WO2017193773A1

WO2017193773A1 - Data transmission method and apparatus

Info

Publication number: WO2017193773A1
Application number: PCT/CN2017/080937
Authority: WO
Inventors: 张峻峰; 郝鹏; 鲁照华; 刘星
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-05-09
Filing date: 2017-04-18
Publication date: 2017-11-16
Also published as: CN107360625B; CN107360625A

Abstract

Disclosed are a data transmission method and apparatus. The method may comprise: a first device determines a reference signal configuration for data transmission; the first device notifies a second device of the determined reference signal configuration. The reference signal configuration is at least one of a reference signal configuration for a wave beam, a reference signal configuration for an antenna port, and a reference signal configuration for a sector; the wave beam is a wave beam selected by the first device and used for data transmission; the antenna port is an antenna port selected by the first device and used for data transmission; the sector is a sector selected by the first device and used for data transmission.

Description

Method and device for transmitting data

Technical field

The present application relates to, but is not limited to, the field of wireless communications, and more particularly to a method and apparatus for transmitting data.

Background technique

The new generation of mobile communication systems will be systematically networked on carrier frequencies higher than those used in 2G, 3G, and 4G systems. Currently, the industry's widely recognized and internationally recognized frequency bands are mainly 3 GHz to 6 GHz and 6 GHz to 100 GHz. A frequency band basically belongs to the centimeter band and the millimeter band, and its propagation characteristics are significantly different from the lower frequency band. Since the propagation loss of the high frequency band is significantly larger than the low frequency band, the coverage of the high frequency band is generally much smaller than the coverage of the low frequency band. In order to enhance the coverage of high frequency bands, beamforming technology is widely used to narrow the energy of wireless signals and concentrate on devices that need to communicate with each other.

Since the beam is narrow, in order to accurately focus the beam on the device that needs to communicate, beam training is required to select the optimal or sub-optimal beam. Typical scenarios for beam training are as follows. The first one is to search for available beams without any beam information during the initial access process. The second is to perform more accurate search during the post-access communication process. Training, this is because in the first beam training, in order to reduce the access delay, the beam search does not necessarily select the optimal beam, but only the available beam; the third scenario is the beam maintenance and tracking function, due to the terminal The movement of the mobile or the surrounding environment, the optimal beam also needs to be adjusted.

The beam training process for determining the preferred downlink transmit beam is as shown in FIG. 1. The base station (eNodeB) transmits the training signal in the direction of each downlink transmit beam, and the terminal measures and selects the downlink transmit beam index with the best reception quality and feeds back to the base station to complete the downlink transmission. Beam training process.

In the normal case, the terminal measures the beam and determines the optimal downlink transmit beam by comparison, and feeds back to the index or identifier of the optimal downlink transmit beam of the base station. The base station selects the index or the marked marker beam for corresponding transmission, as shown in FIG. A beam. Correspondingly, the optimal receiving beam used by the terminal is determined by the terminal itself, and the maximum probability that the optimal receiving beam is in a constant time in a constant scene is strongly correlated with the downlink transmitting beam, such as the downlink optimal beam. A, the corresponding downlink optimal The receiving beam is a, or the downlink sub-optimal beam B, and the corresponding downlink optimal receiving beam is b. If the base station is not the selected A beam to transmit data, then the terminal still assumes that the a beam is received, which is unreasonable. In a more reliable case, the base station only uses the optimal downlink transmit beam reported by the terminal as a reference. The actual implementation may be due to factors such as load balancing between beams, interference suppression, and beam prediction under mobile conditions. At this time, the terminal needs to know the corresponding change and select its corresponding optimal receiving beam. If the base station selects the B beam, the terminal receives the b beam. The choice of beam will directly affect the quality of data transmission between the base station and the terminal.

The beam is an image description of the convergence of wireless energy. It is further extended that the description of the energy distribution of the fixed pointing antenna of a sector as a traditional base station system is actually a beam in a broad sense. Beams are more commonly described by physical or logical antenna ports.

Summary of invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

Embodiments of the present invention provide a method and apparatus for transmitting data to more reasonably utilize wireless energy (such as a beam, a sector, or a wireless port, etc.) to transmit data.

The embodiment of the invention provides a method for transmitting data, including:

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

The first device notifies the determined reference signal configuration to the second device;

The reference signal is configured as at least one of a reference signal configuration of a beam, a reference signal configuration of an antenna port, and a reference signal configuration of a sector, where the beam selects a transmit beam for transmitting data for the first device And at least one of a receive beam for the first device to select an antenna port for transmitting data, the sector selecting a sector for transmitting data for the first device.

In an embodiment, after the notifying the determined reference signal configuration to the second device, the method further includes: configuring the transmission data between the first device and the second device by using the determined reference signal.

In an embodiment, before the determining the configuration of the reference signal for transmitting data, the method further includes:

The first device obtains the 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, preferably a set of antenna ports or a preferred set of sectors, the preferred set of beams comprising information of at least one beam, the set of preferred antenna ports comprising information of at least one antenna port, the preferred sector A collection contains information for at least one sector.

