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Scheduling method and device for LTE (Long Term Evolution) system

A scheduling method and technology for a scheduling device, which are applied in the field of scheduling methods and devices of an LTE system, can solve the problems of increasing air interface resource overhead, reducing air interface transmission efficiency, and increasing transmission delay, so as to reduce transmission delay and improve transmission. Efficiency, reducing the effect of padding

Inactive Publication Date: 2019-01-04
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Padding transmits invalid information, which reduces the transmission efficiency of the air interface; although the packet error rate of the terminal receiving the data packet is generally 10%, retransmission will still increase the resource overhead of the air interface; for delay-sensitive services, due to error The retransmission brought by the packet will further increase the transmission delay

Method used

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  • Scheduling method and device for LTE (Long Term Evolution) system
  • Scheduling method and device for LTE (Long Term Evolution) system
  • Scheduling method and device for LTE (Long Term Evolution) system

Examples

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Embodiment 1

[0020] figure 1 It is a flow chart of an LTE system scheduling method provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation of scheduling the resource allocation of the LTE system downlink, and the method can be executed by the scheduling device of the LTE system provided by the embodiment of the present invention, and the device can be realized by software and / or hardware.

[0021] like figure 1 Described, the method of this embodiment specifically includes:

[0022] S110. Determine whether the initial modulation and coding scheme MCS corresponding to the downlink logical channel scheduled by the base station scheduler satisfies a first preset condition.

[0023] Among them, the scheduling control of downlink and uplink services in the LTE system is implemented in the scheduler of the evolved base station. Scheduling mainly refers to information such as the channel status, QoS, and buffer status report of each logical channel or l...

Embodiment 2

[0029] figure 2 It is a flowchart of an LTE system scheduling method provided by Embodiment 2 of the present invention. This embodiment is optimized on the basis of the above embodiments. In this embodiment, the method further includes: determining the The downlink logical channel needs to schedule the amount of data BSRx.

[0030] Correspondingly, the method in this embodiment specifically includes:

[0031] S210. Determine the corresponding MAC subheader overhead according to the downlink logical channel type.

[0032] Specifically, the overhead of the MAC subheader is defined according to the downlink logical channel type.

[0033] Specifically, if the downlink logical channel is a broadcast control channel (Broadcast Control Channel, BCCH) or a paging control channel (Paging Control Channel, PCCH), then the MAC subheader overhead is not increased, otherwise the MAC subheader of the preset byte is increased header overhead.

[0034] Among them, for the BCCH and PCCH t...

Embodiment 3

[0043] image 3 It is a scheduling method of an LTE system provided by Embodiment 3 of the present invention. This embodiment is optimized based on the above embodiments. In this embodiment, the step of determining the transport block size TBSize is further optimized as follows: according to the downlink logical channel type and the corresponding number of RBs allocated by the initial MCS; or, when there are multiple downlink logical channels, sum the number of RBs of multiple logical channels, and use the sum as the number of RBs finally scheduled to the terminal; according to the determined The number of RBs and the initial MCS determine the transport block size TBSize.

[0044]Correspondingly, the method in this embodiment specifically includes:

[0045] S310. Allocate the number of resource blocks RB according to the downlink logical channel type and the corresponding initial MCS; or, when there are multiple downlink logical channels, add the RB numbers of the multiple lo...

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Abstract

The invention discloses a scheduling method and device for an LTE (Long Term Evolution) system. The method includes the following steps that: whether an initial modulation and coding scheme (MCS) corresponding to a downlink logical channel scheduled by a base station scheduler meets a first preset condition is judged; and if the MCS meets the first preset condition, a finally scheduled MCS is determined according to transport block size TBSize and a data volume (BSRx) that needs to be scheduled by the downlink logical channel. According to the scheduling method and device provided by the embodiments of the invention, the MCS is adjusted, so that padding can be decreased, and therefore, the transmission efficiency of radio interface resources can be improved; and the packet error probability of data packets can be decreased, and transmission delay can be decreased.

Description

technical field [0001] Embodiments of the present invention relate to the field of mobile communication technologies, and in particular, to a scheduling method and device for an LTE system. Background technique [0002] For the resource allocation of the Long Term Evolution (LTE) downlink, 3GPP specifies three types: type0, type1, and type2. For the resource allocation methods of type0 and type1, 3GPP specifies the resource block group (Resource Block Group, RBG) The granularity of RBG is related to the system bandwidth. [0003] The scheduling control of downlink and uplink services in the LTE system is implemented in the scheduler of the evolved base station (Evolved Node B). Scheduling mainly refers to the channel status, QoS and buffer status of each logical channel or logical channel group of the terminal. Report (Buffer Status Report, BSR) and other information, determine the corresponding scheduling priority, and then further determine its modulation and coding schem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/02
CPCH04W24/02
Inventor 余秋星贺萃王鹏
Owner BEIJING XINWEI TELECOM TECH
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