through the inter-signal processing device channel at the defined delay time. For the signal processing equipment supporting the decoding interference cancellation capability, a mixed interference cancellation processing mode of firstly carrying out demodulation interference cancellation and then carrying out decoding interference cancellation is supported, and the interference cancellation mode among the signal processing equipment is selected in a self-adaptive mode, namely the interference cancellation mode among the signal processing equipment is configured in a self-adaptive mode according to the interference pair energy dissipation capacity of the signal processing equipment, so that the interference cancellation processing mode of the signal processing equipment is determined. On the premise of ensuring the mutual benefit of the interference cancellation among the signal processing devices, the interference cancellation capability of the signal processing devices is utilized to the maximum, so that the system gain is improved.

In order to better implement the method for adaptive interference cancellation provided by the embodiment of the present invention, an embodiment of the present invention further provides a device based on the method for adaptive interference cancellation. Wherein the meanings of the nouns are the same as in the above method, and the details of the specific implementation can be referred to the descriptions in the method embodiments.

Referring to fig. 5, fig. 5 is a schematic structural diagram of an adaptive interference cancellation apparatus according to an embodiment of the present invention, where the adaptive interference cancellation apparatus includes:

a first determining module 501, configured to adaptively select an interference cancellation mode between a first signal processing apparatus and a second signal processing apparatus according to interference cancellation capabilities of the first signal processing apparatus and the second signal processing apparatus in a same uplink receiving resource group, where the interference cancellation capabilities include: demodulation interference cancellation, or decoding interference cancellation, or not supporting interference cancellation;

A second determining module 502, configured to determine, according to the interference cancellation mode, interference cancellation processing manners of the first signal processing device and the second signal processing device, so that the first signal processing device and the second signal processing device perform interference cancellation on the received signal according to the interference cancellation processing manners.

As can be seen from the foregoing, in the apparatus for adaptive interference cancellation provided in the embodiment of the present invention, the interference cancellation mode between the signal processing devices is adaptively selected according to the energy dissipation capability of the interference pair of the signal processing devices, and the interference cancellation processing mode corresponding to each signal processing device is determined, so that the adaptive selection of the interference cancellation mode between the signal processing devices is realized, and the benefit of the interference cancellation between the signal processing devices is not complete.

Preferably, the first determining module 501 adaptively selects the interference cancellation mode between the first signal processing apparatus and the second signal processing apparatus, which may specifically include the following two cases:

further, if the interference cancellation capabilities of the first signal processing device and the second signal processing device in the same uplink receiving resource group are the same: determining an interference cancellation mode between the first signal processing device and the second signal processing device as an interference cancellation mode supporting a highest interference cancellation capability; in this embodiment, the first determining module 501 is configured to:

furthermore, the interference cancellation capabilities of the first signal processing apparatus and the second signal processing apparatus in the same uplink reception resource group are different:

in this embodiment, the first determining module 501 is further configured to:

that is, two cases may be included:

In summary, in the two cases, if the signal processing apparatuses supporting interference cancellation have different highest interference cancellation capabilities and include a signal processing apparatus supporting decoding interference cancellation, it is determined that the interference cancellation mode among the signal processing apparatuses is a hybrid interference cancellation mode in which demodulation cancellation is performed first and then decoding cancellation is performed, and thus, the inter-board cancellation mode performs interference cancellation for the signal processing apparatus supporting demodulation interference cancellation and the signal processing apparatus supporting decoding interference cancellation, users among the signal processing apparatuses can enjoy demodulation interference cancellation gains mutually, and users in the signal processing apparatus having decoding interference cancellation capability can enjoy decoding interference cancellation gains mutually. The signal processing equipment configures user interference cancellation attributes (configures users to perform demodulation interference cancellation or decoding interference cancellation) based on the indication information of the inter-signal processing equipment interference cancellation mode self-adaptive module, and performs data information cancellation alternately through the channels between the signal processing equipment at defined delay time. Similarly, if the inter-board cancellation mode is to perform interference cancellation for signal processing devices that all support demodulation interference cancellation, users between the signal processing devices can enjoy demodulation interference cancellation gains, and the signal processing device configures user interference cancellation attributes (configures users to perform demodulation interference cancellation) based on the indication information of the inter-signal processing device interference cancellation mode adaptive module.

The interference cancellation process of the first signal processing device and the second signal processing device may refer to the interference cancellation scenario schematic shown in fig. 3 and fig. 4 of the above embodiment, which is not specifically set forth herein; it is further easy to think that the embodiment of the present invention only uses the above application scenarios as an example to describe the adaptive interference cancellation apparatus and the interference cancellation process, but does not constitute a limitation to the present invention.

