CN107682884B - Maintenance method and device of air interface wireless link - Google Patents
Maintenance method and device of air interface wireless link Download PDFInfo
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- CN107682884B CN107682884B CN201610624476.1A CN201610624476A CN107682884B CN 107682884 B CN107682884 B CN 107682884B CN 201610624476 A CN201610624476 A CN 201610624476A CN 107682884 B CN107682884 B CN 107682884B
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- H04W24/04—Arrangements for maintaining operational condition
Abstract
The invention provides a maintenance method and a device of an air interface wireless link, wherein the method comprises the following steps: the network side equipment establishes an air interface wireless link list for each online user terminal of the cell, wherein the air interface wireless link list is used for recording air interface wireless links to be monitored; the network side equipment monitors the state of an air interface wireless link to be monitored corresponding to the on-line user terminal according to the air interface wireless link table; and under the condition that the air interface wireless link to be monitored is monitored to be abnormal, the network side equipment maintains the air interface wireless link to be monitored in an abnormal state to be in a normal state. The invention solves the problem that the terminal needs to identify itself and then the network side equipment can execute the reestablishment passively when the air interface wireless link is abnormal in the related technology, and achieves the effect of maintaining the air interface wireless link quickly and efficiently.
Description
Technical Field
The invention relates to the field of communication, in particular to a maintenance method and a maintenance device for an air interface wireless link.
Background
With the large-scale popularization of fourth-generation cellular communication networks, the number of mobile internet users and penetration rate have rapidly increased. Under the large trend of gradual reduction of mobile data traffic charges, user data traffic borne by a cellular network shows explosive growth. When the network is busy, the number of the users on line in each cell can reach hundreds of levels; this requires that the network side device side can maintain the air interface wireless link states of a large number of networking users quickly and efficiently, thereby ensuring good data service perception of each user.
The traditional maintenance mechanism of the air interface wireless link state focuses on the terminal side and is mainly completed by depending on the periodic detection of the terminal side on the air interface wireless link state. Only when the terminal identifies that the air interface wireless link index is abnormal and triggers a wireless link failure mechanism, a more appropriate cellular cell is selected, and then the reestablishment (recovery) process of the air interface wireless link is initiated to the new cell again. The traditional air interface wireless link maintenance mechanism has the obvious defects that: the air interface wireless link states of the cellular network and the terminal cannot be synchronized in real time, the network side cannot timely identify the terminal which is disconnected and leaves the current cell, and the current cell can only discover that the terminal is disconnected when the core network actively releases the S1AP link of the current user due to the fact that the terminal is accessed in other cells again, and then the static physical channel resource allocated to the disconnected user can be passively released.
In view of the above problems in the related art, no effective solution exists at present.
Disclosure of Invention
The embodiment of the invention provides a maintenance method and a maintenance device for an air interface wireless link, which are used for at least solving the problem that when the air interface wireless link is abnormal in the related art, a terminal needs to identify the terminal and then can be passively reestablished by network side equipment.
According to an aspect of the present invention, a method for maintaining an air interface wireless link is provided, including: the method comprises the steps that network side equipment establishes an air interface wireless link table for each online user terminal of a cell to which the network side equipment belongs, wherein the air interface wireless link table is used for recording air interface wireless links to be monitored; the network side equipment monitors the state of an air interface wireless link to be monitored corresponding to the online user terminal according to the air interface wireless link table; and under the condition that the air interface wireless link to be monitored is monitored to be abnormal, the network side equipment maintains the air interface wireless link to be monitored in an abnormal state to be in a normal state.
Further, the establishing, by the network side device, an air interface wireless link table for each online user terminal of the cell includes: after a user terminal is newly accessed or switched to a cell to which the network side equipment belongs to successfully become an online user terminal, the network side equipment determines that a first link and a second link are the air interface wireless links to be monitored, wherein the first link is an entity air interface wireless link, and the second link is a logic air interface wireless link used for parasitizing the first link; the network side device configures link parameters of the second link, wherein the link parameters at least include: a life value, a reward and punishment factor; and the network side equipment establishes the air interface wireless link list according to the first link, the corresponding link parameters and the second link.
Further, the monitoring, by the network side device, the state of the air interface wireless link to be monitored corresponding to the online user terminal according to the air interface wireless link table includes: the network side equipment judges whether a first link in an air interface wireless link table corresponding to the online user is in an active state; if the judgment result is yes, the network side equipment compares the wireless index of the first link in the active state with a preset threshold value; and the network side equipment adjusts the life value of the first link in the active state according to the comparison result and the reward and punishment factors, and monitors the adjusted life value.
Further, the adjusting, by the network-side device, the life value of the first link in the active state according to the comparison result and the reward and punishment factor includes: when the wireless index is larger than or equal to the preset threshold value, the network side equipment increases the life value of the first link in an active state according to the reward and punishment factor; and when the wireless index is smaller than the preset threshold value, the network side equipment reduces the life value of the first link in an active state according to the reward and punishment factor.
