TW201611643A - Method and apparatus for assisting UE to reduce interference - Google Patents

Abstract

The present invention aims to assist UE to reduce the interference from the neighboring base station by providing UE with subset restriction (SR) related information which includes one or more levels of multiple-level signaling. According to the present invention, an apparatus, in a base station in a wireless network, for assisting UE served by another base station to reduce interference, is provided, the apparatus comprises: means for receiving the request for subset restriction from the serving base station; means for, in response to the request, providing the subset restriction related information to said serving base station, wherein the SR related information may comprise one or more levels of multiple-level signaling, the first level of which indicating whether to activate SR and the next levels of which indicating the specifics of SR if SR is to be activated. With the present invention, the following advantages are achieved: (1) The subset restriction related information provided by the interfering base station assists UE to reduce the erroneous detection and improve its throughout performance; (2) The hierarchy of multiple-level signaling provides more flexibility for base stations to indicate various combinations of subset restriction. This is to allow base stations to decide to start or stop the subset restriction; (3) The hierarchy of multiple-level signaling provides a flexibility to accommodate future expansion.

Description

Method and device for assisting UE to reduce interference

The present invention relates to the field of wireless networks, and more particularly to techniques for assisting a UE in reducing interference in a wireless network.

In a wide variety of wireless networks (eg, 3GPP-based wireless networks), user equipment (UE) in a cell served by a base station will be subject to proximity from a neighbor located near the adjacent base station. Base station interference. Interference will cause false detections in the UE and affect its throughput performance.

In the 3GPP Work Item (WI) Release 12, Network Assisted Interference Cancellation & Suppression (NAICS) is proposed, which provides information about the interferer so that the UE can use this information to suppress or suppress the interference, thereby reducing errors. Detect and improve throughput performance. However, no specific details are disclosed in the WI Release 12.

The present invention aims to assist the UE in reducing interference from neighboring base stations by providing sub-set restriction (SR) related information to the UE, and sub-set restriction (SR) The information contains one or more levels of multi-level messaging.

According to an embodiment, a device is provided for facilitating interference reduction by a UE served by another base station in a base station in a wireless network, the apparatus comprising: for receiving a Subset Restriction (SR) from the serving base station The requesting organization; an organization for providing sub-sets to limit information to the service base station in response to the request, wherein the SR related information includes one or more levels of multi-level messaging, and the first level of multi-level signaling is an indication Whether to activate the SR, and the next level is to indicate the details of the SR if the SR is to be actuated.

According to a second embodiment, a device is provided for facilitating interference reduction by a UE served by a base station itself in a base station in a wireless network, the apparatus comprising: for transmitting a request for a subset set restriction (SR) to the interference a mechanism for receiving a subset of the information transmitted by the interfering base station to limit the information in response to the request, wherein the sub-set restriction information includes one or more levels of multi-level signaling, and the first level is an indication Whether to activate the SR, and the next level is to indicate the details of the SR if the SR is to be actuated, for delivering the received subset to limit the information to the UE that requires NAICS.

According to a third embodiment, a method is provided for assisting a UE served by a base station itself to reduce interference in a base station in a wireless network, the method comprising: Receiving a request for a Subset Restriction (SR) from the serving base station; providing a sub-set restriction information to the serving base station in response to the request, wherein the sub-set restriction information includes one or more levels of multi-level signaling, The first level is to indicate whether to activate the SR, and the next level is to indicate the details of the SR if the SR is to be actuated.

According to a fourth embodiment, a method is provided for assisting a UE served by a base station itself to reduce interference in a base station in a wireless network, the method comprising: transmitting a request for a subset set restriction (SR) to an interfering base station; receiving The subset sent by the interfering base station limits the information to respond to the request, wherein the sub-set restriction information includes one or more levels of multi-level signaling, the first level indicates whether to activate the SR, and the next level The details of the SR are indicated if the SR is to be actuated; the received sub-collection limits the information to the UE requiring NAICS.

