CN110166174B - Link adaptation method, device, access network equipment and storage medium - Google Patents

Link adaptation method, device, access network equipment and storage medium Download PDF

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CN110166174B
CN110166174B CN201910409382.6A CN201910409382A CN110166174B CN 110166174 B CN110166174 B CN 110166174B CN 201910409382 A CN201910409382 A CN 201910409382A CN 110166174 B CN110166174 B CN 110166174B
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mcs
error rate
target
candidate
parameters
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CN110166174A (en
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张琼
徐慧俊
王鑫芯
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Comba Network Systems Co Ltd
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Comba Telecom Systems China Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0226—Traffic management, e.g. flow control or congestion control based on location or mobility
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions

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

Abstract

The application relates to a link adaptation method, a device, an access network device and a storage medium. The link self-adaptive method comprises the following steps: confirming a first candidate MCS according to the target error rate; and traversing the target MCS with the index value larger than the first candidate MCS, acquiring the transmission error rate of each target MCS, and confirming the target MCS with the transmission error rate falling into the error rate range as the second candidate MCS. And acquiring transmission parameters corresponding to the candidate MCS, and confirming the MCS of the link from the candidate MCS based on the system performance index requirement and the transmission parameters. Based on the method, the selection of the link MCS is not limited to the limitation of the target error rate, and the system throughput and the user perception can be improved; meanwhile, according to the requirement of system performance indexes, combining system throughput and time delay corresponding to different MCS, selecting the MCS meeting the requirement within a certain range exceeding the target error rate, and considering both the system throughput and the time delay, so that the link performance of the system can be optimal.

Description

Link adaptation method, device, access network equipment and storage medium
Technical Field
The present application relates to the field of communications technologies, and in particular, to a link adaptation method, an apparatus, an access network device, and a storage medium.
Background
Link adaptation refers to the behavior of the system to adaptively adjust the transmission parameters of the system according to the currently acquired channel state information, so as to overcome or adapt to the influence caused by the current channel environment change. The link adaptation mainly comprises two aspects, namely the acquisition, confirmation and effective reflection of the current channel environment parameters of the channel state information; on the other hand, the adjustment of the transmission parameters includes the adjustment of parameters such as a modulation mode, a coding mode, redundant information, transmission power, time-frequency domain resources and the like.
In the conventional technique, Modulation and Coding Scheme (MCS) is generally confirmed under the condition of target bit error rate in the adjustment of the Modulation and Coding Scheme of the transmission parameter, however, in the implementation process, the inventor finds that at least the following problems exist in the conventional technique: the conventional art limits the extension of system throughput in the way of confirming MCS.
Disclosure of Invention
Based on this, it is necessary to provide a link adaptation method, apparatus, access network device and storage medium for limiting the expansion of system throughput in a manner of confirming MCS according to the conventional technology.
In order to achieve the above object, in one aspect, an embodiment of the present application provides a link adaptation method, including:
confirming the first candidate MCS according to the target error rate, and confirming the target MCS according to the first candidate MCS; wherein the index value of the target MCS is greater than the index value of the first candidate MCS.
Traversing each target MCS to obtain a transmission error rate corresponding to each target MCS, and confirming the target MCS with the transmission error rate falling into the error rate range as a second candidate MCS; the lower limit value of the error rate range is larger than or equal to the target error rate.
Acquiring transmission parameters corresponding to the first candidate MCS and each second candidate MCS, and confirming MCS of the link from the first candidate MCS and each second candidate MCS based on the system performance index requirement and each transmission parameter; wherein the transmission parameters include system throughput and latency.
In one embodiment, before the step of confirming the target MCS with the transmission error rate falling within the error rate range as the second candidate MCS, the method further comprises the steps of:
obtaining an error rate range according to the target error rate and the user characteristic parameters; the user characteristic parameters comprise any one or any combination of the following parameters: location information parameters, inherent attribute parameters, and service type parameters.
In one embodiment, the location information parameter is obtained based on the signal strength of the location where the user is located; the inherent attribute parameters are obtained based on the priority of the user; the service type parameter is obtained based on a user guaranteed rate or a minimum guaranteed rate.
Before the step of obtaining the error rate range according to the target error rate and the user characteristic parameters, the method further comprises the following steps:
and obtaining the user characteristic parameters according to the position information parameters, the weight of the position information parameters, the inherent attribute parameters, the weight of the inherent attribute parameters, the service type parameters and the weight of the service type parameters.
In one embodiment, the step of traversing each target MCS to obtain the transmission error rate corresponding to each target MCS includes:
and traversing each target MCS according to the sequence of the index values from small to large to obtain the transmission error rate corresponding to each target MCS.
In one embodiment, the system performance indicator requirement is based on a system throughput indicator and a latency indicator.
The step of determining the MCS for the link from the first candidate MCS and the second candidate MCS based on the system performance indicator requirement and the transmission parameters comprises:
and when the system performance index requirement meets the system throughput index preferentially, confirming the MCS with the maximum system throughput in the first candidate MCS and the second candidate MCS as the MCS of the link.