In an embodiment, the notifying, by the first device, the determined reference signal configuration to the second device includes: the first device notifying the reference device configuration to the second device by using the control information.

In an embodiment, the control information is carried by a physical control signal or a higher layer control signal.

In an embodiment, the physical control signal is a downlink physical control signal or an uplink physical control signal.

In an embodiment, the notifying, by the first device, the determined reference signal configuration to the second device includes: the first device notifying the reference device configuration to the second device in a display mode or an implicit manner.

In an embodiment, the first device notifies the reference device configuration to the second device in an implicit manner, including:

The first device sets a reference signal pattern or a reference signal sequence on the control channel, and the reference signal pattern or the reference signal sequence is mapped to the reference signal configuration one by one.

In an embodiment, the high layer control signal is a radio resource management signaling or a broadcast signal.

In an embodiment, the notifying the determined reference signal configuration to the second device includes:

And when the first device determines that the determined reference signal configuration is different from the reference signal configuration used for transmitting data to the second device, the determined reference signal configuration is notified to the second device.

When the determined reference signal configuration corresponding beam is not the optimal one of the measurement results, or when the determined reference signal configuration corresponding antenna port is not the optimal antenna port in the measurement result, or The sector corresponding to the determined reference signal configuration is not the measurement result Notifying the reference signal configuration to the second device when the optimal sector is in progress.

In an embodiment, 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 embodiment of the invention further provides a method for transmitting data, including:

The second device obtains the measurement result and reports it to the first device;

Receiving, by the second device, a notification of the first device, where the notification includes a reference signal configuration for transmitting data;

In an embodiment, the reference signal is configured as at least one of a reference signal configuration of a beam, a reference signal configuration of an antenna port, and a reference signal configuration of a sector, the beam being selected for transmission by the first device At least one of a transmit beam and a receive beam of data, the antenna port selecting an antenna port for transmitting data for the first device, the sector selecting a sector for transmitting data for the first device .

In an embodiment, after the receiving, by the second device, the notification of the first device, the method further includes: configuring, by using, the reference signal in the notification, the transmission data between the second device and the first device; 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 an embodiment, the obtaining, by the second device, the measurement result includes: the second device receiving the training signal sent by the first device, measuring and obtaining the measurement result; the measurement result includes a preferred beam set, and a preference An antenna port set or a preferred set of sectors, the preferred set of beams comprising information of at least one beam, the set of preferred antenna ports comprising information of at least one antenna port, the set of preferred sectors comprising information of at least one sector.

The second device transmits the training signal to the first device in multiple transmit beam directions or multiple antenna ports or multiple sectors;

In an embodiment, the reference signal is configured as a reference signal configuration of the beam, and an antenna port At least one of a reference signal configuration and a reference signal configuration of a sector, the beam selecting at least one of a transmit beam and a receive beam for transmitting data for the first device, the antenna port being The first device selects an antenna port for transmitting data, the sector selecting a sector for transmitting data for the first device.

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

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 an apparatus for transmitting data, including:

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

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

In an embodiment, the reference signal is configured as at least one of a reference signal configuration of a beam, a reference signal configuration of an antenna port, and a reference signal configuration of a sector, the beam being selected by the determining module for transmitting data At least one of a transmit beam and a receive beam, the antenna port selecting an antenna port for transmitting data for the determining module, the sector selecting a sector for transmitting data for the determining module.

In an embodiment, the method further includes: a first transmission module configured to transmit data to the second device using the determined reference signal configuration; the reference signal configuration for transmitting data is that the first transmission module sends data The reference signal configuration used, or the reference signal configuration used by the second device to transmit data.

In an embodiment, the method further includes: an obtaining module, configured to acquire a measurement result from the second device, or obtain the measurement result by measuring a training signal from the second device; the measurement result includes a preferred beam set Preferred antenna set or preferred set of sectors, said preferred set of beams comprising information of at least one beam, said set of preferred antenna ports comprising information of at least one antenna port, said set of preferred sectors comprising information of at least one sector .

In an embodiment, the notification module is configured to notify the second device by using the control information.

In an embodiment, the notification module is configured to notify the second device of the reference signal configuration in a display mode or an implicit manner.

In an embodiment, the notification module is configured to set a reference signal pattern or a reference signal sequence on the control channel, and the reference signal pattern or the reference signal sequence is mapped to the reference signal configuration one by one.

In an embodiment, the notification module is configured to notify the determined reference signal configuration when determining that the determined reference signal configuration and the reference signal configuration used to transmit data to the second device are different before Said second device.

In an embodiment, the notification module is configured to: when the determined reference signal configuration corresponding beam is not the optimal beam in the measurement result, or the antenna port corresponding to the determined reference signal configuration is not When the optimal antenna port in the measurement result is described, or when the sector corresponding to the determined reference signal configuration is not the optimal sector in the measurement result, the reference signal configuration is notified to the second device.

