JP7447334B1 - Bandwidth portion management method for networks and controllers therefor - Google Patents

Abstract

A method of bandwidth portion (BWP) management for a network and a controller therefor. The method determines whether interference exists between the plurality of user equipments based on location information of the plurality of user equipments and location information of the plurality of base stations to obtain the interference status of the plurality of user equipments. It is determined whether or not to do so. Interference exists between user equipment(s) of any two base stations in each of the at least one base station combination. There is interference between the first user equipment and the second user equipment in the first base station combination. The method further includes performing BWP resource allocation based on the at least one base station combination and interference status of the plurality of user equipments to obtain a BWP resource allocation result. The first user equipment is assigned a first BWP frequency band and the second user equipment is assigned a second BWP frequency band. [Selection diagram] Figure 1

Description

The present disclosure generally relates to a method of bandwidth part (BWP) management and a controller therefor. The present disclosure more particularly relates to a method of BWP management for a network and a controller therefor.

Due to the diversity and variability of applications, private 5G networks need to meet dynamic service-level agreements (SLA) assurances. For example, mobile user equipment needs to have a stable quality of experience (QoE), different user equipment may have different QoE requirements, and the QoE requirements of user equipment change dynamically. obtain. Slicing technology is often used to meet the requirements of 5G SLA guarantees. Slicing techniques include network slicing, software defined network (SDN), and resource block (RB) scheduling techniques.

Core network resources can be sliced through network slicing techniques. Transmission network resources can be sliced through SDN technology. Resources of a radio access network (RAN) can be sliced through resource block (RB) scheduling. The minimum unit of transmission resources of a base station is an RB. RB scheduling is performed by allocating different amounts of time slots of RBs to different users with different QoE requirements.

However, in networks with multiple base stations, the RAN only considers RB allocation and does not consider how to increase the modulation and code rate. Poor signal quality of transmission produces low modulation and code rates, resulting in low throughput of signal transmission. Therefore, how to improve the modulation and code rate to increase the throughput of signal transmission has become an important challenge for the industry.

For example, US Pat. No. 11,202,234 B1 discloses a system for monitoring power and traffic loads at multiple cell sites in a network. Systems and methods are provided for adaptive bandwidth (BW) management that configures an element management control unit including a set of units (DU/CU); BWPs for users at multiple cell sites by moving users to a smaller set of multiple bandwidth portions (BWPs) at the cell site in response to a set of AC power outages and traffic load reduction conditions. The BW management unit is in communication with the BW management unit coupled to the element management system so as to adapt the BW management unit to the component management system. It also determines whether a specified , directs user traffic to move to a lower BWP, while other BWPs at the cell site are shut down to conserve power at the operational cell site.

The present disclosure relates to a method of bandwidth portion (BWP) management for a network performed by a controller. The method includes the following steps. Location information for a plurality of user equipment is received. The network includes a plurality of base stations communicating with a plurality of the user equipments. The plurality of user equipment includes a first user equipment and a second user equipment. any two user equipments of the plurality of user equipments based on the location information of the plurality of user equipments and the location information of the plurality of base stations to obtain the interference status of the plurality of user equipments; It is determined whether there is interference between. At least one base station combination is generated. Interference exists between user equipment(s) of any two base stations in each of the at least one said base station combination. The at least one base station combination includes a first base station combination. The first base station combination includes a first base station and a second base station. The first base station communicates with the first user equipment and the second base station communicates with the second user equipment. There is interference between the first user equipment and the second user equipment. BWP resource allocation is performed based on the at least one base station combination and the interference status of the plurality of user equipments to obtain a BWP resource allocation result. In the BWP resource allocation result, the first user equipment is assigned a first BWP frequency band, and the second user equipment is assigned a second BWP frequency band. The first BWP frequency band is different from the second BWP frequency band.

According to one embodiment, a controller is provided for performing BWP management for a network. The controller includes an information interface and a processor. The information interface is configured to receive location information of a plurality of user equipment. The network includes a plurality of base stations that communicate with a plurality of the user equipments. The plurality of user equipment includes a first user equipment and a second user equipment. The processor is configured to perform the following steps. any two user equipments of the plurality of user equipments based on the location information of the plurality of user equipments and the location information of the plurality of base stations to obtain the interference status of the plurality of user equipments; It is determined whether there is interference between. At least one base station combination is generated. Interference exists between user equipment(s) of any two base stations in each of the at least one said base station combination. The at least one base station combination includes a first base station combination. The first base station combination includes a first base station and a second base station. The first base station communicates with the first user equipment and the second base station communicates with the second user equipment. There is interference between the first user equipment and the second user equipment. BWP resource allocation is performed based on the at least one base station combination and the interference status of the plurality of user equipments to obtain a BWP resource allocation result. In the BWP resource allocation result, the first user equipment is assigned a first BWP frequency band, and the second user equipment is assigned a second BWP frequency band. The first BWP frequency band is different from the second BWP frequency band.

