CN112543489B

CN112543489B - Method and device for controlling access of user equipment

Info

Publication number: CN112543489B
Application number: CN202011328877.5A
Authority: CN
Inventors: 是元吉; 谭定富; 武传国; 唐兵
Original assignee: Shanghai Qingkun Information Technology Co Ltd
Current assignee: Shanghai Qingkun Information Technology Co Ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2023-05-09
Anticipated expiration: 2040-11-24
Also published as: CN112543489A

Abstract

The embodiment of the invention provides a method and a device for controlling access of user equipment, which comprehensively consider the service priority of UE and the delayed scheduling condition of the UE in a first cell (source cell) to determine the priority factor of the UE to access a second cell (target cell), and control the access priority of the UE in the second cell by using the priority factor, so that the UE with more historical delay times can obtain the advance of the access order, and the past unfairness is compensated, thereby improving the access success rate of low-priority service and improving the user experience. Further consider the carrier-to-interference ratio of UE in the first district, can make the UE that the carrier-to-interference ratio is high, the priority access network, further promoted user experience.

Description

Method and device for controlling access of user equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for controlling access to a user equipment.

Background

With the development of wireless communication technology, wireless networks are increasingly widely used, and wireless access technology is continuously evolving. For example, fifth generation (5G) communication technology, or New Radio (NR) communication technology, has been in commercial use, and the convergence of satellite communication with terrestrial communication has also begun to enter the research phase. The third generation partnership project (3rd Generation Partnership Project,3GPP) working group also starts to research the integration of satellite communication and a ground wireless access network (such as a ground 5G network), constructs an integrated comprehensive communication network of sea, land, air, space and land, and meets the ubiquitous multiple service demands of users, which is an important direction of future communication development.

Because satellites are relatively far from the ground, satellite communications have a higher latency for User Equipment (UE) on the ground than ground communications, resulting in a reduced user experience.

Disclosure of Invention

In view of this, the present invention provides a method and apparatus for controlling access of a User Equipment (UE) in order to enhance user experience.

The invention provides a method for controlling UE access, which is executed by access network equipment and comprises the following steps: acquiring priority information of a service of the UE and information of delayed scheduling of the UE in a first cell; and determining a priority factor of the UE for admitting the second cell according to the priority information of the service of the UE and the information of the delayed scheduling of the UE in the first cell, wherein the priority factor determines the admittance priority of the UE in the second cell.

Further, in the above method, the carrier to interference ratio information of the UE in the first cell may be further used to determine a priority factor for the UE to admit into the second cell. Namely, the method further comprises the following steps: acquiring carrier-to-interference ratio information of the UE in a first cell; and determining a priority factor for the UE to admit to the second cell, comprising: and determining a priority factor of the UE admitting the second cell according to the priority information of the service of the UE, the information of the delayed scheduling of the UE in the first cell and the carrier-to-interference ratio information of the UE in the first cell.

When the access network device is the access network device where the second cell is located, i.e. the access network device where the UE is to be admitted, the method further includes: and determining the admission priority of the UE in the second cell according to the determined priority factor.

When the access network device is the access network device where the first cell is located, the method further includes: and sending the priority factor of the access of the UE to the second cell to the access network equipment where the second cell is located, and determining the access priority of the UE in the second cell by the access network equipment where the second cell is located.

Further, in addition to the above priority factors, the traffic type of the UE is also used to decide the admission priority of the UE in the second cell. The traffic types include Guaranteed Bit Rate (GBR) traffic and Non-guaranteed bit rate (Non-GBR) traffic, the GBR traffic has a higher admission priority than the Non-GBR traffic, and the priority factor determines the admission priority of the UE in all UEs requesting to admit the second cell, which have the same traffic type as the UE, i.e. the admission order of the UE in the group of UEs having the same traffic type as the UE.

Correspondingly, the invention also provides a device for controlling the access of the UE, which is positioned in the access network equipment and comprises: an acquiring unit, configured to acquire priority information of a service of the UE and information that the UE is scheduled in a first cell in a delayed manner; and the determining unit is used for determining a priority factor of the UE for admitting the second cell according to the priority information of the service of the UE and the information of the delayed scheduling of the UE in the first cell, wherein the priority factor determines the admittance priority of the UE in the second cell.

Further, the carrier-to-interference ratio information of the UE in the first cell may be further used to determine a priority factor for the UE to admit into the second cell, and the obtaining unit is further configured to: acquiring carrier-to-interference ratio information of the UE in a first cell; the determining unit is used for: and determining a priority factor of the UE admitting the second cell according to the priority information of the service of the UE, the information of the delayed scheduling of the UE in the first cell and the carrier-to-interference ratio information of the UE in the first cell.

When the access network device is the access network device where the second cell is located, i.e. the access network device where the UE is to be admitted, the determining unit is further configured to determine, according to the determined priority factor, an admission priority of the UE in the second cell.