According to the present invention, the following advantages are obtained: - the subset of the information provided by the interfering base station limits the information to assist the UE in reducing false detections and improving its throughput performance; - the hierarchical structure of the multi-level messaging provides more flexibility The base station indicates various combinations of sub-collection restrictions. This will allow the base station to decide to initiate or stop sub-collection restrictions; - the hierarchical structure of multi-level messaging will provide resiliency to accommodate future expansions.

11‧‧‧ Receiving device

12‧‧‧ Providing devices

21‧‧‧Send device

22‧‧‧ Receiving device

121‧‧‧Decision module

122‧‧‧Transmission module

Other features, objects, and advantages of the present invention will become apparent from the Detailed Description of the appended claims.

1 shows an exemplary wireless network scenario; FIG. 2 shows a flow chart of a method for assisting a user equipment to reduce interference, in accordance with an embodiment of the present invention; FIG. 3 shows an assisted user device in accordance with another embodiment of the present invention. FIG. 4 is a schematic diagram showing a system for assisting a user equipment to reduce interference according to an embodiment of the invention; FIG. 5 is a diagram showing a system for assisting a user equipment to reduce interference according to an embodiment of the invention; Schematic diagram.

The same or similar reference numerals in the drawings represent the same or similar component components.

Hereinafter, the present invention will be further described with reference to the accompanying drawings.

Definition of Terms:

For the sake of clarity, as described below, first define some terms in the text:

- "Wireless Network" means a telecommunications network for voice and/or data transmission via wireless signals, which includes a number of base stations, each serving one or more cells, one or more users in the cell device. Wireless network package This includes, but is not limited to, wireless networks based on GSM, CDMA, 3GPP (3rd Generation Partnership Project) agreements.

- "Base station" refers to a radio station with a two-way transceiver that has uplink and downlink communications via radio signals with its serving UE and also communicates directly or indirectly with other base stations. The wireless network includes, but is not limited to, a base station in a GSM-based wireless network, a Node B in a CDMA protocol-based wireless network, and an e-Node B in a 3GPP-based wireless network.

- "User Equipment" means a communication device used by a user that has uplink and downlink communications with a base station in a wireless network. User equipment includes, but is not limited to, a mobile phone, laptop or tablet having a telecommunications module for a wireless network.

Figure 1 shows an example of a wireless network scenario that includes a number of base stations, each of which will serve a cell. Moreover, there are numerous user devices in each cell. For the sake of simplicity, only the two base stations BS1 and BS2 are shown. Moreover, for the sake of simplicity, only one user equipment UE3 is shown to be a cell served by the base station BS2, and the base station BS2 is referred to as a "serving base station", and the UE3 is located close to the periphery covered by the BS1 and when it is associated with the BS2 in the downlink. The communication is subject to interference from BS1, and BS1 is called "interference base station". Among them, the wireless network can be a 3GPP-based wireless network. Preferably, it is an LTE network, and the base station is a Node B of the LTE network.

2 shows a flow chart of a method of assisting a user device in reducing interference, in accordance with an embodiment of the present invention. Detailed description will be made with reference to FIG. 2 and FIG. 1 as described below.

As shown in FIG. 1, during uplink and downlink communication with BS2, UE3 in the cell of BS2 is located near the cell of BS1, and thus is subject to interference from BS1.

In order to assist the UE3 to cancel & suppress the downlink interference from the BS1, in step S201, the BS2 transmits a request for requesting the BS1 to initiate the sub-set restriction related information (SR) operation to the BS1, that is, the base station and the downlink A parameter related to the road communication is limited to the subset to avoid interference with other neighboring base stations.

The request only contains an indication of the presence of a UE that requires Network Assistance Interference Cancellation & Suppression (NAICS), or contains explicit information for requesting BS1 to actuate the SR. Those skilled in the art will appreciate that the request may include information for requesting BS1 to actuate other types of SR operations.