2 shows a flowchart for a method of bandwidth portion (BWP) management for a network, according to an embodiment of the present disclosure. 1 shows a block diagram for a network. 1 illustrates a block diagram of an example controller, according to an embodiment of the present disclosure. FIG. 5 shows a flowchart for a method of BWP management for a network, according to another embodiment of the present disclosure. 5 shows an example of a private network for the method in FIG. 4; An example of the content of a request sent from a base station to an intelligent controller is shown. An example of the content of a request that an intelligent controller sends to a base station to establish a subscription is shown. An example of enriched information data and an example of user equipment connection information are shown. An example regarding BWP resource allocation results will be shown. An example of the content of a control message transmitted to a base station by an intelligent controller to control the base station is shown. 4 illustrates an example of a method for a base station to communicate with user equipment. 4 illustrates an example of a method for a base station to communicate with user equipment. 4 illustrates a procedure for performing BWP resource allocation for a network according to enrichment information data to obtain a BWP resource allocation result in step 410, according to an embodiment of the present disclosure. 12 shows detailed steps for establishing a relationship graph for a network with multiple base stations and multiple user equipments in step 1202; 12 shows detailed steps for establishing a relationship graph for a network with multiple base stations and multiple user equipments in step 1202; An example of a network is shown. An intermediate relationship graph for the network is shown. An intermediate relationship graph for the network is shown. An intermediate relationship graph for the network is shown. Shows the final relationship graph for the network. Figure 3 shows the relationship between distance Ds and distance ds for downlink communications. Figure 3 shows the relationship between distance Ds' and distance ds' for uplink communications. 14E shows the relationship graph of FIG. 14E and the corresponding complete graph. Figure 3 shows another example relationship graph and the corresponding complete graph. 12 shows a detailed process for obtaining BWP resource allocation results step 1206 in FIG. 12. 2 shows the amount of interfering user equipment and the amount of non-interfering user equipment, as well as the allocation of available BWP bandwidth to BWP frequency bands to interfering user equipment; 2 shows the amount of interfering user equipment and the amount of non-interfering user equipment, as well as the allocation of available BWP bandwidth to BWP frequency bands to interfering user equipment; 2 shows the amount of interfering user equipment and the amount of non-interfering user equipment, as well as the allocation of available BWP bandwidth to BWP frequency bands to interfering user equipment; 2 shows the amount of interfering user equipment and the amount of non-interfering user equipment, as well as the allocation of available BWP bandwidth to BWP frequency bands to interfering user equipment; The allocation result table is shown by taking the complete graph {N_A, N_C, N_D} as the operation start graph. 1 illustrates an example application for a method of BWP management for a network, according to an embodiment of the present application, and illustrates an unmanned aerial vehicle (UAV) racing field. 1 illustrates an example application of a method of BWP management for a network, according to an embodiment of the present application, and shows a block diagram for a network of UAV racing fields; FIG. 20B shows an example of a sequence diagram for the network of UAV racing fields of FIGS. 20A and 20B. FIG.

In the following detailed description, numerous specific details are set forth for illustrative purposes in order to provide a thorough understanding of the disclosed embodiments. However, it may be apparent that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown schematically in order to simplify the drawings.

Please refer to FIGS. 1 and 2. FIG. 1 shows a flowchart for a method of bandwidth portion (BWP) management for a network, and FIG. 2 shows a block diagram for the network, according to an embodiment of the present disclosure. The method of BWP management is performed by a controller (eg, intelligent controller 202). A method of BWP management for a network includes the following steps. First, in step 102, location information for a plurality of user equipment is received. A network (eg, private network 204) includes multiple base stations that communicate with multiple user equipment. The plurality of user equipment includes a first user equipment and a second user equipment. For example, the first user equipment is user equipment 206 and the second user equipment is user equipment 208.

Thereafter, in step 104, any one of the plurality of user equipments is determined based on the location information of the plurality of user equipments and the location information of the plurality of base stations to obtain the interference status of the plurality of user equipments. It is determined whether interference exists between the two user equipments. Next, at step 106, at least one base station combination is generated. Interference exists between user equipment(s) of any two base stations in each of the at least one such base station combination. The at least one base station combination includes a first base station combination. The first base station combination includes a first base station and a second base station. For example, the first base station is base station 210 and the second base station is base station 212. A first base station communicates with a first user equipment. A second base station communicates with a second user equipment. Interference exists between the first user equipment and the second user equipment.

Next, in step 108, a BWP resource allocation is performed based on the interference status of the at least one base station combination and the plurality of user equipments to obtain a BWP resource allocation result. executed. In the BWP resource allocation result, the first user equipment is assigned a first BWP frequency band and the second user equipment is assigned a second BWP frequency band. The first BWP frequency band is different from the second BWP frequency band.

See FIG. 3. FIG. 3 illustrates a block diagram of an example controller, according to an embodiment of the present disclosure. The controller includes an information interface 302 and a processor 304. Information interface 302 is configured to perform step 102 in FIG. 1 to receive location information for a plurality of user equipment. Processor 304 is configured to perform steps 104-108 in FIG. The controller may further include a storage device 306 for storing location information of a plurality of user equipment.

For downlink communication, the distance between the second user equipment and the first base station minus the distance between the first user equipment and the first base station is less than the first interference radius. When , it is determined that interference exists between the first user equipment and the second user equipment.

For uplink communication, the distance between the first user equipment and the second base station minus the distance between the first user equipment and the first base station is less than the second interference radius. When , it is determined that interference exists between the first user equipment and the second user equipment.

In one example, the unit bandwidth of the first BWP frequency band is obtained by dividing the available BWP bandwidth by an integer P. P is the amount of user equipment of a particular base station in the first base station combination, where the particular base station has the maximum amount of user equipment in the first base station combination.

Alternatively, the unit bandwidth of the first BWP frequency band is obtained by dividing the available BWP bandwidth by an integer Q. Q is the amount of user equipments in the first base station combination that interfere with each other.

In another example, the unit bandwidth of the first BWP frequency band is obtained by dividing the available BWP bandwidth by an integer N. N is the maximum number selected from integer P and integer Q. P is the amount of user equipment of a particular base station in the first base station combination, the particular base station has the maximum amount of user equipment in the first base station combination, and Q is the amount of user equipment of the first base station The amount of user equipment in a combination that interferes with each other.

In one example, the method of BWP management for a network further includes the following steps. First, a relation graph for the network is established. The relational graph includes multiple nodes and multiple connection lines. The plurality of nodes include a first node and a second node. The plurality of connection lines includes a first connection line. The first node represents a first base station and the second node represents a second base station. The first connection connects the first node and the second node.

The relational graph includes at least one complete graph corresponding to at least one base station combination. The at least one complete graph includes a first complete graph corresponding to a first base station combination. Multiple user equipments interfering with each other in multiple base stations of the first complete graph are assigned different BWP frequency bands in the BWP resource allocation result.