In one embodiment, the system performance indicator requirement is based on a system throughput indicator and a latency indicator.
The step of determining the MCS for the link from the first candidate MCS and the second candidate MCS based on the system performance indicator requirement and the transmission parameters comprises:
and when the system performance index requirement is that the delay index is preferentially met, determining the MCS with the lowest delay in the first candidate MCS and each second candidate MCS as the MCS of the link.
In one embodiment, the step of determining the MCS for the link from the first candidate MCS and the second candidate MCS based on the system performance indicator requirement and the transmission parameters comprises:
according to the preset system performance index range, the MCS of the link is confirmed from the first candidate MCS and each second candidate MCS; the preset system performance index range comprises a system throughput range and/or a time delay range.
On the other hand, an embodiment of the present application further provides a link adaptation apparatus, including:
the first MCS obtaining module is used for confirming the first candidate MCS according to the target error rate and confirming the target MCS according to the first candidate MCS; wherein the index value of the target MCS is greater than the index value of the first candidate MCS.
The target MCS traversing module is used for traversing each target MCS to obtain a transmission error rate corresponding to each target MCS, and confirming the target MCS with the transmission error rate falling into the error rate range as a second candidate MCS; the error rate range is obtained according to the target error rate.
A link MCS confirmation module, configured to obtain transmission parameters corresponding to the first candidate MCS and each second candidate MCS, and confirm MCS of the link from the first candidate MCS and each second candidate MCS based on a system performance index requirement and each transmission parameter; wherein the transmission parameters include system throughput and latency.
In one embodiment, an access network device is provided, and the access network device is used for implementing the link adaptation method.
In one embodiment, a computer storage medium is provided, on which a computer program is stored, which when executed by a processor implements the link adaptation method as described above.
One of the above technical solutions has the following advantages and beneficial effects:
confirming a first candidate MCS according to the target error rate; and traversing each target MCS with the index value larger than the first candidate MCS, acquiring the transmission error rate corresponding to each target MCS, and confirming the target MCS with the transmission error rate falling into the error rate range as the second candidate MCS. And acquiring transmission parameters corresponding to the first candidate MCS and each second candidate MCS, and confirming the MCS of the link from the first candidate MCS and each second candidate MCS based on the system performance index requirement and each transmission parameter. Based on the method, the selection of the link MCS is not limited to the limitation of the target error rate, and the system throughput and the user perception can be improved; meanwhile, according to the requirement of system performance indexes, combining system throughput and time delay corresponding to different MCS, selecting the MCS meeting the requirement within a certain range exceeding the target error rate, and considering both the system throughput and the time delay, so that the link performance of the system can be optimal.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a diagram of an exemplary link adaptation method;
FIG. 2 is a first schematic flow chart diagram of a method for link adaptation in one embodiment;
FIG. 3 is a second schematic flow chart diagram of a method for link adaptation in one embodiment;
FIG. 4 is a third schematic flow chart diagram illustrating a method for link adaptation in one embodiment;
FIG. 5 is a fourth schematic flow chart diagram illustrating a method for link adaptation in one embodiment;
FIG. 6 is a fifth schematic flow chart diagram illustrating a method for link adaptation in one embodiment;
fig. 7 is a diagram illustrating transmission parameter acquisition in a link adaptation method according to an embodiment;
fig. 8 is a schematic structural diagram of a link adaptation apparatus according to an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The acquisition of channel state information in link adaptation techniques, and the adjustment of transmission parameters, are disclosed in prior patents, but these prior arts generally determine MCS on the condition of target error rate. When the target error rate is exceeded within a certain range, the system throughput corresponding to the obtained MCS is increased, as compared with the system throughput corresponding to the MCS obtained when the target error rate is satisfied. Therefore, the system throughput can still be improved if the method is not limited to the limit of the target bit error rate. However, if the error rate exceeds the target error rate, retransmission of the data packet may be induced, thereby affecting the user plane delay. Therefore, it is very necessary to determine the modulation and coding scheme by comprehensively considering the system throughput and the time delay within a certain range exceeding the target bit error rate.
To this end, the embodiment of the present application provides a link adaptation method, which can be applied in the application environment shown in fig. 1. Wherein the access network device 102 communicates with the terminal 104 over a network. The access network device 102 may count the system throughput and the user plane delay corresponding to the MCS by determining the MCS of the terminal 104 when the target error rate is satisfied; determining the MCS with the transmission error rate falling in the range within a certain range exceeding the target error rate, and obtaining the corresponding system throughput and the corresponding user plane time delay; based on the system performance index requirement, and in combination with the transmission parameters such as system throughput and time delay, the MCS meeting the system performance index requirement is selected for the corresponding terminal 104. The access network device 102 may communicate with the corresponding terminal 104 using the MCS. It should be noted that the access network device 102 may communicate using different MCSs for different terminals 104. Based on this, the embodiment of the application can improve the system throughput, ensure the user plane time delay and meet different performance index requirements of the system.
