CN108924873B - Method and equipment for determining number of downlink resource blocks of voice communication service - Google Patents
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Abstract
The embodiment of the invention provides a method and equipment for determining the number of downlink resource blocks of a voice communication service, which comprises the steps of acquiring the effective bandwidth of the voice communication service under a preset condition, wherein the preset condition is that the probability that the time delay of the voice communication service is greater than the time delay budget is equal to a preset probability value; acquiring a function of the effective capacity of the voice communication service under a preset condition along with the change of the number of pre-allocated resource blocks; and determining the number of downlink resource blocks of the voice communication service according to the effective bandwidth of the voice communication service under the preset condition and a function that the effective capacity of the voice communication service changes along with the number of the pre-allocated resource blocks. The method and the equipment determine the number of the downlink resource blocks of the voice communication service under the constraint condition of meeting the time delay budget of the voice communication service, thereby ensuring the time delay budget requirement of the voice communication service effectively in the communication process and ensuring the communication quality of the voice communication service.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a method and equipment for determining the number of downlink resource blocks of a voice communication service.
Background
Among voice communication services, volte (voice over lte) is a high definition digital voice service based on a fourth generation mobile communication network and ims (ip Multimedia subsystem). Since IMS is the core network standard architecture of the all-IP era, VoLTE is also a data domain based packet switched service. Currently, mobile operators have started to replace traditional voice services based on circuit switching with VoLTE, and meanwhile, the operators also pay attention to the problem of how to guarantee the quality of service QoS of VoLTE voice communication.
VoLTE services typically employ Semi-Persistent Scheduling (SPS), which is suitable for services with small, substantially constant size and periodicity of data packets, so that service characteristics (such as packet arrival time) of such services can be generally predicted. Conventionally, the number of downlink resource allocations is calculated based on the obtained physical layer Information, such as Channel State Information (CSI) and inter-cell interference, and an appropriate number of resource blocks is set.
According to the definition of the voice communication service and the quality of service QoS thereof in the 3GPP 23.501 standard, the delay budget of the voice service is 100ms, and the confidence level is defined as 98%. The current resource allocation method for voice services in the mobile communication system is only based on physical layer information, and cannot effectively guarantee the delay budget requirement of the voice services.
Disclosure of Invention
In order to overcome the above problems or at least partially solve the above problems, embodiments of the present invention provide a method and apparatus for determining the number of downlink resource blocks for a voice communication service.
The embodiment of the invention provides a method for determining the number of downlink resource blocks of a voice communication service, which comprises the following steps: acquiring an effective bandwidth of a voice communication service under a preset condition, wherein the preset condition is that the probability that the time delay of the voice communication service is greater than the time delay budget is equal to a preset probability value; acquiring a function of the effective capacity of the voice communication service under a preset condition along with the change of the number of pre-allocated resource blocks; and determining the number of downlink resource blocks of the voice communication service according to the effective bandwidth of the voice communication service under the preset condition and a function that the effective capacity of the voice communication service changes along with the number of the pre-allocated resource blocks.
The method for acquiring the effective bandwidth of the voice communication service under the preset condition comprises the following steps: determining a QoS critical index according to the time delay budget of the voice communication service, wherein the QoS critical index is the QoS index when the probability that the time delay of the voice communication service is greater than the time delay budget is equal to a preset probability value; and obtaining the effective bandwidth of the voice communication service under the preset condition according to the QoS critical index.
The determining the QoS critical index according to the time delay budget of the voice communication service comprises the following steps: acquiring a function of the effective bandwidth of the voice communication service changing along with the QoS index; acquiring a complementary cumulative probability density function of queuing delay according to a function that the effective bandwidth of the voice communication service changes along with the QoS index; and determining the QoS critical index according to a complementary cumulative probability density function of queuing delay.
The method for acquiring the function that the effective capacity of the voice communication service under the preset condition changes along with the number of the pre-allocated resource blocks comprises the following steps: acquiring the probability distribution of the channel quality of the voice communication service; and acquiring a function of the effective capacity of the voice communication service under the preset condition along with the change of the pre-allocated resource block number according to the probability distribution of the channel quality of the voice communication service and the QoS critical index.
