User equipment access method and device, and user equipment switching method and device
阅读说明：本技术 用户设备准入方法和装置、用户设备切换方法和装置 (User equipment access method and device, and user equipment switching method and device ) 是由 是元吉 谭定富 武传国 唐兵 于 2020-12-21 设计创作，主要内容包括：本发明提供了一种用户设备准入方法和装置、用户设备切换方法和装置,包括：从源接入网设备接收请求消息,该请求消息用于请求将UE切换到目标接入网设备的目标小区,该请求消息包括该UE的业务的时延参数；根据该时延参数确定该UE的业务类型；且根据UE的业务类型确定UE在目标小区的准入优先级。其中,业务类型包括时延敏感业务和时延不敏感业务,时延敏感业务的准入优先级高于时延不敏感业务。按照准入优先级从高到低的顺序,在目标小区对请求准入的UE进行资源分配,能获得资源的UE可准入。可见,在以上准入方法中,目标接入网设备根据时延参数确定准入优先级,从而优先保证时延敏感业务的准入,以提升用户体验。(The invention provides a method and a device for user equipment access and a method and a device for user equipment switching, comprising the following steps: receiving a request message from a source access network device, wherein the request message is used for requesting to switch UE to a target cell of a target access network device, and the request message comprises a time delay parameter of a service of the UE; determining the service type of the UE according to the time delay parameter; and determining the admission priority of the UE in the target cell according to the service type of the UE. The service types comprise delay sensitive service and delay insensitive service, and the admission priority of the delay sensitive service is higher than that of the delay insensitive service. And according to the sequence from high to low of the admission priority, the UE requesting the admission is subjected to resource allocation in the target cell, and the UE capable of obtaining the resources can be admitted. Therefore, in the above admission method, the target access network device determines the admission priority according to the delay parameter, so as to preferentially ensure the admission of the delay sensitive service, thereby improving the user experience.)
1. A user equipment admission method 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, and the request message comprises time delay parameter information of service of the UE;
determining the service type of the UE according to the time delay parameter information;
determining the admission priority of the UE in the target cell according to the service type of the UE, wherein the service type comprises a delay sensitive service and a delay insensitive service, and the admission priority of the delay sensitive service is higher than that of the delay insensitive service;
and according to the sequence of the admission priority, the target cell carries out resource allocation on the UE which requests to be admitted, so that the UE which can obtain the resources can be admitted.
2. The user equipment admission method according to claim 1, further comprising:
determining reserved resources and unreserved resources of a current time unit of the target cell;
and the resource allocation is carried out on all the UE which requests the admission, including:
if the service type of the UE is a delay sensitive service, allocating resources to the UE in the reserved resources;
and if the service type of the UE is a delay insensitive service, allocating resources to the UE in the unreserved resources.
3. The method of claim 2, wherein if the service type of the UE is a delay sensitive service, allocating resources for the UE in the reserved resources comprises:
and if the service type of the UE is a time delay sensitive service and the reserved resources cannot meet the allocation requirement of the UE, allocating resources to the UE in the unreserved resources.
4. A method for user equipment admission according to claim 2, wherein the determination of reserved resources for the current time unit comprises:
determining the occupancy rates of the time delay sensitive service resources of a plurality of time units before the current time unit;
taking the average value of the occupancy rates of the time delay sensitive service resources of the plurality of time units as the reservation ratio of the current time unit;
and determining the reserved resources of the current time unit according to the reserved ratio.
5. A method for user equipment admission according to any of claims 1-4, further comprising:
acquiring a priority coefficient of the service of the UE;
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 UE which requests admission and has the same service type as that of the UE according to the priority coefficient.
6. An admission apparatus of user equipment, located in a target access network device, comprising:
a first receiving module, configured to receive a request message from a source access network device, where the request message is used to request to switch a user equipment UE to a target cell of the target access network device, and the request message includes delay parameter information of a service of the UE;
an admission priority determining module, configured to determine a service type of the UE according to the delay parameter information, and determine an admission priority of the UE in the target cell according to the service type of the UE, where the service type includes a delay-sensitive service and a delay-insensitive service, and the admission priority of the delay-sensitive service is higher than that of the delay-insensitive service;
and the resource allocation module is used for allocating resources to the UE requesting to be admitted in the target cell according to the sequence of the admission priority, so that the UE capable of obtaining the resources can be admitted.
