WO2015110911A1 - Method for network-assisted interference suppression - Google Patents
Method for network-assisted interference suppression Download PDFInfo
- Publication number
- WO2015110911A1 WO2015110911A1 PCT/IB2015/000150 IB2015000150W WO2015110911A1 WO 2015110911 A1 WO2015110911 A1 WO 2015110911A1 IB 2015000150 W IB2015000150 W IB 2015000150W WO 2015110911 A1 WO2015110911 A1 WO 2015110911A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- user equipment
- base station
- interfering
- message
- interfered
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/005—Interference mitigation or co-ordination of intercell interference
- H04J11/0059—Out-of-cell user aspects
Definitions
- the present invention relates to the field of communication technology, and more specifically, relates to the field of a wireless communication technology.
- inter-cell interference In the field of wireless communication, inter-cell interference is always a hot issue in research in recent years. In particular, with the increasingly wider application of the heterogeneous network structure, it has become an imminent practical problem as to how to solve the inter-cell interference caused by a large-power macro cell to a low power micro cell. Many pertinent solutions have been proposed in the industry, for example, in the 3 GPP specifications, approaches such as inter-cell interference coordination (ICIC) technology are employed to reduce the impact of inter-cell interference on wireless communication.
- IIC inter-cell interference coordination
- NAICS Network-Assisted Interference Cancellation Suppression
- a victim user equipment (or shortly referred to as victim UE) suffers from a co-channel interference from a neighboring cell due to using the same physical resource blocks (or shortly referred to as PRBs) as some user equipments in a nearby neighboring cell.
- PRBs physical resource blocks
- the victim UE has to know downlink transmission parameters of the neighboring cell so as to perform corresponding cancellation/ suppression operations.
- the solution for this step is sending semi- static parameters therein to the victim UE by higher layer signaling, while the remaining dynamic parameters, typically, parameters such as scheduling information of interfering user equipments in the neighboring cell, are obtained by the victim UE through blind decoding the information of the physical downlink control channel (PDCCH) of the neighboring cell, namely, the victim UE needs to blind decode the information in the downlink control indicator (DCI) part of the PDCCH of the neighboring cell.
- PDCCH physical downlink control channel
- DCI downlink control indicator
- An objective of the present invention is to seek for a novel NAICS method that enables the victim UE to obtain corresponding scheduling information with reduced times of blind decoding the PDCCH operations, thereby implementing the NAIC function at the UE side in a simpler manner; besides, the method has to be compatible with the existing specifications to the utmost extent, avoiding too much modification to the existing protocols.
- the present invention proposes a novel NAICS method.
- a dedicated DCI format in a CSS common searching space
- the blind decoding times that need to be performed by the victim UE can be effectively reduced.
- a method for reducing interference on an interfered user equipment in a wireless communication system wherein the interfered user equipment suffers interference from at least one interfering user equipment from other cell, the method comprising: receiving, by the interfered user equipment, a first message sent from a serving base station of the interfering user equipment, wherein the first message includes content associated with blind decoding scheduling information of the interfering user equipment; blind decoding, by the interfered user equipment, on a physical downlink control channel of the serving base station of the interfering user equipment, the scheduling information of the interfering user equipment based on the first message.
- the first message is downlink control information. More preferably, the first message is sent through a common searching space.
- the content associated with blind decoding scheduling information of the interfering user equipment includes: a cell-radio network temporary indicator of the interfering user equipment; a recommended aggregation level of the interfering user equipment, wherein the recommended aggregation level represents an aggregation level most preferably configured by the serving base station of the interfering user equipment.
- the interfered user equipment and the interfering user equipment use a same set of physical resource blocks.
- the same set of physical resource blocks is determined by cooperation between a serving base station of the interfered user equipment and the serving base station of the interfering user equipment.
- the same set of physical resource blocks is determined by cooperation between the serving base station of the interfered user equipment and the serving base station of the interfering user equipment through a X2 interface message.
- a method for assisting in reducing interference on a base station in a wireless communication system wherein at least one user equipment served by the base station generates an interference with at least one user equipment of other cell, the method comprising: sending, by the base station, a first message, wherein the first message includes content associated with blind decoding scheduling information of the at least one user equipment served by the base station.
- the first message is downlink control information.
- the first message is sent through a common searching space.