The obtaining of the probability distribution of the channel quality of the voice communication service includes: receiving a channel quality indication sequence of voice communication service, wherein the channel quality indication sequence comprises a preset number of channel quality indications; and acquiring the probability distribution of the channel quality of the voice communication service according to the ratio of the repeated occurrence times of the value of the channel quality indication to the preset number.
The method for determining the number of the downlink resource blocks of the voice communication service according to the function that the effective bandwidth of the voice communication service and the effective capacity of the voice communication service under the preset condition change along with the number of the pre-allocated resource blocks comprises the following steps: acquiring a difference function, wherein the difference function is the difference between a function that the effective capacity of the voice communication service under a preset condition changes along with the number of pre-allocated resource blocks and the effective bandwidth of the voice communication service under the preset condition; determining the critical resource block number according to the difference function, so that the difference function is not less than 0 when the distributed resource block number is not less than the critical resource block number, and the difference function is less than 0 when the distributed resource block number is less than the critical resource block number; and taking the critical resource block number as the downlink resource block number of the voice communication service.
The expression of the complementary cumulative probability density function of the queuing delay is as follows:
in the above formula, DbFor the delay budget, u is the QoS index, TvIn the period of sending the voice data packet, L is the data length of the voice data packet, and epsilon is a preset probability value.
The expression of the function of the effective capacity of the voice communication service changing along with the number of the pre-allocated resource blocks under the preset condition is as follows:
in the above formula, u*Is a QoS critical index, TvFor transmitting periods of voice data packets, piIs the probability distribution of the i-th channel quality, M is the total number of classes of channel quality, GiFor the amount of data that can be transmitted per resource block under the condition of the i-th type channel quality, r is the number of pre-allocated resource blocks.
The embodiment of the invention provides equipment for determining the number of downlink resource blocks of a voice communication service, which comprises the following steps: at least one processor, at least one memory, and a communication bus; wherein: the processor and the memory complete mutual communication through a communication bus; the memory stores program instructions executable by the processor, which invokes the program instructions to perform the methods described above.
Embodiments of the present invention provide a non-transitory computer-readable storage medium storing a computer program that causes a computer to perform the above-described method.
The method and the equipment for determining the number of the downlink resource blocks of the voice communication service provided by the embodiment of the invention comprise the steps of acquiring the effective bandwidth of the voice communication service under the preset condition, wherein the preset condition is that the probability that the time delay of the voice communication service is greater than the time delay budget is equal to the preset probability value; acquiring a function of the effective capacity of the voice communication service under a preset condition along with the change of the number of pre-allocated resource blocks; and determining the number of downlink resource blocks of the voice communication service according to the effective bandwidth of the voice communication service under the preset condition and a function that the effective capacity of the voice communication service changes along with the number of the pre-allocated resource blocks. The method and the equipment determine the number of the downlink resource blocks of the voice communication service under the constraint condition of meeting the time delay budget of the voice communication service, thereby ensuring the time delay budget requirement of the voice communication service effectively in the communication process and ensuring the communication quality of the voice communication service.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for determining the number of downlink resource blocks of a voice communication service according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating that a user terminal feeds back channel quality information to a base station according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an apparatus for determining the number of downlink resource blocks of a voice communication service according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides a method for determining the number of downlink resource blocks of a voice communication service, where, referring to fig. 1, the method includes: s11, acquiring the effective bandwidth of the voice communication service under the preset condition, wherein the preset condition is that the probability that the time delay of the voice communication service is greater than the time delay budget is equal to the preset probability value; s12, acquiring a function that the effective capacity of the voice communication service changes with the number of pre-allocated resource blocks under a preset condition; s13, determining the number of the downlink resource blocks of the voice communication service according to the function that the effective bandwidth of the voice communication service under the preset condition and the effective capacity of the voice communication service change with the number of the pre-allocated resource blocks.
In particular, in a communication system, when data is transmitted through a network, packets are generally required to be input into a buffer for forwarding, thereby causing queuing delay, which is also the case in voice communication services. In order to ensure quality of service (QoS) of voice communication services, queuing delay of voice communication services needs to satisfy a certain condition in voice communication. The communication system can only provide QoS guarantee with statistical significance due to the randomness of the service and the uncertainty of the fading channel, the condition is established in the statistical significance, the probability that the time delay of the voice communication service is larger than the time delay budget is not higher than the preset probability value, and the time delay budget and the preset probability value are respectively corresponding system preset values set for the voice communication service by the communication system.
