CN112543490B - Method and device for admitting user equipment and method and device for switching user equipment - Google Patents

Method and device for admitting user equipment and method and device for switching user equipment Download PDF

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CN112543490B
CN112543490B CN202011329171.0A CN202011329171A CN112543490B CN 112543490 B CN112543490 B CN 112543490B CN 202011329171 A CN202011329171 A CN 202011329171A CN 112543490 B CN112543490 B CN 112543490B
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service
priority
admission
access network
target
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CN112543490A (en
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是元吉
谭定富
武传国
唐兵
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Shanghai Qingkun Information Technology Co Ltd
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Shanghai Qingkun Information Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/02—Access restriction performed under specific conditions
    • H04W48/06—Access restriction performed under specific conditions based on traffic conditions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/566—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient
    • H04W72/569—Allocation or scheduling criteria for wireless resources based on priority criteria of the information or information source or recipient of the traffic information

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the invention provides a method and a device for admitting user equipment and a method and a device for switching user equipment. The method is performed by a target access network device and comprises: receiving a request message from a source access network device, the request message being for requesting handover of a UE to a target cell of a target access network device; determining the service type of the UE; and determining the admission priority of the UE in the target cell according to the service type of the UE. Wherein the traffic types include Guaranteed Bit Rate (GBR) traffic and Non-guaranteed bit rate (Non-GBR) traffic, and the GBR traffic has a higher admission priority than the Non-GBR traffic. In the above access method, the target access network device performs access judgment according to the service type, so as to preferentially ensure the access of the service with higher delay requirement, and improve the user experience.

Description

Method and device for admitting user equipment and method and device for switching user equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for admitting a user equipment, and a method and an apparatus for switching 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 admitting a user equipment, and a method and apparatus for switching a user equipment, so as to improve user experience.
The invention provides a method for admitting User Equipment (UE), which is executed by target access network equipment, and comprises the following steps: receiving a request message from a source access network device, the request message being for requesting handover of a UE to a target cell of a target access network device; determining the service type of the UE; and determining the admission priority of the UE in the target cell according to the service type of the UE. Wherein the traffic types include Guaranteed Bit Rate (GBR) traffic and Non-guaranteed bit rate (Non-GBR) traffic, and the GBR traffic has a higher admission priority than the Non-GBR traffic.
In the above access method, the target access network device performs access judgment according to the service type, so as to preferentially ensure the access of the service with higher delay requirement, and improve the user experience.
Further, the target access network device comprehensively considers the priority of the service and the delay condition of the UE in the source access network device to determine the admission priority of the UE in the target access network device, so that the low time delay of the high-priority service flow is realized, the access success rate of the UE with low-priority service is properly protected, and the user experience is further improved.
Optionally, the target access network device acquires a priority coefficient of the service of the UE and a delay factor of the UE in the source access network device, and determines an admission priority factor according to the priority coefficient and the delay factor. Or the target access network equipment directly acquires the admission priority factor of the UE from the source access network equipment. The process of determining the admission priority of the UE in the target cell according to the service type of the UE comprises the following steps: and determining the admission priority of the UE in all the UEs requesting admission, wherein the service type of the UE is the same as that of the UE, according to the admission priority factor.
Correspondingly, the invention also provides a device for accessing the UE, which is positioned in the target access network equipment and comprises: a receiving unit, configured to receive a request message from a source access network device, where the request message is used to request handover of a UE to a target cell of a target access network device; and the determining unit is used for determining the service type of the UE and determining the admission priority of the UE in the target cell according to the service type of the UE. The service types comprise GBR service and Non-GBR service, and the admission priority of the GBR service is higher than that of the Non-GBR service.
Therefore, the target access network device can perform admission judgment according to the service type, so that the admission of the service with higher time delay requirement is preferentially ensured, and the user experience is improved. Furthermore, the target access network device can comprehensively consider the priority and the delay condition of the UE in the source access network device to determine the admission priority of the UE in the target access network device, so that the low time delay of the high-priority service flow is realized, the access success rate of the UE with low-priority service is properly protected, and the user experience is further improved.
