CN107294673B

CN107294673B - Uplink transmission method and device

Info

Publication number: CN107294673B
Application number: CN201610197121.9A
Authority: CN
Inventors: 高雪娟; 郑方政
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2016-03-31
Filing date: 2016-03-31
Publication date: 2020-05-15
Anticipated expiration: 2036-03-31
Also published as: CN107294673A; WO2017166901A1

Abstract

The invention provides an uplink transmission method and device, wherein the uplink transmission method comprises the following steps: receiving a first downlink control channel, wherein the first downlink control channel is used for bearing scheduling information of a first uplink shared channel, and determining a first frequency domain resource for transmitting the first uplink shared channel according to the scheduling information borne by the first downlink control channel; determining a second frequency domain resource for transmitting the pilot frequency according to the indication of the prearranged and/or the configuration signaling; transmitting a first uplink shared channel on a first frequency domain resource, and transmitting a pilot frequency of the first uplink shared channel on a second frequency domain resource; the size of the second frequency domain resource is greater than or equal to the size of the first frequency domain resource. According to the scheme, the second frequency domain resource for transmitting the pilot frequency is allocated according to the instruction of the prearranged and/or configured signaling, so that the pilot frequencies of a plurality of first uplink shared channels which share the same frequency domain resource for pilot frequency transmission can be aligned after mapping, and correct transmission and demodulation of uplink data are ensured.

Description

Uplink transmission method and device

Technical Field

The present invention relates to the field of communications technologies, and in particular, to an uplink transmission method and apparatus.

Background

The conventional LTE FDD (frequency division duplex) system uses a frame structure (FS 1 for short) type 1, which is shown in fig. 1. In an FDD system, uplink and downlink transmissions use different carrier frequencies, and both uplink and downlink transmissions use the same frame structure. On each carrier, a radio frame with a length of 10ms includes 10 subframes with a length of 1ms, each subframe is divided into time slots with a length of 0.5ms, and the Transmission Time Interval (TTI) duration of uplink and downlink data Transmission is 1 ms.

The conventional LTE TDD (time division duplex) system uses a frame structure (FS 2 for short) type 2, and the structure is shown in fig. 2. In a TDD system, uplink and downlink transmissions use different subframes or different time slots on the same frequency. Each 10ms radio frame in FS2 consists of two 5ms fields, each field containing 5 subframes of 1ms length. Subframes in FS2 are divided into three categories: the subframe comprises a Downlink subframe, an Uplink subframe and special subframes, wherein each special subframe comprises three parts of a Downlink transmission Time Slot (DwPTS, Downlink Pilot Time Slot), a Guard interval (GP, Guard Period) and an Uplink transmission Time Slot (UpPTS, Uplink Pilot Time Slot). The DwPTS can transmit downlink pilot frequency, downlink service data and downlink control signaling; the GP does not transmit any signal; the UpPTS transmits only random access and Sounding Reference Signals (SRS), and cannot transmit uplink traffic or uplink control information. Each half frame comprises at least 1 downlink subframe, at least 1 uplink subframe and at most 1 special subframe. Table 1 shows 7 uplink and downlink subframe allocation schemes performed in FS 2.

TABLE 1

The data and pilot (i.e. reference symbols, or DMRS, used for data demodulation) structure of LTE PUSCH (Physical Uplink Shared Channel) in one subframe is shown in fig. 3a and 3 b. Under normal CP (Cyclic Prefix), the 4 th symbol in each slot in each subframe is used for transmitting pilot and the rest of the symbols are used for transmitting data, and under extended CP, the 3 rd symbol in each slot in each subframe is used for transmitting pilot and the rest of the symbols are used for transmitting data. The uplink pilot frequency is a pilot frequency exclusive to the terminal and is generated according to the actual bandwidth size scheduled by the PUSCH. In order to support uplink MU-MIMO (Multi-User Multiple-input Multiple-Output), each column of pilot may implement orthogonal transmission of pilots of Multiple terminals sharing the same resource by performing cyclic shift on the same pilot base sequence, so that a receiving end may distinguish pilot information of different terminals through cyclic shift.

In the LTE system, existing channel transmission is defined in units of subframes, and does not involve a transmission structure shorter than 1 ms.

However, with the development and change of the mobile communication service demand, a plurality of organizations such as ITU (international telecommunications Union) have defined higher requirements for the user plane delay performance of future mobile communication systems. One of the main methods to shorten user time-delay performance is to reduce the TTI length. When the transmission TTI is shortened, there is no clear way how to perform data transmission.

Disclosure of Invention

The invention aims to provide an uplink transmission method and device, and solves the problem that in the prior art, correct demodulation may not be performed after data transmission due to the fact that no clear data transmission method exists after a transmission time interval is shortened.