Further, if the determination result is negative, the network side device parasitizes the second link on the first link in the silent state, and triggers the second link to send a detection packet on the first link; and the network side equipment monitors the first link according to the condition of receiving and sending the detection message.
Further, the condition that the air interface wireless link to be monitored is abnormal includes: and the life value of the first link is exhausted, and the network side equipment receives and transmits the detection message abnormally.
Further, the maintaining, by the network side device, the air interface wireless link to be monitored in the abnormal state to the normal state includes: the network side equipment adopts a recovery mechanism for the first link; and under the condition that the first link is recovered unsuccessfully, the network side equipment migrates the online user terminal to other network side equipment, or releases the online user terminal.
Further, the network side device prohibits the second link from parasitizing the first link when the first link is transitioned from the silent state to the active state.
According to another aspect of the present invention, there is provided a maintenance apparatus for an air interface wireless link, which is applied to a network side device side, and includes: the system comprises an establishing module, a monitoring module and a monitoring module, wherein the establishing module is used for establishing an air interface wireless link table for each online user terminal of a cell of network side equipment, and the air interface wireless link table is used for recording an air interface wireless link to be monitored; a monitoring module, configured to monitor a state of an air interface wireless link to be monitored, corresponding to the online user terminal, according to the air interface wireless link table; and the maintenance module is used for maintaining the air interface wireless link to be monitored in an abnormal state to a normal state in time under the condition that the air interface wireless link to be monitored is monitored to be abnormal.
Further, the establishing module comprises: a determining unit, configured to determine, after a user terminal is newly accessed or switched to a cell to which the network side device belongs and successfully becomes an online user terminal, that a first link and a second link are the air interface wireless links to be monitored, where the first link is an entity air interface wireless link, and the second link is a logical air interface wireless link used for parasitizing on the first link; a configuration unit, configured to configure link parameters of the second link, where the link parameters at least include: a life value, a reward and punishment factor; and the establishing unit is used for establishing the air interface wireless link list according to the first link, the corresponding link parameter and the second link.
Further, the monitoring module includes: a judging unit, configured to judge whether a first link in an air interface wireless link table corresponding to the online user is in an active state; the comparison unit is used for comparing the wireless index of the first link in the active state with a preset threshold value under the condition that the judgment result is yes;
and the first monitoring unit is used for adjusting the life value of the first link in the active state according to the comparison result and the reward and punishment factor and monitoring the adjusted life value.
Further, the first monitoring unit includes: the increasing subunit is configured to increase, according to the reward and punishment factor, a life value of the first link in an active state when the wireless indicator is greater than or equal to the preset threshold value; and the reduction subunit is configured to reduce the life value of the first link in the active state according to the reward and punishment factor when the wireless indicator is smaller than the preset threshold value.
Further, the monitoring module further comprises: the processing unit is used for parasitizing the second link on the first link in the silent state and triggering the second link to send a detection message on the first link under the condition that the judgment result is negative; and the second monitoring unit is used for monitoring the first link according to the condition of receiving and sending the detection message.
Further, the condition that the air interface wireless link to be monitored is abnormal includes: and the life value of the first link is exhausted, and the second monitoring unit receives and transmits the detection message abnormally.
Further, the maintenance module includes: a first maintenance unit, configured to use a recovery mechanism for the first link; and the second maintenance unit is used for migrating the online user terminal to other network side equipment or releasing the online user terminal under the condition that the first link is recovered unsuccessfully.
Further, the apparatus further comprises: a prohibition module configured to prohibit the second link from parasitizing the first link if the first link transitions from a silent state to an active state.
According to the invention, the air interface wireless link table for recording the air interface wireless link to be monitored is established in the network side equipment, and the network side equipment can maintain the air interface wireless link to be monitored in an abnormal state to a normal state when monitoring that the air interface wireless link to be monitored is abnormal by monitoring the air interface wireless link to be monitored in the air interface wireless link table; namely, the network side device can timely maintain the abnormal air interface wireless link, so that the problem that the terminal needs to identify itself first and then the network side device can passively perform reestablishment when the air interface wireless link is abnormal in the related technology is solved, and the effect of quickly and efficiently maintaining the air interface wireless link is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a block diagram of a hardware structure of a base station of a method for maintaining a wireless air interface link according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for maintaining a wireless air interface link according to an embodiment of the present invention;
fig. 3 is a block diagram of a maintenance apparatus for an air interface wireless link according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Example 1
The method provided by the first embodiment of the present application may be executed in a device of a network architecture. Taking an operation on a base station as an example, fig. 1 is a block diagram of a hardware structure of a base station of a method for maintaining a wireless air interface link according to an embodiment of the present invention. As shown in fig. 1, the base station 10 may include one or more (only one shown) processors 102 (the processors 102 may include, but are not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA, etc.), a memory 104 for storing data, and a transmission device 106 for communication functions. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration and is not intended to limit the structure of the electronic device. For example, the base station 10 may also include more or fewer components than shown in fig. 1, or have a different configuration than shown in fig. 1.