After receiving the request for the SR from the BS 2, in step S202, the BS 1 transmits the SR related information to the BS 2 as a response. As will be appreciated by those skilled in the art, SR related information may be included in a particular field of the message specified by the specifications of the existing interface, such as the X2 interface, between the two sites, or via an existing or new interface between the two bases. It is carried by a new message. It should be understood that other ways of carrying SR-related information, while applicable to the present invention, are within the scope of the present invention and are incorporated herein by reference.

The SR related information includes multi-level signaling, with the first level indicating whether to activate the SR; and the next level indicating the details of the SR if the SR is to be actuated. For example, in the case of a two-level signaling, the first level of signaling is a sequence of N-bit SR binary bits specific to the base station. The bits of the sequence correspond to difference parameters that can be executed as SR operations. When the bit is "1" It indicates that the SR operation is active for its corresponding parameter; otherwise, when the bit is "0", it means that no SR operation is active for its corresponding parameter. Moreover, the second level of signaling includes one or more information elements (IEs) corresponding to some or all of the "1" bits in the sequence. Each IE defines a specific information of the SR operation corresponding to different "1" bits of the N-bit SR binary sequence and parameters corresponding to the "1" bit.

In an example, the SR related information includes a sequence of N-bit SR binary bits specific to the base station. The bits of the sequence correspond to difference parameters that can be executed as SR operations. When the bit is "1", it indicates that the SR operation is active for its corresponding parameter; otherwise, when the bit is "0", it means that no SR operation is actuated for its corresponding parameter.

In another example, in addition to the N-bit SR binary sequence, the SR-related information includes certain information elements (IEs) corresponding to some or all of the "1" bits in the sequence. Each IE defines a specific information of the SR operation corresponding to different "1" bits of the N-bit SR binary sequence and parameters corresponding to the "1" bit. For example:

- For a Transmission Mode (TM) bit of "1", its corresponding IE defines a specific subset or range of restricted transmission modes.

- For a Physical Resource Block (PRB) bit of "1", its corresponding IE defines a specific subset or number of restricted PRBs.

- For a codebook (CB) bit of "1", its corresponding IE defines a specific subset or number of codes in the restricted codebook.

In an alternative example, the N-bit SR sequence is static or semi-static, i.e., it does not have to be updated frequently. Specifically, the interference base station will The N-bit SR sequence is notified to other base stations via global broadcast or only its N-bit SR sequence is sent to other base stations once in response to its request. Once the N-bit SR sequence is received from the interfering base station, the other base stations will keep it in the storage device and will not be updated until the next time the new N-bit SR sequence is received from the same interfering base station. . In this case, since BS2 maintains the N-bit SR sequence previously transmitted by BS1, BS2 only needs to transmit the IE corresponding to part or all of the "1" bits of the N-bit SR sequence to BS1, " The 1" bit defines the details of the sub-set limits of its corresponding parameters. In this way, it is avoided that the N-bit SR sequence is transmitted frequently every time, and therefore, the signaling overhead at the time of SR-related information transmission is greatly reduced.

After receiving the SR related information from BS1, BS2 delivers this SR related information to UE3. UE3 will use this SR information in the detection process and gain the advantages of detection performance and complexity.

3 shows a flow chart of a method of assisting a user equipment to reduce interference in accordance with another embodiment of the present invention. Detailed description will be made with reference to FIG. 3 and FIG. 1 as described below.

As shown in FIG. 1, during uplink and downlink communication with BS2, UE3 in the cell of BS2 is located near the cell of BS1, and thus is subject to interference from BS1.

In order to assist UE3 to cancel & suppress downlink interference from BS1, BS2 transmits a request for requesting BS1 to activate a subset set restriction (SR) operation to BS1 in step S301, that is, the base station will be related to downlink communication. Certain parameters are restricted to sub-sets to avoid interference with other nearby bases station.

The request only contains an indication of the presence of a UE that requires Network Assistance Interference Cancellation & Suppression (NAICS), or contains explicit information for requesting BS1 to actuate the SR. It will be appreciated by those skilled in the art that the request may include information for requesting other types of BS1 to actuate the SR operation, as will fall within the scope of the present invention and as incorporated herein by reference.