In order to solve the above technical problem, an embodiment of the present invention provides an uplink transmission method, including:

receiving a first downlink control channel, wherein the first downlink control channel is used for bearing scheduling information of a first uplink shared channel, and determining a first frequency domain resource for transmitting the first uplink shared channel according to the scheduling information borne by the first downlink control channel;

determining a second frequency domain resource for transmitting the pilot frequency according to the indication of the prearranged and/or the configuration signaling;

transmitting the first uplink shared channel on the first frequency domain resource, and transmitting a pilot of the first uplink shared channel on the second frequency domain resource;

wherein a size of the second frequency domain resource is greater than or equal to a size of the first frequency domain resource.

Optionally, the second frequency domain resource is:

the system uplink transmission bandwidth, or the number of resource blocks contained in the system uplink transmission bandwidth, or the number of subcarriers contained in the system uplink transmission bandwidth, or the number of resource units contained in the system uplink transmission bandwidth;

wherein the resource unit is one subcarrier on a predefined symbol or X2 consecutive subcarriers on a symbol, and X2 is a positive integer greater than 0.

Optionally, the second frequency domain resource is:

m resource blocks/subcarriers/resource units in the system uplink transmission bandwidth, wherein the second frequency domain resource is smaller than the system uplink transmission bandwidth;

wherein the M resource blocks/subcarriers/resource elements are continuous or discontinuous in the frequency domain, M is a predefined or configured positive integer greater than or equal to 1, the resource element is one subcarrier on one predefined symbol or continuous X2 subcarriers on one symbol, and X2 is a positive integer greater than 0.

Optionally, the second frequency domain resource is:

and sharing the same frequency domain resource to carry out the union of the first frequency domain resources corresponding to the plurality of first uplink shared channels for pilot frequency transmission.

Optionally, the configuration signaling is:

a higher layer signaling or an indication field in the first downlink control channel.

Optionally, before transmitting the pilot on the second frequency domain resource, the uplink transmission method further includes:

acquiring a cyclic shift indication carried in the first downlink control channel;

determining a cyclic shift value of the pilot according to the cyclic shift indication, generating the pilot corresponding to the size of the second frequency domain resource according to the cyclic shift value.

The present invention also provides an uplink transmission apparatus, including:

a first processing module, configured to receive a first downlink control channel, where the first downlink control channel is used to carry scheduling information of a first uplink shared channel, and determine, according to the scheduling information carried by the first downlink control channel, a first frequency domain resource for transmitting the first uplink shared channel;

a first determining module, configured to determine, according to an indication of a predetermined and/or configuration signaling, a second frequency domain resource for transmitting a pilot;

a first transmission module, configured to transmit the first uplink shared channel on the first frequency domain resource, and transmit a pilot of the first uplink shared channel on the second frequency domain resource;

Optionally, the second frequency domain resource is:

Optionally, the configuration signaling is:

Optionally, the uplink transmission device further includes:

a first obtaining module, configured to obtain, by the first transmitting module, a cyclic shift indication carried in the first downlink control channel before the pilot is transmitted on the second frequency-domain resource;

a second processing module, configured to determine a cyclic shift value of the pilot according to the cyclic shift indication, and generate the pilot corresponding to the size of the second frequency domain resource according to the cyclic shift value.

The invention also provides an uplink transmission method, which comprises the following steps:

determining a first frequency domain resource for a terminal to transmit a first uplink shared channel, and sending a first downlink control channel to the terminal, wherein the first downlink control channel is used for carrying scheduling information of the first uplink shared channel, and the first frequency domain resource is contained in the scheduling information;

determining a second frequency domain resource for the terminal to transmit the pilot frequency according to a predetermined convention; or, determining a second frequency domain resource for the terminal to transmit the pilot, and notifying the second frequency domain resource to the terminal through a configuration signaling;

receiving the first uplink shared channel sent by the terminal on the first frequency domain resource, and receiving the pilot frequency of the first uplink shared channel sent by the terminal on the second frequency domain resource;

Optionally, the second frequency domain resource is:

Optionally, the first frequency domain resources corresponding to the multiple first uplink shared channels that share the same frequency domain resource for pilot transmission are included in the second frequency domain resource.

Optionally, the second frequency domain resource is:

and the union set of the first frequency domain resources corresponding to a plurality of first uplink shared channels which share the same symbol position for pilot frequency transmission.