- the content associated with blind decoding scheduling information of the at least one user equipment served by the base station includes: a cell-radio network temporary indicator of the at least one user equipment served by the base station; a recommended aggregation level of the at least one user equipment served by the base station, wherein the recommended aggregation level represents an aggregation level most preferably configured by the base station. More preferably, the at least one user equipment served by the base station and the at least one user equipment in other cell use a same set of physical resource blocks.
- the same set of physical resource blocks is determined by cooperation between the base station and a servicing base station of the at least one user equipment in other cell.
- the same set of physical resource blocks is determined by cooperation between the base station and the servicing base station of the at least one user equipment in other cell through a X2 interface message.
- an apparatus for reducing interference on an interfered user equipment in a wireless communication system wherein the interfered user equipment suffers interference from at least one interfering user equipment from other cell
- the apparatus comprising: a receiving module configured to have the interfered user equipment receive a first message sent from a serving base station of the interfering user equipment, wherein the first message includes content associated with blind decoding scheduling information of the interfering user equipment; a blind decoding module configured to have the interfered user equipment blind decode, on a physical downlink control channel of the serving base station of the interfering user equipment, the scheduling information of the interfering user equipment based on the first message.
- an apparatus for assisting in reducing interference on a base station in a wireless communication system wherein at least one user equipment served by the base station generates an interference with at least one user equipment of other cell
- the apparatus comprising: a sending module configured to have the base station send a first message, wherein the first message includes content associated with blind decoding scheduling information of the at least one user equipment served by the base station.
- the interfering base station may pass corresponding parameters of the interfering UE to a victim UE, such that the victim UE may obtain schedule parameters of the interfering UE through less blind decoding operations, thereby implementing a NAICS function; in a preferred solution, a UE generating co-channel interference may also be determined through a simple inter-base station cooperation, which further simplifies the working flow of the system; besides, the present invention is compatible with the existing specifications to the utmost extent, which avoids too much modification to the protocol, thereby achieving the objective of the present invention.
- Fig. 1 shows a flow diagram of a method for reducing interference on an interfered user equipment in a wireless communication system according to the present invention
- Fig. 2 shows a flow diagram of a method for assisting in reducing interference on a base station in a wireless communication system according to the present invention
- Fig. 3 shows a block diagram of an apparatus for reducing interference on an interfered user equipment in a wireless communication system according to the present invention
- Fig. 4 shows a block diagram of an apparatus for assisting in reducing interference on a base station in a wireless communication system according to the present invention.
- the same or similar reference numerals indicate the same or similar step features or means/modules.
- interfering UEs which would be co-channel interfered by some UEs (referred as interfering UEs) in a neighboring cell as using the same PRB as with these interfering UEs. Therefore, the victim UE needs to perform a blind decoding operation on a PDCCH channel of a serving base station (referred as an interfering base station) of these interfering UEs, so as to obtain corresponding scheduling information of the interfering UEs for later use in a NAICS function.
- a serving base station referred as an interfering base station
- the victim UE first receives a first message sent from an interfering base station, which first message includes information that may assist the victim UE to perform a blind decoding operation; then, based on the received assistance information, performs a pertinent blind decoding operation to obtain corresponding scheduling information through less blind decoding times.
- the first information may be a novel DCI located in a CSS of a PDCCH channel of an interfering base station.
- the DCI is not specific scheduling information of a certain UE, but blind decoding assistance information of a set of UEs, i.e., all interfering UEs.
- the included assistance information may include:
- C-RNTI cell-radio network temporary indicator
- AL aggregation level
- the known C-RNTI may be selected when blind decoding the PDCCH channel of the interfering base station and the recommended AL is first tried, to perform the blind decoding operation. Hence, it means the times of blind decoding operations that need to be performed by the victim UE are greatly reduced.
- the victim UE and the interfering UE use the same PRB set.
- the PRB set may also be determined through cooperation between two cell base stations, thereby satisfying the need of flexible scheduling and enhancing resource utilization.
- the above cooperation may be performed through an inter-base station X2 interface message.
- the advantage of such design is that the existing signaling system can be followed to the utmost extent, without a need of using a brand-new signaling system.
- Fig. 1 shows a flow diagram according to the above embodiment, comprising: Sll: receiving, by the interfered user equipment, a first message sent from a serving base station of the interfering user equipment, wherein the first message includes content associated with blind decoding scheduling information of the interfering user equipment;
- S12 blind decoding, by the interfered user equipment, on a physical downlink control channel of a serving base station of the interfering user equipment, the scheduling information of the interfering user equipment based on the first message.
