WO2015090061A1 - Method, apparatus and system for implementing downlink beam index processing - Google Patents

Abstract

Disclosed are a method, apparatus and system for implementing downlink beam index processing, comprising: notifying, by a base station through a pre-defined manner and/or system information, of using at least one of the following beam indication manners and relevant configuration information to indirectly indicate a downlink beam index required to be fed back when an uplink access signal is sent: using a time domain location of the uplink access signal to indicate a downlink beam index which is fed back; using a frequency domain location of the uplink access signal to indicate the downlink beam index which is fed back; using an uplink access signal sequence to indicate the downlink beam index which is fed back; adding index indication bit information at the end of the uplink access signal so as to indicate the downlink beam index which is fed back; adding a beam identification sequence at the end of the uplink access signal so as to indicate the downlink beam index which is fed back; and the downlink beam index being a beam index corresponding to using a beam to send a downlink signal.

Description

 Method, device and system for implementing downlink beam index processing

 The present invention relates to a long term evolution advanced system (LTE-Advanced) in the field of communications, and in particular, to a method, device and system for implementing downlink beam index processing. Background technique

In high-frequency communication, since the transmission is performed with a higher carrier frequency, the average path loss will be much larger than that of the conventional LTE system, for example, using a carrier frequency of 28 GHz for transmission, using the formula:

Where is the path loss value of the corresponding carrier, w is the radius of the cell coverage, and A is the wavelength of the corresponding carrier. The average ratio information of the high-frequency path loss value ^ and the LTE path loss value 4 can be calculated as

 In order to ensure coverage in the high-frequency communication, that is, the receiving side satisfies the minimum SINR requirement, it is necessary to increase the transmission and receiver gain, where W is the radius of the cell coverage, which is the wavelength of the corresponding low-frequency carrier, which is the wavelength of the corresponding high-frequency carrier.

P = P _T G _T G

 Where W is the radius of the cell coverage, A is the wavelength of the corresponding carrier, is the transmission power, is the received power, is the transmit antenna gain, and is the receive antenna gain.

The highest demand for LTE communication is required to reach an area covering 100km, if according to the highest coverage, Considering only the average path loss (open area), high-frequency communication can be considered to cover areas up to 1km. If you consider the high air absorption (oxygen absorption, rain fading, fog fading, etc.) of the actual high frequency carrier and sensitivity to shadow fading, the actual supported coverage is less than lkm.

 If the high-frequency communication supports the maximum lkm coverage, the same coverage area can obtain a different SINR ratio than the LTE system. The former has a signal-to-noise ratio of at least 20 dB lower than the latter, in order to ensure high-frequency communication and coverage within the LTE system. With an approximate SINR, it is necessary to ensure the antenna gain of high frequency communication. Fortunately, because high-frequency communication has shorter wavelengths, it can ensure more antenna elements per unit area, and more antenna elements can provide higher antenna gain, thus ensuring high-frequency communication coverage. performance.

 More antenna elements mean that beamforming can be used to ensure coverage of high frequency communications. According to the previous design idea of LTE, in order to obtain a good beamforming effect, it is necessary to accurately obtain the state information of the channel, thereby obtaining the weight of the beamforming from the state information of the channel. And obtaining a better beamforming weight. For the base station as the transmitting end, the terminal as the receiving end needs to feed back the downlink channel state information or weight. For the receiving end, the transmitting end needs to feed back the uplink channel state information or The weight is used to ensure that the base station can transmit the downlink service by using the optimal beam, and the terminal can also use the optimal beam to transmit the uplink service. At this time, there is such a problem: the base station cannot use the optimal beam coverage to the receiving end before obtaining the weight, so that the receiving end cannot measure the reference signal transmitted by the base station, or even if the base station covers the terminal, the terminal cannot When the same coverage of the base station is reached, the content of the feedback base station cannot be known, and thus the selection of the beam weight and the normal communication cannot be performed. Summary of the invention

 In view of this, the embodiments of the present invention are directed to a method, an apparatus, and a system for implementing downlink beam index processing to ensure reliable transmission of subsequent downlink control information.

 The technical solution of the embodiment of the present invention is implemented as follows:

A method for implementing downlink beam index processing, the method comprising: When the base station sends the uplink access signal by using a predefined manner and/or system information, the following at least one beam indication manner and related configuration information are used to indirectly indicate the downlink beam index that needs to be fed back:

 时 using the time domain location of the uplink access signal to indicate the downlink beam index of the feedback;

 频 using the frequency domain location of the uplink access signal to indicate the downlink beam index of the feedback;

 上行 using an uplink access signal sequence to indicate a downlink beam index of the feedback;

 Adding index indication bit information after the uplink access signal to indicate the downlink beam index of the feedback;

 After the uplink access signal, a beam identification sequence is added to indicate the downlink beam index of the feedback; and the downlink beam index is a beam index corresponding to the downlink signal transmitted by using the beam.

 In a predefined manner, the base station obtains the feedback downlink beam index by at least one of the following beam identification methods:

 Detecting an uplink access signal of a predefined time domain location;

 Detecting an uplink access signal of a predefined frequency domain location;

 Detecting a code sequence used by the uplink access signal according to the preset uplink access signal sequence set; and detecting downlink beam index indication bit information carried by the uplink access signal;

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

 The method also includes:

 The base station detects the uplink access signal according to the beam identification manner in a predefined manner. The base station notifies the used beam indication mode by means of system message configuration.

 The system message sent by the base station by using the S type beam carries N types of beam indication mode configuration information, where S>0 and N>0.

 The method also includes:

When the base station uses the time domain location of the uplink access signal to identify the downlink beam index of the feedback, the base station adds the time domain of the uplink access signal to the system message by means of system message configuration. Correspondence with the downlink beam index.

 The method also includes:

 When the base station uses the frequency domain location of the uplink access signal to identify the feedback downlink beam index, the base station adds the corresponding relationship between the frequency domain position of the uplink access signal and the downlink beam index in the system message by means of system message configuration.

 The method also includes:

 When the base station uses the uplink access signal sequence to identify the feedback downlink beam index, the base station adds a correspondence between the uplink access signal sequence set and the downlink beam index in the system message by using the system message configuration manner, where one uplink access The set of signal sequences includes at least one uplink access signal sequence.

 A method for implementing downlink beam index processing, the method comprising:

 The terminal learns, by using a predefined manner and/or receiving system information, that the downlink discovery signal is used to feed down the downlink beam index by using at least one of the following beam indication modes and related configuration information:

 The time domain location of the uplink access signal is used to indicate the downlink beam index fed back by the terminal; the frequency domain location of the uplink access signal is used to indicate the downlink beam index fed back by the terminal; and which uplink uplink signal sequence belongs to A set of uplink access signal sequences to indicate a downlink beam index fed back by the terminal;

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

 The identification sequence after the uplink access signal indicates the downlink beam index fed back by the terminal; and the downlink beam index refers to the beam index corresponding to the optimal downlink beam signal selected according to a specific rule by receiving the downlink signal.

 In a predefined manner, the terminal carries the feedback downlink beam index information by using at least one of the following beam indication modes:

Sending an uplink access signal at a predefined time domain location; Sending an uplink access signal in a predefined frequency domain location;

 Selecting one or more sequences in the predefined set to send the uplink access signal by using a predefined set of uplink access signal sequences;

 When transmitting the uplink access signal, carrying the bit information indicating the downlink beam index; when transmitting the uplink access signal, transmitting the beam identification sequence to indicate the feedback downlink beam index. The method also includes:

 The terminal obtains the beam indication mode in a predefined manner.

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

 The method also includes:

 When the terminal uses the time domain location to feed back the downlink beam index, the terminal uses the receiving system message configuration mode, and the terminal obtains the correspondence between the time domain location and the downlink beam index in the system message.

 The method also includes:

 When the terminal uses the frequency domain location to feed back the downlink beam index, the terminal uses the manner of receiving the system message configuration, and the terminal obtains the correspondence between the frequency domain location and the downlink beam index in the system message.

 The method also includes:

 When the terminal uses the uplink access signal sequence to feed back the downlink beam index, the terminal uses the receiving system message configuration manner, and the terminal obtains the correspondence between the uplink access signal sequence set and the downlink beam index in the system message, where one uplink access The set of signal sequences includes at least one uplink access signal sequence.