Optionally, the configuration signaling is:

Optionally, the first downlink control channel carries a cyclic shift indication, where the cyclic shift indication is used to provide a cyclic shift value to generate the pilot corresponding to the size of the second frequency domain resource.

a third processing module, configured to determine a first frequency domain resource used for a terminal to transmit a first uplink shared channel, and send a first downlink control channel to the terminal, where the first downlink control channel is used to carry scheduling information of the first uplink shared channel, and the first frequency domain resource is included in the scheduling information;

a fourth processing module, configured to determine, according to a predetermined agreement, a second frequency domain resource for pilot transmission by the terminal; or, determining a second frequency domain resource for the terminal to transmit the pilot, and notifying the second frequency domain resource to the terminal through a configuration signaling;

a first receiving module, configured to receive, on the first frequency domain resource, the first uplink shared channel sent by the terminal, and receive, on the second frequency domain resource, a pilot of the first uplink shared channel sent by the terminal;

Optionally, the second frequency domain resource is:

Optionally, the configuration signaling is:

The technical scheme of the invention has the following beneficial effects:

in the above scheme, the uplink transmission method allocates the second frequency domain resource for transmitting the pilot frequency according to the pre-agreed and/or configured signaling indication, so that the pilot frequencies of the multiple first uplink shared channels sharing the same frequency domain resource for pilot frequency transmission can be aligned after mapping, and orthogonality among the pilot frequencies is ensured, thereby ensuring correct transmission and demodulation of uplink data.

Drawings

Fig. 1 is a schematic diagram of a frame structure 1 used in a frequency division duplex system in the prior art;

fig. 2 is a schematic diagram of a frame structure 2 used in a time division duplex system in the prior art;

fig. 3a is a schematic diagram of a conventional CP pilot structure of a physical uplink shared channel in the prior art;

fig. 3b is a schematic diagram of an extended CP pilot structure of a physical uplink shared channel in the prior art;

fig. 4 is a schematic diagram of the present invention, in which DMRS symbol positions are shared by a plurality of PUSCHs transmitted with a TTI length shorter than 1ms, to destroy orthogonality between DMRSs;

fig. 5 is a flowchart illustrating an uplink transmission method according to a first embodiment of the present invention;

fig. 6 is a flowchart illustrating an uplink transmission method according to a second embodiment of the present invention;

fig. 7 is a diagram illustrating uplink transmission according to a first example of specific application of the embodiment of the present invention;

fig. 8 is a diagram illustrating uplink transmission according to a second example of specific application of the embodiment of the present invention;

fig. 9 is a schematic diagram of uplink transmission of a third example of specific application of the embodiment of the present invention;

fig. 10 is a schematic structural diagram of an uplink transmission device according to a third embodiment of the present invention;

fig. 11 is a schematic structural diagram of an uplink transmission device according to a fifth embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

In view of the fact that the prior art does not relate to a transmission structure shorter than 1ms, the shortened TTI still needs to be transmitted on the transmission structure of 1ms, and in view of the actual transmission situation, the following ideas are proposed:

when the TTI length shorter than 1ms is adopted to transmit the PUSCH, the DMRS structure designed for the subframe of 1ms in the LTE system is reused, namely the DMRS transmission symbol position defined in one subframe in the LTE system is not changed, and a plurality of PUSCHs transmitted by the TTI length shorter than 1ms in the same subframe can share the DMRS symbol position in the LTE system;

however, these multiple PUSCHs have independent scheduling information, their scheduling bandwidths may only partially overlap, and therefore, if their DMRS sequences are generated according to respective scheduling bandwidths and corresponding DMRS Cyclic Shifts (CSs) as defined in the existing mechanism, when mapped onto the same symbol, due to the partial overlapping of the scheduling bandwidths, the DMRS sequences are not aligned, which may destroy the orthogonality between the DMRS sequences mapped onto the same frequency domain resource and corresponding to different PUSCHs, i.e., as shown in fig. 4, the DMRSs transmitted in the dashed-line 1 and dashed-line 2 boxes respectively corresponding to TTI1 and TTI2 only overlap on a partial frequency domain resource, resulting in the destruction of orthogonality, and thus the DMRS base station cannot distinguish the DMRSs of TTI1 and TTI 2. Therefore, a new DMRS generation and mapping scheme needs to be defined to ensure orthogonality between DMRSs corresponding to different data transmissions.

Therefore, the present invention provides the following scheme to solve the problem that the data may not be correctly demodulated after the data transmission due to the absence of an explicit data transmission method after the transmission time interval is shortened.

