Radio base station, user equipment and method used in mobile communication system

A technology of mobile communication system and wireless base station, which is applied in the direction of transmission system, wireless communication, data exchange through path configuration, etc., and can solve problems such as weak receiving power

Active Publication Date: 2009-08-12
NTT DOCOMO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the other hand, in the uplink, from the user equipment near the base station, the base station observes relatively strong received power, but from the user equipment at the edge of the cell end Can only get relatively weak receiving power

Method used

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  • Radio base station, user equipment and method used in mobile communication system
  • Radio base station, user equipment and method used in mobile communication system
  • Radio base station, user equipment and method used in mobile communication system

Examples

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Embodiment 1

[0057] (base station - downlink)

[0058] image 3 A partial functional block diagram showing a base station according to an embodiment of the present invention. exist image 3 mainly describes functional elements or entities related to downlink scheduling. image 3 Buffers 1 to N, downlink resource allocation unit 32, transmission power calculation units 1 to N of downlink L1 / L2 control channels, coverage determination unit 34, and transmission cycle control of uplink L1 / L2 control channels are depicted in unit 36 ​​, downlink signal generation unit 38 , shared data channel generation unit 382 and L1 / L2 control channel generation unit 384 .

[0059] Each of the buffers 1 to N temporarily stores transmission data (downlink transmission data) to be transmitted to each of the terminals 1 to N, and notifies the downlink resource allocation unit 32 of information on the accumulated amount of data waiting for transmission, etc. . "Terminal" is synonymous with "user device", an...

Embodiment 2

[0113] When there are multiple types of TTIs as described above, there is a concern that signal processing may become complicated. However, such a complicated problem can be alleviated by appropriately scheduling packets with different TTIs.

[0114] Figure 17 An example of allocation of radio resources in uplink is shown. In the illustrated example, a first resource block with a long TTI (2.0 ms) and a narrow bandwidth and a second resource block with a short TTI (0.5 ms) and a wide bandwidth are prepared. As an example, a first resource block is allocated to a user equipment whose channel condition is expected to be relatively poor, and a second resource block is allocated to a user equipment equipment whose channel condition is expected to be relatively good. The grouping of these user equipments can be performed at the base station based on CQI for uplink, path loss, and the like. CQI is represented by the reception quality of a reference signal (pilot channel) receive...

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Abstract

A radio base station used in a mobile communication system has a scheduler that assigns, to user equipments, one or more resource blocks specified by use of a predetermined bandwidth and a transmission time interval; and a means that notifies the user equipments of scheduling information indicative of the assignment contents of the wireless resources. The scheduling information is made such that the downstream data channel and downstream control channel are transmitted with the transmission time interval as the transmission unit and that the upstream control channel is transmitted with an integral multiple of the transmission time interval as the transmission unit.

Description

technical field [0001] The present invention relates to a radio base station, a user device and a method used in a mobile communication system. Background technique [0002] In this technical field, research and development on next-generation mobile communication systems are being accelerated. In this mobile communication system, signals are transmitted in packets during each unit transmission period called a transmission time interval (TTI: Transmission Time Interval). A transmission time interval TTI may also be said to be a duration, a subframe, or the like. Therefore, the TTI becomes the basis of various signal processing such as radio resource allocation units, channel coding units, and retransmission units. [0003] The period until the data channel including user data is sent to the communication partner, demodulated and decoded on the communication partner side, and the delivery acknowledgment (positive response or negative response) is received from the communicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/12H04L47/20H04L47/22
CPCH04L47/2433H04W72/1284H04L47/10H04L47/14H04W72/1231H04L47/20H04W72/1278H04W72/0446H04L47/22H04W72/1263H04W72/542H04L12/28H04W72/12H04W8/04
Inventor 樋口健一岸山祥久佐和桥卫
Owner NTT DOCOMO INC
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