After receiving the request for the SR from the BS 2, the BS 1 decides whether to activate the SR according to the request, in step S302. For example, upon receipt of a request, BS1 evaluates the impact of its system performance caused by the SR to be actuated. Its system performance includes, but is not limited to, any combination of the flexibility or performance of its scheduler, the number of UEs it serves, or its throughput, and the like. If the effect is not outside the predetermined conditions, it then decides to actuate the SR; otherwise, it decides not to actuate the SR. It will be appreciated by those skilled in the art that other ways of determining whether to actuate the SR operation, as applicable to the present invention, are within the scope of the present invention and are incorporated herein by reference.

In this way, more flexibility is provided to the interfering base station, ie, BS1, to decide whether to initiate the SR, thus balancing the stability of the system performance and providing network assisted interference cancellation & suppression to the UE.

In step S303, if it is decided to actuate the SR, BS1 transmits the SR related information to BS2 as a response. As will be appreciated by those skilled in the art, SR related information may be included in a particular field of the message specified by the specifications of the existing interface, such as the X2 interface, between the two sites, or via an existing or new interface between the two bases. It is carried by a new message. It should be understood that other means for carrying SR related information should fall into this section if it can be applied to the present invention. The scope of protection of the invention is hereby incorporated by reference.

The SR related information includes multi-level signaling, with the first level indicating whether to activate the SR; and the next level indicating the details of the SR if the SR is to be actuated. For example, in the case of a two-level signaling, the first level of signaling is a sequence of N-bit SR binary bits specific to the base station. The bits of the sequence correspond to difference parameters that can be executed as SR operations. When the bit is "1", it indicates that the SR operation is active for its corresponding parameter; otherwise, when the bit is "0", it means that the SR operation is not actuated for its corresponding parameter without SR operation. Moreover, the second level of signaling includes one or more information elements (IEs) corresponding to some or all of the "1" bits in the sequence. Each IE defines a specific information of the SR operation corresponding to different "1" bits of the N-bit SR binary sequence and parameters corresponding to the "1" bit.

In an example, the SR related information includes a sequence of N-bit SR binary bits specific to the base station. The bits of the sequence correspond to difference parameters that can be executed as SR operations. When the bit is "1", it indicates that the SR operation is active for its corresponding parameter; otherwise, when the bit is "0", it means that no SR operation is actuated for its corresponding parameter.

In another example, in addition to the N-bit SR binary sequence, the SR-related information includes certain information elements (IEs) corresponding to some or all of the "1" bits in the sequence. Each IE defines a specific information of the SR operation corresponding to different "1" bits of the N-bit SR binary sequence and parameters corresponding to the "1" bit. For example:

- For a Transmission Mode (TM) bit of "1", its corresponding IE defines a specific subset or range of restricted transmission modes.

- For a Physical Resource Block (PRB) bit of "1", its corresponding IE defines a specific subset or number of restricted PRBs.

- For a codebook (CB) bit of "1", its corresponding IE defines a specific subset or number of codes in the restricted codebook.

In an example, the N-bit SR sequence is static or semi-static, that is, it does not have to be updated frequently. Specifically, the interfering base station will notify its other base stations via global broadcasts of its N-bit SR sequence or only send its N-bit SR sequence to other base stations once in response to its request. Once the N-bit SR sequence is received from the interfering base station, the other base stations will keep it in the storage device and will not be updated until the next time the new N-bit SR sequence is received from the same interfering base station. . In this case, since BS2 maintains the N-bit SR sequence previously transmitted by BS1, BS2 only needs to transmit the IE corresponding to part or all of the "1" bits of the N-bit SR sequence to BS1, " The 1" bit defines the details of the sub-set limits of its corresponding parameters. In this way, it is avoided that the N-bit SR sequence is transmitted frequently every time, and therefore, the signaling overhead at the time of SR-related information transmission is greatly reduced.

