CN107360625B

CN107360625B - Data transmission method and device

Info

Publication number: CN107360625B
Application number: CN201610301587.9A
Authority: CN
Inventors: 张峻峰; 郝鹏; 鲁照华; 刘星
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-05-09
Filing date: 2016-05-09
Publication date: 2023-04-18
Anticipated expiration: 2036-05-09
Also published as: WO2017193773A1; CN107360625A

Abstract

Disclosed herein are a method and apparatus for transmitting data, the method may include: the first device determines a reference signal configuration for transmitting data; the first device informs the second device of the determined reference signal configuration; wherein the reference signal configuration is a reference signal configuration of a beam, an antenna port, or a sector, the beam selects a transmit beam and/or a receive beam for the first device to transmit data, the antenna port selects an antenna port for the first device to transmit data, and the sector selects a sector for the first device to transmit data. The data transmission method and the data transmission device enable two pieces of equipment for transmitting data to transmit data more reasonably by using wireless energy, improve the data transmission rate and avoid transmission errors.

Description

Data transmission method and device

Technical Field

The present invention relates to the field of wireless communications, and in particular, to a method and an apparatus for transmitting data.

Background

The new generation mobile communication system will carry on the systematic network deployment on the carrier frequency higher than 2G, 3G, 4G system used frequency, the frequency band that is got the industry to be extensively recognized and international organization's affirmation at present is 3 GHz-6 GHz and 6 GHz-100 GHz, this frequency band basically belongs to centimetre wave band and millimeter wave band, its propagation characteristic has obvious difference with lower frequency band, because the propagation loss of the high frequency band is obviously greater than the low frequency band, therefore the coverage of the high frequency band is usually far smaller than the coverage of the low frequency band. In order to enhance the coverage of high frequency band, beam forming technology is generally used to narrow the energy of wireless signals, and more focus on devices that need to communicate with each other.

Because of the narrow beams, beam training is required to select the best or sub-best beam in order to accurately focus the beam on the device requiring communication. The typical scenes of the beam training are as follows, the first is to search available beams without any beam information in the initial access process; the second is that more accurate searching and training are required in the communication process after access, because in the first beam training, in order to reduce access delay, the beam searching does not necessarily select the optimal beam, but only selects the available beam; the third scenario is a beam maintaining and tracking function, and due to movement of the terminal or changes in the surrounding environment, the optimal beam also needs to be adjusted.

The beam training process for determining the preferred downlink transmit beam is shown in fig. 1: the base station (eNodeB) transmits training signals in each downlink transmission beam direction, and the terminal measures and selects the downlink transmission beam index with the best receiving quality to feed back to the base station to complete the downlink transmission beam training process.

In a general case, the terminal measures a beam and determines an optimal downlink transmission beam through comparison, and feeds back an index or an identifier of the optimal downlink transmission beam to the base station, and the base station selects the beam marked by the index or the identifier to perform corresponding transmission, such as the beam a in fig. 1. Correspondingly, the optimal receiving beam used by the terminal is determined by the terminal, and the optimal receiving beam has strong association with the downlink transmitting beam in a certain period of time under an unchanged scene, for example, the downlink optimal receiving beam is a or the downlink suboptimum receiving beam B, and the downlink optimal receiving beam is B. If the base station does not transmit data on the selected a-beam, it is not reasonable for the terminal to still assume that the a-beam is to receive. Under a more reliable condition, the base station only takes the optimal downlink transmission beam reported by the terminal as a reference, and actually executes the optimal beam transmission without selecting historical feedback due to factors such as load balance among beams, interference suppression, beam prediction under a mobile condition and the like, at this time, the terminal needs to know corresponding changes and selects the corresponding optimal receiving beam, and if the base station selects the B beam, the terminal receives by using the B beam. While the selection of the beam will directly affect the quality of the data transmission between the base station and the terminal.

The beam is an image description of wireless energy convergence, and further, it is extended that the sector is used as a description of energy distribution of fixed pointing of the antenna when the traditional base station system is networked, and actually, the sector is also a beam in a broad sense. Whereas a beam is more often described equivalently by a specific physical or logical antenna port. How to more reasonably utilize wireless energy (such as beams, sectors or wireless ports) to transmit data between a base station and a terminal is an urgent problem to be solved.

Disclosure of Invention

In order to solve the above technical problem, the present invention provides a method and an apparatus for transmitting data.

In order to achieve the object of the present invention, the present invention provides a method for transmitting data, comprising:

the first device determines a reference signal configuration for transmitting data;

the first device informs the second device of the determined reference signal configuration;

wherein the reference signal configuration is a reference signal configuration of a beam, an antenna port, or a sector, the beam selecting a transmit beam and/or a receive beam for the first device to transmit data, the antenna port selecting an antenna port for the first device to transmit data, and the sector selecting a sector for the first device to transmit data.

Wherein, after notifying the determined reference signal configuration to the second device, the method further comprises: transmitting data between the first device and the second device using the determined reference signal configuration.

Before the determining the reference signal configuration for transmitting data, the method further comprises:

the first device obtains a measurement result from the second device, or obtains the measurement result by measuring a training signal from the second device;

the measurement result comprises a preferred beam set, a preferred antenna port set or a preferred sector set, the preferred beam set comprising information of at least one beam, the preferred antenna port set comprising information of at least one antenna port, the preferred sector set comprising information of at least one sector.