- the interfering base station sends a first message that includes information which may assist a victim UE to perform a blind decoding operation.
- the first information may be a novel DCI located in a CSS of a PDCCH channel of an interfering base station.
- the DCI is not specific scheduling information of a certain UE, but blind decoding assistance information of a set of UEs, i.e., all interfering UEs.
- the included assistance information may include: - cell-radio network temporary indicator (C-RNTI) of an interfering UE; and
- the recommended AL represents the AL that is most preferably configured by an interfering base station for the interfering UE. Hence, it signifies that the possibility for the interfering base station to use the recommended AL on the PDCCH channel to send the scheduling information of the interfering UE is the highest.
- the known C-RNTI may be selected when blind decoding the PDCCH channel of the interfering base station and the recommended AL is first tried, to perform the blind decoding operation. Hence, it means the times of blind decoding operations that need to be performed by the victim UE are greatly reduced.
- the victim UE and the interfering UE use the same PRB set.
- the UE will become a victim UE, and the NAICS function might be used;
- the interfering base station if the PRB scheduled for the UE within the cell belongs to the set, the UE will become an interfering UE, and it is needed to send the assistance information about blind decoding the interfering UE scheduling information through a first message.
- the resource schedule of the two base stations will become rather simple, thereby reducing unnecessary system overheads.
- the PRB set may also be determined through cooperation between two cell base stations, thereby satisfying the need of flexible scheduling and enhancing resource utilization. Further, the above cooperation may be performed through an inter-base station
- Fig. 2 shows a flow diagram according to the above embodiment, comprising: S21: sending, by the base station, a first message, wherein the first message includes content associated with blind decoding scheduling information of the at least one user equipment served by the base station.
- Fig. 3 shows an apparatus 30 for reducing interference on an interfered user equipment in a wireless communication system, wherein the interfered user equipment suffers interference from at least one interfering user equipment from other cell, the apparatus 30 comprising:
- a receiving module 3001 configured to have the interfered user equipment receive a first message sent from a serving base station of the interfering user equipment, wherein the first message includes content associated with blind decoding scheduling information of the interfering user equipment;
- a blind decoding module 3002 configured to have the interfered user equipment blind decode, on a physical downlink control channel of a serving base station of the interfering user equipment, the scheduling information of the interfering user equipment based on the first message.
- Fig. 4 shows an apparatus 40 for assisting in reducing interference on a base station in a wireless communication system, wherein at least one user equipment served by the base station generates an interference with at least one user equipment of other cell, the apparatus 40 comprising:
- a sending module 4001 configured to have the base station send a first message, wherein the first message includes content associated with blind decoding scheduling information of the at least one user equipment served by the base station.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A method for reducing interference on an interfered user equipment in a wireless communication system, wherein the interfered user equipment suffers interference from at least one interfering user equipment from other cell, the method comprising: receiving, by the interfered user equipment, a first message sent from a serving base station of the interfering user equipment, wherein the first message includes content associated with blind decoding scheduling information of the interfering user equipment; blind decoding, by the interfered user equipment, on a physical downlink control channel of the serving base station of the interfering user equipment, the scheduling information of the interfering user equipment based on the first message.
Description
Method for Network- Assisted Interference Suppression
FIELD OF THE INVENTION The present invention relates to the field of communication technology, and more specifically, relates to the field of a wireless communication technology.
BACKGROUND OF THE INVENTION
In the field of wireless communication, inter-cell interference is always a hot issue in research in recent years. In particular, with the increasingly wider application of the heterogeneous network structure, it has become an imminent practical problem as to how to solve the inter-cell interference caused by a large-power macro cell to a low power micro cell. Many pertinent solutions have been proposed in the industry, for example, in the 3 GPP specifications, approaches such as inter-cell interference coordination (ICIC) technology are employed to reduce the impact of inter-cell interference on wireless communication.