In one embodiment, a link adaptation method is provided, as shown in fig. 2, including:
step S110, confirming a first candidate MCS according to the target error rate, and confirming a target MCS according to the first candidate MCS; wherein the index value of the target MCS is greater than the index value of the first candidate MCS.
Step S120, traversing each target MCS to obtain a transmission error rate corresponding to each target MCS, and confirming the target MCS with the transmission error rate falling into the error rate range as a second candidate MCS; the lower limit value of the error rate range is larger than or equal to the target error rate.
Step S130, acquiring transmission parameters corresponding to the first candidate MCS and each second candidate MCS, and confirming MCS of the link from the first candidate MCS and each second candidate MCS based on the system performance index requirement and each transmission parameter; wherein the transmission parameters include system throughput and latency.
Specifically, the embodiment of the present application may determine at least two candidate MCSs from all MCSs, and determine a final link MCS from the candidate MCSs according to the system performance index requirement. Specifically, a first candidate MCS meeting the target error rate may be obtained, and transmission parameters corresponding to the first candidate MCS may be counted. Based on the first candidate MCS, confirming the MCS with the index value larger than that of the first candidate MCS as a target MCS, and acquiring the transmission error rate of each target MCS; and then, the error rate range is used as a screening range, the target MCS with the transmission error rate falling in the range is confirmed as a second candidate MCS, and the transmission parameters corresponding to the second candidate MCS are obtained. And confirming the MCS with the transmission parameters meeting the requirements in each candidate MCS as the MCS of the link based on the requirement of the system performance index.
It should be noted that the target error rate may be an error rate threshold value of communication, and may be set according to an actual communication system or a communication environment, for example, the target error rate is set in a range of 0 to 1. The error rate range can be obtained according to a target error rate, specifically, the lower limit value of the error rate range is not less than the target error rate, and the upper limit value can be set according to an actual communication system or a communication environment. It should be noted that the target bit error rate may be a preset value, or may be obtained by processing according to the relevant communication requirements and parameters; the error rate range can be a value range preset based on the target error rate, and can also be obtained by processing according to the target error rate and related performance parameters. The transmission error rate may be the frequency of occurrence of errors during communication.
The candidate MCSs include at least a first candidate MCS and a second candidate MCS. The first candidate MCS is an MCS that satisfies a target error rate, and specifically, may be an MCS that satisfies the target error rate and has a largest index value; the second candidate MCS is a MCS having an index value greater than the first candidate MCS and having a transmission error rate falling within an error rate range. The second candidate MCS may be selected from the target MCS; the target MCS is an MCS with an index value greater than the first candidate MCS. The process of traversing each target MCS may be performed in the order of the index values from small to large, may also be performed in the order of the index values from large to small, and may also be performed in other orders or in random order, which is not limited herein.
The transmission parameter may be a statistical parameter of the communication performance; optionally, parameters including, but not limited to, system throughput and latency. In addition, the process of acquiring the transmission parameters of the MCS may perform synchronous statistics when acquiring the transmission error rate, perform statistics after confirming as the candidate MCS, and perform statistics before acquiring the transmission error rate, which is not limited herein. The system performance index requirement may be a communication performance requirement, and specifically, may be obtained according to index requirements such as throughput, time delay, and the like.
In the embodiment of the application, the selection of the link MCS is not limited to the limitation of the target error rate, and the system throughput and the user perception can be improved; meanwhile, according to the requirements of system performance indexes, combining system throughput and time delay corresponding to different MCS, selecting the MCS meeting the requirements within a certain range exceeding the target error rate, and considering the requirements of the system throughput, the time delay and the like, so that the link performance of the system can be optimal.
In one embodiment, as shown in fig. 3, before the step of confirming the target MCS with the transmission error rate falling within the error rate range as the second candidate MCS, the method further includes the steps of:
step S118, obtaining an error rate range according to the target error rate and the user characteristic parameters; the user characteristic parameters comprise any one or any combination of the following parameters: location information parameters, inherent attribute parameters, and service type parameters.
Specifically, on the basis of the target error rate, a corresponding error rate range can be obtained by combining at least one of the position information parameter, the inherent attribute parameter and the service type parameter. It should be noted that the user characteristic parameter may indicate the requirements of the current communication system, specifically, including but not limited to a location information parameter, an inherent attribute parameter, and a service type parameter. The location information parameter may be used to determine the location of the user, such as a central area or an edge area, and optionally, the location information parameter may be obtained based on a beacon measurement or a signal strength of the location of the user; the inherent attribute parameters may be used to determine the rank of the user, optionally, the inherent attribute parameters may be derived based on user priority or user latency requirements; the service type parameter may be used to determine the current service type or service requirement of the user, and optionally, the service type parameter may be obtained based on a user guaranteed rate or a minimum guaranteed rate.
According to the method and the device, the error rate range can be set by combining the distribution and the demand of the users in the communication system, the user demand can be considered while the system throughput is improved, the user characteristics of multiple dimensions are comprehensively considered, the user perception is improved, and the overall communication performance of the system is improved.