Wherein the first device notifies the second device of the reference signal configuration through control information.

Wherein the control information is carried by a physical control signal or a higher layer control signal.

Wherein the physical control signal is a downlink physical control signal or an uplink physical control signal.

And the first equipment informs the second equipment of the reference signal configuration in a display mode or an implicit mode.

Wherein the first device notifies the reference signal configuration to the second device in an implicit manner, including:

the first device sets a reference signal pattern or a reference signal sequence on a control channel, and the reference signal pattern or the reference signal sequence and the reference signal are configured in a one-to-one mapping relationship.

Wherein the higher layer control signal is a radio resource management signaling or a broadcast signal.

Wherein the notifying the determined reference signal configuration to the second device specifically includes:

and the first device informs the second device of the determined reference signal configuration when judging that the determined reference signal configuration is different from the reference signal configuration used for transmitting data to the second device.

when the beam corresponding to the determined reference signal configuration is not the optimal beam in the measurement result, or when the antenna port corresponding to the determined reference signal configuration is not the optimal antenna port in the measurement result, or when the sector corresponding to the determined reference signal configuration is not the optimal sector in the measurement result, notifying the second device of the reference signal configuration.

The first equipment is a base station, and the second equipment is a terminal; or, the first device is a terminal, and the second device is a base station; or, the first device and the second device are both terminals.

The embodiment of the invention also provides a method for transmitting data, which comprises the following steps:

the second equipment obtains a measurement result and reports the measurement result to the first equipment;

a second device receiving a notification of the first device, the notification including a reference signal configuration for transmitting data;

wherein the reference signal configuration is a reference signal configuration of a beam, an antenna port, or a sector, the beam selects a transmit beam and/or a receive beam for the first device to transmit data, the antenna port selects an antenna port for the first device to transmit data, and the sector selects a sector for the first device to transmit data.

Wherein, after the second device receives the notification of the first device, the method further includes: configuring transmission data between the second device and the first device by using the reference signals in the notification; the reference signal configuration for transmitting data is a reference signal configuration used by the first device to transmit data, or a reference signal configuration used by the second device to transmit data.

Wherein the obtaining of the measurement result by the second device comprises: the second equipment receives the training signal transmitted by the first equipment, measures and obtains the measurement result; the measurement result includes a preferred beam set, a preferred antenna port set, or a preferred sector set, the preferred beam set including information of at least one beam, the preferred antenna port set including information of at least one antenna port, and the preferred sector set including information of at least one sector.

the second device transmits training signals to the first device on multiple transmit beam directions or multiple antenna ports or multiple sectors;

Wherein after the second device receives the notification of the first device, the method further comprises: configuring transmission data between the second device and the first device by using the reference signal in the notification;

the reference signal configuration for transmitting data is a reference signal configuration used by the first device to transmit data, or a reference signal configuration used by the second device to transmit data.

An embodiment of the present invention further provides a first apparatus for transmitting data, including:

a determining module for determining a reference signal configuration for transmitting data;

a notification module for notifying the determined reference signal configuration to a second device;

wherein the reference signal configuration is a reference signal configuration of a beam, an antenna port or a sector, the beam is a transmission beam and/or a reception beam selected by the determination module for transmitting data, the antenna port is an antenna port selected by the determination module for transmitting data, and the sector is a sector selected by the determination module for transmitting data.

Wherein, still include: a first transmission module to transmit data to the second device using the determined reference signal configuration; the reference signal configuration for transmitting data is a reference signal configuration used by the first transmission module to transmit data, or a reference signal configuration used by the second device to transmit data.

Wherein, still include: an obtaining module, configured to obtain a measurement result from the second device, or obtain the measurement result by measuring a training signal from the second device; the measurement result comprises a preferred beam set, a preferred antenna port set or a preferred sector set, the preferred beam set comprising information of at least one beam, the preferred antenna port set comprising information of at least one antenna port, the preferred sector set comprising information of at least one sector.

The notification module is specifically configured to notify the reference signal configuration to a second device through control information.

The notification module is specifically configured to notify the second device of the reference signal configuration in a display manner or an implicit manner.

The notification module is specifically configured to set a reference signal pattern or a reference signal sequence in a control channel, where the reference signal pattern or the reference signal sequence and the reference signal configuration are mapped one to one.

The notification module is specifically configured to notify the second device of the determined reference signal configuration when it is determined that the determined reference signal configuration is different from a reference signal configuration used for data transmission to the second device; and/or, specifically, when the beam corresponding to the determined reference signal configuration is not the optimal beam in the measurement result, or when the antenna port corresponding to the determined reference signal configuration is not the optimal antenna port in the measurement result, or when the sector corresponding to the determined reference signal configuration is not the optimal sector in the measurement result, notifying the second device of the reference signal configuration.

Wherein the first means for transmitting data is configured at a first device; the first device is a base station and the second device is a terminal; or, the first device is a terminal, and the second device is a base station; or, the first device and the second device are both terminals.

An embodiment of the present invention further provides a second apparatus for transmitting data, including:

the measuring module is used for obtaining a measuring result and reporting the measuring result to the first equipment;

a first receiving module, configured to receive a notification of the first device, where the notification includes a reference signal configuration for transmitting data;

Wherein, still include: a second transmission module to transmit data to the first device using the reference signal configuration in the notification;

the reference signal configuration for transmitting data is a reference signal configuration used by the first device to transmit data, or a reference signal configuration used by the second transmission module to transmit data.

