CN104734760A

CN104734760A - Method, device and system for processing downlink wave beam index

Info

Publication number: CN104734760A
Application number: CN201310714657.XA
Authority: CN
Inventors: 郭森宝; 郁光辉; 鲁照华
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2013-12-20
Filing date: 2013-12-20
Publication date: 2015-06-24
Also published as: WO2015090061A1

Abstract

The invention discloses a method, device and system for processing a downlink wave beam index. A base station indirectly indicates the downlink wave beam index required to be fed back through at least one of wave beam indicating modes and related configuration information when informing a terminal to send an uplink access signal in a preset mode and/or through system information; the downlink wave beam index fed back is indicated through a time domain position of the uplink access signal; the downlink wave beam index fed back is indicated through a frequency domain position of the uplink access signal; the downlink wave beam index fed back is indicated through an uplink access signal sequence; the downlink wave beam index fed back is indicated by adding index indication bit information to the uplink access signal; the downlink wave beam index fed back is indicated by adding a wave beam recognition sequence to the uplink access signal, wherein the downlink wave beam index corresponds to the downlink signal sent through wave beams.

Description

Method, device and system for realizing downlink beam index processing

Technical Field

The present invention relates to a Long term evolution Advanced system (LTE-Advanced) in the field of communications, and in particular, to a method, an apparatus, and a system for implementing downlink beam index processing.

Background

In high frequency communication, since a higher carrier frequency is used for transmission, the average path loss is much larger than that of the conventional LTE system, for example, a carrier frequency of 28GHz is used for transmission, and the formula is used:

the average proportion information of the high-frequency path loss value and the LTE path loss value is calculated as follows:

in high frequency communication, in order to ensure coverage, i.e., the receiving side meets the minimum SINR requirement, it is necessary to increase the transmission and receiver gains.

Wherein, R is the radius covered by the cell, lambda is the wavelength of the corresponding carrier wave, G_tFor transmitting antenna gain, G_rIs the receive antenna gain.

The LTE communication demand is highest to cover an area of 100km, and if only the average path loss (open area) is considered according to the highest coverage, the high-frequency communication may be highest to cover an area of 1 km. If the characteristics of high air absorption (oxygen absorption, rain fading, fog fading and the like) and sensitivity to shadow fading and the like of the actual high-frequency carrier wave are considered, the coverage which can be actually supported is less than 1 km.

If the high-frequency communication supports the maximum coverage of 1km, compared with the LTE system, the SINR ratio which can be obtained in the same coverage area is different, the signal-to-noise ratio of the former is reduced by at least 20dB compared with that of the latter, and in order to ensure that the high-frequency communication has approximate SINR within the coverage area of the LTE system, the antenna gain of the high-frequency communication needs to be ensured. It is worth to be fortunate here that since the high frequency communication has a shorter wavelength, it can be ensured that more antenna elements are accommodated per unit area, and more antenna elements can provide a higher antenna gain, thereby ensuring the coverage performance of the high frequency communication.

More antenna elements means that the coverage of high frequency communication can be guaranteed in a beamforming manner. As known from the previous design concept of LTE, to obtain a good beamforming effect, it is necessary to accurately obtain the state information of the channel, so as to obtain the beamforming weights from the state information of the channel. And a better beamforming weight is obtained, for a base station as a transmitting end, a terminal as a receiving end needs to feed back downlink channel state information or a weight, and for the receiving end, the transmitting end needs to feed back uplink channel state information or a weight, so that the base station can transmit downlink services by using an optimal beam, and the terminal can also transmit uplink services by using the optimal beam. There is a problem in that: before the base station obtains the weight, the base station cannot cover the receiving end by using the optimal beam, so that the receiving end cannot measure the reference signal sent by the base station, or even if the base station covers the terminal, the terminal cannot reach the same coverage of the base station, the feedback content cannot be obtained by the base station, and therefore the selection and normal communication of the beam weight cannot be performed.

Disclosure of Invention

In view of this, the main objective of the present invention is to provide a method, an apparatus, and a system for implementing downlink beam index processing, so as to ensure reliable transmission of subsequent downlink control information.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a method for realizing downlink beam index processing comprises the following steps:

the base station adopts at least one of the following beam indication modes and related configuration information to indirectly indicate the downlink beam index needing to be fed back when the base station informs that the uplink access signal is sent through a predefined mode and/or system information:

indicating the fed-back downlink beam index by adopting the time domain position of the uplink access signal;

indicating the fed-back downlink beam index by adopting the frequency domain position of the uplink access signal;

indicating the fed-back downlink beam index by adopting an uplink access signal sequence;

adding index indication bit information to indicate the fed-back downlink beam index after the uplink access signal;

adding a beam identification sequence to indicate a fed-back downlink beam index after an uplink access signal;

the downlink beam index is a beam index corresponding to a downlink signal transmitted by using a beam.

In a predefined manner, the base station obtains the fed-back downlink beam index through at least one of the following beam identification manners:

detecting an uplink access signal of a predefined time domain position;

detecting an uplink access signal of a predefined frequency domain position;

detecting a code sequence adopted by an uplink access signal according to a predefined uplink access signal sequence set;

detecting downlink wave beam index indication bit information carried by an uplink access signal;

the beam identification sequence is detected after the uplink access signal.

The method further comprises the following steps:

and the base station detects the uplink access signal in a predefined mode according to the beam identification mode.

And the base station informs the adopted beam indication mode in a system message configuration mode.

The base station utilizes the system information sent by S wave beams to carry N wave beam indication mode configuration information, wherein S is greater than 0, and N is greater than 0.

The method further comprises the following steps:

when the base station utilizes the time domain position of the uplink access signal to identify the fed-back downlink beam index, the base station adds the corresponding relation between the time domain position of the uplink access signal and the downlink beam index into the system message in a system message configuration mode.

The method further comprises the following steps:

when the base station utilizes the frequency domain position of the uplink access signal to identify the fed-back downlink beam index, the base station adds the corresponding relation between the frequency domain position of the uplink access signal and the downlink beam index into the system message in a system message configuration mode.

The method further comprises the following steps:

when the base station utilizes the uplink access signal sequence to identify the fed back downlink beam index, the base station adds the corresponding relation between the uplink access signal sequence set and the downlink beam index into the system message in a system message configuration mode, wherein one uplink access signal sequence set at least comprises one uplink access signal sequence.

the terminal acquires that at least one of the following beam indication modes and related configuration information are adopted to feed back downlink beam indexes by using the uplink discovery signal through a predefined mode and/or receiving system information:

indicating a downlink beam index fed back by a terminal by adopting a time domain position for sending an uplink access signal;

indicating a downlink beam index fed back by a terminal by adopting a frequency domain position for sending an uplink access signal;

indicating a downlink beam index fed back by the terminal by adopting which uplink access signal sequence set the uplink access signal sequence belongs to;

adding index indication bit information after the uplink access signal to indicate a downlink beam index fed back by the terminal;

indicating a downlink beam index fed back by the terminal by an identification sequence after the uplink access signal;

the downlink beam index refers to a beam index corresponding to an optimal downlink beam signal selected by receiving the downlink signal according to a specific rule.