In one example, the first base station combination further includes a third base station and the plurality of user equipment further includes a third user equipment. A third user equipment communicates with a third base station. A third user equipment is assigned a third BWP frequency band. The third BWP frequency band is different from the first BWP frequency band, and the third BWP frequency band is different from the second BWP frequency band.

In one example, the at least one base station combination further includes a second base station combination. The second base station combination includes a first base station and a fourth base station. The plurality of user equipment further includes a fourth user equipment. A fourth user equipment communicates with a fourth base station. A fourth user equipment is assigned a fourth BWP frequency band. The fourth BWP frequency band is different from the first BWP frequency band, and the fourth BWP frequency band overlaps ((partially) overlaps) the second BWP frequency band.

In one example, the method of BWP management for a network further includes the following steps. A determination is made whether throughputs for the user equipment meet predetermined requirements in a service level agreement. A first BWP switching command is transmitted through the first base station to the first user equipment, and a second BWP switching command is transmitted through the second base station to the second user equipment. The first BWP switching command indicates that the first user equipment is assigned a first BWP frequency band, and the second BWP switching command indicates that the second user equipment is assigned a second BWP frequency band.

Please refer to FIGS. 4 and 5. FIG. 4 shows a flowchart for a method of BWP management for a network, according to another embodiment of the present disclosure, and FIG. 5 shows an example of a private network for the method in FIG. 4. First, in step 402, multiple base stations are connected to an intelligent controller. For example, base station BS1 and base station BS2 are connected to intelligent controller 502. FIG. 6 shows an example of the contents of a request sent from a base station to an intelligent controller. As shown in FIG. 6, base station BS1 transmits request ID (Request ID) 1 to intelligent controller 502, and base station BS2 transmits request ID2 to intelligent controller 502. For example, by issuing a request ID1, the base station BS1 requests the intelligent controller for the node ID "gNB1" of the base station BS1 and the radio access network (RAN) function supported by the base station BS1. 502. For example, base station BS1 supports RAN functions of BWP, monitoring, and traffic steering.

Thereafter, in step 404, a subscription to the base station is established by the intelligent controller. FIG. 7 shows an example of the content of a request that an intelligent controller sends to a base station to establish a subscription. As shown in FIG. 7, the intelligent controller 502 sends a request ID1 to the base station BS1. For example, the intelligent controller 502 may determine that the RAN function "BWP" is subscripted and that the subscripted action for the RAN function "BWP" re-allocates BWP resources at the base stations. ) and allocating BWP resources to the user equipments for the current communication.

At step 406, multiple user equipments are connected to multiple base stations. For example, as shown in FIG. 5, user equipment UE1 and user equipment UE2 are connected to a base station BS2, and user equipment UE3 and user equipment UE4 are connected to a base station BS1. Next, at step 408, enrichment information (EI) data is periodically received by the intelligent controller 502, for example from an EI server (not shown in FIG. 5). For example, the enriched information data includes location information of multiple user equipments and location information of multiple base stations. FIG. 8 shows an example of enriched information data and an example of user equipment connection information. As shown in FIG. 8, the location information of the plurality of user devices may include a time stamp and coordinate values X and Y of each user device. The location information of the plurality of base stations may include coordinate values X and Y of each base station. The user equipment connection information includes a user equipment ID and a node ID of a plurality of base stations to which each of the plurality of user equipments is connected. Alternatively, the location information of the plurality of user equipments may be Global Positioning System (GPS) location information provided by the plurality of user equipments.

At step 410, BWP resource allocation for the network is performed by the intelligent controller 502 according to the enriched information data to obtain a BWP resource allocation result. FIG. 9 shows an example of BWP resource allocation results. As shown in FIG. 9, in the BWP resource allocation results, for example, user equipment UE1 and user equipment UE2 are allocated the first BWP frequency band, user equipment UE3 and user equipment UE4 are allocated the second BWP frequency band, The 1BWP frequency band is different from the 2nd BWP frequency band. For example, the BWP frequency band of BWP ID1 has a bandwidth of 50 (frequency units) starting from 0 (frequency units), and the BWP frequency band of BWP ID2 has a bandwidth of 50 (frequency units) starting from 50 (frequency units). ) bandwidth. User equipment UE1 and user equipment UE2 are assigned BWP ID1, user equipment UE3 and user equipment UE4 are assigned BWP ID2. That is, user equipment UE1 and user equipment UE2 are assigned a BWP frequency band from 0 to 50 (in frequency units), and user equipment UE3 and user equipment UE4 are assigned a BWP frequency band from 50 to 100 (in frequency units).

At step 412, the BWP resource allocation results are communicated by the intelligent controller 502 to the multiple base stations via multiple control messages. FIG. 10 shows an example of the contents of a control message that an intelligent controller transmits to a base station to control the base station. As shown in FIG. 10, the intelligent controller 502 sends a control message (request ID 1) for the base station BS2 to the base station BS2, and the intelligent controller 502 sends a control message (request ID 2) for the base station BS1 to the base station BS2. Send a call to BS1. For example, the intelligent controller 502 may determine that the RAN function "BWP" is subscripted and that the subscripted actions for the RAN function "BWP" are to redistribute BWP resources at base stations and to and allocating multiple BWP resources to multiple user equipments for the purpose of determining the base station BS2. A sub-action for the action of redistributing BWP resources in base stations includes definitions for BWP ID1 and BWP ID2, as shown in FIG. A sub-action to the action of allocating BWP resources to user equipment for current communication includes assigning BWP ID1 to user equipment UE1 and user equipment UE2.