7. The user equipment admission apparatus of claim 6, further comprising:
a resource determining module, configured to determine reserved resources and unreserved resources of a current time unit of the target cell;
the resource allocation module is further configured to allocate resources to the UE in the reserved resources if the service type of the UE is a delay sensitive service; and if the service type of the UE is a delay insensitive service, allocating resources to the UE in the unreserved resources.
8. The apparatus of claim 7, wherein:
the resource allocation module is further configured to allocate resources to the UE in the unreserved resources if the service type of the UE is a delay sensitive service and the reserved resources cannot meet the allocation requirement of the UE this time.
9. A method for switching user equipment, which is executed by a source access network device, is characterized by comprising the following steps:
determining a target cell for switching User Equipment (UE) to target access network equipment;
sending a request message to the target access network device, where the request message is used to request to switch the UE to the target cell, where the request message includes delay parameter information of a service of the UE, and the delay parameter information is used to indicate a service type of the UE, where the service type of the UE is used to determine an admission priority of the UE in the target cell, and the service type includes a delay-sensitive service and a delay-insensitive service, and the admission priority of the delay-sensitive service is higher than that of the delay-insensitive service;
receiving a response message from the target access network device, wherein the response message is used for indicating whether the target access network device is allowed to access the UE.
10. A user equipment switching apparatus located in a source access network device, comprising:
a determining module, configured to determine a target cell for switching a user equipment UE to a target access network device;
a sending module, configured to send a request message to the target access network device, where the request message is used to request that the UE be switched to the target cell, where the request message includes delay parameter information of a service of the UE, and the delay parameter information is used to indicate a service type of the UE, where the service type of the UE is used to determine an admission priority of the UE in the target cell, and the service type includes a delay-sensitive service and a delay-insensitive service, and an admission priority of the delay-sensitive service is higher than that of the delay-insensitive service;
a second receiving module, 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 allowed to access the UE.
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for user equipment admission and a method and an apparatus for user equipment handover.
Background
With the development of wireless communication technology, the application of wireless networks is more and more extensive, and wireless access technology is continuously evolving. For example, fifth generation (5G) mobile communication technology has been in commercial use, and convergence of satellite communication and terrestrial communication has also begun to enter the research phase. The 3rd Generation Partnership Project (3 GPP) working group also starts to study the convergence of satellite communication and terrestrial radio access networks (such as terrestrial 5G networks), and constructs a sea, land, air and ground integrated communication network to meet various ubiquitous business requirements of users, which is an important direction for future communication development.
Since the satellite is far from the ground, for User Equipment (UE) on the ground, the satellite communication has a higher time delay than the ground communication, and when the UE is switched to a certain target satellite cell, if the service cannot be switched and admitted in time, the disadvantage of the time delay will be more obvious, and even the service will be interrupted, so that the user experience will be reduced.
Disclosure of Invention
The invention aims to provide a user equipment access method and device and a user equipment switching method and device, which are used for solving the problem of user experience reduction caused by high time delay of satellite communication.
The technical scheme provided by the invention is as follows:
a user equipment admission method, 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, and the request message comprises time delay parameter information of service of the UE; determining the service type of the UE according to the time delay parameter information; determining the admission priority of the UE in the target cell according to the service type of the UE, wherein the service type comprises a delay sensitive service and a delay insensitive service, and the admission priority of the delay sensitive service is higher than that of the delay insensitive service; and according to the sequence of the admission priority, the target cell carries out resource allocation on the UE which requests to be admitted, so that the UE which can obtain the resources can be admitted.
Further, still include: determining reserved resources and unreserved resources of a current time unit of the target cell; and the resource allocation is carried out on all the UE which requests the admission, including: if the service type of the UE is a delay sensitive service, allocating resources to the UE in the reserved resources; and if the service type of the UE is a delay insensitive service, allocating resources to the UE in the unreserved resources.