In an embodiment, the first device for transmitting data is configured in 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 both the first device and the second device are terminals.

a measurement module, configured to obtain a measurement result and report it to the first device;

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

In an embodiment, the method further includes: a second transmission module, configured to transmit data to the first device by using a reference signal configuration in the notification;

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

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

In an embodiment, 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 set of sectors includes information for at least one sector.

a transmitting module, configured to transmit a training signal to the first device in multiple transmit beam directions or multiple antenna ports or on multiple 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;

In an embodiment, the method further includes: a third transmission module configured to transmit data to the first device by using a reference signal configuration in the notification; the reference signal configuration for transmitting data is sent by the first device The reference signal configuration used by the data or the reference signal configuration used by the third transmission module to transmit data.

Embodiments of the present invention also provide a computer readable storage medium storing computer executable instructions that implement the above method of transmitting data when executed by a processor.

The method and device for transmitting data provided by the embodiment of the present invention first determine a reference signal configuration for transmitting data, and then notify the corresponding device of the determined reference signal configuration, so that the devices transmitting the data can utilize the wireless more reasonably. Energy transfer data, increasing the rate at which data is transmitted, and avoiding transmission errors.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

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

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

3 is a schematic flowchart of another method for transmitting data according to an embodiment of the present invention;

4 is a schematic flowchart diagram of another method for transmitting data according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of interaction of downlink transmit beam selection according to an embodiment of the present invention; FIG.

6 is a schematic diagram of interaction of uplink transmit beam selection between a terminal and a base station according to Embodiment 2 of the present invention;

FIG. 7 is a schematic diagram of interaction of uplink transmit beam selection between a terminal and a base station according to Embodiment 3 of the present invention; FIG.

FIG. 8 is a schematic diagram of interaction of uplink transmit beam selection between terminals according to Embodiment 4 of the present invention; FIG.

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

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

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

Detailed

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

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 notifies the second device of the determined reference signal configuration.

The reference signal is configured as at least one of a reference signal configuration of a beam, a reference signal configuration of an antenna port, and a reference signal configuration of a sector, where the beam selects a transmit beam for transmitting data for the first device And/or receiving a beam, the antenna port selecting an antenna port for transmitting data for the first device, the sector selecting a sector for transmitting data for the first device.

After the step 202, the method further includes: Step 203, the transmission data is configured between the first device and the second device by using the determined reference signal.

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

The first device may notify the second device by using the control information by using the control information. The control information may be carried by a physical control signal or a high layer control signal. The physical control signal may be a downlink physical control signal or an uplink physical control signal. The high layer control signal may be a radio resource management signaling or a broadcast signal.

The first device notifies the reference device configuration to the second device in a display mode or an implicit manner. The first device notifies the reference device configuration to the second device in an implicit manner, including: the first device sets a reference signal pattern or a reference signal sequence on the control channel, and the reference signal pattern or reference signal The sequence is mapped one-to-one with the reference signal configuration. In this way, the second device can learn the reference signal configuration for transmitting data according to the reference signal pattern of the control channel or the reference signal sequence.

The reference signal configuration used by the control information is different from the reference signal configuration used for data transmission. The reference signal configuration used by the data transmission may be data transmitted by the first device or a reference signal configuration used by data transmitted by the second device. As mentioned previously, the reference signal configuration may be a beam, antenna port, sector number or index or resource configuration information. The radio resources such as the beam carrying the control information and the radio resources carrying the data are separated and different. Bearer data transmission refers to two-way data transmission between two devices, which may have the first device to the second device. Shot, there may also be a second device to the first device.

The step 202 may be: when the first device determines that the determined reference signal configuration is different from the reference signal configuration used to transmit data to the second device, the determined reference signal configuration is notified to the second device. Here, the reference signal configuration needs to be periodically or non-periodically adjusted as the terminal moves or the propagation environment changes. If the system determines the reference signal configuration according to the period, and finds that the reference signal configuration is the same as the previous period, then no Notification, if not, notify. That is to say, the above-mentioned "reference signal configuration used for transmitting data to the second device" may be "a reference signal configuration used for transmitting data to the second device in the previous cycle".

The method for notifying the determined reference signal configuration to the second device may be: when the determined reference signal configuration corresponding beam is not the optimal beam in the measurement result, or configured in the determined reference signal Notifying the reference signal configuration when the corresponding antenna port 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 The second device. The second device defaults to the current beam for transmitting data, or the antenna port for transmitting data is the optimal antenna port in the measurement result, or the current transmission, because the first device does not notify the first device. The sector for data is the best sector in the measurement result. Therefore, the first device can notify the second device only when the selected beam or antenna port or sector is not optimal, thus saving signalling overhead.

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

Step 301: The second device obtains the measurement result and reports it to the first device.

Step 302: The second device receives the notification of the first device, where the notification includes a reference signal configuration for transmitting data.

After the receiving, by the second device, the notification of the first device, the method further includes: Step 303: The second device and the first device configure transmission data by using a reference signal in the notification; the reference signal configuration for transmitting data is a reference signal configuration used by the first device to send data. Or a reference signal configuration used by the second device to transmit data.