In the control message (request ID2) to the base station BS1, the sub-action for the action of allocating BWP resources to the user equipments for current communication is to allocate BWP ID2 to the user equipment UE3 and user equipment UE4. This differs from the control message (request ID1) for base station BS2 in that it includes:

At step 414, BWP allocation messages are transmitted by the plurality of base stations to the plurality of user equipments according to the BWP resource allocation results. For example, the base station BS2 uses the BWP frequency band defined by the BWP ID1 (BWP frequency band 0 to 50 (frequency unit)) to establish a plurality of base stations in which the base station BS2 communicates with the user equipment UE1 and the user equipment UE2. The base station BS1 transmits a BWP allocation message for the user equipment UE3 and the user equipment by using the BWP frequency band (BWP frequency band 50 to 100 (frequency unit)) defined by the BWP ID2. Send multiple BWP allocation messages to communicate with UE4. 11A and 11B illustrate an example of how a base station communicates with user equipment. As shown in FIGS. 11A and 11B, user equipment UE1 and user equipment UE2 communicate with base station BS2 in the BWP frequency band of frequencies 0 to 50, and user equipment UE3 and user equipment UE4 communicate with the base station BS2 in the BWP frequency band of frequencies 50 to 100. It communicates with the base station BS1 in the frequency band. Even if there may be interference between user equipment UE2 and user equipment UE3 when user equipment UE2 and user equipment UE3 use the same frequency band to communicate with the corresponding base station, user equipment UE2 and under the situation that the user equipment UE3 uses different frequency bands to communicate with the corresponding base station, there will be no interference.

Refer to FIG. 12. In step 410, a procedure is shown for performing BWP resource allocation for a network according to enriched information data to obtain a BWP resource allocation result, according to an embodiment of the present disclosure. First, in step 1202, a relationship graph for a network with multiple base stations and multiple user equipment is established. Thereafter, in step 1204, multiple base station combinations are generated. Next, in step 1206, BWP resource allocation results are obtained. Thereafter, in step 1208, a BWP resource allocation result that complies with the service level agreement (SLA) is found. Each step in FIG. 12 will be described in more detail below.

See FIGS. 13A and 13B. A detailed process for establishing a relationship graph for a network with multiple base stations and multiple user equipments is shown in step 1202. In step 1302, parameter i=1, parameter j=1, and parameter k=1 are set. i, j, and k are integers. Next, in step 1304, user equipment UE(i) is selected as an operation reference point from a user equipment list containing all user equipment in the network. Assume that user equipment list UEL={UE_1, UE_2, UE_3, UE_4, UE_5, UE_6, UE_7}. See FIG. 14A. FIG. 14A shows an example of a network. Assume that user equipment UE_1 is selected and that UE(i)=UE(1)=US_1. User equipment UE_1 is used as an operating reference point.

Thereafter, in step 1306, a neighbor list NL(i) of the base station BS(i) communicating with the user equipment UE_1 is obtained. For example, as shown in FIG. 14A, base station BS_D is communicating with user equipment UE_1, so base station BS(i) (=BS(1)) is base station BS_D. For example, the neighbor list NL(i) of base station BS_D is NL(1), NL(1)={BS_A, BS_B, BS_C, BS_E, BS_F, BS_G}, and base station BS_A, base station BS_B, It is assumed that station BS_C, base station BS_E, base station BS_F, and base station BS_G are base stations adjacent to base station BS_D.

Next, in step 1308, a base station BS(k) is selected from the neighbor list NL(i). Suppose base station BS_A is selected as BS(k). Thereafter, in step 1310, a user equipment UE(j) is selected from the plurality of user equipments communicating with the base station BS(k). Assume that user equipment UE_4 is selected as UE(j) because user equipment UE_3 and user equipment UE_4 are communicating with base station BS_A.

Then, in step 1312, it is determined whether the interference distance between user equipment UE(i) and user equipment UE(j) is less than an interference radius. For downlink communication, the distance ds between the user equipment UE (j) and the base station BS (k) is subtracted from the distance Ds between the user equipment UE (i) and the base station BS (k). When the distance between the user equipment UE(i) and the user equipment UE(j) is less than the first interference radius, the interference distance between the user equipment UE(i) and the user equipment UE(j) is less than the interference radius. Yes, it is determined that there is interference between user equipment UE(j) and user equipment UE(i).

For uplink communication, the distance ds' between the user equipment UE(j) and the base station BS(k) is subtracted from the distance Ds' between the user equipment UE(j) and the base station BS(i). The interference distance between user equipment UE(i) and user equipment UE(j) is less than the interference radius when the distance (i.e., Ds′−ds′, as shown in FIG. 15B) is less than the second interference radius. , it is determined that interference exists between user equipment UE(j) and user equipment UE(i). When there is interference between user equipment UE(j) and user equipment UE(i), the throughput is reduced. For example, as shown in FIG. 14A, in order to determine whether there is interference between user equipment UE_1 and user equipment UE_4, the interference distance between user equipment UE_1 and user equipment UE_4 is less than the interference radius. It is determined whether or not.

Step 1312 may be performed separately for downlink and uplink communications. That is, when multiple base stations are performing downlink communications with multiple user equipments, step 1312 is performed according to criteria for downlink communications. Also, when multiple user equipments are performing uplink communications with multiple base stations, step 1312 is performed according to criteria for uplink communications.

If the determination in step 1312 is Yes, the process moves to step 1314. If the determination in step 1312 is No, the process moves to step 1316. At step 1314, a relational graph for the network is established and connections are provided connecting the nodes for base station BS(i) and the nodes for base station BS(k) to identify users interfering with user equipment UE(i). Equipment UE(j) is recorded. For example, referring to FIG. 14B, an intermediate relationship graph for the network is shown. Since there is interference between user equipment UE(i) (UE_1) and user equipment UE(j) (UE_4), node N_A for base station BS(k) (BS_A) and base station BS(i)( Node N_D for BS_D) is connected by connection 1402. The user equipment UE_4 is then recorded as interfering with the user equipment UE_1.

In step 1316, it is determined whether there are other user equipments that communicate with the base station BS(k) and for which the interference determination of step 1312 has not been performed. If yes, proceed to step 1318; if no, proceed to step 1320. At step 1318, the value of parameter j is added by one. After step 1318, the process moves to step 1310, where user equipment UE(j) (j=2) is selected from the plurality of user equipments communicating with base station BS(k). For example, user equipment UE_3 is selected as user equipment UE(j) (j=2). Step 1312 is then performed to determine whether the interference distance between user equipment UE_1 and user equipment UE_3 is less than the interference radius. If the determination is No, the process moves to step 1316. If the determination in step 1316 is No, the process moves to step 1320.