Further, if the service type of the UE is a delay sensitive service, allocating resources to the UE in the reserved resources includes: and if the service type of the UE is a time delay sensitive service and the reserved resources cannot meet the allocation requirement of the UE, allocating resources to the UE in the unreserved resources.
Further, the determining of the reserved resource of the current time unit includes: determining the occupancy rates of the time delay sensitive service resources of a plurality of time units before the current time unit; taking the average value of the occupancy rates of the time delay sensitive service resources of the plurality of time units as the reservation ratio of the current time unit; and determining the reserved resources of the current time unit according to the reserved ratio.
Further, still include: acquiring a priority coefficient of the service of the UE; 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 UE which requests admission and has the same service type as that of the UE according to the priority coefficient.
The present invention also provides an access device for user equipment, which is located in a target access network device, and comprises: a first receiving module, configured to receive a request message from a source access network device, where the request message is used to request to switch a user equipment UE to a target cell of the target access network device, and the request message includes delay parameter information of a service of the UE; an admission priority determining module, configured to determine a service type of the UE according to the delay parameter information, and determine an admission priority of the UE in the target cell according to the service type of the UE, where the service type includes a delay-sensitive service and a delay-insensitive service, and the admission priority of the delay-sensitive service is higher than that of the delay-insensitive service; and the resource allocation module is used for allocating resources to the UE requesting to be admitted in the target cell according to the sequence of the admission priority, so that the UE capable of obtaining the resources can be admitted.
Further, still include: a resource determining module, configured to determine reserved resources and unreserved resources of a current time unit of the target cell; the resource allocation module is further configured to allocate resources to the UE in the reserved resources if the service type of the UE is a delay sensitive service; and if the service type of the UE is a delay insensitive service, allocating resources to the UE in the unreserved resources.
Further, the resource allocation module is further configured to allocate a resource to the UE in the unreserved resource if the service type of the UE is a delay sensitive service and the reserved resource cannot meet the current allocation requirement of the UE.
The invention also provides a user equipment switching method, which is executed by the source access network equipment and comprises the following steps: determining a target cell for switching User Equipment (UE) to target access network equipment; sending a request message to the target access network device, where the request message is used to request to switch the UE to the target cell, where the request message includes delay parameter information of a service of the UE, and the delay parameter information is used to indicate a service type of the UE, where the service type of the UE is used to determine an admission priority of the UE in the target cell, and the service type includes a delay-sensitive service and a delay-insensitive service, and the admission priority of the delay-sensitive service is higher than that of the delay-insensitive service; receiving a response message from the target access network device, wherein the response message is used for indicating whether the target access network device is allowed to access the UE.
The invention also provides a user equipment switching device, which is located in the source access network equipment and comprises: a determining module, configured to determine a target cell for switching a user equipment UE to a target access network device; a sending module, configured to send a request message to the target access network device, where the request message is used to request that the UE be switched to the target cell, where the request message includes delay parameter information of a service of the UE, and the delay parameter information is used to indicate a service type of the UE, where the service type of the UE is used to determine an admission priority of the UE in the target cell, and the service type includes a delay-sensitive service and a delay-insensitive service, and an admission priority of the delay-sensitive service is higher than that of the delay-insensitive service; a second receiving module, 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 allowed to access the UE.
The user equipment access method and device and the user equipment switching method and device provided by the invention can at least bring the following beneficial effects:
1. in the above method for user equipment access, the target access network device performs access judgment according to the delay parameter information of the service, so as to preferentially ensure the access of the delay sensitive service and improve the user experience.
2. Furthermore, the target access network device reserves resources for the delay sensitive service, the delay sensitive service preferentially uses the reserved resources and the unreserved resources, and the delay insensitive service can only use the remaining unreserved resources, so that the low delay of the delay sensitive service is ensured, and the user experience is further improved.
3. The source access network equipment sends the time delay parameter information of the service of the UE to the target access network equipment, so that the target access network equipment can carry out admission judgment based on the time delay parameter information of the service of the UE, and the admission of the time delay sensitive service is preferentially ensured.