When the access network device is the access network device where the first cell is located, the above apparatus further includes a sending unit, configured to send a priority factor for the UE to admit to the second cell to the access network device where the second cell is located, and configured to determine an admission priority of the UE in the second cell by the access network device where the second cell is located.

Correspondingly, the invention also provides a device for controlling the access of the UE, which is positioned in the access network equipment and comprises: a processor and a memory storing a program which, when invoked and executed by the processor, causes the apparatus to perform the above method of controlling admission of a UE.

Correspondingly, the invention further provides a computer readable storage medium comprising a program which, when being called and executed by a processor, causes the processor to execute the above method for controlling the admission of the UE.

In the method and the device for controlling the access of the UE, the access network equipment comprehensively considers the priority of the service of the UE and the delayed scheduling condition of the UE in the first cell (source cell) to determine the priority factor of the access of the UE to the second cell (target cell), and controls the access priority of the UE in the second cell by using the priority factor, so that the UE with more historical delay times can obtain the advance of the access sequence, and the past unfairness is compensated, thereby improving the access success rate of the low-priority service and improving the user experience. Further consider the carrier-to-interference ratio of UE in the first district, can make the UE that the carrier-to-interference ratio is high, the priority access network, further promoted user experience.

Drawings

Specific embodiments of the present invention will be described below by way of example with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a UE handover procedure according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a handover procedure of another UE according to an embodiment of the present invention;

fig. 4 is a schematic diagram of another method for controlling access of a UE according to an embodiment of the present invention;

fig. 5 is a schematic diagram of an apparatus for controlling UE admission according to an embodiment of the present invention;

fig. 6 is a schematic diagram of an access network device according to an embodiment of the present invention.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort. For simplicity of the drawing, only the parts relevant to the present invention are schematically shown in each drawing, and they do not represent the actual structure thereof as a product.

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the invention. As shown in fig. 1, the communication system includes AN Access Network (AN) 110 and a Core Network (CN) 120, and a User Equipment (UE) 130 accesses a wireless Network through the AN 110 and communicates with other networks, such as a Data Network (Data Network), through the CN 120.

The AN may also be referred to as a radio access network (Radio Access Network, RAN), and AN apparatus on the AN side may be referred to as AN apparatus or a RAN apparatus, and may also be referred to as a base station. The names thereof are different in different communication schemes, and may be referred to as an evolved Node B (eNB) in a long term evolution (Long Term Evolution, LTE) system, and a next generation Node B (gNB) in a 5G system, for example. The AN device may also be a Centralized Unit (CU), a Distributed Unit (DU), or include a CU and a DU.

The AN device communicates with the UEs through AN air interface (Uu), and the AN device may serve multiple UEs. When the quality of service of the UE in the AN device is deteriorated, for example, the channel quality is deteriorated, the AN device currently serving the UE may handover the UE to other AN devices to obtain better quality of service. AN apparatus that provides a service to a UE before handover is called a source AN apparatus, and AN apparatus that provides a service to a UE after handover is called a target AN apparatus. The target AN device may serve multiple UEs, and when the source AN device requests to hand in the UE to the target AN device, there may be one or more other UEs to be accessed to the target AN device, and at this time, the target AN device may control access of the UE through a certain admission principle, so as to ensure quality of service.

Currently, the target AN device performs admission control according to the priority provided by the quality of service (Quality of Service, qoS) information of the evolved packet system (Evolved Packet System, EPS) bearer. However, this approach cannot effectively protect the access success rate of the UE for the low priority service, and even the situation that the low priority UE cannot be accessed all the time occurs, so that the user experience is reduced.

In particular, with the evolution of technology, for example, in the communication system shown in fig. 1, AN apparatus is disposed on a satellite, and the satellite is farther from a UE on the ground, and satellite communication has a characteristic of high latency, so that if a UE with a lower service priority is not admitted, the latency problem is more obvious, and even the service is interrupted, resulting in worse user experience. Therefore, it is desirable to improve the access success rate of the UE with the low priority service, so as to reduce the situation that the UE with the low priority service is always unable to access, so as to improve the user experience.

Considering the above problems, when performing admission judgment, the embodiment of the invention comprehensively considers the priority of the service of the UE and the delayed scheduling condition of the UE in the source AN device to determine the admission priority (or admission sequence) of the UE in the target AN device, thereby properly protecting the access success rate of the UE with low priority service and improving the user experience.

Fig. 2 is a schematic diagram of a UE handover procedure according to an embodiment of the present invention. As shown in fig. 2, the process includes the steps of:

s210: the source AN device determines to handover the UE to the target cell.