The second device obtains the measurement result in the step 301, the second device receives the training signal sent by the first device, and measures and obtains the measurement result; the measurement result includes a preferred beam set, a preferred antenna. A set of ports or a preferred set of sectors, said preferred set of beams comprising information of at least one beam, said set of preferred antenna ports comprising information of at least one antenna port, said set of preferred sectors comprising information of at least one sector.

As shown in FIG. 4, the embodiment of the present invention further provides another method for transmitting data, including:

Step 401: The second device transmits a training signal to the first device in multiple transmit beam directions or multiple antenna ports or multiple sectors.

Step 402: The second device receives the notification of the first device, where the notification includes a reference signal configuration for transmitting data.

After the second device receives the notification of the first device, the method further includes: Step 403, the second device and the first device use the reference signal in the notification to configure transmission data; 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.

If the second device does not receive the reference signal configuration of the transmit beam, then the second device defaults to the beam or antenna port or sector where the best quality of the receive beam or antenna port or sector is used by the first device to transmit data. The second device defaults to the beam or antenna port or sector with the best reception quality. Or, the second device continues to use the reference signal of the last notification of the first device by default. Set.

The implementation process of the method for transmitting data in the embodiment of the present invention in different scenarios is described in detail below by using an embodiment.

Embodiment 1

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

Step 501: The base station (eNodeB) transmits a training signal in a direction of each downlink transmit beam, where the training signal may be a synchronization signal, a discovery signal, a common pilot signal, or the like;

Step 502: The terminal (UE) determines a preferred beam set and feeds back to the base station;

The terminal receives the training signal, performs measurement on the training signal, selects one or several downlink transmit beams with the best reception quality and better composition according to the measurement result, and combines the preferred beam set to the base station. The receiving quality is preferably that the receiving quality is optimal, and the receiving quality is better. The receiving quality is higher than the threshold, and the threshold is a pre-configured threshold.

Here, the preferred beam set that the terminal feeds back to the base station may include tag information of the transmit beam, such as an identifier or index of the transmit beam.

Step 503: The terminal feeds back the preferred beam set to the base station, and the base station selects the optimized downlink transmit beam as the current transmission data for transmission according to the load balancing between the beams, the interference suppression, and the beam prediction algorithm in the mobile situation. Beam,

Here, the optimized downlink transmit beam selected by the base station may be the best received quality in the above set (downlink transmit beam A in FIG. 5), or may not be one of several transmit beams with better reception quality, as shown in FIG. 5. The downlink transmit beam B in the middle. In special cases, the base station may also select a transmit beam that is not the preferred set of beams as the downlink transmit beam for the current transmitted data.

Step 504: The base station notifies the terminal of the reference signal configuration of the downlink transmit beam, and the terminal receives the foregoing notification, and obtains the downlink transmit beam B used by the base station to transmit data, and obtains the downlink transmit beam and the downlink receive beam according to the beam training. Corresponding relationship, selecting a downlink receiving beam b corresponding to the downlink transmitting beam B as a receiving beam for receiving the transmission data.

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

Step 505: The base station transmits data to the terminal by using the downlink transmit beam B, and the terminal receives the transmitted data by using the downlink receive beam b.

Since the demodulation of the data in the beam depends on the specific reference signal, when the base station notifies the terminal to transmit the beam in the above process, it is equivalent to the notification reference signal configuration. The reference signal configuration includes configuration information of a specific reference signal and resource allocation information of the beam-specific reference signal, 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 on the time, frequency, code, and power domain used by the reference signal.

The reference signal configuration includes a beam-related dedicated reference signal. If both the base station and the terminal have beam capabilities, the beam implementation process needs to be used in pairs, that is, the transmit beam of the base station is paired with the receive beam of the terminal, because in the device The mapping relationship between the transmit beam and the receive beam can be known through the implementation process, so that it is not necessary to notify all the paired information, and only one of the paired information is notified. The reference signal configuration notified by the base station may only contain information related to the transmit beam, or only information related to the receive beam, or information related to the transmit beam and information related to the receive beam. That is, the reference signal configuration includes reference signal configuration information of the transmit beam and/or reference signal configuration information of the receive beam corresponding to the transmit beam. The beam and the antenna port and the sector have compatible or equivalent expressions, and the reference signal configuration notified by the base station may be a transmitting antenna port of a single base station, a sector-related, or a receiving antenna port of a separate terminal, a sector-related or two All are informed.

Wherein, the reference signal configuration can be used for terminal measurement and feedback channel quality, or for terminal demodulation.

The base station can notify the terminal of the selected downlink transmit beam by using the control information. For example, the DL control grant can be used to quickly track the physical downlink shared channel (PDSCH). The change of the beam is notified by a high-level signaling method suitable for a scene with a slow beam change.

In general, the terminal may default to the base station selecting to use the optimal transmit beam in the preferred set of beams, which means that if the base station selects the best transmit beam, the base station may not send a relevant notification to the terminal, but only at the base station. The notification is only performed in the case of a non-optimal transmit beam, and thus, the purpose of saving signaling can be achieved.