 An apparatus for implementing downlink beam index processing, where the apparatus is a base station; the base station is configured to: use a predefined manner and/or system information to notify, when sending an uplink access signal, the following at least one beam indication manner and related configuration Information to indirectly indicate the downlink beam index that needs feedback:

 时 using the time domain location of the uplink access signal to indicate the downlink beam index of the feedback;

频 using the frequency domain location of the uplink access signal to indicate the downlink beam index of the feedback; 上行 using an uplink access signal sequence to indicate a downlink beam index of the feedback;

 Adding index indication bit information after the uplink access signal to indicate the downlink beam index of the feedback;

 Adding a beam identification sequence to indicate a downlink beam index of the feedback after the uplink access signal; the downlink beam index refers to a beam index corresponding to the downlink signal transmitted by using the beam. The base station is further configured to obtain a feedback downlink beam index by using at least one of the following beam identification methods in a predefined manner:

 Detecting an uplink access signal of a predefined time domain location;

 Detecting an uplink access signal of a predefined frequency domain location;

 And detecting, according to the preset uplink access signal sequence set, a code sequence used by the uplink access signal; detecting a downlink beam index indicating bit information carried by the uplink access signal; and detecting the beam identification sequence after the uplink access signal.

 The base station is further configured to:

 上行 Detecting the uplink access signal according to the beam identification manner in a predefined manner.

 The base station is further configured to notify the applicable beam indication mode by means of system message configuration.

 The base station is further configured to carry N types of beam indication configuration information, where S>0, N>0.

 The base station is further configured to: when the base station uses the time domain location of the uplink access signal to identify the feedback downlink beam index, add a time domain location and a downlink beam index of the uplink access signal in the system message by using a system message configuration manner. Correspondence.

 The base station is further configured to:

When the base station uses the frequency domain location of the uplink access signal to identify the feedback downlink beam index, the corresponding relationship between the frequency domain location of the uplink access signal and the downlink beam index is added to the system message by means of system message configuration. The base station is further configured to:

 When the base station uses the uplink access signal sequence to identify the downlink beam index that is fed back, the system message configuration is used to add a correspondence between the uplink access signal sequence set and the downlink beam index in the system message, where an uplink access signal is used. The sequence set includes at least one uplink access signal sequence.

 An apparatus for implementing downlink beam index processing, where the apparatus is a terminal; the terminal is configured to: use a predefined manner and/or receive system information to learn to use the at least one of the following beam indication manners and related configuration information to utilize uplink Discover the signal feedback downlink beam index:

 The time domain location of the uplink access signal is used to indicate the downlink beam index fed back by the terminal; the frequency domain location of the uplink access signal is used to indicate the downlink beam index fed back by the terminal; and which uplink uplink signal sequence belongs to A set of uplink access signal sequences to indicate a downlink beam index fed back by the terminal;

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

 The identification sequence after the uplink access signal indicates the downlink beam index fed back by the terminal; and the downlink beam index refers to the beam index corresponding to the optimal downlink beam signal selected according to a specific rule by receiving the downlink signal.

 In a predefined manner, the terminal is further configured to carry the feedback downlink beam index information by using at least one of the following beam indication modes:

 Sending an uplink access signal at a predefined time domain location;

 Sending an uplink access signal in a predefined frequency domain location;

 Selecting one or more sequences in the predefined set to send the uplink access signal by using a predefined set of uplink access signal sequences;

When transmitting the uplink access signal, carrying the bit information indicating the downlink beam index; when transmitting the uplink access signal, transmitting the beam identification sequence to indicate the feedback downlink beam index. The terminal is further configured to:

 获得 Obtain the beam indication method in a predefined way.

 The terminal is further configured to obtain a beam indication manner by receiving a system message configuration.

 The terminal is further configured to: when the terminal uses the time domain location to feed back the downlink beam index, obtain the correspondence between the time domain location and the downlink beam index in the system message by using the manner of receiving the system message configuration.

 The terminal is further configured to: when the terminal uses the frequency domain location to feed back the downlink beam index, obtain the correspondence between the frequency domain location and the downlink beam index in the system message by using the manner of receiving the system message configuration.

 The terminal is further configured to: when the terminal uses the uplink access signal sequence to feed back the downlink beam index, obtain the correspondence between the uplink access signal sequence set and the downlink beam index in the system message by using the receiving system message configuration manner, where And an uplink access signal sequence set includes at least one uplink access signal sequence.

 A system for implementing a downlink beam indexing process, the system includes a base station and a terminal; wherein, the base station is configured to:

 When the uplink access signal is sent by a predefined manner and/or system information, the following at least one beam indication mode and related configuration information are used to indirectly indicate the downlink beam index that needs to be fed back:

 时 using the time domain location of the uplink access signal to indicate the downlink beam index of the feedback;

 频 using the frequency domain location of the uplink access signal to indicate the downlink beam index of the feedback;

 上行 using an uplink access signal sequence to indicate a downlink beam index of the feedback;

 Adding index indication bit information after the uplink access signal to indicate the downlink beam index of the feedback;

Adding a beam identification sequence to indicate a downlink beam index of the feedback after the uplink access signal; the terminal is configured to: The downlink signal index is fed back by using the uplink discovery signal by using at least one of the following beam indication modes and related configuration information by using a predefined manner and/or receiving system information:

 The time domain location of the uplink access signal is used to indicate the downlink beam index of the feedback; the frequency domain location of the uplink access signal is used to indicate the downlink beam index of the feedback; and which uplink uplink is used by the uplink access signal sequence Incorporating a signal sequence set to indicate a downlink beam index of the feedback, where the uplink access signal sequence set includes at least one uplink access signal sequence;

 Adding index indication bit information after the uplink access signal to indicate the downlink beam index of the feedback;

 The identification sequence after the uplink access signal indicates the downlink beam of the feedback 1;

 The downlink beam index is a beam index corresponding to the downlink signal transmitted by using the beam. The foregoing embodiment of the present invention can ensure reliable transmission of subsequent downlink control information. DRAWINGS

 1 is a schematic diagram of a principle of using a time domain position indication beam index according to an embodiment of the present invention; FIG. 2 is a schematic diagram of a principle of using a frequency domain position indication beam index according to an embodiment of the present invention; FIG. 3 is a time domain and Schematic diagram of frequency domain location joint indication beam indexing;

 4 is a schematic diagram of a principle of using a time domain and a frequency domain location joint sequence set indicator beam index according to an embodiment of the present invention;

 FIG. 5 is a schematic diagram showing the principle of using an additional area indication information of an uplink access signal to indicate a beam index according to an embodiment of the present invention; FIG.

detailed description

In practical applications, a discovery process can be applied, through which the base station and the terminal are made. The end can discover each other and use the optimal weight to communicate.

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

 There are many rules defining rules for specific rules. For example, the definition method with the best signal quality or the method for defining the optimal signal power can be used.

 On the base station side, the base station can notify the terminal to send the uplink access signal in a predefined manner and/or system information, and use at least one of the following beam indication modes and related configuration information to indirectly indicate the downlink beam index that needs to be fed back:

 时 using the time domain location of the uplink access signal to indicate the downlink beam index of the feedback;

 频 using the frequency domain location of the uplink access signal to indicate the downlink beam index of the feedback;

 上行 using an uplink access signal sequence to indicate a downlink beam index of the feedback;

 Adding index indication bit information after the uplink access signal to indicate the downlink beam index of the feedback;

 Adding a beam identification sequence to indicate a downlink beam index of the feedback 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 through the downlink signal.

 In a predefined manner, 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 location;

 Detecting an uplink access signal of a predefined frequency domain location;

Detecting a code sequence used by the uplink access signal according to a predefined set of uplink access signal sequences; Detecting downlink beam index indication bit information of the feedback carried by the uplink access signal; detecting the beam identification sequence after the uplink access signal.

 The base station can detect the uplink access signal according to the beam identification manner in a predefined manner.

 The base station can notify the terminal of the beam indication mode by means of system message configuration. The system message that the base station can transmit by using the S type beam carries N types of beam indication configuration information, where S>0 and N>0.