Optionally, the above apparatus further includes an acquiring unit, configured to acquire a priority coefficient of a service of the UE and a delay factor of the UE in the source access network device; the determining unit is further configured to determine an admission priority factor according to the priority coefficient and the delay factor, and determine an admission priority of the UE in all UEs requesting admission having the same traffic type as the UE according to the admission priority factor.
Or, the above device further comprises an obtaining unit, configured to obtain an admission priority factor of the UE from the source access network device; and the determining unit is used for determining the admission priority of the UE in all the UEs requesting admission with the same service type as the UE according to the admission priority factor.
Correspondingly, the invention also provides a device for accessing the UE, which is positioned in the target 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 UE admission.
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 method for admitting the UE.
In another implementation, the present invention provides a method for UE handover, performed by a source access network device, including: determining to switch the UE to a target cell of target access network equipment; transmitting a request message to a target access network device, wherein the request message is used for requesting to switch the UE to the target cell, the request message comprises service type information of the UE, the service type information is used for indicating the service type of the UE, the service type of the UE is used for determining the admission priority of the UE in the target cell, and the service type comprises GBR service and Non-GBR service, wherein the admission priority of the GBR service is higher than that of the Non-GBR service; a response message is received from the target access network device, the response message indicating whether the target access network device is admitted to the UE.
Further, the source access network device sends the priority coefficient of the service of the UE and the delay factor of the UE in the source access network device to the target access network device, where the priority coefficient and the delay factor are used to determine the admission priority factor of the UE in the target cell, and the admission priority factor determines the admission priority of the UE in all UEs requesting to admit the target cell, where the service type of the UE is the same as that of the UE.
Optionally, the source access network device sends the priority coefficient of the service of the UE and the delay factor of the UE in the source access network device to the target access network device through the request message.
Or further, the source access network equipment determines the admission priority factor of the UE in the target cell according to the priority coefficient of the service of the UE and the delay factor of the UE in the source access network equipment, and sends the admission priority factor to the target access network equipment, wherein the admission priority factor determines the admission priority of the UE in all the UEs requesting to admit the target cell, wherein the service type of the UE is the same as that of the UE.
Optionally, the source access network device sends the admission priority factor of the UE in the target access network device to the target access network device through the request message.
Correspondingly, the invention provides a device for switching UE, which is positioned in source access network equipment and comprises: a determining unit, configured to determine to switch the UE to a target cell of a target access network device; a transmitting unit, configured to transmit a request message to a target access network device, where the request message is configured to request handover of a UE to a target cell, and the request message includes service type information of the UE, where the service type information is configured to indicate a service type of the UE, where the service type of the UE is configured to determine an admission priority of the UE in the target cell, and the service type includes Guaranteed Bit Rate (GBR) service and Non-guaranteed bit rate (Non-GBR) service, and the admission priority of the GBR service is higher than that of the Non-GBR service; and the receiving unit is used for receiving a response message from the target access network equipment, wherein the response message is used for indicating whether the target access network equipment is admitted into the UE.
Further, the sending unit is further configured to: and sending the priority coefficient of the service of the UE and the delay factor of the UE in the source access network equipment to the target access network equipment, wherein the priority coefficient and the delay factor are used for determining the admission priority factor of the UE in the target cell, and the admission priority factor determines the admission priority of the UE in all the UEs requesting to admit the target cell, wherein the service type of the UE is the same as that of the UE.
Optionally, the sending unit sends the priority coefficient of the service of the UE and the delay factor of the UE at the source access network device to the target access network device through the request message.
Or further, the determining unit is further configured to determine an admission priority factor of the UE in the target cell according to the priority coefficient of the service of the UE and the delay factor of the UE in the source access network device, and the sending unit is further configured to send the admission priority factor to the target access network device, where the admission priority factor determines an admission priority of the UE in all UEs requesting to admit the target cell, where the service type of the UE is the same as the service type of the UE.
