Method to transfer probing reference signal in upperlink at duplex mode with time-division channelling

FIELD: information technologies.

SUBSTANCE: method is described to transfer a probing reference signal in an upperlink at duplex mode with time-division channelling, where a terminal calculates parameters of resources for transfer of a SRS signal in a time slot UpPTS in compliance with the information on configuration related to the SRS signal in the upperlink. Above parameters contain the initial position of resources in the frequency area, and then the SRS signal is transmitted using resources; at the same time, when the initial position is calculated in the frequency area of resources, the index of the first subcarrier should be identified in the maximum throughput capacity of SRS. The terminal determines the above index with the help of the position in the frequency area of one or more channels of random access, i.e. PRACH channels in the UpPTS time slot. When the PRACH channel includes subcarriers at the lower border of the system throughput capacity, the upper border of the system throughput capacity is applied as the final position of the maximum throughput capacity of SRS, and the initial position of the maximum throughput capacity of SRS is calculated. When the PRACH channels include subcarriers at the upper border of the system throughput capacity, the lower border of the system throughput capacity is applied as the initial position of the maximum throughput capacity of SRS, and then the above index is determined by adding the initial position of the maximum throughput capacity plus the offset parameter configured for the terminal.

EFFECT: making it possible to probe channels for high throughput capacities.

12 cl, 14 dwg, 6 tbl

 

The technical field

This invention relates to a system duplex mode with a time division multiplexing (TDD), in particular to a method for transmitting sounding reference signal in the uplink channel when the TDD system.

The level of technology

Structure frame in the TDD mode of the LTE system (the so-called structure of the second frame type, frame structure type 2) shown in figure 1. In this structure, radiogram duration of 10 MS (307200 Ts, 1 ms=30720 Ts) is divided into two poluvreme with the same duration, 5 MS (153600 Ts). Each PolyGram includes five subframes with duration of 1 MS. The function of each subframe shown in table 1, where D denotes the downward subframe for transmitting downstream signals, a U - upward subframe for transmitting upstream signals. In addition, ascending or descending from subframe is divided into two timeslot with a duration of 0.5 MS. S is a special subframe, which includes three special timeslot: timeslot DwPTS (Downlink Pilot Time Slot), guard interval GP (Guard Period) and timeslot UpPTS (Uplink Pilot Time Slot). In a practical system, the index is ascending-descending configuration is transmitted to mobile phones via radio.

Configuration
Table 1
Ascending-descending configuration
Switch-point periodicitySubrame numher
0123456789
05 msDSUUUDSUUU
15 msDSUUDDSUUD
25 msDSUDDD SUDD
310 msDSUUUDDDDD
410 msDSUUDDDDDD
510 msDSUDDDDDDD
65 msDSUUU DSUUD

The design of the physical random access channel (PRACH, Physical Random Access Channel) in the LTE system is shown in figure 2. The preamble consists of two parts: a cyclic prefix (CP) and sequence (Sequence), and different formats of the preamble (preamble format) mean different lengths of CF and/or Sequence. The preamble formats supported TDD mode of the current LTE system, shown in table 2.

Table 2
The format of the preamble
Preamble formatTCPTSEQ
03168·Ts24576·Ts
121024·Ts24576·Ts
26240·Ts2·24576·Ts
321024·Ts2·24576·Ts
4 (frame structure type 2 only)448·Ts4096·T

Among the above formats preamble formats preamble, numbered from 0 to 3 are transmitted in the usual ascending subframe, and the format of the preamble 4 is transmitted in the UpPTS timeslot.

The format of the preamble of 0 is passed in the usual ascending subframe;

The format of the preamble 1, 2 is transmitted in two normal ascending subframe respectively;

The format of the preamble 3 is transmitted in three normal ascending subframe;

The format of the preamble 4 is transmitted in the UpPTS timeslot (the initial position of this format is transmitted on 5158 Ts from the end of the UpPTS timeslot).

In the LTE system resources are allocated to resource blocks (RB Resource Block), each of which has twelve resource elements (RE) in the frequency domain and one timeslot in the time domain, i.e. seven (standard cyclic prefixes, Normal cyclic prefix) or six (extended cyclic prefix Extended cyclic prefix) characters SC-OFDM. If you define the total number of resource blocks, which corresponds to the bandwidth of the ascending systems in the frequency domain asthen the RB index isand the index of subcarriers (or RE Resource Element) is,- the number of subcarriers corresponding to the resource block in the frequency domain.

In the frequency domain channel PRACH occupies prop the SKN ability, which correspond to the six resource blocks, i.e. seventy-two element resource Element), the bandwidth of each is 15 kHz. The PRACH channels with the same position in the time domain differ in the frequency domain.

The UpPTS timeslot TDD system can be used to transmit a sounding reference signal (Sounding Reference Signal, SRS) in an upward channel and channel PRACH format is preamble 4.

Displaying the frequency domain transmission channels PRACH in the UpPTS uses an alternative method, one-sided display, i.e. in a UpPTS timeslot is a mapping exists from low-frequency to high frequency, and in the UpPTS timeslot from treble to bass. The formula for the mapping is expressed in the following form:

wheredenotes the index of the first RB in the channel PRACH;is the starting position in the frequency domain channel PRACH;- total number of RB, which corresponds to the configuration of the bandwidth of the ascending system; fRA- the index in the frequency domain of the PRACH channels with the same position in the time domain; nf- number of radioframe, NSPthe number of switching points downward transfer upward in radioframe what littelest 10 MS. denotes the distribution within the first and second poluvreme of radioframe respectively. In the UpPTS timeslot you can have many channels PRACH, which are continuous in the frequency domain.

