A method of avoiding the base station IAB cross jamming
Technical field
The present invention relates to 5G NR (New Radio) wireless communication technology field more particularly to a kind of base stations IAB
The side of cross jamming is avoided under (Integrated Access and Backhaul, access and passback integrated base station) scene
Method.
Background technique
Compared with LTE, 5G NR technology is able to use bigger bandwidth, can be used for example millimeter wave frequency band, and can be with
Using extensive antenna and multiple-beam system, therefore 5G is capable of providing higher system velocity, develops and apply IAB for 5G NR
Base station provides condition.The so-called base station IAB is exactly that the base station is integrated with wireless access links and wireless backhaul links, wherein connecing
Incoming link communication link between the base station UE and IAB, communication link of the wireless backhaul link between the base station IAB carry out data
Passback, therefore the base station IAB does not need wire transmission network and carries out data back.Based on this, the base station IAB is easier to be deployed in intensive
Scene alleviates the burden of deployment cable transmission network network.
As shown in Figure 1, the base station IAB provides the wireless backhaul of wireless access and access service for UE.The base station IAB donor
(the ownership base station IAB) provides wireless backhaul function to the base station IAB, and provides the interface of UE and core net.It can from Fig. 1
Out, the base station IAB donor and core net have wired connection, do not have wired connection between the base station IAB and core net, and the base station IAB is logical
It crosses wireless backhaul links and is connected to the base station IAB donor, so that UE be made to be attached with core net.
In addition, the base station IAB is properly termed as father's section if a base station IAB controls and dispatch another base station IAB
Point, the i.e. base station IAB are the father node of another base station IAB, as shown in Figure 1, the base station IAB 2 is properly termed as father node, it is
The father node of the base station IAB 3.If a base station IAB, under the control of another base station IAB, which can claim
For child node, i.e. the base station the IAB child node that is another base station IAB.As shown in Figure 1, the base station IAB 1, the base station IAB 2, IAB
Base station 3 can be referred to as child node, and wherein the base station IAB 1 and the base station IAB 2 are the child node of the base station IAB donor, the base station IAB
3 be the child node of the base station IAB 2.Obviously, the same base station IAB may be both father node and child node.Also, IAB
The base station donor can only be father node, and the base station IAB donor is the father node of the base station IAB 1 and the base station IAB 2 in Fig. 1.
For the base station IAB, it is contemplated that semiduplex limitation, the base station IAB cannot connect simultaneously in backhaul link and access link
Data are received and sent, i.e., when the base station IAB receives the backhaul link data of father node, data cannot be sent in access link, when
The base station IAB cannot receive data in access link when backhaul link sends data to father node.
As shown in Fig. 2, when the base station IAB 1 receives its father node, (base station IAB donor, can be considered as in topological structure
The base station IAB equivalent processes) backhaul link data when, data cannot be sent by access link to UE1.When the base station IAB 2 to its
When father node (base station IAB donor) sends data by backhaul link, the number that UE1 is sent by access link cannot be received
According to.
In view of the fulfillment capability of current hardware, the base station IAB can receive the data of backhaul link and access link simultaneously,
Or the data of backhaul link and access link are sent simultaneously.UE meeting therefore, because semiduplex limitation, between the base station IAB
Lead to the problem of uplink and downlink cross jamming.The transmission data of so-called UE uplink and downlink cross jamming, i.e., the UE of one cell can be to another
The UE of one cell receives data and generates interference.So after the topological relation between the base station IAB determines, the base station IAB and his father
Cross jamming may be generated between node and child node.As shown in figure 3, when the serviced UE3 in the base station IAB donor sends number
According to when, the base station IAB 2 can only the backhaul link between the base station IAB donor send data, at this point, if 2 institute of the base station IAB
The UE4 of service receives the data of its transmission, then the transmission data of the serviced UE3 in the base station IAB donor can take the base station IAB 2
The reception data of business UE4 generate cross jamming;When the base station IAB donor sends data to serviced UE1, the base station IAB 1 can only
Backhaul link between the base station IAB donor receives data, at this point, if the UE2 that is serviced of the base station IAB 1 is to the base station IAB
1 sends data, then the transmission data of the serviced UE2 in the base station IAB 1 can produce the reception data of the serviced UE1 in the base station IAB donor
Raw cross jamming.