The measurement module is specifically configured to receive a training signal transmitted by the first device, measure, and obtain the measurement result;

wherein the measurement result comprises a preferred beam set, a preferred antenna port set or a preferred sector set, the preferred beam set comprises information of at least one beam, the preferred antenna port set comprises information of at least one antenna port, and the preferred sector set comprises information of at least one sector.

An embodiment of the present invention further provides a third apparatus for transmitting data, including:

a transmitting module for transmitting training signals to a first device in a plurality of transmit beam directions or on a plurality of antenna ports or on a plurality of sectors;

a second receiving module, configured to receive a notification of the first device, where the notification includes a reference signal configuration for transmitting data;

Wherein, still include: a third transmission module to transmit data to the first device using the reference signal configuration in the notification; the reference signal configuration for transmitting data is a reference signal configuration used by the first device to transmit data, or a reference signal configuration used by the third transmission module to transmit data.

According to the method and the device for transmitting data, the reference signal configuration for transmitting data is determined firstly, and then the determined reference signal configuration is notified to the corresponding equipment, so that the equipment of the two parties transmitting the data can transmit the data more reasonably by using wireless energy, the data transmission rate is improved, and the transmission error can be avoided.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.

Fig. 1 is a schematic diagram of a downlink transmit beam training process;

FIG. 2 is a flowchart illustrating a method for transmitting data according to an embodiment of the present invention;

FIG. 3 is a flowchart illustrating a method for transmitting data according to another embodiment of the present invention;

FIG. 4 is a flowchart illustrating a method for transmitting data according to another embodiment of the present invention;

FIG. 5 is an interactive illustration of a downlink transmit beam selection according to an embodiment of the present invention;

fig. 6 is an interaction diagram of uplink transmission beam selection between a terminal and a base station according to a second embodiment of the present invention;

fig. 7 is an interaction diagram of uplink transmission beam selection between a terminal and a base station according to a third embodiment of the present invention;

fig. 8 is an interaction diagram of uplink transmission beam selection between four terminals according to an embodiment of the present invention;

FIG. 9 is a diagram illustrating the structure and interaction of a first apparatus for transmitting data according to an embodiment of the present invention;

FIG. 10 is a diagram illustrating the structure and interaction of a second apparatus for transmitting data according to an embodiment of the present invention;

fig. 11 is a schematic diagram illustrating a structure and an interaction of a third apparatus for transmitting data according to an embodiment of the invention.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.

As shown in fig. 2, an embodiment of the present invention provides a method for transmitting data, where the method may include:

step 201: the first device determines a reference signal configuration for transmitting data;

step 202: the first device informs the second device of the determined reference signal configuration.

After step 202, the method further comprises: step 203, transmitting data between the first device and the second device by using the determined reference signal configuration.

Before step 201, the method may further include: step 200, the first device obtains a measurement result from the second device, or obtains the measurement result by measuring a training signal from the second device; the measurement result comprises a preferred beam set, a preferred antenna port set or a preferred sector set, the preferred beam set comprising information of at least one beam, the preferred antenna port set comprising information of at least one antenna port, the preferred sector set comprising information of at least one sector.

Specifically, the first device may notify the second device of the reference signal configuration through control information. Wherein the control information may be carried by a physical control signal or a higher layer control signal. The physical control signal may be a downlink physical control signal or an uplink physical control signal. The higher layer control signal may be a radio resource management signaling or a broadcast signal.

And the first equipment informs the second equipment of the reference signal configuration in a display mode or an implicit mode. Specifically, the notifying, by the first device, the reference signal configuration to the second device in an implicit manner includes: the first equipment sets a reference signal pattern or a reference signal sequence on a control channel, and the reference signal pattern or the reference signal sequence and the reference signal are configured in a one-to-one mapping relation. Thus, the second device can obtain the reference signal configuration for data transmission according to the reference signal pattern or the reference signal sequence of the control channel.

Wherein the reference signal configuration used by the control information is different from the reference signal configuration used by the data transmission. The reference signal configuration used for data transmission may be a reference signal configuration used for data transmitted by the first device or data transmitted by the second device. As mentioned before, the reference signal configuration may be a number or index of a beam, an antenna port, a sector or resource configuration information. The radio resources such as beams carrying control information and the radio resources such as beams carrying data are separate and different. Bearer data transfer refers to the transmission of data bi-directionally between two devices, possibly from a first device to a second device, and possibly from the second device to the first device.

Wherein, the step 202 may specifically be: and the first device informs the second device of the determined reference signal configuration when judging that the determined reference signal configuration is different from the reference signal configuration used for transmitting data to the second device. Here, the reference signal configuration needs to be periodically or aperiodically adjusted and changed as the terminal moves or the propagation environment changes, and if the system determines the reference signal configuration according to the period, the same configuration as the reference signal configuration of the previous period is found, no notification is performed, and if the reference signal configuration is not consistent, the notification is performed. That is, the above-mentioned "reference signal configuration used for previously transmitting data to the second device" may be "reference signal configuration used for transmitting data to the second device in the last cycle".