The bandwidth of the signal SRS is configured using a tree structure. Each configuration SRS bandwidth corresponds to the tree structure, thus, the bandwidth of the SRS (SRS-Bandwidth) at the highest level corresponds to the maximum throughput for this configuration, the bandwidth of the SRS. Tables numbered from 3 to 6, give the configuration of the SRS bandwidth at different scales bandwidth uplink, where mSRS,bindicates the number of RB, which correspond to the bandwidth relative to the bandwidth of the SRS at the level of the index b in the tree structure; Nbmeans the number of switching nodes at the level of the index b nodes contained at the level of the index b-1 in the tree structure; b=0 corresponds to the first level of the tree structure, i.e. the highest level; mSRS,0is the maximum throughput in this configuration. N/A indicates that at this level there is a corresponding switching node.

Take the configuration of the SRS bandwidth 1 in table 3 as an example, where b=0 is ballyorgan, and the corresponding bandwidth of the SRS at this level is bandwidth capabilities, which correspond to 32 RB, which is the maximum throughput for this configuration, the bandwidth of the SRS; b=1 represents the second level, and the corresponding bandwidth of the SRS at this level is bandwidth capabilities, which correspond to the 16 RB, besides bandwidth SRS previous level is divided into 2 bandwidth of the second level; b=2 is a third level, and the corresponding bandwidth of the SRS at this level is bandwidth capabilities, which correspond to 8 RB, besides bandwidth SRS previous level is divided into 2 bandwidth of the third level; b=3 is a fourth level, and the corresponding bandwidth of the SRS at this level is bandwidth capabilities, which correspond to the 4 RB, besides bandwidth SRS previous level is divided into 2 bandwidth fourth level.

In addition, in the same frequency range SRS subcarriers signal SRS are placed at intervals, as shown in figure 4, and this Grebneva structure allows large customers to transmit a signal SRS for the same SRS bandwidth.

In UpPTS, when using the maximum bandwidth SRS signal SRS, this maximum throughputcan be calculated by the following expression (i.e. not used bandwidth, which corresponds to b=0 in tab., numbered from 3 to 6).

whereis the number of RB, which correspond to the bandwidth of the ascending system; NRA- number of channels PRACH in the UpPTS timeslot; α2α3α5non - negative integers. This expression means that the choice of values for α2α3α5turns out the maximum bandwidth SRS satisfying the inequality.

When the signal transmission SRS SRS bandwidth in different levels of the tree structure are in the scale of the frequency range, where the maximum bandwidth SRS, besides their relative position within the maximum bandwidth may change. Therefore, to resolve a conflict situation, where the signal SRS in the UpPTS is an obstacle to the PRACH channel, and the ability of sensing channels for larger capacities, you R the national post the position in the frequency domain, the maximum bandwidth of the signal SRS in the UpPTS.

Disclosure of inventions

This invention will solve this technical problem by providing a method of transmitting a sounding reference signal in the uplink of the TDD system. In this way the obtained position of the transmission maximum bandwidth SRS in the UpPTS will allow that the UpPTS signal does not interfere with the channel PRACH, moreover, that large bandwidth have the opportunity sensing channels.

To solve the aforementioned problems, the invention provides a method of transmitting a sounding reference signal in the uplink channel when duplex time division channels, where the terminal calculates the resource settings for the signal transmission of the SRS in the UpPTS timeslot (uplink pilot time slot) in accordance with the configuration information associated with the signal SRS uplink. The above parameters contain the original position of resources in the frequency domain, and then the signal SRS is transmitted using resources; however, when calculated original position in the frequency domain resources, you must define the index of the first sub-carrier in the maximum SRS bandwidth.

The method is characterized by the fact that the terminal determines the above index by using the position in the frequency domain one or many channels random access, i.e. channels PRACH in the UpPTS timeslot. To the GDS channel PRACH includes subcarriers at the lower limit of the bandwidth of the system, apply the upper bound of the throughput of the system as the end position of the maximum SRS bandwidth and calculates the start position of the maximum SRS bandwidth. When the PRACH channels include subcarriers at the upper limit of the bandwidth of the system, apply the lower bound of the throughput of the system as the initial position of the maximum SRS bandwidth, and then the above index is determined by adding the initial position of the maximum throughput plus the offset parameter configured for the terminal.

To solve the aforementioned problems, the invention provides another method of transmitting a sounding reference signal in the uplink channel when duplex time division channels, where the terminal calculates the resource settings for the signal transmission of the SRS in the UpPTS timeslot (uplink pilot time slot) in accordance with the configuration information associated with the signal SRS uplink. The above parameters contain the original position of resources in the frequency domain, and then the signal SRS is transmitted using resources; however, when calculated original position in the frequency domain resources, you must define the index of the first subcarrier k0in the maximum bandwidth SRS mSRS.

Way across the tsya fact, because of the above, the terminal calculates the index k0according to the following formula:

where- total number of RB, which corresponds to the configuration of the bandwidth of the ascending system; mSRS- the number of resource blocks, which corresponds to the maximum bandwidth SRS;denotes the number of subcarriers of the resource block in the frequency domain; kTC∈{0, 1} is the offset parameter configured for the terminal; nf- system number of radioframe, which is located above the UpPTS timeslot; NSPis the number of switching points downward transfer upward in radioframe;when the above UpPTS is in the first poluvreme of radioframe andwhen the UpPTS is in the second poluvreme of radioframe.