In addition, the apparatus for adaptive interference cancellation may be specifically a base station.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the module unit in the above-described apparatus for adaptive interference cancellation, apparatus and device, and the specific application scenario may refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

As can be seen from the above, the first signal processing device and the second signal processing device configure the user interference cancellation attribute (configure the user to perform demodulation interference cancellation or decoding interference cancellation) based on the indication information of the inter-signal processing device interference cancellation mode adaptive module, and exchange the cancellation data information through the inter-signal processing device channel at the defined delay time. For the signal processing equipment supporting the decoding interference cancellation capability, a mixed interference cancellation processing mode of firstly carrying out demodulation interference cancellation and then carrying out decoding interference cancellation is supported, and the interference cancellation mode among the signal processing equipment is selected in a self-adaptive mode, namely, the interference cancellation mode among the signal processing color Hebei and the interference cancellation processing mode of the signal processing equipment are configured in a self-adaptive mode according to the interference of the signal processing equipment on the energy dissipation capacity. On the premise of ensuring the mutual benefit of the interference cancellation among the signal processing devices, the interference cancellation capability of the signal processing devices is utilized to the maximum, so that the system gain is improved.

Referring to fig. 6, fig. 6 is another schematic structural diagram of an apparatus for adaptive interference cancellation according to an embodiment of the present invention, which may include at least one processor 601 (e.g., a CPU, a central processing Unit), at least one network interface or other communication interfaces, a memory 602, and at least one communication bus, for implementing connection and communication between the apparatuses. The processor 601 is used to execute executable modules, such as computer programs, stored in a memory. The Memory 602 may include a high-speed Random Access Memory (RAM) and may further include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the system gateway and at least one other network element is realized through at least one network interface (which can be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network and the like can be used.

As shown in fig. 6, in some embodiments, the memory 602 stores program instructions, which can be executed by the processor 601, and the processor 601 performs the following steps:

Further, the processor 601 is configured to adaptively select an interference cancellation mode between the first signal processing apparatus and the second signal processing apparatus, and includes:

Still further, the processor 601 is configured to adaptively select an interference cancellation mode between the first signal processing apparatus and the second signal processing apparatus, and further includes:

It can be understood that, if, for the signal processing apparatuses supporting interference cancellation, if the highest interference cancellation capabilities of the signal processing apparatuses are different and the signal processing apparatuses supporting decoding interference cancellation are included, it is determined that the interference cancellation mode among the signal processing apparatuses is a hybrid interference cancellation mode in which demodulation cancellation is performed first and then decoding cancellation is performed, and thus, the inter-board cancellation mode performs interference cancellation for the signal processing apparatuses supporting demodulation interference cancellation and the signal processing apparatuses supporting decoding interference cancellation, users among the signal processing apparatuses can enjoy demodulation interference cancellation gains mutually, and users in the signal processing apparatuses having decoding interference cancellation capabilities can enjoy decoding interference cancellation gains mutually. The signal processing equipment configures user interference cancellation attributes (configures users to perform demodulation interference cancellation or decoding interference cancellation) based on the indication information of the inter-signal processing equipment interference cancellation mode self-adaptive module, and performs data information cancellation alternately through the channels between the signal processing equipment at defined delay time. Similarly, if the inter-board cancellation mode is to perform interference cancellation for signal processing devices that all support demodulation interference cancellation, users between the signal processing devices can enjoy demodulation interference cancellation gains, and the signal processing device configures user interference cancellation attributes (configures users to perform demodulation interference cancellation) based on the indication information of the inter-signal processing device interference cancellation mode adaptive module.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process and specific application scenario of the adaptive interference cancellation apparatus, the processor 603 in the apparatus may refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

As can be seen from the above, in the apparatus for adaptive interference cancellation provided in the embodiment of the present invention, the interference cancellation mode between the signal processing devices is adaptively selected according to the energy dissipation capability of the interference pair of the signal processing devices, and the interference cancellation processing mode corresponding to each signal processing device is determined, so that the adaptive selection of the interference cancellation mode between the signal processing devices is realized, and the benefit of the interference cancellation between the signal processing devices is not complete; furthermore, the interference cancellation mode comprises a hybrid interference cancellation mode which firstly performs demodulation interference cancellation and then performs decoding interference cancellation, and the interference cancellation capability of the signal processing equipment is utilized to the highest degree on the premise of ensuring the mutual benefits of the interference cancellation among the signal processing equipment, so that the system gain is improved.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

While the method and apparatus for adaptive interference cancellation provided by the present invention have been described in detail, those skilled in the art will appreciate that the various modifications, additions, substitutions, and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

1. A method for adaptive interference cancellation, comprising:

2. The method of claim 1, wherein adaptively selecting an interference cancellation mode between the first signal processing device and the second signal processing device comprises:

3. The method of claim 1 or 2, wherein the adaptively selecting the interference cancellation mode between the first signal processing device and the second signal processing device, further comprises:

4. An apparatus for adaptive interference cancellation, comprising:

5. The apparatus of claim 4, wherein the first determining module is configured to:

6. The apparatus of claim 4 or 5, wherein the first determining module is further configured to:

7. The device according to claim 6, characterized in that the device is in particular a base station.