In conclusion UE uplink and downlink has occurred between the base station IAB donor and the base station its child node IAB 1 and the base station IAB 2
The transmission data of the serviced UE of cross jamming, i.e. father node can UE serviced to child node reception data generate cross jamming,
Son save service UE transmission data can UE serviced to father node reception data generation cross jamming, so the base station IAB and
Cross jamming cell each other between its father node and child node.Therefore, it is necessary to solve the uplink and downlink of UE in the scene of the base station IAB to intersect
The problem of interference, improves user experience to promote the performance of UE.
Summary of the invention
For problem of the prior art, the present invention provides a kind of methods that base station IAB assists UE to carry out cell selection.
The present invention provides a kind of method for avoiding the base station IAB cross jamming, and the base station IAB passes through the father in network topology
Node and/or child node determine cross jamming cell, then determine which UE serviced can be produced with the UE of cross jamming cell
Raw cross jamming is denoted as interference user UEi, and it is indicated to cross jamming cell;Which serviced be cross jamming cell determine
The interference user UE that UE can be serviced with the base station IABiCross jamming is generated, interfered cell interference user UE is denoted asii;It is dry according to gained
Disturb user UEiUser UE is interfered with interfered cellii, the base station IAB and cross jamming cell coordination UEiAnd UEiiSending and receiving data is made
Resource.
Moreover, the base station IAB determines which UE serviced can generate cross jamming, realization side with the UE of cross jamming cell
Formula is to execute following steps respectively to each cross jamming cell,
The user UE at all edges is selected in the base station IAB from the user UE serviced, is denoted as edge customer UEe,
The base station IAB configures each edge customer UEeReference Signal Received Power and the service of cross jamming cell are reported respectively
The Reference Signal Received Power of cell, is denoted as RSRP respectivelyiAnd RSRPs;
According to edge customer UEeRSRPiAnd RSRPsJudge whether that cross jamming can be generated with the UE of cross jamming cell.
Moreover, if some edge customer UEeRSRPiAnd RSRPsBetween difference absolute value be less than threshold delta, then
Confirm the UEeCross jamming can be generated with the UE of cross jamming cell, be denoted as interference user UEi;The threshold delta is by the base station IAB
Configuration.
Moreover, cross jamming cell determines which UE serviced can be with the interference user UE of the base station IABiIt generates to intersect and do
It disturbs, implementation is to execute following steps respectively by each cross jamming cell,
All edge UE are selected in the selection of cross jamming cell from serviced UE, are denoted as interfered cell edge customer UEei;
Cross jamming cell configures UEeiThe reference of the Reference Signal Received Power and serving cell of the base station IAB is reported respectively
Signal reception power is denoted as RSRP respectivelyiiAnd RSRPsi;
According to interfered cell edge customer UEeiRSRPiiAnd RSRPsiJudging whether can be with the UE of the base station IABiGenerate friendship
Fork interference.
Moreover, if some interfered cell edge customer UEeiRSRPiiAnd RSRPsiBetween the absolute value of difference be less than
Threshold deltai, then confirm the UEeiIt can be with the UE of the base station IABiCross jamming is generated, interfered cell interference user UE is denoted asii, described
Threshold deltaiIt is configured by interfered cell.
Moreover, the base station IAB indicates respectively interference user UE to each cross jamming celliIt can be produced with the UE of cross jamming cell
Raw cross jamming, instruction pass through physical layer signaling, multimedia access control layer signaling, radio resource control signaling, F1 interface letter
It enables or system broadcast message is realized.