To solve the aforementioned problems, the invention provides another method of transmitting a sounding reference signal in the uplink channel when duplex time division channels, where the terminal calculates the resource settings for the signal transmission of the SRS in the UpPTS timeslot (uplink pilot time slot) in accordance with the configuration information associated with the signal SRS uplink. The above parameters contain iskhodno the position of resources in the frequency domain, and then the signal SRS is transmitted using resources; including, when computing the original position in the frequency domain resources, you must define the index of the first sub-carrier in the maximum SRS bandwidth.

The method is characterized by the fact that the terminal determines the above index by using the position in the frequency domain one or many channels random access, i.e. channels PRACH in the UpPTS timeslot. First fixed maximum bandwidth SRS in the middle of residual frequency range derived from the fact that the bandwidth of the ascending system minus the frequency range occupied by the PRACH channels, and calculates the start position of the maximum SRS bandwidth. Then the above index is determined by adding the initial position of the maximum throughput plus the offset parameter configured for the terminal.

To solve the aforementioned problems, the invention provides another method of transmitting a sounding reference signal in the uplink channel when duplex time division channels, where the terminal calculates the resource settings for the signal transmission of the SRS in the UpPTS timeslot (uplink pilot time slot) in accordance with the configuration information associated with the signal SRS uplink. The above parameters contain shadowpool resources in the frequency domain, and then the signal SRS is transmitted using resources; including, when computing the original position in the frequency domain resources, you must define the index of the first subcarrier k0in the maximum bandwidth SRS mSRS.

The method is characterized by the fact that the above, the terminal calculates the index k0according to the following formula:

where- total number of RB, which corresponds to the configuration of the bandwidth of the ascending system; mSRS- the number of resource blocks, which corresponds to the maximum bandwidth SRS;denotes the number of subcarriers of the resource block in the frequency domain; kTC∈{0, 1} is the offset parameter configured for the terminal; nf- system number of radioframe, which is located above the UpPTS timeslot; NSPis the number of switching points downward transfer upward in radioframe;when the above UpPTS is in the first poluvreme of radioframe andwhen the UpPTS is in the second poluvreme of radioframe.

To solve the aforementioned problems, the invention provides another method of transmitting a sounding reference signal in the uplink channel in full-duplex mode with the belt separation channels, where the terminal calculates the resource settings for the signal transmission of the SRS in the UpPTS timeslot (uplink pilot time slot) in accordance with the configuration information associated with the signal SRS uplink. The above parameters contain the original position of resources in the frequency domain, and then the signal SRS is transmitted using resources; however, when calculated original position in the frequency domain resources, you must define the index of the first sub-carrier in the maximum SRS bandwidth.

The method is characterized by the fact that the terminal determines the above index by using the position in the frequency domain one or many channels random access, i.e. channels PRACH in the UpPTS timeslot. When the PRACH channel includes subcarriers at the lower limit of the bandwidth of the system, apply the upper bound of the throughput of the system as the end position of the maximum SRS bandwidth and calculates the start position of the maximum SRS bandwidth. When the PRACH channels include subcarriers at the upper limit of the bandwidth of the system, apply the lower bound of the throughput of the system as the initial position of the maximum SRS bandwidth, and then the above index is determined by adding the initial position of the maximum throughput plus PA is Amer offset, configured for the terminal.

To solve the aforementioned problems, the invention provides another method of transmitting a sounding reference signal in the uplink channel when duplex time division channels, where the terminal calculates the resource settings for the signal transmission of the SRS in the UpPTS timeslot (uplink pilot time slot) in accordance with the configuration information associated with the signal SRS uplink. The above parameters contain the original position of resources in the frequency domain, and then the signal SRS is transmitted using resources; however, when calculated original position in the frequency domain resources, you must define the index of the first subcarrier k0in the maximum bandwidth SRS mSRS.

The method is characterized by the fact that the above, the terminal calculates the index k0according to the following formula:

where NRAindicates the number of PRACH channels in the foregoing, the UpPTS timeslot;- the number of subcarriers of the resource block in the frequency domain; kTC∈{0, 1} is the offset parameter configured for the terminal; nf- system number of radioframe, which is located above the UpPTS timeslot; NSPis the number of switching points downward transfer upward in radioframe; when the above UpPTS is in the first poluvreme of radioframe andwhen the UpPTS is in the second poluvreme of radioframe.

Further, in the above transfer methods this terminal can calculate the maximum bandwidth SRS mSRSone of the three following options:

in the first variant, the terminal calculates the above maximum bandwidth SRS mSRSaccording to the following formula:

where NRAindicates the number of channels random access in the UpPTS timeslot, i.e. channels PRACH; α2α3α5are nonnegative integers; mSRS,0- bandwidth SRS first level by recomputation on the choice of α2α3α5; mSRS- maximum bandwidth SRS obtained by choosing α2α3α5when a condition is met; NRAis the number of channels PRACH in the foregoing, the UpPTS timeslot;

in the second variant, the terminal calculates the above maximum bandwidth SRS mSRSaccording to the formulawhere NRAis the number of channels random access in the UpPTS timeslot, i.e. channels PRACH;

according to a third variant, the terminal determines propuso the ability SRS first level of the tree structure m SRS,0which corresponds to the configuration of bandwidth as the maximum bandwidth SRS mSRS.

