CN114585096B - Method and system for reducing interference through BWP switching function - Google Patents

Method and system for reducing interference through BWP switching function Download PDF

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Publication number
CN114585096B
CN114585096B CN202210479399.0A CN202210479399A CN114585096B CN 114585096 B CN114585096 B CN 114585096B CN 202210479399 A CN202210479399 A CN 202210479399A CN 114585096 B CN114585096 B CN 114585096B
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bwp
base station
activation information
signaling
information
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CN114585096A (en
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高亮
李斌
李德强
包永彬
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Shenzhen Guoren Wireless Communication Co Ltd
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Shenzhen Guoren Wireless Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The present invention relates to a method and system for reducing interference through a BWP handover function, wherein the method comprises: including periodically or when the BWP changes, communicating BWP allocation messages and BWP activation information between base stations over XN links, the BWP allocation messages including an initial BWP and a dedicated BWP, the BWP activation information including an active BWP; the base station issues an initial BWP and a special BWP to the user equipment; the base station receives the BWP allocation message and BWP activation information of the peripheral base station, compares whether the BWP activation information of the peripheral base station is consistent with the BWP activation information of the base station, and if so, switches the current BWP activation information into new BWP activation information inconsistent with the BWP activation information of the peripheral base station; the base station transmits its latest allocation message and the BWP activation information to the surrounding base stations. The invention can effectively reduce the same frequency interference between the base stations in the 5G mobile communication system and improve the use perception of users.

Description

Method and system for reducing interference through BWP switching function
Technical Field
The present invention relates to the field of 5G mobile communication technologies, and in particular, to a method and system for reducing interference through a BWP handover function.
Background
Compared with LTE, the bandwidth of a 5GNR (5 Generation New RAT) cell is much larger, and the bandwidth that the ue receives and transmits does not need to be as large as that of a 5G (NR) cell, so that there is a provision in 3GPP (Third Generation Partnership Project) protocol that the ue can transmit and receive information to and from the 5GNR cell bandwidth by adjusting to a sub-Bandwidth (BWP) of the 5GNR cell bandwidth, and periodically use the sub-Bandwidth (BWP) at low power to achieve the purpose of saving power, and thus a BWP (Band Width Part) concept is introduced.
The 5G mobile communication systems are all specified to use TDD mode according to 3GPP protocols. However, in the mobile communication system in TDD mode, the receiving and transmitting are in the same frequency channel (or carrier), i.e. the same frequency networking characteristics, so that the 5G mobile communication system inevitably generates the same frequency interference between the base stations in the system, thereby affecting the use perception of the user.
Therefore, there is a need for a method and system for reducing co-channel interference between base stations in a 5G mobile communication system in conjunction with BWP.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a method and system for reducing interference through a BWP handover function.
The invention provides a method for reducing interference through a BWP switching function, which comprises the steps that a BWP allocation message and BWP activation information are transmitted between a base station and a peripheral base station periodically through an XN link or when the BWP changes, the BWP allocation message comprises an initial BWP and a special BWP, and the BWP activation information comprises an activated BWP;
the base station issues an initial BWP and a special BWP to the user equipment;
the base station receives the BWP allocation message and the BWP activation information of the peripheral base station, compares whether the BWP activation information of the peripheral base station is consistent with the BWP activation information of the base station, and if so, switches the current BWP activation information into new BWP activation information which is inconsistent with the BWP activation information of the peripheral base station;
and the base station transmits the BWP activation information and the latest allocation message after the switching to the peripheral base station.
As a preferred technical solution, the BWP allocation message and the BWP activation message are transmitted between the base station and the neighboring base stations through an XN link, which includes XN signaling configured according to service requirements and/or coverage distance between the base stations.
As a preferred technical solution, the BWP allocation message and the BWP activation message are transferred between the base station and the neighboring base station through an XN link, which includes that the BWP information signaling and the BWP information confirmation signaling are created for transfer between the base station and the neighboring base station.
As a preferred technical solution, the base station switches the current BWP activation information to a new BWP activation information inconsistent with the BWP activation information of the neighboring base stations through RRC reconfiguration or DCI.