The memory 104 may be configured to store software programs and modules of application software, such as program instructions/modules corresponding to the maintenance method of the wireless air interface link in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the software programs and modules stored in the memory 104, so as to implement the above-mentioned method. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory remotely located from the processor 102, which may be connected to the base station 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the base station 10. In one example, the transmission device 106 includes a Network adapter (NIC), which can be connected to other Network side devices through a base station so as to communicate with the internet. In one example, the transmission device 106 can be a Radio Frequency (RF) module, which is used to communicate with the internet in a wireless manner.
In this embodiment, a method for maintaining a wireless air interface link operating in a network architecture is provided, and fig. 2 is a flowchart of a method for maintaining a wireless air interface link according to an embodiment of the present invention, where as shown in fig. 2, the flowchart includes the following steps:
step S202: the network side equipment establishes an air interface wireless link list for each online user terminal of the cell, wherein the air interface wireless link list is used for recording air interface wireless links to be monitored;
step S204: the network side equipment monitors the state of an air interface wireless link to be monitored corresponding to the on-line user terminal according to the air interface wireless link table;
step S206: and under the condition that the air interface wireless link to be monitored is monitored to be abnormal, the network side equipment maintains the air interface wireless link to be monitored in an abnormal state to be in a normal state.
As can be seen from steps S202 to S206, an air interface wireless link table for recording air interface wireless links to be monitored is established in the network side device, and the network side device monitors the air interface wireless links to be monitored in the air interface wireless link table, so that when it is monitored that the air interface wireless links to be monitored are abnormal, the network side device can maintain the air interface wireless links to be monitored, which are in an abnormal state, to be in a normal state; namely, the network side device can timely maintain the abnormal air interface wireless link, so that the problem that the terminal needs to identify itself first and then the network side device can passively perform reestablishment when the air interface wireless link is abnormal in the related technology is solved, and the effect of quickly and efficiently maintaining the air interface wireless link is achieved.
It should be noted that the network side device in this embodiment is preferably a base station, and other network side devices capable of implementing this method are also within the scope of the present invention.
In an optional implementation manner of this embodiment, as to the manner in which the network side device establishes the air interface radio link table for each online user terminal of the cell in step S202 in this embodiment, the method may be:
step S202-1: after a user terminal is newly accessed or switched to a cell to which network side equipment belongs to successfully become an online user terminal, the network side equipment determines a first link and a second link as air interface wireless links to be monitored, wherein the first link is an entity air interface wireless link, and the second link is a logic air interface wireless link used for parasitizing the first link;
step S202-2: the network side equipment configures link parameters of a second link, wherein the link parameters at least comprise: a life value, a reward and punishment factor;
in a specific application scenario, the reward punishment factor may include: a reward factor and a penalty factor.
Step S202-3: and the network side equipment establishes an air interface wireless link table according to the first link, the corresponding link parameters and the second link.
As can be seen from the foregoing steps S202-1 to S202-3, the air interface radio links to be monitored in the air interface radio link table related in this embodiment include two types, one type is an entity air interface radio link, and the other type is a logical air interface radio link.
Based on this, in a specific application scenario of this embodiment, the first radio link at least includes: the normal service link, optionally, may also include a signaling link and a voice link; that is, the ordinary service link is the object that must be monitored, and the signaling link and the voice link may be monitored or not monitored in advance. The second link may be a watchdog link in a specific application scenario, where the watchdog link is a logical link automatically generated by the system, and the logical link is hosted on a wireless link of some air interface entity.
Based on the first link and the second link, in another optional implementation manner of this embodiment, the manner in which the network side device in step S204 monitors the state of the air interface wireless link to be monitored corresponding to the online user terminal according to the air interface wireless link table may be:
step S204-1: the network side equipment judges whether a first link in an air interface wireless link table corresponding to the online user is in an active state;
step S204-2: if the judgment result is yes, the network side equipment compares the wireless index of the first link in the active state with a preset threshold value;
step S204-3: and the network side equipment adjusts the life value of the first link in the active state according to the comparison result and the reward and punishment factors, and monitors the adjusted life value.
The method for adjusting the vital value comprises the following steps: under the condition that the wireless index is larger than or equal to a preset threshold value, the network side equipment increases the life value of the first link in an active state according to the reward punishment factor; and under the condition that the wireless index is smaller than a preset threshold value, the network side equipment reduces the life value of the first link in the active state according to the reward and punishment factor.