Further, when configured bandwidth SRS is located on the first level of the tree structure configurations SRS bandwidth, the terminal calculates the above maximum bandwidth SRS mSRSon the first or second method; and when the bandwidth of the SRS is not there, then calculated the foregoing, the maximum bandwidth SRS mSRSby the third method.

The present invention obtained the position of the maximum transmission bandwidth in the UpPTS timeslot allows that the UpPTS signal does not interfere with the channels PRACH. Further, due to the fact that the bandwidth used by the signal SRS, widely distributed in the frequency domain, when the PRACH channels are located in different positions, which enables the sensing channels for large capacities.

Brief description of drawings

The following figures are used to provide a better understanding of the present invention and are a part of this application. Examples of embodiments of the present invention and their descriptions are used to explain the present invention and do not contain any improper Ogre is the restrictions of the present invention. On the attached drawings:

Figure 1 - Scheme of the frame in the TDD mode of the LTE system;

Figure 2 - Scheme of channels PRACH;

Figure 3 - diagram of the tree structure of SRS bandwidth;

4 is a Diagram grabdevice patterns of signal SRS;

Figa and 5B is a Schematic of the initial position of the maximum throughput when displaying sent from treble to bass, PRACH channels in system capacity and when they are displayed, sent from low-frequency to high frequency, respectively, in example 1 the implementation of this invention;

Figa and 6B is a Schematic of the initial position of the maximum throughput when displaying sent from treble to bass, PRACH channels in system capacity and when they are displayed, sent from low-frequency to high frequency, respectively, in example 2, the implementation of this invention;

Figa and 7B is a Schematic of the initial position of the maximum throughput when displaying sent from treble to bass, PRACH channels in system capacity and when they are displayed, sent from low-frequency to high frequency, respectively, in example 3, the implementation of this invention;

Figa and 8B Scheme began the Noi position of the maximum bandwidth of the display, sent from treble to bass, PRACH channels in system capacity and when they are displayed, sent from low-frequency to high frequency, respectively, in example 4, the implementation of this invention;

Figa and 9V - Circuit the starting position of the maximum throughput when displaying sent from treble to bass, PRACH channels in system capacity and when they are displayed, sent from low-frequency to high frequency, respectively, in example 5, the implementation of this invention;

The foregoing Figure 4 and subsequent figuresdenotes a range where used by the terminal subcarriers in the bandwidth of the SRS when kTC=1;

denotes a range where used by the terminal subcarriers in the bandwidth of the SRS when kTC=0.

The implementation of the invention

Further, the present invention is described with reference to the attached drawings and options for implementation. This invention takes the LTE system for example, but is not limited to this. It can be used in other TDD systems.

The first example implementation

When sending signal SRS terminal (so-called subscriber equipment (UE) in an LTE system) calc is sleet the resource settings for the signal transmission of the SRS in the UpPTS timeslot in accordance with the configuration information, associated with the signal SRS uplink. The above parameters contain the original position of resources in the frequency domain, and then the signal SRS is transmitted using resources; however, when calculated original position in the frequency domain resources, you must define the index of the first sub-carrier in the maximum SRS bandwidth.

Optionally, receiving the signal from SRS terminal for sensing the ascending channel, the base station allocates resources in the UpPTS signal (SRS distributed bandwidth SRS are located in the frequency domain continuous) and transmits the terminal configuration information associated with distributed resources, as the number of levels in the corresponding tree structure of a distributed terminal throughput SRS. And this information is included in the above configuration information associated with the signal SRS. After receiving configuration information associated with the signal SRS, the terminal calculates the resource settings for the signal transmission of the SRS, including the relevant parameters with a time scope, frequency, scope, and uses the sequence. Among the parameters associated with the frequency region, the present invention pays attention to the initial position in the frequency domain of the first sub-carrier in the maximum throughput methods for the particular SRS, i.e. its index, because the distributed base station bandwidth SRS at different levels of the tree structure are in the frequency range where the maximum bandwidth of the signal SRS and the relative position of the SRS bandwidth at each level in the maximum SRS bandwidth is determined by the received terminal corresponding configuration settings. Thus, the index of the first sub-carrier in the maximum SRS bandwidth, the terminal calculates the start position in the frequency domain resources for signal transmission SRS. The specific algorithm you can watch in this standard.

It should be noted that in this document the parameters in formulas and special settings for certain Cell-specific parameters) can be obtained by broadcasting, and special settings for the terminal (UE-specific parameters) can be allocated with signals at a high level, and even some parameters are calculated from the other parameters. Receiving any of the above settings, refer to the relevant standards.

In this example implementation, the terminal determines the above index in accordance with the position in the frequency domain one or many channels random access, i.e. channels PRACH in the UpPTS timeslot. When the PRACH channels

hold the display on throughput when osobnosti system, directed from low-frequency to high-frequency (one or many continuous channels PRACH in the UpPTS as a whole should include subcarriers at the lower limit of the bandwidth of the system), the upper bound of the throughput of the system (subcarriers in the higher frequency range) is defined as the ending position of the maximum SRS bandwidth and calculates the start position of the maximum SRS bandwidth. When the PRACH channels

spend the display directed away from the high-frequency range to the low-frequency (in UpPTS one or many continuous channels PRACH as a whole should include subcarriers at the upper limit of the bandwidth of the system), the lower bound of the throughput of the system (subcarriers in a lower frequency range) is defined as the initial position of the maximum SRS bandwidth. Then define the index of the first sub-carrier in the maximum SRS bandwidth by adding the initial position of the maximum throughput plus the offset parameter configured for the terminal.