However, with further growth of wireless traffics, particularly wireless data traffics, the demand on the capacity of a wireless communication system also rises. A higher cell density and a higher spectrum efficiency have become an objective that must be realized. Accordingly, co-channel interference gradually becomes a major disadvantageous factor deciding system performance, which has no discrimination for subscribers suffering inter-cell interference or subscribers within co-scheduled cells. In order to solve the co-channel interference issue, extensive study has been conducted in the industry. The results show that considerable performance gains may be provided by performing interference suppression/ cancellation at a receive end. Therefore, the 3GPP has taken NAICS (Network-Assisted Interference Cancellation Suppression) as a study orientation for LTE system evolution. In a typical NAICS application scenario, a victim user equipment (or shortly referred to as victim UE) suffers from a co-channel interference from a neighboring cell due to using the same physical resource blocks (or shortly referred to as PRBs) as some user equipments in a nearby neighboring cell. Apparently, in order to implement NAICS on the victim UE, the victim UE has to know downlink transmission
parameters of the neighboring cell so as to perform corresponding cancellation/ suppression operations. However, in the existing 3 GPP specifications, the solution for this step is sending semi- static parameters therein to the victim UE by higher layer signaling, while the remaining dynamic parameters, typically, parameters such as scheduling information of interfering user equipments in the neighboring cell, are obtained by the victim UE through blind decoding the information of the physical downlink control channel (PDCCH) of the neighboring cell, namely, the victim UE needs to blind decode the information in the downlink control indicator (DCI) part of the PDCCH of the neighboring cell. Apparently, considering the number of UEs likely generating interference and the dynamic variation of the scheduling information, the times of blind decoding by the victim UE would be unbelievable. This seemingly simple step will become very difficult in implementation. Correspondingly, it will dramatically increase the complexity for UE design such that it cannot be used practically. Therefore, that solution has to be improved.
An objective of the present invention is to seek for a novel NAICS method that enables the victim UE to obtain corresponding scheduling information with reduced times of blind decoding the PDCCH operations, thereby implementing the NAIC function at the UE side in a simpler manner; besides, the method has to be compatible with the existing specifications to the utmost extent, avoiding too much modification to the existing protocols.
SUMMARY OF THE INVENTION In order to solve the above problems in the prior art, the present invention proposes a novel NAICS method. By devising a dedicated DCI format in a CSS (common searching space) for passing the information about assistive blind decoding operations to the victim UE, the blind decoding times that need to be performed by the victim UE can be effectively reduced.
Specifically, according to a first aspect of the present invention, there is provided a method for reducing interference on an interfered user equipment in a wireless communication system, wherein the interfered user equipment suffers interference from at least one interfering user equipment from other cell, the method comprising:
receiving, by the interfered user equipment, a first message sent from a serving base station of the interfering user equipment, wherein the first message includes content associated with blind decoding scheduling information of the interfering user equipment; blind decoding, by the interfered user equipment, on a physical downlink control channel of the serving base station of the interfering user equipment, the scheduling information of the interfering user equipment based on the first message.
Preferably, the first message is downlink control information. More preferably, the first message is sent through a common searching space.
More preferably, the content associated with blind decoding scheduling information of the interfering user equipment includes: a cell-radio network temporary indicator of the interfering user equipment; a recommended aggregation level of the interfering user equipment, wherein the recommended aggregation level represents an aggregation level most preferably configured by the serving base station of the interfering user equipment.
More preferably, the interfered user equipment and the interfering user equipment use a same set of physical resource blocks.
More preferably, the same set of physical resource blocks is determined by cooperation between a serving base station of the interfered user equipment and the serving base station of the interfering user equipment.
More preferably, the same set of physical resource blocks is determined by cooperation between the serving base station of the interfered user equipment and the serving base station of the interfering user equipment through a X2 interface message. According to a second aspect of the present invention, there is provided a method for assisting in reducing interference on a base station in a wireless communication system, wherein at least one user equipment served by the base station generates an interference with at least one user equipment of other cell, the method comprising: sending, by the base station, a first message, wherein the first message includes
content associated with blind decoding scheduling information of the at least one user equipment served by the base station.
Preferably, the first message is downlink control information.
More preferably, the first message is sent through a common searching space.
More preferably, the content associated with blind decoding scheduling information of the at least one user equipment served by the base station includes: a cell-radio network temporary indicator of the at least one user equipment served by the base station; a recommended aggregation level of the at least one user equipment served by the base station, wherein the recommended aggregation level represents an aggregation level most preferably configured by the base station. More preferably, the at least one user equipment served by the base station and the at least one user equipment in other cell use a same set of physical resource blocks.
More preferably, the same set of physical resource blocks is determined by cooperation between the base station and a servicing base station of the at least one user equipment in other cell.
More preferably, the same set of physical resource blocks is determined by cooperation between the base station and the servicing base station of the at least one user equipment in other cell through a X2 interface message.