From the above S204-1 to S204-3, the first link in the active state is adjusted by comparing the wireless indicator of the first link with a preset threshold value, and monitors the adjusted life value, wherein the wireless indicator may be an error rate in the preferred embodiment of the present embodiment; based on this, in a specific application scenario of this embodiment, when the error rate of the common service air interface wireless link is lower than a set threshold, it may be determined that the link currently belongs to a poor quality link, and a corresponding preset life value needs to be reduced (a specific reduction amount is based on a penalty factor set by a background). Otherwise, when the error rate of the common service air interface wireless link is not lower than the preset threshold value, it is determined that the link currently belongs to a link with good quality, and the corresponding preset life value needs to be increased (the specific increase amount is based on the reward factor set by the background), but the life value does not exceed the maximum value set by the system.
For the judgment operation in the step S204-1, if the judgment result is negative, the network side device parasitizes the second link on the first link in the silent state, and triggers the second link to send the detection packet on the first link; and the network side equipment monitors the first link according to the condition of receiving and sending the detection message.
That is, this method is used to improve the method for monitoring the air interface wireless link in steps S204-2 and S204-3, because when the air interface wireless link is silent, the monitoring mechanism in steps S204-2 and S204-3 fails, and another method is needed to assist.
It should be noted that the characteristics of the detection packet in this embodiment include: (1) the message scheduling granularity is the minimum value of the resource allocation granularity of the air interface service channel; (2) the message scheduling code rate is consistent with the code rate of the current community public scheduling; (3) the message scheduling presents obvious periodic characteristics; (4) the content of the message scheduling is redundant data (padding). In addition, when detecting that the real air interface link of the current user is in an active state, the corresponding watchdog link is timely deactivated, that is, the network side device prohibits the second link from being parasitic on the first link under the condition that the first link is converted from a silent state to an active state.
Based on the two situations that the first link is in the active state or the silent state, the situations related to the occurrence of the abnormality of the air interface wireless link to be monitored in this embodiment include: the life value of the first link is exhausted, and the network side equipment receives and transmits the detection message abnormally.
Based on the foregoing two cases of the air interface radio link being abnormal, the method for the network side device in step S206 to maintain the air interface radio link to be monitored, which has an abnormal state, to be in a normal state may be:
step S206-1: the network side equipment adopts a recovery mechanism for the first link;
for the recovery mechanism, in a specific application scenario of this embodiment, for cellular networks adopting different technical standards, air interface wireless link recovery mechanisms correspondingly supported by the cellular networks are not very same, for example, for a 4G mobile communication network, a rescue mechanism of an air interface link may adopt a non-contention access manner triggered by PDCCH Order, that is, a manner of "forcing UE to reinitiate access" is adopted to quickly recover the air interface link.
Step S206-2: under the condition that the first link is recovered unsuccessfully, the network side equipment migrates the online user terminal to other network side equipment or releases the online user terminal.
The migration or release manner may be, in a specific application scenario of this embodiment: after the recovery process of the air interface wireless link is executed, when the wireless index (error rate) of the relevant air interface wireless link still cannot be recovered to a normal value, a migration process or a release process needs to be executed on the link in time. If the current cellular network adopts multi-band networking, the current user needs to be preferentially moved to other pilot frequency carriers with the same technical standard; if the current resident cellular network is configured with an interoperation process with other different system networks, when the migration between the same-system different-frequency carriers cannot be carried out, the user can be selected to be migrated to the different system networks; if the current system does not configure the interoperation process with other heterogeneous system networks, the user needs to be subjected to the release process in time, so that the base station can timely recover the static wireless channel resources allocated to the user.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solution of the present invention essentially or contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, or a network-side device) to execute the method according to the embodiments of the present invention.
Example 2
In this embodiment, a maintenance apparatus for an air interface wireless link is further provided, and the apparatus is used to implement the foregoing embodiments and preferred embodiments, and details of which have been already described are omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware or a combination of software and hardware is also possible and contemplated.
Fig. 3 is a block diagram of a maintenance apparatus for an air interface wireless link according to an embodiment of the present invention, which is applied to a network side device side, and as shown in fig. 3, the apparatus includes: an establishing module 32, configured to establish an air interface wireless link table for each online user terminal of a cell of a network side device to which the user terminal belongs, where the air interface wireless link table is used to record an air interface wireless link to be monitored; a monitoring module 34, coupled to the establishing module 32, configured to monitor a state of an air interface wireless link to be monitored, corresponding to the online user terminal, according to the air interface wireless link table; and the maintenance module 36 is coupled to the monitoring module 34, and configured to maintain the air interface wireless link to be monitored in an abnormal state to a normal state in time when the air interface wireless link to be monitored is monitored to be abnormal.
Optionally, the establishing module 32 includes: a determining unit, configured to determine, after a user terminal is newly accessed or switched to a cell to which a network side device belongs and successfully becomes an online user terminal, that a first link and a second link are air interface wireless links to be monitored, where the first link is an entity air interface wireless link and the second link is a logical air interface wireless link used for parasitizing on the first link; a configuration unit, configured to configure a link parameter of the second link, where the link parameter at least includes: a life value, a reward and punishment factor; and the establishing unit is used for establishing an air interface wireless link table according to the first link, the corresponding link parameter and the second link.