In step S305 (not shown), if it is decided not to actuate the SR, the BS 2 transmits, for example, an N-bit SR sequence or a non-acknowledgement (NAK) response of all "0" bits to the BS 2 to indicate that no SR is activated. Alternatively, BS2 simply does not send a response to BS2 to indicate that no SR is activated. It should be understood that other means for indicating that no SR is actuated, while applicable to the present invention, are intended to fall within the scope of the present invention and are incorporated herein by reference.

In step S304, upon receiving the SR related information from the BS 1, the BS 2 delivers the SR related information to the UE 3. UE3 will use this SR information in the detection process and gain the advantages of detection performance and complexity.

4 shows an overview of a system for assisting a user device in reducing interference, in accordance with an embodiment of the present invention. Detailed description will be made with reference to FIG. 4 and FIG. 1 as described below.

As shown in FIG. 1, during uplink and downlink communication with BS2, UE3 in the cell of BS2 is located near the cell of BS1, and thus is subject to interference from BS1.

In order to assist the UE3 to cancel & suppress downlink interference from BS1, in BS2, a mechanism 21 called "sending device" transmits a request for requesting BS1 to initiate a subset restriction related information (SR) operation to BS1, that is, The base station limits certain parameters related to downlink communications to subsets to avoid interference with other neighboring base stations.

The request only contains an indication of the presence of a UE that requires Network Assistance Interference Cancellation & Suppression (NAICS), or contains explicit information for requesting BS1 to actuate the SR. Those skilled in the art will appreciate that the request may include information for requesting BS1 to actuate other types of SR operations.

After receiving the request for the SR from the BS 2, in the BS 1, the mechanism 11 called "providing device" transmits the SR related information to the BS 2 as a response. As will be appreciated by those skilled in the art, SR related information may be included in a particular field of the message specified by the specifications of the existing interface, such as the X2 interface, between the two sites, or via an existing or new interface between the two bases. It is carried by a new message. It should be understood that if it can be applied to the present invention, it is used for carrying Other ways of SR related information should fall within the scope of the present invention and are incorporated herein by reference.

The SR related information includes multi-level signaling, with the first level indicating whether to activate the SR; and the next level indicating the details of the SR if the SR is to be actuated. For example, in the case of a two-level signaling, the first level of signaling is a sequence of N-bit SR binary bits specific to the base station. The bits of the sequence correspond to difference parameters that can be executed as SR operations. When the bit is "1", it indicates that the SR operation is active for its corresponding parameter; otherwise, when the bit is "0", it means that no SR operation is active for its corresponding parameter. Moreover, the second level of signaling includes one or more information elements (IEs) corresponding to some or all of the "1" bits in the sequence. Each IE defines a specific information of the SR operation corresponding to different "1" bits of the N-bit SR binary sequence and parameters corresponding to the "1" bit.

In an example, the SR related information includes a sequence of N-bit SR binary bits specific to the base station. The bits of the sequence correspond to difference parameters that can be executed as SR operations. When the bit is "1", it indicates that the SR operation is active for its corresponding parameter; otherwise, when the bit is "0", it means that no SR operation is actuated for its corresponding parameter.

In another example, in addition to the N-bit SR binary sequence, the SR-related information includes certain information elements (IEs) corresponding to some or all of the "1" bits in the sequence. Each IE defines a specific information of the SR operation corresponding to different "1" bits of the N-bit SR binary sequence and parameters corresponding to the "1" bit. For example:

- For the transmission mode (TM) bit of "1", its corresponding IE Define a specific subset or range of restricted transmission modes.

- For a Physical Resource Block (PRB) bit of "1", its corresponding IE defines a specific subset or number of restricted PRBs.

- For a codebook (CB) bit of "1", its corresponding IE defines a specific subset or number of codes in the restricted codebook.