In one embodiment, the location information parameter is derived based on the signal strength of the location at which the user is located; the inherent attribute parameters are obtained based on the priority of the user; the service type parameter is obtained based on a user guaranteed rate or a minimum guaranteed rate.
Specifically, the location information parameter of the user can be represented by a signal strength factor of the location where the user is located; the inherent attribute parameters of the user can be represented by the priority factors of the user; the traffic type parameter may be expressed in terms of a user guaranteed rate factor and/or a minimum guaranteed rate factor.
Optionally, the value intervals of the various factors may be [0, 1 ]. The signal strength factor of the user in the center area is higher than that of the user in the edge area. In the user inherent attribute parameters, the priority factors of the users such as the VIP or the gold medal are lower than those of the common users. In the service type parameter, if the service type of the user is a GBR (Guaranteed Bit Rate) service, the service type parameter may be obtained based on a user Guaranteed Rate factor; if the service type of the user is Non-GBR service, the service type parameter can be obtained based on the minimum guaranteed rate factor. Wherein, the smaller the value of the factor is, the smaller the ratio of the allowable error rate exceeding the target error rate is.
It should be noted that the signal strength may be a signal power or a signal delay. The priority may be a scheduling priority or a resource allocation priority, etc. Aiming at GBR service, the access network equipment permanently allocates special network resources to the GBR service, and maintains the speed of the bearer, namely the user guaranteed speed, and the corresponding bit rate can be maintained even under the condition of network resource shortage; for Non-GBR traffic, the network does not provide the lowest transmission rate guarantee, which may be the requirement that the traffic needs to bear a reduced rate in case of network congestion.
The location information parameter may be a distribution ratio of the scheduled users, for example, a ratio of edge users to total scheduled users, or a ratio of center users to total scheduled users. The intrinsic attribute parameter may be a percentage of absolute priority users, for example, a percentage of gold users in the total scheduled users, or a percentage of VIP (visitors) users in the total scheduled users. The traffic type parameter may be a distribution ratio of the user traffic types, such as a ratio of a guaranteed rate of GBR traffic to a total rate, or a ratio of a guaranteed rate of Non-GBR traffic to a total rate, or a ratio of a minimum guaranteed rate to a total rate. Based on this, the embodiment of the application can comprehensively consider the user characteristics such as the distribution position, the scheduling priority and the service type of the user, and set the corresponding error rate range to improve the system throughput and the user perception.
In an embodiment, as shown in fig. 3, before the step of obtaining the error rate range according to the target error rate and the user characteristic parameter, the method further includes the steps of:
step S116, obtaining the user characteristic parameter according to the position information parameter, the weight of the position information parameter, the inherent attribute parameter, the weight of the inherent attribute parameter, the service type parameter and the weight of the service type parameter.
Specifically, considering that the influence degrees of the characteristic parameters on communication and scheduling are different, corresponding weights can be set for the position information parameter, the inherent attribute parameter, the service type parameter and the like respectively; and processing the characteristic parameters and the weights of the users to obtain final user characteristic parameters. Based on this, the embodiment of the application can further consider the influence degree of each characteristic parameter while objectively considering various characteristic parameters of the user, optimize the error rate range and improve the overall performance of the system.
In an embodiment, as shown in fig. 4, the step of traversing each target MCS to obtain the transmission error rate corresponding to each target MCS includes:
and step S122, traversing each target MCS according to the sequence of the index values from small to large to obtain the transmission error rate corresponding to each target MCS.
Specifically, the index value of the first candidate MCS is used as a basis, and the index value is sequentially increased to traverse each target MCS, so as to obtain the corresponding transmission error rate. According to the embodiment of the application, each target MCS can be traversed in the order of increasing the index value on the basis of the first candidate MCS, and the execution efficiency of traversal can be improved.
In one embodiment, the system performance indicator requirement is derived based on a system throughput indicator and a latency indicator.
Specifically, in order to give consideration to both the throughput and the time delay of the system while the throughput of the system is improved, the system performance index requirements can be obtained based on the system throughput index and the time delay index, so that the requirements in the time communication environment are considered, and the user perception is improved. The system throughput index can be preset and can also be obtained according to related communication parameters; the time delay index can be preset or obtained according to related communication parameters.
In one embodiment, as shown in FIG. 5, the step of determining the MCS for the link from the first candidate MCS and the second candidate MCS based on the system performance index requirement and the transmission parameters comprises:
step S132, when the system performance index requirement is that the system throughput index is satisfied preferentially, confirms the MCS with the maximum system throughput among the first candidate MCS and each second candidate MCS as the MCS of the link.
Specifically, if the communication environment requires that the system throughput is preferentially met, the system performance index requirement is that the system throughput index is preferentially met; in this case, the MCS with the largest system throughput among the candidate MCSs can be confirmed as the final link MCS, so that the system throughput is improved to the greatest extent within the range of the error rate, and the requirement of the system on the throughput is met.