Optionally, the sending unit sends the admission priority factor of the UE in the target access network device to the target access network device through the request message.
Correspondingly, the invention also provides a device for switching the UE, which is positioned in the source 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 UE handover.
Accordingly, the present invention also provides a computer-readable storage medium including a program which, when invoked and executed by a processor, causes the processor to perform the above method for UE handover.
In the above implementation manner, the source access network device sends the service type information of the UE to the target access network device, so that the target access network device can perform admission judgment based on the service type of the UE, thereby preferentially ensuring the admission of the service with higher delay requirement. Further, the priority of the service and the delay condition of the UE in the source access network equipment are comprehensively considered to determine the admission priority of the UE in the target access network equipment, so that low time delay of high-priority service flows is realized, and meanwhile, the access success rate of the UE with low-priority service is properly protected, so that user experience is improved.
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 method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a method for admitting UE according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another method for admitting UE according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an apparatus for UE admission according to an embodiment of the present invention;
fig. 6 is a schematic diagram of an apparatus for UE handover according to an embodiment of the present invention;
Fig. 7 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 access network device requests to switch the UE into the target AN device, there may be one or more other UEs to be switched into the target AN device, and at this time, the target AN device may control the access of the UE through a certain admission principle, so as to ensure the 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 does not meet the demands of the service with higher time-lapse requirements, so that the user experience is degraded.
In particular, as technology evolves, 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 it is desired to have better admission guarantee for services with higher latency requirements.
In addition, the UE with lower service priority cannot be switched to access, so that the problem of time delay is more obvious, even the service is interrupted, and the user experience is poorer. Therefore, it is further desired to improve the access success rate of the UE with low priority service, so as to reduce the situation that the UE with low priority cannot be accessed all the time, and further improve the user experience.
In consideration of the above problems, when performing admission judgment, the embodiment of the invention considers the type of service, thereby preferentially ensuring the admission of service with higher time delay requirement, and further comprehensively considering the priority of service and the delay condition of UE in source AN equipment to determine the admission priority (or admission sequence) of UE in target AN equipment, thereby realizing low time delay of high priority service flow, and properly protecting the access success rate of UE with low priority service, so as to improve user experience.
Fig. 2 is a schematic diagram of a handover procedure of a UE according to an embodiment of the present invention. As shown in fig. 2, the method comprises 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, which is referred to as 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 is found 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, where the cell is called a target cell, and the access network device where the target cell is located is the target AN device. 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 the target cell.
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 target cell below the source AN device.
S230: the target AN device determines the traffic type of the UE.
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 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, for example, guaranteed bit rate (Guaranteed Bit Rate, GBR) traffic and Non-guaranteed bit rate (Non-GBR) traffic.
The service type information of the UE may be indicated by 1 bit of indication information, for example, GBR service is represented when the indication information is "1", and Non-GBR service is represented when the indication information is "0". Conversely, the indication information may be more bits, for example, 2 bits or more, and other values may be reserved for later expansion of more levels of service 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, if the service type of the UE is determined according to the QCI or QI.
S240: the target AN device determines, according to the service type of the UE, AN admission priority of the UE in the target cell, which may also be referred to as AN admission order.
As described above, the traffic types of the UE may include GBR traffic and Non-GBR traffic, wherein the GBR traffic has a higher admission priority than the Non-GBR traffic. Then when the service type of the UE is GBR service, the admission priority (or sequence) of the UE is higher than the admission priority (or sequence) of other UEs whose service types are Non-GBR service; 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.
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 target cell, and further determine whether the UE may be accessed to the target cell according to the admission priority (or rank order) of the UE in all UEs requesting to access the target cell. Each UE requesting access to the target cell may make decisions in a similar manner, and the UE currently making the decision as to whether to admit is hereinafter referred to as the current UE, to distinguish it 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.
It can be seen that the embodiments of the present invention provide a method for admitting a UE, where the steps performed by the target AN device in the above handover procedure are performed by the target AN device or a device in the target AN device.