When the queuing time delay of the voice communication service needs to meet a preset condition, determining that the equipment of the number of downlink resource blocks of the voice communication service acquires the effective bandwidth of the voice communication service, wherein the preset condition is a condition that the probability that the time delay of the voice communication service is greater than the time delay budget is equal to a preset probability value, namely a critical condition that the QoS of the voice communication service can be ensured; similarly, the device for determining the number of downlink resource blocks of the voice communication service obtains a function of the effective capacity of the voice communication service under the preset condition, which is changed along with the number of pre-allocated resource blocks, under the preset condition. The effective capacity and the effective bandwidth are two parameters that measure the QoS of the communication system. The Effective Bandwidth (Effective Bandwidth) is defined as the lowest service rate of the communication system when the QoS requirement is satisfied. Effective Capacity (Effective Capacity) is defined as the maximum arrival rate of the communication system when the QoS requirement is met. The equipment for determining the number of the downlink resource blocks of the voice communication service can determine the number of the downlink resource blocks of the voice communication service by comparing the effective bandwidth of the voice communication service under the preset condition with a function that the effective capacity of the voice communication service changes along with the number of the pre-allocated resource blocks.
The embodiment determines the number of the downlink resource blocks of the voice communication service under the constraint condition of meeting the delay budget of the voice communication service, thereby ensuring the delay budget requirement of the voice communication service in the communication process effectively and ensuring the communication quality of the voice communication service.
Based on the above embodiments, obtaining the effective bandwidth of the voice communication service under the preset condition includes: determining a QoS critical index according to the time delay budget of the voice communication service, wherein the QoS critical index is the QoS index when the probability that the time delay of the voice communication service is greater than the time delay budget is equal to a preset probability value; and obtaining the effective bandwidth of the voice communication service under the preset condition according to the QoS critical index.
Specifically, because the communication system can only provide QoS guarantee in a statistical sense due to the randomness of the service and the uncertainty of the fading channel, in the statistical sense, a QoS index is introduced to represent the degree of the QoS from the critical probability. And obtaining the effective bandwidth of the voice communication service according to the QoS critical index, namely the effective bandwidth of the voice communication service under the preset condition. The embodiment can ensure that the maximum arrival rate of the communication system reaches the maximum value and can ensure that the communication resources of the communication system are more fully utilized through the effective bandwidth of the voice communication service acquired by the QoS critical index.
Based on the above embodiment, determining the QoS threshold index according to the delay budget of the voice communication service includes: acquiring a function of the effective bandwidth of the voice communication service changing along with the QoS index; acquiring a complementary cumulative probability density function of queuing delay according to a function that the effective bandwidth of the voice communication service changes along with the QoS index; and determining the QoS critical index according to a complementary cumulative probability density function of queuing delay.
The expression of the complementary cumulative probability density function of the queuing delay is as follows:
in the above formula, DbFor the delay budget, u is the QoS index, TvIn the period of sending the voice data packet, L is the data length of the voice data packet, and epsilon is a preset probability value.
Specifically, the arrival of the packets follows a poisson distribution in which the average number of arriving packets is 1 and the data length of the voice packet is L. The effective bandwidth alpha of the voice communication service(b)(u) is:
wherein u is the QoS index and L is the data length of the voice data packet.
According to the effective capacity and effective bandwidth theory, the complementary cumulative probability density function of queuing delay can be expressed as:
P(D＞Db)≈exp(-uα(b)(u)Db)≤ε；
wherein D isbAnd (4) for time delay budget, u is a QoS index, and epsilon is a preset probability value.
By combining the two equations, the final complementary cumulative probability density function for queuing delay can be expressed as:
wherein D isbFor the delay budget, u is the QoS index, TvIn the period of sending the voice data packet, L is the data length of the voice data packet, and epsilon is a preset probability value.