 When the base station uses the time domain location of the uplink access signal to identify the downlink beam index fed back by the terminal, the base station can add the corresponding relationship between the time domain location of the uplink access signal and the downlink beam index in the system message by means of system message configuration. .

 When the base station uses the frequency domain location of the uplink access signal to identify the downlink beam index fed back by the terminal, the base station can add the corresponding relationship between the frequency domain position of the uplink access signal and the downlink beam index in the system message by means of system message configuration. .

 When the base station uses the uplink access signal sequence to identify the downlink beam index fed back by the terminal, the base station can add the correspondence between the uplink access signal sequence set and the downlink beam index in the system message by means of the system message configuration.

 When the base station uses the time domain location of the uplink access signal to identify the downlink beam index fed back by the terminal, the base station and the terminal should have a consistent correspondence between the predefined time domain location and the downlink beam index in a predefined manner.

 When the base station uses the frequency domain location of the uplink access signal to identify the downlink beam index fed back by the terminal, the base station and the terminal should have a consistent correspondence between the predefined frequency domain location and the downlink beam index in a predefined manner.

When the base station uses the uplink access signal sequence to identify the downlink beam index fed back by the terminal, the base station and the terminal should have a consistent correspondence between the predefined uplink access signal sequence set and the downlink beam index in a predefined manner, where The set of uplink access signal sequences includes at least An uplink access signal sequence.

 On the terminal side, the terminal can learn the downlink beam index by using the uplink discovery signal by using at least one beam indication mode and related configuration information in a predefined manner and/or receiving system information:

 The time domain location of the uplink access signal is used to indicate the downlink beam index fed back by the terminal; the frequency domain location of the uplink access signal is used to indicate the downlink beam index fed back by the terminal; and which uplink uplink signal sequence belongs to The uplink access signal sequence set is used to indicate the downlink beam index fed back by the terminal, where the uplink access signal sequence set includes at least one uplink access signal sequence;

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

 The beam identification sequence after the uplink access signal indicates the downlink beam index fed back by the terminal; the downlink beam index refers to the beam index corresponding to the optimal downlink beam signal selected by the terminal according to the specific rule by receiving the downlink signal.

 In a predefined manner, the terminal can carry the feedback downlink beam index information by using at least one of the following beam indication modes:

 Sending an uplink access signal at a predefined time domain location;

 Sending an uplink access signal in a predefined frequency domain location;

 And using a predefined set of uplink access signal sequences, selecting one or more sequences in the predefined set to send uplink access signals, where the uplink access signal sequence set includes at least one uplink access signal sequence;

 When transmitting the uplink access signal, carrying the bit information indicating the feedback downlink beam index; when transmitting the uplink access signal, transmitting the beam identification sequence to indicate the feedback downlink beam index. The terminal can obtain the beam indication mode in a predefined manner.

The terminal can obtain the beam indication mode by receiving the system message configuration. When the terminal uses the time domain location to feed back the downlink beam index, the terminal can obtain the correspondence between the time domain location and the downlink beam index in the system message.

 When the terminal uses the frequency domain location to feed back the downlink beam index, the terminal can obtain the correspondence between the frequency domain location and the downlink beam index in the system message by using the receiving system message configuration manner.

 When the terminal uses the uplink access signal sequence to feed back the downlink beam index, the terminal can obtain the correspondence between the uplink access signal sequence set and the downlink beam index in the system message by using the receiving system message configuration.

 When the terminal uses the time domain location to feed back the downlink beam, the terminal and the base station should have a consistent correspondence between the predefined time domain location and the downlink beam index in a predefined manner.

 When the terminal uses the frequency domain location to feed back the downlink beam, the terminal and the base station should have a consistent correspondence between the predefined frequency domain location and the downlink beam index in a predefined manner.

 When the terminal uses the uplink access signal sequence to which the uplink access signal sequence belongs to feed back the downlink beam, the terminal and the base station should have a consistent correspondence between the predefined uplink access signal sequence set and the downlink beam index in a predefined manner. .

 In order to better understand the present invention, the present invention will be further described below in conjunction with the drawings and specific embodiments.

 In the actual system application, the concept of the beam means that the beam can reduce the leakage of the signal power of the base station in the useless direction, ensure the concentrated characteristics of the signal power, and improve the coverage of the base station.

 The downlink beam index is used to enable the base station to find a corresponding beam, and the actual feedback may be related information of the index, for example, a time domain location index, a frequency domain location index, a downlink signal sequence index, or the like, and the like. The value of the price. Any index that can be associated with or equivalent to the downstream beam index described in the present invention is within the scope of the present invention.

 Example 1

It is assumed that the base station transmits the downlink synchronization signal and/or the downlink system information by using the N downlink beams, and can substantially cover the area that the base station needs to cover. The base station and the terminal predefine N time domain locations respectively Corresponding to N downlink beam indexes. Alternatively, the base station informs the terminal of the correspondence between the N time domain locations and the N downlink beam indexes by using a system message. The base station can obtain the downlink beam index fed back by the corresponding terminal by detecting the time domain location of the uplink access signal of the terminal in one or more time domain locations. If the terminal obtains the correspondence between the N time domain locations and the N downlink beam indexes by using the system message, the terminal needs to first receive the system message 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 in the corresponding time domain position. For example, Figure 1 shows. The time domain location may include a collection of multiple time units. The time unit can be a microframe, a subframe, a field, a radio frame, a basic time unit, and the like.

 Sub-example 1 :

 It is assumed that the base station uses 8 downlink beams to transmit synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal pre-define eight time-domain locations respectively corresponding to eight downlink beam indexes, or the base station notifies the terminal of the correspondence between the eight time-domain locations and the eight downlink beam indexes through system messages, as shown in Table 1. The time domain location may include the occupied time unit index and/or duration. The duration can be expressed in terms of the number of time units included. The duration may also be the number of time domain repetitions of the uplink access signal.

 Table 1

 Downlink beam index Time domain location for transmitting uplink access signals

0 o or position 0

 1 time domain location 1

 2 time domain location 2

 3 time domain location 3

 4 o or position 4

 5 time domain location 5

6 o or position 6 7 time domain location 7

 It is assumed that the terminal obtains the optimal downlink beam index by detecting the downlink signal to 6, and the terminal selects the time domain location 6 to transmit the uplink access signal.

 The base station detects the uplink access signal in multiple time domain locations. After the base station detects the uplink access signal at the time domain location 6, the base station obtains the downlink beam index fed back by the terminal, and according to the The fed back downlink beam index base station obtains an optimal beam for transmitting downlink data to the terminal. The base station can transmit the data to the terminal at a later time to use the optimal beam.

 Sub-example 2:

 It is assumed that the base station uses 10 downlink beams to transmit synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal pre-define 10 time domain locations respectively corresponding to 10 downlink beam indexes, or the base station informs the terminal of the correspondence between the 10 time domain locations and the 10 downlink beam indexes through system messages, as shown in Table 2.

 Table 2

Assume that the terminal obtains the optimal downlink beam index by 6 by detecting the downlink signal. Select the time domain location 6 to send the uplink access signal.

 The base station detects the uplink access signal in multiple time domain locations. After the base station detects the uplink access signal at the time domain location 6, the base station obtains the downlink beam index fed back by the terminal, and according to the The fed back downlink beam index base station obtains an optimal beam for transmitting downlink data to the terminal. The base station can transmit the data to the terminal at a later time to use the optimal beam.

 Sub-example 3:

 It is assumed that the base station uses 8 downlink beams to transmit synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal pre-define 8 duration levels corresponding to 8 downlink beam indexes respectively, or the base station informs the terminal of the correspondence between the duration levels of the 8 uplink access signals in the time domain and the 8 downlink beam indexes respectively through the system message. Relationship, as shown in Table 3. Each of these duration levels corresponds to a duration.

 table 3

 It is assumed that the terminal obtains the optimal downlink beam index by detecting the downlink signal to 6, and the terminal selects the duration level 6 to transmit the uplink access signal.