In one embodiment, as shown in FIG. 5, the step of determining the MCS for the link from the first candidate MCS and the second candidate MCS based on the system performance index requirement and the transmission parameters comprises:
and step S134, when the system performance index requirement is that the priority meets the delay index, the MCS with the lowest delay in the first candidate MCS and the second candidate MCS is confirmed as the MCS of the link.
Specifically, if the communication environment requires that the time delay when the user plane is preferentially met, the system performance index requirement is that the time delay index is preferentially met; in this case, the MCS with the minimum time delay in the candidate MCSs can be confirmed as the final link MCS, so that the time delay is reduced to the maximum extent within the range of the error rate, and the requirement of the system on the time delay is met.
In one embodiment, as shown in FIG. 5, the step of determining the MCS for the link from the first candidate MCS and the second candidate MCS based on the system performance index requirement and the transmission parameters comprises:
step S136, according to the preset system performance index range, confirming MCS of the link from the first candidate MCS and each second candidate MCS; the preset system performance index range comprises a system throughput range and/or a time delay range.
Specifically, the system performance index requirements can be obtained according to a preset system performance index range; the predetermined system performance indicator range includes at least, but is not limited to, a system throughput range and a latency range. Optionally, the MCS conforming to the range may be selected from the candidate MCSs as the MCS of the link according to a preset system throughput range and a preset delay range, and the system throughput and the delay are taken into consideration within the error rate range.
Furthermore, the system performance index requirement can be obtained by calculating according to preset parameters such as throughput indexes, delay indexes and the like, and the most appropriate MCS can be selected from the candidate MCSs.
In one embodiment, as shown in fig. 6 and 7, the following steps one and two may be included:
the method comprises the following steps: determining MCS meeting the target error rate, and counting the system throughput and the user plane time delay at the moment; within a certain range exceeding the target error rate, sequentially increasing the MCS, and respectively determining the system throughput and the user plane time delay of the corresponding MCS; specifically, the following may be mentioned:
s101: and determining a modulation coding mode as a first modulation coding mode according to the target error rate, and obtaining the corresponding system throughput and user plane time delay. If the target error rate is A, wherein A is between 0 and 1; the determined first modulation and coding mode is a modulation and coding mode MCS1, and the obtained corresponding system throughput and user plane delay are C1 and T1, respectively;
s102: the out-of-target ber is (1+ allowed out-of-target ber ratio) × target ber. The proportion of the allowable error rate exceeding the target error rate can be determined according to the weight occupied by the user characteristics such as the position information of the user, the inherent attribute of the user, the service type of the user and the like; the user characteristics include, but are not limited to, location information of the user, inherent attributes of the user, and a service type of the user.
That is, the ratio of the allowed error rate exceeding the target error rate is α, the position information of the user + β, the user inherent attribute + γ, and the traffic type; wherein α + β + γ ═ 1; the position information of the user is the ratio of the edge user/or the central user to the total scheduling user number; the inherent attributes of the users comprise the absolute priority of the users such as VIP or gold medal and the like; the service type is the ratio of guaranteed rate or minimum guaranteed rate of GBR/Non-GBR service to total rate.
For example, if the weights occupied by the location information of the user, the inherent attribute of the user, and the service type of the user are 0.7, 0.2, and 0.1, respectively. The current user is a common user in the edge GBR service; based on the signal intensity factor, the position information parameter of the user is 0.2; based on the priority factor, the inherent attribute parameter of the user is 0.8; based on the GBR guaranteed rate factor, the traffic type parameter is 0.2. The ratio of 0.7 × 0.2+0.2 × 0.8+0.1 × 0.2 ═ 0.32 is allowed to exceed the target ber.
The range beyond the target ber is (1+0.32) a.
S103: and within a certain range exceeding the target error rate, sequentially increasing the modulation coding modes from the first modulation coding mode to obtain a second modulation coding mode, a third modulation coding mode and the like, and obtaining the system throughput and the user plane time delay corresponding to each modulation coding mode.
In the above example, when the transmission error rate is less than or equal to (1+0.32) × a, the modulation and coding schemes are sequentially incremented from MCS1 to obtain a second modulation and coding scheme MCS2, a third modulation and coding scheme MCS3, and the like, and the system throughput and the user plane delay corresponding to each modulation and coding scheme are obtained; that is, the system throughput and the user plane delay under the ith modulation and coding scheme MCSi are Ci and Ti, respectively.
Step two: and determining a final modulation coding mode according to the system performance index requirements and by combining system throughput and time delay corresponding to different modulation coding modes.
In the process of determining the final modulation coding mode, the modulation coding mode meeting the requirements of time delay and system throughput can be selected in a compromise way within a certain range exceeding the target error rate. If the system performance index requires to meet the system throughput preferentially, selecting the modulation and coding mode which enables the system throughput to be maximum as a final modulation and coding mode; and if the system performance index requirement preferentially meets the time delay, selecting the modulation coding mode with the lowest time delay as the final modulation coding mode.