As a preferred technical solution, the base station issues an initial BWP and a dedicated BWP to the ue through any one of a MIB message, an SIB message, an RRC reconfiguration message, and a DCI message.
As a preferred technical solution, one user equipment configures up to four dedicated BWPs; during data service transmission, the ue can only activate one of the dedicated BWPs at a certain time as its active BWP at the current time.
The invention also provides a system for reducing interference through BWP switching function, the base station comprises a first XN interface, an identification module and a switching module; the peripheral base station comprises a second XN interface; the first XN interface and the second XN interface are connected to form an XN link between the base stations, and the XN link is used for transmitting and receiving BWP allocation messages and BWP activation information between the base stations and peripheral base stations periodically or when BWP changes; the identification module is used for inquiring the BWP activation information of the peripheral base station and comparing and identifying whether the BWP activation information of the base station is consistent with that of the peripheral base station; the switching module is used for switching the current BWP activation information of the base station into new BWP activation information inconsistent with the BWP activation information of the peripheral base station when the identification module identifies that the BWP activation information of the base station is consistent with the BWP activation information of the peripheral base station;
the user equipment comprises a receiving module, and the receiving module is used for receiving the initial BWP and the dedicated BWP issued by the base station.
As a preferred technical solution, the base station further includes a first signaling generation module and a first signaling transceiving module; the peripheral base station also comprises a second signaling generation module and a second signaling transceiving module; the first signaling generation module and the second signaling generation module are used for generating XN signaling and BWP information signaling; the other one is used for generating XN signaling and BWP information confirmation signaling; one of the first signaling transceiving module and the second signaling transceiving module is used for transceiving XN signaling and BWP information signaling, and the other one of the first signaling transceiving module and the second signaling transceiving module is used for transceiving XN signaling and BWP information confirmation signaling, so that BWP allocation information and BWP activation information are transferred between base stations, and information interaction is realized.
As a preferred technical solution, the switching module is further configured to switch the current BWP activation information to a new BWP activation information inconsistent with the BWP activation information of the neighboring base station through RRC reconfiguration or DCI of the base station.
As a preferred technical solution, the first signaling generation module is further configured to generate an MIB message, an SIB message, an RRC reconfiguration message, and a DCI message; the first signaling transceiving module is further configured to issue an initial BWP and a dedicated BWP to the user equipment through any one of the MIB message, SIB message, RRC reconfiguration message, or DCI message.
Compared with the prior art, the invention enables the base station and the peripheral base station to transfer the BWP allocation message and the BWP activation information periodically or when the BWP changes, realizes the interaction of the BWP allocation message and the BWP activation information of the base station and the peripheral base station, then the base station inquires the BWP activation information of the peripheral base station and compares the BWP activation information with the BWP activation information of the base station to determine whether the BWP activation information is consistent or not according to the received BWP allocation message and the BWP activation information of the peripheral base station, and if the BWP activation information is consistent, the base station switches the current active BWP into a new BWP activation information which is inconsistent with the BWP activation information of the peripheral base station. By the mode, the co-channel interference between the base stations in the 5G mobile communication system is reduced, and the user perception is improved.
Drawings
To further illustrate the detailed description of the present invention, exemplary embodiments of the present invention are described in more detail below with reference to the accompanying drawings, in which:
fig. 1 is a schematic diagram illustrating information interaction between a base station and a peripheral base station in a method and system for reducing interference through a BWP handover function according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating that a base station of a method and system for reducing interference through a BWP handover function issues an initial BWP and a dedicated BWP to a user equipment according to an embodiment of the present invention;
fig. 3 is a block diagram of a base station of a system for reducing interference through a BWP handover function according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a peripheral base station of a system for reducing interference through a BWP handover function according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a user equipment of a system for reducing interference through a BWP handover function according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating a method for reducing interference through a BWP switching function according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
Referring to fig. 1 and fig. 2, a system for reducing interference through a BWP handover function according to an embodiment of the present invention includes a base station 10, a peripheral base station 20, and a user equipment 30. The base station 10 is in contact with the peripheral base stations 20 and the user equipment 30, respectively. The base station 10 and the peripheral base stations 20 are bidirectional information interaction; the base station 10 and the ue 30 issue information in one direction, that is, the base station 10 issues information to the ue 30.