Optionally, the monitoring module 34 includes: the judging unit is used for judging whether a first link in an air interface wireless link table corresponding to the online user is in an active state; the comparison unit is used for comparing the wireless index of the first link in the active state with a preset threshold value under the condition that the judgment result is yes; and the first monitoring unit is used for adjusting the life value of the first link in the active state according to the comparison result and the reward and punishment factor and monitoring the adjusted life value.
Wherein, this first monitoring unit includes: the increasing subunit is configured to increase, according to the reward and punishment factor, a life value of the first link in an active state when the wireless indicator is greater than or equal to a preset threshold value; and the reduction subunit is used for reducing the life value of the first link in the active state according to the reward and punishment factor under the condition that the wireless index is smaller than the preset threshold value.
Optionally, the monitoring module 34 further includes: the processing unit is used for parasitizing the second link on the first link in the silent state and triggering the second link to send the detection message on the first link under the condition that the judgment result is negative; and the second monitoring unit is used for monitoring the first link according to the condition of receiving and sending the detection message.
Optionally, in this embodiment, the condition that the radio link to be monitored is abnormal includes: the life value of the first link is exhausted, and the second monitoring unit receives and transmits the detection message abnormally.
Optionally, the maintenance module comprises: the first maintenance unit adopts a recovery mechanism for the first link; and the second maintenance unit is used for migrating the online user terminal to other network side equipment or releasing the online user terminal under the condition that the first link is recovered unsuccessfully.
Optionally, the apparatus further comprises: and the prohibiting module is used for prohibiting the second link from parasitizing the first link under the condition that the first link is converted into the active state from the silent state.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
Example 3
This embodiment is an optional implementation of the foregoing embodiment 1 and embodiment 2, and this optional embodiment provides a method for maintaining an air interface link state of a wireless communication device, where the method establishes an air interface wireless link table for each online user on a network side device side, and tracks and maintains the air interface wireless link state of each online user in time through a specific air interface detection mechanism. When the detection mechanism identifies that the empty radio link state of a certain online user has a deterioration trend, the empty radio link of the user is quickly restored to a normal level through a corresponding empty radio link restoration mechanism in time, or an abnormal user is transferred to a more appropriate cell through a cross-cell (or cross-system) transfer mechanism in time, so that the situation that the abnormal problem of the empty radio link is dragged to a state that the terminal identifies itself and then the base station passively performs reestablishment is avoided to the greatest extent.
The specific maintenance process of the air interface wireless link in this embodiment may be divided into three stages: the first stage is an air interface wireless link state initialization stage; the second stage is an air interface wireless link state tracking stage; the third stage and the recovery (or migration) stage for the air interface wireless link.
Wherein, the first stage: after the terminal enters the current cell through initial access or handover, the network side needs to establish and initialize an air interface wireless link table for the terminal.
And a second stage: after the initialization of the empty link state table of the terminal is completed, the network side device needs to execute an active detection process of the empty wireless link according to a set flow, and update a detection result into the empty wireless link table in time.
And a third stage: when the network side device identifies a trend that the state of the air interface wireless link is continuously deteriorated or finds that the state of the air interface wireless link is deteriorated, a process of restoring (or migrating) the air interface wireless link is executed in time.
The following describes the present embodiment with reference to the implementation of the specific embodiment;
in this embodiment, different service bearers established by a real online user are divided into different types of air interface links, and an air interface detection link (a watchdog link) is added; when the real service bearer is in a silent period, triggering an air interface detection message in time and sending the message on an air interface watchdog link; the link state of an air interface is further identified by monitoring the message receiving and sending performance on the watchdog link.
In addition, in the embodiment, the link detection window is automatically and elastically expanded and contracted according to the actual load condition of the network side device, so that the problems of resource overhead and device processing load in a large user limit scene do not need to be considered. In this embodiment, the processing mechanism described in this embodiment may be flexibly embedded into a processing entity of a baseband protocol stack of the communication device by a user, or may be embedded into a processing entity of a service protocol stack (media plane/signaling plane). For the convenience of the following description, an empty radio link table is defined:
table 1 user's air interface radio link table
Description of the drawings:
link Name is the Link type, and each type of air interface Link has only one Link state maintenance entity no matter how many links actually exist, namely the Link state maintenance entity corresponds to the actual type of the air interface transmission Link;
health Points is the life value of each type of air interface wireless link;
the Detect Window is the length of a detection Window in the maintenance process of each type of air interface wireless link, and the detection Window can be defined by taking the time as the granularity, and can also be defined by taking the number of received and sent messages as the granularity;
bler (ber) is the block error rate (or bit error rate) of the air interface link;
a Reward/push Factor is a Reward Factor and a penalty Factor for maintaining an air interface wireless link;
priority is a Priority parameter, and different types of air interface wireless links can be defined as different detection priorities;
the State is the current State of each type of wireless link and is divided into an active State and an inactive State.
