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WO2016000502A1 - Procédé et dispositif d'attribution de ressource, et support de stockage informatique - Google Patents

Procédé et dispositif d'attribution de ressource, et support de stockage informatique Download PDF

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Publication number
WO2016000502A1
WO2016000502A1 PCT/CN2015/079969 CN2015079969W WO2016000502A1 WO 2016000502 A1 WO2016000502 A1 WO 2016000502A1 CN 2015079969 W CN2015079969 W CN 2015079969W WO 2016000502 A1 WO2016000502 A1 WO 2016000502A1
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WIPO (PCT)
Prior art keywords
video
client
packet
user
video packet
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Ceased
Application number
PCT/CN2015/079969
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English (en)
Chinese (zh)
Inventor
左雯
鲁晓牧
王宁
贺丽君
刘贵忠
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a resource allocation method, apparatus, and computer storage medium.
  • LTE Long Term Evolution
  • embodiments of the present invention are expected to provide a resource allocation method and apparatus.
  • An embodiment of the present invention provides a resource allocation method, where the method includes:
  • the utility function for calculating the RB according to the video packet priority, the urgency parameter of the video packet, and the channel state to allocate the RB to different clients includes:
  • ⁇ k,m represents the factor affecting the urgency of the video packet
  • P k,m represents the frame number POC index of the mth video packet in the k-th user's MAC queue, Indicates the frame number of the video frame that the kth user is playing
  • B num represents the number of B frames between the I frame and the P frame
  • the nth RB is allocated to the client with the largest utility function value U(k,n).
  • the method further includes: after allocating the RB for the client with the largest utility function, the method further includes:
  • the method further includes: after determining a packet scheduling policy, the method further includes:
  • An embodiment of the present invention provides a resource allocation apparatus, where the apparatus includes:
  • the information determining unit is configured to determine play buffer status information and video play information of the client according to the feedback information of the client;
  • the urgency parameter determining unit is configured to determine an urgency parameter of the video packet of the client according to the play buffer status information and the video play information of the client;
  • the allocating unit is configured to calculate a utility function when the resource block RB is allocated to different clients according to the video packet priority level, the urgency parameter of the video packet, and the channel state, and allocate the RB for the client with the largest utility function, and according to the
  • the utility function value is used to determine a packet scheduling policy and a resource allocation strategy.
  • the allocation unit is configured to calculate an emergency parameter of the video package by: among them, ⁇ k,m represents the factor affecting the urgency of the video packet, and P k,m represents the frame number POC index of the mth video packet in the k-th user's MAC queue, Indicates the frame number of the video frame that the kth user is playing, and B num represents the number of B frames between the I frame and the P frame;
  • the nth RB is allocated to the client with the largest utility function value U(k,n).
  • the apparatus further includes: an updating unit configured to: after the allocation unit allocates an RB for the client with the largest utility function, the update unit updates the set of RBs that have been allocated to the client.
  • the device further includes: a time calculation sending unit configured to calculate a play time that can be supported by the frame selected for transmission after determining the packet scheduling policy
  • F pr represents the frame rate of the kth user video playback
  • N mac (k) represents the kth user at the time The number of frames transmitted internally
  • the embodiment of the invention further provides a computer storage medium, the storage medium comprising a set of computer executable instructions, the instructions being used to execute the resource allocation method according to the embodiment of the invention.
  • a resource allocation method, device and computer storage medium provided by embodiments of the present invention
  • the urgency of the video packet is determined by the client playback buffer state and the video playback information, and the video packet priority and channel state are considered together to determine which user to assign the RB to.
  • the time for the client to request the next segment is determined.
  • the embodiment of the present invention can improve the quality of the video received by the client and ensure the smoothness of the video playback.
  • FIG. 1 is a flowchart of a resource allocation method according to an embodiment of the present invention
  • FIG. 2 is a block diagram of a resource allocation system for a video service in an LTE system according to an embodiment of the present invention
  • FIG. 3 is a flowchart of another resource allocation method according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of performing video packet scheduling and resource allocation according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of determining a time of a request segment according to estimated MAC queue information and client cache information according to an embodiment of the present invention
  • FIG. 6 is a flowchart of performing video packet scheduling according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a resource allocation apparatus according to an embodiment of the present invention.