In the above example, in the process of determining the final modulation and coding scheme, when the transmission error rate is less than or equal to (1+0.32) × a, the modulation and coding scheme satisfying the requirements of delay and system throughput may be selected in a compromise manner. And if the system performance index requires to meet the system throughput preferentially, selecting the corresponding modulation and coding mode as the final modulation and coding mode when max { C1, C2, C3 and … } is selected. And if the system performance index requires to meet the system throughput preferentially, selecting the corresponding modulation and coding mode at min { T1, T2, T3 and … } as the final modulation and coding mode.
That is, the embodiment of the present application may first determine the MCS when the target error rate is met, and count the system throughput and the user plane delay at this time; and when the transmission error rate exceeds the target error rate within a certain range, sequentially increasing the MCS, and respectively determining the system throughput and the user plane time delay of each MCS. Based on the method, the system throughput can be improved by increasing the MCS without being limited by the target error rate, and the user perception can be improved by comprehensively considering a plurality of different dimensions of the user characteristics. Furthermore, according to the requirements of system performance indexes, the system throughput and the time delay corresponding to different modulation coding modes are combined, the modulation coding mode meeting the requirements of the time delay and the system throughput is selected in a compromise mode within a certain range exceeding the target error rate, and the system throughput and the time delay are taken into consideration, so that the overall performance of the system is optimal.
It should be understood that although the steps in the flowcharts of fig. 2 to 6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-6 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.
In one embodiment, a link adaptation apparatus is provided, as shown in fig. 8, including:
the first MCS obtaining module is used for confirming the first candidate MCS according to the target error rate and confirming the target MCS according to the first candidate MCS; wherein the index value of the target MCS is greater than the index value of the first candidate MCS.
The target MCS traversing module is used for traversing each target MCS to obtain a transmission error rate corresponding to each target MCS, and confirming the target MCS with the transmission error rate falling into the error rate range as a second candidate MCS; the error rate range is obtained according to the target error rate.
A link MCS confirmation module, configured to obtain transmission parameters corresponding to the first candidate MCS and each second candidate MCS, and confirm MCS of the link from the first candidate MCS and each second candidate MCS based on a system performance index requirement and each transmission parameter; wherein the transmission parameters include system throughput and latency.
In one embodiment, further comprising: the error rate range acquisition module is used for acquiring an error rate range according to the target error rate and the user characteristic parameters; the user characteristic parameters comprise any one or any combination of the following parameters: location information parameters, inherent attribute parameters, and service type parameters.
In one embodiment, the location information parameter is derived based on the signal strength of the location at which the user is located; the inherent attribute parameters are obtained based on the priority of the user; the service type parameter is obtained based on a user guaranteed rate or a minimum guaranteed rate.
In one embodiment, further comprising: and the user characteristic parameter acquisition module is used for acquiring the user characteristic parameters according to the position information parameters, the weight of the position information parameters, the inherent attribute parameters, the weight of the inherent attribute parameters, the service type parameters and the weight of the service type parameters.
In one embodiment, the target MCS traversal module comprises:
and the first traversal unit is used for traversing each target MCS according to the sequence of the index values from small to large to obtain the transmission error rate corresponding to each target MCS.
In one embodiment, the system performance indicator requirement is derived based on a system throughput indicator and a latency indicator.
The link MCS confirm module includes: and a first confirming unit, configured to confirm, as the MCS of the link, the MCS with the largest system throughput from among the first candidate MCS and the second candidate MCSs when the system performance index requirement preferentially satisfies the system throughput index.
In one embodiment, the link MCS confirmation module comprises: and the second confirming unit is used for confirming the MCS with the lowest time delay in the first candidate MCS and each second candidate MCS as the MCS of the link when the system performance index requirement is that the priority meets the time delay index.
In one embodiment, the link MCS confirmation module comprises: a third confirming unit, configured to confirm the MCS of the link from the first candidate MCS and each second candidate MCS according to a preset system performance index range; the preset system performance index range comprises a system throughput range and/or a time delay range.
For specific limitations of the link adaptation apparatus, reference may be made to the above limitations of the link adaptation method, which are not described herein again. The various modules in the link adaptation apparatus described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, an access network device is provided, which may implement the following steps:
confirming the first candidate MCS according to the target error rate, and confirming the target MCS according to the first candidate MCS; wherein the index value of the target MCS is greater than the index value of the first candidate MCS.
Traversing each target MCS to obtain a transmission error rate corresponding to each target MCS, and confirming the target MCS with the transmission error rate falling into the error rate range as a second candidate MCS; the lower limit value of the error rate range is larger than or equal to the target error rate.
Acquiring transmission parameters corresponding to the first candidate MCS and each second candidate MCS, and confirming MCS of the link from the first candidate MCS and each second candidate MCS based on the system performance index requirement and each transmission parameter; wherein the transmission parameters include system throughput and latency.
In one embodiment, before the access network equipment performs the confirmation of the target MCS with the transmission error rate falling into the error rate range as the second candidate MCS, the following steps are further implemented:
obtaining an error rate range according to the target error rate and the user characteristic parameters; the user characteristic parameters comprise any one or any combination of the following parameters: location information parameters, inherent attribute parameters, and service type parameters.