In general, the terminal may also default to the base station to use the last notification, for the transmission of data. The transmit beam of the configuration. This means that if the base station selects the last used transmit beam, the base station can not notify the terminal of the relevant notification, and only informs the terminal when the base station selects the transmit beam that was not used last time, so as to save signaling.

In this embodiment, the reference signal configured by the base station is configured to be carried on the control channel or the control signaling resource, but the reference signal used by the control channel or the control signaling itself for measurement does not necessarily need to be used for data transmission or for demodulation or The measured reference signal configuration is the same. For example, the beam where the control channel is located may be a common beam whose beam pointing range is wider than the data beam range pointing to a specific terminal. In this case, if the terminal performs beam training measurement, it uses a publicly controlled beam. Then, the most suitable beam used in actually transmitting data has a certain probability that it is not the optimal beam determined when the common control beam is trained. In this case, the base station is required to notify the terminal of its selected transmit beam.

In practical applications, the manner of notification can be performed by using a control channel display or an implicit manner. The display mode is that the plaintext embeds relevant signaling in the control channel, and notifies the optimized reference signal configuration used for data transmission. The implicit method is to save signaling overhead by implicitly signaling. The typical implementation method is as follows: The base station can set different reference signal patterns or reference signal sequences on the control channel, and reference signal patterns or references. The signal sequence is mapped with the reference signal configuration (for example, the index or identifier of the reference signal configuration may be mapped one-to-one with the reference signal pattern or the reference signal sequence), and the terminal attempts to decode the reference signal of different patterns or sequences on the control channel. Control channel demodulation is performed to determine a reference signal configuration index or beam index related to data transmission based on the reference signal pattern or the reference signal sequence terminal. For example, the reference signal on the control channel beam 1 can be set to the pattern or sequence corresponding to the reference signal configuration index B according to the mapping relationship, and the terminal can know the transmission data correspondingly by blindly detecting the pattern or sequence of the reference signal of the beam 1. The reference signal is configured as B. Or when the terminal has multiple radio channel capabilities, it can simultaneously try to receive control channels on 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 one is implicitly used. Beam.

Embodiment 2

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

Step 601: The terminal transmits a training signal in a direction of each uplink transmit beam, where the training signal can be Therefore, a random access signal, a Sounding Reference Signal (SRS), an uplink demodulation reference signal, and the like;

Step 602: The base station measures the training signal and obtains a preferred beam set.

Step 603: The base station selects an optimized uplink transmit beam to transmit data in the preferred beam set according to load balancing between the beams, interference suppression, and a beam prediction algorithm in a mobile situation, and notifies the terminal that the terminal receives the notification.

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

Step 604: The terminal transmits data to the base station by using the uplink transmit beam B selected by the base station.

In Figure 6, the uplink transmit beam A is the optimal uplink transmit beam, which corresponds to the uplink receive beam a; the uplink transmit beam B is the base station finally selected to transmit the data uplink transmit beam, which corresponds to the uplink receive beam b. 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 transmit beam is determined and notified here, which is the same as the first embodiment in that the base station is still the main control end, and is responsible for determining and notifying the optimized transmit beam.

The reference signal configuration includes a beam-related dedicated reference signal. If both the terminal and the base station have beam capabilities, the beam implementation process needs to be used in pairs, that is, the transmit beam of the terminal is paired with the receive beam of the base station, that is, The reference signal configuration includes a reference signal configuration of the transmit beam and a reference signal configuration of the receive beam. If the base station knows its own optimized receive beam before the notification, it only informs the terminal of the transmit beam related reference signal configuration. The notified reference signal configuration, if only the reference signal configuration of the transmit beam, can be used by the terminal to select an optimized beam transmission. The unannounced receive reference signal configuration can be used by the base station to measure the uplink channel and feed back the channel quality. Quantity, or used for base station demodulation.

In this embodiment, the base station can also notify the terminal by using the DL control grant real-time notification manner or the high-layer signaling manner.

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

Embodiment 3

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

Step 701: The terminal transmits a training signal in a direction of each uplink transmit beam, where the training signal may be a random access signal, an SRS, an uplink demodulation reference signal, or the like;

Step 702: The base station measures and obtains an optimal uplink transmit beam set.

Step 703: The base station feeds back the optimal uplink transmit beam set to the terminal.

Step 704: The terminal selects an optimized uplink transmit beam for transmitting data in the optimal uplink transmit beam set, and notifies the base station of the reference signal configuration of the uplink transmit beam by using uplink signaling.

In special cases, the terminal may also select a non-transmitted beam identification or a beam in the index set as an optimized uplink transmit beam.

Step 705: The terminal transmits data to the base station by using the uplink transmit beam.

In Figure 7, the uplink transmit beam A is the optimal uplink transmit beam, which corresponds to the uplink receive beam a; the uplink transmit beam B is the final selection for transmitting the data uplink transmit beam, which corresponds to the uplink receive beam b.