In step 1320, it is determined whether there are other base stations in the neighbor list NL(i) for which the interference determination of step 1312 has not been performed for any user equipment with which to communicate. If yes, step 1322 is executed, adding 1 to parameter k and setting parameter j=1. If no, proceed to step 1324. After step 1322, the process moves to step 1308, where a base station BS(k) (k=2) is selected from the neighbor list NL(i). Suppose base station BS_C is selected as BS(k) (k=2). Then, in step 1310, user equipment UE(j) (j=1) is selected from the plurality of user equipments communicating with base station BS(k) (k=2). Assume that user equipment UE_5 is selected as UE(j) (j=1) because user equipment UE_5 and user equipment UE_6 are communicating with base station BS_C. Then, in step 1312, the interference distance between user equipment UE(i) (i=1) (i.e., US_1) and user equipment UE(j) (j=1) (i.e., US_5) is less than the interference radius. It is determined whether or not. If the determination is Yes, the process moves to step 1314. At step 1314, a relational graph for the network is established, connecting the node (node N_D) for base station BS(i) (BS_D) and the node (node N_C) for base station BS(k) (BS_C). (Connection 1404 in FIG. 14C) is established and user equipment UE(i) (UE_1) and interfering user equipment UE(j) (UE_5) are recorded.

Thereafter, moving to step 1316, it is determined whether there are other user equipments that communicate with the base station BS(k) (BS_C) and for which the interference determination of step 1312 has not been performed. A user equipment UE_6 is determined that is in communication with the base station (BS_C) and for which the interference determination of step 1312 has not been performed. Accordingly, steps 1318, 1310, 1312, and 1314 are performed with respect to user equipment UE_6. Steps 1316 and 1320 are then performed, and the neighbor list NL(i) (currently, the neighbor list NL(i) of the base station BS_D is NL(1), and NL(1)={BS_A, BS_B, BS_C, BS_E, BS_F, BS_G} (e.g., one of base station BS_B, base station BS_E, base station BS_F, and base station BS_G), and steps 1308 to 1320 are performed. executed. The above steps are performed recursively until all of the base stations in the neighbor list NL(i) are selected and the associated process is performed.

At step 1324, it is determined whether there is any user equipment in the user equipment list that has not been selected as an operating reference point. In this example where user equipment list UEL={UE_1, UE_2, UE_3, UE_4, UE_5, UE_6, UE_7}, only user equipment UE_1 is selected as the operating reference point, and user equipment UE_2 to user equipment UE_7 are selected as the operating reference point. Not selected as a point. Therefore, the determination in step 1324 is Yes, and the process moves to step 1326. At step 1326, the parameter i is added by one. Next, moving to step 1304, the user equipment UE ( i) (=UE(2)) is selected as the operating reference point. Assume that user equipment UE_2 is selected as the operating reference point and steps 1306 to 1322 are performed.

Assume that after all of the user equipments in the user equipment list are selected as operational reference points and steps 1306-1322 are performed, the resulting relationship graph is the relationship graph 1406 shown in FIG. 14D. User equipment UE_1 interferes with user equipment UE_4, user equipment UE_4 interferes with user equipment UE_5, user equipment UE_1 interferes with user equipment UE_6, user equipment UE_1 interferes with user equipment UE_2, user equipment UE_2 interferes with user equipment Suppose that a result is shown to interfere with UE_4. Accordingly, the corresponding relationship graph 1406 in FIG. 14D includes node N_A connected to node N_B by connection 1408, node N_A connected to node N_C by connection 1410, node N_B connected to node N_D by connection 1412, and node N_A is shown connected to node N_D by connection 1402 and node N_C is shown connected to node N_D by connection 1404.

If the determination in step 1324 is No, the process moves to step 1328. At step 1328, a base station is selected whose user equipment(s) do not interfere with user equipment of any other base stations in the network. A node for the selected base station is given in the relationship graph. For example, assuming that the user equipment UE_7 does not interfere with any of the user equipments UE_1 to UE_6 of other base stations in the network, the base station BS_G corresponding to the user equipment UE_7 is selected. Then, as shown in FIG. 14E, a node N_G for base station BS_G is added in the relationship graph. Since user equipment UE_7 of base station BS_G does not interfere with any other user equipment in the network (i.e. user equipment UE_1 to user equipment UE_6), node N_G for base station BS_G is isolated and node N_G does not interact with other user equipments. is not connected to any node.

The step 1204 of generating multiple base station combinations in FIG. 12 is described in more detail in FIGS. 16A and 16B. 16A shows the relationship graph of FIG. 14E and a corresponding complete graph, and FIG. 16B shows another example relationship graph and a corresponding complete graph. For each base station combination, the existence of interference between the user equipment(s) of any two base stations in each base station combination corresponds to a complete graph. In a complete graph, every node is connected to every (one or more) other nodes by (one or more) connections. For example, the relational graph in FIG. 16A includes complete graphs {N_A, N_C, N_D}, {N_A, N_B, N_D}, {N_G}, and the relational graph in FIG. 16B includes complete graphs {N_A}, {N_C, N_D }, {N_B, N_D, N_E}.

In FIG. 17, the step 1206 of obtaining BWP resource allocation results in FIG. 12 is explained in more detail. In step 1702, the parameter p=1 and the parameter q=1 are set. p and q are integers. In step 1704, the complete graph CG(p) is taken as the operation starting graph. For example, the complete graph CG(p)={N_A, N_C, N_D}. Next, in step 1706, a unit bandwidth is calculated. Unit bandwidth is calculated by dividing the available BWP bandwidth by an integer N. N is the maximum number selected from integer P and integer Q. P is the amount of user equipment of a particular base station in the base station combination according to the complete graph CG(p). A particular base station has the largest amount of user equipment in the base station combination according to the complete graph CG(p). Q is the amount of mutually interfering user equipments in the base station combination according to the complete graph CG(p).