And in a predefined mode, the terminal carries the fed-back downlink beam index information through at least one of the following beam indication modes:

sending an uplink access signal at a predefined time domain position;

sending an uplink access signal at a predefined frequency domain position;

adopting a predefined uplink access signal sequence set, and selecting one or more sequences in the predefined set to transmit uplink access signals;

carrying bit information indicating downlink beam index when sending uplink access signals;

when the uplink access signal is transmitted, the beam identification sequence is transmitted to indicate the feedback of the downlink beam index.

The method further comprises the following steps:

the terminal adopts a predefined mode to obtain a beam indication mode.

And the terminal obtains a beam indication mode by receiving system message configuration.

The method further comprises the following steps:

when the terminal feeds back the downlink beam index by using the time domain position, the terminal obtains the corresponding relation between the time domain position and the downlink beam index in the system message by adopting a mode of receiving the configuration of the system message.

The method further comprises the following steps:

when the terminal feeds back the downlink beam index by using the frequency domain position, the terminal obtains the corresponding relation between the frequency domain position and the downlink beam index in the system message by adopting a mode of receiving the system message configuration.

The method further comprises the following steps:

when the terminal feeds back the downlink beam index by using the uplink access signal sequence, the terminal obtains the corresponding relation between the uplink access signal sequence set and the downlink beam index in the system message by adopting a mode of receiving the configuration of the system message, wherein one uplink access signal sequence set at least comprises one uplink access signal sequence.

A device for realizing downlink beam index processing is a base station; the base station is configured to:

when the uplink access signal is sent, the downlink beam index which needs to be fed back is indirectly indicated by adopting at least one of the following beam indication modes and related configuration information through a predefined mode and/or system information notification:

the downlink beam index refers to a beam index corresponding to a downlink signal transmitted by using a beam.

In a predefined manner, the base station is configured to obtain the fed-back downlink beam index through at least one of the following beam identification manners:

detecting an uplink access signal of a predefined time domain position;

detecting an uplink access signal of a predefined frequency domain position;

detecting feedback downlink beam index indication bit information carried by an uplink access signal;

the beam identification sequence is detected after the uplink access signal.

The base station is further configured to:

and detecting the uplink access signal in a predefined mode according to the beam identification mode.

The base station is used for informing the adopted beam indication mode by adopting a system message configuration mode.

The base station is used for carrying N kinds of beam indication mode configuration information by using a system message sent by S kinds of beams, wherein S is greater than 0, and N is greater than 0.

When the base station identifies the fed-back downlink beam index by using the time domain position of the uplink access signal, the base station is configured to add the corresponding relationship between the time domain position of the uplink access signal and the downlink beam index in the system message by using the system message configuration mode.

The method further comprises the following steps:

when the base station identifies the fed-back downlink beam index by using the frequency domain position of the uplink access signal, the base station is configured to add the corresponding relationship between the frequency domain position of the uplink access signal and the downlink beam index in the system message in a system message configuration manner.

The method further comprises the following steps:

when the base station identifies the fed-back downlink beam index by using the uplink access signal sequence, the base station is configured to add a corresponding relationship between an uplink access signal sequence set and the downlink beam index in the system message by using a system message configuration mode, wherein one uplink access signal sequence set at least comprises one uplink access signal sequence.

A device for realizing downlink beam index processing is a terminal; the terminal is used for:

obtaining, by a predefined method and/or receiving system information, that at least one of the following beam indication methods and related configuration information are used to feed back downlink beam indexes by using an uplink discovery signal:

In a predefined manner, the terminal is configured to carry the fed-back downlink beam index information in at least one of the following beam indication manners:

sending an uplink access signal at a predefined time domain position;

sending an uplink access signal at a predefined frequency domain position;

The terminal is further configured to:

and obtaining a beam indication mode in a predefined mode.

The terminal is used for obtaining a beam indication mode through receiving system message configuration.

When the terminal feeds back the downlink beam index by using the time domain position, the terminal is used for obtaining the corresponding relation between the time domain position and the downlink beam index in the system message by adopting a mode of receiving the configuration of the system message.

When the terminal feeds back the downlink beam index by using the frequency domain position, the terminal is used for obtaining the corresponding relation between the frequency domain position and the downlink beam index in the system message by adopting a mode of receiving the configuration of the system message.

When a terminal feeds back a downlink beam index by using an uplink access signal sequence, the terminal is used for obtaining a corresponding relation between an uplink access signal sequence set and the downlink beam index in a system message by adopting a mode of receiving system message configuration, wherein one uplink access signal sequence set at least comprises one uplink access signal sequence.

A system for realizing downlink beam index processing comprises a base station and a terminal; wherein,

the base station is configured to:

the terminal is used for:

indicating the fed-back downlink beam index by adopting the time domain position for sending the uplink access signal;

indicating the fed-back downlink beam index by adopting the frequency domain position for sending the uplink access signal;

adopting an uplink access signal sequence to which uplink access signal sequence set to indicate a fed-back downlink beam index, wherein one uplink access signal sequence set at least comprises one uplink access signal sequence;

indicating the fed-back downlink beam index by the identification sequence after the uplink access signal;

The invention can ensure the reliable transmission of the subsequent downlink control information.

Drawings

FIG. 1 is a schematic diagram illustrating a principle of indicating a beam index by using a time domain position according to an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating a principle of indicating a beam index by using a frequency domain position according to an embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating a principle of jointly indicating a beam index using time domain and frequency domain positions according to an embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating a principle of indicating a beam index by using a time-domain and frequency-domain position joint sequence set according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating a principle of indicating a beam index by using additional zone indication information of an uplink access signal according to an embodiment of the present invention;

fig. 6 is a schematic diagram illustrating a principle of implementing downlink beam index processing according to an embodiment of the present invention.

Detailed Description

In practical applications, a discovery process may be applied, and the base station and the terminal may discover each other through the discovery process, so as to perform communication using the optimal weight.

The discovery process can be regarded as a training process, and the transmitting end sends a plurality of downlink beam sequences (discovery signals) in advance, so that the receiving end can detect the sequences and further obtain and feed back downlink beam indexes. The beam index selected by the terminal can be an index corresponding to the optimal beam from the base station to the terminal, and the terminal can ensure the reliability and the optimal transmission performance of data transmission from the base station to the terminal by feeding back the index. After the terminal finishes feeding back the beam index, the base station may select an optimal beam by using the beam index to transmit downlink data to the terminal.

The rule definition method of the specific rule is many, and for example, a definition method of the optimal signal quality, a definition method of the optimal signal power, or the like may be used.

On the base station side, the base station may notify the terminal, through a predefined manner and/or system information, to indirectly indicate a downlink beam index that needs to be fed back by using at least one of the following beam indication manners and related configuration information when transmitting an uplink access signal:

the downlink beam index refers to a beam index corresponding to an optimal downlink beam signal selected by the terminal through the downlink signal.

Through a predefined mode, the base station can obtain the downlink beam index fed back by the terminal through at least one of the following beam identification modes:

detecting an uplink access signal of a predefined time domain position;

detecting an uplink access signal of a predefined frequency domain position;

the beam identification sequence is detected after the uplink access signal.

The base station can detect the uplink access signal according to the beam identification mode by adopting a predefined mode.