In this embodiment, the difference from the first embodiment is that the optimized uplink transmit beam is determined here and determined and selected by the terminal, and the base station is only responsible for feeding back the selectable set. Compared with the second embodiment, the same is to determine the optimized uplink transmit beam, but the difference is that the embodiment determines the optimized transmit beam used by the terminal.

Since the demodulation of the data in the beam depends on the specific reference signal, when the base station notifies the terminal to transmit the beam in the above process, it is equivalent to the notification reference signal configuration. The reference signal configuration contains specific The configuration information of the reference signal and the resource allocation information of the beam-specific reference signal, etc., 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 on the time, frequency, code, and power domain used by the reference signal.

The reference signal configuration includes a beam-related dedicated reference signal. If both the base station and the terminal have beam capabilities, the beam implementation process needs to be used in pairs, that is, the transmit beam of the base station is paired with the receive beam of the terminal, because in the device The mapping relationship between the transmit beam and the receive beam can be known through the implementation process, so that it is not necessary to notify all the paired information, and only one of the paired information is notified. The notified reference signal configuration may include only transmit beam related information, or only receive beam related information, or transmit beam related information and receive beam related information. That is, the reference signal configuration includes reference signal configuration information of the transmit beam and/or reference signal configuration information of the receive beam corresponding to the transmit beam.

The notified reference signal configuration may be used by the base station to measure and feed back channel quality or for base station demodulation.

The terminal also notifies the base station of the selected optimized transmit beam by means of uplink (UL) control information by means of real-time notification or high-level signaling.

In general, the base station may choose to use the optimal uplink transmit beam in the preferred beam set by default, which means that if the terminal selects the optimal uplink transmit beam, the terminal may not send a relevant notification to the base station, only in the The notification is only performed when the terminal selects a non-optimal uplink transmit beam, so that the purpose of saving signaling can be achieved.

In general, the base station may also default to the base station to select the transmit beam that is actually configured for transmission of the data that was last notified. This means that if the terminal selects the last used uplink transmit beam, the terminal may not send a relevant notification to the base station, and only inform the base station when the terminal selects the uplink transmit beam that was not used last time, so as to save signaling. purpose.

Embodiment 4

For the scenario of Device-to-Device (D2D), the terminal can also notify the final selected transmit beam. In this embodiment, a process of selecting a beam between terminals and notifying will be described in detail. As shown in FIG. 8, the method flow of this embodiment may include:

Step 801, UE_1 transmits a training signal in a direction of each transmit beam, and the training signal may be a sounding signal, a random access signal, a SRS (Sounding Reference Signal), a demodulation reference signal, or the like;

Step 802: The UE-2 obtains an optimal transmit beam set after measurement.

Step 803, UE_2 notifies UE_1 of the optimal transmit beam set;

Step 804, UE_1 selects an optimized uplink transmit beam for transmitting data in the optimal transmit beam set, and UE_1 notifies UE_2 of the corresponding reference signal configuration by signaling;

In special cases, UE_1 may also select a beam in the non-optimal transmit beam set as the uplink transmit beam used to transmit data.

The reference signal configuration of the uplink transmit beam corresponding to the uplink transmit beam may be the configuration of the reference signal of the uplink transmit beam, and may also be the reference signal configuration of the uplink transmit beam and the corresponding Reference signal configuration of the uplink receive beam.

In step 805, UE_1 uses the uplink transmit beam to transmit data to UE_2.

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 of the first embodiment or the third embodiment, except that the execution subject is different. In other words, the base station is replaced with a base station in the foregoing embodiment, and the implementation process may refer to the description of the foregoing embodiment. ,No longer.

In Figure 8, the uplink transmit beam A is the optimal uplink transmit beam, which corresponds to the uplink receive beam a; the uplink transmit beam B is the final selection for transmitting the data uplink transmit beam, which corresponds to the uplink receive beam b.

Embodiments 1 to 4 described above are equally applicable to selecting an antenna port or a sector to transmit data, and the flow is the same, except that the content included in the measurement result is different, and the content in the reference signal configuration is different. When the antenna port is selected to transmit data, the measurement result includes an optimal antenna port set, and the set includes at least information of the optimal antenna port (such as the number or index of the antenna port), and may also include one or a better transmission quality. The information of several antenna ports, the reference signal configuration contains the reference signal configuration of the antenna port. When the sector transmission data is selected, the measurement result includes an optimal sector set, and the set includes at least information of the optimal sector (such as the sector number or index), and may also include one or more of the transmission quality. Several sectors of information, included in the reference signal configuration Is the 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 fact, a sector can be considered a fixed beam, and its reference signal configuration can be considered as a reference signal configuration for a fixed beam. The conventional beam may be dynamically variable. Therefore, the reference signal configuration for the beam includes not only fixed beam related information but also related information describing the dynamic change of the beam. In addition to the beam-related content (formally different), the reference signal configuration of the antenna port may further add phase information about the antenna port.