Below is the formula by which the terminal calculates the index of the first subcarrier k0in the maximum SRS bandwidth, i.e. subcarrier with minimal index:

where - total number of RB, which corresponds to the configuration of the bandwidth of the ascending system; mSRS- the number of resource blocks, which corresponds to the maximum bandwidth SRS;denotes the number of subcarriers of the resource block in the frequency domain; kTC∈{0, 1} is the offset parameter configured for the terminal, i.e. the starting point grabdevice structure; nf- system number of radioframe, which is located above the UpPTS timeslot; NSPis the number of switching points downward transfer upward in radioframe;when the above UpPTS is in the first poluvreme of radioframe,when the UpPTS is in the second poluvreme of radioframe.

In addition, in the formula indicates otherwise case

.

The terminal may determine the above maximum bandwidth SRS in the following way:

In this example implementation, when a distributed bandwidth SRS is located on the first level of the tree structure configuration SRS bandwidth, is calculated above the bandwidth of the SRS mSRSaccording to the following formula:

where NRAindicates the number of channels random access time is a lot UpPTS, ie PRACH channels; α2α3α5are nonnegative integers; mSRS,0- bandwidth SRS first level by recomputation on the choice of α2α3α5; mSRS- maximum bandwidth SRS obtained by choosing α2α3α5when this condition is satisfied; NRAis the number of channels PRACH in the foregoing, the UpPTS timeslot.

When distributed bandwidth SRS is not located on the first level of the tree structure configuration SRS bandwidth is determined by the maximum bandwidth SRS on the first level of the tree structure of mSRS,0as above, the maximum throughput mSRSthen there is mSRS=mSRS,0. Or calculated maximum bandwidth SRS according to the formula.

In another variant implementation, you can choose one of the above three ways of calculating the maximum bandwidth SRS.

The second example implementation

This example implementation is mainly the similarity of content with the first example, and differs according to the method of calculating the index of the first sub-carrier in the maximum SRS bandwidth. In this example, the terminal determines the above-mentioned index p is the power position in the frequency domain one or many channels random access, ie PRACH channels in the UpPTS timeslot. First fixed maximum bandwidth SRS in the middle of residual frequency range, obtained by subtraction of the bandwidth of the ascending system frequency range occupied by the PRACH channels, and calculates the start position of the maximum SRS bandwidth. Then the above index is determined by adding the initial position of the maximum throughput plus the offset parameter configured for the terminal.

Below is the formula by which the terminal calculates the index of the first sub-carrier in the maximum SRS bandwidth k0:

where- total number of RB, which corresponds to the configuration of the bandwidth of the ascending system; mSRS- the number of resource blocks, which corresponds to the maximum bandwidth SRS; NRAis the number of channels PRACH in the foregoing, the UpPTS timeslot;denotes the number of subcarriers of the resource block in the frequency domain; kTC∈{0, 1} is the offset parameter configured for the terminal; nf- system number of radioframe, which is located above the UpPTS timeslot; NSPis the number of switching points downward transfer upward in happy is frame; when the above UpPTS is in the first poluvreme of radioframe andwhen the UpPTS is in the second poluvreme of radioframe.

The terminal determines the above bandwidth SRS in the same way that it is applied, as in the first example implementation.

The third example implementation

This example implementation is mainly the similarity of content with the first example, varies according to the method of calculating the index of the first sub-carrier in the maximum SRS bandwidth. In this example, the terminal determines the above index by using the position in the frequency domain one or many channels random access, i.e. channels PRACH in the UpPTS timeslot. When the PRACH channel includes subcarriers at the lower limit of the bandwidth of the system, applies the first subcarriers after the above channel PRACH as the initial position of the maximum SRS bandwidth. When the PRACH channels include subcarriers upper bound of the throughput of the system, apply the lower bound of the throughput of the system as the initial position of the maximum SRS bandwidth, and then the above index is determined by adding the initial position of the maximum throughput plus the offset parameter, konfigurieren the th terminal.

Below is the formula by which the terminal calculates the index of the first sub-carrier in the maximum SRS bandwidth k0:

where NRAis the number of channels PRACH in the foregoing, the UpPTS timeslot;denotes the number of subcarriers of the resource block in the frequency domain; kTC∈{0, 1} is the offset parameter configured for the terminal; nf- system number of radioframe, which is located above the UpPTS timeslot; NSPis the number of switching points downward transfer upward in radioframe;when the above UpPTS is in the first poluvreme of radioframe andwhen the UpPTS is in the second poluvreme of radioframe.

The terminal determines the above bandwidth SRS in the same way that it is applied, as in the first example implementation.

Below are some examples of conduct description of the method of the present invention.

An example of application of method 1

Conditions:

The number of RB, which correspond to the bandwidth of the ascending system, is.

Configuration ascending-descending timeslots in the TDD system is 1, then radioframe the number of transition points nished the overall trend upward is obtained as N SP=2.

The number of channels PRACH in the UpPTS timeslot is obtained as NRA=1.

Usingcalculates the maximum bandwidth SRS, then mSRS=18 (α2=1, α3=1, α5=0)

kTC=0.