The base station may notify the terminal of the beam indication mode in a system message configuration mode.

The base station can utilize the system message sent by S kinds of wave beams to carry N kinds of wave beam indication mode configuration information, wherein S >0, and N > 0.

When the base station identifies the downlink beam index fed back by the terminal by using the time domain position of the uplink access signal, the base station can add the corresponding relationship between the time domain position of the uplink access signal and the downlink beam index into the system message in a system message configuration mode.

When the base station identifies the downlink beam index fed back by the terminal by using the frequency domain position of the uplink access signal, the base station may add the corresponding relationship between the frequency domain position of the uplink access signal and the downlink beam index in the system message by using the configuration mode of the system message.

When the base station identifies the downlink beam index fed back by the terminal by using the uplink access signal sequence, the base station can add the corresponding relation between the uplink access signal sequence set and the downlink beam index into the system message in a system message configuration mode.

When the base station identifies the downlink beam index fed back by the terminal by using the time domain position of the uplink access signal, the base station and the terminal should have a consistent corresponding relationship between the predefined time domain position and the downlink beam index in a predefined manner.

When the base station identifies the downlink beam index fed back by the terminal by using the frequency domain position of the uplink access signal, the base station and the terminal should have a consistent corresponding relationship between the predefined frequency domain position and the downlink beam index in a predefined manner.

When the base station identifies the downlink beam index fed back by the terminal by using the uplink access signal sequence, the base station and the terminal should have a consistent corresponding relationship between a predefined uplink access signal sequence set and the downlink beam index in a predefined manner, wherein one uplink access signal sequence set at least comprises one uplink access signal sequence.

At the terminal side, the terminal may learn, through a predefined manner and/or receiving system information, that at least one of the following beam indication manners and related configuration information are used to feed back a downlink beam index by using an uplink discovery signal:

indicating a downlink beam index fed back by a terminal by adopting which uplink access signal sequence set an uplink access signal sequence belongs to, wherein one uplink access signal sequence set at least comprises one uplink access signal sequence;

indicating a downlink beam index fed back by the terminal by a beam identification sequence after the uplink access signal;

the downlink beam index refers to a beam index corresponding to the optimal downlink beam signal selected by the terminal according to a specific rule by receiving the downlink signal.

Through a predefined mode, the terminal can carry the fed-back downlink beam index information through at least one of the following beam indication modes:

sending an uplink access signal at a predefined time domain position;

sending an uplink access signal at a predefined frequency domain position;

selecting one or more sequences from a predefined set to transmit uplink access signals by adopting the predefined uplink access signal sequence set, wherein one uplink access signal sequence set at least comprises one uplink access signal sequence;

carrying bit information indicating feedback of downlink beam index when sending uplink access signals;

The terminal can obtain the beam indication mode in a predefined mode.

The terminal can obtain the beam indication mode by receiving the system message configuration.

When the terminal feeds back the downlink beam index by using the time domain position, the terminal can obtain the corresponding relation between the time domain position and the downlink beam index in the system message by adopting a mode of receiving the configuration of the system message.

When the terminal feeds back the downlink beam index by using the frequency domain position, the terminal can obtain the corresponding relation between the frequency domain position and the downlink beam index in the system message by adopting a mode of receiving the configuration of the system message.

When the terminal feeds back the downlink beam index by using the uplink access signal sequence, the terminal can obtain the corresponding relation between the uplink access signal sequence set and the downlink beam index in the system message by adopting a mode of receiving the system message configuration.

When the terminal feeds back the downlink beam by using the time domain position, the terminal and the base station should have a consistent corresponding relationship between the predefined time domain position and the downlink beam index in a predefined manner.

When the terminal feeds back the downlink beam by using the frequency domain position, the terminal and the base station should have a consistent corresponding relationship between the predefined frequency domain position and the downlink beam index in a predefined manner.

When the terminal feeds back the downlink beam by using the uplink access signal sequence to which the uplink access signal sequence belongs, the terminal and the base station should have a consistent corresponding relationship between the predefined uplink access signal sequence set and the downlink beam index in a predefined manner.

For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings.

The concept of the beam in practical system application means that the beam can reduce the leakage of the signal power of the base station in useless directions, the centralized characteristic of the signal power is ensured, and the coverage area of the base station is improved.

The downlink beam index is used to enable the base station to find the corresponding beam, and the actual feedback may be related information of the index, for example: time domain position index, frequency domain position index, downlink signal sequence index, etc., or values equivalent to these indices. It is within the scope of the present invention to express an index related to or equivalent to the downlink beam index in the present invention.

Example 1:

it is assumed that the base station transmits downlink synchronization signals and/or downlink system information by using N downlink beams, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine N time domain positions respectively corresponding to N downlink beam indexes. Or the base station informs the terminal of the corresponding relation between the N time domain positions and the N downlink beam indexes through a system message. The base station detects the time domain position of the uplink access signal of the terminal at one or more time domain positions, and then the base station can obtain the downlink beam index fed back by the corresponding terminal. If the terminal obtains the corresponding relationship between the N time domain positions and the N downlink beam indexes through the system message, the terminal needs to receive the system message first to obtain the corresponding relationship. After obtaining the optimal beam index related information of the base station, the terminal indirectly feeds back the downlink beam index by sending the uplink access signal at the corresponding time domain position. Such as shown in fig. 1. Wherein the time domain location may comprise a set of multiple time units. The time unit may be a micro-frame, a sub-frame, a half-frame, a radio frame, a basic time unit, etc.

Sub-example 1:

it is assumed that the base station transmits the synchronization signal and/or the downlink system information by using 8 downlink beams, and can basically cover the area that the base station needs to cover. The base station and the terminal predefine 8 time domain positions corresponding to 8 downlink beam indexes respectively, or the base station notifies the terminal of the corresponding relationship between the 8 time domain positions and the 8 downlink beam indexes through a system message, as shown in table 1. Wherein the time domain location may comprise an occupied time unit index and/or duration. Wherein the duration may be embodied in the number of time units involved. Wherein the duration may also be the number of time domain repetitions of the uplink access signal.

TABLE 1

Downlink beam indexing	Time domain location for transmitting uplink access signals
		0	Time domain position 0
1	Time domain position 1
		2	Time domain position 2
3	Time domain position 3
		4	Time domain position 4
5	Time domain position 5
		6	Time domain position 6
7	Time domain position 7

Assuming that the terminal obtains an optimal downlink beam index of 6 by detecting the downlink signal, the terminal selects a time domain position 6 to transmit an uplink access signal.

The base station detects the uplink access signals at a plurality of time domain positions, and after the base station detects the uplink access signals at the time domain position 6, the base station obtains the downlink beam index fed back by the terminal, and then the base station obtains the optimal beam for sending downlink data to the terminal according to the fed-back downlink beam index. The base station may transmit data to the terminal at a later time using the optimal beam.

Sub-example 2:

it is assumed that the base station transmits the synchronization signal and/or the downlink system information by using 10 downlink beams, and can basically cover the area that the base station needs to cover. The base station and the terminal predefine 10 time domain positions corresponding to 10 downlink beam indexes, respectively, or the base station notifies the terminal of the corresponding relationship between the 10 time domain positions and the 10 downlink beam indexes through a system message, as shown in table 2.