According to a third aspect of the present invention, there is provided an apparatus for reducing interference on an interfered user equipment in a wireless communication system, wherein the interfered user equipment suffers interference from at least one interfering user equipment from other cell, the apparatus comprising: a receiving module configured to have the interfered user equipment receive a first message sent from a serving base station of the interfering user equipment, wherein the first message includes content associated with blind decoding scheduling information of the interfering user equipment; a blind decoding module configured to
have the interfered user equipment blind decode, on a physical downlink control channel of the serving base station of the interfering user equipment, the scheduling information of the interfering user equipment based on the first message. According to a fourth aspect of the present invention, there is provided an apparatus for assisting in reducing interference on a base station in a wireless communication system, wherein at least one user equipment served by the base station generates an interference with at least one user equipment of other cell, the apparatus comprising: a sending module configured to have the base station send a first message, wherein the first message includes content associated with blind decoding scheduling information of the at least one user equipment served by the base station.
In the present invention, by devising a new DCI in the CSS, the interfering base station may pass corresponding parameters of the interfering UE to a victim UE, such that the victim UE may obtain schedule parameters of the interfering UE through less blind decoding operations, thereby implementing a NAICS function; in a preferred solution, a UE generating co-channel interference may also be determined through a simple inter-base station cooperation, which further simplifies the working flow of the system; besides, the present invention is compatible with the existing specifications to the utmost extent, which avoids too much modification to the protocol, thereby achieving the objective of the present invention.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS Other features, objectives and advantages of the present invention will become more apparent through the following detailed description of the non-limiting embodiments with reference to the following drawings, wherein:
Fig. 1 shows a flow diagram of a method for reducing interference on an interfered user equipment in a wireless communication system according to the present invention;
Fig. 2 shows a flow diagram of a method for assisting in reducing interference on a base station in a wireless communication system according to the present invention;
Fig. 3 shows a block diagram of an apparatus for reducing interference on an interfered user equipment in a wireless communication system according to the present invention;
Fig. 4 shows a block diagram of an apparatus for assisting in reducing interference on a base station in a wireless communication system according to the present invention. In the accompanying drawings, the same or similar reference numerals indicate the same or similar step features or means/modules.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the specific description of the following preferred embodiments, the appended drawings constituting a part of the present invention will be referenced. The appended drawings illustrate exemplarily specific embodiments capable of implementing the present invention. The exemplary embodiments do not intend to exhaust all embodiments according to the present invention. It would be appreciated that without departing from the scope of the present invention, other embodiments may be used, or structural or logical modifications may be performed. Therefore, the following specific description is not limitative, and the scope of the present invention is defined by the appended claims. Firstly, in an application scenario of the present invention, there present a victim
UE which would be co-channel interfered by some UEs (referred as interfering UEs) in a neighboring cell as using the same PRB as with these interfering UEs. Therefore, the victim UE needs to perform a blind decoding operation on a PDCCH channel of a serving base station (referred as an interfering base station) of these interfering UEs, so as to obtain corresponding scheduling information of the interfering UEs for later use in a NAICS function.
On this basis, according to one embodiment of the present invention, there is provided a method of reducing interference on a victim UE. Specifically, the victim
UE first receives a first message sent from an interfering base station, which first message includes information that may assist the victim UE to perform a blind decoding operation; then, based on the received assistance information, performs a pertinent blind decoding operation to obtain corresponding scheduling information through less blind decoding times.
Preferably, the first information may be a novel DCI located in a CSS of a PDCCH channel of an interfering base station. The DCI is not specific scheduling information of a certain UE, but blind decoding assistance information of a set of UEs, i.e., all interfering UEs.
Further, the included assistance information may include:
- cell-radio network temporary indicator (C-RNTI) of an interfering UE; and - recommended aggregation level (AL) of the interfering UE, wherein the recommended AL represents the AL that is most preferably configured by an interfering base station for the interfering UE. Apparently, it means that the possibility for the interfering base station to use the recommended AL on the PDCCH channel to send the scheduling information of the interfering UE is the highest.
Therefore, for the victim UE, when the C-RNTI of the interfering UE and the recommended AL are known, the known C-RNTI may be selected when blind decoding the PDCCH channel of the interfering base station and the recommended AL is first tried, to perform the blind decoding operation. Apparently, it means the times of blind decoding operations that need to be performed by the victim UE are greatly reduced.