Moreover, interfering user UE according to gainediUser UE is interfered with interfered cellii, coordinate the base station IAB and cross jamming be small
Resource used in the UE sending and receiving data in area, implementation is as follows,
If the base station IAB is the father node of certain cross jamming cell, when certain UE is dispatched in the base station IABiWhen carrying out transmission data,
The base station IAB notifies the cross jamming cell, and content of announcement is the UEiUsed resource;When cross jamming cell is notified
When, cross jamming cell is dispatching any UEiiCarry out the resource that notice is avoided when data transmit-receive;
If the base station IAB is the child node of certain cross jamming cell, as cross jamming cell scheduling UEiiIt is sent
When data, cross jamming cell notifies the base station IAB, and content of announcement is the cross jamming cell scheduling UEiiUsed resource;When
When the base station IAB is notified, any UE is being dispatched in the base station IABiCarry out the resource that notice is avoided when data transmit-receive.
Moreover, advice method uses semi-static mode and/or dynamic mode.
Moreover, semi-static mode is that system message or RRC signaling notify.
Moreover, dynamical fashion is that DCI or UCI is notified.
Moreover, UEiOr UEiiUsed resource is frequency resource and/or time-domain resource.
Moreover, time-domain resource is time interval resource and/or sign resources.
Technical solution of the present invention proposes that under the scene of the base station IAB, the transmission data of the serviced UE of father node can be to child node
The reception data of serviced UE generate cross jamming, the transmission data of sub- the serviced UE of section can UE serviced to father node reception
Data generate cross jamming, so cross jamming cell each other between the base station IAB and its father node and child node.Therefore, the party
Case is by coordinating resource used in the UE sending and receiving data of the base station IAB and cross jamming cell, to solve UE in the scene of the base station IAB
Uplink and downlink cross jamming the problem of, to promote the performance of UE, improve user experience.
Detailed description of the invention
Fig. 1 is the IAB base station applies schematic diagram of the embodiment of the present invention.
Fig. 2 is the base station the IAB half-duplex schematic diagram of the embodiment of the present invention.
Fig. 3 is the UE cross jamming schematic diagram of the base station the IAB scene of the embodiment of the present invention.
Fig. 4 is the flow chart of the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to fig. 4, a kind of method avoiding the base station IAB cross jamming proposed by the present invention, the base station IAB passes through network topology
Father node and/or child node in relationship, determine cross jamming cell, then determine which the UE meeting serviced and cross jamming
The UE of cell generates cross jamming, is denoted as interference user UEi, and it is indicated to cross jamming cell;Cross jamming cell determines institute
The interference user UE which UE of service can be serviced with the base station IABiCross jamming is generated, interfered cell interference user UE is denoted asii;
User UE is interfered according to gainediUser UE is interfered with interfered cellii, the base station IAB and cross jamming cell coordination UEiAnd UEiiIt receives
Send out resource used in data.
Embodiment one proposes the realization for the method for assisting UE to carry out cell selection from the angle of any base station IAB such as
Under:
The base station 1.IAB determines cross jamming cell, the i.e. father node of the base station IAB and child node institute by network topology
Service UE transmissions data can UE serviced to the base station IAB reception data generation cross jamming, so determination the base station IAB father
Node and child node are the cross jamming cell of the base station IAB, such as the father node of the base station IAB I is the base station IAB F, and child node is
The base station the IAB base station S, IAB F, S are the cross jamming cells of the base station IAB I;If the base station IAB does not have child node, only IAB base
The father node stood is the cross jamming cell of the base station IAB;If the base station IAB does not have father node (base station IAB donor), only
The child node of the base station IAB is the cross jamming cell of the base station IAB.
The base station 2.IAB determine which UE for being serviced can intersecting interfered cell UE generation cross jamming;Including
Following steps are executed respectively to each cross jamming cell,
The user UE at all edges is selected in the base station 2.1IAB from the user UE serviced, is denoted as edge customer UEe, may
There is one or more edge UE;When it is implemented, all UE that can configure its service by the base station IAB report serving cell
RSRP is compared by the sequence to RSRP, determines edge customer.
The base station 2.2IAB configures each edge customer UEeThe Reference Signal Received Power of cross jamming cell is reported respectively
(RSRP) and the Reference Signal Received Power of serving cell it, is denoted as RSRP respectivelyiAnd RSRPs;
If 2.3 some edge customer UEeRSRPiAnd RSRPsBetween difference absolute value be less than threshold delta, then really
Recognize the UEeCross jamming can be generated with the UE of cross jamming cell, be denoted as interference user UEi, may have one or more that can produce
The UE of raw cross jamming.