TABLE 2

Downlink beam indexing	Time domain location for transmitting uplink access signals
		0	Time domain position 0
1	Time domain position 1
		2	Time domain position 2
3	Time domain position 3

4	Time domain position 4
		5	Time domain position 5
6	Time domain position 6
		7	Time domain position 7
8	Time domain position 8
		9	Time domain position 9

Sub-example 3:

it is assumed that the base station transmits the synchronization signal and/or the downlink system information by using 8 downlink beams, and can basically cover the area that the base station needs to cover. The base station and the terminal predefine 8 duration levels corresponding to 8 downlink beam indexes, respectively, or the base station notifies the terminal of the correspondence between the 8 uplink access signals in the duration levels of the time domain and the 8 downlink beam indexes, respectively, through a system message, as shown in table 3. With each duration level corresponding to a duration.

TABLE 3

Downlink beam indexing	Duration grade of uplink access signal in time domain
		0	Duration class 0
1	Duration class 1
		2	Duration class 2
3	Duration class 3
		4	Duration class 4
5	Duration class 5

6	Duration class 6
		7	Duration class 7

Assuming that the terminal obtains the optimal downlink beam index of 6 by detecting the downlink signal, the terminal selects the duration level of 6 to transmit the uplink access signal.

The base station detects the uplink access signals at a plurality of time domain positions, and when the base station detects that the terminal adopts the duration level 6 to send the uplink access signals, the base station obtains the downlink beam index fed back by the terminal, and then the base station obtains the optimal beam for sending downlink data to the terminal according to the fed-back downlink beam index. The base station may transmit data to the terminal at a later time using the optimal beam.

Sub-example 4:

it is assumed that the base station transmits the synchronization signal and/or the downlink system information by using 10 downlink beams, and can basically cover the area that the base station needs to cover. The base station and the terminal predefine 10 time domain positions corresponding to 10 downlink beam indexes respectively, or the base station notifies the terminal of the corresponding relationship between the 10 uplink access signals in the time domain duration levels and the 10 downlink beam indexes respectively through a system message, as shown in table 4.

TABLE 4

Downlink beam indexing	Uplink accessDuration level of signal in time domain
		0	Duration class 0
1	Duration class 1
		2	Duration class 2
3	Duration class 3
		4	Duration class 4
5	Duration class 5
		6	Duration class 6
7	Duration class 7
		8	Duration class 8
9	Duration class 9

Example 2:

it is assumed that the base station transmits downlink synchronization signals and/or system information using N downlink beams, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine N frequency domain positions corresponding to N downlink beam indexes respectively. Or the base station informs the terminal of the corresponding relation between the N frequency domain positions and the N downlink beam indexes through a system message. The base station can obtain the downlink beam index fed back by the corresponding terminal by detecting the uplink access signal of the terminal at one or more frequency domain positions. If the terminal obtains the corresponding relationship between the N frequency domain positions and the N downlink beam indexes through the system message, the terminal needs to receive the system message first to obtain the corresponding relationship. After obtaining the optimal beam index related information of the base station, the terminal sends an uplink access signal at a corresponding frequency domain position to carry a feedback downlink beam index. Such as shown in fig. 2. The base station and the terminal identify the downlink beam indexes of different feedbacks only through the frequency domain position. The frequency domain position comprises a starting frequency domain position for sending the uplink access signal and/or a frequency domain bandwidth occupied by the uplink access signal.

Sub-example 1:

it is assumed that the base station transmits the synchronization signal and/or the downlink system information by using 8 downlink beams, and can basically cover the area that the base station needs to cover. The base station and the terminal predefine 8 frequency domain positions corresponding to 8 downlink beam indexes, respectively, or the base station notifies the terminal of the corresponding relationship between the 8 frequency domain positions and the 8 downlink beam indexes through a system message, as shown in table 5.

TABLE 5

Downlink beam indexing	Frequency domain location for transmitting uplink access signals
		0	Frequency domain position 0
1	Frequency domain position 1

2	Frequency domain position 2
		3	Frequency domain position 3
4	Frequency domain position 4
		5	Frequency domain position 5
6	Frequency domain position 6
		7	Frequency domain position 7

The terminal obtains the optimal downlink beam index of 6 by detecting the downlink signal, and at this time, the terminal selects to send the uplink access signal at the frequency domain position of 6.

The base station detects the uplink access signals at a plurality of frequency domain positions, and after the base station detects the uplink access signals at the frequency domain position 6, the base station obtains the downlink beam index fed back by the terminal, and further obtains the optimal beam for sending downlink data to the terminal according to the fed-back downlink beam index. The base station may transmit data to the terminal at a later time using the optimal beam.

Sub-example 2:

it is assumed that the base station transmits the synchronization signal and/or the downlink system information by using 10 downlink beams, and can basically cover the area that the base station needs to cover. The base station and the terminal predefine 10 frequency domain positions corresponding to 10 downlink beam indexes, respectively, or the base station notifies the terminal of the corresponding relationship between the 10 frequency domain positions and the 10 downlink beam indexes through a system message, as shown in table 6.

TABLE 6

Downlink beam indexing	Frequency domain location for transmitting uplink access signals
		0	Frequency domain position 0
1	Frequency domain position 1
		2	Frequency domain position 2
3	Frequency domain position 3
		4	Frequency domain position 4
5	Frequency domain position 5
		6	Frequency domain position 6

7	Frequency domain position 7
		8	Frequency domain position 8
9	Frequency domain position 9

Example 3:

it is assumed that the base station transmits downlink synchronization signals and/or downlink system information by using N downlink beams, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine N uplink access signal sequence sets respectively corresponding to N downlink beam indexes. Or the base station informs the terminal of the corresponding relation between the N uplink access signal sequence sets and the N downlink beam indexes through a system message, wherein one uplink access signal sequence set at least comprises one uplink access signal sequence. The base station detects which set the uplink access signal sequence of the terminal belongs to, and then the downlink beam index fed back by the corresponding terminal can be obtained. If the terminal obtains the corresponding relationship between the N uplink access signal sequence sets and the N downlink beam indexes through the system message, the terminal needs to receive the system message first to obtain the corresponding relationship. After obtaining the optimal beam index related information of the base station, the terminal sends the uplink access signal by using the sequence in the corresponding uplink access signal sequence set to carry the fed-back downlink beam index. The base station and the terminal identify the downlink beam index fed back by the terminal only by which uplink access signal sequence set the uplink access signal sequence belongs to. Wherein each uplink access signal sequence set comprises at least one uplink access signal sequence.

Sub-example 1:

it is assumed that the base station transmits the synchronization signal and/or the downlink system information by using 8 downlink beams, and can basically cover the area that the base station needs to cover. The base station and the terminal predefine 8 uplink access signal sequence sets corresponding to 8 downlink beam indexes, respectively, or the base station notifies the terminal of the corresponding relationship between the 8 uplink access signal sequence sets and the 8 downlink beam indexes through a system message, as shown in table 7.

