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Transmission method and device for uplink synchronization command word in OFDM mobile communication system

A technology of a mobile communication system and a sending method, which is applied in the field of sending uplink synchronous command words, can solve problems such as no technical solutions, and achieve the effects of convenient and fast demodulation, saving network resources, and reducing signaling overhead

Inactive Publication Date: 2008-02-20
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no specific technical solution in the industry on how to send synchronization commands to user equipment

Method used

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  • Transmission method and device for uplink synchronization command word in OFDM mobile communication system
  • Transmission method and device for uplink synchronization command word in OFDM mobile communication system
  • Transmission method and device for uplink synchronization command word in OFDM mobile communication system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] This embodiment is described by taking the multiplexing of the uplink synchronization command SC and the downlink dedicated scheduling information and sending it to the UE as an example.

[0079] Referring to FIG. 1, a communication system in this example includes: an eNB (E-UTRANNodeB, evolved base station) 100 and a user equipment UE101, wherein one or more eNBs on the network side form an E-UTRAN ( Evolved Universal Terrestrial Radio Access Network, an evolved universal terrestrial radio access network); the base station eNB100 is used to generate an uplink synchronization command word SC, and perform multiplexing with dedicated scheduling information, and multiplex the SC and dedicated scheduling information are mapped to corresponding physical resource blocks in the OFDM symbol and sent to the user equipment UE101; the user equipment UE101 is configured to perform uplink transmission synchronization adjustment according to the SC.

[0080] Referring to Fig. 2, a pr...

Embodiment 2

[0114] In this embodiment, the uplink synchronization command SC is encapsulated in a control protocol data unit PDU at the medium access control MAC layer and sent to the UE as an example for illustration.

[0115] Referring to Figure 8, the network side system in this embodiment includes two parts, the physical layer and the MAC layer, wherein the physical layer includes: a common control module 800, an uplink receiving, demodulating and measuring module 801, downlink channel mapping, modulation and sending module 802 and channel encoding and decoding processing module 803.

[0116] The public control module 800 is used to complete part of the physical layer signaling allocation, and manage and control the resources of the physical layer; the uplink reception, demodulation and measurement module 801 is used to complete uplink channel estimation, data detection, decoding Reconcile and measure the received signal to perform uplink synchronization control and other processing; ...

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Abstract

The utility model discloses a transmission way for uplink synchronization command words in OFDM mobile communication system, which is characterized in that uplink synchronization command words (SC) are sent to UE together with special dispatching information or packaged in protocol data units (PDU) and sent to UE to provide convenience for a receiver to conduct fast demodulation and timing adjustment. Transmission of uplink synchronization command words (SC) with special dispatching information to UE can meet the necessity of frequent adjustment of uplink synchronization in the network. In case of occasions that frequent adjustment of uplink synchronization is not needed, uplink synchronization codes (SC) are packaged in protocol data units (PDU) and sent to UE, which saves network resources and reduces signaling spending. The utility model also discloses a processing device and user device for synchronization command words (SC).

Description

technical field [0001] The invention relates to the communication field, in particular to a method and a device for sending an uplink synchronization command word in an OFDM mobile communication system. Background technique [0002] OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) is a kind of MCM (Multicarrier Modulation, multi-carrier modulation). Compared with traditional multi-carrier modulation, it has higher spectrum utilization. In the OFDM mobile communication system, the data stream is serially converted into N sub-data streams with a lower rate, and they are used to modulate N sub-carriers respectively and then transmitted in parallel. Since the rate of the sub-data stream is the original 1 / N, that is, the symbol period is expanded to N times of the original, which is far greater than the maximum delay spread of the channel, so a wideband frequency selective channel is divided into N narrowband flat fading channels, thu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26
Inventor 吴松程履帮徐铁铸
Owner DATANG MOBILE COMM EQUIP CO LTD
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