Here, according to the method described in example 1, is calculated initial position of the maximum SRS bandwidth:

When the PRACH channels conduct mapping exists from frequency to low frequency in the bandwidth of the system (i.e. when the conditionthe initial position of the maximum SRS bandwidth is at the lower limit of the frequency range of the system. The index of the subcarrier initial position in the frequency domain maximum bandwidth SRS is obtained as k0=kTC=0.

When the PRACH channels conduct mapping exists from low-frequency to high frequency in the bandwidth of the system (i.e. when the conditionthe initial position of the maximum SRS bandwidth is at the upper end of the frequency range of the system. The index of the subcarrier initial position in the frequency domain maximum bandwidth SRS produces:

When the above two cases, the position of the maxima is Inoi bandwidth SRS shown in Figa and 5B, respectively.

An example of application of method 2

Conditions:

The number of RB, which correspond to the bandwidth of the ascending system, is

Configuration ascending-descending timeslots in the TDD system is 1, then radioframe the number of switching points downward transfer upward is obtained as NSP=2.

The number of channels PRACH in the UpPTS timeslot is obtained as NRA=1.

Using configuration bandwidth SRS 4 in table 1 is the maximum bandwidth mSRS=mSRS,0=16.

kTC=1.

Here, using the method described in example 1, is calculated initial position of the maximum SRS bandwidth:

When the PRACH channels conduct mapping exists from frequency to low frequency in the bandwidth of the system (i.e. when the conditionthe initial position of the maximum SRS bandwidth is at the lower limit of the frequency range of the system. The index of the subcarrier initial position in the frequency domain maximum bandwidth SRS is obtained as k0=kTC=1.

When the PRACH channels conduct mapping exists from low-frequency to high frequency in the bandwidth of the system (i.e. when the condition is and the initial position of the maximum SRS bandwidth is at the upper end of the frequency range of the system. The index of the subcarrier initial position in the frequency domain maximum bandwidth SRS is obtained as.

When the above two cases, the position of the maximum SRS bandwidth shown in Figa and 6B, respectively.

An example of application of method 3

Conditions:

The number of RB, which correspond to the bandwidth of the ascending system, is

Configuration ascending-descending timeslots in the TDD system is 1, then radioframe the number of switching points downward transfer upward is obtained as NSP=2.

The number of channels PRACH in the UpPTS timeslot is obtained as NRA=1.

Using configuration bandwidth SRS 4 in table 1 is the maximum bandwidth mSRS=mSRS,0=16.

kTC=1.

Here, using the method described in example 2 implementation calculates the start position of the maximum SRS bandwidth: the maximum bandwidth SRS is in the middle of residual frequency range, obtained by subtraction of the bandwidth of the ascending system frequency range, busy is th channels PRACH.

When the PRACH channels conduct mapping exists from frequency to low frequency in the bandwidth of the system (i.e. when the conditionthe index of the subcarrier initial position in the frequency domain maximum bandwidth SRS is obtained as

When the PRACH channels conduct mapping exists from low-frequency to high frequency in the bandwidth of the system (i.e. when the conditionthe index of the subcarrier initial position in the frequency domain maximum bandwidth SRS is obtained as

When the above two cases, the position of the maximum SRS bandwidth shown in Figa and 7B, respectively.

An example of application of method 4

Conditions:

The number of RB, which correspond to the bandwidth of the ascending system, is

Configuration ascending-descending timeslots in the TDD system is 1, then radioframe the number of switching points downward transfer upward is obtained as NSP=2.

The number of channels PRACH in the UpPTS timeslot is obtained as NRA=1.

Using configuration bandwidth SRS 4 in table 1 is the maximum productdatabase m SRS=mSRS,0=16.

kTC=1.

Here, using the method described in the example of implementation 3 calculates the start position of the maximum SRS bandwidth.

When the PRACH channels conduct mapping exists from frequency to low frequency in the bandwidth of the system (i.e. when the conditionthe initial position of the maximum SRS bandwidth is at the lower limit of the frequency range of the system. The index of the subcarrier initial position in the frequency domain maximum bandwidth SRS is obtained as k0=kTC=1.

When the PRACH channels conduct mapping exists from frequency to low frequency in the bandwidth of the system (i.e. when the conditionthe maximum throughput is approximately the frequency range occupied by the PRACH channels, i.e. the initial position of the maximum SRS bandwidth is close to the upper limit of bandwidth occupied by the PRACH channels, then the index of the subcarrier initial position in the frequency domain maximum bandwidth SRS

When the above two cases, the position of the maximum SRS bandwidth shown in Figa and 8B, respectively.

An example application of the method 5

Conditions:

The number of RB, which correspond to the bandwidth of the ascending system, is

Configuration ascending-descending timeslots in the TDD system is 1, then radioframe the number of switching points downward transfer upward is obtained as NSP=2.

The number of channels PRACH in the UpPTS timeslot is obtained as NRA=1.

According to the formulacalculates the maximum bandwidth SRS mSRS=19.

kTC=1.

Here, according to the method described in example 1, is calculated initial position of the maximum SRS bandwidth:

When the PRACH channels conduct mapping exists from frequency to low frequency in the bandwidth of the system (i.e. when the conditionthe initial position of the maximum SRS bandwidth is at the lower limit of the frequency range of the system. The index of the subcarrier initial position in the frequency domain maximum bandwidth SRS is obtained as k0=kTC=1.