The UE is currently served by a source AN device, and its serving cell is a cell under the source AN device, hereinafter referred to as a first cell or a source cell. After the UE establishes a Radio Resource Control (RRC) connection with the source cell, the source AN device may perform measurement configuration for the UE, and the UE may perform measurement on other cells according to the measurement configuration of the source AN device and report a measurement report to the source AN device. After receiving the measurement report, the source AN device may determine whether to switch the UE according to the measurement report, for example, if it finds that other cells can provide better service quality for the UE, it may trigger switching the UE to the cell that can provide better service quality, which is called a second cell or a target cell. At this time, the source AN device may perform step S220.

S220: the source AN device sends a request message to the target AN device requesting handover of the UE to a second cell under the target AN device.

When the source AN device and the target AN device are located on different satellites, the source satellite where the source AN device is located may send a request message to the target satellite where the target AN device is located through AN inter-satellite link.

When the source AN device and the target AN device are located on the land or the same satellite, the source AN device may transmit a request message to the target AN device through a link between the source AN device and the target AN device, e.g., communication between the source AN device and the target AN device may be through a wired link or a wireless link.

The target AN device receives the request message from the source AN device, and knows that the source AN device requests to access the UE to the second cell below the source AN device.

S230: the target AN equipment acquires the priority information of the service of the UE and the delayed scheduling information of the UE in the first cell, and determines the priority factor (also called admission priority factor) of the UE for admitting the second cell according to the priority information of the service of the UE and the delayed scheduling information of the UE in the first cell, wherein the priority factor determines the admission priority of the UE in the second cell.

Alternatively, the target AN device may acquire priority information of the service of the UE and information that the UE is scheduled in the first cell with delay from the source AN device. For example, the source AN device may carry the priority information of the service of the UE and the information of the delayed scheduling of the UE in the first cell in the above request message, so that in the above step S220, the priority information of the service of the UE and the information of the delayed scheduling of the UE in the first cell are sent to the target AN device, so that when knowing that the source AN device requests that the U be connected to the second cell below, the target AN device may obtain the priority information of the service of the source AN device and the information of the delayed scheduling of the UE in the first cell, and further determine the priority factor by using these information, thereby reducing the signaling overhead and the time delay of obtaining the information. Of course, the priority information of the traffic of the UE and the information that the UE is scheduled with delay in the first cell may also be transmitted to the target AN device independently of the request message.

Optionally, the target AN device may further acquire priority information of the service of the UE and information that the UE is scheduled in the first cell in a delayed manner from the CN. Or the target AN equipment acquires one of priority information of the service of the UE and information of delayed scheduling of the UE in the first cell from the CN, and acquires the rest of lower information from the source AN equipment.

S240: and the target AN equipment determines the admission priority of the UE in the second cell according to the priority factors.

S250: when the target AN device grants the UE access, the target AN device sends a response message, e.g., a handover confirm message, to the source AN device informing the source AN device that the UE is allowed access.

Specifically, the target AN device may determine the number of UEs that may be accessed according to the remaining resources of the second cell, and further determine whether the UE may be accessed to the second cell according to the access priority (or the ranking order) of the UE in all UEs requesting to access the second cell. Each UE requesting access to the second cell may make decisions in a similar manner, hereinafter referred to as current UE, to distinguish from other UEs.

The target AN device sends AN acknowledgement message to the source AN device of the current UE when the current UE is allowed to be admitted. Optionally, when the current UE is not allowed to be admitted, the target AN device may send a response message to the source AN device to notify the source AN device; or the source AN device does not send the response message, and when the source AN device does not receive the response message, the default target AN device refuses the current UE to cut in.

The service of the UE refers to the current service of the UE. In addition, the current service of the UE may be more than one, and if the UE currently has multiple services, the priority information of the service of the UE above refers to the priority information of the service of the UE currently having the highest priority.

The priority information of the traffic of the above UE may be embodied by a priority coefficient for indicating the priority of the traffic. For example, in 5G systems, to guarantee the end-to-end quality of service of traffic, qoS flow (flow) based QoS models are proposed that support QoS flow at guaranteed bit rate (Guaranteed Bit Rate, GBR) and QoS flow at Non-guaranteed bit rate (Non-GBR). The CN-side devices, e.g. session management function (Session Management function, SMF) nodes, are responsible for QoS control. When a protocol data unit (Protocol Data Unit, PDU) session is established, the SMF configures QoS parameters for the user plane management function (User Plane Function, UPF) node, AN device, UE. For uplink data, the UE matches the data packet according to the QoS rule, and the data packet is transmitted to the network side through the corresponding AN channel (radio bearer (RB)) from the matched QoS flow; for downstream data, the UPF matches the data according to packet detection rules (Packet Detection Rule, PDR), and the data packets are transmitted from the matched QoS flows to the UE through the corresponding AN channels. The Qos parameters include allocation and retention priority (Allocation and Retention Priority, ARP) parameters, which include priority (priority level) information defining the importance of the UE resource request, preemption capability, preemption possible, etc. The priority coefficient of the above traffic may be priority level information in the ARP parameter. The value range of the priority information is 1-15, and the smaller the value is, the higher the priority is.