Under the condition that the above formula takes equal sign, that is, under the condition that the probability that the time delay of the voice communication service is greater than the time delay budget is equal to the preset probability value, a QoS critical index is obtained, and the expression is as follows:
wherein D isbFor delay budget, TvIn the period of sending the voice data packet, L is the data length of the voice data packet, and epsilon is a preset probability value.
Based on the above embodiment, obtaining a function of the effective capacity of the voice communication service under the preset condition varying with the number of pre-allocated resource blocks includes: acquiring the probability distribution of the channel quality of the voice communication service; and acquiring a function of the effective capacity of the voice communication service under the preset condition along with the change of the pre-allocated resource block number according to the probability distribution of the channel quality of the voice communication service and the QoS critical index.
The expression of the function of the effective capacity of the voice communication service changing along with the number of the pre-allocated resource blocks under the preset condition is as follows:
in the above formula, u*Is a QoS critical index, TvFor transmitting periods of voice data packets, piIs the probability distribution of the i-th channel quality, M is the total number of classes of channel quality, GiFor the amount of data that can be transmitted per resource block under the condition of the i-th type channel quality, r is the number of pre-allocated resource blocks.
Specifically, the effective capacity of the voice communication service is related to the probability distribution of the channel quality of the voice communication service, in this embodiment, the probability distribution of the channel quality of the voice communication service is first obtained, and at the same time, the data volume that each resource block can transmit under the condition of each type of channel quality is also obtained, and then, according to the probability distribution of the channel quality of the voice communication service and the QoS critical index, a function that the effective capacity of the voice communication service under a preset condition changes with the number of pre-allocated resource blocks is obtained, and the expression can be expressed as:
wherein u is*Is a QoS critical index, TvFor transmitting periods of voice data packets, piIs the probability distribution of the i-th channel quality, M is the total number of classes of channel quality, GiFor the amount of data that can be transmitted per resource block under the condition of the i-th type channel quality, r is the number of pre-allocated resource blocks.
Based on the above embodiments, obtaining the probability distribution of the channel quality of the voice communication service includes: receiving a channel quality indication sequence of voice communication service, wherein the channel quality indication sequence comprises a preset number of channel quality indications; and acquiring the probability distribution of the channel quality of the voice communication service according to the ratio of the repeated occurrence times of the value of the channel quality indication to the preset number.
Specifically, the Channel Quality Indicator (CQI) represents the quality of the current channel, and the value range is 0 to 31 corresponding to the signal-to-noise ratio of the channel. As shown in fig. 2, the channel quality indication may be obtained by the terminal equipment (UE) feeding back CQI to the Base Station (BS), and the obtained N channel quality indications q [1], q [2], … q [ N ] are used as a channel quality indication sequence, where the channel quality indication sequence is composed of values of 0 to 31, each value represents a class of channel quality, and a probability distribution of the channel quality of the voice communication service, for example, N equals 100, is obtained according to a ratio of a number of times that a value of the channel quality indication repeatedly appears to a preset number, where the number of times that a value 24 in the channel quality indication sequence appears is 10, and the probability distribution of the channel quality corresponding to the channel quality 24 is 10/100 equals 10%.
Based on the above embodiment, determining the number of downlink resource blocks of the voice communication service according to the function that the effective bandwidth of the voice communication service and the effective capacity of the voice communication service under the preset condition vary with the number of pre-allocated resource blocks includes: acquiring a difference function, wherein the difference function is the difference between a function that the effective capacity of the voice communication service under a preset condition changes along with the number of pre-allocated resource blocks and the effective bandwidth of the voice communication service under the preset condition; determining the critical resource block number according to the difference function, so that the difference function is not less than 0 when the distributed resource block number is not less than the critical resource block number, and the difference function is less than 0 when the distributed resource block number is less than the critical resource block number; and taking the critical resource block number as the downlink resource block number of the voice communication service.
Specifically, if the maximum value of the number of pre-allocated resource blocks is R, and α appears under the preset condition(b)(u*) Greater than alpha(c)(u*R), it indicates that the QoS requirement cannot be met by adjusting the number of resource blocks, so the method of this embodiment has a precondition that α is(b)(u*) Less than alpha(c)(u*,R)。
Will be alpha(c)(u*R) and α(b)(u*) Taking the difference value to obtain a difference value function, namely:
wherein u is*Is a QoS critical index, TvFor transmitting periods of voice data packets, piIs the probability distribution of the i-th channel quality, M is the total number of classes of channel quality, GiFor the amount of data that can be transmitted in the condition of i-th type channel quality for each resource block, r is the number of pre-allocated resource blocks, DbAnd epsilon is a preset probability value for the time delay budget.