For further simplification, it may also be limited that the victim UE and the interfering UE use the same PRB set. In this way, for the serving base station of the cell where the victim UE is located, if the PRB scheduled for a certain UE within the cell belongs to the set, the UE will become a victim UE, and the NAICS function might be used; correspondingly, for the interfering base station, if the PRB scheduled for a certain UE within the cell belongs to the set, the UE will become an interfering UE, and it is needed to send the assistance information about blind decoding the
interfering UE scheduling information through a first message. In this way, the resource schedule of the two base stations will become rather simple, thereby reducing unnecessary system overheads. Preferably, the PRB set may also be determined through cooperation between two cell base stations, thereby satisfying the need of flexible scheduling and enhancing resource utilization.
Further, the above cooperation may be performed through an inter-base station X2 interface message. The advantage of such design is that the existing signaling system can be followed to the utmost extent, without a need of using a brand-new signaling system.
Fig. 1 shows a flow diagram according to the above embodiment, comprising: Sll: receiving, by the interfered user equipment, a first message sent from a serving base station of the interfering user equipment, wherein the first message includes content associated with blind decoding scheduling information of the interfering user equipment;
S12: blind decoding, by the interfered user equipment, on a physical downlink control channel of a serving base station of the interfering user equipment, the scheduling information of the interfering user equipment based on the first message.
Correspondingly, according to another embodiment of the present invention, there is provided a method of assisting in reducing interference on an interfering base station. Specifically, the interfering base station sends a first message that includes information which may assist a victim UE to perform a blind decoding operation.
Preferably, the first information may be a novel DCI located in a CSS of a PDCCH channel of an interfering base station. The DCI is not specific scheduling information of a certain UE, but blind decoding assistance information of a set of UEs, i.e., all interfering UEs.
Further, the included assistance information may include:
- cell-radio network temporary indicator (C-RNTI) of an interfering UE; and
- recommended aggregation level (AL) of the interfering UE, wherein the recommended AL represents the AL that is most preferably configured by an interfering base station for the interfering UE. Apparently, it signifies that the possibility for the interfering base station to use the recommended AL on the PDCCH channel to send the scheduling information of the interfering UE is the highest.
Similarly, for the victim UE, when the C-RNTI of the interfering UE and the recommended AL are known, the known C-RNTI may be selected when blind decoding the PDCCH channel of the interfering base station and the recommended AL is first tried, to perform the blind decoding operation. Apparently, it means the times of blind decoding operations that need to be performed by the victim UE are greatly reduced.
For further simplification, it may also be limited that the victim UE and the interfering UE use the same PRB set. In this way, for the serving base station of the cell where the victim UE is located, if the PRB scheduled for a certain UE within the cell belongs to the set, the UE will become a victim UE, and the NAICS function might be used; correspondingly, for the interfering base station, if the PRB scheduled for the UE within the cell belongs to the set, the UE will become an interfering UE, and it is needed to send the assistance information about blind decoding the interfering UE scheduling information through a first message. In this way, the resource schedule of the two base stations will become rather simple, thereby reducing unnecessary system overheads.
Preferably, the PRB set may also be determined through cooperation between two cell base stations, thereby satisfying the need of flexible scheduling and enhancing resource utilization. Further, the above cooperation may be performed through an inter-base station
X2 interface message. The advantage of such design is that the existing signaling system can be followed to the utmost extent, without a need of using a brand-new signaling system.
Fig. 2 shows a flow diagram according to the above embodiment, comprising: S21: sending, by the base station, a first message, wherein the first message includes content associated with blind decoding scheduling information of the at least one user equipment served by the base station.
Hereinafter, apparatuses corresponding to the above methods according to the present invention will be introduced with reference to block diagrams. Because there are correspondence relationships between the unit/means features therein and the step features in the methods, they will not be detailed here.
Fig. 3 shows an apparatus 30 for reducing interference on an interfered user equipment in a wireless communication system, wherein the interfered user equipment suffers interference from at least one interfering user equipment from other cell, the apparatus 30 comprising:
a receiving module 3001 configured to have the interfered user equipment receive a first message sent from a serving base station of the interfering user equipment, wherein the first message includes content associated with blind decoding scheduling information of the interfering user equipment; and
a blind decoding module 3002 configured to have the interfered user equipment blind decode, on a physical downlink control channel of a serving base station of the interfering user equipment, the scheduling information of the interfering user equipment based on the first message.