In one embodiment, the location information parameter is derived based on the signal strength of the location at which the user is located; the inherent attribute parameters are obtained based on the priority of the user; the service type parameter is obtained based on a user guaranteed rate or a minimum guaranteed rate.
In an embodiment, before the access network device performs the step of obtaining the error rate range according to the target error rate and the user characteristic parameter, the following steps are further implemented:
and obtaining the user characteristic parameters according to the position information parameters, the weight of the position information parameters, the inherent attribute parameters, the weight of the inherent attribute parameters, the service type parameters and the weight of the service type parameters.
In an embodiment, when the access network device performs traversal of each target MCS to obtain a transmission error rate corresponding to each target MCS, the following steps are further implemented:
and traversing each target MCS according to the sequence of the index values from small to large to obtain the transmission error rate corresponding to each target MCS.
In one embodiment, the system performance indicator requirement is derived based on a system throughput indicator and a latency indicator.
In one embodiment, when the access network equipment performs the determination of the MCS of the link from the first candidate MCS and the second candidate MCS based on the system performance index requirement and the transmission parameters, the following steps are further implemented:
and when the system performance index requirement meets the system throughput index preferentially, confirming the MCS with the maximum system throughput in the first candidate MCS and the second candidate MCS as the MCS of the link.
In one embodiment, when the access network equipment performs the determination of the MCS of the link from the first candidate MCS and the second candidate MCS based on the system performance index requirement and the transmission parameters, the following steps are further implemented:
and when the system performance index requirement is that the delay index is preferentially met, determining the MCS with the lowest delay in the first candidate MCS and each second candidate MCS as the MCS of the link.
In one embodiment, when the access network equipment performs the determination of the MCS of the link from the first candidate MCS and the second candidate MCS based on the system performance index requirement and the transmission parameters, the following steps are further implemented:
according to the preset system performance index range, the MCS of the link is confirmed from the first candidate MCS and each second candidate MCS; the preset system performance index range comprises a system throughput range and/or a time delay range.
For specific limitations of the access network device, see the above limitations on the link adaptation method, which are not described herein again.
In one embodiment, a computer storage medium is provided, having stored thereon a computer program that, when executed by a processor, performs the steps of:
confirming the first candidate MCS according to the target error rate, and confirming the target MCS according to the first candidate MCS; wherein the index value of the target MCS is greater than the index value of the first candidate MCS.
Traversing each target MCS to obtain a transmission error rate corresponding to each target MCS, and confirming the target MCS with the transmission error rate falling into the error rate range as a second candidate MCS; the lower limit value of the error rate range is larger than or equal to the target error rate.
Acquiring transmission parameters corresponding to the first candidate MCS and each second candidate MCS, and confirming MCS of the link from the first candidate MCS and each second candidate MCS based on the system performance index requirement and each transmission parameter; wherein the transmission parameters include system throughput and latency.
In one embodiment, the computer program is further configured to, before the processor determines the target MCS with the transmission error rate falling within the error rate range as the second candidate MCS, perform the following steps:
obtaining an error rate range according to the target error rate and the user characteristic parameters; the user characteristic parameters comprise any one or any combination of the following parameters: location information parameters, inherent attribute parameters, and service type parameters.
In one embodiment, the location information parameter is derived based on the signal strength of the location at which the user is located; the inherent attribute parameters are obtained based on the priority of the user; the service type parameter is obtained based on a user guaranteed rate or a minimum guaranteed rate.
In one embodiment, the computer program is further configured to, before being executed by the processor to obtain the bit error rate range according to the target bit error rate and the user characteristic parameter, perform the following steps:
and obtaining the user characteristic parameters according to the position information parameters, the weight of the position information parameters, the inherent attribute parameters, the weight of the inherent attribute parameters, the service type parameters and the weight of the service type parameters.
In one embodiment, when the computer program is executed by the processor to traverse each target MCS to obtain the transmission error rate corresponding to each target MCS, the following steps are further implemented:
and traversing each target MCS according to the sequence of the index values from small to large to obtain the transmission error rate corresponding to each target MCS.
In one embodiment, the system performance indicator requirement is derived based on a system throughput indicator and a latency indicator.
In one embodiment, the computer program when executed by the processor to determine the MCS for the link from the first candidate MCS and the second candidate MCS based on the system performance indicator requirement and the transmission parameters further implements the steps of:
and when the system performance index requirement meets the system throughput index preferentially, confirming the MCS with the maximum system throughput in the first candidate MCS and the second candidate MCS as the MCS of the link.
In one embodiment, the computer program when executed by the processor to determine the MCS for the link from the first candidate MCS and the second candidate MCS based on the system performance indicator requirement and the transmission parameters further implements the steps of:
and when the system performance index requirement is that the delay index is preferentially met, determining the MCS with the lowest delay in the first candidate MCS and each second candidate MCS as the MCS of the link.