Example one

As shown in fig. 5, an uplink transmission method provided in an embodiment of the present invention is applied to a terminal, and includes:

step 51: receiving a first downlink control channel, wherein the first downlink control channel is used for bearing scheduling information of a first uplink shared channel, and determining a first frequency domain resource for transmitting the first uplink shared channel according to the scheduling information borne by the first downlink control channel;

step 52: determining a second frequency domain resource for transmitting the pilot frequency according to the indication of the prearranged and/or the configuration signaling;

step 53: transmitting the first uplink shared channel on the first frequency domain resource, and transmitting a pilot of the first uplink shared channel on the second frequency domain resource;

the size of the second frequency domain resource is greater than or equal to the size of the first frequency domain resource, that is, the number of subcarriers included in the second frequency domain resource is greater than or equal to the number of subcarriers included in the first frequency domain resource.

Wherein, the first downlink control channel is used for bearing the uplink scheduling permission of the first uplink shared channel; the TTI length of the first downlink control channel and/or the first uplink shared channel may be less than 1 ms.

The second frequency domain resource may have the following three cases:

first, the second frequency domain resource is: the system uplink transmission bandwidth, or the number of resource blocks contained in the system uplink transmission bandwidth, or the number of subcarriers contained in the system uplink transmission bandwidth, or the number of resource units contained in the system uplink transmission bandwidth;

Second, the second frequency domain resource is: m resource blocks/subcarriers/resource units in the system uplink transmission bandwidth, wherein the second frequency domain resource is smaller than the system uplink transmission bandwidth;

At this time, the base station side is required to ensure that the first frequency domain resources corresponding to the plurality of first uplink shared channels sharing the DMRS frequency domain resources are contained in the second frequency domain resources through scheduling limitation; preferably, the system uplink transmission bandwidth may be divided into several parts in advance, each part includes specific Mi resource blocks PRB/subcarriers SC/resource units, and the operation is performed in each part in the manner described above.

Thirdly, the second frequency domain resource is: and sharing the same frequency domain resource to carry out the union of the first frequency domain resources corresponding to the plurality of first uplink shared channels for pilot frequency transmission.

At this time, the first downlink control channel for scheduling the terminal notifies the terminal of the second frequency domain resource; when the base station generates the first downlink control channel, the base station needs to consider the scheduling bandwidth of other terminals which share the frequency domain resource with the terminal and transmit the DMRS.

The following describes the combination of the pre-agreement and the signaling configuration with the second frequency domain resource:

a first combination method, according to a predetermined convention, for determining a second frequency domain resource for transmitting a pilot, specifically includes:

pre-appointing the second frequency domain resource to be a system uplink transmission bandwidth, or the number of resource blocks included in the system uplink transmission bandwidth, or the number of subcarriers included in the system uplink transmission bandwidth, or the number of resource units included in the system uplink transmission bandwidth, wherein the resource unit is a predefined subcarrier on a symbol, or continuous X2 subcarriers on a symbol, and X2 is a positive integer greater than 0; alternatively, the first and second electrodes may be,

presetting the second frequency domain resource as M resource blocks/subcarriers/resource units in a system uplink transmission bandwidth, wherein the second frequency domain resource is smaller than the system uplink transmission bandwidth, and the M resource blocks/subcarriers/resource units are continuous or discontinuous in the frequency domain; alternatively, the first and second electrodes may be,

and pre-appointing the second frequency domain resource to be a union set of the first frequency domain resources corresponding to a plurality of first uplink shared channels which share the same frequency domain resource for pilot frequency transmission.

A second combination manner, determining a second frequency domain resource for transmitting a pilot according to the indication of the configuration signaling, specifically including:

the configuration signaling indicates one of a plurality of predefined or configured second frequency domain resources; wherein the predefined or configured plurality of second frequency domain resources comprises: a second frequency domain resource is a system uplink transmission bandwidth, or the number of resource blocks included in the system uplink transmission bandwidth, or the number of subcarriers included in the system uplink transmission bandwidth, or the number of resource units included in the system uplink transmission bandwidth, where the resource unit is a predefined subcarrier on a symbol, or continuous X2 subcarriers on a symbol, X2 is a positive integer greater than 0, the remaining second frequency domain resources are M resource blocks/subcarriers/resource units in the system uplink transmission bandwidth, and the second frequency domain resource is smaller than the system uplink transmission bandwidth, where the M resource blocks/subcarriers/resource units are continuous or discontinuous in a frequency domain, and M is one or more values; alternatively, the first and second electrodes may be,

the predefined or configured plurality of second frequency domain resources comprises: m resource blocks/subcarriers/resource units in a system uplink transmission bandwidth, and the second frequency domain resource is smaller than the system uplink transmission bandwidth, wherein the M resource blocks/subcarriers/resource units are continuous or discontinuous in a frequency domain, and M is a plurality of values; alternatively, the first and second electrodes may be,

the configuration signaling directly indicates a second frequency domain resource, and the second frequency domain resource is a union of first frequency domain resources corresponding to a plurality of first uplink shared channels which share the same frequency domain resource for pilot frequency transmission.