Drawings
The above features, technical features, advantages and implementations of the method and apparatus for user equipment admission, the method and apparatus for user equipment handover will be further explained in the following detailed description of preferred embodiments in a clearly understandable manner with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a UE handover process according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a method for UE admission according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a resource allocation method in step S250 in FIG. 1 or step S360 in FIG. 2;
fig. 4 is a schematic diagram of a UE admission apparatus according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an apparatus for UE handover according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a communication system 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 be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically depicted, or only one of them is labeled. In this document, "one" means not only "only one" but also a case of "more than one".
Please refer to fig. 6, which is a diagram illustrating a communication system according to an embodiment of the present invention. As shown in fig. 6, the communication system includes AN Access Network (AN) 110 and a Core Network (Core Network, CN)120, and a User Equipment (UE) 130 accesses to 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 (RAN), and the device on the AN side may be referred to as AN device or a RAN device, and may also be referred to as a base station. The names of the different communication systems are different, for example, in a Long Term Evolution (LTE) system, the communication system may be referred to as an evolved Node B (eNB), and in a 5G system, the communication system may be referred to as a next generation Node B (gnb). AN apparatus may also be a Centralized Unit (CU), a Distributed Unit (DU), or include a CU and a DU.
The AN device communicates with the UE over AN air interface (Uu), and the AN device can serve a plurality of UEs. When the quality of service of the UE in the AN device becomes poor, for example, the channel quality becomes poor, the AN device currently serving the UE may handover the UE to another AN device to obtain better quality of service. The AN device providing service for the UE before the handover is called a source AN device, and the AN device providing service for the UE after the handover is called a target AN device. The target AN equipment can serve a plurality of UEs, when the source access network equipment requests to switch the UE into the target AN equipment, other UE or UEs may be to be accessed into the target AN equipment, and at the moment, the target AN equipment can control the access of the UE through a certain admission principle so as to ensure the service quality.
Currently, a target AN device performs admission control according to a priority level provided by Quality of Service (QoS) information carried by AN Evolved Packet System (EPS). However, this approach cannot meet the requirement for the service with higher latency requirement, so that the user experience is degraded.
In particular, as the technology evolves, for example, in the communication system shown in fig. 6, the AN device is disposed on a satellite, and the satellite is farther away from the terrestrial UE, the satellite communication has a feature of high time delay, and therefore, it is desirable to have better admission guarantee for the service with higher time delay requirement.
In view of the above problems, in the embodiment of the present invention, when performing admission judgment, according to the delay parameter information provided by the service QoS information, the service is divided into two types, namely, a delay sensitive service and a delay insensitive service, and admission of the delay sensitive service is preferentially ensured, and further, a resource is reserved for the delay sensitive service, the delay sensitive service preferentially uses a reserved resource and a non-reserved resource, and the delay insensitive service can only use the remaining non-reserved resource, so as to determine the admission priority (or admission order) of the UE in the target AN device, thereby implementing low delay of the delay sensitive service and improving user experience.
Please refer to fig. 1, which is a diagram illustrating a UE handover procedure according to an embodiment of the present invention. As shown in fig. 1, 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 the source AN device, and its serving cell is a cell under the source AN device, which is called a source cell. After the UE establishes Radio Resource Control (RRC) connection with the source cell, the source AN device may perform measurement configuration for the UE, and the UE may measure other cells according to the measurement configuration of the source AN device and report a measurement report to the source AN device. After the source AN apparatus receives the measurement report, it may determine whether to handover the UE according to the measurement report, for example, if it is found that there are other cells that can provide better quality of service for the UE, it may trigger handover of the UE to a cell that can provide better quality of service, where the cell is referred to as a target cell, and AN access network apparatus where the target cell is located is the target AN apparatus. At this time, the source AN apparatus may perform step S220.
S220: the source AN equipment sends a request message to the target AN equipment, and the request message is used for requesting to switch the UE to the target cell.
When the source AN device and the target AN device are located on different satellites, a source satellite where the source AN device is located may send a request message to a target satellite where the target AN device is located through AN inter-satellite link.