  • the method for allocating resources is provided to improve the video quality as much as possible to ensure the smoothness of the video playback.
  • the embodiment of the present invention provides a resource allocation method. As shown in FIG. 1 , the method mainly includes:
  • Step 101 Determine play buffer status information and video play information of the client according to the feedback information of the client.
  • Step 102 Determine, according to the play buffer status information and the video play information of the client, an urgency parameter of the video packet of the client.
  • Step 103 Calculate a utility function when resource blocks (RBs) are allocated to different clients according to a video packet priority level, an urgency parameter of the video packet, and a channel state, where the utility function is the largest guest.
  • the client allocates RBs, and determines a packet scheduling policy and a resource allocation policy according to the utility function value.
  • the embodiment of the present invention further proposes an adaptive segment request policy according to the information of the MAC queue and the state of the client play buffer, and determines the time for requesting the next segment.
  • an adaptive segment request policy according to the information of the MAC queue and the state of the client play buffer, and determines the time for requesting the next segment.
  • the urgency of the video packet is determined by the client playing the buffer state and the video playing information, and the video packet priority and the channel state are comprehensively considered to determine which user to allocate the RB to.
  • the time for the client to request the next segment is determined. Considering the above factors, the embodiment of the present invention can improve the quality of the video received by the client and ensure the smoothness of the video playback.
  • the resource allocation method of the embodiment of the present invention is further described in detail below with reference to the resource allocation system block diagram for the video service in the LTE system shown in FIG.
  • the system shown in Figure 2 has N RBs and K video users, each video user requests the same or different video sequences, and each video sequence is encoded by a video encoder to obtain a compressed H.264 code stream, each The code stream consists of multiple segments, all segments are stored on the server side, and a wired lossless connection is used with the base station.
  • the packet priority parameter obtained at the encoding end is written into the packet header and transmitted to the MAC layer, and the MAC layer estimates the information of the client buffer status and the playing status through the ACK information fed back by the client.
  • the packet scheduling policy and the resource allocation strategy are determined according to the packet priority, packet urgency, and feedback CQI information, thereby improving the overall performance of the system.
  • the time of a suitable request segment is determined based on the estimated MAC queue information and the client cache information.
  • Step 11 Initialize the parameters.
  • Step 12 predict client cache state information and discard the timed video packet.
  • a client-cached prediction model needs to be established.
  • the information ACK received by the user at the MAC layer of the base station can be used to know whether the video packet is successfully received; and then the frame rate of the video playback can be Get the playlist and cache status for each user.
  • the information of the video playback frame rate is represented by a specific flag bit in the data of the video package.
  • the base station sends a video stream with a known frame rate, such as 15f/s, 25f/s
  • the base station can estimate the user's cache status by the frame rate and the number of video packets that have been sent, the acceptance of the video packet, and the size of the client buffer. information.
  • the present invention Indicates the number of frames in the client cache of the predicted kth user (as the cache status information of the client), Indicates the frame number of the video frame that the predicted kth user is playing (as the video playback information of the client).
  • the frame number (POC) index of the mth video packet in the k-th user's MAC queue be P k,m , according to the predicted frame number of the video frame that each user is playing. Discard the timeout video packet, that is, discard the MAC address of the kth user. Video package. Indicates that the video packet of P k,m has timed out.
  • Step 13 Perform packet scheduling and resource allocation.
  • ⁇ k,m be the probability of scheduling the mth video packet of the kth user at the current time. The more urgent the video packet is, the more likely it is to schedule the video packet; that is, the value of ⁇ k,m is higher. Large, indicating that the video package is more urgent, ⁇ k, m is used to indicate the urgency of the video package.
  • the calculation of ⁇ k,m is as shown in formula (2):
  • the set of CQI values of the RBs in the set N k is CQI k
  • the highest modulation mode j * that the RBs in the set N k can support is guaranteed to ensure that the block error rate of the user k is less than 10%.
  • the total transmission capacity c k of the RBs in the set N k can be obtained by looking up the table according to the modulation coding method selected by the user k .