In addition, the embodiment of the invention provides a method for switching UE, which is implemented by the source AN equipment or a device in the source AN equipment.
In the above step S240, the target AN device uses 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 admission priority may be determined based on the priority of the service, or the admission priority may be determined by comprehensively considering the priority of the service and the delay condition of the UE in the source AN device; and the AN equipment can complete the admission judgment of the multiple UE after the priority ordering of the two layers.
The delay condition of the UE in the source AN device may be embodied by a delay factor, and the admission priority of the UE in the target AN device may be embodied by AN admission priority factor. Specifically, please refer to fig. 3, which is a schematic diagram of a UE access method according to an embodiment of the present invention. As shown in fig. 3, the method comprises the steps of:
S310: acquiring a priority coefficient of a service of a current UE and a delay factor of the current UE in source AN equipment;
s320: determining an admission priority factor of the current UE according to the priority coefficient and the delay factor;
s330: and determining the admission priority of the current UE in all the UEs requesting admission, which have the same service type as the current UE, according to the admission priority factor.
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 coefficient of the service of the UE above refers to the priority coefficient of the service of the UE currently having the highest priority.
The priority coefficient is used to indicate the priority of the traffic. For example, in 5G systems, qoS flow (flow) based QoS models are proposed that support QoS flow for GBR and QoS flow for Non-GBR in order to guarantee the end-to-end quality of service for traffic. 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 factor of the UE at the source AN device is used to represent the situation where the UE is delay scheduled in the source AN device. The delay factor may be a ratio of the number of times the UE to be handed over (i.e., the above current UE) is delay scheduled at 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 target 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 so that the target AN device determines a delay factor of the UE to be handed over at the source AN device. Alternatively, the source AN device may determine a delay factor for the UE and send the delay factor to the target AN device.
As such, in one implementation, the target AN device may obtain the delay factor of the current UE at the source AN device by: and acquiring form information reflecting the delayed scheduling condition of the current UE in the source AN equipment from the source AN equipment, and determining the delay factor of the current UE according to the form information. In another implementation, the target AN device obtains the delay factor of the UE at the source AN device 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, 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:
Figure BDA0002795302130000131
The meaning of each parameter is the same as described above.
In one implementation, AN admission priority factor is determined by a target AN device based on a priority factor and a delay factor; and then, the UEs with the same service type are arranged according to the order of the admission priority factors. In another implementation, the admission priority factor is determined by the source AN device based on the priority coefficient and the delay factor, and then the admission priority factor is sent to the target AN device. Since each source AN device determines the admission priority factor in the same manner, the target AN device may directly use the admission priority factor to rank UEs of the same service type in the order of the admission priority factors. 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.
Therefore, the double-layer access control method based on the QoS mechanism is provided in the method, the control of the low delay of the GBR service flow is realized, and the access success rate of the low-priority service is further properly improved. 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 admitting UE 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 UE, and sequencing the UE with all 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 simultaneously being applied for admission, and that the target AN device currently has resources to admit only 5 UEs. 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, if the delay factor of the UE3 is 0, the delay factor of the UE4 is 0.5, and the delay factor of the UE5 is 0.25, the finally admitted UE is UE0, UE1, UE2, UE5 and UE4.
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.
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 UE admission according to an embodiment of the present invention. As shown in fig. 5, the apparatus 500 is located in a target AN device, and includes a receiving unit 510 and a determining unit 520.
The receiving unit 510 is configured to receive a request message from a source AN device, the request message being configured to request handover of a UE to a target cell of a target AN device; the determining unit 520 is configured to determine a service type of the UE, and determine an admission priority of the UE in the target cell according to the service type of the UE, where the service types include GBR service and Non-GBR service, and the admission priority of the GBR service is higher than that of the Non-GBR service.