The notifying of the determined reference signal configuration to the second device may specifically be: when the beam corresponding to the determined reference signal configuration is not the optimal beam in the measurement result, or when the antenna port corresponding to the determined reference signal configuration is not the optimal antenna port in the measurement result, or when the sector corresponding to the determined reference signal configuration is not the optimal sector in the measurement result, notifying the second device of the reference signal configuration. Since the second device defaults that the beam for currently transmitting data is the optimal beam in the measurement results, or the antenna port for currently transmitting data is the optimal antenna port in the measurement results, or the sector for currently transmitting data is the optimal sector in the measurement results under the condition that the first device does not notify, the first device can notify the second device only when the selected beam, antenna port or sector is not optimal, and thus, the signaling overhead is saved.

As shown in fig. 3, an embodiment of the present invention further provides a method for transmitting data, including:

step 301: the second equipment obtains the measurement result and reports the measurement result to the first equipment;

step 302: the second device receives a notification of the first device, the notification including a reference signal configuration for transmitting data.

After the step 302, the second device receives the notification of the first device, the method further includes: step 303, configuring transmission data between the second device and the first device by using the reference signal in the notification; the reference signal configuration for transmitting data is a reference signal configuration used by the first device to transmit data or a reference signal configuration used by the second device to transmit data.

In step 301, the obtaining, by the second device, a measurement result includes: the second equipment receives the training signal transmitted by the first equipment, measures and obtains the measurement result; the measurement result comprises a preferred beam set, a preferred antenna port set or a preferred sector set, the preferred beam set comprising information of at least one beam, the preferred antenna port set comprising information of at least one antenna port, the preferred sector set comprising information of at least one sector.

As shown in fig. 4, another method for transmitting data is provided in an embodiment of the present invention, including:

step 401: the second device transmits training signals to the first device on multiple transmit beam directions or multiple antenna ports or multiple sectors;

step 402: the second device receives a notification of the first device, the notification including a reference signal configuration for transmitting data.

Wherein, after the second device receives the notification of the first device in step 402, the method further includes: step 403, configuring transmission data between the second device and the first device by using the reference signal in the notification; the reference signal configuration for transmitting data is a reference signal configuration used by the first device to transmit data, or a reference signal configuration used by the second device to transmit data.

In the above method, the first device is a base station, and the second device is a terminal; or, the first device is a terminal, and the second device is a base station; or, the first device and the second device are both terminals.

It should be noted that, if the second device does not receive the reference signal configuration of the transmission beam, the beam or antenna port or sector with the best reception quality in the default measurement of the second device is the beam or antenna port or sector currently used by the first device for transmitting data. The second device defaults to adopt the beam or antenna port or sector with the optimal receiving quality. Alternatively, the second device continues to use the reference signal configuration last notified by the first device by default.

The following describes a specific implementation process of the method for transmitting data according to the embodiment of the present invention in different scenarios in detail by using specific embodiments.

Example one

In this embodiment, the base station notifies the downlink optimized transmit beam to the terminal, so that the terminal can timely know the transmit beam change of the base station. As shown in fig. 5, the method flow of the present embodiment may include:

step 501, a base station (eNodeB) transmits training signals in each downlink transmission beam direction, where the training signals may be synchronization signals, discovery signals, common pilot signals, and the like;

step 502, the terminal (UE) determines a preferred beam set and feeds back the preferred beam set to the base station;

the terminal receives the training signal, measures the training signal, selects one or more downlink transmitting beams with best receiving quality and better receiving quality according to the measuring result to form an optimal beam set, and feeds the optimal beam set back to the base station; the receiving quality is preferably the best receiving quality, and the determination method of the better receiving quality may be that the receiving quality is higher than a threshold, where the threshold is a pre-configured threshold.

Here, the preferred beam set fed back to the base station by the terminal may include marking information of the transmission beam, such as an identification or index of the transmission beam.

Step 503, the terminal feeds back the preferred beam set to the base station, the base station selects the optimized downlink transmission beam in the preferred beam set as the transmission beam for the current data transmission according to the load balance among the beams, the interference suppression, the beam prediction algorithm under the mobile condition, and the like,

here, the optimized downlink transmission beam selected by the base station may be the one with the best reception quality in the above-mentioned set (downlink transmission beam a in fig. 5), or may not be one of several transmission beams with better reception quality, such as downlink transmission beam B in fig. 5. In a special case, the base station may select a transmission beam other than the preferred beam set as the downlink transmission beam for currently transmitting data.

And step 504, the base station notifies the terminal of the reference signal configuration of the downlink transmission beam, the terminal receives the notification, acquires the downlink transmission beam B for the current data transmission of the base station, and selects the downlink reception beam B corresponding to the downlink transmission beam B as the reception beam for receiving the transmission data according to the corresponding relationship between the downlink transmission beam and the downlink reception beam acquired in the beam training.

The downlink receiving beam a corresponds to a downlink transmitting beam a, and the downlink receiving beam B corresponds to a downlink transmitting beam B.

And 505, the base station transmits data to the UE through the downlink transmit beam B, and the UE receives the transmitted data through the downlink receive beam B.

Since the demodulation of the data in the beam depends on the specific reference signal, the base station informs the terminal of the reference signal configuration when transmitting the beam in the above process. The reference signal configuration includes configuration information of a specific reference signal, resource allocation information of a beam-specific reference signal, and the like, and the configuration information of the reference signal may include, for example, a beam-specific reference signal identifier or index, an antenna port number, and the like. The resource allocation information of the beam-specific reference signal includes information of time, frequency, code, and power domain used by the reference signal.