Referring to fig. 1, fig. 3 and fig. 4, the base station 10 includes a first XN interface 11, an identifying module 13, a switching module 15, a first signaling generating module 17 and a first signaling transceiving module 19. The peripheral base station 20 includes a second XN interface 21, a second signaling generation module 23 and a second signaling transceiver module 25.
In this embodiment, the first XN interface 11 and the second XN interface 21 are connected to form an XN link between the base station 10 and the peripheral base station 20, and the XN link is used for transferring the BWP allocation message and the BWP activation information between the base station 10 and the peripheral base station 20 periodically or when the BWP changes.
The identifying module 13 is used for querying and finding the BWP activation information transmitted by the neighboring base station 20, and comparing and identifying whether the BWP activation information of the base station 10 and the neighboring base station 20 are consistent.
The switching module 15 is configured to switch the current BWP activation information of the base station 10 to a new BWP activation information inconsistent with the BWP activation information of the neighboring base stations 20 when the identification module 13 identifies that the BWP activation information of the base station 10 and the neighboring base stations 20 are consistent; specifically, the switching module 15 is further configured to switch the current BWP activation information to a new BWP activation information inconsistent with the BWP activation information of the neighboring base station 20 through RRC reconfiguration or DCI of the base station 10.
In the present embodiment, when the base station 10 interacts BWP information with the neighboring base stations 20 in two directions, there are the following two interaction methods:
the first mode is as follows: the first signaling generation module 17 and the second signaling generation module 23 are both configured to generate XN signaling, and a field for performing BWP information interaction is added on the basis of the two XN signaling generated by the first signaling generation module 17 and the second signaling generation module 23, and the first signaling transceiver module 19 and the second signaling transceiver module 25 transmit the fields to each other, so as to perform interaction of BWP allocation message and BWP activation message.
The second mode is as follows: one of the first signaling generation module 17 and the second signaling generation module 23 is used for BWP information signaling; the other of which is used to generate BWP information acknowledgment signaling. That is, the first signaling generation module 17 and the second signaling generation module 23 respectively create BWP information signaling and BWP information acknowledgement signaling, and one of the first signaling transceiver module 19 and the second signaling transceiver module 25 is used for transceiving BWP information signaling, and the other is used for transceiving BWP information acknowledgement signaling to transmit BWP allocation message and BWP activation message, thereby implementing information interaction.
Referring to fig. 2 and 5, the user equipment 30 includes a receiving module 31, where the receiving module 31 is configured to receive the initial BWP and the dedicated BWP issued by the base station 10.
In particular, the first signaling generation module 17 is also used to generate MIB messages, SIB messages, RRC reconfiguration messages and DCI messages. The first signaling transceiver module 19 is further configured to issue the initial BWP and the dedicated BWP to the user equipment 30 through any one of the MIB message, SIB message, RRC reconfiguration message or DCI message.
The method for reducing interference through a BWP handover function in the system for reducing interference through a BWP handover function according to the present invention is described in detail with reference to fig. 6, where the method includes the following steps executed in sequence:
s3, the BWP allocation message and the BWP activation information are transmitted between the base station 10 and the peripheral base station 20 periodically through an XN link or when the BWP changes; the BWP allocation message includes an initial BWP and a dedicated BWP, and the BWP activation information includes an active BWP;
s5, the base station 10 issues an initial BWP and a special BWP to the user equipment 30;
s7, the base station 10 receives the BWP allocation message and the BWP activation information of the peripheral base station 20, compares whether the BWP activation information of the peripheral base station 20 is consistent with the BWP activation information of the base station 10, and if so, the base station 10 switches the current BWP activation information into a new BWP activation information inconsistent with the BWP activation information of the peripheral base station 20;
s9, the base station 10 transmits the BWP activation information and the latest allocation message after the handover to the neighboring base station 20.