When the PRACH channels conduct mapping exists from low-frequency to high frequency in the bandwidth of the system (i.e. when the conditionthe initial position of the maximum flow capable of being the STI SRS is at the upper end of the frequency range of the system. The index of the subcarrier initial position in the frequency domain maximum bandwidth SRS is obtained as

When the above two cases, the position of the maximum SRS bandwidth shown in Figa and 9B, respectively.

The above descriptions are only preferred embodiments of the present invention and not used for limiting the present invention. The person skilled in the art may make many variations and modifications of the present invention. Any modifications, equivalent substitutions, improvements etc. made without deviating from the essence and principles of the present invention, are included in the scope of legal protection of the present invention.

Industrial applicability

This invention provides a method of transmitting a sounding reference signal in the uplink of the TDD system, which received the position of the maximum transmission bandwidth of the SRS in the UpPTS allows that the UpPTS signal does not interfere with the channel PRACH, moreover, that enables sensing channels for large capacities.

1. The method of sending a sounding reference signal (SRS) in an upward channel in full duplex time division channels, where the terminal calculates the resource settings for the transmission is ignal SRS in the UpPTS timeslot in accordance with the configuration information, associated with the signal SRS in the uplink, moreover, these parameters contain the original position of resources in the frequency domain, and then the signal SRS is transmitted using a resource, in this case, when computing the original position in the frequency domain resources, you must define the index of the first sub-carrier in the maximum SRS bandwidth, characterized in that the terminal determines the specified index position in the frequency domain one or many channels random access, i.e. channels PRACH in the UpPTS timeslot, when the channel PRACH includes subcarriers at the lower limit of the bandwidth of the system, apply the upper bound throughput system as the ultimate position of the maximum SRS bandwidth and calculates the start position of the maximum SRS bandwidth; when the PRACH channels include subcarriers upper bound of the throughput of the system, apply the lower bound of the throughput of the system as the initial position of the maximum SRS bandwidth, and then the specified index is determined by adding the initial position of the maximum throughput plus the offset parameter configured for the terminal.

2. The mode of transmission of sounding reference signal in the uplink channel in full-duplex mode with a time section is the group of channels, where the terminal calculates the resource settings for the signal transmission of the SRS in the UpPTS timeslot in accordance with the configuration information associated with the signal SRS in the uplink, moreover, these parameters contain the original position of resources in the frequency domain, and then the signal SRS is transmitted using resources, including, when computing the original position in the frequency domain resources, you must define the index of the first subcarrier k0in the maximum bandwidth SRS mSRS, characterized in that the terminal calculates the index k0according to the following formula

whereindicates the number of channels in the specified PRACH timeslot UpPTS; mSRSis the number of resource blocks, which correspond to the maximum bandwidth SRS;- the number of subcarriers of the resource block in the frequency domain; kCU∈{0, 1} is the offset parameter configured for the terminal; nf- system number of radioframe, which is specified in the UpPTS timeslot; NSPis the number of switching points downward transfer upward in radioframe;when the UpPTS is in the first poluvreme of radioframe andwhen the UpPTS is the second poluvreme of radioframe.

3. The method according to claim 2, characterized in that the terminal can calculate the maximum bandwidth SRS mSRSone of the three following options:
in the first embodiment, the terminal calculates the specified maximum bandwidth SRS mSRSaccording to the following formula

where NRAindicates the number of channels random access in the UpPTS timeslot, i.e. channels PRACH; α2α3α5are nonnegative integers; mSRS, 0 - throughput SRS first level by recomputation on the choice of α2α3α5; mSRS- maximum bandwidth SRS obtained by choosing α2α3α5when a condition is met; NRAis the number of channels in the specified PRACH timeslot UpPTS;
according to the second variant, the terminal calculates the specified maximum bandwidth SRS mSRSaccording to the formulawhere NRAis the number of channels random access in the UpPTS timeslot, i.e. channels PRACH;
by the third variant, the terminal determines the bandwidth of the SRS of the first level of the tree structure mSRS,0which corresponds to the configuration of bandwidth as the maximum bandwidth SRS mSRS.

4. The method according to claim 3, characterized in that, when configured bandwidth SRS is located on the first level of the tree structure configurations SRS bandwidth, the terminal calculates the specified maximum bandwidth SRS mSRSon the first or second method; and when the bandwidth of the SRS is not there, then calculates the specified maximum bandwidth SRS mSRSby the third method.

5. The method of sending a sounding reference signal (SRS) in an upward channel in full duplex time division channels, where the terminal calculates the resource settings for the signal transmission of the SRS in the UpPTS timeslot in accordance with the configuration information associated with the signal SRS in the uplink, moreover, these parameters contain the original position of resources in the frequency domain, and then the signal SRS is transmitted using resources, including, when computing the original position in the frequency domain resources, you must define the index of the first sub-carrier in the maximum SRS bandwidth, characterized in that the terminal determines the specified index using the position in the frequency domain one or many channels random access, i.e. channels PRACH in the UpPTS timeslot, the first fixed maximum bandwidth SRS in the middle of residual frequency range, derived from the fact that the bandwidth of the ascending system minus the frequency range occupied by the PRACH channels, and calculates the start position of the maximum SRS bandwidth; then the specified index is determined by adding the initial position of the maximum throughput plus the offset parameter configured for the terminal.