When the source AN apparatus and the target AN apparatus are located on the land or the same satellite, the source AN apparatus may transmit the request message to the target AN apparatus through a link between the source AN apparatus and the target AN apparatus, for example, the source AN apparatus and the target AN apparatus may communicate through a wired link or a wireless link therebetween.
The request message is used for requesting to switch the user equipment UE to a target cell of the target access network equipment. The request message includes QoS information of the service requested by the UE, and the QoS information includes Delay parameter information, such as Packet Delay Budget (PDB).
S230: the target AN device determines the traffic type of the UE.
The target AN equipment receives the request message from the source AN equipment and learns the QoS information of the service of the UE. And acquiring delay parameter information, such as PDB (packet data base) from the QoS information, and dividing services into delay sensitive services and delay insensitive services according to the delay parameter information. For example, when the PDB is less than or equal to the threshold T, the delay sensitive service is included; otherwise, the delay insensitive service is included.
The target AN device thus determines the traffic type of the UE. The service types of the UE comprise delay sensitive service and delay insensitive service.
S240: and the target AN equipment determines the admission priority of the UE in the target cell according to the service type of the UE.
The admission priority may also be referred to as an admission order. As described above, the traffic type of the UE may include delay sensitive traffic and delay insensitive traffic, where the admission priority of the delay sensitive traffic is higher than that of the delay insensitive traffic. When the service type of the UE is the delay sensitive service, the admission priority of the UE is higher than the admission priorities of other UEs of which the service type is the delay insensitive service; when the service type of the UE is the delay insensitive service, the admission priority of the UE is lower than the admission priorities of other UEs of which the service type is the delay sensitive service.
S250: and according to the sequence of the admission priority, performing resource allocation on all the UE requesting to be admitted, wherein the UE capable of obtaining the resources can be admitted.
And all the UE requesting admission are arranged from high to low according to the admission priority, and resources are distributed to the UE in sequence. UEs that can obtain resources may be admitted, otherwise not.
S260: when the target AN device grants the UE access, the target AN device sends a response message, such as a handover confirm message, to the source AN device to inform the source AN device that the UE is allowed to access.
Specifically, the target AN device may determine the number of accessible UEs according to the remaining resources of the target cell, and further determine whether the UE can be accessed to the target cell according to the admission priorities (or the arrangement orders) of the UEs in all UEs requesting to access to the target cell. Each UE requesting to access the target cell may perform a decision in a similar manner, and the UE currently determined whether to be admitted is referred to as a current UE hereinafter to be distinguished from other UEs.
And the target AN equipment sends a confirmation message to the source AN equipment of the current UE when the current UE is allowed to access. 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 not sending the response message, and when the source AN equipment does not receive the response message, the default target AN equipment rejects the current UE hand-in.
It can be seen that the embodiments of the present invention provide a method for UE admission, where the target AN device or a device in the target AN device performs the steps performed by the target AN device in the handover procedure.
In addition, the embodiment of the present invention provides a method for UE handover, where the source AN device or a device in the source AN device performs the steps performed by the source AN device in the handover process.
In the above step S240, the target AN device adopts a layered admission mechanism for admission control. For example, if the traffic type is divided into two layers, wherein one layer (referred to as layer one) is delay-sensitive traffic, the other layer (referred to as layer two) is delay-insensitive traffic, and the priority of layer one is higher than that of layer two, the target AN device preferentially admits UEs with layer one traffic. Further, in each layer, admission priority may be determined based on the priority of the traffic; the target AN device may then complete the multi-UE admission decision after two layers of prioritization. Specifically, please refer to fig. 2, which is a schematic diagram of a UE admission method according to an embodiment of the present invention. As shown in fig. 2, the target AN device may perform the following steps:
s310: and determining the service type of the current UE, wherein the service type can be delay sensitive service or delay insensitive service.
The determination method is the same as that described above, and is not described herein again.
When the service type is the delay sensitive service, the target AN device performs step S320, otherwise, performs step S330.
S320: and entering a delay sensitive service queue, namely putting the current UE into the delay sensitive service queue, wherein the delay sensitive service queue is a queue where the UE with the service type of delay sensitive service is located.
S330: and entering a delay insensitive service queue, namely, putting the current UE into the delay insensitive service queue, wherein the delay insensitive service queue is a queue where the UE with the service type of delay insensitive service is located.