In this embodiment, the initial BWP is the BWP randomly used by the user equipment 30 in the initial access phase. Dedicated BWP is mainly used for data traffic transmission. The active BWP is to select a qualified BWP from the initial BWP and the dedicated BWP at a certain time and activate the BWP. The initial BWP is mainly used for the user equipment 30 to receive RMSI, OSI initiated random access, etc. Whereas dedicated BWPs are mainly used for data traffic transmission. Specifically, one user equipment 30 configures up to four dedicated BWPs; in data traffic transmission, the user equipment 30 can activate only one of the dedicated BWPs at a time as the active BWP for its current time.
The above steps are that the base station 10 and the neighboring base station 20 periodically or when the BWP changes, the BWP allocation message and the BWP activation information are transmitted, so as to realize the interaction between the BWP allocation message and the BWP activation information of the base station 10 and the neighboring base station 20, then the base station 10 inquires the BWP activation information of the neighboring base station 20 according to the received BWP allocation message and BWP activation information of the neighboring base station 20 and compares the information with the BWP activation information of the base station 10 to see whether the information is consistent, and if so, the base station 10 switches the currently activated BWP to a new BWP activation information that is inconsistent with the BWP activation information of the neighboring base station 20. By the way of switching the BWP activation information, the base station 10 and the neighboring base station 20 respectively perform services for different active BWPs, and if the active BWP to be switched is the initial BWP, the access channel interference can be reduced; if the active BWP for handover is a dedicated BWP, traffic channel interference may be reduced, thereby reducing co-channel interference between base stations 10 in the 5G mobile communication system and improving user perception.
Specifically, in step S3, the method for transferring the BWP allocation message and the BWP activation message between the base station 10 and the peripheral base station 20 through the XN link includes two ways:
first, the BWP allocation message and the BWP activation message are transferred by adding a field for performing BWP information interaction to the configured XN signaling base station between the base station 10 and the neighboring base station 20 according to the service requirement and/or the XN signaling configured in the coverage distance.
Second, the base station 10 and the neighboring base station 20 respectively create a BWP information signaling and a BWP information confirmation signaling and send them to each other, so as to transfer the BWP allocation message and the BWP activation message.
In step S5, the base station 10 sends the initial BWP and the dedicated BWP to the ue 30 through any one of the MIB message, SIB message, RRC reconfiguration message, and DCI message.
In step S7, in the specific operation of the base station 10 to switch the current BWP activation information, the base station 10 may switch through RRC reconfiguration or DCI.
Specifically, the RRC reconfiguration mode switches to: the ID of the first downlink active BWP and the ID of the first uplink active BWP in the BWP activation information are directly changed. For example, the ID of the first downlink activation BWP and the ID of the first uplink activation BWP in the current BWP activation information of the base station 10 and the neighbor base station 20 are both 1, and the handover is completed by changing the ID of the first downlink activation BWP and the ID of the first uplink activation BWP of the current BWP activation information of the base station 10 to 2.
For the mode switching of DCI (Downlink Control Information), the DCI comprises resource allocation Information, and DCI formats 0-1 and 1-1 are used for scheduling resources. Specifically, DCI format 0-1 indicates to schedule uplink data, and format 1-1 indicates to schedule downlink data; the DCI formats 0-1 and 1-1 include a Bandwidth part indicator field (Bandwidth part indicator field), and when the Bandwidth part indicator fields of the DCI formats 0-1 and 1-1 of the neighboring base station 20 activating the BWP do not match the Bandwidth part indicator fields of the DCI formats 0-1 and 1-1 of the BWP currently activated by the base station 10, the BWP handover is activated.
The above examples merely represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications, such as combinations of different features in various embodiments, may be made without departing from the spirit of the invention, and these are within the scope of the invention.