Alternatively, other priority coefficients may be set, and the smaller the value of the priority coefficient, the higher the priority of the indicated service, or the larger the value of the priority coefficient, the higher the priority of the indicated service. The embodiment of the invention is not limited, and the following description will take as an example that the smaller the priority coefficient is, the higher the priority of the indicated service is. The range of service priorities may be set as desired.

The delay condition of the UE in the source AN device may be indicated by information that the UE is delayed to be scheduled in the source AN device, and the information that the UE is delayed to be scheduled in the source AN device refers to information that the UE is delayed to be scheduled in the first cell by the source AN device, abbreviated as information that the UE is delayed to be scheduled in the first cell. The information is, for example, a delay factor, which may be a ratio of the number of times the UE to be handed over (i.e., the above current UE) is delay-scheduled in the source AN device to the total number of times the source AN device is delay-scheduled in a plurality of time units. The number of the plurality of time units may be set as needed, and may be a plurality of time units before the source AN device determines to handover the UE to be handed over to the second cell. For example, the source AN device may dynamically maintain a table, count the number of times each UE is scheduled by delay in each time unit, and the reason for the delay scheduling may be congestion or insufficient resources, which is not limited by the present invention. Taking the number of delayed scheduling times of the UE to be switched in M time units from the (N-M) th time unit to the (N-1) th time unit, calculating a sum value of the delayed scheduling times, and recording the sum value as K; taking the total number of delay scheduling of source AN equipment in M time units from the (N-M) th time unit to the (N-1) th time unit, recording as L, wherein the total number of delay scheduling is the number of delay scheduling of all UE served by the source AN equipment, the number of delay scheduling of each UE can be one time or multiple times, and calculating the sum of the number of delay scheduling of the UE, namely L; at this time, K/L is the delay factor alpha of the UE to be switched. N, M, K and L are positive integers, where N is the time unit for the last time the UE to be switched was scheduled before the switch. The invention does not limit the value of M, and can be selected according to the needs, for example, the value of M can be any one of 80 to 160. The source AN device may have a plurality of cells, the serving cell of the UE is the first cell thereof, in one implementation, the statistics of the number of delayed scheduling times of each UE in each time unit by the source AN device refers to statistics of the number of delayed scheduling times of the UE served by all cells under the source AN device, and then all the UEs served by the source AN device refer to all the UEs served by any cell of the source AN device; in another implementation, the statistics of the number of times each UE is scheduled in each time unit by the source AN device refers to statistics of the number of times the UE served by the first cell is scheduled in a delayed manner, and all UEs served by the source AN device refer to all UEs accessing the first cell and served by the first cell.

The time unit may be a minimum scheduling unit time, and for different communication schemes, the time unit may be different, for example, may be a slot (slot) in a 5G system, may be a transmission time interval (transmission time interval, TTI) in an LTE system, and may be a mini-slot (mini-slot). The time unit may be set to a size as required, for example, S symbols, where S is a positive integer.

The source AN device may send the information of the table to the target AN device in order for the target AN device to determine a delay factor of the UE to be handed off at the source AN device (or first cell). Alternatively, the source AN device may determine the delay factor and send the delay factor to the target AN device.

As such, in one implementation, the target AN device obtains the delay factor of the current UE at the source AN device (or first cell) by: table information reflecting the situation that the current UE is delay-scheduled in the source AN device (or the first cell) is acquired from the source AN device, and a delay factor of the current UE is determined according to the table information. In another implementation, the target AN device obtains the delay factor of the current UE at the source AN device (or first cell) directly from the source AN device. The table information or the delay factor may be carried in the request message of step S220 above, or may be transmitted to the target AN device independently of the request message.

Similarly, the target AN device may acquire the priority coefficient of the service from the source AN device, and the priority coefficient may be carried in the request message in step S220 above, or may be sent to the target AN device independently of the request message.

After obtaining the priority coefficient and the delay factor of the service, the target AN device may calculate the admission priority factor according to the following formula by using the priority coefficient and the delay factor of the service:

beta=p1+ (1-alpha) ×15×ω, where β is a admission priority factor, P1 is a priority factor of the service, α is a delay factor of the UE at the source AN device (or the first cell), and ω is a weight factor; where the weight factor ω can be set according to tolerance requirements for the delay, e.g., ω is set to 0.382 in one implementation.

Taking a time unit as a slot as AN example, the source AN device counts the number of times each UE is scheduled in a delayed manner in each slot, so as to obtain a statistics table of the number of times each UE is scheduled in a delayed manner as shown in the following table 1 and a statistics table of the number of times all UEs served by the source AN device are scheduled in a delayed manner as shown in the following table 2.