In an alternative example, the N-bit SR sequence is static or semi-static, i.e., it does not have to be updated frequently. Specifically, the interfering base station will notify its other base stations via global broadcasts of its N-bit SR sequence or only send its N-bit SR sequence to other base stations once in response to its request. Once the N-bit SR sequence is received from the interfering base station, the other base stations will keep it in the storage device and will not be updated until the next time the new N-bit SR sequence is received from the same interfering base station. . In this case, since BS2 maintains the N-bit SR sequence previously transmitted by BS1, BS2 only needs to transmit the IE corresponding to part or all of the "1" bits of the N-bit SR sequence to BS1, " The 1" bit defines the details of the sub-set limits of its corresponding parameters. In this way, it is avoided that the N-bit SR sequence is transmitted frequently every time, and therefore, the signaling overhead at the time of SR-related information transmission is greatly reduced.

After receiving the SR related information from the BS 1, the mechanism 25 (not shown) of the BS 2 called "delivery device" delivers the SR related information to the UE 3. UE3 will use this SR information in the detection process and gain the advantages of detection performance and complexity.

It should be understood by those skilled in the art that the above devices and modules in each base station BS1, BS2 can be independent of each other. Alternatively, some or all of them The departments can be integrated together in the same device such as scheduling.

FIG. 5 shows an overview of a system for assisting a user device to reduce interference in accordance with another embodiment of the present invention.

As shown in FIG. 1, during uplink and downlink communication with BS2, UE3 in the cell of BS2 is located near the cell of BS1, and thus is subject to interference from BS1. The detailed description is made with reference to FIG. 5 and FIG. 1 as described below.

In order to assist UE3 to cancel & suppress downlink interference from BS1, in BS2, a mechanism 21 called "sending device" transmits a request for requesting BS1 to actuate the subset set restriction related information (SR) operation to BS1, that is, The base station limits certain parameters related to downlink communications to subsets to avoid interference with other neighboring base stations.

The request only contains an indication of the presence of a UE that requires Network Assistance Interference Cancellation & Suppression (NAICS), or contains explicit information for requesting BS1 to actuate the SR. Those skilled in the art will appreciate that the request may include information for requesting BS1 to actuate other types of SR operations. This will fall within its scope of protection and is hereby incorporated by reference.

After receiving the request for the SR from the BS 2, in the mechanism 12 called "providing device" of the BS 1, the decision module 121 decides whether to activate the SR according to the request. For example, upon receipt of a request, decision module 121 evaluates the impact of its system performance caused by the SR to be actuated. System performance includes, but is not limited to, any combination of the flexibility or performance of its scheduler, the number of UEs it serves, or its throughput, and the like. If the impact is not outside the predetermined conditions, the decision module 121 then decides to actuate the SR; Then, it decides not to activate the SR. It will be appreciated by those skilled in the art that other ways of determining whether to actuate the SR operation, as applicable to the present invention, are within the scope of the present invention and are incorporated herein by reference.

In this way, more flexibility is provided to the interfering base station, ie, BS1, to decide whether to initiate the SR, thus balancing the stability of the system performance and providing network assisted interference cancellation & suppression to the UE.

If the decision module 121 decides to actuate the SR, the transmitting module 122 in the providing device 12 sends the SR related information to the BS 2 as a response. It will be appreciated by those skilled in the art that SR related information may be included in a particular field of the message specified by the specifications of the existing interface, such as the X2 interface, or via an existing or new interface between the two bases. Shipped by a new message. It should be understood that other ways of carrying SR-related information, while applicable to the present invention, are within the scope of the present invention and are incorporated herein by reference.

In an example, the SR related information includes a sequence of N-bit SR binary bits specific to the base station. The bits of the sequence correspond to difference parameters that can be executed as SR operations. When the bit is "1", it indicates that the SR operation is active for its corresponding parameter; otherwise, when the bit is "0", it means that no SR operation is actuated for its corresponding parameter.

In another example, in addition to the N-bit SR binary sequence, the SR-related information includes certain information elements (IEs) corresponding to some or all of the "1" bits in the sequence. Each IE defines a specific information of the SR operation corresponding to different "1" bits of the N-bit SR binary sequence and parameters corresponding to the "1" bit. For example:

- For a Transmission Mode (TM) bit of "1", its corresponding IE defines a specific subset or range of restricted transmission modes.

- For a Physical Resource Block (PRB) bit of "1", its corresponding IE defines a specific subset or number of restricted PRBs.

