Downlink transmission method and equipment

A technology of transmission method and equipment, applied in the direction of transmission system, digital transmission system, electrical components, etc.

Active Publication Date: 2011-10-19
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] The embodiment of the present invention provides a downlink transmission method a

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  • Downlink transmission method and equipment
  • Downlink transmission method and equipment

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Embodiment Construction

[0032]In order to ensure the receiving performance of the PHICH, the embodiment of the present invention provides a downlink transmission method. In this method, the base station only transmits the PHICH when the current remaining power on the resources currently used to transmit the PHICH can meet the transmission power required for sending the PHICH to the terminal. Allocate PHICH transmission resources for the terminal and use the allocated PHICH transmission resources to send PHICH to the terminal after sending uplink scheduling signaling for PUSCH transmission to the terminal, otherwise, give up the current scheduling of PUSCH transmission for the terminal.

[0033] see figure 1 , the downlink transmission method provided by the embodiment of the present invention includes the following steps:

[0034] Step 10: After the base station allocates the physical uplink shared channel (PUSCH) transmission resource for the terminal, it determines the transmission power required t...

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Abstract

The embodiment of the invention discloses a downlink transmission method and downlink transmission equipment, relating to the technical field of wireless communication, and aiming at solving the problem how to ensure the receiving performance of a physical HARQ (hybrid automatic repeat request) indicator channel (PHICH). In the invention, a base station determines transmission power needed by transmitting the PHICH to a terminal according to the downlink channel condition of the terminal after distributing transmission resource of a PUSCH (physical uplink shared channel) for the terminal; the base station determines whether the requirement of the transmission power can be met according to the current surplus power for transmitting the resources of the PHICH, if so, the PHICH transmission resource is distributed to the terminal, and after an uplink scheduling signaling transmitted by the PUSCH is transmitted to the terminal, the PHICH is transmitted to the terminal according to the PHICH transmission resource used and distributed by the transmission power, and if not, the scheduling to the current PUSCH transmission of the terminal is abandoned. By adopting the invention, the PHICH receiving performance can be ensured.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a downlink transmission method and equipment. Background technique [0002] In the Long Term Evolution (LTE) system, for data transmission on the Physical Uplink Shared Channel (PUSCH), the base station needs to send an acknowledgment / negative acknowledgment (ACK / NACK) feedback in the corresponding downlink subframe information, and the feedback information is carried on a physical hybrid-ARQ indicator channel (PHICH). There is a certain timing relationship between the downlink ACK / NACK feedback and the corresponding PUSCH transmission, so for the PUSCH transmission on the same subframe, the corresponding ACK / NACK feedback is also performed on the same downlink subframe. For the PUSCH transmission of subframe n, its corresponding PHICH is usually in subframe n+k PHICH Transmission: For Frequency Division Duplex (FDD) systems, k PHICH The value of is 4; for Time Di...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04W72/12
CPCH04W52/346H04L1/1692H04W52/325H04W72/12
Inventor 朱志球
Owner DATANG MOBILE COMM EQUIP CO LTD
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