Fig. 4 shows an apparatus 40 for assisting in reducing interference on a base station in a wireless communication system, wherein at least one user equipment served by the base station generates an interference with at least one user equipment of other cell, the apparatus 40 comprising:
a sending module 4001 configured to have the base station send a first message, wherein the first message includes content associated with blind decoding scheduling information of the at least one user equipment served by the base station.
The embodiments of the present invention have been described above. However, the present invention is not limited to a specific system, apparatus, or a specific protocol. Those skilled in the art may make various transformations or modifications
within the scope defined by the appended claims.
A person of common skill in the art would appreciate and implement other variations of the disclosed embodiments through studying the description, the disclosed contents, the accompanying drawings and the appended claims. In the claims, the term "comprise" does not exclude other elements or steps, and the term "one" does not exclude plurality. In the present invention, "first" and "second" only denote names, do not represent an order relationship. In practical application of the invention, one part may perform the functions of a plurality of technical features that are recited in the claims. No reference numerals in the claims shall be understood as a limitation of scope.
Claims
1. A method for reducing interference on an interfered user equipment in a wireless communication system, wherein the interfered user equipment suffers interference from at least one interfering user equipment from other cell, the method comprising:
a. receiving, by the interfered user equipment, a first message sent from a serving base station of the interfering user equipment, wherein the first message includes content associated with blind decoding scheduling information of the interfering user equipment;
b. blind decoding, by the interfered user equipment, on a physical downlink control channel of the serving base station of the interfering user equipment, the scheduling information of the interfering user equipment based on the first message.
2. The method according to claim 1, wherein the first message is downlink control information.
3. The method according to claim 2, wherein the first message is sent through a common searching space.
4. The method according to claim 1, wherein the content associated with blind decoding scheduling information of the interfering user equipment includes:
a cell-radio network temporary indicator of the interfering user equipment;
a recommended aggregation level of the interfering user equipment, wherein the recommended aggregation level represents an aggregation level most preferably configured by the serving base station of the interfering user equipment.
5. The method according to claim 1, wherein the interfered user equipment and the interfering user equipment use a same set of physical resource blocks.
6. The method according to claim 5, wherein the same set of physical resource blocks is determined by cooperation between a serving base station of the interfered user equipment and the serving base station of the interfering user equipment.
7. The method according to claim 6, wherein the same set of physical resource blocks is determined by cooperation between the serving base station of the interfered user equipment and the serving base station of the interfering user equipment through a X2 interface message.
8. A method for assisting in reducing interference on a base station in a wireless communication system, wherein at least one user equipment served by the base station generates an interference with at least one user equipment of other cell, the method comprising:
A. sending, by the base station, a first message, wherein the first message includes content associated with blind decoding scheduling information of the at least one user equipment served by the base station.
9. The method according to claim 8, wherein the first message is downlink control information.
10. The method according to claim 9, wherein the first message is sent through a common searching space.
11. The method according to claim 8, wherein the content associated with blind decoding scheduling information of the at least one user equipment served by the base station includes:
a cell-radio network temporary indicator of the at least one user equipment served by the base station;
a recommended aggregation level of the at least one user equipment served by the base station, wherein the recommended aggregation level represents an aggregation level most preferably configured by the base station.
12. The method according to claim 8, wherein the at least one user equipment served by the base station and the at least one user equipment in other cell use a same set of physical resource blocks.
13. The method according to claim 12, wherein the same set of physical resource
blocks is determined by cooperation between the base station and a serving base station of the at least one user equipment in other cell.
14. The method according to claim 13, wherein the same set of physical resource blocks is determined by cooperation between the base station and the serving base station of the at least one user equipment in other cell through a X2 interface message.
15. An apparatus for reducing interference on an interfered user equipment in a wireless communication system, wherein the interfered user equipment suffers interference from at least one interfering user equipment from other cell, the apparatus comprising:
a receiving module configured to have the interfered user equipment receive a first message sent from a serving base station of the interfering user equipment, wherein the first message includes content associated with blind decoding scheduling information of the interfering user equipment;
a blind decoding module configured to have the interfered user equipment blind decode, on a physical downlink control channel of the serving base station of the interfering user equipment, the scheduling information of the interfering user equipment.