Considering the networking structure of an actual network, the migration of air interface links mainly occurs in a system with the same cellular technology standard; the air interface radio link migration process involved in the third part of the scheme is also mainly described by a migration process in a system of the same cellular technology standard.
Based on the air interface wireless link table, the following will describe three stages of the present embodiment in detail;
firstly, an air interface wireless link state initialization stage:
the air interface wireless link maintenance entity takes a cell as a unit, and the network side equipment establishes an air interface wireless link maintenance entity for each cell. After the maintenance function of the air interface wireless link is turned on, the maintenance entity of the air interface wireless link needs to obtain each time of initial access or switching-in information of the user of the current cell from the corresponding unit of the protocol stack in real time. When each user successfully completes the initial access (or successfully completes the handover), and the corresponding service bearer is also successfully established in synchronization, the air interface radio link maintenance entity needs to create an air interface link state table for each user, and perform an initialization process on the radio link state table according to parameters preset by the system.
In addition, which types of air interface wireless links are selected as the objects of link state monitoring are determined by parameter configuration of the system side. The common service link is a necessary monitoring link; the signaling link and the voice link are optional monitoring links; the watchdog link is a logical link automatically generated by the system, and the logical link is parasitic on a certain type of air interface entity wireless link. In this embodiment, the preferred host link of the watchdog link is a normal service link, and both of the preferred host link and the normal service link exist as two necessary monitoring links in the default scenario of the system.
The life value Health Points, the detection Window length Detect Window, the Reward punishment Factor Reward/finish Factor and the detection priority of each type of link can be set individually according to the difference between the actually applied cellular systems.
Each time a new terminal is initially accessed or switched in, an initialization process of a corresponding air interface wireless link table is carried out, and a wireless link state initialization queue is formed; each time the service bearing of the initial access user or the switching-in user is successfully established, the user is hung in the wireless link state initialization queue.
II, air interface wireless link state tracking stage:
the air interface wireless link state tracking stage is set for grasping the rapid change of the air interface wireless link state of the terminal in real time. When the empty link detection entity finds that the wireless link state initialization queue is not empty, users in the wireless link state initialization queue can be transferred to the wireless link state monitoring user queue in time, and the empty link state of each user starts to be detected in real time.
After the access or the switching-in of the real user is finished, a signaling bearer and a common service bearer are generally established; for voice users, the voice bearer is also established synchronously. And the air interface link state monitoring is mainly used for monitoring the sending condition of each bearing air interface message in real time. In order to simplify the implementation complexity of the air interface link detection entity.
The state detection of the air interface link generally takes a certain air interface wireless index as a basis, and in this embodiment, the block error rate (or bit error rate) is used to measure the air interface message transceiving conditions of each link. In a set detection period of the air interface link, when the wireless index of a certain type of air interface link is lower than a set threshold value, it is determined that the link currently belongs to a poor quality link and the corresponding preset life value needs to be reduced (the specific reduction is based on a penalty coefficient set by a background). Otherwise, when the wireless index of a certain type of air interface link is not lower than the set threshold value, it is determined that the link currently belongs to a link with high quality and a corresponding preset life value needs to be increased (the specific reduction amount is based on a penalty factor set by the background), but the life value does not exceed the maximum value set by the system.
In consideration of the actual system processing load, the detection window length of the air interface link state can flexibly and timely perform elastic expansion and contraction according to the system load index and the current link state. When the air interface link index is in a stationary period, the corresponding air interface link detection window length can be extended to be N times of the set window length; and when the air interface link state is in a severe fluctuation period or the system is in a heavy load, the corresponding air interface link detection window length can be synchronously contracted to 1/N of the set window length (the parameters M and N can be set according to the actual application scene).
For the current online user, when various air interface entity links are in the service silent period, the air interface link detection mechanism fails because there is no message sending process on the air interface links. The invention specially designs a watchdog link to solve the problem of monitoring the air interface link in the scene. The watchdog air interface link mainly comprises three processes of establishment, maintenance and deletion.
(1) The establishment process of the watchdog link:
the watchdog link is synchronously established and initialized in the process of establishing the air interface link state table of the user. The watchdog link is defined as a parasitic link because the watchdog link does not correspond to a real air interface wireless link; it can be flexibly hosted on any kind of physical link. In the invention, it is hereafter agreed that the watchdog link is parasitic on the ordinary traffic link.
(2) Activation (deactivation) procedure of the watchdog link:
the watchdog link is a parasitic link that will only logically exist after the setup is completed. When monitoring finds that all entity links of the current user are in a silent period, the watchdog link is triggered to be activated. Before the watchdog link is activated, the corresponding host link is sent without a message. After the watchdog link is activated, the detection message of the air interface link is triggered according to a set period, and then the detection message is placed on the host link for sending. The air interface link detection entity maintains the air interface link state of the current user according to the receiving and sending conditions of the detection message.