The reference signal configuration includes a beam-related dedicated reference signal, and if both the base station and the terminal have beam capabilities, the beam needs to be used in pairs in the implementation process, that is, a transmission beam of the base station is paired with a reception beam of the terminal. The reference signal configuration notified by the base station may contain only the transmission beam-related information, or only the reception beam-related information, or both the transmission beam-related information and the reception beam-related information. That is, the reference signal configuration includes reference signal configuration information of a transmission beam and/or reference signal configuration information of a reception beam corresponding to the transmission beam. Beams and antenna ports, sectors are stated to be compatible or equivalent, then the reference signal configuration signaled by the base station can be signaled by the transmit antenna port of an individual base station, sector-related, or receive antenna port of an individual terminal, sector-related, or both.

The reference signal configuration may be used for the terminal to measure and feed back channel quality, or for the terminal to demodulate.

The base station may notify the selected Downlink transmission beam to the terminal through the control information, for example, may quickly track a change of a Physical Downlink Shared Channel (PDSCH) beam in a manner of notifying in real time through a Downlink control signaling (DL control grant), and notify a scene suitable for a slow change of the beam in a manner of notifying in a high-layer signaling.

Generally, the terminal may default the base station to select the optimal transmission beam in the preferred beam set, which means that if the base station selects the optimal transmission beam, the base station may not send a relevant notification to the terminal, and only performs the notification when the base station selects the non-optimal transmission beam, so as to achieve the purpose of saving signaling.

In general, the terminal may also default to the base station's choice to use the last signaled transmit beam actually configured for transmitting data. This means that if the base station selects the last used transmission beam, the base station may not send a relevant notification to the terminal, and only notify the terminal when the base station selects a transmission beam that is not used last time, so as to achieve the purpose of saving signaling.

In this embodiment, the reference signal configuration notified by the base station is carried on a control channel or a control signaling resource, but the reference signal used for measurement by the control channel or the control signaling itself does not necessarily need to be the same as the reference signal configuration used for demodulation or measurement used for data transmission. For example, the control channel may be a common beam having a wider beam pointing range than a data beam pointing to a specific terminal, in which case, if the terminal uses the common control beam in performing the measurement of the beam training, the most suitable beam used in actually transmitting data is not the optimal beam determined in the common control beam training with a certain probability, and at this time, the base station needs to inform the terminal of the transmission beam selected by the base station.

In practical applications, the notification mode may be performed in a control channel display or implicit mode. The display mode is that the plaintext embeds relevant signaling in a control channel and informs the optimized reference signal configuration used by data transmission. The implicit method is to perform notification in an implicit manner, which can save signaling overhead, and a typical implementation method is as follows: the base station may set different reference signal patterns or reference signal sequences on the control channel, and map the reference signal patterns or reference signal sequences with the reference signal configurations one to one (for example, the indexes or identifications of the reference signal configurations may be mapped one to one with the reference signal patterns or reference signal sequences), and the terminal performs control channel demodulation by attempting to decode the reference signals of different patterns or sequences on the control channel, and determines the reference signal configuration index or beam index related to data transmission according to the reference signal patterns or reference signal sequences. For example, the reference signal on the control channel beam 1 may be set as a pattern or sequence corresponding to the reference signal configuration index B according to the mapping relationship, and the terminal may obtain the reference signal configuration B corresponding to the transmission data by blindly detecting the pattern or sequence of the reference signal of the beam 1. Or when the terminal has the capability of multiple radio frequency channels, the terminal can simultaneously try to receive the control channels on the N beams, the beam corresponding to the control channel implicitly maps the beam of the data channel, and which control channel can be demodulated, which beam is implicitly used.

Example two

Similar to the downlink beam training, the uplink transmit beam of the terminal also needs to be trained. In this embodiment, a case where the base station notifies the uplink optimized transmission beam will be described in detail. As shown in fig. 6, the method flow of this embodiment may include:

601, the terminal transmits training signals in each uplink transmission beam direction, where the training signals may be random access signals, channel Sounding Reference Signals (SRS), uplink demodulation Reference signals, and the like;

step 602, the base station measures the training signal and obtains a preferred beam set;

603, the base station selects an optimized uplink transmitting beam for transmitting data in the preferred beam set according to load balance among beams, interference suppression, a beam prediction algorithm under the mobile condition and the like, and informs the terminal, and the terminal receives the notification;

in this embodiment, the uplink transmission beam selected by the base station is an uplink transmission beam B. In a special case, the base station may also select a beam of the non-preferred beam set as the uplink transmit beam for transmitting data.

And step 604, the terminal transmits data to the base station by using the uplink transmitting beam B selected by the base station.

In fig. 6, an uplink transmission beam a is an optimal uplink transmission beam, which corresponds to an uplink reception beam a; the uplink transmit beam B is the uplink transmit beam that the base station finally selects for transmitting data, and corresponds to the uplink receive beam B. And the base station receives the data transmitted by the terminal through the uplink receiving beam b.

The difference from the first embodiment is that the optimized uplink transmission beam is determined and notified, and the same as the first embodiment is that the base station is still the primary control end and is responsible for deciding and notifying the optimized transmission beam.