As shown in FIG. 9, the 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;

The notification module 92 is configured to notify the second device of the determined reference signal configuration;

The reference signal is configured as at least one of a reference signal configuration of a beam, a reference signal configuration of an antenna port, and a reference signal configuration of a sector, where the beam selects a transmit beam for transmitting data and the determining module And/or a receive beam, the antenna port selecting an antenna port for transmitting data for the determining module, the sector selecting a sector for transmitting data for the determining module.

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

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

The notification module 92 may be configured to notify the second device by using the control information. The control information may be carried by a physical control signal or a high layer control signal. The physical control signal may be a downlink physical control signal or an uplink physical control signal. The high layer control signal may be a radio resource management signaling or a broadcast signal.

The notification module 92 may be configured to notify the second device by using the reference signal configuration in a display mode or an implicit manner. For example, the notification module 92 can be configured to set a reference signal pattern or a reference signal sequence on the control channel, and map the reference signal pattern or the reference signal sequence to the reference signal configuration. In this way, the second device can learn the reference signal configuration for transmitting data according to the reference signal pattern of the control channel or the reference signal sequence.

The notification module 92 is further configured to notify the second reference configuration of the determined reference signal when determining that the determined reference signal configuration is different from a reference signal configuration used by the second device to transmit data. And/or, when the determined reference signal configuration corresponding beam is not the optimal beam in the measurement result, or the antenna port corresponding to the determined reference signal configuration is not the optimal antenna in the measurement result At the time of the port, or when the sector corresponding to the determined reference signal configuration is not the optimal sector in the measurement result, the reference signal configuration is notified to the second device.

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

The measuring module 101 is configured to obtain the measurement result and report it to the first device;

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

Wherein, as shown in FIG. 10, the second device may further include: a second transmission module 103 configured to use the reference signal configuration in the notification to transmit data to the first device; the reference signal configuration for transmitting data It 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 configured to receive a training signal sent by the first device, Measuring and obtaining 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 comprising information of at least one beam, the preferred antenna port set comprising at least one Information of the antenna port, the preferred set of sectors comprising information for at least one sector.

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

The transmitting module 111 is configured to transmit a training signal to the first device on multiple transmit beam directions or multiple antenna ports or multiple sectors;

The second receiving module 112 is 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 transmission module 113 configured to use the reference signal configuration in the notification to transmit data to the first device; the reference signal configuration for transmitting data is The reference signal configuration used by the first device to transmit data, or the reference signal configuration used by the third transmission module to transmit data.

In a practical application, the first device for transmitting data is configured in the first device; the second device or the third device for transmitting data is deployed on the second 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.

The foregoing first device, the second device, or the third device for transmitting data provided by the embodiment of the present invention may be used to perform the technical solution of the foregoing method embodiment, and the implementation principle and the technical effect thereof are similar, and details are not described herein again.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. All or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function. Embodiments of the invention are not limited to any specific form of combination of hardware and software.

The embodiments disclosed in the present application are as described above, but the description is only for the purpose of understanding the present application, and is not intended to limit the present application. Any modifications and changes in the form and details of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the disclosure. The scope defined by the appended claims shall prevail.

Industrial applicability

Claims

A method of transmitting data, including:

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

The first device notifies the determined reference signal configuration to the second device;

The reference signal is configured as at least one of a reference signal configuration of a beam, a reference signal configuration of an antenna port, and a reference signal configuration of a sector, where the beam selects a transmit beam for transmitting data for the first device And at least one of a receive beam for the first device to select an antenna port for transmitting data, the sector selecting a sector for transmitting data for the first device.
The method of claim 1 wherein

After the determining the determined reference signal configuration to the second device, the method further includes: configuring the transmission data between the first device and the second device by using the determined reference signal.
The method of claim 1, wherein before the determining the configuration of the reference signal for transmitting data, the method further comprises:

The first device obtains the 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, preferably a set of antenna ports or a preferred set of sectors, the preferred set of beams comprising information of at least one beam, the set of preferred antenna ports comprising information of at least one antenna port, the preferred sector A collection contains information for at least one sector.
The method of claim 1, wherein the notifying the first device of the determined reference signal configuration to the second device comprises:

The first device notifies the second device of the reference signal configuration by using control information.
The method of claim 4 wherein said control information is carried by a physical control signal or a higher layer control signal.
The method of claim 5, wherein the physical control signal is a downlink physical control signal or an uplink physical control signal.
The method of claim 1 or 4, wherein said first device will determine The reference signal configuration notification to the second device includes:

The first device notifies the second device to the reference signal configuration in a display mode or an implicit manner.
The method according to claim 7, wherein the first device notifies the reference device configuration to the second device in an implicit manner, including:

The first device sets a reference signal pattern or a reference signal sequence on the control channel, and the reference signal pattern or the reference signal sequence is mapped to the reference signal configuration one by one.
The method of claim 5 wherein the higher layer control signal is a radio resource management signaling or a broadcast signal.
The method of claim 1 wherein

And the notifying the determined reference signal configuration to the second device, including:

And when the first device determines that the determined reference signal configuration is different from the reference signal configuration used for transmitting data to the second device, the determined reference signal configuration is notified to the second device.
The method of claim 2, wherein

And the notifying the determined reference signal configuration to the second device, including:

When the determined reference signal configuration corresponding beam is not the optimal one of the measurement results, or when the determined reference signal configuration corresponding antenna port 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, the reference signal configuration is notified to the second device.
The method of claim 1 wherein

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.
A method of transmitting data, including:

The second device obtains the measurement result and reports it to the first device;

Receiving, by the second device, a notification of the first device, where the notification includes a reference signal configuration for transmitting data;

The reference signal is configured as at least one of a reference signal configuration of a beam, a reference signal configuration of an antenna port, and a reference signal configuration of a sector, where the beam selects a transmit beam for transmitting data for the first device And at least one of a receive beam for the first device to select an antenna port for transmitting data, the sector selecting a sector for transmitting data for the first device.
The method of claim 13 wherein

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

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.
The method according to claim 13, wherein the obtaining the measurement result by the second device comprises:

Receiving, by the second device, a training signal sent by the first device, and obtaining the measurement result;

The measurement result comprises a preferred beam set, preferably a set of antenna ports or a preferred set of sectors, the preferred set of beams comprising information of at least one beam, the set of preferred antenna ports comprising information of at least one antenna port, the preferred sector A collection contains information for at least one sector.
A method of transmitting data, including:

The second device transmits the training signal to the first device in multiple transmit beam directions or multiple antenna ports or multiple sectors;

Receiving, by the second device, a notification of the first device, where the notification includes a reference signal configuration for transmitting data;

The reference signal is configured as at least one of a reference signal configuration of a beam, a reference signal configuration of an antenna port, and a reference signal configuration of a sector, where the beam selects a transmit beam for transmitting data for the first device And at least one of a receive beam for the first device to select an antenna port for transmitting data, the sector selecting a sector for transmitting data for the first device.
The method of claim 16 wherein

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

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 apparatus for transmitting data, comprising:

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

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

The reference signal is configured as at least one of a reference signal configuration of a beam, a reference signal configuration of an antenna port, and a reference signal configuration of a sector, where the beam selects a transmit beam for transmitting data and the determining module At least one of receiving beams, the antenna port selecting an antenna port for transmitting data for the determining module, the sector selecting a sector for transmitting data for the determining module.
The apparatus of claim 18, further comprising:

a first transmission module configured 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.
The apparatus of claim 19, further comprising:

Obtaining a 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, preferably a set of antenna ports or a preferred set of sectors, the preferred set of beams comprising information of at least one beam, the set of preferred antenna ports comprising information of at least one antenna port, the preferred sector A collection contains information for at least one sector.
The apparatus of claim 18, wherein the notification module is configured to notify the second device of the reference signal configuration by control information.
The apparatus according to claim 18 or 21, wherein the notification module is configured to notify the second device of the reference signal configuration in a display mode or an implicit manner.
The apparatus of claim 22, wherein the notification module is configured to set a reference signal pattern or a reference signal sequence on the control channel, the reference signal pattern or the reference signal sequence being one-to-one mapped with the reference signal configuration.
The device according to claim 18, wherein

The notification module is set to:

The determined reference signal configuration is notified to the second device when it is determined that the determined reference signal configuration is different from the reference signal configuration previously used to transmit data to the second device.
The device according to claim 18, wherein

The notification module is set to:

When the determined reference signal configuration corresponding beam is not the optimal one of the measurement results, or when the determined reference signal configuration corresponding antenna port 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, the reference signal configuration is notified to the second device.
An apparatus for transmitting data, comprising:

a measurement module, configured to obtain a measurement result and report it to the first device;

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

The reference signal is configured as at least one of a reference signal configuration of a beam, a reference signal configuration of an antenna port, and a reference signal configuration of a sector, where the beam selects a transmit beam for transmitting data for the first device And at least one of a receive beam for the first device to select an antenna port for transmitting data, the sector selecting a sector for transmitting data for the first device.
The apparatus of claim 26, further comprising:

a second transmission module configured to transmit data to the first device using a 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 device according to claim 26, wherein

The measuring module is configured to receive a training signal sent by the first device, measure and obtain 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 includes information of at least one beam, the preferred antenna port set includes information of at least one antenna port, the preference The set of sectors contains information for at least one sector.
An apparatus for transmitting data, comprising:

a transmitting module, configured to transmit a training signal to the first device in multiple transmit beam directions or multiple antenna ports or on multiple 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;

The reference signal is configured as at least one of a reference signal configuration of a beam, a reference signal configuration of an antenna port, and a reference signal configuration of a sector, where the beam selects a transmit beam for transmitting data for the first device And at least one of a receive beam for the first device to select an antenna port for transmitting data, the sector selecting a sector for transmitting data for the first device.
The apparatus of claim 29, further comprising:

a third transmission module configured to transmit data to the first device using a 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.