- For a codebook (CB) bit of "1", its corresponding IE defines a specific subset or number of codes in the restricted codebook.

In an alternative example, the N-bit SR sequence is static or semi-static, i.e., it does not have to be updated frequently. Specifically, the interfering base station will notify its other base stations via global broadcasts of its N-bit SR sequence or only send its N-bit SR sequence to other base stations once in response to its request. Once the N-bit SR sequence is received from the interfering base station, the other base stations will keep it in the storage device and will not be updated until the next time the new N-bit SR sequence is received from the same interfering base station. . In this case, since BS2 maintains the N-bit SR sequence previously transmitted by BS1, BS2 only needs to transmit the IE corresponding to part or all of the "1" bits of the N-bit SR sequence to BS1, " The 1" bit defines the details of the sub-set limits of its corresponding parameters. In this way, it is avoided that the N-bit SR sequence is transmitted frequently every time, and therefore, the signaling overhead at the time of SR-related information transmission is greatly reduced.

If the decision module 121 determines that the SR is not to be actuated, the BS 2 transmits a response such as an N-bit SR sequence or a non-acknowledgment (NAK) of all "0" bits to the BS 2 to indicate that no SR is activated. Alternatively, BS2 simply does not send a response to BS2 to indicate that no SR is activated. It should be understood that other means for indicating that no SR is actuated, if applicable to the present invention The formula is intended to fall within the scope of the invention and is hereby incorporated by reference.

Upon receiving the SR related information from the BS 1, the mechanism 25 (not shown) of the BS 2 called "delivery device" delivers the SR related information to the UE 3. UE3 will use this SR information in the detection process and gain the advantages of detection performance and complexity.

It should be understood by those skilled in the art that the above devices and modules in each base station BS1, BS2 can be independent of each other. Alternatively, some or all of them may be integrated together in the same device such as a schedule.

It should be noted that the present invention can be implemented in a combination of software and/or software and hardware, for example, by using an application specific integrated circuit (ASIC), a general purpose computer, or any other similar hardware device. invention. In one embodiment, the software program of the present invention may be executed by a processor to perform the above steps or functions. Similarly, the software program of the present invention (including related data structures) can be stored in a computer readable medium, such as a RAM memory, a magneto-optical device, or a floppy disk and the like. In addition, some of the steps or functions of the present invention may be implemented by using hardware, for example, in conjunction with a processor to perform a variety of steps or functions.

Moreover, a portion of the present invention can be applied as a computer program product, such as computer program instructions, which can be invoked or provided via the operation of the computer when the instructions are executed by a computer. However, the program instructions for calling the method of the present invention can be stored in a fixed or removable recording medium, and/or transmitted via a broadcast or other signal carrying medium, and/or stored in accordance with the program instructions. In the operating memory of the computer device. Therefore, there is a device that is implemented in accordance with the present invention. For example, the device includes a memory for storing computer program instructions and a processor for executing program instructions, the device being triggered to operate the method according to the above embodiment of the present invention when the computer program instructions are executed by the processor And / or technical solutions.

It is apparent that the present invention is not limited to the details of the above-described embodiments, and the present invention can be carried out in other specific forms without departing from the spirit or essential characteristics of the invention. The present invention is to be considered in all respects as illustrative and not limiting, and the scope of the invention is defined by the scope of the appended claims The equivalents of the components in the scope of the claims and all changes within the scope of the invention. Any code in the scope of the patent application should not be considered as limiting the relevant claim. In addition, "includes/includes" obviously does not exclude other components or steps, and the singular does not exclude plural components. The various components or mechanisms mentioned in the device request can also be completed by a component or mechanism via software or hardware, for example, first and The second letter is used only to represent the name and not any particular order.