A third combination manner, determining a second frequency domain resource for transmitting the pilot frequency according to the predetermined agreement and the indication of the configuration signaling, specifically including:

the configuration signaling indicates first frequency domain resources corresponding to other first uplink shared channels which share the same frequency domain resources with the first uplink shared channel for pilot transmission, the second frequency domain resources are pre-agreed to be a union of the first frequency domain resources corresponding to a plurality of first uplink shared channels which share the same frequency domain resources for pilot transmission, and the second frequency domain resources are determined to be a union of the first frequency domain resources and the first frequency domain resources corresponding to the other uplink shared channels according to the pre-agreement.

Specifically, the configuration signaling is: a higher layer signaling or an indication field in the first downlink control channel. The indication field here is different from the indication field for indicating the first frequency domain resource in the first downlink control channel.

Further, before transmitting the pilot on the second frequency domain resource, the uplink transmission method further includes: acquiring a cyclic shift indication carried in the first downlink control channel; determining a cyclic shift value of the pilot according to the cyclic shift indication, generating the pilot corresponding to the size of the second frequency domain resource according to the cyclic shift value.

As can be seen from the above, in the uplink transmission method provided in the first embodiment of the present invention, the second frequency domain resource for transmitting the pilot is allocated according to the pre-agreed and/or the indication of the configuration signaling, so that the pilots of the multiple first uplink shared channels sharing the same frequency domain resource for pilot transmission can be aligned after mapping, and orthogonality between the pilots is ensured, thereby ensuring correct transmission and demodulation of uplink data.

Example two

To better describe the uplink transmission method, as shown in fig. 6, a second embodiment of the present invention describes the uplink transmission method from a base station side, and specifically, the uplink transmission method includes:

step 61: determining a first frequency domain resource for a terminal to transmit a first uplink shared channel, and sending a first downlink control channel to the terminal, wherein the first downlink control channel is used for carrying scheduling information of the first uplink shared channel, and the first frequency domain resource is contained in the scheduling information;

step 62: determining a second frequency domain resource for the terminal to transmit the pilot frequency according to a predetermined convention; or, determining a second frequency domain resource for the terminal to transmit the pilot, and notifying the second frequency domain resource to the terminal through a configuration signaling;

and step 63: receiving the first uplink shared channel sent by the terminal on the first frequency domain resource, and receiving the pilot frequency of the first uplink shared channel sent by the terminal on the second frequency domain resource;

The step 62 of determining the second frequency domain resource for the terminal to transmit the pilot and notifying the terminal of the second frequency domain resource through the configuration signaling may be: determining second frequency domain resources for a terminal to transmit pilot frequency according to first frequency domain resources corresponding to a plurality of first uplink shared channels which are locally configured or share the same frequency domain resources for pilot frequency transmission; and generating a configuration signaling according to the second frequency domain resource and sending the configuration signaling to the terminal.

The second frequency domain resource may have the following three cases:

At this time, bandwidth scheduling needs to be limited, and first frequency domain resources corresponding to a plurality of first uplink shared channels sharing the same frequency domain resource for pilot transmission are included in the second frequency domain resource.

Thirdly, the second frequency domain resource is: and the union set of the first frequency domain resources corresponding to a plurality of first uplink shared channels which share the same symbol position for pilot frequency transmission.

The combination of the pre-agreement and the signaling configuration with the second frequency domain resource may refer to the related contents in the first embodiment, and will not be described herein again.

Further, the first downlink control channel carries a cyclic shift indication, where the cyclic shift indication is used to provide a cyclic shift value to generate the pilot corresponding to the size of the second frequency domain resource.

As can be seen from the above, the uplink transmission method provided in the second embodiment of the present invention can ensure orthogonal transmission of DMRSs of multiple first uplink shared channels that share DMRS resources while frequency domain resources of data transmission are different by adjusting DMRS transmission bandwidths, thereby ensuring correct transmission and demodulation of uplink data.

The uplink transmission method of the present invention is described below with reference to several specific examples:

first, it is stated that the resource unit in the present invention is defined as one subcarrier, i.e., RE, on one symbol, or as X2 REs/SC, RU for short, which are consecutive in the frequency domain on one symbol, and X2 is a positive integer greater than 0.