For example, as shown in FIG. 14A, in the complete graph CG(p)={N_A, N_C, N_D}, the amount of user equipment of base station BS_A is 2 (user equipment UE_3 and user equipment UE_4), and the amount of user equipment of base station BS_A is 2 (user equipment UE_3 and user equipment UE_4), The amount of user equipment of BS_C is 2 (user equipment UE_5 and user equipment UE_6) and the amount of user equipment of base station BS_D is 1 (user equipment UE_1). Therefore, the value of P is 2, which is the maximum value among 2, 2, and 1.

As mentioned above, since user equipment UE_1 interferes with user equipment UE_4, user equipment UE_4 interferes with user equipment UE_5, and user equipment UE_1 interferes with user equipment UE_6, the base station combination according to the complete graph CG(p) The amount of user equipments interfering with each other in is 4 (corresponding to UE_1, UE_4, UE_5, UE_6). Therefore, the value of Q is 4. Since N is the maximum number selected from P (=2) and Q (=4), the value of N is equal to Q, ie 4. The unit bandwidth is calculated by dividing the available BWP bandwidth by N (=4). That is, the unit bandwidth is 1/4 of the available BWP bandwidth.

At step 1708, the available BWP bandwidth is allocated according to the amount of user equipment at each base station in the complete graph CG(p). See FIGS. 18A-18D. First, the amount of interfering and non-interfering user equipment is calculated, and then the BWP frequency bands of the available BWP bandwidth are allocated to the interfering user equipment.

For example, multiple mutually interfering user equipments in a base station combination according to the complete graph CG(p) are grouped. That is, user equipment UE_1, user equipment UE_4, user equipment UE_5, and user equipment UE_6 are grouped. Each of user equipment UE_1, user equipment UE_4, user equipment UE_5, and user equipment UE_6 is allocated one unit bandwidth, ie, 1/4 of the available BWP bandwidth. For example, user equipment UE_1 is assigned a BWP frequency band FB_3, user equipment UE_4 is assigned a BWP frequency band FB_4, and BWP frequency band FB_3 is different from BWP frequency band FB_4. Since user equipment UE_1 and user equipment UE_4 communicate with base station BS_D and base station BS_A in different BWP frequency bands FB_3 and FB_4, respectively, no interference occurs between user equipment UE_1 and user equipment UE_4.

Since user equipment UE_5 and user equipment UE_6 communicate with the same base station BS_C with mutually orthogonal signals, user equipment UE_5 and user equipment UE_6 may share the same BWP frequency band. Accordingly, user equipment UE_5 is assigned BWP frequency band FB_1 and BWP frequency band FB_2, while user equipment UE_6 is also assigned BWP frequency band FB_1 and BWP frequency band FB_2. Since user equipment UE_4 and user equipment UE_5 communicate with base station BS_A and base station BS_C on different BWP frequency bands FB_4 and FB_1 and FB_2, respectively, no interference occurs between user equipment UE_4 and user equipment UE_5. Similarly, no interference occurs between user equipment UE_1 and user equipment UE_6.

The non-interfering user equipment(s) are then assigned the BWP frequency band(s) not allocated to the interfering user equipment(s). For example, since user equipment UE_3 does not interfere with the groups of user equipment UE_1, user equipment UE_4, user equipment UE_5, and user equipment UE_6, user equipment UE_3 has BWP frequency bands FB_1 to FB_3 that are not assigned to user equipment UE_4. is assigned.

Thereafter, step 1710 is performed. In step 1710, a complete graph CG(q) is selected from one or more other complete graphs, and the available BWP bandwidth is determined based on the amount of user equipment at each base station of the complete graph CG(q) and the complete graph. It is allocated according to the BWP bandwidth allocation result of CG(p). The selected complete graph CG(q) has the maximum overlapped node(s) with the complete graph CG(p). For example, the complete graph {N_A, N_B, N_D} is selected as the complete graph CG(q). For example, multiple user equipments that interfere with each other in a base station combination according to the complete graph CG(q) are grouped. That is, user equipment UE_1, user equipment UE_2, and user equipment UE_4 are grouped.

Since user equipment UE_2 interferes with user equipment UE_1 and user equipment UE_4, user equipment UE_2 is assigned BWP frequency band FB_1 and BWP frequency band FB_2 that are not assigned to user equipment UE_1 and user equipment UE_4. Since user equipment UE_2 and user equipment UE_1 communicate with base station BS_B and base station BS_D on different BWP frequency bands FB_1 and FB_2 and FB_3, respectively, no interference occurs between user equipment UE_1 and user equipment UE_2.

Next, step 1712 is performed. At step 1712, the allocation results are recorded. Next, the process moves to step 1714. At step 1714, it is determined whether there are other complete graphs to which available BWP bandwidth has not yet been allocated. The determination of step 1714 is Yes because the available BWP bandwidth of the complete graph {N_G} has not yet been allocated. Next, moving to step 1716, the value of parameter q is added by one. Next, the process moves to step 1710.

In step 1710, complete graph {N_G} is selected as complete graph CG(q) (q=2). Since user equipment UE_7 does not interfere with any other user equipment of other base stations, all of the available BWP bandwidth can be allocated to user equipment UE_7. That is, as shown in FIGS. 18C and 18D, the BWP frequency bands FB_1 to FB_4 are assigned to the user equipment UE_7.

If the determination in step 1714 is No, the process moves to step 1718. At step 1718, allocation results for the network are recorded. That is, the allocation results for all user equipments of all base stations are recorded. Next, in step 1720, it is determined whether there are any complete graphs that have not yet been taken into action. For example, the complete graph {N_A, N_B, N_D} and the complete graph {N_G} have not yet been taken as the operation start graph, so the determination is Yes and the process moves to step 1722. In step 1722, the value of parameter p is added by 1 and the process moves to step 1704. In step 1704, for example, the complete graph {N_A, N_B, N_D} is taken as the starting graph, and steps 1706 through 1720 are repeated.