TABLE 7

Downlink beam indexing	Uplink access signal sequence set for transmitting uplink access signal
		0	Uplink access signal sequence set 0
1	Uplink access signal sequence set 1
		2	Uplink access signal sequence set 2
3	Uplink access signal sequence set 3
		4	Uplink access signal sequence set 4
5	Uplink access signal sequence set 5
		6	Uplink access signal sequence set 6
7	Uplink access signal sequence set 7

The terminal obtains the optimal downlink beam index of 6 by detecting the downlink signal, and at this time, the terminal selects one or more uplink access signal sequences in the uplink access signal sequence set 6 to send the uplink access signal.

And the base station detects the uplink access signals at a plurality of frequency domain positions, and when the base station detects that the sequence used by the uplink access signals is a sequence in the uplink access signal sequence set 6, the base station obtains the downlink beam index fed back by the terminal, and further obtains the optimal beam for the base station to send downlink data to the terminal according to the downlink beam index fed back by the terminal. The base station may transmit data to the terminal at a later time using the optimal beam.

Sub-example 2:

it is assumed that the base station transmits the synchronization signal and/or the downlink system information by using 10 downlink beams, and can basically cover the area that the base station needs to cover. The base station and the terminal predefine 10 uplink access signal sequence sets corresponding to 10 downlink beam indexes, respectively, or the base station notifies the terminal of the corresponding relationship between the 10 uplink access signal sequence sets and the 10 downlink beam indexes through a system message, as shown in table 8.

TABLE 8

Downlink beam indexing	Uplink access signal sequence set for transmitting uplink access signal
		0	Uplink access signal sequence set 0

1	Uplink access signal sequence set 1
		2	Uplink access signal sequence set 2
3	Uplink access signal sequence set 3
		4	Uplink access signal sequence set 4
5	Uplink access signal sequence set 5
		6	Uplink access signal sequence set 6
7	Uplink access signal sequence set 7
		8	Uplink access signal sequence set 8
9	Uplink access signal sequence set 9

Example 4:

it is assumed that the base station transmits downlink synchronization signals and/or downlink system information by using N downlink beams, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine X uplink access signal sequence sets and Y uplink access signal time domain positions to form X Y = N sequence time domain position sets which respectively correspond to N downlink beam indexes. Or the base station informs the terminal of the corresponding relation between the N sequence time domain position sets and the N downlink beam indexes through a system message. The base station detects which set the uplink access signal sequence of the terminal belongs to, and then the downlink beam index fed back by the corresponding terminal can be obtained. If the terminal obtains the corresponding relationship between the N sequence time domain position sets and the N downlink beam indexes through the system message, the terminal needs to receive the system message first to obtain the corresponding relationship. After obtaining the optimal beam index related information of the base station, the terminal transmits the uplink access signal by utilizing the sequence in the corresponding uplink access signal N sequence time domain position sets to carry the fed-back downlink beam index. The base station and the terminal only identify downlink beam indexes with different feedbacks through the time domain set of the uplink access signal sequence. Each uplink access signal sequence time domain position set comprises at least one uplink access signal sequence and one time domain position.

For example: the uplink access signal sequence time domain position set 0 comprises: and the uplink access signal sequence set 0 and the uplink access signal sending time domain position 0.

The uplink access signal sequence time domain position set 1 comprises: and the uplink access signal sequence set 1 and the uplink access signal sending time domain position 1.

Or

The uplink access signal sequence time domain position set 0 comprises: and the uplink access signal sequence set 0 and the uplink access signal sending time domain position 0.

The uplink access signal sequence time domain position set 1 comprises: and the uplink access signal sequence set 0 and the uplink access signal sending time domain position 1.

Or

The uplink access signal sequence time domain position set 1 comprises: an uplink access signal sequence set 1 and an uplink access signal sending time domain position 0, and the like.

Sub-example 1:

it is assumed that the base station utilizes 8 downlink beams to transmit downlink synchronization signals and/or downlink system information, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine 8 uplink access signal sequence time domain position sets corresponding to 8 downlink beam indexes, respectively, or the base station notifies the terminal of the corresponding relationship between the 8 uplink access signal sequence time domain position sets and the 8 downlink beam indexes through a system message, as shown in table 9.

TABLE 9

Downlink beam indexing	Time domain position set of uplink access signal sequence for transmitting uplink access signal
		0	Uplink access signal sequence time domain position set 0

1	Uplink access signal sequence time domain position set 1
		2	Uplink access signal sequence time domain position set 2
3	Uplink access signal sequence time domain position set 3
		4	Uplink access signal sequence time domain position set 4
5	Uplink access signal sequence time domain position set 5
		6	Uplink access signal sequence time domain position set 6
7	Uplink access signal sequence time domain position set 7

The terminal obtains the optimal downlink beam index of 6 by detecting the downlink signal, and at this time, the terminal selects one or a combination of several uplink access signal sequences and time domain positions in the uplink access signal sequence time domain position set 6 to send the uplink access signal.

And when the base station detects that the uplink access signal sequence and the corresponding time domain position used by the uplink access signal are the sequence and the time domain position in the uplink access signal sequence set 6, the base station obtains the downlink beam index fed back by the terminal, and further obtains the optimal beam for the base station to send downlink data to the terminal according to the downlink beam index fed back by the terminal.

Sub-example 2:

it is assumed that the base station utilizes 10 downlink beams to transmit downlink synchronization signals and/or downlink system information, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine 10 uplink access signal sequence time domain position sets corresponding to 10 downlink beam indexes respectively, or the base station notifies the terminal of the corresponding relationship between the 10 uplink access signal sequence time domain position sets and the 10 downlink beam indexes through a system message, as shown in table 10.

Watch 10

Downlink beam indexing	Uplink access signal sequence set for transmitting uplink access signal
		0	Uplink access signal sequence time domain position set 0
1	Uplink access signal sequence time domain position set 1
		2	Uplink access signal sequence time domain position set 2

3	Uplink access signal sequence time domain position set 3
		4	Uplink access signal sequence time domain position set 4
5	Uplink access signal sequence time domain position set 5
		6	Uplink access signal sequence time domain position set 6
7	Uplink access signal sequence time domain position set 7
		8	Uplink access signal sequence time domain position set 8
9	Uplink access signal sequence time domain position set 9

Example 5:

it is assumed that the base station transmits downlink synchronization signals and/or downlink system information by using N downlink beams, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine X uplink access signal sequence sets and Y uplink access signal frequency domain positions to form X Y = N sequence frequency domain position sets which respectively correspond to N downlink beam indexes. Or the base station informs the terminal of the corresponding relation between the N sequence frequency domain position sets and the N downlink beam indexes through a system message. The base station detects which set the uplink access signal sequence of the terminal belongs to, and then the downlink beam index fed back by the corresponding terminal can be obtained. If the terminal obtains the corresponding relationship between the N sequence frequency domain position sets and the N downlink beam indexes through the system message, the terminal needs to receive the system message first to obtain the corresponding relationship. After obtaining the optimal downlink beam index related information of the base station, the terminal transmits uplink access signals by utilizing sequences in N sequence frequency domain position sets of corresponding uplink access signals to carry the downlink beam index which is fed back. The base station and the terminal only identify downlink beam indexes with different feedbacks through the uplink access signal sequence frequency domain set. Each uplink access signal sequence frequency domain position set comprises at least one uplink access signal sequence and one frequency domain position.