TABLE 1

Slot numbering	N-M	N-99	……	N-1
					The number of times the UE to be handed over is scheduled with delay	K _N-M	K _N-99	……	K _N-1

TABLE 2

Slot Num	N-M	N-99	……	N-1
					Number of times all UEs are scheduled with delay	L _N-M	L _N-99	……	L _N-1

At this time, the admission priority factor of the UE is:

the meaning of each parameter is the same as described above.

Further, the carrier to interference ratio (Carrier to Interference Ratio, CRI) of the UE at the source AN device (or first cell) may be further used to consider the priority of the UE for admission to the second cell. Therefore, the UE with high carrier-to-interference ratio can be preferentially accessed into the network, and the user experience is further improved. In the above step S230, the target AN device further obtains the carrier-to-interference ratio information of the UE in the first cell, and determines the priority factor of the UE admitting the second cell according to the priority information of the service of the UE, the information that the UE is scheduled in the first cell in a delayed manner, and the carrier-to-interference ratio information.

The carrier-to-interference ratio information can be a carrier-to-interference ratio factor, namely, the carrier-to-interference ratios are sequenced and quantized to a preset numerical interval, and the value in the numerical interval determines the size of the carrier-to-interference ratio, wherein the smaller the value is, the better the carrier-to-interference ratio is; the reverse can be also performed, and the larger the value is, the better the carrier-to-interference ratio is. For example, the value interval may be 1-15. The embodiment of the present application is not limited, and larger or smaller sections may be set as needed.

At this time, the admission priority factor may be calculated according to the following formula by using the priority coefficient, delay factor and carrier-to-interference ratio factor of the service:

β=pl+ (1- α) ×15×ω1+γ×ω2, where β is a admission priority factor, P1 is a priority factor of a service, α is a delay factor of the UE at the source AN device (or the first cell), γ is a carrier-to-interference ratio factor of the UE at the source AN device (or the first cell), ω1 and ω2 are weight factors; wherein the weight factors ω1 and ω2 may be set according to tolerance requirements for delay and carrier to interference ratio, for example ω1 is set to 0.382 and ω2 is set to 0.618 in one implementation.

Also taking a time unit as a slot as AN example, the source AN device counts the number of times each UE is scheduled in a delayed manner in each slot, so as to obtain a statistics table of the number of times each UE is scheduled in a delayed manner as shown in table 1 and a statistics table of the number of times all UEs served by the source AN device are scheduled in a delayed manner as shown in table 2.

At this time, the admission priority factor of the UE is:

the meaning of each parameter is the same as described above.

In the above method, the admission priority factor is determined by the target AN device, and then the UEs are admission ordered according to the admission priority factor. In another implementation, the admission priority factor is determined by the source AN device and then sent to the target AN device. Since each source AN device determines the admission priority factor in the same manner, the target AN device can directly use the admission priority factor to perform admission sequencing on all UEs requesting admission. In this way, the number or size of cells transferred between the source AN device and the target AN device can be reduced, reducing signaling overhead.

Fig. 3 is a schematic diagram of a handover procedure of another UE according to an embodiment of the present invention. As shown in fig. 3, the process includes the steps of:

s310: the source AN device determines to handover the UE to the target cell.

This step is the same as the above description of step S210 and will not be described in detail here.

S320: the source AN device determines a priority factor (also referred to as admission priority factor) for the UE to admit to the second cell, which determines the admission priority of the UE in the second cell.

In one implementation, the source AN device determines a priority factor for the UE to admit to the second cell based on priority information of the UE's traffic and information that the UE is scheduled in the first cell with delay. In another implementation, the source AN device determines a priority factor of the UE admitting the second cell according to priority information of the service of the UE, information that the UE is scheduled in a delay manner in the first cell, and carrier-to-interference ratio information of the UE in the first cell.

The method for determining the priority factor by the source AN device is similar to the method for determining the priority factor by the target AN device, and will not be described in detail herein.

S330: the source AN device sends a request message to the target AN device requesting handover of the UE to a second cell under the target AN device cell, and the priority factor above.

Optionally, the source AN device may send the priority factor to the target AN device with the priority factor in the request message, so that signaling overhead may be saved. Alternatively, the source AN device may send the priority factor and the request message independently to the target AN device.

S340: and the target AN equipment determines the admission priority of the UE in the second cell according to the priority factor.

S350: when the target AN device grants the UE access, the target AN device sends a response message, e.g., a handover confirm message, to the source AN device informing the source AN device that the UE is allowed access.

Steps S340 and S350 are similar to steps S240 and S250 above, and are not repeated here.