Determining the critical resource block number r according to the above formula*Let F (r) be*) Not less than 0 and F (r)*-1)＜0。
And taking the critical resource block number as the downlink resource block number of the voice communication service.
In the above solving process, the positive and negative of F (r) can be judged only by judging
Whether greater than 1. Let F (r) be F (r)) By subtracting the denominator of f (r), f (r) can be written as:
wherein u is*Is a QoS critical index, TvFor transmitting periods of voice data packets, piIs the probability distribution of the i-th channel quality, M is the total number of classes of channel quality, GiFor the amount of data that can be transmitted in the condition of i-th type channel quality for each resource block, r is the number of pre-allocated resource blocks, DbFor the time delay budget, epsilon is a preset probability value, B and C are constants, and the values of B and C are as follows:
the relationship between the negativity and the positivity of F (r) and f (r) can be expressed as:
finding r*The computational complexity of the dichotomy is O (log2(R)), and the computational complexity can be greatly simplified through algorithms such as the dichotomy.
An embodiment of the present invention further provides an apparatus for determining the number of downlink resource blocks of a voice communication service, where, referring to fig. 3, the apparatus includes: at least one processor 31, at least one memory 32, and a communication bus 33; wherein: the processor 31 and the memory 32 are communicated with each other through a communication bus 33; the memory 32 stores program instructions executable by the processor 31, and the processor 31 calls the program instructions to execute the methods provided by the above method embodiments, for example, the method includes: acquiring an effective bandwidth of a voice communication service under a preset condition, wherein the preset condition is that the probability that the time delay of the voice communication service is greater than the time delay budget is equal to a preset probability value; acquiring a function of the effective capacity of the voice communication service under a preset condition along with the change of the number of pre-allocated resource blocks; and determining the number of downlink resource blocks of the voice communication service according to the effective bandwidth of the voice communication service under the preset condition and a function that the effective capacity of the voice communication service changes along with the number of the pre-allocated resource blocks.
Embodiments of the present invention also provide a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, which when executed by a computer, enable the computer to perform the methods provided by the above-mentioned method embodiments, for example, including: acquiring an effective bandwidth of a voice communication service under a preset condition, wherein the preset condition is that the probability that the time delay of the voice communication service is greater than the time delay budget is equal to a preset probability value; acquiring a function of the effective capacity of the voice communication service under a preset condition along with the change of the number of pre-allocated resource blocks; and determining the number of downlink resource blocks of the voice communication service according to the effective bandwidth of the voice communication service under the preset condition and a function that the effective capacity of the voice communication service changes along with the number of the pre-allocated resource blocks.