When it is implemented, above-mentioned threshold delta is pre-configured with by the base station IAB.
The base station 3.IAB indicates respectively interference user UE to each cross jamming celliIt can be generated with the UE of cross jamming cell
Cross jamming.
The instruction can be believed by physical layer (PHY), multimedia access control layer (MAC), wireless heterogeneous networks (RRC)
It enables, F1 interface signaling or system broadcast message are realized.
4. cross jamming cell determines which UE serviced can be with the interference user UE of the above-mentioned base station IABiGenerate intersection
Interference;Including executing following steps respectively by each cross jamming cell,
All edge UE are selected in the selection of 4.1 cross jamming cells from serviced UE, are denoted as interfered cell edge customer
UEei, may there is one or more edge UE;When it is implemented, the sequence that again may be by RSRP relatively determines edge
UE is reported the Reference Signal Received Power RSRP of serving cell by all UE that cross jamming cell configures its service, by right
The sequence of RSRP is compared, and determines edge customer;
4.2 cross jamming cells configure UEeiReference Signal Received Power (RSRP) kimonos of the above-mentioned base station IAB is reported respectively
The Reference Signal Received Power for cell of being engaged in, is denoted as RSRP respectivelyiiAnd RSRPsi;
If 4.3 RSRPiiAnd RSRPsiBetween difference absolute value be less than threshold deltai, then confirm the UEeiCan with it is above-mentioned
The UE of the base station IABiCross jamming is generated, interfered cell interference user UE is denoted asii, may have one or more interfered cell dry
Disturb user.
When it is implemented, above-mentioned threshold deltaiIt is pre-configured with by cross jamming cell.
If 5. the base station IAB be certain cross jamming cell father node (i.e. the cross jamming cell be the base station IAB son section
Point), when certain UE obtained by above-mentioned steps 2 is dispatched in the base station IABiWhen carrying out transmission data, the base station IAB notifies the cross jamming cell,
Content of announcement is the UEiUsed resource;If the base station IAB is child node (i.e. cross jamming of certain cross jamming cell
Cell is the father node of the base station IAB), as 4 gained certain UE of the cross jamming cell scheduling above-mentioned stepsiiWhen carrying out transmission data,
Cross jamming cell then notifies the base station IAB, and content of announcement is the cross jamming cell scheduling UEiiUsed resource;
Semi-static mode and/or dynamic mode can be used in 5.1 above-mentioned advice methods;The semi-static mode can be with
It is notified for system message or RRC signaling;Dynamical fashion can notify for DCI or UCI;The semi-static mode combined with dynamic can
Think and configured in a manner of semi-static, the configuration is then activated by dynamical fashion.
5.2 above-mentioned UEiOr UEiiUsed resource is frequency resource and/or time-domain resource;
5.3 above-mentioned time-domain resources are time slot level resources and/or symbol level resources.
If 6. the base station IAB be certain cross jamming cell father node (i.e. the cross jamming cell be the base station IAB son section
Point), when cross jamming cell receives above-mentioned notice (scheduling UEiUsed resource) when, cross jamming cell is any in scheduling
UEiiCarry out resource (the scheduling UE that the above-mentioned base station IAB notice is avoided when data receiveriUsed resource);If the base station IAB is
The child node (i.e. the cross jamming cell be the base station IAB father node) of certain cross jamming cell, when the base station IAB receive it is above-mentioned logical
Know (scheduling UEiiUsed resource) when, any UE is being dispatched in the base station IABiIt is small that the cross jamming is avoided when progress data transmission
Resource (the scheduling UE of area's noticeiiUsed resource).
When it is implemented, the automatic running that software mode realizes above scheme can be used in those skilled in the art.
Embodiment two is considered in the system for including multiple base stations IAB, if each base station IAB only focuses on the son of oneself
On node, assistance can be realized more efficiently in whole system, propose the side that any base station IAB assists UE to carry out cell selection
Method is accomplished by
The base station 1.IAB determines whether there is child node by network topology, is, the child node of the determining base station IAB is
The cross jamming cell of the base station IAB.