11‧‧‧ Receiving device

12‧‧‧ Providing devices

21‧‧‧Send device

22‧‧‧ Receiving device

Claims (17)

An apparatus for assisting a UE served by another base station to reduce interference in a base station in a wireless network, the apparatus comprising: means for receiving a request for a subset set restriction (SR) from the serving base station; Providing the sub-collection to limit information to the service base station to respond to the requesting mechanism, wherein the SR related information includes one or more levels of multi-level signaling, and the first level of the multi-level signaling is an indication Whether to activate the SR, and the next level is to indicate the details of the SR if the SR is to be actuated. The device of claim 1, wherein the means for providing comprises: a determining module for deciding whether to provide the subset to limit the information according to the request; and sending a module to decide to provide the When the sub-collection limits the information, it is used to send the sub-collection to limit the information to the service base station. The device of claim 1 or 2, wherein the request includes indication information of a UE that requires Network Assistance Interference Cancellation & Suppression (NAICS). The device of any one of claims 1 to 3, wherein the sub-set restriction related information comprises a first level of transmission, the first level of transmission is an N-bit binary sequence, the N-bit two The bits of the carry sequence are each assigned and used to indicate a subset limit for each difference parameter. The device of any one of claims 1 to 4, wherein the sub-set restriction information further includes a second level of signaling, the second Hierarchical signaling consists of certain information elements (IEs), each IE corresponding to a different bit of the N-bit binary sequence and a detail defining the sub-set limit represented by the bit. An apparatus for assisting a UE served by another base station to reduce interference in a base station in a wireless network, the apparatus comprising: means for transmitting a request for a subset set restriction (SR) to the interfering base station; Means for receiving a subset of the information transmitted by the interfering base station to limit the information to the request, wherein the sub-set restriction information includes one or more levels of multi-level signaling, the first of the multi-level signaling The level is to indicate whether to activate the SR, and the next level is to indicate the details of the SR if the SR is to be actuated; the delivery device delivers the received subset to limit the information to the UE requiring NAICS. The device of claim 6, wherein the request includes indication information that a UE requiring NAICS exists. A method for reducing interference by a UE served by a base station itself in a base station in a wireless network, comprising: receiving a request for a Subset Restriction (SR) from the serving base station; providing a sub-set restriction related information The service base station responds to the request, wherein the sub-set restriction information includes one or more levels of multi-level transmission, and the first level of the multi-level transmission indicates whether to activate the SR, and the multi-order transmission The next level is to indicate the details of the SR if the SR is activated. The method of claim 8, wherein the providing step comprises: determining, according to the request, whether to provide the subset to limit related information; and, when deciding to provide the subset to limit related information, sending the subset restriction Information to the service base station. The method of claim 8 or 9, wherein the request includes indication information that a UE requiring NAICS exists. The method of any one of claims 8 to 10, wherein the sub-set restriction related information comprises a first level of transmission, the first level of transmission is an N-bit binary sequence, the N-bit two The bits of the carry sequence are each assigned and used to indicate a subset limit for each difference parameter. The method of any one of claims 8 to 11, wherein the sub-set restriction information further comprises a second level of transmission, the second level of communication consisting of certain information elements (IE), each IE The different bits corresponding to the N-bit binary sequence and the details defining the subset limit represented by the bits, respectively. A method for reducing interference by a UE served by a base station itself in a base station in a wireless network, comprising: transmitting a request for a subset set restriction (SR) to an interfering base station; receiving the transmission by the interfering base station The subset adjusts the information to respond to the request, wherein the SR related information includes one or more levels of multi-level signaling, the first level indicates whether to activate the SR, and the next level is if the SR is to be actuated Indicate the details of the SR; Delivering the received sub-collection limits relevant information to UEs that require NAICS. The method of claim 13, wherein the request includes indication information that a UE requiring NAICS exists. A base station that assists a UE in reducing interference, the base station comprising the apparatus of any one of claims 1 to 7. A wireless network for assisting a UE in reducing interference, comprising at least one base station according to any one of claims 1-5, and at least one base station according to any one of claims 6-7, wherein The wireless network is based on the 3GPP wireless network. A computer readable medium having instructions stored thereon, the instructions being executed by a computing device in response to the computing device causing the computing device to perform a method as defined in any one of claims 8-14.