Step S340 is performed for the UE for the delay-sensitive service, and step S350 is performed for the UE for the delay-insensitive service.
Step S340: acquiring a priority coefficient of UE, and sequencing the UE of which all service types are delay sensitive services according to the priority coefficient;
step S350: determining a priority coefficient of the UE, and sequencing the UE of which all service types are delay insensitive services according to the priority coefficient;
step S360: and combining the queues according to the condition that the admission priority of the delay sensitive service is higher than that of the delay insensitive service, and deciding the accessible UE according to the condition of the residual resources of the target cell.
The service of the UE refers to the current service of the UE. In addition, there may be more than one current service of the UE, and if the UE currently has multiple services, the priority coefficient of the service of the UE refers to the priority coefficient of the current highest priority service of the UE.
The priority coefficient is used to indicate the priority of the traffic. Optionally, the smaller the value of the priority coefficient is, the higher the priority of the indicated service is, or the larger the value of the priority coefficient is, the higher the priority of the indicated service is. The embodiment of the present invention is not limited, and the following description will be given by taking an example that the smaller the value of the priority coefficient is, the higher the priority of the indicated service is. The range of the service priority can be set as required.
Similarly, the target AN apparatus may obtain the priority coefficient of the service from the source AN apparatus, and the priority coefficient may be carried in the request message of step S220 above, or may be sent to the target AN apparatus independently of the request message.
Therefore, the method realizes the control of the low time delay of the time delay sensitive service flow, and particularly in satellite communication, the time delay factor is considered to be the access control, so that the satisfaction degree of a user can be further improved.
In step S250 or step S360, when performing resource allocation for all UEs requesting admission, resources may be reserved for the delay-sensitive service, so as to further ensure the admission of the delay-sensitive service.
The allocable resources of the current time unit of the target cell are divided into reserved resources and unreserved resources. Optionally, the reserved resources are used for admission of delay-sensitive traffic, and the unreserved resources are used for admission of delay-insensitive traffic. That is, the resources are allocated for all the UEs requesting admission whose service types are delay sensitive services in the reserved resources, and the resources are allocated for all the UEs requesting admission whose service types are delay insensitive services in the unreserved resources.
Alternatively, the delay sensitive service preferentially uses reserved resources, and uses unreserved resources when the reserved resources are insufficient; delay insensitive services can only use unreserved resources. That is, if the service type of the UE is a delay sensitive service and the reserved resource cannot meet the current allocation requirement of the UE, the resource is allocated to the UE in the unreserved resource. Thus, the admission of the delay sensitive service can be ensured to a greater extent.
Please refer to fig. 3, which is a schematic diagram illustrating a further detailed process of step S250 or step S360. As shown in fig. 3, in the second manner, the target AN device performs the following steps:
s400: reserved resources and unreserved resources of a current time unit of the target cell are determined.
The determination of the reserved resource of the current time unit can be determined according to the occupation condition of the historical time delay sensitive service resource. The method specifically comprises the following steps:
s401, determining the occupancy rates of time delay sensitive service resources of a plurality of time units before the current time unit;
s402, taking the average value of the occupancy rates of the time delay sensitive service resources of a plurality of time units as the reservation ratio of the current time unit;
s403, according to the reservation ratio, determining the reserved resource of the current time unit.
For example, the AN device may dynamically maintain a table locally, and count the occupancy rate of the delay-sensitive traffic resource in each time unit, where the occupancy rate may be AN average value of the occupancy rates of the delay-sensitive traffic resources in the previous time units.
Taking a time unit as a slot as AN example, the AN equipment counts the occupancy rate of the time delay sensitive service resource of each slot; and (2) calculating the average value of the occupancy rates of the time delay sensitive service resources in the M slots counted from the (N-M) th slot to the (N-1) th slot, and taking the average value as the reserved ratio alpha of the Nth slot. Thereby obtaining the occupancy rate table of the delay sensitive service resource as shown in table 1 below. The value of M is not limited, and can be selected according to the requirement.
