Search space determining method

Abstract

A method for determining a search space of a physical downlink control channel in a wireless communication system, wherein the physical downlink control channel is periodically repeated in a time domain, the method characterized in that a starting position of the search space of the physical downlink control channel is unchanged within a repetition period of the physical downlink control channel.

Description

technical field

[0001] The present invention relates to the technical field of communication, in particular to the technical field of wireless communication. Background technique

[0002] In the field of wireless communication, in recent years, Machine Type Communication (MTC for short) is receiving continuous attention. Some MTC devices, such as typical smart meters, need to be installed in the basement, so the penetration loss is so great that these devices may not be able to effectively connect with network devices. Therefore, 3GPP has set up a topic specifically aimed at increasing the coverage of low-cost MTC devices. The goal is to increase the coverage of such MTC devices by up to 15dB.

[0003] In the existing 3GPP specification, data transmission is scheduled based on a physical downlink control channel (Physical Downlink Control Channel, PDCCH for short). In order to achieve a coverage gain of 15dB on the MTC device, the corresponding PDCCH signal is expected to...

Examples

Embodiment Construction

[0036] In the following detailed description of the preferred embodiment, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings show, by way of example, specific embodiments in which the invention can be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments in accordance with the invention. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. Accordingly, the following detailed description is not limiting, and the scope of the invention is defined by the appended claims.

[0037] First, in the existing 3GPP specifications, the search space of the PDCCH channel is defined by the following formula:

[0038]

[0039] Among them, L represents the aggregation level AL; Y k Represents a certain hash function; m=0,..., M-1, and M represents the number of possible PDCCH channels; N CC...

technical field

[0001] The present invention relates to the technical field of communication, in particular to the technical field of wireless communication. Background technique

[0002] In the field of wireless communication, in recent years, Machine Type Communication (MTC for short) is receiving continuous attention. Some MTC devices, such as typical smart meters, need to be installed in the basement, so the penetration loss is so great that these devices may not be able to effectively connect with network devices. Therefore, 3GPP has set up a topic specifically aimed at increasing the coverage of low-cost MTC devices. The goal is to increase the coverage of such MTC devices by up to 15dB.

[0003] In the existing 3GPP specification, data transmission is scheduled based on a physical downlink control channel (Physical Downlink Control Channel, PDCCH for short). In order to achieve a coverage gain of 15dB on the MTC device, the corresponding PDCCH signal is expected to...

Examples

Embodiment Construction

[0036] In the following detailed description of the preferred embodiment, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings show, by way of example, specific embodiments in which the invention can be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments in accordance with the invention. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. Accordingly, the following detailed description is not limiting, and the scope of the invention is defined by the appended claims.

[0037] First, in the existing 3GPP specifications, the search space of the PDCCH channel is defined by the following formula:

[0038]

[0039] Among them, L represents the aggregation level AL; Y k Represents a certain hash function; m=0,..., M-1, and M represents the number of possible PDCCH channels; N CC...

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