The step 1208 of FIG. 12 of finding a BWP resource allocation result that complies with the SLA is described in more detail below. FIG. 19 shows an allocation result table by taking the complete graph {N_A, N_C, N_D} as the operation start graph. The allocation result table in FIG. 19 shows the user equipment ID and the corresponding allocated BWP bandwidth (percentage of available BWP bandwidth). According to the allocation result table in FIG. 19, it is determined whether the modulation, code rate, and throughput satisfy the SLA requirements. Once the SLA requirements are met, the allocation results are accepted and step 412 of FIG. 4 is then performed.

In some embodiments, the process in FIG. 17 may end once the SLA requirements are met. For example, the process in FIG. 17 can be terminated (e.g., the method (can stop at step 1720). In some embodiments, the process in FIG. 17 is completed for all complete graphs taken into the operation start graph, and then the best allocation result is taken to perform step 412 of FIG. 4.

20A and 20B illustrate an example application of a method of BWP management for a network, according to an embodiment of the present application. FIG. 20A shows an unmanned aerial vehicle (UAV) racing field, and FIG. 20B shows a block diagram for a network of UAV racing fields. The field size of the UAV racing field is 60m x 30m, the UAV racing field is a 5G (fifth generation) field with two base stations, and the bandwidth is time division duplex ( It is assumed that the frequency is 100 MHz with time-division duplexing (TDD). In this example, assume that four UAVs are flying simultaneously.

As shown in FIG. 20B, the controller is implemented by an open RAN (O-RAN) near real time (RT) RAN intelligent controller (RIC) 2002. The RIC 2002 includes, for example, an enrichment information interface 2004, an EI handler 2006, a BWP application 2008, a subscription manager 2010, and a sending interface. (transmission interface) 2012. EI interface 2004 receives EI data (eg, UAV location data). EI handler 2006 processes EI data. BWP application 2008 performs calculations regarding how to manage BWP for the network. Subscription manager 2010 is configured to subscribe to BWP functions of base stations. Transmission interface 2012 is configured to communicate with multiple base stations 2016 of private network 2014. Private network 2014 includes multiple base stations 2016 (eg, gNBs (Next Generation Node Bs)) and multiple UAVs 2018.

See FIG. 21. FIG. 21 is an example sequence diagram for the network of UAV racing fields of FIGS. 20A and 20B. First, the base station 2016 sends a message to notify the transmission interface 2012 that the connection between the RIC 2002 and the base station 2016 has been established. BWP application 2008 then sends a message to notify base station 2016 that RIC 2002 has detected that a new base station has been attached. Further, the BWP application 2008 sends a command to execute the subscription to the subscription manager 2010. Next, the subscription manager 2010 sends a command to execute the subscription to the base station 2016, and the base station 2016 returns acceptance of the subscription.

UAV 2018 then sends a message to notify base station 2016 that UAV 2018 is connected to base station 2016. UAV 2018 periodically reports UAV 2018 location data to EI server 2020 (not shown in FIGS. 20A and 20B). The EI server 2020 notifies the location data of the UAV 2018 to the EI interface 2004, the EI interface 2004 sends the location data of the UAV 2018 to the EL handler 2006, and the EI handler 2006 sends the location data of the UAV 2018 to the BWP application 2008. . The BWP application 2008 allocates BWP resources according to the location data of the UAV 2018 according to a method of BWP management for a network according to an embodiment of the present application. BWP application 2008 issues a BWP switching command to base station 2016 according to the allocation result, and base station 2016 issues a BWP switching command to UAV 2018.

A method of BWP management for a network, and a controller therefor, allows modulation and code rates to be increased. Thereby, the throughput of signal transmission is improved by dynamically generating at least one base station combination and performing BWP resource allocation based on the at least one base station combination and interference status of multiple user equipments. Ru. The obtained BWP resource allocation results can enable the private 5G network to meet dynamic SLA guarantees and achieve high quality of experience (QoE). Furthermore, mobile user equipment may have stable QoE, different QoE requirements for different user equipments may be met, and dynamically changed QoE requirements of user equipments may be met.

It will be apparent to those skilled in the art that various modifications and variations can be made to the disclosed embodiments. It is intended that the specification and examples be considered as exemplary only, with the true scope of the disclosure being indicated by the following claims and their equivalents.

Claims (12)