The reference signal configuration includes a beam-related dedicated reference signal, and if the terminal and the base station both have beam capabilities, the terminal and the base station need to use the beam in pairs in the beam implementation process, that is, the reference signal configuration includes a reference signal configuration of a transmit beam and a reference signal configuration of a receive beam. If the base station knows the optimized receiving beam before the notification, only the transmitting beam related reference signal configuration of the terminal is notified. The notified reference signal configuration can be used for the terminal to select the optimized beam transmission if only the reference signal configuration of the transmission beam. And the unreceived received reference signal configuration can be used for the base station to measure the uplink channel and feed back the channel quality, or used for the base station to demodulate.

In this embodiment, the base station may also notify the terminal of the selected uplink transmission beam in a real-time notification manner or a high-layer signaling manner through the DL control grant.

If the terminal does not receive the reference signal configuration notified by the base station, the terminal may consider that the optimal uplink transmission beam can be determined by the optimal downlink reception beam according to channel reciprocity.

EXAMPLE III

In this embodiment, a case where the terminal notifies the uplink optimized transmission beam will be described in detail. As shown in fig. 7, the method flow of this embodiment may include:

step 701, a terminal transmits training signals in each uplink transmission beam direction, wherein the training signals can be random access signals, SRS, uplink demodulation reference signals and the like;

step 702, a base station measures and obtains an optimal uplink transmitting beam set;

step 703, the base station feeds back the optimal uplink transmission beam set to the terminal;

step 704, the terminal selects an optimized uplink transmission beam for transmitting data from the optimal uplink transmission beam set, and notifies the base station of the reference signal configuration of the uplink transmission beam through an uplink signaling;

in a special case, the terminal may also select a beam in the non-transmission beam identification or index set as the optimized uplink transmission beam.

Step 705, the terminal transmits data to the base station using the uplink transmit beam.

In fig. 7, an uplink transmission beam a is an optimal uplink transmission beam, which corresponds to an uplink reception beam a; the uplink transmit beam B is the uplink transmit beam finally selected for transmitting data, and corresponds to the uplink receive beam B.

In this embodiment, a difference from the embodiment is that an optimized uplink transmission beam is determined and selected by the terminal, and the base station is only responsible for feeding back an alternative set. Compared with the two embodiments, the same is to determine the optimized uplink transmission beam, but the difference is that the terminal decides the optimized transmission beam to be used by itself in the present embodiment.

The reference signal configuration includes a beam-related dedicated reference signal, and if both the base station and the terminal have beam capabilities, the beam needs to be used in pairs in the implementation process, that is, a transmission beam of the base station is paired with a reception beam of the terminal. The signaled reference signal configuration may contain only transmit beam related information, or only receive beam related information, or both transmit beam related information and receive beam related information. That is, the reference signal configuration includes reference signal configuration information of a transmission beam and/or reference signal configuration information of a reception beam corresponding to the transmission beam.

Wherein the informed reference signal configuration can be used for the base station to measure and feed back channel quality or for the base station to demodulate.

The terminal also informs the base station of the selected optimized transmitting beam by Uplink (UL) control information in a real-time informing mode or a high-layer signaling mode.

Generally, the base station may default to select the optimal uplink transmission beam in the preferred beam set by the terminal, which means that if the terminal selects the optimal uplink transmission beam, the terminal may not send a relevant notification to the base station, and only performs the notification when the terminal selects a non-optimal uplink transmission beam, so that the purpose of saving signaling may be achieved.

In general, the base station may also default to selecting the last notified transmit beam that was actually configured for transmitting data to be used by the base station. This means that if the terminal selects the uplink transmission beam used last time, the terminal may not send a relevant notification to the base station, and only notify the base station when the terminal selects the uplink transmission beam not used last time, so as to achieve the purpose of saving signaling.

Example four

For the scenario of point-to-point communication (D2D), the terminal may also notify the finally selected transmission beam. In this embodiment, a process of selecting a beam and notifying between terminals will be described in detail. As shown in fig. 8, the method flow of this embodiment may include:

step 801, ue _1transmits training signals in each transmission beam direction, where the training signals may be Sounding signals, random access signals, SRS (Sounding RS) signals, demodulation reference signals, and the like;

step 802, obtaining an optimal transmitting beam set after UE_2 measurement;

step 803, UE _2informs UE 1 of this optimal transmit beam set;

step 804, the UE _1selects an optimized uplink transmit beam for transmitting data from the optimal transmit beam set, and the UE _1 notifies the UE _2 of the corresponding reference signal configuration through signaling;

in a special case, UE _1 may also select a beam in the non-optimal transmit beam set as an uplink transmit beam for transmitting data.

The UE _1 notifies the UE _2 of the reference signal configuration of the uplink transmit beam, the reference signal configuration of the uplink receive beam corresponding to the uplink transmit beam, or the reference signal configuration of the uplink transmit beam and the reference signal configuration of the uplink receive beam corresponding to the uplink transmit beam.

Step 805, UE _1transmits data to UE _2 using the uplink transmit beam.

In this embodiment, the difference from the previous embodiment is that the device here has only a terminal and no base station. However, the implementation scheme is basically the same as that in the first embodiment or the third embodiment, except that the implementation subject is different, in other words, the base station in the foregoing embodiment is replaced by a terminal in this embodiment, and the specific implementation process may refer to the description of the foregoing embodiment and is not described again.