The base station detects the uplink access signal in multiple time domain locations, and after the base station detects that the terminal sends the uplink access signal by using the duration level 6, the base station obtains the feedback from the terminal. The downlink beam index is further obtained by the base station according to the feedback downlink beam index, and the optimal beam for transmitting downlink data to the terminal is obtained. The base station can transmit the data to the terminal at a later time to use the optimal beam.

 Sub-embodiment 4:

 It is assumed that the base station uses 10 downlink beams to transmit synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal predefine 10 time domain locations respectively corresponding to 10 downlink beam indexes, or the base station informs the terminal of the correspondence between the duration indexes of the 10 uplink access signals in the time domain and the 10 downlink beam indexes respectively through the system message. Relationship, as shown in Table 4.

 Table 4

 It is assumed that the terminal obtains the optimal downlink beam index by detecting the downlink signal to 6, and the terminal selects the duration level 6 to transmit the uplink access signal.

The base station detects the uplink access signal in multiple time domain locations, and after the base station detects that the terminal sends the uplink access signal by using the duration level 6, the base station obtains the feedback from the terminal. The downlink beam index is further obtained by the base station according to the feedback downlink beam index, and the optimal beam for transmitting downlink data to the terminal is obtained. The base station can transmit the data to the terminal at a later time to use the optimal beam.

 Example 2:

 It is assumed that the base station uses the N downlink beams to transmit downlink synchronization signals and/or system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal predefine N frequency domain locations corresponding to N downlink beam indexes respectively. Alternatively, the base station informs the terminal of the correspondence between the N frequency domain locations and the N downlink beam indexes by using 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 in one or more frequency domain locations. If the terminal obtains the correspondence between the N frequency domain locations and the N downlink beam indexes by using the system message, the terminal needs to first receive the system message to obtain the corresponding relationship. After obtaining the optimal beam index related information of the base station, the terminal carries the downlink beam index of the feedback by transmitting the uplink access signal in the corresponding frequency domain position. For example, as shown in Figure 2. The base station and the terminal identify the different feedback downlink beam indices only by the frequency domain location. The frequency domain location includes a starting frequency domain location for transmitting an uplink access signal and/or a frequency domain bandwidth occupied by an uplink access signal.

 Sub-example 1 :

 It is assumed that the base station uses 8 downlink beams to transmit synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal pre-define eight frequency domain locations respectively corresponding to eight downlink beam indexes, or the base station notifies the terminal of the correspondence between the eight frequency domain locations and the eight downlink beam indexes through system messages, as shown in Table 5.

 Downlink beam index Transmit the frequency domain location of the uplink access signal

0 frequency i or position 0

 1 frequency domain location 1

2 frequency domain location 2 3 frequency domain location 3

 4 frequency i or position 4

 5 frequency domain location 5

 6 frequency i or position 6

 7 frequency domain location 7

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

 The base station detects the uplink access signal in multiple frequency domain locations. After the base station detects the uplink access signal at the frequency domain location 6, the base station obtains the downlink beam index fed back by the terminal, and further according to the The fed back downlink beam index base station obtains an optimal beam for transmitting downlink data to the terminal. The base station can transmit the data to the terminal at a later time to use the optimal beam.

 Sub-example 2:

 It is assumed that the base station uses 10 downlink beams to transmit synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal pre-define 10 frequency domain locations respectively corresponding to 10 downlink beam indexes, or the base station informs the terminal of the correspondence between the 10 frequency domain locations and the 10 downlink beam indexes through system messages, as shown in Table 6.

 Table 6

 Downlink beam index Transmit the frequency domain location of the uplink access signal

0 frequency i or position 0

 1 frequency domain location 1

 2 frequency domain location 2

 3 frequency domain location 3

 4 frequency i or position 4

 5 frequency domain location 5

6 frequency i or position 6 7 frequency domain location 7

 8 frequency i or position 8

 9 frequency i or position 9

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

 The base station detects the uplink access signal in multiple frequency domain locations. After the base station detects the uplink access signal at the frequency domain location 6, the base station obtains the downlink beam index fed back by the terminal, and further according to the The fed back downlink beam index base station obtains an optimal beam for transmitting downlink data to the terminal. The base station can transmit the data to the terminal at a later time to use the optimal beam.

 Example 3:

 It is assumed that the base station uses the N downlink beams to transmit downlink synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal predefine N sets of uplink access signal sequences corresponding to N downlink beam indexes respectively. Or, the base station notifies, by using a system message, a correspondence between the N sets of uplink access signal sequences and the N downlink beam indexes, where the uplink access signal sequence set includes at least one uplink access signal sequence. The base station detects which set of uplink access signal sequences the terminal belongs to, and obtains a downlink beam index fed back by the corresponding terminal. If the terminal obtains the correspondence between the N uplink access signal sequence sets and the N downlink beam indexes by using the system message, the terminal needs to first receive the system message to obtain the corresponding relationship. After obtaining the optimal beam index related information of the base station, the terminal carries the feedback downlink beam index by transmitting the uplink access signal by using the sequence in the corresponding uplink access signal sequence set. 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. Each of the uplink access signal sequence sets includes at least one uplink access signal sequence.

 Sub-example 1 :

Suppose the base station uses 8 downlink beams to transmit synchronization signals and/or downlink system information. Basically cover the area that the base station needs to cover. The base station and the terminal pre-define 8 sets of uplink access signal sequences respectively corresponding to 8 downlink beam indexes, or the base station notifies the terminal of the correspondence between the 8 sets of uplink access signal sequences and the 8 downlink beam indexes through the system message, As shown in Table 7.

 Table 7

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

 The base station detects the uplink access signal in multiple frequency domain locations. When the base station detects that the sequence used by the uplink access signal is a sequence in the uplink access signal sequence set 6, the base station obtains the downlink beam fed back by the terminal. The index, and then the optimal beam for transmitting downlink data to the terminal by the base station according to the feedback downlink beam index of the terminal. The base station can transmit the data to the terminal at a later time to utilize the optimal beam.

 Sub-example 2:

It is assumed that the base station uses 10 downlink beams to transmit synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. Base station and terminal predefine 10 uplink access signals The sequence set corresponds to 10 downlink beam indexes respectively, or the base station informs the terminal of the correspondence 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

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

 The base station detects the uplink access signal in multiple frequency domain locations. When the base station detects that the sequence used by the uplink access signal is a sequence in the uplink access signal sequence set 6, the base station obtains the downlink beam fed back by the terminal. The index, and then the optimal beam for transmitting downlink data to the terminal by the base station according to the feedback downlink beam index of the terminal. The base station can transmit the data to the terminal at a later time to utilize the optimal beam.

 Example 4:

It is assumed that the base station transmits downlink synchronization signals and/or downlink system information by using N downlink beams. Basically cover the area that the base station needs to cover. The base station and the terminal predefine the time domain location components of the X uplink access signal sequence sets and the Y uplink access signals. The X*Y=N sequence time domain location sets respectively correspond to the N downlink beam indexes. Alternatively, the base station informs the terminal of the correspondence between the N sequence time domain location sets and the N downlink beam indexes by using a system message. The base station detects which set of uplink access signal sequences of the terminal belongs to, and obtains a downlink beam index fed back by the corresponding terminal. If the terminal obtains the correspondence between the N sequence time domain location sets and the N downlink beam indexes by using the system message, the terminal needs to first receive the system message to obtain the corresponding relationship. After obtaining the optimal beam index related information of the base station, the terminal carries the uplink downlink index by using the sequence of the sequence of the N uplink time domain location sets of the corresponding uplink access signal to carry the feedback downlink beam index. The base station and the terminal identify the different feedback downlink beam indices only through the uplink access signal sequence time domain set. Each of the uplink access signal sequence time domain location sets includes at least one uplink access signal sequence and one time domain location.

 For example: The uplink access signal sequence time domain location set 0 includes: uplink access signal sequence set 0 and uplink access signal transmission time domain position 0.

 The uplink access signal sequence time domain location set 1 includes: an uplink access signal sequence set 1 and an uplink access signal transmission time domain location 1.

 Or

 The uplink access signal sequence time domain location set 0 includes: an uplink access signal sequence set 0 and an uplink access signal transmission time domain position 0.