Further, the apparatus 500 may further comprise an acquisition unit 530. In one implementation, the acquiring unit 530 is configured to acquire a priority coefficient of a service of the UE and a delay factor of the UE at the source AN device; the determining unit 520 is configured to determine an admission priority factor according to the priority coefficient and the delay factor, and determine an admission priority of the UE in all UEs requesting admission with the same traffic type as the UE according to the admission priority factor. In another implementation, the obtaining unit 530 is configured to obtain AN admission priority factor of the UE from the source AN device; and the determining unit 520 is configured to determine, according to the admission priority factor, an admission priority of the UE in all UEs requesting admission, which have the same traffic type as the UE.
For another example, please refer to fig. 6, which is a schematic diagram of an apparatus for UE handover according to an embodiment of the present invention. As shown in fig. 6, the apparatus 600 is located in a source AN device, and includes a determining unit 610, a transmitting unit 620, and a receiving unit 630. The determining unit 610 is configured to determine to handover the UE to a target cell of a target AN device; the sending unit 620 is configured to send a request message to the target AN device, where the request message is configured to request handover of the UE to the target cell, the request message includes service type information of the UE, the service type information is configured to indicate a service type of the UE, where the service type of the UE is configured to determine AN admission priority of the UE in the target cell, and the service type includes GBR service and Non-GBR service, and the admission priority of the GBR service is higher than that of the Non-GBR service; the receiving unit 630 is configured to receive a response message from the target AN device, where the response message is used to indicate whether the target AN device admits the UE.
The sending unit 620 is further configured to send, to the target AN device, a priority coefficient of the traffic of the UE and a delay factor of the UE at the source AN device, where the priority coefficient and the delay factor are used to determine AN admission priority factor of the UE at the target cell, where the admission priority factor determines AN admission priority of the UE in UEs requesting to admit the target cell in all the UEs having the same traffic type as the traffic type of the UE.
Alternatively, the determining unit 610 is further configured to determine AN admission priority factor of the UE in the target cell according to the priority coefficient of the service of the UE and the delay factor of the UE in the source AN device, and the sending unit 620 is further configured to send the admission priority factor to the target AN device, where the admission priority factor determines AN admission priority of the UE in all UEs requesting to admit the target cell, where the service type of the UE is the same as the service type of the UE.
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. 7 is a schematic diagram of AN apparatus according to AN embodiment of the present invention. The above means are located within the AN device 700. As shown in fig. 7, AN apparatus 700 includes a radio frequency device 710 and a baseband device 720. In the uplink direction, the radio frequency device 710 receives data transmitted by the UE through an antenna, and transmits the data transmitted by the UE to the baseband device 720 for processing. In the downlink direction, the baseband device 720 processes data generated by the UE and transmits the processed data to the UE through the radio frequency device 710 and the antenna. The baseband device 720 includes an interface 721, a processor 722, and a memory 723. The interface 721 is for communicating with the radio frequency apparatus 710, storing 723 thereof for storing program codes for implementing the above methods performed by the source AN device or the target AN device, and the processor 722 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 (6)

1. A method for user equipment admission performed by a target access network device, comprising:
Receiving a request message from a source access network device, wherein the request message is used for requesting to switch User Equipment (UE) to a target cell of the target access network device;
determining the service type of the UE;
acquiring a priority coefficient of the service of the UE and a delay factor of the UE in the source access network equipment;
determining an admission priority factor according to the priority coefficient and the delay factor;
determining the admission priority of the UE in the target cell according to the service type of the UE, including:
determining the admission priority of the UE in all the UEs requesting admission, wherein the service type of the UE is the same as that of the UE, according to the admission priority factor; wherein the service types comprise guaranteed bit rate GBR service and Non-guaranteed bit rate Non-GBR service, and the admission priority of the GBR service is higher than that of the Non-GBR service.
2. The method as recited in claim 1, further comprising:
acquiring an admission priority factor of the UE from the source access network equipment;
and determining the admission priority of the UE in the target cell according to the service type of the UE, comprising:
and determining the admission priority of the UE in all the UEs requesting admission, wherein the service type of the UE is the same as that of the UE, according to the admission priority factor.