16. An apparatus for assisting in reducing interference on a base station in a wireless communication system, wherein at least one user equipment served by the base station generates an interference with at least one user equipment of other cell, the apparatus comprising:
a sending module configured to have the base station send a first message, wherein the first message includes content associated with blind decoding scheduling information of the at least one user equipment served by the base station.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410032810.5 | 2014-01-23 | ||
| CN201410032810.5A CN104811944B (en) | 2014-01-23 | 2014-01-23 | A kind of network assistance disturbance restraining method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015110911A1 true WO2015110911A1 (en) | 2015-07-30 |
Family
ID=52875723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB2015/000150 WO2015110911A1 (en) | 2014-01-23 | 2015-01-08 | Method for network-assisted interference suppression |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN104811944B (en) |
| TW (1) | TW201601477A (en) |
| WO (1) | WO2015110911A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106487488A (en) * | 2015-08-25 | 2017-03-08 | 电信科学技术研究院 | The sending, receiving method of control signaling, the network equipment and receiving device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011052869A1 (en) * | 2009-10-28 | 2011-05-05 | Lg Electronics Inc. | Method and apparatus for mitigating inter-cell interference in wireless communication system |
| WO2013066935A1 (en) * | 2011-11-02 | 2013-05-10 | Qualcomm Incorporated | Blindly decoding interfering cell pdcch to acquire interfering cell pdsch transmission information |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9106378B2 (en) * | 2009-06-10 | 2015-08-11 | Qualcomm Incorporated | Systems, apparatus and methods for communicating downlink information |
-
2014
- 2014-01-23 CN CN201410032810.5A patent/CN104811944B/en active Active
-
2015
- 2015-01-07 TW TW104100403A patent/TW201601477A/en unknown
- 2015-01-08 WO PCT/IB2015/000150 patent/WO2015110911A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011052869A1 (en) * | 2009-10-28 | 2011-05-05 | Lg Electronics Inc. | Method and apparatus for mitigating inter-cell interference in wireless communication system |
| WO2013066935A1 (en) * | 2011-11-02 | 2013-05-10 | Qualcomm Incorporated | Blindly decoding interfering cell pdcch to acquire interfering cell pdsch transmission information |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104811944A (en) | 2015-07-29 |
| CN104811944B (en) | 2018-08-21 |
| TW201601477A (en) | 2016-01-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3592030B1 (en) | Method for sending and receiving control information, and related device | |
| US20200178227A1 (en) | Base station, method for radio communication, radio communication system, and radio terminal | |
| RU2709285C1 (en) | Resource planning method, scheduler, base station, terminal and system | |
| WO2016146073A1 (en) | Ue supporting multi-user superposition, method and device of base station | |
| CN103068049B (en) | Method of avoiding interference to device-to-device (D2D) communications caused by cellular communications in honeycomb and D2D hybrid network | |
| US10314089B2 (en) | Method performed by a user equipment, method performed by an enodeb, user equipment and enodeb | |
| EP3668219B1 (en) | Method and device for transmitting downlink control channel | |
| KR20190138895A (en) | Signaling of Frequency Domain Resource Allocation | |
| US9271273B2 (en) | Base station, method for radio communication, program, radio communication system, and radio terminal | |
| RU2669784C1 (en) | Pdcch initiating, suitable for mtc devices | |
| CN104137435B (en) | Reduce the method and apparatus of inter-cell interference in the multi-cell wireless communication system that cooperates | |
| EP2503812A1 (en) | Allocation method and device for control channel elements | |
| US11350440B2 (en) | Information transmission method, terminal apparatus, and network apparatus | |
| KR102439670B1 (en) | Transmission direction configuration method, device, and system | |
| WO2012046173A1 (en) | Feedback mapping for d2d control signals | |
| EP3193553B1 (en) | Sub-band resource determining device and method | |
| CN112399630B (en) | Communication method and device | |
| KR20160043961A (en) | Telecommunications apparatus and methods | |
| US20180191454A1 (en) | Radio network node, wireless device and methods performed therein | |
| CN109417797B (en) | Method, network node and computer storage medium for allocating resources to wireless devices | |
| JP2020523919A (en) | Signal transmission method, related device, and system | |
| WO2016177177A1 (en) | Methods and devices for sending, receiving resource allocation information for short transmission time interval communication | |
| CN105338633A (en) | Base station, user equipment and related methods | |
| KR20150065807A (en) | Apparatuses, methods, and computer programs for a receiver and a transmitter of a wireless system | |
| CN110035552A (en) | A kind of LAA dispatching method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15716861 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 15716861 Country of ref document: EP Kind code of ref document: A1 |