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

 Or

 The uplink access signal sequence time domain location set 0 includes: an uplink access signal sequence set 0 and an uplink access signal transmission time domain position 0.

The uplink access signal sequence time domain location set 1 includes: uplink access signal sequence set 1 And the uplink access signal is transmitted in the time domain position 0, and so on.

 Sub-example 1 :

 It is assumed that the base station utilizes 8 downlink beams to transmit downlink synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal predefine eight uplink access signal sequences, and the time domain location set respectively corresponds to eight downlink beam indexes, or the base station notifies the terminal through the system message that the eight uplink access signal sequences are in the time domain location set and the eight downlink beam indexes respectively. The correspondence between them is shown in Table 9.

 Table 9

 The terminal obtains an optimal downlink beam index of 6 by detecting the downlink signal, and the terminal selects one of the uplink access signal sequence and the time domain location in the uplink access signal sequence time domain location set 6 to send the uplink access. signal.

The base station detects the sequence of the uplink access signal and the corresponding time domain location, and when the base station detects the uplink access signal sequence used by the uplink access signal and the corresponding time domain location is a sequence in the uplink access signal sequence set 6 And the time domain location, the base station obtains the downlink beam index fed back by the terminal, and obtains the optimal beam that the base station sends the 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 uses 10 downlink beams to transmit downlink synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal predefine 10 uplink access signal sequences, and the time domain location set respectively corresponds to 10 downlink beam indexes, or the base station notifies the terminal 10 uplink access signal sequence time domain location sets and 10 downlink beam indexes respectively through system messages. The correspondence between them is shown in Table 10.

 Table 10

 The terminal obtains an optimal downlink beam index of 6 by detecting the downlink signal, and the terminal selects one of the uplink access signal sequence and the time domain location in the uplink access signal sequence time domain location set 6 to send the uplink access. signal.

The base station detects the sequence of the uplink access signal and the corresponding time domain location, and when the base station detects the uplink access signal sequence used by the uplink access signal and the corresponding time domain location is a sequence in the uplink access signal sequence set 6 And the time domain location, the base station obtains the downlink beam index fed back by the terminal, and then obtains the base station to send to the terminal according to the downlink beam index fed back by the terminal. The optimal beam of the downlink data.

 Example 5

 It is assumed that the base station uses the N downlink beams to transmit downlink synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal predefine the frequency domain location components of the X uplink access signal sequence sets and the Y uplink access signals. The X*Y=N sequence frequency domain location sets respectively correspond to the N downlink beam indexes. Alternatively, the base station notifies the terminal of the correspondence between the N sequence frequency domain location sets and the N downlink beam indexes by using a system message. The base station detects which set of uplink access signal sequences of the terminal belongs to, and obtains a downlink beam index fed back by the corresponding terminal. If the terminal obtains the correspondence between the N sequence frequency domain location sets and the N downlink beam indexes by using the system message, the terminal needs to first receive the system message to obtain the corresponding relationship. After obtaining the optimal downlink beam index related information of the base station, the terminal carries the downlink downlink beam index by using the sequence of the corresponding uplink access signal N sequence frequency domain location sets to transmit the uplink access signal. The base station and the terminal identify the different feedback downlink beam indices only through the frequency domain set of the uplink access signal sequence. The frequency domain location set of each uplink access signal sequence includes at least one uplink access signal sequence and one frequency domain location.

 For example: The uplink access signal sequence frequency domain location set 0 includes: an uplink access signal sequence set 0 and an uplink access signal transmission frequency domain position 0.

 The uplink access signal sequence frequency domain location set 1 includes: an uplink access signal sequence set 1 and an uplink access signal transmission frequency domain location 1.

 Or

 The uplink access signal sequence frequency domain location set 0 includes: an uplink access signal sequence set 0 and an uplink access signal transmission frequency domain position 0.

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

Or The uplink access signal sequence frequency domain location set 0 includes: an uplink access signal sequence set 0 and an uplink access signal transmission frequency domain position 0.

 The uplink access signal sequence frequency domain location set 1 includes: an uplink access signal sequence set 1 and an uplink access signal transmission frequency domain position 0, and so on.

 Sub-example 1 :

 It is assumed that the base station utilizes 8 downlink beams to transmit downlink synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal predefine eight uplink access signal sequence frequency domain location sets respectively corresponding to eight downlink beam indexes, or the base station informs the terminal through the system message that the eight uplink access signal sequences are in the frequency domain location set and the eight downlink beam indexes respectively. The correspondence between them is shown in Table 11.

 Table 11

 The terminal obtains the optimal downlink beam index by detecting the downlink signal, and the terminal selects one of the uplink access signal sequence and the frequency domain location in the frequency domain location set 6 of the uplink access signal sequence to send the uplink access. signal.

The base station detects the sequence of the uplink access signal and the corresponding frequency domain location, and when the base station detects the uplink access signal sequence used by the uplink access signal and the corresponding frequency domain location is uplink access The sequence and the frequency domain location in the signal sequence set 6 obtain the downlink beam index fed back by the terminal, and obtain the optimal beam that the base station sends the 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 uses 10 downlink beams to transmit downlink synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal pre-define 10 uplink access signal sequence frequency domain location sets respectively corresponding to 10 downlink beam indexes, or the base station informs the terminal through the system message 10 uplink access signal sequence frequency domain location sets and 10 downlink beam indexes respectively The correspondence between them is shown in Table 12.

 Table 12

 The terminal obtains the optimal downlink beam index by detecting the downlink signal, and the terminal selects one of the uplink access signal sequence and the frequency domain location in the frequency domain location set 6 of the uplink access signal sequence to send the uplink access. signal.

The base station detects the sequence of the uplink access signal and the corresponding frequency domain location, when the base station detects ^ The uplink access signal sequence used by the uplink access signal and the corresponding frequency domain location are the sequence and the frequency domain location in the uplink access signal sequence set 6, and the base station obtains the downlink beam index fed back by the terminal, and then according to the The downlink beam index fed back by the terminal obtains an optimal beam that the base station sends downlink data to the terminal.

 Example 6:

 It is assumed that the base station uses the N downlink beams to transmit downlink synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal predefine the time domain location of the X uplink access signals and the frequency domain location of the Y uplink access signals. X*Y=N time domain and frequency domain joint positions respectively correspond to N downlink beam indexes. Alternatively, the base station notifies the correspondence between the time domain and the frequency domain joint position of the terminal and the N downlink beam indexes by using a system message. The base station detects the time domain location and the frequency domain location of the uplink access signal of the terminal to obtain a downlink beam index corresponding to the terminal feedback. If the terminal obtains the correspondence between the N time domain and the frequency domain joint position and the N downlink beam indexes respectively by using the system message, the terminal needs to first receive the system message 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 in the corresponding time domain location and the frequency domain in the corresponding time domain and the frequency domain joint position of the corresponding uplink access signal to carry the downlink of the feedback. Beam index. For example, Figure 3 shows. Here, the uplink access signal sequence configured by the base station to the terminal is not limited, and the base station and the terminal identify the different feedback downlink beam indexes only 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 location 0 includes: the uplink access signal transmission time domain location 0 and the uplink access signal transmission frequency domain location 0.

 The uplink access signal sequence frequency domain location set 1 includes: an uplink access signal transmission time domain location 1 and an uplink access signal transmission frequency domain location 1.

 Or

The uplink access signal sequence frequency domain location set 0 includes: the uplink access signal transmission time domain location 0 and the uplink access signal transmission frequency domain location 0. The uplink access signal sequence frequency domain location set 1 includes: an uplink access signal transmission time domain location 0 and an uplink access signal transmission frequency domain location 1.

 Or

 The uplink access signal sequence frequency domain location set 0 includes: the uplink access signal transmission time domain position 0 and the uplink access signal transmission frequency domain position 0.

 The uplink access signal sequence frequency domain location set 1 includes: an uplink access signal transmission time domain location 1 and an uplink access signal transmission frequency domain location 0, and so on.

 Sub-example 1 :

 It is assumed that the base station utilizes 8 downlink beams to transmit downlink synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal predefine 8 uplink access signals, and the time domain and the frequency domain joint position respectively correspond to 8 downlink beam indexes, or the base station notifies the terminal 8 uplink access signals by the system message, the time domain and the frequency domain joint position respectively and 8 The correspondence between the downlink beam indexes is as shown in Table 13.