A method of bandwidth part (BWP) management for a network performed by a controller, the method comprising:
The method includes receiving location information of a plurality of user equipment;
The network includes a plurality of base stations in communication with a plurality of the user equipments, the plurality of user equipments including a first user equipment and a second user equipment,
The method includes determining the interference status of any of the plurality of user equipments based on the location information of the plurality of user equipments and the location information of the plurality of base stations to obtain the interference status of the plurality of user equipments. determining whether interference exists between two user equipment;
The method includes the step of generating at least one base station combination;
There is interference between the user equipment(s) of any two base stations in each of the at least one said base station combination, and the at least one said base station combination the first base station combination includes a first base station and a second base station, the first base station in communication with the first user equipment, and the second base station in communication with the first user equipment. communicating with two user equipments, and there is interference between the first user equipment and the second user equipment;
The method includes performing BWP resource allocation based on at least one of the base station combinations and the interference status of the plurality of user equipments to obtain a BWP resource allocation result;
In the BWP resource allocation result, the first user equipment is assigned a first BWP frequency band, the second user equipment is assigned a second BWP frequency band, and the first BWP frequency band is the same as the second BWP frequency band. is different, in a different way. For downlink communication, the distance between the second user equipment and the first base station minus the distance between the first user equipment and the first base station is less than a first interference radius. when it is determined that interference exists between the first user equipment and the second user equipment;
For uplink communication, the distance between the first user equipment and the second base station minus the distance between the first user equipment and the first base station is less than a second interference radius. 2. The method of claim 1, wherein it is determined that interference exists between the first user equipment and the second user equipment when . the unit bandwidth of the first BWP frequency band is obtained by dividing the available BWP bandwidth by P, Q or N;
P, Q and N are integers,
P is the amount of user equipment of a particular base station in the first base station combination;
the particular base station has the largest amount of user equipment in the first base station combination;
Q is the amount of mutually interfering user equipment in the first base station combination;
2. The method of claim 1, wherein N is a maximum number selected from P and Q. further comprising: establishing a relationship graph for the network;
The relationship graph includes a plurality of nodes and a plurality of connection lines, the plurality of nodes include a first node and a second node, and the plurality of connection lines connect the first connection line. wherein the first node represents the first base station, the second node represents the second base station, and the first connection connects the first node and the second node;
The relational graph includes at least one complete graph corresponding to at least one of the base station combinations, and the at least one complete graph includes a first complete graph corresponding to the first base station combination;
2. The method of claim 1, wherein the mutually interfering user equipments in the plurality of base stations of the first complete graph are assigned different BWP frequency bands in the BWP resource allocation result. The first base station combination further includes a third base station, the plurality of user equipment further includes a third user equipment, the third user equipment communicates with the third base station, and the third base station The user equipment is assigned a third BWP frequency band, the third BWP frequency band is different from the first BWP frequency band, and the third BWP frequency band is different from the second BWP frequency band,
The at least one base station combination further includes a second base station combination, the second base station combination includes the first base station and a fourth base station, and the plurality of user equipments 4 user equipment, the fourth user equipment communicating with the fourth base station, the fourth user equipment being assigned a fourth BWP frequency band, and the fourth BWP frequency band being the first BWP frequency band. 2. The method of claim 1, wherein the fourth BWP frequency band overlaps the second BWP frequency band. determining whether throughputs for the plurality of user equipments meet predetermined requirements in a service level agreement; and
further comprising: transmitting a first BWP switching command to the first user equipment through the first base station; and transmitting a second BWP switching command to the second user equipment through the second base station;
the first BWP switching command indicates that the first user equipment is assigned the first BWP frequency band;
2. The method of claim 1, wherein the second BWP switching command indicates that the second user equipment is assigned the second BWP frequency band. A controller for performing BWP management for a network, the controller comprising:
the controller comprises an information interface for receiving location information of a plurality of user equipment;
The network includes a plurality of base stations in communication with a plurality of user equipments, the plurality of user equipments including a first user equipment and a second user equipment,
The controller includes a processor;
The processor is configured to determine whether any of the plurality of user equipments, based on the location information of the plurality of user equipments and the location information of the plurality of base stations, to obtain interference status of the plurality of user equipments. configured to perform a step of determining whether interference exists between two user equipment;
The processor is configured to perform the step of generating at least one base station combination;
There is interference between the user equipment(s) of any two base stations in each of the at least one said base station combination, and the at least one said base station combination the first base station combination includes a first base station and a second base station, the first base station in communication with the first user equipment, and the second base station in communication with the first user equipment. communicating with two user equipments, and there is interference between the first user equipment and the second user equipment;
The processor is configured to perform the step of performing BWP resource allocation based on the at least one base station combination and the interference status of the plurality of user equipments to obtain a BWP resource allocation result. Ori,
In the BWP resource allocation result, the first user equipment is assigned a first BWP frequency band, the second user equipment is assigned a second BWP frequency band, and the first BWP frequency band is the same as the second BWP frequency band. is different from the controller. For downlink communication, the distance between the second user equipment and the first base station minus the distance between the first user equipment and the first base station is less than a first interference radius. when it is determined that interference exists between the first user equipment and the second user equipment,
For uplink communication, the distance between the first user equipment and the second base station minus the distance between the first user equipment and the first base station is less than a second interference radius. 8. The controller of claim 7, wherein it is determined that interference exists between the first user equipment and the second user equipment when . the unit bandwidth of the first BWP frequency band is obtained by dividing the available BWP bandwidth by P, Q or N;
P, Q and N are integers,
P is the amount of user equipment of a particular base station in the first base station combination;
the particular base station has the largest amount of user equipment in the first base station combination;
Q is the amount of mutually interfering user equipment in the first base station combination;
8. The controller of claim 7, wherein N is a maximum number selected from P and Q. The processor is further configured to perform the steps of establishing a relationship graph for the network;
The relationship graph includes a plurality of nodes and a plurality of connection lines, the plurality of nodes include a first node and a second node, and the plurality of connection lines connect the first connection line. wherein the first node represents the first base station, the second node represents the second base station, and the first connection connects the first node and the second node;
The relational graph includes at least one complete graph corresponding to at least one of the base station combinations, and the at least one complete graph includes a first complete graph corresponding to the first base station combination;
8. The controller of claim 7, wherein the mutually interfering user equipments in the plurality of base stations of the first complete graph are assigned different BWP frequency bands in the BWP resource allocation result. The first base station combination further includes a third base station, the plurality of user equipment further includes a third user equipment, the third user equipment communicates with the third base station, and the third base station The user equipment is assigned a third BWP frequency band, the third BWP frequency band is different from the first BWP frequency band, and the third BWP frequency band is different from the second BWP frequency band,
The at least one base station combination further includes a second base station combination, the second base station combination includes the first base station and a fourth base station, and the plurality of user equipments 4 user equipment, the fourth user equipment communicating with the fourth base station, the fourth user equipment being assigned a fourth BWP frequency band, and the fourth BWP frequency band being the first BWP frequency band. 8. The controller of claim 7, different from , and wherein the fourth BWP frequency band overlaps the second BWP frequency band. The processor includes:
determining whether throughputs for the plurality of user equipments meet predetermined requirements in a service level agreement; and
further configured to perform the steps of: transmitting a first BWP switching command to the first user equipment through the first base station; and transmitting a second BWP switching command to the second user equipment through the second base station. and
the first BWP switching command indicates that the first user equipment is assigned the first BWP frequency band;
8. The controller of claim 7, wherein the second BWP switching command indicates that the second user equipment is assigned the second BWP frequency band.

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