In the method, the access network equipment comprehensively considers the service priority of the UE and the delayed scheduling condition of the UE in the first cell (source cell) to determine the priority factor of the UE for admitting the second cell (target cell), and controls the admittance priority of the UE in the second cell by using the priority factor, so that the UE with more historical delay times can obtain the advance of admittance order, and the past unfairness is compensated, thereby improving the admittance success rate of the low-priority service and improving the user experience. Further consider the carrier-to-interference ratio of UE in the first district, can make the UE that the carrier-to-interference ratio is high, the priority access network, further promoted user experience.

In addition, the embodiment of the invention further considers the requirement of the service with higher delay requirement, and hopes to provide better access guarantee for the service with higher delay requirement. Thus, the target AN device may further employ a layered admission mechanism for admission control. For example, the service type is divided into two layers, wherein one layer (referred to as layer one) is GBR service, the other layer (referred to as layer two) is Non-GBR service, and the priority of layer one is higher than that of layer two, and the target AN device preferentially admits the UE with layer one service. Further, in each layer, the method provided in the above embodiment may be used to determine a priority factor, and further control the admission priority by using the priority factor; and the AN equipment can complete the admission judgment of the multiple UE after the priority ordering of the two layers.

Therefore, in the above step S240 or S340, further including: the service type of the UE is determined.

The service type of the UE may be sent by the source AN device to the target AN device, i.e., the target AN device obtains the service type information of the UE from the source AN device. In one implementation, the source AN device may carry service type information of the UE in the request message, where the service type information indicates a service type of the UE, so that the target AN device may determine the service type of the UE when receiving the request message, thereby reducing signaling overhead and delay. In another implementation, the source AN device may send the request message and the traffic type information of the UE independently to the target AN device. Alternatively, the service type information of the UE may be sent by the CN device to the target AN device, i.e., the target AN device obtains the service type information of the UE from the CN device.

The traffic types of the UE include GBR traffic and Non-GBR traffic, for example.

The service type information of the UE may be indicated by 1 bit of indication information, for example, when the indication information is "1", GBR service is represented, and when the indication information is "0", non-GBR service is represented; the reverse is also possible. The indication information may also be more bits, for example 2 bits or more, and other values may be reserved for later expansion of more levels of traffic types.

Alternatively, the traffic type information of the UE may be a QoS parameter, such as a QoS class Identifier (QoS class Identifier, QCI) in the LTE system or a QoS Identifier (QI) in the NR. The QCI or QI has a corresponding relation with GBR service or Non-GBR, so that the service type of the UE can be determined according to the QCI or QI.

Since the admission priority of GBR traffic is higher than that of Non-GBR traffic, when the traffic type of the UE is GBR traffic, the admission priority (or sequence) of the UE is higher than that of other UEs whose traffic type is Non-GBR traffic; when the service type of the UE is Non-GBR service, the admission priority (or sequence) of the UE is lower than that of other UEs whose service type is GBR service.

Thus, the double-layer access control method based on the QoS mechanism can be realized, the control of the low delay of the GBR service flow is realized, and the access success rate of the low-priority service is properly improved through the access priority factor. Particularly in satellite communication, the time delay factor is considered in the admission control, so that the satisfaction degree of users can be further improved.

Reference is now made to fig. 4, which is a schematic diagram illustrating another method for controlling UE admission according to an embodiment of the present invention. As shown in fig. 4, the target AN device may perform the steps of:

s410: and determining the service type of the current UE, wherein the service type can be GBR service or Non-GBR service.

The determination method is the same as that described above, and will not be described in detail here.

When the service type is GBR service, the target AN device performs step S420, otherwise performs step S430.

S420: and entering a GBR service queue, namely placing the current UE into the GBR service queue, wherein the GBR service queue is a queue where the UE with the service type of GBR service is located.

S430: and entering a Non-GBR service queue, namely putting the current UE into the Non-GBR service queue, wherein the Non-GBR service queue is the queue where the UE with the service type of Non-GBR service is located.

And determining AN admission priority factor of each UE in the service queue according to each service queue, and sequencing the queues according to the admission priority factors, wherein the admission priority factor can be determined by the target AN equipment by adopting the method, or can be determined by directly acquiring the priority factor from the source AN equipment. Step S440 is performed for the UE of the GBR service, and step S450 is performed for the UE of the Non-GBR service.

S440: determining an admission priority factor of the current UE, and sequencing the UEs with all service types being GBR services according to the admission priority factor;

s450: determining an admission priority factor of the current UE, and sequencing all the UEs with the service types of Non-GBR service according to the admission priority factor;

s460: and merging the queues according to the condition that the admission priority of the GBR service is higher than that of the Non-GBR service, and deciding the number of the accessible UE according to the condition of the residual resources of the target cell.

In this way, it is possible to determine whether to allow the UE to be admitted or not based on the ordering of the current UE in the queue.