Table 1 occupancy rate of delay sensitive traffic resources
The reservation ratio α can be updated according to the following formula:
where α is the reservation ratio of the Nth time unit, αnIs the occupancy rate of the delay sensitive service resource in the nth time unit.
S410: acquiring a UE requesting admission as a current UE according to the sequence of the admission priority;
s420: judging whether the service type of the current UE is a delay sensitive service;
s430: if the current service type of the UE is a time delay sensitive service, judging whether the reserved resources meet the distribution requirement;
s431: if the service type of the current UE is a time delay sensitive service and the reserved resources can meet the distribution requirement, allowing the UE to be admitted, distributing the resources to the UE and updating the reserved resources;
s432: if the service type of the current UE is a time delay sensitive service and the reserved resources cannot meet the distribution requirement, judging whether the unreserved resources meet the distribution requirement;
s433: if the service type of the current UE is a time delay sensitive service, the reserved resources cannot meet the distribution requirement, and the unreserved resources can meet the distribution requirement, the UE is allowed to be admitted, resources are distributed to the UE, and the unreserved resources are updated;
s434: if the service type of the current UE is a time delay sensitive service, the reserved resources cannot meet the distribution requirement, and the unreserved resources cannot meet the distribution requirement, the UE is refused to be admitted;
s440: if the current service type of the UE is a non-delay sensitive service, judging whether non-reserved resources meet the distribution requirement;
s441: if the service type of the current UE is a non-delay sensitive service and the non-reserved resource can meet the distribution requirement, allowing the UE to be admitted, distributing the resource to the UE and updating the non-reserved resource;
s442: and if the service type of the current UE is a non-delay sensitive service and the non-reserved resources cannot meet the allocation requirement, refusing the admission of the UE.
S450: whether resources are left (at least one of reserved resources and unreserved resources is left) and whether UE requesting admission exists;
s451: if there is a surplus resource and there is a UE requesting admission, the next UE requesting admission is obtained according to the order of admission priority, and taken as the current UE, and the step S420 is skipped.
Continuing with fig. 6, assume that there are 6 UEs simultaneously applying for admission of handover for the same target AN device, and assume that the current resources of the target AN device only allow 5 UEs to admit. Wherein, the UE0 is a GBR (guaranteed bit rate) service, the priority is 1, and the PDB (packet delay budget) is 50 ms; UE1 is GBR service, the priority is 2, PDB is 100 ms; UE2 is GBR service, the priority is 3, PDB is 150 ms; UE3 is Non-GBR (guaranteed bit rate) service, priority is 4, PDB is 250 ms; UE4 is a Non-GBR service, the priority is 5, and the PDB is 150 ms; the UE5 is Non-GBR traffic with a priority of 6 and a PDB of 50 ms.
In the prior art, after admission is performed according to the priority, the admitted UEs are UE0, UE1, UE2, UE3 and UE 4. By adopting the method provided by the embodiment of the invention, if the threshold value T is 100ms, the UE0 is a delay sensitive service, the UE1 is a delay sensitive service, the UE2 is a delay insensitive service, the UE3 is a delay insensitive service, the UE4 is a delay insensitive service, and the UE5 is a delay sensitive service, then the finally admitted UE is UE0, UE1, UE5, UE2 and UE 3.
Therefore, the switching admission control method based on the embodiment ensures the low time delay of the time delay sensitive service.
Based on the same inventive concept, AN embodiment of the present invention further provides a device, which may be AN apparatus, or may also be a device located in the AN apparatus, such as a chip or a board, and is configured to execute the method executed by the target AN apparatus or the source AN apparatus in the foregoing method embodiment.
Please refer to fig. 4, which is a schematic diagram of an apparatus for UE admission according to an embodiment of the present invention. As shown in fig. 4, the apparatus is located in a target AN device, and includes a first receiving module 110, AN admission priority determining module 120, and a resource allocating module 130.