The base station 2.IAB determine which UE for being serviced can intersecting interfered cell UE generation cross jamming;Specifically
When implementation, the base station IAB can have multiple child nodes, therefore this step includes executing following step respectively to each cross jamming cell
Suddenly,
The user UE at all edges is selected in the base station 2.1IAB from the user UE serviced, is denoted as edge customer UEe, may
There is one or more edge UE;When it is implemented, all UE that can configure its service by the base station IAB report serving cell
RSRP is compared by the sequence to RSRP, determines edge customer.
The base station 2.2IAB configures each edge customer UEeThe Reference Signal Received Power of cross jamming cell is reported respectively
(RSRP) and the Reference Signal Received Power of serving cell it, is denoted as RSRP respectivelyiAnd RSRPs;
If 2.3 some edge customer UEeRSRPiAnd RSRPsBetween difference absolute value be less than threshold delta, then really
Recognize the UEeCross jamming can be generated with the UE of cross jamming cell, be denoted as interference user UEi, may have one or more that can produce
The UE of raw cross jamming.
When it is implemented, above-mentioned threshold delta is pre-configured with by the base station IAB.
The base station 3.IAB indicates respectively interference user UE to each cross jamming celliIt can be generated with the UE of cross jamming cell
Cross jamming;
The instruction can be believed by physical layer (PHY), multimedia access control layer (MAC), wireless heterogeneous networks (RRC)
It enables, F1 interface signaling or system broadcast message are realized.
4. cross jamming cell determines which UE serviced can be with the interference user UE of the above-mentioned base station IABiGenerate intersection
Interference;Including executing following steps respectively by each cross jamming cell,
All edge UE are selected in the selection of 4.1 cross jamming cells from serviced UE, are denoted as interfered cell edge customer
UEei, may there is one or more edge UE;
4.2 cross jamming cells configure UEeiReference Signal Received Power (RSRP) kimonos of the above-mentioned base station IAB is reported respectively
The Reference Signal Received Power for cell of being engaged in, is denoted as RSRP respectivelyiiAnd RSRPsi;
If 4.3 RSRPiiAnd RSRPsiBetween difference absolute value be less than threshold deltai, then confirm the UEeiCan with it is above-mentioned
The UE of the base station IABiCross jamming is generated, interfered cell interference user UE is denoted asii, may have one or more interfered cell dry
Disturb user;
When it is implemented, above-mentioned threshold deltaiIt is pre-configured with by cross jamming cell.
5. because of the father node that the base station IAB at this time is cross jamming cell, (i.e. cross jamming cell is that the son of the base station IAB saves
Point), when 2 gained UE of above-mentioned steps is dispatched in the base station IABiWhen carrying out transmission data, the base station IAB notifies cross jamming cell, notice
Content is the UEiUsed resource;
Semi-static mode and/or dynamic mode can be used in 5.1 above-mentioned advice methods;The semi-static mode can be with
It is notified for system message or RRC signaling;Dynamical fashion can notify for DCI or UCI;The semi-static mode combined with dynamic can
Think and configured in a manner of semi-static, the configuration is then activated by dynamical fashion.
5.2 above-mentioned UEiUsed resource is frequency resource and/or time-domain resource;
5.3 above-mentioned time-domain resources are time slot level resources and/or symbol level resources.
6. because of the father node that the base station IAB at this time is cross jamming cell, (i.e. cross jamming cell is that the son of the base station IAB saves
Point), when cross jamming cell receives above-mentioned notice (scheduling UEiUsed resource) when, cross jamming cell is any in scheduling
UEiiCarry out resource (the scheduling UE that the above-mentioned base station IAB notice is avoided when data receiveriUsed resource).
When it is implemented, the automatic running that software mode realizes above scheme can be used in those skilled in the art.
The foregoing is merely several embodiments of the invention, are not intended to restrict the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements, should all be included in the protection scope of the present invention within principle.