  • M k represents the number of video packets in the k-th user MAC queue
  • ⁇ k,m represents the video packet scheduling policy
  • R k,m represents the size of the mth video packet of the kth user
  • w k represents the empirical weight, and the value may be 1.
  • V m ( ⁇ ) indicates the state of the buffer in the remaining transmission capability evaluation system; according to the above problem, the video packet scheduling strategy can be obtained. As shown in equation (7):
  • Step 132 Calculate the utility function when assigning RBs to different users.
  • the packet scheduling policy of user k is determined. That is, it is determined that the total transmission capability of the RBs in the set N k can support the transmitted video packet set, then the total importance of these video packets is expressed as f(N k ), as shown in equation (8):
  • Step 133 Assign RBs to the user with the largest utility function value.
  • the nth RB is allocated to the user with the largest utility function value, as shown in formula (10):
  • Step 134 Determine if all RBs are allocated.
  • step 14 If all RBs are allocated, go to step 14; otherwise, go to step 131.
  • Step 14 Obtain a packet scheduling policy and a resource scheduling policy.
  • the RB condition N k (1 ⁇ k ⁇ K) assigned to each user (that is, the resource scheduling policy) and the video packet scheduling policy can be obtained.
  • the time of an appropriate request segment is determined according to the estimated MAC queue information and the client cache information, as shown in FIG. 5:
  • Step 21 Initialize the parameters.
  • the embodiment of the present invention further provides an adaptive segment request policy, and determines a suitable client according to the client cache state and the MAC queue information. The time when the segment request message was sent.
  • the frame number of the frame buffered by the kth user is N b (k)
  • the k-th user client cache estimated by the MAC layer can support continuous uninterrupted playback time. Instead of T b (k). Let T mac (k) indicate the playback time that the video packet in the MAC queue can support. Indicates the estimated transmission rate.
  • Step 22 Perform packet scheduling.
  • Step 221. Calculate the transmission capability.
  • Step 222 Obtain a packet scheduling policy.
  • the packet scheduling policy ⁇ k is obtained, that is, which packets of the kth user have been scheduled.
  • Step 223. Update the set of packets that are not scheduled.
  • RP k represents a set of packets that are not scheduled in the MAC queue of the kth user. Update the set RP k according to the packet scheduling policy ⁇ k and calculate it at time The number of frames transmitted inside N mac (k).
  • Step 23 Calculate the play time that the frame selected for transmission can support and update T mac (k).
  • Step 24 judge Whether it is greater than zero.
  • step 25 the video packet in the MAC queue still has a chance to be transmitted to the client, in order to calculate the time.
  • the number of packets that can be transmitted is performed in step 25; otherwise, the video playback of the client is interrupted, and the continuous playback time supported by the packet in the MAC queue is T mac (k), and step 26 is performed.
  • Step 25 Determine whether there are any packets in the MAC queue that are not scheduled.
  • Step 22 If there are packets in the MAC queue that are not scheduled, Go to Step 22; otherwise, go to Step 26.
  • Step 26 Calculate the time of requesting the next segment.
  • the embodiment of the present invention introduces a time interval T g (k) to ensure the continuity of the client playback. Then, the time T i (k) of requesting the next segment can be calculated, as shown in equation (15):
  • T i (k) max(T mac (k)+T b (k)+T l (k)-T g (k),0) (15)
  • T mac (k)+T b (k)+T l (k)-T g (k) ⁇ 0 it means that the total playback time supported by the frame in the client cache and the frame in the MAC queue is less than the protection time T. g (k), you need to immediately request the next segment to ensure the continuity of the user's video playback; otherwise, it means that the total playback time is greater than the protection time T g (k), you can wait for a period of time T i (k) and then request the next segment .
  • the embodiment of the present invention further provides a resource allocation device, as shown in FIG. 7, which mainly includes:
  • the information determining unit 10 is configured to determine play buffer status information and video play information of the client according to the feedback information of the client;
  • the urgency parameter determining unit 20 is configured to determine an urgency parameter of the video packet of the client according to the play buffer state information and the video play information of the client;
  • the allocating unit 30 is configured to calculate a utility function when the resource block RB is allocated to different clients according to the video packet priority level, the urgency parameter of the video packet, and the channel state, and allocate the RB to the client with the largest utility function, and according to The utility function value determines a packet scheduling policy and a resource allocation policy.