In one embodiment, the computer program when executed by the processor to determine the MCS for the link from the first candidate MCS and the second candidate MCS based on the system performance indicator requirement and the transmission parameters further implements the steps of:
according to the preset system performance index range, the MCS of the link is confirmed from the first candidate MCS and each second candidate MCS; the preset system performance index range comprises a system throughput range and/or a time delay range.
For the specific definition of the storage medium, reference may be made to the above definition of the link adaptation method, which is not described herein again.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims (10)

1. A method for link adaptation, comprising:
confirming a first candidate MCS according to a target error rate, and confirming a target MCS according to the first candidate MCS; wherein an index value of the target MCS is greater than an index value of the first candidate MCS;
traversing each target MCS to obtain a transmission error rate corresponding to each target MCS, and confirming the target MCS with the transmission error rate falling into an error rate range as a second candidate MCS; the lower limit value of the error rate range is greater than or equal to the target error rate;
acquiring transmission parameters corresponding to the first candidate MCS and each second candidate MCS, and confirming MCS of a link from the first candidate MCS and each second candidate MCS based on system performance index requirements and each transmission parameter; wherein the transmission parameters include system throughput and latency;
before the step of confirming the target MCS with the transmission error rate falling into the error rate range as the second candidate MCS, the method further comprises the following steps:
obtaining the error rate range according to the target error rate and the user characteristic parameters; wherein, the user characteristic parameter includes any one or any combination of the following parameters: location information parameters, inherent attribute parameters, and service type parameters.
2. The link adaptation method according to claim 1, wherein the location information parameter is obtained based on a signal strength of a location where the user is located;
the inherent attribute parameters are obtained based on the priority of the user;
the service type parameter is obtained based on a user guaranteed rate or a minimum guaranteed rate;
before the step of obtaining the error rate range according to the target error rate and the user characteristic parameter, the method further comprises the following steps:
and obtaining the user characteristic parameters according to the position information parameters, the weight of the position information parameters, the inherent attribute parameters, the weight of the inherent attribute parameters, the service type parameters and the weight of the service type parameters.
3. The link adaptation method according to claim 2, wherein the signal strength is a signal power or a signal delay.
4. The link adaptation method of claim 1, wherein the step of traversing each of the target MCSs to obtain the transmission error rate corresponding to each of the target MCSs comprises:
and traversing each target MCS according to the sequence of the index values from small to large to obtain the transmission error rate corresponding to each target MCS.
5. The link adaptation method according to any of claims 1 to 4, wherein the system performance index requirement is derived based on a system throughput index and a delay index;
the step of determining the MCS for the link from the first candidate MCS and each of the second candidate MCS based on system performance indicator requirements and each of the transmission parameters comprises:
and when the system performance index requirement meets the system throughput index preferentially, determining the MCS with the maximum system throughput in the first candidate MCS and the second candidate MCS as the MCS of the link.
6. The link adaptation method according to any of claims 1 to 4, wherein the system performance index requirement is derived based on a system throughput index and a delay index;
the step of determining the MCS for the link from the first candidate MCS and each of the second candidate MCS based on system performance indicator requirements and each of the transmission parameters comprises:
and when the system performance index requirement meets the delay index preferentially, determining the MCS with the lowest delay in the first candidate MCS and the second candidate MCS as the MCS of the link.
7. Link adaptation method according to any of claims 1 to 4,
the step of determining the MCS for the link from the first candidate MCS and each of the second candidate MCS based on system performance indicator requirements and each of the transmission parameters comprises:
confirming MCS of a link from the first candidate MCS and each second candidate MCS according to a preset system performance index range; and the preset system performance index range comprises a system throughput range and/or a time delay range.
8. A link adaptation apparatus, comprising:
the first MCS obtaining module is used for confirming a first candidate MCS according to a target error rate and confirming a target MCS according to the first candidate MCS; wherein an index value of the target MCS is greater than an index value of the first candidate MCS;
a target MCS traversing module, configured to traverse each target MCS to obtain a transmission error rate corresponding to each target MCS, and determine the target MCS with the transmission error rate falling within an error rate range as a second candidate MCS; the error rate range is obtained according to the target error rate;
before the step of confirming the target MCS with the transmission error rate falling into the error rate range as the second candidate MCS, the method further comprises the following steps:
obtaining the error rate range according to the target error rate and the user characteristic parameters; wherein, the user characteristic parameter includes any one or any combination of the following parameters: the system comprises a position information parameter, an inherent attribute parameter and a service type parameter;
a link MCS confirmation module, configured to obtain transmission parameters corresponding to the first candidate MCS and each of the second candidate MCSs, and confirm MCS of a link from the first candidate MCS and each of the second candidate MCS based on a system performance index requirement and each of the transmission parameters; wherein the transmission parameters include system throughput and latency.
9. An access network device, characterized in that the access network device is configured to implement the link adaptation method according to any one of claims 1 to 7.
10. A computer storage medium on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the link adaptation method according to any one of claims 1 to 7.
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