6. The mode of transmission of sounding reference signal in the uplink channel when duplex time division channels, where the terminal calculates the resource settings for the signal transmission of the SRS in the UpPTS timeslot in accordance with the configuration information associated with the signal SRS in the uplink, moreover, these parameters contain the original position of resources in the frequency domain, and then the signal SRS is transmitted using resources, including, when computing the original position in the frequency domain resources, you must define the index of the first subcarrier k0in the maximum bandwidth SRS mSRS, characterized in that the terminal calculates the index k0according to the following formula

whereindicates the number of channels in the specified PRACH timeslot UpPTS; mSRSis the number of resource blocks, which correspond to the maximum bandwidth SRS; - the number of subcarriers of the resource block in the frequency domain; kCU∈{0, 1} is the offset parameter configured for the terminal; nf- system number of radioframe, which is specified in the UpPTS timeslot; NSPis the number of switching points downward transfer upward in radioframe;when the UpPTS is in the first poluvreme of radioframe, awhen the UpPTS is in the second poluvreme of radioframe.

7. The method according to claim 6, characterized in that the terminal can calculate the maximum bandwidth SRS mSRSone of the three following options:
in the first embodiment, the terminal calculates the specified maximum bandwidth SRS mSRSaccording to the following formula

where NRAindicates the number of channels random access in the UpPTS timeslot, i.e. channels PRACH; α2α3α5are nonnegative integers; mSRS,0- bandwidth SRS first level by recomputation on the choice of α2α3α5; mSRS- maximum bandwidth SRS obtained by choosing α2α3α5when a condition is met; NRAis the number of channels PRACH in asanam the UpPTS timeslot;
according to the second variant, the terminal calculates the specified maximum bandwidth SRS mSRSaccording to the formulawhere NRAis the number of channels random access in the UpPTS timeslot, i.e. channels PRACH;
by the third variant, the terminal determines the bandwidth of the SRS of the first level of the tree structure mSRS,0which corresponds to the configuration of bandwidth as the maximum bandwidth SRS mSRS.

8. The method according to claim 7, characterized in that, when configured bandwidth SRS is located on the first level of the tree structure configurations SRS bandwidth, the terminal calculates the specified maximum bandwidth SRS mSRSon the first or second method; and when the bandwidth of the SRS is not there, then calculates the specified maximum bandwidth SRS mSRSby the third method.

9. The method of sending a sounding reference signal (SRS) in an upward channel in full duplex time division channels, where the terminal calculates the resource settings for the signal transmission of the SRS in the UpPTS timeslot in accordance with the configuration information associated with the signal SRS in the uplink, moreover, these parameters contain the original position resources in cha is totoy region, and then the signal SRS is transmitted using resources; including, when computing the original position in the frequency domain resources, you must define the index of the first sub-carrier in the maximum SRS bandwidth, characterized in that the terminal determines the specified index position in the frequency domain one or many channels random access, i.e. channels PRACH in the UpPTS timeslot, when the channel PRACH includes subcarriers at the lower limit of the bandwidth of the system, applies the first subcarriers after the specified PRACH channel as the initial position of the maximum SRS bandwidth; when the PRACH channels include subcarriers upper bound throughput capacity of the system, apply the lower bound of the throughput of the system as the initial position of the maximum SRS bandwidth, and then the specified index is determined by adding the initial position of the maximum throughput plus the offset parameter configured for the terminal.

10. The mode of transmission of sounding reference signal in the uplink channel when duplex time division channels, where the terminal calculates the resource settings for the signal transmission of the SRS in the UpPTS timeslot in accordance with the configuration information associated with the signal SRS in the uplink, and the above paragraph is the parameters contain the original position of resources in the frequency domain, and then the signal SRS is transmitted using resources, including, when computing the original position in the frequency domain resources, you must define the index of the first subcarrier k0in the maximum bandwidth SRS mSRS, characterized in that the terminal calculates the index k0according to the following formula

where NRAindicates the number of channels in the specified PRACH timeslot UpPTS; mSRSis the number of resource blocks, which correspond to the maximum bandwidth SRS;- the number of subcarriers of the resource block in the frequency domain; kCU∈{0, 1} is the offset parameter configured for the terminal; nf- system number of radioframe, which is specified in the UpPTS timeslot; NSPis the number of switching points downward transfer upward in radioframe;when the UpPTS is in the first poluvreme of radioframe, awhen the UpPTS is in the second poluvreme of radioframe.

11. The method according to claim 10, characterized in that the terminal can calculate the maximum bandwidth SRS mSRSone of the following three ways:
by the first method, the terminal calculates the specified maximum bandwidth is sposobnosti SRS m SRSaccording to the following formula

where NRAindicates the number of channels random access in the UpPTS timeslot, i.e. channels PRACH; α2α3α5are nonnegative integers; mSRS,0- bandwidth SRS first level by recomputation on the choice of α2α3α5; mSRS- maximum bandwidth SRS obtained by choosing α2α3α5when a condition is met; NRAis the number of channels in the specified PRACH timeslot UpPTS;
in the second method, the terminal calculates the specified maximum bandwidth SRS mSRSaccording to the formulawhere NRAis the number of channels random access in the UpPTS timeslot, i.e. channels PRACH;
by the third method, the terminal determines the bandwidth of the SRS of the first level of the tree structure mSRS,0which corresponds to the configuration of bandwidth as the maximum bandwidth SRS mSRS.

12. The method according to claim 11, characterized in that, when configured bandwidth SRS is located on the first level of the tree structure configurations SRS bandwidth, the terminal calculates the specified maximum bandwidth SRS mSRS on the first or second method; and when the bandwidth of the SRS is not there, then calculates the specified maximum bandwidth SRS mSRSby the third method.



 

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