For example: the uplink access signal sequence frequency domain position set 0 comprises: and the uplink access signal sequence set 0 and the uplink access signal sending frequency domain position 0.

The uplink access signal sequence frequency domain position set 1 comprises: and the uplink access signal sequence set 1 and the uplink access signal sending frequency domain position 1.

Or

The uplink access signal sequence frequency domain position set 0 comprises: and the uplink access signal sequence set 0 and the uplink access signal sending frequency domain position 0.

The uplink access signal sequence frequency domain position set 1 comprises: and the uplink access signal sequence set 0 and the uplink access signal sending frequency domain position 1.

Or

The uplink access signal sequence frequency domain position set 1 comprises: an uplink access signal sequence set 1 and an uplink access signal transmission frequency domain position 0, and the like.

Sub-example 1:

it is assumed that the base station utilizes 8 downlink beams to transmit downlink synchronization signals and/or downlink system information, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine 8 uplink access signal sequence frequency domain position sets corresponding to 8 downlink beam indexes, respectively, or the base station notifies the terminal of the corresponding relationship between the 8 uplink access signal sequence frequency domain position sets and the 8 downlink beam indexes through a system message, as shown in table 9.

TABLE 11

Downlink beam indexing	Frequency domain position set of uplink access signal sequence for transmitting uplink access signal
		0	Frequency domain position set 0 of uplink access signal sequence
1	Frequency domain position set 1 of uplink access signal sequence

2	Frequency domain position set 2 of uplink access signal sequence
		3	Frequency domain position set 3 of uplink access signal sequence
4	Frequency domain position set 4 of uplink access signal sequence
		5	Frequency domain position set 5 of uplink access signal sequence
6	Frequency domain position set 6 of uplink access signal sequence
		7	Uplink access signal sequence frequency domain position set 7

The terminal obtains the optimal downlink beam index of 6 by detecting the downlink signal, and at this time, the terminal selects one or a combination of several uplink access signal sequences in the uplink access signal sequence frequency domain position set 6 and the frequency domain position to send the uplink access signal.

And when the base station detects that the uplink access signal sequence and the corresponding frequency domain position used by the uplink access signal are the sequence and the frequency domain position in the uplink access signal sequence set 6, the base station obtains the downlink beam index fed back by the terminal, and further obtains the optimal beam for the base station to send downlink data to the terminal according to the downlink beam index fed back by the terminal.

Sub-example 2:

it is assumed that the base station utilizes 10 downlink beams to transmit downlink synchronization signals and/or downlink system information, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine 10 uplink access signal sequence frequency domain position sets corresponding to 10 downlink beam indexes respectively, or the base station notifies the terminal of the corresponding relationship between the 10 uplink access signal sequence frequency domain position sets and the 10 downlink beam indexes through a system message, as shown in table 10.

TABLE 12

Downlink beam indexing	Frequency domain position set of uplink access signal sequence for transmitting uplink access signal
		0	Frequency domain position set 0 of uplink access signal sequence
1	Frequency domain position set 1 of uplink access signal sequence
		2	Frequency domain position set 2 of uplink access signal sequence
3	Frequency domain position set 3 of uplink access signal sequence

4	Frequency domain position set 4 of uplink access signal sequence
		5	Frequency domain position set 5 of uplink access signal sequence
6	Frequency domain position set 6 of uplink access signal sequence
		7	Uplink access signal sequence frequency domain position set 7
8	Frequency domain position set 8 of uplink access signal sequence
		9	Frequency domain position set 9 of uplink access signal sequence

Example 6:

it is assumed that the base station transmits downlink synchronization signals and/or downlink system information by using N downlink beams, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine X uplink access signal time domain positions and Y uplink access signal frequency domain positions to form X Y = N time domain and frequency domain combined positions which respectively correspond to N downlink beam indexes. Or the base station informs the terminal of the corresponding relation between the time domain and frequency domain joint position and the N downlink beam indexes through a system message. The base station detects the time domain position and the frequency domain position of the uplink access signal of the terminal to obtain the downlink beam index fed back by the corresponding terminal. If the terminal obtains the corresponding relationship between the N time domain and frequency domain joint positions and the N downlink beam indexes through the system message, the terminal needs to receive the system message first to obtain the corresponding relationship. After obtaining the optimal downlink beam index related information of the base station, the terminal sends the uplink access signal to carry the fed-back downlink beam index through the corresponding time domain position and frequency domain in the N time domain and frequency domain combined positions of the corresponding uplink access signal. Such as shown in fig. 3. Here, the uplink access signal sequence configured by the base station to the terminal is not limited, and the base station and the terminal only identify the downlink beam indexes of different feedbacks by the time domain and the frequency domain position of the uplink access signal.

For example: the uplink access signal time domain and frequency domain joint position 0 comprises: an uplink access signal sending time domain position 0 and an uplink access signal sending frequency domain position 0.

The uplink access signal sequence frequency domain position set 1 comprises: an uplink access signal sending time domain position 1 and an uplink access signal sending frequency domain position 1.

Or

The uplink access signal sequence frequency domain position set 0 comprises: an uplink access signal sending time domain position 0 and an uplink access signal sending frequency domain position 0.

The uplink access signal sequence frequency domain position set 1 comprises: an uplink access signal transmission time domain position 0 and an uplink access signal transmission frequency domain position 1.

Or

The uplink access signal sequence frequency domain position set 1 comprises: an uplink access signal transmission time domain position 1 and an uplink access signal transmission frequency domain position 0, and the like.

Sub-example 1:

it is assumed that the base station utilizes 8 downlink beams to transmit downlink synchronization signals and/or downlink system information, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine 8 uplink access signal time domain and frequency domain joint positions corresponding to 8 downlink beam indexes, respectively, or the base station notifies the terminal of the corresponding relationship between the 8 uplink access signal time domain and frequency domain joint positions and the 8 downlink beam indexes, respectively, through a system message, as shown in table 11.

Watch 13

Downlink beam indexing	Uplink access signal time domain and frequency domain joint position for transmitting uplink access signal
		0	Uplink access signal time domain and frequency domain joint position 0
1	Uplink access signal time domain and frequency domain joint position 1
		2	Uplink access signal time domain and frequency domain joint position 2

3	Uplink access signal time domain and frequency domain joint position 3
		4	Uplink access signal time domain and frequency domain joint position 4
5	Uplink access signal time domain and frequency domain joint position 5
		6	Uplink access signal time domain and frequency domain joint position 6
7	Uplink access signal time domain and frequency domain joint position 7

The terminal obtains the optimal downlink beam index of 6 by detecting the downlink signal, and at this time, the terminal selects the time domain and frequency domain joint position in the uplink access signal time domain and frequency domain joint position 6 to send the uplink access signal.

And the base station detects the corresponding time domain position and frequency domain position of the uplink access signal, and when the base station detects that the time domain position and the frequency domain position of the uplink access signal are the time domain position and the frequency domain position in the uplink access signal time domain and frequency domain combined position 6, the base station obtains the downlink beam index fed back by the terminal, and further obtains the optimal beam for the base station to send downlink data to the terminal according to the downlink beam index fed back by the terminal.