  • the allocating unit 30 is configured to calculate the urgency parameters of the video package by: among them, ⁇ k,m represents the factor affecting the urgency of the video packet, and P k,m represents the frame number POC index of the mth video packet in the k-th user's MAC queue, Indicates the frame number of the video frame that the kth user is playing, and B num represents the number of B frames between the I frame and the P frame;
  • the nth RB is allocated to the client with the largest utility function value U(k,n).
  • the apparatus further includes an update unit 40 configured to update the set of RBs that have been allocated to the client after the allocation unit 30 allocates RBs for the client with the largest utility function.
  • the apparatus further includes: a time calculation sending unit 50 configured to calculate a play time that can be supported by the frame selected for transmission after determining the packet scheduling policy
  • F pr represents the frame rate of the kth user video playback
  • N mac (k) indicates the kth user at the time The number of frames transmitted internally
  • the information determining unit 10, the urgency parameter determining unit 20, the allocating unit 30, the updating unit 40, and the time calculating transmitting unit 50 may be configured by a central processing unit (CPU) of the resource allocation device.
  • CPU central processing unit
  • a processor MPU, Micro Processing Unit
  • DSP digital signal processor
  • FPGA Field-Programmable Gate Array
  • the resource allocation apparatus of the embodiment of the present invention is applicable to the base station side, so that the embodiment of the present invention further provides a base station including the resource allocation apparatus.
  • the embodiment of the invention further provides a computer storage medium, the storage medium comprising a set of computer executable instructions, the instructions being used to execute the resource allocation method according to the embodiment of the invention.
  • the embodiment of the present invention determines the urgency of the video packet by playing the cache state and the video playing information of the client, and comprehensively considers the video packet priority and the channel state to determine which user to allocate the RB to. In addition, considering the MAC queue information and the client playback buffer status, the time for the client to request the next segment is determined. Considering the above factors, the embodiment of the present invention can improve the quality of the video received by the client and ensure the smoothness of the video playback.
  • the embodiment of the present invention considers the importance of the video packet when performing packet scheduling and resource allocation, so that the quality of the received video is improved, and the client is considered.
  • Caching information and playing information improves the smoothness of the video playback of the client; since the information of the MAC queue is taken into account when the adaptive segment request is made, the packet loss caused by the overflow of the MAC queue is avoided, and the information cached by the client is considered, so that the information cached by the client is considered.
  • System resources can be allocated to the most needed users to ensure the smoothness of client video playback.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention concerne un procédé d'attribution de ressource, comprenant les opérations suivantes : des informations d'état de cache de lecture et des informations de lecture de vidéo d'un client sont déterminées selon des informations de rétroaction du client ; un paramètre d'urgence d'un paquet vidéo du client est déterminé selon les informations d'état de cache de lecture et les informations de lecture de vidéo du client ; des fonctions de programme de service, pour le moment où un bloc de ressource (RB) est attribué à différents clients, sont calculées selon un niveau de priorité de paquet vidéo, le paramètre d'urgence du paquet vidéo et un état de canal, le RB est attribué au client ayant la fonction de programme de service la plus importante, et une politique de planification de paquet et une politique d'attribution de ressource sont déterminées selon une valeur de fonction de programme de service. L'invention concerne également un dispositif d'attribution de ressource et un support de stockage informatique.
PCT/CN2015/079969 2014-06-30 2015-05-27 Procédé et dispositif d'attribution de ressource, et support de stockage informatique Ceased WO2016000502A1 (fr)

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CN201410306816.7A CN105208461A (zh) 2014-06-30 2014-06-30 一种资源分配方法和装置

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CN111935824A (zh) * 2020-05-29 2020-11-13 洛阳师范学院 无线资源分配策略更新方法、装置、设备及存储介质

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CN114500884B (zh) * 2022-01-06 2023-12-01 杭州海康威视数字技术股份有限公司 资源单元的分配方法、装置、设备及系统

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