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Scheduling request transmission method and apparatus for decoupled downlink-uplink

A downlink and scheduling request technology, applied in the field of wireless communication, can solve the problems of D-SR monitoring strong interference, high transmission power, etc.

Inactive Publication Date: 2019-04-12
ERICSSON (CHINA) COMMUNICATION COMPANY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

PUCCH formats 1a / 1b and format 3 have to reach the macro base station, which means that the transmission power will be higher than that required to reach the pico base station, so it will 1) for the above format 1a / 1b case in the pico cell other D-SR monitoring of normal UE causes strong interference

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  • Scheduling request transmission method and apparatus for decoupled downlink-uplink
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  • Scheduling request transmission method and apparatus for decoupled downlink-uplink

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Embodiment Construction

[0017] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be apparent, however, to those skilled in the art that the present invention may be embodied in many different forms and should not be construed as limited to the examples and specific details set forth herein. Like reference numerals refer to like elements throughout the description.

[0018] In this disclosure, although the present invention has been illustrated using specific terms, this should not be construed as limiting the scope of the present invention to the above-mentioned communication system only. With the rapid development of communications, there will of course also be future types of technologies and systems to which the present invention is applicable.

[0019] figure 2 According to an embodiment of the present invention, an exemplary schematic flowchart of a method for transmitting a Scheduling Request (SR) for a decoupled DL-UL...

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Abstract

The present disclosure provides a method (10) for decoupled downlink-uplink scheduling request transmission in a heterogeneous network, wherein the heterogeneous network includes at least two cells, the method includes: determining (11) to use PUCCH format 1a / 1b / 3 to transmit positive D‑SR and HARQ‑ACK / NACK in the subframe of the current data scheduling request D‑SR on the PUCCH; using PUCCH format 1 / 1a / 1b or format 3 transmits (12) HARQ-ACK / NACK and negative D-SR on PUCCH in the subframe of the current D-SR, and the next subframe after the current D-SR The SR is transmitted in the subframe of the SR. In this method, UE's Scheduling Request (SR) can be correctly detected in the pico base station to trigger UL transmission in decoupled UL / DL scenarios in various cases, and any kind of backhaul can be supported.

Description

technical field [0001] The present invention generally relates to wireless communication technology, and in particular, relates to a method and device for transmitting a scheduling request for a decoupled downlink-uplink (DL-UL) in a heterogeneous network. Background technique [0002] In 3GPP-LTE-Advanced, coordinated multipoint transmission (CoMP) is proposed as a key technology for further improving cell edge performance. For uplink CoMP, one of the scenarios of interest is the heterogeneous network scenario defined by 3GPP. The key feature in this scenario is for some UEs (e.g. as in a decoupled DL-UL scenario as exemplified in a heterogeneous network figure 1 decoupled DL-UL of the UE shown). Specifically, because macro cell A has much higher transmit power than pico cell B, the coverage is different for macro cell A and pico cell B. For a UE located in macro cell coverage but at the coverage boundary between macro cell A and pico cell B, the downlink signal received...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04
CPCH04W72/21H04L1/1671H04L1/1812H04L1/1854H04W72/20H04L5/0055H04W72/1263
Inventor 赵振山卢前溪
Owner ERICSSON (CHINA) COMMUNICATION COMPANY LTD