First example

Presetting that DMRS is transmitted according to the size of uplink transmission bandwidth of a system no matter how large actual frequency domain resources for data transmission scheduled by a terminal are;

as shown in fig. 7, taking two TTIs with a length of 4 symbols sharing the same DMRS, and taking a system uplink bandwidth of 20MHz as an example, the system uplink bandwidth is assumed to include 100 PRBs, i.e., subcarrier numbers of 0 to 1199 or RU numbers of 0 to 99 (with RU as a unit, each RU is assumed to include 12 SCs, defined from the minimum SC side, beginning with RU0, the following is the same);

the frequency domain resources occupied by the data transmission indicated by the scheduling signaling of terminal 1 are subcarriers 12 to 35 or RUs 1 to RU2, and the frequency domain resources occupied by the data transmission scheduled by the scheduling signaling of terminal 2 are subcarriers 24 to 59 or RUs 2 to RU4, then: the terminal 1 transmits data information on subcarriers 12-35 or RUs 1-RU 2, transmits DMRS of the terminal on the length of a system bandwidth, namely subcarriers 0-1199 or RUs 0-RU 99, and the DMRS is obtained by performing cyclic shift of CS (circuit switched) 0 on a base sequence of the DMRS; the terminal 2 transmits data information on subcarriers 24-59 or RU 2-RU 4, transmits DMRS of the terminal on the length of a system bandwidth, namely subcarriers 0-1199 or RU 0-RU 99, and the DMRS is obtained by performing cyclic shift of CS (circuit switched) to 3 on a base sequence of the DMRS; since the DMRS sequences of the two terminals have the same length and the mapping positions are completely the same, the base station may separate the DMRSs of the terminal 1 and the terminal 2 mapped on the same resource by using the corresponding cyclic shift.

Second example

No matter how large the actual frequency domain resource for data transmission scheduled by the terminal is, the DMRS is transmitted according to the size of the part of the resource of the uplink transmission bandwidth of the prearranged or configured system;

as shown in fig. 8, taking two TTIs with a length of 4 symbols sharing the same DMRS, and taking a system uplink bandwidth of 20MHz as an example, the system uplink bandwidth is assumed to include 100 PRBs, i.e., subcarrier numbers of 0 to 1199 or RU numbers of 0 to 99 (with RU as a unit, each RU is assumed to include 12 SCs, defined from the minimum SC side, beginning with RU0, the following is the same);

assuming that DMRSs of the terminal 1 and the terminal 2 are agreed or configured to be in subcarriers 0 to 119 or RU0 to RU9, frequency domain resources occupied by data transmission indicated by the scheduling signaling of the terminal 1 are subcarriers 12 to 35 or RU1 to RU2, and frequency domain resources occupied by data transmission scheduled by the scheduling signaling of the terminal 2 are subcarriers 24 to 59 or RU2 to RU4, then: the terminal 1 transmits data information on subcarriers 12-35 or RUs 1-RU 2, and transmits DMRS on subcarriers 0-119 or RUs 0-RU 9, wherein the DMRS is obtained by performing CS-0 cyclic shift on a DMRS base sequence; the terminal 2 transmits data information on subcarriers 24-59 or RU 2-RU 4, and transmits DMRS on subcarriers 0-119 or RU 0-RU 9, wherein the DMRS is obtained by performing CS (cyclic shift of 3) on a base sequence of the DMRS; because the DMRS sequences of the two terminals have the same length and the mapping positions are completely the same, the base station side may separate the DMRSs of the terminal 1 and the terminal 2 mapped on the same resource by using the corresponding cyclic shift; at this time, when the base station schedules terminals 1 and 2, the data transmission bandwidth of the base station cannot be out of subcarriers 0 to 119 or RUs 0 to 9.

Third example

as shown in fig. 9, taking two TTIs with a length of 4 symbols sharing the same DMRS, and taking a system uplink bandwidth of 20MHz as an example, the system uplink bandwidth is assumed to include 100 PRBs, i.e., subcarrier numbers of 0 to 1199 or RU numbers of 0 to 99 (with RU as a unit, each RU is assumed to include 12 SCs, defined from the minimum SC side, beginning with RU0, the following is the same);

the frequency domain resources occupied by data transmission indicated by the scheduling signaling of the terminal 1 are subcarriers 12 to 35 or RUs 1 to RU2, the frequency domain resources occupied by the data transmission scheduled by the scheduling signaling of the terminal 2 are subcarriers 24 to 59 or RUs 2 to RU4, the scheduling signaling of the terminal 1 and the terminal 2 further comprises an indication domain indicating that the DMRSs of the two terminals are transmitted in the subcarriers 12 to 59 or RUs 1 to RU4, and then: the terminal 1 transmits data information on subcarriers 12-35 or RUs 1-RU 2, transmits DMRS on the subcarriers 12-59 or RUs 1-RU 4, and the DMRS is obtained by performing CS (cyclic shift of 0) on a base sequence of the DMRS; the terminal 2 transmits data information on subcarriers 24-59 or RUs 2-RU 4, transmits DMRS on subcarriers 12-59 or RUs 1-RU 4, and the DMRS is obtained by performing CS-3 cyclic shift on a base sequence of the DMRS; since the DMRS sequences of the two terminals have the same length and the mapping positions are completely the same, the base station may separate the DMRSs of the terminal 1 and the terminal 2 mapped on the same resource by using the corresponding cyclic shift.