 Table 13

Downlink beam index Time-domain and frequency-domain joint position of the uplink access signal transmitting the uplink access signal

0 When the uplink access signal is used - the joint position of the domain and the frequency domain is 0

 1 When the uplink access signal is used - the joint position of the domain and the frequency domain 1

 2 When the uplink access signal is used - the joint position of the domain and the frequency domain 2

 3 When the uplink access signal is used - the joint location of the domain and the frequency domain 3

 4 When the uplink access signal is used - the joint location of the domain and the frequency domain 4

 5 When the uplink access signal is used - the joint location of the domain and the frequency domain 5

 6 When the uplink access signal is used - the joint position of the domain and the frequency domain 6

 7 When the uplink access signal is used - the joint position of the domain and the frequency domain 7

The terminal obtains an optimal downlink beam index of 6 by detecting the downlink signal, and the terminal selects to transmit on the time domain and the frequency domain joint position in the joint position of the uplink access signal in the time domain and the frequency domain. Line access signal.

 The base station detects a corresponding time domain location and a frequency domain location of the uplink access signal, and when the base station detects that the time domain location and the frequency domain location where the uplink access signal is located, the time domain and the frequency domain joint location of the uplink access signal In the time domain and the frequency domain location of the base station, the base station obtains the downlink beam index fed back by the terminal, and obtains the optimal beam that the base station sends the 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 8 downlink beams to transmit downlink synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal predefine 8 uplink access signals, and the time domain and the frequency domain joint position respectively correspond to 8 downlink beam indexes, or the base station notifies the terminal 8 uplink access signals by the system message, the time domain and the frequency domain joint position respectively and 8 The correspondence between the downlink beam indexes is as shown in Table 14.

 Table 14

 Downlink beam index Time-domain and frequency-domain joint position of the uplink access signal transmitting the uplink access signal

0 When the uplink access signal is used - the joint position of the domain and the frequency domain is 0

 1 When the uplink access signal is used - the joint position of the domain and the frequency domain 1

 2 When the uplink access signal is used - the joint position of the domain and the frequency domain 2

 3 When the uplink access signal is used - the joint location of the domain and the frequency domain 3

 4 When the uplink access signal is used - the joint location of the domain and the frequency domain 4

 5 When the uplink access signal is used - the joint location of the domain and the frequency domain 5

 6 When the uplink access signal is used - the joint position of the domain and the frequency domain 6

 7 When the uplink access signal is used - the joint position of the domain and the frequency domain 7

 8 When the uplink access signal is used - the joint position of the domain and the frequency domain 8

 9 When the uplink access signal is used - the joint position of the domain and the frequency domain 9

The terminal obtains an optimal downlink beam index of 6 by detecting the downlink signal, and the terminal selects The uplink access signal is sent in the time domain and the frequency domain joint position in the joint position 6 of the uplink access signal in the time domain and the frequency domain.

 The base station detects a corresponding time domain location and a frequency domain location of the uplink access signal, and when the base station detects that the time domain location and the frequency domain location where the uplink access signal is located, the time domain and the frequency domain joint location of the uplink access signal In the time domain and the frequency domain location of the base station, the base station obtains the downlink beam index fed back by the terminal, and obtains the optimal beam that the base station sends the downlink data to the terminal according to the downlink beam index fed back by the terminal.

 Example 7

 It is assumed that the base station uses the N downlink beams to transmit downlink synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal predefine the time domain location of the X uplink access signals and the frequency domain location of the Y uplink access signals and the set of S uplink access signal sequences to form X*Y*S=N sequences and time domain and frequency. The domain joint location set corresponds to N downlink beam indexes respectively. Alternatively, the base station informs the terminal of the correspondence between the N sequence and the time domain and the frequency domain joint location set and the N downlink beam indexes by using a system message. The base station detects the sequence of the uplink access signal of the terminal and the location of the time domain and the frequency domain location to obtain the downlink beam index fed back by the corresponding terminal. If the terminal obtains the correspondence between the N sequence and the time domain and the frequency domain joint location set respectively and the N downlink beam indexes by using the system message, the terminal needs to first receive the system message to obtain the correspondence. After obtaining the optimal downlink beam index related information of the base station, the terminal carries the feedback downlink beam index by using the sequence in the corresponding uplink access signal sequence set and transmitting the uplink access signal in the corresponding time domain and frequency domain positions. For example, as shown in Figure 4.

 For example, the uplink access signal sequence and the time domain and frequency domain joint location set 0 include: the uplink access signal uses a sequence in the uplink access signal set 0, and the uplink access signal transmits the time domain position 0 and the uplink access signal transmission frequency. The domain location is 0.

The uplink access signal sequence frequency domain location set 1 includes: the uplink access signal uses a sequence in the uplink access signal set 1, the uplink access signal transmits the time domain location 1 and the uplink access signal is sent. The frequency domain position is 1.

 Or

 The uplink access signal sequence frequency domain location set 0 includes: the uplink access signal uses the uplink access signal set 0 sequence, the uplink access signal transmission time domain location 0, and the uplink access signal transmission frequency domain location 0.

 The uplink access signal sequence frequency domain location set 1 includes: the uplink access signal uses the uplink access signal set 0 sequence, the uplink access signal transmission time domain location 0, and the uplink access signal transmission frequency domain location 1.

 Or

 The uplink access signal sequence frequency domain location set 0 includes: the uplink access signal uses the uplink access signal set 0 sequence, the uplink access signal transmission time domain location 0, and the uplink access signal transmission frequency domain location 0.

 The uplink access signal sequence frequency domain location set 1 includes: the uplink access signal uses the uplink access signal set 0 sequence, the uplink access signal transmission time domain location 1 and the uplink access signal transmission frequency domain location 0.

 Or

 The uplink access signal sequence frequency domain location set 0 includes: the uplink access signal uses the uplink access signal set 0 sequence, the uplink access signal transmission time domain location 0, and the uplink access signal transmission frequency domain location 0.

 The uplink access signal sequence frequency domain location set 1 includes: the uplink access signal uses the uplink access signal set 0 sequence, the uplink access signal transmission time domain location 1 and the uplink access signal transmission frequency domain location 1.

 Or

The uplink access signal sequence frequency domain location set 0 includes: the uplink access signal uses a sequence of uplink access signal set 0, and the uplink access signal transmits time domain location 0 and uplink access signal transmission The frequency domain position is 0.

 The uplink access signal sequence frequency domain location set 1 includes: the uplink access signal uses the uplink access signal set 1 sequence, the uplink access signal transmission time domain location 0, and the uplink access signal transmission frequency domain location 0.

 Or

 The uplink access signal sequence frequency domain location set 0 includes: the uplink access signal uses the uplink access signal set 0 sequence, the uplink access signal transmission time domain location 0, and the uplink access signal transmission frequency domain location 0.

 The uplink access signal sequence frequency domain location set 1 includes: the uplink access signal uses the uplink access signal set 1 sequence, the uplink access signal transmission time domain location 0, and the uplink access signal transmission frequency domain location 1.

 Or

 The uplink access signal sequence frequency domain location set 0 includes: the uplink access signal uses the uplink access signal set 0 sequence, the uplink access signal transmission time domain location 0, and the uplink access signal transmission frequency domain location 0.

 The uplink access signal sequence frequency domain location set 1 includes: the uplink access signal uses the uplink access signal set 1 sequence, the uplink access signal transmission time domain location 1 and the uplink access signal transmission frequency domain location 0.

 Or

 The uplink access signal sequence frequency domain location set 0 includes: the uplink access signal uses the uplink access signal set 0 sequence, the uplink access signal transmission time domain location 0, and the uplink access signal transmission frequency domain location 0.

The uplink access signal sequence frequency domain location set 1 includes: the uplink access signal uses a sequence in the uplink access signal set 1, the uplink access signal transmission time domain location 1 and the uplink access signal transmission frequency domain location 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, which can substantially cover the area that the base station needs to cover. The base station and the terminal pre-define 8 uplink access signal sequences and time domain and frequency domain joint location sets respectively corresponding to 8 downlink beam indexes, or notify the terminal 8 uplink access signal sequences and time domain and frequency domain through system messages. The correspondence between the joint location set and the 8 downlink beam indexes is as shown in Table 15.