In fig. 8, an uplink transmission beam a is an optimal uplink transmission beam, which corresponds to an uplink reception beam a; the uplink transmit beam B is the uplink transmit beam finally selected for transmitting data, and corresponds to the uplink receive beam B.

The first to fourth embodiments described above are also applicable to selecting antenna ports or sectors for data transmission, and the specific procedures are the same, except that the content included in the measurement results is different, and the specific content in the reference signal configuration is different. When selecting an antenna port to transmit data, the measurement result includes an optimal antenna port set, where the set at least includes information of the optimal antenna port (e.g., a number or an index of the antenna port), and may also include information of one or more antenna ports with better transmission quality, and the reference signal configuration includes a reference signal configuration of the antenna port. When the sector is selected to transmit data, the measurement result includes an optimal sector set, where the set at least includes information of the optimal sector (such as a sector number or an index, etc.), and may also include information of one or several sectors with better transmission quality, and the reference signal configuration includes a reference signal configuration of the sector. The optimal antenna port is the antenna port with the best transmission quality obtained by measuring the received signal, and the optimal sector is the sector with the best transmission quality obtained by measuring the received signal. In practice, a sector may be considered a fixed beam and its reference signal configuration may be considered a fixed beam's reference signal configuration. Conventional beams may be dynamically variable, and therefore, the reference signal configuration for a beam specifically includes not only information related to a fixed beam, but also information related to describing the dynamic change of the beam. Besides the beam-related content (different in form), the reference signal configuration of the antenna port may further include phase information about the antenna port.

As shown in fig. 9, an embodiment of the present invention further provides a first apparatus for transmitting data, including:

a determining module 91, configured to determine a reference signal configuration for transmitting data;

a notification module 92, configured to notify the second device of the determined reference signal configuration;

As shown in fig. 9, the first device may further include: an obtaining module 93, configured to obtain a measurement result from the second device, or obtain the measurement result by measuring a training signal from the second device; the measurement result comprises a preferred beam set, a preferred antenna port set or a preferred sector set, the preferred beam set comprising information of at least one beam, the preferred antenna port set comprising information of at least one antenna port, the preferred sector set comprising information of at least one sector.

As shown in fig. 9, the first device may further include: a first transmission module 94 for transmitting data to the second device using the determined reference signal configuration; the reference signal configuration for transmitting data is a reference signal configuration used by the first transmission module to transmit data, or a reference signal configuration used by the second device to transmit data.

The notifying module 92 may be specifically configured to notify the second device of the reference signal configuration through control information. . Wherein the control information may be carried by a physical control signal or a higher layer control signal. The physical control signal may be a downlink physical control signal or an uplink physical control signal. The higher layer control signal may be a radio resource management signaling or a broadcast signal.

The notifying module 92 may be specifically configured to notify the second device of the reference signal configuration in a display manner or an implicit manner. . For example, the notifying module 92 may be specifically configured to set a reference signal pattern or a reference signal sequence on a control channel, and map the reference signal pattern or the reference signal sequence with a reference signal configuration one to one. Thus, the second device can obtain the reference signal configuration for data transmission according to the reference signal pattern or the reference signal sequence of the control channel.

The notifying module 92 may be further specifically configured to notify the second device of the determined reference signal configuration when it is determined that the determined reference signal configuration is different from a reference signal configuration used for transmitting data to the second device; and/or, in particular, when the beam corresponding to the determined reference signal configuration is not the optimal beam in the measurement result, or when the antenna port corresponding to the determined reference signal configuration is not the optimal antenna port in the measurement result, or when the sector corresponding to the determined reference signal configuration is not the optimal sector in the measurement result, notifying the second device of the reference signal configuration.

As shown in fig. 10, an embodiment of the present invention further provides a second apparatus for transmitting data, including:

the measurement module 101 is configured to obtain a measurement result and report the measurement result to the first device;

a first receiving module 102, configured to receive a notification of the first device, where the notification includes a reference signal configuration for transmitting data;

As shown in fig. 10, the second device may further include: a second transmission module 103, configured to transmit data to the first device using the reference signal configuration in the notification; the reference signal configuration for transmitting data is a reference signal configuration used by the first device to transmit data, or a reference signal configuration used by the second transmission module to transmit data.

The measurement module 101 is specifically configured to receive a training signal transmitted by the first device, measure and obtain the measurement result; wherein the measurement result comprises a preferred beam set, a preferred antenna port set or a preferred sector set, the preferred beam set comprises information of at least one beam, the preferred antenna port set comprises information of at least one antenna port, and the preferred sector set comprises information of at least one sector.

As shown in fig. 11, an embodiment of the present invention further provides a third apparatus for transmitting data, including:

a transmitting module 111, configured to transmit training signals to a first device in multiple transmit beam directions or multiple antenna ports or multiple sectors;

a second receiving module 112, configured to receive a notification of the first device, where the notification includes a reference signal configuration for transmitting data.

As shown in fig. 11, the third device may further include: a third transmitting module 113, configured to transmit data to the first device using the reference signal configuration in the notification; the reference signal configuration for transmitting data is a reference signal configuration used by the first device to transmit data, or a reference signal configuration used by the third transmission module to transmit data.

In practical application, the first device for transmitting data is configured at a first device; the second or third means for transmitting data is disposed on a second device. Specifically, the first device is a base station, and the second device is a terminal; or, the first device is a terminal, and the second device is a base station; or, the first device and the second device are both terminals.

