Transmission method and system for physical downlink shared channel

Abstract

The invention discloses a transmission method for a physical downlink shared channel (PDSCH). The transmission method comprises the following steps: a network side determines the transmission parameter of the PDSCH according to a DM-RS related transmission mode and / or scheduled UE related information, and the transmission parameter of the PDSCH comprises one or more of the following parameters: a resource mapping way of the PDSCH, used downlink DM-RS antenna ports, scrambling sequence identity (SCID) needed by the downlink DM-RS ports during initialization and a scrambling code initialization value X; the network side sends data according to the determined transmission parameter of the PDSCH. The invention further and correspondingly discloses a transmission system for the PDSCH. According to the method and the system, the DM-RS antenna port selection can be realized; multiple DM-RS antenna ports are used, so that the reliability of transmission is improved, interference is eliminated, the multiplexing capacity of MU-MIMO is increased, and the frequency-selective grain is increased.

Description

technical field

[0001] The present invention relates to the field of wireless communication, in particular to a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) transmission method and system. Background technique

[0002] In wireless communication technology, when multiple antennas are used on the base station side (such as evolved Node B (eNB)) to transmit data, spatial multiplexing can be adopted to increase the data transmission rate, that is, the same time-frequency resources are used at the transmitting end to Different antenna positions transmit different data, and a receiving end (such as user equipment (UE)) also uses multiple antennas to receive data. In the case of a single user, all antenna resources are allocated to the same user, and this user exclusively occupies the physical resources allocated to the base station side within a transmission interval. This transmission method is called Single User Multiple Input Multiple Output (Singl...

Examples

Embodiment 1

[0175] The UE uses the newly added carrier to transmit data, and the transmitted data corresponds to a single transmission block. For single DM-RS antenna port transmission, the antenna port of the PDSCH corresponding to DCI Format 1A is implicitly determined through the antenna port of the ePDCCH, ePDCCH and the corresponding scheduled PDSCH Use the same X value and SCID value. If the UE's ePDCCH is scheduled to be transmitted on antenna port 9, the UE's data is transmitted on the PDSCH on antenna port 9 by default. Here, antenna port 9 is used as an example. If other antenna ports are used, it can be deduced by analogy. Here, the downlink control information format takes DCI Format 1A as an example, and the newly added DCI Format 1E or DCI Format 1F is also applicable to this embodiment.

Embodiment 2

[0177] The UE uses the new carrier to transmit data. The transmitted data corresponds to a single transmission block. The PDSCH resources used by the UE are scheduled through DCI Format 1A. The single DM-RS antenna port for the UE to transmit data is implicitly determined by the UE ID or C-RNTI. If There are two optional antenna ports, then determine the antenna port used by the UE according to (UE ID / C-RNTI) Mod2 equal to 0 or equal to 1; if there are four optional antenna ports, then according to (UE ID / C-RNTI) The result of RNTI) Mod4 is equal to 0, or equal to 1, or equal to 2, and the latter is equal to 3 to determine the antenna port used by the UE. Here, the downlink control information format takes DCI Format 1A as an example, and the newly added DCI Format 1E or DCI Format 1F is also applicable to this embodiment.

Embodiment 3

[0179] The UE uses the new carrier to transmit data, and the transmitted data corresponds to a single transmission block. The PDSCH resource used by the UE is scheduled through DCI Format 1A, and the single DM-RS antenna port for the UE to transmit data is implicitly determined by the subframe type. Assuming that the TDD special subframe DwPTS adopts Normal CP, the new special subframe is configured as (DwPTS:GP:UpPTS)=(6:6:2), and supports DM-RS antenna ports 7-10 at this time; assuming the TDD special subframe Frame DwPTS adopts Extended CP, and the new special subframe configuration is (DwPTS:GP:UpPTS)=(5:5:2), and antenna port 5 is supported at this time; assuming that the subframe type is MBSFN subframe at this time, DM is supported - RS antenna port 7; assume that the subframe type is a general subframe at this time, and a single antenna port is fixed, such as 7, where the default SCID is 0, and the default X is x(0). Here, the downlink control information format takes D...

technical field

[0001] The present invention relates to the field of wireless communication, in particular to a physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) transmission method and system. Background technique

[0002] In wireless communication technology, when multiple antennas are used on the base station side (such as evolved Node B (eNB)) to transmit data, spatial multiplexing can be adopted to increase the data transmission rate, that is, the same time-frequency resources are used at the transmitting end to Different antenna positions transmit different data, and a receiving end (such as user equipment (UE)) also uses multiple antennas to receive data. In the case of a single user, all antenna resources are allocated to the same user, and this user exclusively occupies the physical resources allocated to the base station side within a transmission interval. This transmission method is called Single User Multiple Input Multiple Output (Singl...

Examples

Embodiment 1

[0175] The UE uses the newly added carrier to transmit data, and the transmitted data corresponds to a single transmission block. For single DM-RS antenna port transmission, the antenna port of the PDSCH corresponding to DCI Format 1A is implicitly determined through the antenna port of the ePDCCH, ePDCCH and the corresponding scheduled PDSCH Use the same X value and SCID value. If the UE's ePDCCH is scheduled to be transmitted on antenna port 9, the UE's data is transmitted on the PDSCH on antenna port 9 by default. Here, antenna port 9 is used as an example. If other antenna ports are used, it can be deduced by analogy. Here, the downlink control information format takes DCI Format 1A as an example, and the newly added DCI Format 1E or DCI Format 1F is also applicable to this embodiment.

Embodiment 2

[0177] The UE uses the new carrier to transmit data. The transmitted data corresponds to a single transmission block. The PDSCH resources used by the UE are scheduled through DCI Format 1A. The single DM-RS antenna port for the UE to transmit data is implicitly determined by the UE ID or C-RNTI. If There are two optional antenna ports, then determine the antenna port used by the UE according to (UE ID / C-RNTI) Mod2 equal to 0 or equal to 1; if there are four optional antenna ports, then according to (UE ID / C-RNTI) The result of RNTI) Mod4 is equal to 0, or equal to 1, or equal to 2, and the latter is equal to 3 to determine the antenna port used by the UE. Here, the downlink control information format takes DCI Format 1A as an example, and the newly added DCI Format 1E or DCI Format 1F is also applicable to this embodiment.

Embodiment 3

[0179] The UE uses the new carrier to transmit data, and the transmitted data corresponds to a single transmission block. The PDSCH resource used by the UE is scheduled through DCI Format 1A, and the single DM-RS antenna port for the UE to transmit data is implicitly determined by the subframe type. Assuming that the TDD special subframe DwPTS adopts Normal CP, the new special subframe is configured as (DwPTS:GP:UpPTS)=(6:6:2), and supports DM-RS antenna ports 7-10 at this time; assuming the TDD special subframe Frame DwPTS adopts Extended CP, and the new special subframe configuration is (DwPTS:GP:UpPTS)=(5:5:2), and antenna port 5 is supported at this time; assuming that the subframe type is MBSFN subframe at this time, DM is supported - RS antenna port 7; assume that the subframe type is a general subframe at this time, and a single antenna port is fixed, such as 7, where the default SCID is 0, and the default X is x(0). Here, the downlink control information format takes D...

Images