Considering the precision and overhead of link state maintenance, the feature constraints of the detection message are as follows: (1) the resource granularity of message scheduling is the minimum value of the resource allocation granularity of an air interface service channel; (2) the message scheduling code rate is consistent with the code rate of the current community public scheduling; (3) the message scheduling presents obvious periodic characteristics; (4) the content of the message scheduling is redundant data (padding). When the real empty link of the current user is detected to be in an active state, the corresponding watchdog link can be timely deactivated, and the influence on the system load is avoided.
(3) Deletion process of watchdog link:
because the watchdog link is a parasitic link and does not correspond to a real air interface link, a special dismantling process is not required to be designed, and the watchdog link can be deleted along with the deletion of the host link.
Thirdly, recovering (migrating) the state exception of the air interface wireless link;
when the life values of all the air interface wireless links are exhausted, it is indicated that the current air interface wireless link is seriously degraded, and a corresponding recovery (rescue) flow needs to be started immediately to try to recover the air interface wireless link. When the wireless link rescue measures are taken without success, the current user should be forcibly migrated from the network side equipment (the different system migration or release) in time.
Considering the load situation of the actual network, in order to reduce the processing pressure on the network side equipment, when the system load exceeds a set threshold, a rescue flow can be skipped for a user who detects that the air interface link state is abnormal, and forced migration is directly initiated.
Wherein, the air interface wireless link recovery (rescue) process: for cellular networks adopting different technical standards, the corresponding supported air interface wireless link recovery mechanisms are not very same, and the invention does not make specific provisions on the relevant details. For a 4G mobile communication network, the rescue mechanism of the air interface link may adopt a non-contention access mode triggered by PDCCH Order, that is, a mode of "forcing UE to reinitiate access" is adopted to quickly recover the air interface link.
Air interface radio link release (migration) process: for those air interface wireless links whose relevant air interface basic indexes still cannot be recovered to normal after the air interface wireless link recovery process is executed, it is necessary to execute a migration process or a release process to the user to which the link belongs in time. If the current cellular network adopts multi-band networking, the current user needs to be preferentially moved to other pilot frequency carriers with the same technical standard; if the current resident cellular network is configured with an interoperation process with other different system networks, when the migration between the same-system different-frequency carriers cannot be carried out, the user can be selected to be migrated to the different system networks; if the current system does not configure the interoperation process with other different system networks, the user needs to be subjected to release process processing in time, so that the network side equipment side can timely recover the static wireless channel resources allocated to the user.
By the method of the embodiment, the cellular communication system can quickly maintain the air interface wireless link states of a large number of online users; based on a new empty radio link state detection mechanism designed on the network side equipment side, the network side equipment side can track the latest state of the empty radio link of each user accessed into the current network side equipment in time, and powerful guarantee is provided for the network side equipment to maintain the empty radio link state of a large number of online users quickly and efficiently. The method introduces a novel air interface detection message on the basis of multiplexing a real user air interface service message sending link; when the service link of the real user is in the silent period, the latest state of the air interface wireless link is tracked in time through the air interface detection message triggered by the network side equipment in time, so that the drop rate index of the cellular network is guaranteed to the maximum extent, and the data service perception of the user is improved.
The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:
s1: establishing an air interface wireless link list for each online user terminal of the cell, wherein the air interface wireless link list is used for recording air interface wireless links to be monitored;
s2: monitoring the state of an air interface wireless link to be monitored corresponding to the on-line user terminal according to the air interface wireless link table;
s3: and maintaining the air interface wireless link to be monitored in the abnormal state to be in the normal state under the condition that the air interface wireless link to be monitored is monitored to be abnormal.
Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (14)
1. A maintenance method of an air interface wireless link is characterized by comprising the following steps:
the method comprises the steps that network side equipment establishes an air interface wireless link table for each online user terminal of a cell to which the network side equipment belongs, wherein the air interface wireless link table is used for recording air interface wireless links to be monitored;
the network side equipment monitors the state of an air interface wireless link to be monitored corresponding to the online user terminal according to the air interface wireless link table;
under the condition that the air interface wireless link to be monitored is monitored to be abnormal, the network side equipment maintains the air interface wireless link to be monitored in an abnormal state to be in a normal state;
the method for establishing the air interface wireless link list for each online user terminal of the cell includes:
after a user terminal is newly accessed or switched to a cell to which the network side equipment belongs to successfully become an online user terminal, the network side equipment determines that a first link and a second link are the air interface wireless links to be monitored, wherein the first link is an entity air interface wireless link, and the second link is a logic air interface wireless link used for parasitizing the first link;
the network side device configures link parameters of the second link, wherein the link parameters at least include: a life value, a reward and punishment factor;
and the network side equipment establishes the air interface wireless link list according to the first link, the corresponding link parameters and the second link.