 Table 15

 The terminal obtains an optimal downlink beam index of 6 by detecting the downlink signal, and the terminal selects the sequence of the uplink access signal sequence set in the sequence and the time domain and the frequency domain joint location set 6 and the time domain and frequency domain location transmission. Uplink access signal.

The base station detects the set of the sequence of the uplink access signal and the corresponding time domain location and frequency domain location, and the base station detects the uplink access signal sequence set and the corresponding time domain location and frequency of the uplink access signal sequence. The domain location is the uplink access signal sequence and the time domain and the frequency domain location in the time domain and frequency domain joint location set 6. The base station obtains the downlink beam index fed back by the terminal, and obtains the downlink beam index fed back by the terminal. The base station sends an optimal beam of downlink data to the terminal. Sub-example 2:

 It is assumed that the base station uses 10 downlink beams to transmit downlink synchronization signals and/or downlink system information, which can substantially cover the 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 location sets respectively corresponding to 10 downlink beam indexes, or the base station notifies the terminal 10 uplink access signal sequences and time domain and frequency domain through system messages. The correspondence between the joint location set and the 10 downlink beam indexes is as shown in Table 16.

 Table 16

 The terminal obtains an optimal downlink beam index of 6 by detecting the downlink signal, and the terminal selects the sequence in the uplink access signal sequence set in the sequence and the time domain and the frequency domain joint location set 6 in the time domain and the frequency domain. The uplink access signal is sent in the time domain and frequency domain locations corresponding to the joint location set 6.

The base station detects the set of the sequence of the uplink access signal and the corresponding time domain location and frequency domain location, and when the base station detects that the uplink access signal sequence is located, and the corresponding time domain location and frequency domain location are uplink In-signal sequence and time domain, frequency domain joint location set 6 For the column and the time domain and the frequency domain, the base station obtains the downlink beam index fed back by the terminal, and obtains the optimal beam for the downlink data sent by the base station to the terminal according to the downlink beam index fed back by the terminal.

 Example 8

 It is assumed that the base station uses the N downlink beams to transmit downlink synchronization signals and/or downlink system information, which can substantially cover the area that the base station needs to cover. The base station and the terminal predefine the uplink access signal sequence set, the time domain location and the frequency domain location, or the base station informs the terminal of the uplink access signal sequence set, the time domain location and the frequency domain location by using the system message. In addition, the terminal needs to carry the feedback downlink beam index bit or beam identification sequence after transmitting the uplink access signal, as shown in FIG. 5 . For example, the terminal transmits a downlink beam index bit in a predefined or configured time domain and/or frequency domain after transmitting the access signal. Alternatively, after transmitting the access signal, the terminal sends a beam identification sequence carrying a feedback beam index in a predefined or configured time domain and/or frequency domain, and different beam identification sequence sets may correspond to different downlink beam indexes. At least one sequence is included in each downlink beam identification sequence set. The correspondence between the beam identification sequence set and the feedback beam index may be determined in a predetermined manner, or the base station notifies the terminal by using a system message.

 Some combinations may be generated between the schemes of the foregoing embodiments in some combination. For example, the schemes of Embodiment 7 and Embodiment 8 may be utilized, and the time domain, the frequency domain location, and the used sequence of the uplink access signal may be utilized. To identify part of the feedback beam, another part of the information is indicated by information bits or beam identification sequences following the uplink access signal. Combinations of the various aspects of the invention are within the scope of the invention.

 The uplink access signal in the LTE system may be a random access signal in the LTE system, and the sequence is a random access signal Preamble sequence or a newly designed uplink access signal or an uplink access sequence, as long as uplink access is available. Signals and sequences of functional and/or uplink synchronization functions are within the scope of the present invention.

There are many ways for the terminal to detect the optimal sequence in the present invention, which are implementation methods of detection. For example, in a sequence-dependent manner, the sequence index with the highest correlation value is selected for feedback. Different criteria may select different sequence indices, and there is no limiting relationship to the invention of the present invention. Regardless of the detection method used, only one or several optimal values are required, and the index values can be correspondingly included in the scope of the protection idea of the present invention.

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

 The base station notifies the at least one beam indication mode and related configuration information when initiating the uplink access signal by using a predetermined manner and/or system information to indirectly indicate the downlink beam index that needs to be fed back:

 时 using the time domain location of the uplink access signal to indicate the downlink beam index of the feedback;

 频 using the frequency domain location of the uplink access signal to indicate the downlink beam index of the feedback;

 上行 using an uplink access signal sequence to indicate a downlink beam index of the feedback;

 Adding index indication bit information after the uplink access signal to indicate the downlink beam index of the feedback;

 After the uplink access signal, a beam identification sequence is added to indicate the downlink beam index of the feedback; and the downlink beam index is a beam index corresponding to the downlink signal transmitted by using the beam.

 In summary, whether the method, the device or the system, in the present invention, the manner in which the terminal pre-defines or receives the system message configuration information is based on different time domain locations and/or different frequency domain locations and/or uplink access. The difference in signal sequence is used to feed back the downlink beam index. The base station obtains the downlink beam index of the terminal feedback by identifying the time domain location and/or frequency domain location and/or sequence used by the uplink access signal. In this way, the base station can obtain the optimal downlink beam of the terminal, thereby ensuring reliable transmission of subsequent downlink control information.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Industrial applicability

 The method for implementing the downlink beam index processing in the embodiment of the present invention includes: the base station notifying the following at least one beam indication manner and related configuration when transmitting the uplink access signal by using a predefined manner and/or system information The information indirectly indicates the downlink beam index that needs to be fed back: 指示 use the time domain position of the uplink access signal to indicate the downlink beam index of the feedback; 釆 use the frequency domain position of the uplink access signal to indicate the downlink beam index of the feedback; Accessing the signal sequence to indicate the downlink beam index of the feedback; adding the index indication bit information to indicate the downlink beam index of the feedback after the uplink access signal; adding a beam identification sequence to indicate the downlink beam index of the feedback after the uplink access signal; The downlink beam index is a beam index corresponding to the downlink signal transmitted by the beam, and the embodiment of the present invention can ensure reliable transmission of subsequent downlink control information.

Claims

claims

1. A method for implementing downlink beam index processing. The method includes:

When the base station sends an uplink access signal through a predefined method and/or system information notification, it uses at least one of the following beam indication methods and related configuration information to indirectly indicate the downlink beam index that needs to be fed back:

The time domain position of the uplink access signal is used to indicate the fed back downlink beam index;

The frequency domain position of the uplink access signal is used to indicate the fed back downlink beam index;

Use the uplink access signal sequence to indicate the fed back downlink beam index;

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

A beam identification sequence is added after the uplink access signal to indicate the fed back downlink beam index; the downlink beam index is the beam index corresponding to the beam used to send the downlink signal.

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

Detect uplink access signals at predefined time domain locations;

Detect uplink access signals at predefined frequency domain locations;

Detect the code sequence used in the uplink access signal according to the predefined uplink access signal sequence set; detect the downlink beam index indication bit information carried in the uplink access signal;

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

3. The method according to claim 1 or 2, wherein the method further includes:

The base station uses a predefined method to detect the uplink access signal according to the beam identification method.

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

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

6. The method according to claim 1 or 2, wherein the method further includes: when the base station uses the time domain position of the uplink access signal to identify the fed back downlink beam index, the base station configures the system through system messages. The correspondence between the time domain position of the uplink access signal and the downlink beam index is added to the message.

7. The method according to claim 1 or 2, wherein the method further includes: when the base station uses the frequency domain position of the uplink access signal to identify the feedback downlink beam index, the base station configures the system through system messages. The correspondence between the frequency domain position of the uplink access signal and the downlink beam index is added to the message.

8. The method according to claim 1 or 2, wherein the method further includes: when the base station uses the uplink access signal sequence to identify the fed back downlink beam index, the base station adds to the system message through system message configuration. The corresponding relationship between the uplink access signal sequence set and the downlink beam index, where an uplink access signal sequence set includes at least one uplink access signal sequence.