The first receiving module 110 is configured to receive a request message from a source AN device, where the request message is used to request to handover a UE to a target cell of a target AN device, and the request message includes delay parameter information of a service of the UE; the admission priority determining module 120 is configured to determine a service type of the UE according to the delay parameter information, and determine an admission priority of the UE in the target cell according to the service type of the UE, where the service type includes a delay-sensitive service and a delay-insensitive service, and the admission priority of the delay-sensitive service is higher than that of the delay-insensitive service; a resource allocation module 130, configured to perform resource allocation on the UE requesting admission in the target cell according to the order of admission priorities, so that the UE capable of obtaining resources can be admitted.
Optionally, the admission priority determining module 120 is further configured to obtain a priority coefficient of a service of the UE; and determining the admission priority of the UE in the target cell according to the service type and the priority coefficient of the UE, wherein the admission priority of the UE in all the UE which requests admission and has the same service type as the UE is determined according to the priority coefficient.
Further, the apparatus may also include a resource determination module 140. A resource determining module 140, configured to determine reserved resources and unreserved resources of a current time unit of the target cell. Optionally, the resource determining module 140 is further configured to determine occupancy rates of the delay-sensitive traffic resources of a plurality of time units before the current time unit; taking the average value of the occupancy rates of the time delay sensitive service resources of a plurality of time units as the reservation ratio of the current time unit; and determining the reserved resources of the current time unit according to the reservation ratio.
In one implementation, the resource allocation module 130 is further configured to allocate a resource to the UE in the reserved resource if the service type of the UE is a delay sensitive service; and if the service type of the UE is the delay insensitive service, allocating resources to the UE in the unreserved resources. In another implementation, the resource allocation module 130 is further configured to preferentially allocate resources to the UE in the reserved resources if the service type of the UE is a delay sensitive service; if the service type of the UE is a time delay sensitive service and the reserved resources cannot meet the current allocation requirement of the UE, allocating resources for the UE in the unreserved resources; and if the service type of the UE is the delay insensitive service, allocating resources to the UE in the unreserved resources.
For another example, please refer to fig. 5, which is a schematic diagram of an apparatus for UE handover according to an embodiment of the present invention. As shown in fig. 5, the apparatus is located at a source AN device and includes a determining module 210, a transmitting module 220, and a second receiving module 230.
The determining module 210 is configured to determine a target cell for handover of the UE to the target AN device; the sending module 220 is configured to send a request message to a target AN device, where the request message is used to request that a UE is switched to a target cell, where the request message includes delay parameter information of a service of the UE, and the delay parameter information of the service is used to indicate a service type of the UE, where the service type of the UE is used to determine AN admission priority of the UE in the target cell, and the service type includes a delay-sensitive service and a delay-insensitive service, and AN admission priority of the delay-sensitive service is higher than that of the delay-insensitive service; the second receiving module 230 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 module 220 is further configured to send a priority coefficient of the service of the UE to the target AN device, where the priority coefficient and the delay parameter information are used to determine AN admission priority of the UE in the target cell.
The division of each unit of the above communication device is only a logical division, and the actual implementation may be wholly or partially integrated into one physical entity, or may be physically separated. And these units can be realized in the form of software called by processor; or may be implemented entirely in hardware; and part of the units can be realized in the form of calling by a processor through software, and part of the units can be realized in the form of hardware.
For example, the functions of the above units may be stored in a memory in the form of program codes, which are scheduled by a processor to implement the functions of the above units. The Processing element may be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling programs. As another example, the above units may be one or more integrated circuits configured to implement the above methods, such as: 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 above two methods, part of the functions is implemented in the form of a scheduler code of the processor, and part of the functions is implemented in the form of a hardware integrated circuit. And when the above functions are integrated together, the functions can be realized in the form of a system-on-a-chip (SOC).
It should be noted that the embodiment of the user equipment admission apparatus provided by the present invention and the embodiment of the user equipment admission method provided by the foregoing are all based on the same inventive concept, and can obtain the same technical effect; thus, other specific contents of the embodiment of the user equipment admission device can refer to the description of the foregoing embodiment of the user equipment admission method.
The embodiment of the user equipment switching device provided by the invention and the embodiment of the user equipment switching method provided by the invention are both based on the same inventive concept, and the same technical effects can be obtained. Therefore, other specific contents of the embodiment of the ue switching apparatus may refer to the description of the embodiment of the ue switching method.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.