3. An apparatus for admitting user equipment, located in a target access network device, comprising:
a receiving unit, configured to receive a request message from a source access network device, where the request message is used to request handover of a user equipment UE to a target cell of the target access network device;
a determining unit, configured to determine a service type of the UE, and determine an admission priority of the UE in the target cell according to the service type of the UE, where the service types include guaranteed bit rate GBR service and Non-guaranteed bit rate Non-GBR service, and the admission priority of the GBR service is higher than the Non-GBR service;
an obtaining unit, configured to obtain a priority coefficient of a service of the UE and a delay factor of the UE in the source access network device;
the determining unit is further configured to determine an admission priority factor according to the priority coefficient and the delay factor, and determine an admission priority of the UE in all UEs requesting admission, which have the same service type as the UE, according to the admission priority factor.
4. A device according to claim 3, further comprising:
the acquiring unit is further configured to acquire an admission priority factor of the UE from the source access network device;
And the determining unit is used for determining the admission priority of the UE in all the UEs requesting admission, the service types of which are the same as the service types of the UE, according to the admission priority factor.
5. A method for user equipment handover performed by a source access network device, comprising:
determining to switch User Equipment (UE) to a target cell of target access network equipment;
transmitting a request message to the target access network device, where the request message is used for requesting to switch the UE to the target cell, the request message includes service type information of the UE, the service type information is used for indicating a service type of the UE, and the service type of the UE is used for determining an admission priority of the UE in the target cell, and the method includes: transmitting a priority coefficient of a service of the UE and a delay factor of the UE in the source access network equipment to the target access network equipment, wherein the priority coefficient and the delay factor are used for determining an admission priority factor of the UE in the target cell, and the admission priority factor determines an admission priority of the UE in the UE of which the service type is the same as that of the UE and the request is admitted into the target cell; or alternatively, the process may be performed,
The source access network equipment determines an admission priority factor of the UE in the target cell according to the priority coefficient of the service of the UE and the delay factor of the UE in the source access network equipment, and sends the admission priority factor to the target access network equipment, wherein the admission priority factor determines the admission priority of the UE in the UE of which the service type is the same as that of the UE and the admission priority of the UE in the target cell;
and the service types comprise guaranteed bit rate GBR service and Non-guaranteed bit rate Non-GBR service, and the admission priority of the GBR service is higher than that of the Non-GBR service;
and receiving a response message from the target access network equipment, wherein the response message is used for indicating whether the target access network equipment is admitted into the UE.
6. An apparatus for switching user equipment, located in a source access network device, comprising:
a determining unit, configured to determine to switch the UE to a target cell of the target access network device;
a sending unit, configured to send a request message to the target access network device, where the request message is configured to request handover of the UE to the target cell, where the request message includes service type information of the UE, where the service type information is configured to indicate a service type of the UE, where the service type of the UE is configured to determine an admission priority of the UE in the target cell, and the service type includes guaranteed bit rate GBR service and Non-guaranteed bit rate Non-GBR service, where the admission priority of the GBR service is higher than the Non-GBR service;
A receiving unit, configured to receive a response message from the target access network device, where the response message is used to indicate whether the target access network device is admitted into the UE;
the transmitting unit is further configured to: transmitting a priority coefficient of a service of the UE and a delay factor of the UE in the source access network equipment to the target access network equipment, wherein the priority coefficient and the delay factor are used for determining an admission priority factor of the UE in the target cell, and the admission priority factor determines an admission priority of the UE in the UE of which the service type is the same as that of the UE and the request is admitted into the target cell; or alternatively, the process may be performed,
the determining unit is further configured to determine an admission priority factor of the UE in the target cell according to a priority coefficient of a service of the UE and a delay factor of the UE in the source access network device, and the sending unit is further configured to send the admission priority factor to the target access network device, where the admission priority factor determines an admission priority of the UE in a UE that requests the same service type as the service type of the UE are admitted to the target cell.
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