Sub-example 2:

TABLE 14

Downlink beam indexing	Uplink access signal time domain and frequency domain joint position for transmitting uplink access signal
		0	Uplink access signal time domain and frequency domain joint position 0
1	Uplink access signal time domain and frequency domain joint position 1
		2	Uplink access signal time domain and frequency domain joint position 2
3	Uplink access signal time domain and frequency domain joint position 3
		4	Uplink access signal time domain and frequency domain joint position 4

5	Uplink access signal time domain and frequency domain joint position 5
		6	Uplink access signal time domain and frequency domain joint position 6
7	Uplink access signal time domain and frequency domain joint position 7
		8	Uplink access signal time domain and frequency domain joint position 8
9	Uplink access signal time domain and frequency domain joint position 9

Example 7:

it is assumed that the base station transmits downlink synchronization signals and/or downlink system information by using N downlink beams, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine X uplink access signal time domain positions, Y uplink access signal frequency domain positions and S uplink access signal sequence sets to form X Y S = N sequences and a time domain and frequency domain combined position set which respectively correspond to N downlink beam indexes. Or the base station informs the terminal of the corresponding relation between the N sequences and the time domain and frequency domain joint position sets and the N downlink beam indexes through a system message. The base station detects the sequence of the uplink access signal of the terminal and the time domain position and the frequency domain position where the uplink access signal is located, and then the downlink beam index fed back by the corresponding terminal can be obtained. If the terminal obtains the corresponding relationship between the N sequences and the time domain and frequency domain joint position sets and the N downlink beam indexes through the system message, the terminal needs to receive the system message first to obtain the corresponding relationship. After obtaining the optimal downlink beam index related information of the base station, the terminal sends the uplink access signal to carry the fed back downlink beam index by utilizing the sequence in the corresponding uplink access signal sequence set and the corresponding time domain and frequency domain positions. Such as shown in fig. 4.

For example: the uplink access signal sequence and time domain and frequency domain joint position set 0 comprises: the uplink access signal uses the sequence in the uplink access signal set 0, and the uplink access signal sends a time domain position 0 and an uplink access signal sends a frequency domain position 0.

The uplink access signal sequence frequency domain position set 1 comprises: the uplink access signal uses the sequence in the uplink access signal set 1, and the uplink access signal sends a time domain position 1 and an uplink access signal sends a frequency domain position 1.

Or

The uplink access signal sequence frequency domain position set 0 comprises: the uplink access signal uses the sequence in the uplink access signal set 0, and the uplink access signal sends a time domain position 0 and an uplink access signal sends a frequency domain position 0.

The uplink access signal sequence frequency domain position set 1 comprises: the uplink access signal uses the sequence in the uplink access signal set 0, and the uplink access signal sends a time domain position 0 and an uplink access signal sends a frequency domain position 1.

Or

The uplink access signal sequence frequency domain position set 1 comprises: the uplink access signal uses the sequence in the uplink access signal set 0, and the uplink access signal sends a time domain position 1 and an uplink access signal sends a frequency domain position 0.

Or

The uplink access signal sequence frequency domain position set 1 comprises: the uplink access signal uses the sequence in the uplink access signal set 0, and the uplink access signal sends a time domain position 1 and an uplink access signal sends a frequency domain position 1.

Or

The uplink access signal sequence frequency domain position set 1 comprises: the uplink access signal uses the sequence in the uplink access signal set 1, and the uplink access signal sends a time domain position 0 and an uplink access signal sends a frequency domain position 0.

Or

The uplink access signal sequence frequency domain position set 1 comprises: the uplink access signal uses the sequence in the uplink access signal set 1, and the uplink access signal sends a time domain position 0 and an uplink access signal sends a frequency domain position 1.

Or

The uplink access signal sequence frequency domain position set 1 comprises: the uplink access signal uses the sequence in the uplink access signal set 1, and the uplink access signal sends a time domain position 1 and an uplink access signal sends a frequency domain position 0.

Or

The uplink access signal sequence frequency domain position set 1 comprises: the uplink access signal uses the sequence in the uplink access signal set 1, the uplink access signal transmission time domain position 1 and the uplink access signal transmission frequency domain position 1, and the like.

Sub-example 1:

it is assumed that the base station utilizes 8 downlink beams to transmit downlink synchronization signals and/or downlink system information, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine 8 uplink access signal sequences and time domain and frequency domain joint position sets corresponding to 8 downlink beam indexes respectively, or the base station notifies the terminal of the corresponding relationship between the 8 uplink access signal sequences and the time domain and frequency domain joint position sets and the 8 downlink beam indexes through a system message, as shown in table 11.

Watch 15

Downlink beam indexing	Sequence and time-domain, frequency-domain joint position set index
		0	Sequence and time domain, frequency domain joint position set 0
1	Sequence and time domain and frequency domain joint position set 1
		2	Sequence and time domain and frequency domain joint position set 2
3	Sequence and time-domain, frequency-domain joint position set 3
		4	Sequence and time-domain, frequency-domain joint location set 4
5	Sequence and time-domain, frequency-domain joint location set 5
		6	Sequence and time-domain, frequency-domain joint position set 6
7	Sequence and time-domain, frequency-domain joint location set 7

The terminal obtains the optimal downlink beam index of 6 by detecting the downlink signal, and at this time, the terminal selects and uses the sequence in the uplink access signal sequence set in the sequence and time domain and frequency domain combined position set 6 and the time domain and frequency domain positions to send the uplink access signal.

And when the base station detects that the uplink access signal sequence set and the corresponding time domain position and frequency domain position of the uplink access signal sequence are the time domain and frequency domain positions in the uplink access signal sequence and the time domain and frequency domain combined position set 6, the base station obtains the downlink beam index fed back by the terminal, and further obtains the optimal beam for the base station to send downlink data to the terminal according to the downlink beam index fed back by the terminal.

Sub-example 2:

it is assumed that the base station utilizes 10 downlink beams to transmit downlink synchronization signals and/or downlink system information, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine 10 uplink access signal sequences and time domain and frequency domain joint position sets corresponding to 10 downlink beam indexes respectively, or the base station notifies the terminal of the corresponding relationship between the 10 uplink access signal sequences and the time domain and frequency domain joint position sets and the 10 downlink beam indexes through a system message, as shown in table 11.

TABLE 16

Downlink beam indexing	Sequence and time-domain, frequency-domain joint position set index
		0	Sequence and time domain, frequency domain joint position set 0
1	Sequence and time domain and frequency domain joint position set 1
		2	Sequence and time domain and frequency domain joint position set 2
3	Sequence and time-domain, frequency-domain joint position set 3
		4	Sequence and time-domain, frequency-domain joint location set 4
5	Sequence and time-domain, frequency-domain joint location set 5
		6	Sequence and time-domain, frequency-domain joint position set 6
7	Sequence and time-domain, frequency-domain joint location set 7
		8	Sequence and time-domain, frequency-domain joint position set 8
9	Sequence and time-domain, frequency-domain joint location set 9

The terminal obtains an optimal downlink beam index of 6 by detecting the downlink signal, and at this time, the terminal selects and uses the sequence in the uplink access signal sequence set in the sequence and time domain and frequency domain combined position set 6 to send the uplink access signal at the time domain and frequency domain position corresponding to the time domain and frequency domain combined position set 6.

