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Uplink synchronous command transfer method and system

A synchronous computing and unified technology, applied in communication between multiple stations, wireless communication, electrical components, etc., can solve problems such as unschedulable, system throughput reduction, CCE waste, etc., to avoid service quality degradation and improve Band utilization efficiency and the effect of reducing CCE waste

Inactive Publication Date: 2011-07-06
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the impact of synchronization commands is considered, some UEs without downlink data will be prioritized first, which will lead to a decrease in system throughput
At the same time, if there are multiple UEs that only send synchronization commands, these UEs will only be allocated a small bandwidth to carry the synchronization commands, which will cause insufficient utilization of CCEs (control channel elements, control channel elements), resulting in CCE waste of
In turn, UEs that need to deliver a large number of services have no CCE resources available, resulting in failure to be scheduled, wasting system bandwidth, and reducing system throughput
Or the service QoS (quality of service) of some UEs is not high, but due to the need to increase the priority due to synchronization commands, these UEs must be scheduled, which will reduce the service quality of other UEs and affect the experience of other UEs with high service quality

Method used

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  • Uplink synchronous command transfer method and system
  • Uplink synchronous command transfer method and system
  • Uplink synchronous command transfer method and system

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Embodiment Construction

[0046] The present invention proposes that the synchronization command for UE is sent separately, instead of the synchronization command of each UE being transmitted in its own PDSCH. In this way, it is possible to avoid increasing the priority of some UEs due to the synchronization command, and these UEs will not be ranked first in the conventional scheduling algorithm at this time.

[0047] Specifically, the base station encapsulates the synchronization command to be sent to one or more UEs in a MAC PDU, and sends the MAC PDU through the PDSCH.

[0048] In addition, when encapsulating the MAC PDU, the base station also encapsulates the user ID (identification) of the one or more UEs in the MAC header of the MAC PDU, and may also encapsulate the power control information of the one or more UEs Encapsulated in the MAC PDU.

[0049] In order to indicate the position of the MAC PDU on the PDSCH, so that the UE can receive the MAC PDU, the base station generates DCI (downlink co...

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Abstract

The invention discloses an uplink synchronous command transfer method and an uplink synchronous command transfer system, wherein the method comprises the following steps that: a base station packages a synchronous command to be sent to one or more user equipment (UE) into a medium access control (MAC) protocol data unit (PDU); and the base station sends the MAC PDU through a physical downlink shared channel (PDSCH). By the method and the system provided by the invention, the waste of a control channel element (CCE) caused by the increase of the UE only transferring the synchronous command can be reduced, so that the utilization efficiency of the CCE is improved, the throughput of the system is improved, and the utilization efficiency of a frequency band is improved.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and system for transmitting an uplink synchronization command. Background technique [0002] In a 3GPP (Third Generation Partnership Projects, Third Generation Partnership Project) LTE (Long-Term Evolution, long-term evolution) system, uplink synchronization is implemented through random access. During the random access process, the base station will send a deviation relative to the synchronization reference time to the UE (User Equipment, user equipment) in a random access response, with a length of 11 bits. After the random access procedure is successful, the base station needs to send a synchronization command to the UE regularly or irregularly during service transmission. Make the UE maintain uplink synchronization to ensure normal transmission of services. The synchronization command at this time is no longer 11 bits, nor is it the deviation relative ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/14H04B7/26
Inventor 李岩梁枫王衍文刘文豪
Owner ZTE CORP