The first device, the second device, or the third device for transmitting data provided in the embodiments of the present invention may be used to implement the technical solution of the above method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method of transmitting data, comprising:

wherein the reference signal configuration is a reference signal configuration of a beam, an antenna port, or a sector, the beam selecting a transmit beam and/or a receive beam for the first device for transmitting data, the antenna port selecting an antenna port for the first device for transmitting data, the sector selecting a sector for the first device for transmitting data;

before the determining the reference signal configuration for transmitting data, the method further includes:

2. The method of claim 1,

after notifying the second device of the determined reference signal configuration, the method further includes: transmitting data between the first device and the second device using the determined reference signal configuration.

3. The method of claim 1, wherein the first device informs the second device of the reference signal configuration via control information.

4. The method of claim 3, wherein the control information is carried by a physical control signal or a higher layer control signal.

5. The method of claim 4, wherein the physical control signal is a downlink physical control signal or an uplink physical control signal.

6. The method according to claim 1 or 3, wherein the first device informs the second device of the reference signal configuration in a display manner or an implicit manner.

7. The method of claim 6, wherein the first device implicitly informs the second device of the reference signal configuration, comprising:

8. The method of claim 4, wherein the higher layer control signal is a radio resource management signaling or a broadcast signal.

9. The method of claim 1,

the notifying the determined reference signal configuration to the second device specifically includes:

10. The method of claim 2,

11. The method of claim 1,

the first device is a base station, and the second device is a terminal; or, the first device is a terminal, and the second device is a base station; or, the first device and the second device are both terminals.

12. A method of transmitting data, comprising:

the second equipment obtains the measurement result and reports the measurement result to the first equipment;

wherein the reference signal configuration is a reference signal configuration of a beam, an antenna port, or a sector, the beam selecting a transmit beam and/or a receive beam for the first device to transmit data, the antenna port selecting an antenna port for the first device to transmit data, the sector selecting a sector for the first device to transmit data;

the second device obtaining the measurement result comprises:

the second equipment receives the training signal transmitted by the first equipment, measures and obtains the measurement result;

13. The method of claim 12,

after the second device receives the notification of the first device, the method further includes: configuring transmission data between the second device and the first device by using the reference signal in the notification;

14. A method of transmitting data, comprising:

further comprising:

obtaining a measurement result by measuring a training signal from the second device;

15. The method of claim 14,

16. A first apparatus for transmitting data, comprising:

wherein the reference signal configuration is a reference signal configuration of a beam, an antenna port or a sector, the beam is a transmission beam and/or a reception beam selected by the determination module for transmitting data, the antenna port is an antenna port selected by the determination module for transmitting data, and the sector is a sector selected by the determination module for transmitting data;

the device further comprises:

an obtaining module, configured to obtain a measurement result from the second device before determining the reference signal configuration for transmitting data, or obtain the measurement result by measuring a training signal from the second device;

17. The apparatus of claim 16, further comprising:

a first transmission module to transmit data to the second device using the determined reference signal configuration;

the reference signal configuration for transmitting data is a reference signal configuration used by the first transmission module to transmit data, or a reference signal configuration used by the second device to transmit data.

18. The apparatus according to claim 16, wherein the notifying module is specifically configured to notify the second device of the reference signal configuration through control information.

19. The apparatus according to claim 16 or 18, wherein the notifying module is specifically configured to notify the second device of the reference signal configuration in a display manner or an implicit manner.

20. The apparatus of claim 19, wherein the notifying module is specifically configured to set a reference signal pattern or a reference signal sequence on a control channel, and the reference signal pattern or the reference signal sequence is mapped to the reference signal configuration one to one.

21. The apparatus of claim 16,

the notifying module is specifically configured to notify the second device of the determined reference signal configuration when it is determined that the determined reference signal configuration is different from a reference signal configuration used for data transmission to the second device; and/or the presence of a gas in the gas,

specifically, the method is configured to notify the second device of the reference signal configuration when the beam corresponding to the determined reference signal configuration is not the optimal beam in the measurement result, or when the antenna port corresponding to the determined reference signal configuration is not the optimal antenna port in the measurement result, or when the sector corresponding to the determined reference signal configuration is not the optimal sector in the measurement result.

22. The apparatus of claim 16,

the first device for transmitting data is configured at a first device;

the first device is a base station and the second device is a terminal; or, the first device is a terminal, and the second device is a base station; or, the first device and the second device are both terminals.

23. A second apparatus for transmitting data, comprising:

the measurement module is used for obtaining a measurement result and reporting the measurement result to the first equipment;

the measurement module is specifically configured to receive a training signal transmitted by the first device, measure and obtain the measurement result;

24. The apparatus of claim 23, further comprising:

a second transmission module to transmit data to the first device using the reference signal configuration in the notification;

25. A third apparatus for transmitting data, comprising:

the third means is further for:

the measurement result includes a preferred beam set, a preferred antenna port set, or a preferred sector set, the preferred beam set including information of at least one beam, the preferred antenna port set including information of at least one antenna port, and the preferred sector set including information of at least one sector.

26. The apparatus of claim 25, further comprising:

a third transmission module configured to transmit data to the first device using the reference signal configuration in the notification;

the reference signal configuration for transmitting data is a reference signal configuration used by the first device to transmit data, or a reference signal configuration used by the third transmission module to transmit data.