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Scheduling method and base station for multi-carrier system

A technology of a multi-carrier system and a scheduling method, applied in the field of communication, can solve problems such as CQI deviation and inaccurate scheduling process, and achieve the effects of improving performance, improving accuracy, and solving inaccurate scheduling.

Inactive Publication Date: 2011-12-21
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In related technologies, the scheduler uses the channel CQI fed back as the basis for scheduling priority values, but due to the untimely CQI feedback, etc., the CQI will have a large deviation from the current channel situation, resulting in inaccurate scheduling.

Method used

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  • Scheduling method and base station for multi-carrier system
  • Scheduling method and base station for multi-carrier system
  • Scheduling method and base station for multi-carrier system

Examples

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Embodiment 1

[0040] It is assumed that each user carries one type of service (when carrying multiple types of services, a priority is assigned to each type of service according to the QoS requirements of the service). The scheduling method of this embodiment fully considers the user's channel conditions, QoS and other factors, assigns a priority value to each activated carrier of the user, and then uniformly ranks each activated subcarrier of the user according to the priority value. This embodiment describes in detail the preferred configuration of the priority value based on the scheduling process, which is specifically as follows (the actual acquisition order of each item is not limited):

[0041] (1) NodeB according to the CQI fed back by the UE in a certain subcarrier i i , Get the first parameter f(CQI i ), (assuming CQI i The larger, the better the channel condition).

[0042] (2) NodeB counts the number of HARQ feedback ACK and DTX / NACK in a certain subcarrier i within a certain time wi...

Embodiment 2

[0047] image 3 It is a detailed flowchart of a scheduling method for a multi-carrier system according to Embodiment 2 of the present invention. On the basis of Embodiment 1, this embodiment describes the detailed scheduling method for a multi-carrier system according to an embodiment of the present invention. The processing process includes the following steps:

[0048] Step 301: The NodeB obtains the CQI fed back by the UE on a certain subcarrier i through the uplink feedback channel i And HARQ information. The first parameter f(CQI i )(CQI i The larger the value, the better the channel condition), the mapping function can be a table obtained by actual measurement or a certain linear or non-linear function, but all satisfy 0i )=1-1 / CQI i , Which requires CQI i >1.

[0049] Step 302: NodeB counts the number of HARQ feedback ACK and DTX / NACK in a certain time window n_harq_window of a certain subcarrier i, and calculates their ratio i =n_ack i / n_nack i . The larger the ratio, the...

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PUM

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Abstract

The invention discloses a scheduling method and a base station for a multi-carrier system. The method includes: in each subcarrier used by a user equipment UE, the base station obtains predetermined information of the UE, wherein the predetermined information includes: channel quality indicator CQI information and hybrid automatic repeat request HARQ information; the base station determines the priority value of the UE according to the predetermined information; the base station schedules multiple UEs according to the sequence of priority values ​​of multiple UEs from large to small. The invention improves the scheduling accuracy, thereby further improving the scheduling performance.

Description

Technical field [0001] The present invention relates to the field of communications, and in particular, to a scheduling method and a base station for a multi-carrier system. Background technique [0002] Scheduling represents a concept related to time order, and what the scheduling algorithm hopes to solve is how to determine a service order when multiple users compete for resources. From a theoretical perspective, the scheduling algorithm should be a branch of queuing theory. In order to achieve better system performance on limited frequency domain resources, among the various functions of Radio Resource Management (RRM), packet scheduling is the most critical link that affects system performance. The system resource allocation plan can largely determine the efficiency of the system. [0003] Traditional packet scheduling methods include round robin scheduling (RR), maximum signal-to-noise ratio scheduling (Max C / I), and proportional fair scheduling (PF). Suppose m i To represe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/18H04L27/26H04W72/10H04W72/12
Inventor 刘俊强杨光
Owner ZTE CORP
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