Unlock instant, AI-driven research and patent intelligence for your innovation.

Transmission method and transmission device for uplink demodulation reference symbols

A technology for demodulating reference symbols and transmission methods, applied in transmission systems, digital transmission systems, multiple use of transmission paths, etc., can solve the problem that the number of DMRSs cannot be maintained, and that more users cannot reuse uplink physical resources and uplink physical resources. Problems such as low reuse rate

Active Publication Date: 2017-10-24
BEIJING SAMSUNG TELECOM R&D CENT +1
View PDF12 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if there are only 2 SC-FDMA symbols as DMRS in the time domain, there can only be 2 orthogonal OCCs, and, when there are more than two users sharing resources on the uplink PUSCH and they are allocated to the frequency domain resources of the PUSCH When the overlapping is not complete, the existing technology cannot maintain the number of orthogonal DMRS, and cannot enable more users to multiplex uplink physical resources, that is, in this multi-user situation, the multiplexing rate of uplink physical resources is low

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Transmission method and transmission device for uplink demodulation reference symbols
  • Transmission method and transmission device for uplink demodulation reference symbols
  • Transmission method and transmission device for uplink demodulation reference symbols

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] In the first embodiment, a method for transmitting demodulation reference symbols is described in the case of a PUSCH scheduled by control signaling, and the PUSCH at this time is scheduled by control signaling (UL DCI).

[0097] The resource allocation method of the UE has the following two cases. One situation is that the number of PRBs allocated by the UE to transmit PUSCH frequency domain resources is related to the location of the frequency domain resources. For example, the number of PRBs that the UE can use in different frequency domain resource locations is different, so that the UE transmits PUSCH in the frequency domain. The resources either completely overlap, and the frequency domain resources for the UE to transmit PUSCH either do not overlap at all, and the frequency domain resources with PRB numbers of 1, 2, and 4 for transmitting PUSCH do not overlap at all, and they are located in different frequency domain locations, such as Figure 8 shown. In this c...

Embodiment 2

[0191] In the second embodiment, a method for transmitting demodulation reference symbols in the case of PUSCH without control signaling scheduling (Grant-less) is described.

[0192] The resource mode selected by the UE has the following two situations. One case is that the number of PRBs that the UE selects to transmit the PUSCH frequency domain resource is related to the location of the frequency domain resource. For example, the number of PRBs that the UE can use in different frequency domain resource locations is different, so that the UE transmits the PUSCH frequency domain. The resources either completely overlap, and the frequency domain resources for the UE to transmit PUSCH or do not overlap at all, such as Figure 8 As shown, the frequency domain resources with PRB numbers of 1, 2, and 4 for transmitting PUSCH do not overlap at all. In this case, as long as one of the three factors of OCC, comb and CS of the DMRS is different, the DMRS is orthogonal. Another situa...

Embodiment 3

[0232] In the third embodiment, the power control method for the DMRS into which the comb is introduced is mainly described. That is, the UE needs to determine the power for transmitting the DMRS according to whether the DMRS adopts the comb mode and the adopted comb format.

[0233] In the power of the previous PUSCH, for one UE, the PUSCH and the DMRS use exactly the same subcarriers, and the transmission power of the PUSCH is the same as the power of the DMRS used to demodulate this PUSCH. After the introduction of the DMRS of comb, the PUSCH of the UE is transmitted on all sub-carriers, while the DMRS of the UE is transmitted on the RPF sub-carriers of the interval, and the sub-carriers between the UE sending DMRS intervals, the UE does not transmit anything, In this way, if the power transmitted by the UE on each DMRS subcarrier is the same as the power transmitted by the UE on each PUSCH subcarrier, then the total power transmitted by the UE on all subcarriers sent by th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a transmission method and a transmission device for uplink demodulation reference symbols. The method comprises the steps of determining a format for demodulating the uplink demodulation reference symbols of the PUSCH by UE according to frequency domain resources occupied by the PUSCH, wherein the format for demodulating reference symbols is composed of at least one of the following formats: demodulating the cyclic shift of a demodulation reference symbol sequence, demodulating the superimposed orthogonal code of the reference symbol sequence and demodulating a broach occupied by the reference symbol sequence, and the broach is composed of sub-carriers occupied by the reference symbol sequence and arranged at designated intervals and the intervals between the sub-carriers are the same; if the broach format for demodulating reference symbols is adopted, conducting the channel estimation through using the subcarriers with the specified intervals, and conducting the data demodulation by utilizing the estimated value of the channel; transmitting the uplink information and demodulation reference symbols over physical resources by adopting the determined format of the demodulation reference symbols. According to the invention, the multiplexing rate of uplink physical resources in a multi-user scene can be improved.

Description

technical field [0001] The present application relates to the field of wireless communication technologies, and in particular, to a method and apparatus for transmitting uplink demodulation reference symbols. Background technique [0002] Currently, the Long Term Evolution (LTE, Long Term Evolution) technology supports two duplex modes: Frequency Division Duplex (FDD, Frequency Division Duplex) and Time Division Duplex (TDD, Time Division Duplex). LTE transmission includes transmission from a base station (eNB) to a user equipment (UE, User Equipment) (referred to as downlink, DL, Downlink) and transmission from the UE to the base station (referred to as uplink, UL, Uplink). For the TDD system, the uplink and the downlink are separately transmitted on the same carrier at different times; while for the FDD system, the uplink and the downlink are separately transmitted on different carriers. figure 1 It is a schematic diagram of the frame structure of the TDD system of LTE. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00
CPCH04L5/0048H04L5/0091H04L5/0016H04L5/0094H04L5/1469H04W52/146H04W52/325H04L5/0051H04W52/246H04L5/005H04L27/2643H04W72/0473H04W72/23H04W72/21
Inventor 付景兴喻斌钱辰熊琦
Owner BEIJING SAMSUNG TELECOM R&D CENT