In summary, the scheme provided by the present invention ensures orthogonal transmission of DMRSs of multiple first uplink shared channels that share DMRS resources while frequency domain resources of data transmission are different by adjusting DMRS transmission bandwidths, thereby ensuring correct transmission and demodulation of uplink data.

The scheme provided by the invention is as follows: when different UL (UpLink) TTIs share the same symbol position and are used as DMRSs, the DMRSs of the different UL TTIs are generated and transmitted according to a specific length on a frequency domain, and the data is transmitted according to the size of actually scheduled frequency domain resources.

EXAMPLE III

As shown in fig. 10, an uplink transmission apparatus provided in the third embodiment of the present invention is applied to a terminal, and includes:

a first processing module 101, configured to receive a first downlink control channel, where the first downlink control channel is used to carry scheduling information of a first uplink shared channel, and determine, according to the scheduling information carried by the first downlink control channel, a first frequency domain resource used for transmitting the first uplink shared channel;

a first determining module 102, configured to determine, according to an indication of a predetermined and/or configured signaling, a second frequency domain resource for transmitting a pilot;

a first transmission module 103, configured to transmit the first uplink shared channel on the first frequency domain resource, and transmit a pilot of the first uplink shared channel on the second frequency domain resource;

The second frequency domain resource may have the following three cases:

Further, the uplink transmission apparatus further includes: a first obtaining module, configured to obtain, by the first transmitting module, a cyclic shift indication carried in the first downlink control channel before the pilot is transmitted on the second frequency-domain resource; a second processing module, configured to determine a cyclic shift value of the pilot according to the cyclic shift indication, and generate the pilot corresponding to the size of the second frequency domain resource according to the cyclic shift value.

As can be seen from the above, the uplink transmission apparatus provided in the third embodiment of the present invention allocates the second frequency domain resource for transmitting the pilot frequency according to the pre-agreed and/or the indication of the configuration signaling, so that the pilot frequencies of the multiple first uplink shared channels sharing the same frequency domain resource for pilot frequency transmission can be aligned after mapping, and orthogonality between the pilot frequencies is ensured, thereby ensuring correct transmission and demodulation of the uplink data.

It should be noted that the uplink transmission device provided in the third embodiment of the present invention is an uplink transmission device corresponding to the uplink transmission method provided in the first embodiment of the present invention, so that all the embodiments of the uplink transmission method provided in the first embodiment of the present invention are applicable to the uplink transmission device, and can achieve the same or similar beneficial effects.

Example four

In order to better achieve the above object, a fourth embodiment of the present invention further provides an uplink transmission apparatus, including: a processor; and the memory is connected with the processor through a bus interface, the memory is used for storing programs and data used by the processor in executing operation, and when the processor calls and executes the programs and data stored in the memory, the following functional modules are realized:

It should be noted that the uplink transmission device provided in the fourth embodiment of the present invention is an uplink transmission device corresponding to the uplink transmission method provided in the first embodiment of the present invention, so that all the embodiments of the uplink transmission method provided in the first embodiment of the present invention are applicable to the uplink transmission device, and can achieve the same or similar beneficial effects.

EXAMPLE five

In order to better achieve the above object, as shown in fig. 11, a fifth embodiment of the present invention further provides an uplink transmission apparatus, including:

a third processing module 111, configured to determine a first frequency domain resource used for a terminal to transmit a first uplink shared channel, and send a first downlink control channel to the terminal, where the first downlink control channel is used to carry scheduling information of the first uplink shared channel, and the first frequency domain resource is included in the scheduling information;

a fourth processing module 112, configured to determine, according to a predetermined convention, a second frequency domain resource used for the terminal to transmit the pilot; or, determining a second frequency domain resource for the terminal to transmit the pilot, and notifying the second frequency domain resource to the terminal through a configuration signaling;

a first receiving module 113, configured to receive the first uplink shared channel sent by the terminal on the first frequency domain resource, and receive a pilot of the first uplink shared channel sent by the terminal on the second frequency domain resource;

The operation of the fourth processing module 112 to "determine the second frequency domain resource for the terminal to transmit the pilot, and notify the terminal of the second frequency domain resource through the configuration signaling" may specifically be: determining second frequency domain resources for a terminal to transmit pilot frequency according to first frequency domain resources corresponding to a plurality of first uplink shared channels which are locally configured or share the same frequency domain resources for pilot frequency transmission; and generating a configuration signaling according to the second frequency domain resource and sending the configuration signaling to the terminal.