2. The method according to claim 1, wherein the monitoring, by the network side device, the state of the air interface radio link to be monitored corresponding to the online user terminal according to the air interface radio link table includes:
the network side equipment judges whether a first link in an air interface wireless link table corresponding to the online user is in an active state;
if the judgment result is yes, the network side equipment compares the wireless index of the first link in the active state with a preset threshold value;
and the network side equipment adjusts the life value of the first link in the active state according to the comparison result and the reward and punishment factors, and monitors the adjusted life value.
3. The method of claim 2, wherein the adjusting, by the network-side device, the life value of the first link in the active state according to the comparison result and the reward and punishment factor comprises:
when the wireless index is larger than or equal to the preset threshold value, the network side equipment increases the life value of the first link in an active state according to the reward and punishment factor;
and when the wireless index is smaller than the preset threshold value, the network side equipment reduces the life value of the first link in an active state according to the reward and punishment factor.
4. The method of claim 2,
under the condition that the judgment result is negative, the network side equipment enables the second link to parasitize on the first link in the silent state, and triggers the second link to send a detection message on the first link;
and the network side equipment monitors the state of the first link according to the condition of receiving and sending the detection message.
5. The method according to claim 3 or 4, wherein the condition that the air interface wireless link to be monitored is abnormal comprises: and the life value of the first link is exhausted, and the network side equipment receives and transmits the detection message and is abnormal.
6. The method according to claim 5, wherein the step of maintaining, by the network side device, the air interface radio link to be monitored in the abnormal state to the normal state includes:
the network side equipment adopts a recovery mechanism for the first link;
and under the condition that the first link is recovered unsuccessfully, the network side equipment migrates the online user terminal to other network side equipment, or releases the online user terminal.
7. The method of claim 4,
and under the condition that the first link is converted from a silent state to an active state, the network side equipment forbids the second link from parasitizing the first link.
8. A maintenance device of an air interface wireless link is applied to a network side device side, and is characterized by comprising:
the system comprises an establishing module, a monitoring module and a monitoring module, wherein the establishing module is used for establishing an air interface wireless link table for each online user terminal of a cell of network side equipment, and the air interface wireless link table is used for recording an air interface wireless link to be monitored;
a monitoring module, configured to monitor a state of an air interface wireless link to be monitored, corresponding to the online user terminal, according to the air interface wireless link table;
the maintenance module is used for maintaining the air interface wireless link to be monitored in an abnormal state to a normal state under the condition that the air interface wireless link to be monitored is monitored to be abnormal;
wherein the establishing module comprises:
a determining unit, configured to determine, after a user terminal is newly accessed or switched to a cell to which the network side device belongs and successfully becomes an online user terminal, that a first link and a second link are the air interface wireless links to be monitored, where the first link is an entity air interface wireless link, and the second link is a logical air interface wireless link used for parasitizing on the first link;
a configuration unit, configured to configure link parameters of the second link, where the link parameters at least include: a life value, a reward and punishment factor;
and the establishing unit is used for establishing the air interface wireless link list according to the first link, the corresponding link parameter and the second link.
9. The apparatus of claim 8, wherein the monitoring module comprises:
a judging unit, configured to judge whether a first link in an air interface wireless link table corresponding to the online user is in an active state;
the comparison unit is used for comparing the wireless index of the first link in the active state with a preset threshold value under the condition that the judgment result is yes;
and the first monitoring unit is used for adjusting the life value of the first link in the active state according to the comparison result and the reward and punishment factor and monitoring the adjusted life value.
10. The apparatus of claim 9, wherein the first monitoring unit comprises:
the increasing subunit is configured to increase, according to the reward and punishment factor, a life value of the first link in an active state when the wireless indicator is greater than or equal to the preset threshold value;
and the reduction subunit is configured to reduce the life value of the first link in the active state according to the reward and punishment factor when the wireless indicator is smaller than the preset threshold value.
11. The apparatus of claim 9, wherein the monitoring module further comprises:
the processing unit is used for parasitizing the second link on the first link in the silent state and triggering the second link to send a detection message on the first link under the condition that the judgment result is negative;
and the second monitoring unit is used for monitoring the first link according to the condition of receiving and sending the detection message.
12. The apparatus according to claim 10 or 11, wherein the condition that the air interface wireless link to be monitored is abnormal comprises: and the life value of the first link is exhausted, and the second monitoring unit receives and transmits the detection message abnormally.
13. The apparatus of claim 12, wherein the maintenance module comprises:
a first maintenance unit, configured to use a recovery mechanism for the first link;
and the second maintenance unit is used for migrating the online user terminal to other network side equipment or releasing the online user terminal under the condition that the first link is recovered unsuccessfully.
14. The apparatus of claim 11, further comprising:
a prohibition module configured to prohibit the second link from parasitizing the first link if the first link transitions from a silent state to an active state.
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