In the above steps S440 and S450, the method provided in the above embodiments may be used to determine the admission priority factor, and then the UEs of GBR traffic and the UEs of Non-GBR traffic are respectively ordered according to the admission priority factor. Alternatively, in the above steps S440 and S450, only the determination of the admission priority factor may be performed, without ranking, and in the subsequent step S460, the UE according to GBR service is before, the UE according to Non-GBR service is after, and further ranking according to the admission priority factor.

With continued reference to fig. 1, assume that for the same target AN device, 6 UEs are being applied to admit the target AN device, and that the target AN device only allows 5 UEs to admit current resources. Wherein, the service type of the UE0 is GBR service, and the priority is 1; the service type of the UE1 is GBR service, and the priority is 2; the service type of the UE2 is GBR service, and the priority is 3; the service type of the UE3 is Non-GBR service, and the priority is 4; the service type of the UE4 is Non-GBR service, and the priority is 5; the service type of the UE5 is Non-GBR service and the priority is 6.

In the prior art, after admission according to priority, admitted UEs are UE0, UE1, UE2, UE3 and UE4. By adopting the method provided by the embodiment of the invention, the delay factor of the UE3 is assumed to be 0, and the carrier-to-interference ratio factor gamma is assumed to be 1; the delay factor of the UE4 is 0.5, and the carrier-to-interference ratio factor gamma is 3; the delay factor of the UE5 is 0.25, and the carrier-to-interference ratio factor gamma is 5; if the carrier-to-interference ratio is not considered, the finally admitted UE is UE0, UE1, UE2, UE5 and UE4; if the carrier-to-interference ratio is considered, the finally admitted UEs are UE0, UE1, UE2, UE4, UE3.

The switching admission control method based on QoS mechanism double-layer decision can realize low time delay of high priority service flow and properly improve the admission success rate of low priority service. UEs with a large number of historic delays are advanced in the admission order, compensating for past unfairness. In addition, the UE with high carrier-to-interference ratio is enabled to access the network preferentially, and user experience is further improved.

Based on the same inventive concept, the embodiment of the present invention further provides AN apparatus, which may be AN device, or may be AN apparatus located in AN device, for example, a chip, a board, or the like, configured to perform a method performed by the target AN device or the source AN device in the foregoing method embodiment.

For example, please refer to fig. 5, which is a schematic diagram of an apparatus for controlling UE admission according to an embodiment of the present invention. As shown in fig. 5, the apparatus 500 is located in AN device, and includes AN acquisition unit 510 and a determination unit 520.

The acquiring unit 510 is configured to acquire priority information of a service of the UE and information that the UE is scheduled in a first cell in a delayed manner; the determining unit 520 is configured to determine a priority factor for the UE to admit into the second cell according to the priority information of the service of the UE and the information that the UE is scheduled in the first cell in a delayed manner, where the priority factor determines an admission priority of the UE in the second cell.

Further, the obtaining unit 510 is further configured to obtain carrier-to-interference ratio information of the UE in the first cell; the determining unit 520 is further configured to determine a priority factor for the UE to admit into the second cell according to priority information of a service of the UE, information that the UE is scheduled with delay in the first cell, and carrier-to-interference ratio information of the UE in the first cell.

When the AN device is a target AN device, i.e. the AN device where the second cell is located, the determining unit 520 is further configured to determine AN admission priority of the UE in the second cell according to the priority factor.

When the AN device is a source AN device, that is, when the AN device where the first cell is located, the apparatus further includes a sending unit 530, configured to send a priority factor of the UE admitting the second cell to the access network device where the second cell is located, where the access network device where the second cell is located determines AN admittance priority of the UE in the second cell.

In addition, the service type and the priority factor of the UE determine the admission priority of the UE in the second cell, and the service types include GBR service and Non-GBR service, wherein the admission priority of the GBR service is higher than the Non-GBR service, and the priority factor determines the admission priority of the UE in the UE requesting to admit the second cell in all the same service types as the UE.

The description of the priority information of the service of the UE, the information that the UE is scheduled with delay in the first cell, and the carrier-to-interference ratio information of the UE in the first cell are the same as the above embodiments, and are not repeated here.

The above division of the units of the communication device is merely a division of a logic function, and may be integrated into a physical entity in whole or in part or may be physically separated. And these units may all be implemented in software in the form of processor calls; or can be realized in hardware; and part of the units can be realized in a form of calling by a processor through software, and part of the units can be realized in a form of hardware.

For example, the functions of the above elements may be stored in a memory in the form of program code that is scheduled by a processor to implement the functions of the above elements. The processing element may be a general purpose processor such as a central processing unit (Central Processing Unit, CPU) or other processor that may invoke a program. As another example, each of the above units may be one or more integrated circuits configured to implement the above methods, e.g.: one or more Application Specific Integrated Circuits (ASICs), or one or more Digital Signal Processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs), etc. For another example, in combination with the two modes, part of the functions are realized by the form of processor scheduler codes, and part of the functions are realized by the form of hardware integrated circuits. And when the above functions are integrated together, they may be implemented in the form of a system-on-a-chip (SOC).