9. A method for implementing downlink beam index processing. The method includes:

The terminal learns in a predefined manner and/or receives system information to use at least one of the following beam indication methods and related configuration information to feedback the downlink beam index using the uplink discovery signal:

The time domain position of the uplink access signal is used to indicate the downlink beam index fed back by the terminal; the frequency domain position of the uplink access signal is used to indicate the downlink beam index fed back by the terminal; the uplink access signal sequence is used to indicate which one the uplink access signal sequence belongs to A set of uplink access signal sequences to indicate the downlink beam index fed back by the terminal;

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

The identification sequence after the uplink access signal indicates the downlink beam index fed back by the terminal; the downlink beam index refers to the beam index corresponding to the optimal downlink beam signal selected according to specific rules by receiving the downlink signal.

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

Send uplink access signals at predefined time domain positions;

Send uplink access signals at predefined frequency domain positions;

Adopt a predefined set of uplink access signal sequences, and select one or more sequences in the predefined set to send the uplink access signal;

When sending an uplink access signal, it carries bit information indicating the downlink beam index; when sending an uplink access signal, it sends a beam identification sequence to indicate the feedback downlink beam index.

11. The method according to claim 9 or 10, wherein the method further includes: the terminal obtains the beam indication mode in a predefined way.

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

13. The method according to claim 9 or 10, wherein the method further includes: when the terminal uses the time domain position to feed back the downlink beam index, the terminal obtains the time domain in the system message by receiving the system message configuration. Correspondence between position and downlink beam index.

14. The method according to claim 9 or 10, wherein the method further includes: when the terminal uses the frequency domain position to feed back the downlink beam index, the terminal obtains the frequency domain in the system message by receiving the system message configuration. Correspondence between position and downlink beam index.

15. The method according to claim 9 or 10, wherein the method further includes: when the terminal uses the uplink access signal sequence to feed back the downlink beam index, the terminal obtains the system message configuration by receiving the system message configuration. The corresponding relationship between the uplink access signal sequence set and the downlink beam index, where an uplink access signal sequence set includes at least one uplink access signal sequence.

16. A device for implementing downlink beam index processing, the device is a base station; the base station is configured as: When sending an uplink access signal through a predefined method and/or system information notification, at least one of the following beam indication methods and related configuration information is used to indirectly indicate the downlink beam index that needs to be fed back:

The time domain position of the uplink access signal is used to indicate the fed back downlink beam index;

The frequency domain position of the uplink access signal is used to indicate the fed back downlink beam index;

Use the uplink access signal sequence to indicate the fed back downlink beam index;

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

A beam identification sequence is added after the uplink access signal to indicate the fed back downlink beam index; the downlink beam index refers to the beam index corresponding to the beam used to send the downlink signal.

17. The device according to claim 16, wherein the base station is further configured to obtain the feedback downlink beam index in a predefined manner using at least one of the following beam identification methods: detecting a predefined time domain position Uplink access signal;

Detect uplink access signals at predefined frequency domain locations;

Detect the code sequence used in the uplink access signal according to the predefined uplink access signal sequence set; detect the feedback downlink beam index indication bit information carried by the uplink access signal; detect the beam identification sequence after the uplink access signal.

18. The device according to claim 16 or 17, wherein the base station is further configured to: use a predefined method to detect the uplink access signal according to the beam identification method.

19. The apparatus according to claim 16, wherein the base station is further configured to: notify the adopted beam indication method by using a system message configuration method.

20. The device according to claim 19, wherein the base station is further configured to: the system message sent using S types of beams carries N types of beam indication mode configuration information, where S>0, N>0.

21. The device according to claim 16 or 17, wherein the base station is further configured to: when the base station uses the time domain position of the uplink access signal to identify the fed back downlink beam index, Through system message configuration, the corresponding relationship between the time domain position of the uplink access signal and the downlink beam index is added to the system message.

22. The device according to claim 16 or 17, wherein the base station is further configured to: when the base station uses the frequency domain position of the uplink access signal to identify the fed back downlink beam index, configure the system message in the The corresponding relationship between the frequency domain position of the uplink access signal and the downlink beam index is added to the system message.

23. The device according to claim 16 or 17, wherein the base station is further configured to: when the base station uses the uplink access signal sequence to identify the fed back downlink beam index, configure the system message in the system message. A corresponding relationship between the uplink access signal sequence set and the downlink beam index is added, where an uplink access signal sequence set includes at least one uplink access signal sequence.

24. A device for implementing downlink beam index processing, the device is a terminal; the terminal is configured as:

Learn through predefined methods and/or receive system information to use at least one of the following beam indication methods and related configuration information to feedback the downlink beam index using the uplink discovery signal:

The time domain position of the uplink access signal is used to indicate the downlink beam index fed back by the terminal; the frequency domain position of the uplink access signal is used to indicate the downlink beam index fed back by the terminal; the uplink access signal sequence is used to indicate which one the uplink access signal sequence belongs to A set of uplink access signal sequences to indicate the downlink beam index fed back by the terminal;

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

The identification sequence after the uplink access signal indicates the downlink beam index fed back by the terminal; the downlink beam index refers to the beam index corresponding to the optimal downlink beam signal selected according to specific rules by receiving the downlink signal.

25. The device according to claim 24, wherein the terminal is further configured to In a defined manner, at least one of the following beam indication methods is adopted to carry the feedback downlink beam index information:

Send uplink access signals at predefined time domain positions;

Send uplink access signals at predefined frequency domain positions;

Adopt a predefined set of uplink access signal sequences, and select one or more sequences in the predefined set to send the uplink access signal;

When sending an uplink access signal, it carries bit information indicating the downlink beam index; when sending an uplink access signal, it sends a beam identification sequence to indicate the feedback downlink beam index.

26. The device according to claim 24 or 25, wherein the terminal is further configured to: obtain the beam indication mode in a predefined way.

27. The device according to claim 24, wherein the terminal is further configured to obtain the beam indication mode by receiving system message configuration.

28. The device according to claim 24 or 25, wherein the terminal is further configured to: when the terminal uses the time domain position to feed back the downlink beam index, adopt the method of receiving the system message configuration, and obtain it in the system message. Correspondence between domain position and downlink beam index.

29. The device according to claim 24 or 25, wherein the terminal is further configured to: when the terminal uses the frequency domain position to feed back the downlink beam index, obtain the frequency in the system message by receiving the system message configuration. Correspondence between domain position and downlink beam index.

30. The device according to claim 24 or 25, wherein the terminal is further configured to: when the terminal uses the uplink access signal sequence to feed back the downlink beam index, adopt the method of receiving system message configuration, in the system message The corresponding relationship between the uplink access signal sequence set and the downlink beam index is obtained, where an uplink access signal sequence set includes at least one uplink access signal sequence.

31. A system for implementing downlink beam index processing. The system includes a base station and a terminal; wherein, The base station is configured as:

When sending uplink access signals through predefined methods and/or system information notifications, at least one of the following beam indication methods and related configuration information are used to indirectly indicate the downlink beam index that needs to be fed back:

The time domain position of the uplink access signal is used to indicate the fed back downlink beam index;

The frequency domain position of the uplink access signal is used to indicate the fed back downlink beam index;

Use the uplink access signal sequence to indicate the fed back downlink beam index;

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

A beam identification sequence is added after the uplink access signal to indicate the fed back downlink beam index; the terminal is configured as:

Learn through predefined methods and/or receive system information to use at least one of the following beam indication methods and related configuration information to feedback the downlink beam index using the uplink discovery signal:

The time domain position of the uplink access signal is used to indicate the feedback downlink beam index; the frequency domain position of the uplink access signal is used to indicate the feedback downlink beam index; which uplink access signal sequence the uplink access signal sequence belongs to is used input signal sequence set to indicate the feedback downlink beam index, where an uplink access signal sequence set includes at least one uplink access signal sequence;

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

The identification sequence after the uplink access signal to indicate the feedback downlink beam index 1;

Wherein, the downlink beam index is a beam index corresponding to using a beam to transmit a downlink signal.