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Hybrid service scheduling method in LTE system

A scheduling method and technology for hybrid services, applied in electrical components, wireless communications, etc., can solve the problems of poor packet loss rate performance of QoS requirements of hybrid services, and difficulty in satisfying the scheduling algorithm, and achieve the effect of reasonable distribution.

Active Publication Date: 2018-01-26
HARBIN INST OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing scheduling algorithm is difficult to better meet the QoS requirements of mixed services and the performance of the packet loss rate is poor, and propose a mixed service scheduling method in the LTE system

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  • Hybrid service scheduling method in LTE system
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  • Hybrid service scheduling method in LTE system

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specific Embodiment approach 1

[0025] The hybrid service scheduling method in the LTE system of this embodiment, such as figure 1 As shown, in order to support the LTE system, that is, the mixed service resource scheduling in the long-term evolution system, improve the packet loss rate performance of the scheduling algorithm, and meet the service requirements, especially for services with high QoS requirements, based on the RLBS algorithm, that is, the mixed service resource scheduling Algorithm (Rate-Level-Based Scheduling) and proposed a hybrid traffic scheduling method in the LTE system. Considering that the GBR business, that is, the Guaranteed Bit Rate business (Guaranteed Bit Rate) has high requirements on data rate and packet delay, and GBR requires more resources to meet the business data rate requirements, so In the RLBS algorithm user priority formula, the information of the rate level determined by the service GBR value is introduced, so the service that requires a higher minimum transmission ra...

specific Embodiment approach 2

[0033]The difference from Embodiment 1 is that in the method for scheduling mixed services in an LTE system according to this embodiment, in step 1, according to the channel quality indicator (CQI) value reported by the user in the service list, the current time slot for each user in each physical resource is calculated. The theoretical data rate process on the block is, according to the theoretical data rate calculation formula: Calculate the theoretical data rate of each user; where N represents the number of OFDM symbols on a subframe, M represents the number of subcarriers on a physical resource block, and Q k Indicates the number of bits that can be carried by one symbol of user k, which is determined by the modulation method; Indicates the coding rate of user k on physical resource block i mapped according to the SINR value of the user according to the provisions of the LTE protocol; where SINR is the ratio of signal to interference and noise.

specific Embodiment approach 3

[0034] The difference from Embodiment 1 or Embodiment 2 is that, in the hybrid service scheduling method in the LTE system of this embodiment, the process of calculating the priority value of each user in the current time slot according to the RLBS algorithm described in step 2 is to use the priority Numerical calculation formula: Calculate the priority value of the user in the current time slot; where,

[0035] W k () represents the queue head delay of real-time service user k, τ k Indicates the delay threshold of real-time service user k, Г k (t) represents the average spectral efficiency of user k on all physical resource blocks, In the formula, N PRB Indicates the number of physical resource blocks in the system, Indicates the spectral efficiency obtained by user k on the i-th physical resource block, the spectral efficiency It is determined by the channel quality indicator CQI value reported by the user, so Г k (t) represents the channel state of the user;

[...

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Abstract

A hybrid service scheduling method in an LTE system relates to a hybrid service resource scheduling algorithm in the LTE system. It can solve the problem that the existing scheduling algorithm is difficult to better meet the QoS requirements of mixed services and the performance of the packet loss rate is poor. Calculate the theoretical data rate and average spectral efficiency of each user on each physical resource block according to the CQI value reported by the user; calculate the priority value of the user according to the RLBS algorithm; select the user with the highest priority value and assign the channel condition the best If the physical resource block is good, clear the physical resource block; judge whether the current user is a GBR service user, if so, repeat the allocation operation until the obtained theoretical data rate is greater than or equal to the TBR of the current user, and clear the current user. Repeat the selection, judgment and allocation operations until all physical resource blocks are allocated; if not, first judge whether the theoretical data rate of the current user is greater than or equal to its TBR, if so, clear it from the resource block, if not, repeat the selection, Judgment and allocation operations until all physical resource blocks are allocated. The invention is applied to the field of LTE system resource scheduling.

Description

technical field [0001] The invention relates to a mixed service scheduling method in an LTE system. Background technique [0002] The ever-increasing multimedia services require the LTE system to support services with different QoS requirements. A good resource scheduling algorithm can meet the QoS requirements of different services, and system resources can also be fully utilized. Therefore, resource scheduling algorithms play an important role in determining system performance. To the key role. The time-varying characteristics of wireless channels and the different characteristics of QoS requirements due to different types of services all determine that the resource scheduling algorithm must have strong flexibility. [0003] Early scheduling algorithms such as Proportional Fair (PF) algorithms are difficult to allocate resources for real-time services because they do not consider the QoS requirements of services. Therefore, researchers subsequently proposed many real-tim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/08H04W72/12
CPCH04W72/56H04W72/12
Inventor 吴宣利韩杏玲吴玮赵婉君
Owner HARBIN INST OF TECH
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