Fig. 6 is a schematic diagram of AN apparatus according to AN embodiment of the present invention. The above means may be located within AN apparatus 600. As shown in fig. 6, AN apparatus 600 includes a radio frequency device 610 and a baseband device 620. In the uplink direction, the radio frequency device 610 receives data transmitted by the UE through an antenna, and transmits the data transmitted by the UE to the baseband device 620 for processing. In the downlink direction, the baseband apparatus 620 processes data generated by the UE and transmits the processed data to the UE through the radio frequency apparatus 610 and the antenna. The baseband apparatus 620 includes an interface 621, a processor 622, and a memory 623. The interface 621 is for communicating with the radio frequency apparatus 610, the memory 623 is for storing program codes for implementing the above methods performed by the source AN device or the target AN device, and the processor 622 is for invoking the program codes to implement the above methods performed by the source AN device or the target AN device.

Based on the same inventive concept, embodiments of the present invention also provide a program product, such as a computer-readable storage medium, the apparatus computer-readable storage medium comprising program code,

those skilled in the art will appreciate that: all or part of the steps of implementing the above method embodiments may be implemented by hardware related to program instructions, where the above program may be stored in a computer readable storage medium, and when the program code is called by a processor, the processor is configured to execute the method performed by the AN device in the above method embodiments. The form and number of the memories and the processors are not limited in the embodiment of the invention, for example, the memories may be a CPU or other processor capable of calling a program, and the memories may be various media capable of storing a program code, such as a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

The foregoing is only a partial embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims

1. A method of controlling admission of user equipment performed by access network equipment, comprising:

acquiring priority information of a service of User Equipment (UE) and information of delayed scheduling of the UE in a first cell;

determining a priority factor of the UE to admit into a second cell according to the priority information and the information of the UE which is scheduled in a delay way in a first cell, wherein the priority factor determines the admittance priority of the UE in the second cell;

acquiring carrier-to-interference ratio information of the UE in the first cell;

the determining a priority factor for the UE to admit to a second cell includes:

and determining a priority factor of the UE admitting the second cell according to the priority information, the information of the UE delayed scheduling in the first cell and the carrier-to-interference ratio information.

2. The method of claim 1, wherein the access network device is an access network device in which the second cell is located, and further comprising:

and determining the admission priority of the UE in the second cell according to the priority factor.

3. The method of claim 1, wherein the access network device is an access network device in which the first cell is located, and further comprising:

and sending the priority factor of the access of the UE to the second cell to the access network equipment where the second cell is located, wherein the priority factor is used for determining the access priority of the UE in the second cell by the access network equipment where the second cell is located.

4. The method of claim 1, wherein the traffic type of the UE and the priority factor determine an admission priority of the UE in the second cell, and wherein the traffic types include guaranteed bit rate GBR traffic and Non-guaranteed bit rate Non-GBR traffic, the admission priority of the GBR traffic being higher than the Non-GBR traffic, and wherein the priority factor determines an admission priority of the UE in a UE admitted to the second cell for all requests having a traffic type identical to the traffic type of the UE.

5. An apparatus for controlling access of a user equipment, located in an access network device, comprising:

an obtaining unit, configured to obtain priority information of a service of a UE and information that the UE is scheduled in a first cell in a delayed manner;

a determining unit, configured to determine a priority factor of the UE admitting the second cell according to the priority information and information that the UE is scheduled in a delay in the first cell, where the priority factor determines an admittance priority of the UE in the second cell;

the determining unit is used for: and determining a priority factor of the UE admitting the second cell according to the priority information, the information of the UE delayed scheduling in the first cell and the carrier-to-interference ratio information.

6. The apparatus of claim 5, wherein the access network device is an access network device in which the second cell is located, and wherein the determining unit is further configured to:

7. The apparatus of claim 5, wherein the access network device is an access network device in which the first cell is located, and further comprising:

and the sending unit is used for sending the priority factor of the UE admitting the second cell to the access network equipment where the second cell is located, and determining the admittance priority of the UE in the second cell by the access network equipment where the second cell is located.

8. The apparatus of claim 5, wherein a traffic type of the UE and the priority factor determine an admission priority of the UE in the second cell, and wherein the traffic type comprises guaranteed bit rate GBR traffic and Non-guaranteed bit rate Non-GBR traffic, wherein the admission priority of the GBR traffic is higher than the Non-GBR traffic, and wherein the priority factor determines an admission priority of the UE in a UE admitted to the second cell for all requests having a traffic type that is the same as the traffic type of the UE.