The second frequency domain resource may have the following three cases:

As can be seen from the above, the uplink transmission apparatus provided in the fifth embodiment of the present invention can ensure orthogonal transmission of DMRSs of multiple first uplink shared channels that share DMRS resources while frequency domain resources of data transmission are different by adjusting DMRS transmission bandwidths, thereby ensuring correct transmission and demodulation of uplink data.

It should be noted that the uplink transmission apparatus provided in the fifth embodiment of the present invention is an uplink transmission apparatus corresponding to the uplink transmission method on the base station side provided in the second embodiment, so that all the embodiments of the uplink transmission method provided in the second embodiment are applicable to the uplink transmission apparatus, and can achieve the same or similar beneficial effects.

EXAMPLE six

In order to better achieve the above object, a sixth embodiment of the present invention further provides an uplink transmission apparatus, including: a processor; and the memory is connected with the processor through a bus interface, the memory is used for storing programs and data used by the processor in executing operation, and when the processor calls and executes the programs and data stored in the memory, the following functional modules are realized:

It should be noted that the uplink transmission device provided in the sixth embodiment of the present invention is an uplink transmission device corresponding to the uplink transmission method on the base station side provided in the second embodiment, so that all the embodiments of the uplink transmission method provided in the second embodiment are applicable to the uplink transmission device, and can achieve the same or similar beneficial effects.

Many of the functional units described in this specification have been referred to herein as modules/sub-modules in order to more particularly emphasize their implementation independence.

In embodiments of the invention, the modules/sub-modules may be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be constructed as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different bits which, when joined logically together, comprise the module and achieve the stated purpose for the module.

Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Likewise, operational data may be identified within the modules and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network.

When a module can be implemented by software, considering the level of existing hardware technology, a module implemented by software may build a corresponding hardware circuit to implement a corresponding function, without considering cost, and the hardware circuit may include a conventional Very Large Scale Integration (VLSI) circuit or a gate array and an existing semiconductor such as a logic chip, a transistor, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.

While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. An uplink transmission method, comprising:

2. The uplink transmission method of claim 1, wherein the second frequency domain resource is:

3. The uplink transmission method of claim 1, wherein the second frequency domain resource is:

4. The uplink transmission method of claim 1, wherein the second frequency domain resource is:

5. The uplink transmission method according to any of claims 1 to 4, wherein the configuration signaling is:

6. The uplink transmission method of claim 1, wherein prior to transmitting the pilot on the second frequency-domain resource, the uplink transmission method further comprises:

7. An uplink transmission apparatus, comprising:

8. The uplink transmission apparatus of claim 7, wherein the second frequency domain resource is:

9. The uplink transmission apparatus of claim 7, wherein the second frequency domain resource is:

10. The uplink transmission apparatus of claim 7, wherein the second frequency domain resource is:

11. The uplink transmission apparatus according to any of claims 7 to 10, wherein the configuration signaling is:

12. The uplink transmission apparatus according to claim 7, wherein the uplink transmission apparatus further comprises:

13. An uplink transmission method, comprising:

14. The uplink transmission method of claim 13, wherein the second frequency domain resource is:

15. The uplink transmission method of claim 13, wherein the second frequency domain resource is:

16. The uplink transmission method according to claim 15, wherein the first frequency domain resources corresponding to the plurality of first uplink shared channels sharing the same frequency domain resource for pilot transmission are included in the second frequency domain resource.

17. The uplink transmission method of claim 13, wherein the second frequency domain resource is:

18. The uplink transmission method according to any of claims 13 to 17, wherein the configuration signaling is:

19. The uplink transmission method of claim 13, wherein the first downlink control channel carries a cyclic shift indication, and wherein the cyclic shift indication is used to provide a cyclic shift value for generating the pilot corresponding to the size of the second frequency-domain resource.

20. An uplink transmission apparatus, comprising:

21. The uplink transmission apparatus of claim 20, wherein the second frequency domain resource is:

22. The uplink transmission apparatus of claim 20, wherein the second frequency domain resource is:

23. The uplink transmission apparatus according to claim 22, wherein the first frequency domain resources corresponding to the plurality of first uplink shared channels sharing the same frequency domain resource for pilot transmission are included in the second frequency domain resource.

24. The uplink transmission apparatus of claim 20, wherein the second frequency domain resource is:

25. The uplink transmission apparatus according to any of claims 20 to 24, wherein the configuration signaling is:

26. The uplink transmission apparatus of claim 20, wherein the first downlink control channel carries a cyclic shift indication, and wherein the cyclic shift indication is used to provide a cyclic shift value for generating the pilot corresponding to the size of the second frequency domain resource.