Claims (10)

1. A method for interference reduction with a BWP handover function, the method comprising the steps of:
the method comprises the steps that a BWP allocation message and BWP activation information are transmitted between a base station and a peripheral base station periodically through an XN link or when the BWP changes, the BWP allocation message comprises an initial BWP and a special BWP, and the BWP activation information comprises the activated BWP;
the base station issues an initial BWP and a special BWP to the user equipment;
the base station receives the BWP allocation message and BWP activation information of the peripheral base station, compares whether the BWP activation information of the peripheral base station is consistent with the BWP activation information of the base station, and if so, switches the current BWP activation information into new BWP activation information inconsistent with the BWP activation information of the peripheral base station;
and the base station transmits the BWP activation information and the latest allocation message after the switching to the peripheral base station.
2. The method for reducing interference through a BWP handover function according to claim 1, wherein the BWP assignment message and the BWP activation message are transmitted between the base station and the surrounding base stations through XN links, including XN signaling configured according to service requirements and/or coverage distance between the base stations.
3. The method for reducing interference through a BWP handover function according to claim 1, wherein the BWP allocation message and BWP activation information are communicated between the base station and the neighboring base stations via XN link, including the BWP information signaling and BWP acknowledgement signaling between the base station and the neighboring base stations.
4. The method of claim 1, wherein the base station switches the current BWP activation information to a new BWP activation information inconsistent with the BWP activation information of the neighboring base stations through RRC reconfiguration or DCI.
5. The method for reducing interference through the BWP handover function of claim 1, wherein the base station issues an initial BWP and a dedicated BWP to the user equipment through any one of MIB message, SIB message, RRC reconfiguration message, and DCI message.
6. The method of reducing interference through a BWP handover function according to claim 5, wherein one said user equipment configures up to four said dedicated BWPs; when data service is transmitted, the user equipment can only activate one of the dedicated BWPs at a certain time as the active BWP at the current time.
7. A system for reducing interference through a BWP handover function, comprising a base station, a peripheral base station, and a user equipment,
the base station comprises a first XN interface, an identification module and a switching module; the peripheral base station comprises a second XN interface; the first XN interface and the second XN interface are connected to form an XN link between the base stations, and the XN link is used for transmitting and receiving BWP allocation messages and BWP activation information between the base stations and peripheral base stations periodically or when BWP changes; the BWP allocation message includes an initial BWP and a dedicated BWP, and the BWP activation information includes an active BWP; the identification module is used for inquiring the BWP activation information of the peripheral base station and comparing and identifying whether the BWP activation information of the base station is consistent with that of the peripheral base station; the switching module is used for switching the current BWP activation information of the base station into new BWP activation information inconsistent with the BWP activation information of the peripheral base station when the identification module identifies that the BWP activation information of the base station is consistent with the BWP activation information of the peripheral base station; the XN link is also used for transmitting the BWP activation information after the switching of the base station and the latest BWP allocation message to the peripheral base station;
the user equipment comprises a receiving module, and the receiving module is used for receiving the initial BWP and the dedicated BWP issued by the base station.
8. The system for reducing interference through a BWP handover function of claim 7, wherein said base station further includes a first signaling generation module and a first signaling transceiving module; the peripheral base station also comprises a second signaling generation module and a second signaling transceiving module; the first signaling generation module and the second signaling generation module are used for generating XN signaling and BWP information signaling; the other one is used for generating XN signaling and BWP information confirmation signaling; one of the first signaling transceiving module and the second signaling transceiving module is used for transceiving XN signaling and BWP information signaling, and the other one of the first signaling transceiving module and the second signaling transceiving module is used for transceiving XN signaling and BWP information confirmation signaling, so that BWP allocation information and BWP activation information are transferred between base stations, and information interaction is realized.
9. The system for reducing interference through a BWP handover function according to claim 7, wherein the handover module is further configured to handover the current BWP activation information to a new BWP activation information inconsistent with the BWP activation information of the neighboring base stations through RRC reconfiguration or DCI of the base station.
10. The system for reducing interference through a BWP switching function of claim 8 wherein said first signaling generation module is further for generating MIB messages, SIB messages, RRC reconfiguration messages and DCI messages; the first signaling transceiving module is further configured to issue an initial BWP and a dedicated BWP to the ue through any one of the MIB message, SIB message, RRC reconfiguration message, or DCI message.
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