Embodiments of the present invention further provide a non-transitory computer-readable storage medium, where the non-transitory computer-readable storage medium stores a computer program, and the computer program enables the computer to execute the method provided by the foregoing method embodiments, for example, the method includes: acquiring an effective bandwidth of a voice communication service under a preset condition, wherein the preset condition is that the probability that the time delay of the voice communication service is greater than the time delay budget is equal to a preset probability value; acquiring a function of the effective capacity of the voice communication service under a preset condition along with the change of the number of pre-allocated resource blocks; and determining the number of downlink resource blocks of the voice communication service according to the effective bandwidth of the voice communication service under the preset condition and a function that the effective capacity of the voice communication service changes along with the number of the pre-allocated resource blocks.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to computer program instructions, where the computer program may be stored in a computer readable storage medium, and when executed, the computer program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, the description is as follows: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A method for determining the number of downlink resource blocks for a voice communication service, comprising:
acquiring an effective bandwidth of a voice communication service under a preset condition, wherein the preset condition is that the probability that the time delay of the voice communication service is greater than the time delay budget is equal to a preset probability value;
acquiring a function that the effective capacity of the voice communication service changes along with the number of pre-allocated resource blocks under the preset condition;
determining the number of downlink resource blocks of the voice communication service according to the function that the effective bandwidth of the voice communication service under the preset condition and the effective capacity of the voice communication service change along with the number of pre-allocated resource blocks;
the acquiring the effective bandwidth of the voice communication service under the preset condition comprises:
determining a QoS critical index according to the delay budget of the voice communication service, wherein the QoS critical index is the QoS index when the probability that the delay of the voice communication service is greater than the delay budget is equal to the preset probability value;
acquiring the effective bandwidth of the voice communication service under the preset condition according to the QoS critical index;
the determining the QoS threshold index according to the delay budget of the voice communication service includes:
acquiring a function of the effective bandwidth of the voice communication service changing along with the QoS index;
acquiring a complementary cumulative probability density function of queuing delay according to a function that the effective bandwidth of the voice communication service changes along with the QoS index;
determining the QoS critical index according to the complementary cumulative probability density function of the queuing delay;
determining the number of downlink resource blocks of the voice communication service according to the function that the effective bandwidth of the voice communication service and the effective capacity of the voice communication service under the preset condition change along with the number of pre-allocated resource blocks, wherein the function comprises the following steps:
acquiring a difference function, wherein the difference function is a difference between a function that the effective capacity of the voice communication service under the preset condition changes along with the number of pre-allocated resource blocks and the effective bandwidth of the voice communication service under the preset condition;
determining a critical resource block number according to the difference function, so that the difference function is not less than 0 when the allocated resource block number is not less than the critical resource block number, and the difference function is less than 0 when the allocated resource block number is less than the critical resource block number;
taking the critical resource block number as the downlink resource block number of the voice communication service;
the difference function is:
wherein alpha is(c)(u*R) and α(b)(u*) Difference is made to obtain a difference function F (r), alpha(c)(u*R) is a function of the effective capacity of the voice communication service under the preset condition along with the change of the number of pre-allocated resource blocks; alpha is alpha(b)(u*) The effective bandwidth of the voice communication service under the preset condition is obtained; u. of*Is a QoS critical index, TvFor transmitting periods of voice data packets, piIs the probability distribution of the i-th channel quality, M is the total number of classes of channel quality, GiFor the amount of data that can be transmitted in the condition of i-th type channel quality for each resource block, r is the number of pre-allocated resource blocks, DbAnd epsilon is a preset probability value for the time delay budget.
2. The method of claim 1, wherein the obtaining the function of the effective capacity of the voice communication service under the preset condition as a function of the number of pre-allocated resource blocks comprises:
acquiring the probability distribution of the channel quality of the voice communication service;
and acquiring a function of the effective capacity of the voice communication service changing along with the number of pre-allocated resource blocks under the preset condition according to the probability distribution of the channel quality of the voice communication service and the QoS critical index.
3. The method of claim 2, wherein obtaining the probability distribution of the channel quality of the voice communication service comprises:
receiving a channel quality indication sequence of the voice communication service, wherein the channel quality indication sequence comprises a preset number of channel quality indications;
and acquiring the probability distribution of the channel quality of the voice communication service according to the ratio of the repeated occurrence times of the value of the channel quality indication to the preset number.
4. The method of claim 1, wherein the complementary cumulative probability density function of queuing delay is expressed as:
wherein D isbFor the delay budget, u is the QoS index, TvIn the period of sending the voice data packet, L is the data length of the voice data packet, and epsilon is a preset probability value.
5. The method of claim 2, wherein the expression of the function of the effective capacity of the voice communication service under the preset condition as a function of the number of pre-allocated resource blocks is as follows:
wherein u is*Is a QoS critical index, TvFor transmitting periods of voice data packets, piIs the probability distribution of the i-th channel quality, M is the total number of classes of channel quality, GiFor the amount of data that can be transmitted per resource block under the condition of the i-th type channel quality, r is the number of pre-allocated resource blocks.
6. An apparatus for determining a number of downlink resource blocks for a voice communication service, comprising:
at least one processor; and at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, the processor calling the program instructions to perform the method of any of claims 1 to 5.
7. A non-transitory computer-readable storage medium storing a computer program that causes a computer to perform the method according to any one of claims 1 to 5.
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