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Method of transmitting scheduling information on an enhanced uplink dedicated channel in a mobile communication system

A technology for enhancing uplink and mobile communication systems, applied in the field of WCDMA communication systems, can solve problems such as supporting efficient transmission of scheduling information

Inactive Publication Date: 2007-02-21
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, a variable data size is required, which makes it difficult to support efficient transfer of scheduling information through physical layer signaling with a restricted slot format

Method used

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  • Method of transmitting scheduling information on an enhanced uplink dedicated channel in a mobile communication system
  • Method of transmitting scheduling information on an enhanced uplink dedicated channel in a mobile communication system
  • Method of transmitting scheduling information on an enhanced uplink dedicated channel in a mobile communication system

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0043] Uplink data is transmitted on a conventional E-DCH within a PHY layer transmission period TTI (Transmission Time Interval), and, at the same time, a MAC-e Control PDU including scheduling information is transmitted on another E-DCH.

[0044] The MAC-e entity of the UE reports the amount of buffered data to the Node B as scheduling information. The Node B then allocates the maximum data rate to the UE based on the scheduling information. The UE transmits packet data at or below the allocated maximum data rate, or at the minimum data rate when no data rate is allocated to the UE. Subsequently, the UE transmits scheduling information according to a predetermined rule.

[0045] image 3 E-DCH transmission according to an embodiment of the invention is illustrated. The E-DCH transmission operation includes a process 301 for transmitting data on the second E-DCH (E-DCH #2) and a process 310 for transmitting scheduling information on the first E-DCH (E-DCH #1) .

[0046] ...

no. 2 example

[0070] Although MAC-e data PDUs and MAC-e control PDUs are transmitted on different E-DCHs, only one type of E-DCH is allowed to be transmitted within one TTI. Compared to the first embodiment of the invention which transmits both MAC-e data PDUs and MAC-e control PDUs at the same time, the separate MAC-e PDU transmission eliminates what would otherwise be caused by multiple ACK / NACK signals Dissipation of Node B transmit power and HARQ complexity caused by transmission to each UE.

[0071] When transmitting PDUs with different attributes, the UE uses different E-DHCs, but transmits only one PDU within one TTI instead of transmitting them at the same time. Although this example uses image 3 Channel configuration shown, but TFC is chosen so that multiple E-DCHs are not multiplexed within one TTI.

[0072] An example E-TFC for transmitting one E-DCH in one TTI is given in Table 2 below.

[0073] TFS for E-DCH#1

TF0, TF1

TFS for E-DCH#2

TF0, TF1, TF2...

no. 3 example

[0078] One E-DCH is transmitted in one TTI, and the transmission of the MAC-e Control PDU is notified through a TF used to demodulate the E-DCH. More specifically, the UE transmits an indicator indicating transmission of a MAC-e Control PDU including scheduling information. Preferably, the indicator is a predetermined TF.

[0079] When necessary, the UE transmits a MAC-e Control PDU including scheduling information or a MAC-e Data PDU including packet data on one E-DCH. In the previous case, the UE transmits an indicator indicating a MAC-e control PDU on a further control channel.

[0080] If the indicator indicates that the received MAC-e PDU is a MAC-e Control PDU including scheduling information, the Node B provides the MAC-e PDU to the MAC-e controller. If the indicator indicates that the received MAC-e PDU is a MAC-e data PDU, the Node B stores the MAC-e PDU in a reordering buffer so that it can be delivered to upper layers. The MAC-e controller reads information about...

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Abstract

An apparatus and method of transmitting scheduling information from a UE to a Node B to request Node B controlled scheduling in an asynchronous CDMA communication system supporting an E-DCH packet data service is provided. The UE generates a MAC-e PDU including only scheduling information representing a buffer status and a power status in relation to uplink data transmission, and transmits the MAC-e PDU on an E-DCH along with TF information indicating the transmission of the MAC-e PDU including the scheduling information. The Node B receives the scheduling information on the E-DCH and schedules uplink data transmission according to the scheduling information.

Description

technical field [0001] The present invention relates generally to a WCDMA (Wideband Code Division Multiple Access) communication system, and more particularly to a method of transmitting scheduling information for requesting uplink packet data services. Background technique [0002] The third generation mobile communication system UMTS (Universal Mobile Telecommunications Service) is based on the GSM (Global System for Mobile Communications) and GPRS (General Packet Radio Service) standards and uses WCDMA technology. The UMTS system provides unified services for the delivery of packetized text, data voice and video, and multimedia data at rates of 2 Mbps or higher to mobile subscribers or computer users around the world. With the introduction of the idea of ​​virtual access, UMTS enables access to any endpoint in the network. For example, virtual access refers to packet-switched access using a packet protocol such as IP (Internet Protocol). [0003] The UMTS system uses EU...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04J3/24H04W72/12
CPCH04L1/0025H04L1/0028H04W72/1284H04L1/1867H04W72/21H04B7/2628
Inventor 许允亨崔成豪李周镐郭龙准郑景仁
Owner SAMSUNG ELECTRONICS CO LTD
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