And the base station detects the set of the sequence of the uplink access signal and the corresponding time domain position and frequency domain position, and when the base station detects that the set of the uplink access signal sequence and the corresponding time domain position and frequency domain position are the sequence, time domain position and frequency domain position in the uplink access signal sequence and the time domain and frequency domain combined position set 6, the base station obtains the downlink beam index fed back by the terminal, and further obtains the optimal beam for the base station to send downlink data to the terminal according to the downlink beam index fed back by the terminal.

Example 8:

it is assumed that the base station transmits downlink synchronization signals and/or downlink system information by using N downlink beams, and can basically cover an area that the base station needs to cover. The base station and the terminal predefine an uplink access signal sequence set, a time domain position and a frequency domain position, or the base station informs the terminal of the uplink access signal sequence set, the time domain position and the frequency domain position through a system message. In addition, after the terminal finishes transmitting the uplink access signal, the terminal needs to carry a downlink beam index bit or a beam identification sequence, as shown in fig. 5. For example, after the terminal sends the access signal, the terminal sends the downlink beam index bit in the predefined or configured time domain and/or frequency domain. Or, the terminal sends the beam identification sequence carrying the feedback beam index on a predefined or configured time domain and/or frequency domain after sending the access signal, and different sets of the beam identification sequence may correspond to different downlink beam indexes. Each downlink beam identification sequence set at least comprises one sequence. The corresponding relationship between the beam identification sequence set and the feedback beam index can be determined in a predetermined manner, or the base station notifies the terminal through a system message.

Some combination schemes may be generated in some combination manner between the schemes of the above embodiments, for example, by using the schemes of embodiments 7 and 8, a part of information of the feedback beam may be identified by using the time domain and frequency domain positions of the uplink access signal and the sequence used, and another part of information is indicated by information bits or a beam identification sequence following the uplink access signal. The combination scheme of the various schemes adopted in the invention is within the protection scope of the invention.

The uplink access signal in the invention can be a random access signal in an LTE system, and the sequence is a random access signal Preamble sequence or a newly designed uplink access signal or an uplink access sequence, so long as the signals and sequences capable of playing an uplink access function and/or an uplink synchronization function are within the protection scope of the invention.

In the invention, the terminal has a plurality of modes for detecting the optimal sequence, which are all detection implementation modes, for example, a sequence correlation mode is adopted, and the sequence index with the highest correlation value is selected for feedback. Different criteria may select different sequence indices and are not limiting with respect to the invention. Whatever detection method is adopted, it is within the scope of the protection idea of the present invention that only one or several optimal values are obtained and the index value can be corresponded.

As can be seen from the above description, the operation of the present invention to implement the downlink beam index processing may be as shown in fig. 6, that is:

the base station informs that at least one of the following beam indication modes and related configuration information are adopted to indirectly indicate the downlink beam index needing to be fed back when sending the uplink access signal through a preset mode and/or system information:

In summary, in the method, the apparatus, or the system, in the present invention, the terminal feeds back the downlink beam index based on the difference of the time domain position and/or the difference of the frequency domain position and/or the difference of the uplink access signal sequence by predefining or receiving the system message configuration information. The base station obtains the downlink beam index fed back by the terminal by identifying the time domain position and/or the frequency domain position and/or the used sequence of the uplink access signal. In this way, the base station can obtain the optimal downlink beam of the terminal, thereby ensuring the reliable transmission of the subsequent downlink control information.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims

1. A method for implementing downlink beam index processing is characterized in that the method comprises the following steps:

2. The method according to claim 1, wherein the base station obtains the fed-back downlink beam index by at least one of the following beam identification manners in a predefined manner:

detecting an uplink access signal of a predefined time domain position;

detecting an uplink access signal of a predefined frequency domain position;

the beam identification sequence is detected after the uplink access signal.

3. The method according to claim 1 or 2, characterized in that the method further comprises:

4. The method of claim 1, wherein the base station uses a system message configuration to notify the used beam indication mode.

5. The method of claim 4, wherein the system message sent by the base station using S kinds of beams carries N kinds of beam indication mode configuration information, where S >0 and N > 0.

6. The method according to claim 1 or 2, characterized in that the method further comprises:

7. The method according to claim 1 or 2, characterized in that the method further comprises:

8. The method according to claim 1 or 2, characterized in that the method further comprises:

9. A method for implementing downlink beam index processing is characterized in that the method comprises the following steps:

10. The method according to claim 9, wherein in a predefined manner, the terminal carries the fed-back downlink beam index information through at least one of the following beam indication manners:

sending an uplink access signal at a predefined time domain position;

sending an uplink access signal at a predefined frequency domain position;

11. The method according to claim 9 or 10, characterized in that the method further comprises:

the terminal adopts a predefined mode to obtain a beam indication mode.

12. The method of claim 9, wherein the terminal obtains the beam indication mode by receiving a system message configuration.

13. The method according to claim 9 or 10, characterized in that the method further comprises:

14. The method according to claim 9 or 10, characterized in that the method further comprises:

when the terminal feeds back the downlink beam index by using the frequency domain position, the terminal obtains the corresponding relation between the frequency domain position and the downlink beam index in the system message by adopting a mode of receiving the configuration of the system message.

15. The method according to claim 9 or 10, characterized in that the method further comprises:

16. A device for realizing downlink beam index processing is a base station; wherein the base station is configured to:

17. The apparatus according to claim 16, wherein the base station is configured to obtain the fed-back downlink beam index through at least one of the following beam identification manners by a predefined manner:

detecting an uplink access signal of a predefined time domain position;

detecting an uplink access signal of a predefined frequency domain position;

the beam identification sequence is detected after the uplink access signal.

18. The apparatus according to claim 16 or 17, wherein the base station is further configured to:

19. The apparatus of claim 16, wherein the base station is configured to notify the adopted beam indication manner in a system message configuration manner.

20. The apparatus of claim 19, wherein the system message sent by the base station using S beams carries N beam indication configuration information, wherein S >0 and N > 0.

21. The apparatus of claim 16 or 17,

22. The apparatus of claim 16 or 17, wherein the method further comprises:

23. The apparatus of claim 16 or 17, wherein the method further comprises:

24. A device for realizing downlink beam index processing is a terminal; characterized in that the terminal is configured to:

25. The apparatus according to claim 24, wherein the terminal is configured to carry the fed-back downlink beam index information in a predefined manner through at least one of the following beam indication manners:

sending an uplink access signal at a predefined time domain position;

sending an uplink access signal at a predefined frequency domain position;

26. The apparatus according to claim 24 or 25, wherein the terminal is further configured to:

and obtaining a beam indication mode in a predefined mode.

27. The apparatus of claim 24, wherein the terminal is configured to obtain the beam indication mode by receiving a system message configuration.

28. The apparatus of claim 24 or 25,

29. The apparatus of claim 24 or 25,

30. The apparatus of claim 24 or 25,

31. A system for realizing downlink beam index processing is characterized in that the system comprises a base station and a terminal; wherein,

the base station is configured to:

the terminal is used for: