CN116260489A

CN116260489A - Beam transmitting method and device

Info

Publication number: CN116260489A
Application number: CN202211103024.0A
Authority: CN
Inventors: 王洲; 王键; 刘云; 徐海博; 秦城
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2023-06-13
Also published as: WO2021218532A1; CN113572505A; CN113572505B

Abstract

A beam transmitting method and device, the method includes: the first communication device transmits a plurality of first beams in a first mode, the plurality of first beams carrying synchronization signals. The first communication device switches to a second mode, and the first communication device transmits a plurality of second beams in the second mode, wherein the number of the second beams is smaller than that of the first beams, and the second beams carry synchronous signals. Since the number of the plurality of second beams transmitted by the first communication apparatus in the second mode is smaller than the number of the plurality of first beams transmitted by the first communication apparatus in the first mode, it is possible to achieve reduction in power consumption overhead and resource overhead of the first communication apparatus.

Description

Beam transmitting method and device

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a beam transmitting method and apparatus.

Background

Beamforming is a signal processing technique that uses an array of sensors to directionally transmit and receive signals. The goal of beamforming is to establish and maintain a suitable beam pair. In the normal case, an optimal beam pair for downlink transmission is also the optimal beam pair for uplink transmission, called beam uniformity (beam correspondence).

In the prior art, in the scene that the network equipment and the terminal equipment establish beam pairs, the network equipment needs to apply a plurality of beams to send synchronous signals, and the network equipment and other power consumption insensitive equipment are not puzzled. However, for a transmitting end with a power saving (powersave) requirement or a device in a side-chain (sidelink) network (also referred to as an object direct link technology network), for example, in a scenario that a terminal device establishes a beam pair with a terminal device, if multiple beams are still applied to transmit a synchronization signal, there is a great consumption of power and resource waste in this way.

Disclosure of Invention

The embodiment of the application provides a beam transmitting method and device, which are used for solving the problems of power consumption and resource waste caused by adopting a plurality of beams to transmit synchronous signals.

In a first aspect, an embodiment of the present application provides a beam transmitting method, including:

the first communication device transmits a plurality of first beams in a first mode, the plurality of first beams carrying synchronization signals. The first communication device switches to the second mode. The first communication device transmits a plurality of second beams in a second mode, the number of the plurality of second beams being smaller than the number of the plurality of first beams, the plurality of second beams carrying synchronization signals.

With the above method, since the number of the plurality of second beams transmitted by the first communication apparatus in the second mode is smaller than the number of the plurality of first beams transmitted in the first mode, power consumption overhead and resource overhead of the first communication apparatus can be realized-reduced.

In one possible design, the number of the plurality of second beams is 6, or 8, or 12, or 16, or 24, or 32, or 36.

With the above design, the number of the plurality of second beams may be determined according to actual conditions or protocol specifications.

In one possible design, the number of first beams is 64.

In one possible design, the first communication device determines that the first preset condition is met to switch to the second mode. The first preset condition includes at least one condition of an electric quantity of the first communication device being lower than a preset electric quantity value, an amount of heating of the first communication device being greater than a preset heat quantity value, a moving speed of the first communication device being lower than a preset speed value, the first communication device being located in a preset area of a serving cell of the first communication device, and a channel quality parameter of the first communication device being greater than a preset value.

By adopting the design, the first communication device can switch modes when the first preset condition is met.

In one possible design, the second plurality of beams are omni-directional beams and the first plurality of beams are omni-directional beams.

In one possible design, the first communication device obtains first information, the first information being used to determine the plurality of second beams.

The first communication device determines a plurality of second beams from the first information.

With the above design, the first communication device can determine the plurality of second beams through the first information. Wherein the first information may also be referred to as side information, the first information comprising an implicit indication or an associative indication of the plurality of second beams.

In one possible design, the first communication device transmitting the plurality of second beams in the second mode may refer to the first communication device transmitting the plurality of second beams to the second communication device in the second mode. The first communication device determines that the second communication device is located in a first preset area according to the position information of the second communication device, wherein the first information comprises the position information of the second communication device. The first communication device determines a plurality of second beams according to the first preset area. The beam transmitting directions of the plurality of second beams correspond to the first preset area.

With the above-described design, the first communication device can determine the plurality of second beams by the position information of the second communication device.

In one possible design, the location information of the second communication device is global positioning system GPS information corresponding to the second communication device; alternatively, the location information of the second communication device is location information of the second communication device with respect to the first communication device.

In one possible design, the first communication device transmitting the plurality of second beams in the second mode may refer to the first communication device transmitting the plurality of second beams to the second communication device in the second mode. The first communication device determines a plurality of second beams from information indicating beam transmission directions of the plurality of second beams, the first information including information indicating beam transmission directions of the plurality of second beams.

With the above-described design, the first communication device can determine the plurality of second beams by the information indicating the beam transmission directions of the plurality of second beams.

In one possible design, the first information is provided by a network device connected to the second communication apparatus; alternatively, the first information is obtained by the first communication device via a bluetooth connection established with the second communication device; alternatively, the first information is measured by a sensor of the first communication device; alternatively, the first information is acquired by broadcast information transmitted by the second communication device.

With the above design, the first communication device can obtain the first information in various ways.

In one possible design, the first communication device determines a plurality of third beams, the plurality of third beams being determined after the plurality of second beams are rotated the same angle in the same direction. The first communication device transmits a plurality of third beams carrying synchronization signals.

By adopting the design, the first communication device transmits the synchronous signals by using a plurality of third beams, so that the first communication device can quickly establish the beam pair with better communication quality with other communication devices while reducing power consumption cost and resource cost.

In one possible design, the angle is determined based on the number of the plurality of first beams and the number of the plurality of second beams.

In one possible design, the first communication device is a first terminal device and the second communication device is a second terminal device; or the first communication device is a terminal device, and the second communication device is a network device; alternatively, the first communication device is a network device, and the second communication device is a terminal device.

In one possible design, the first communication device receives indication information from the second communication device, the indication information indicating that the first communication device switches to the first mode, the first communication device switches to the first mode.

With the above design, the first communication device can be retracted from the second mode to the first mode.

In one possible design, the first communication device determines that the second preset condition is met to switch to the first mode.

In one possible design, the first communication device receives configuration information from the network device, the configuration information being used to configure the first mode and the second mode.

With the above design, the network device may configure the second mode and the first mode for the first communication apparatus.

In a second aspect, an embodiment of the present application provides a beam transmitting method, including:

the first communication device receives signals transmitted by the network apparatus using a plurality of first beams. The first communication device transmits a synchronization signal using a plurality of second beams; the number of the plurality of second beams is smaller than the number of the plurality of first beams.

In one possible design, the first communication device receives configuration information from the network apparatus, the configuration information being used to instruct the first communication device to transmit synchronization signals using the plurality of second beams.

In a third aspect, embodiments of the present application provide a communication apparatus that may include a processing unit, a transmitting unit, and a receiving unit. It should be understood that the transmitting unit and the receiving unit may also be transceiving units here. When the apparatus is a terminal device or a network device, the processing unit may be a processor, and the transmitting unit and the receiving unit may be transceivers; the apparatus may further include a storage unit, which may be a memory; the storage unit is configured to store instructions, and the processing unit executes the instructions stored in the storage unit, so that the network device performs the method in any one of the possible designs of the first aspect or the second aspect. When the apparatus is a chip in a terminal device or a network device, the processing unit may be a processor, and the transmitting unit and the receiving unit may be input/output interfaces, pins, circuits, or the like; the processing unit executes instructions stored by the storage unit to cause the chip to perform the method of any one of the possible designs of the first aspect or the second aspect. The storage unit is used for storing instructions, and the storage unit may be a storage unit (for example, a register, a cache, etc.) in the chip, or may be a storage unit (for example, a read-only memory, a random access memory, etc.) located outside the chip in the network device.

In a fourth aspect, the present application also provides a computer readable storage medium storing a computer program which, when run on a computer, causes the computer to perform the method of the first or second aspect described above.

In a fifth aspect, the present application also provides a computer program product comprising a program which, when run on a computer, causes the computer to perform the method of the first or second aspect described above.

In a sixth aspect, the present application also provides a communication device comprising a processor and a memory; the memory is used for storing computer execution instructions; the processor is configured to execute computer-executable instructions stored in the memory to cause the communication device to perform the method of the first aspect or the second aspect described above.

In a seventh aspect, the present application also provides a communication device comprising a processor and an interface circuit; the interface circuit is used for receiving code instructions and transmitting the code instructions to the processor; the processor executes the code instructions to perform the methods of the first to second aspects described above.

Drawings

Fig. 1 is a schematic diagram of an application scenario in an embodiment of the present application;

FIG. 2 (a) is a schematic diagram of a scenario of a sidelink in an embodiment of the present application;

FIG. 2 (b) is a second schematic diagram of a scenario of a sidelink in an embodiment of the present application;

FIG. 3 is a schematic diagram of the structure of an SSB in an embodiment of the present application;

fig. 4 is a schematic diagram of a transmit beam hardware structure in an embodiment of the present application;

FIG. 5 is one of the flow charts outlining the beam-emitting method in the embodiments of the present application;

fig. 6 (a) is one of schematic diagrams of the location of the mobile phone a in the serving cell according to the embodiment of the present application;

fig. 6 (b) is a second schematic diagram of a location of a mobile phone a in a serving cell according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a plurality of second beams according to an embodiment of the present application;

FIG. 8 is a schematic diagram of a plurality of third beams according to an embodiment of the present application;

fig. 9 is a schematic diagram illustrating a relationship between a plurality of second beams and a preset area in an embodiment of the present application;

FIG. 10 is a second schematic diagram of a plurality of second beams according to an embodiment of the present application;

FIG. 11 is a second schematic view of a plurality of third beams according to an embodiment of the present application;

FIG. 12 is one of the flow charts outlining the beam-emitting method in the embodiments of the present application;

FIG. 13 is a schematic structural view of an apparatus according to an embodiment of the present disclosure;

FIG. 14 is a second schematic view of a device according to an embodiment of the present disclosure.

Detailed Description

Embodiments of the present application are described below with reference to the accompanying drawings.

The communication apparatus referred to in the embodiments of the present application may be a network device, a terminal device (e.g., a mobile phone or an unmanned aerial vehicle, etc.), a vehicle (e.g., a vehicle, a ship, an airplane, a robot, an electric car, etc.), a wearable device (e.g., glasses, headphones, a wristwatch, a head mounted visual (head mount display, HMD) device, etc.), or the communication apparatus may also be a chip or a sensing device, etc.

Wherein the network device is an entity in the network side for transmitting or receiving signals, such as a new generation base station (generation Node B, gNB). The network device may be a device for communicating with a mobile device. The network device may be an Access Point (AP) in a wireless local area network (wireless local area networks, WLAN), a base station (base transceiver station, BTS) in a global system for mobile communications (global system for mobile communications, GSM) or code division multiple access (code division multiple access, CDMA), a base station (NodeB, NB) in wideband code division multiple access (wideband code division multiple access, WCDMA), an evolved base station (evolutional Node B, eNB or eNodeB) in long term evolution (long term evolution, LTE), or a relay station or access point or access backhaul integration (integrated access and backhaul, IAB), or a vehicle device, a wearable device, and a network device in a future 5G network or a network device in a future evolved public land mobile network (public land mobile network, PLMN) network, or a gNodeB in a New Radio (NR) system, etc. In addition, in the embodiment of the present application, the network device provides services for the cell, and the terminal device communicates with the network device through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell. The network device in the embodiment of the present application may refer to a Central Unit (CU) or a Distributed Unit (DU), or the network device may also be composed of CU and DU. The CU and the DU may be physically separated or may be disposed together, which is not specifically limited in the embodiment of the present application. Furthermore, the network device may be other means of providing wireless communication functionality for the terminal device, as other possibilities. The embodiment of the application does not limit the specific technology and the specific device form adopted by the network device. For convenience of description, in the embodiments of the present application, an apparatus that provides a wireless communication function for a terminal device is referred to as a network device.

The terminal device may be a wireless terminal device capable of receiving network device scheduling and indication information, and the wireless terminal device may be a device providing voice and/or data connectivity to a user, or a handheld device having wireless connection functionality, or other processing device connected to a wireless modem. The wireless terminal device may communicate with one or more core networks or the internet via a radio access network (radio access network, RAN), which may be mobile terminal devices such as mobile phones (or so-called "cellular" phones), computers and data cards, which may be portable, pocket, hand-held, computer-built-in or vehicle-mounted mobile devices, for example, that exchange voice and/or data with the radio access network. Such as personal communication services (personal communications service, PCS) phones, cordless phones, session initiation protocol phones, wireless local loop (wireless local loop, WLL) stations, personal digital assistants (personal digital assistant, PDA), tablet computers (Pad), wireless transceiver enabled computers, and the like. The wireless terminal device may also be referred to as a system, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile Station (MS), remote station (AP), access Point (AP), remote terminal device (remote), access terminal device (access terminal), user terminal device (user terminal), user agent (user agent), user station (subscriber station, SS), user equipment (customer premises equipment, CPE), terminal (terminal), user Equipment (UE), mobile Terminal (MT), etc. The wireless terminal device may also be a wearable device as well as a next generation communication system, e.g. a terminal device in a 5G network or a terminal device in a future evolved PLMN network, a terminal device in an NR communication system, etc.

As communication technology evolves, the internet of everything continues to accelerate, and the third generation partnership project (3rd Generation Partnership Project,3GPP) has introduced support for vehicle-to-vehicle (V2V) and vehicle-to-everything (V2X) services in LTE during Release 14 and Release15 in order to extend the 3GPP platform to the automotive industry. NR V2X will complement LTE V2X to enable advanced V2X services and support interworking with LTE V2X.

The embodiment of the application can be applied to a power saving (powersave) scene, a Sidelink scene and other scenes with quick access requirements. In addition, the embodiment of the application may be applicable to other D2D scenes, such as cell phone watch interconnection, V2X, etc., and generally, the embodiment of the application is applicable to a scene of transmitting a signal by using a beam.

The powersave scene refers to a scene with a reduced power consumption requirement. Illustratively, in powersaving scenarios, the terminal device may choose to sleep and close the radio frequency link when there is no data transmission.

In the sidelink scene, data can be directly sent between two terminal devices, and an originating terminal does not need to send the data to network devices first and then forwards the data to a receiving terminal through a core network, so that the time delay of data transmission can be greatly reduced. The communication scenario of V2X sidelink is shown in fig. 2 (a) and 2 (b). In fig. 2 (a), the gNB, ng-eNB or eNB provides control or configuration for long term evolution co-located side chains (LTE V2X SL) and new wireless co-located side chains (NR V2X SL) between two vehicles. In fig. 2 (b), in a dual connectivity (NR EUTRA-Dual Connectivity, NE-DC) scenario of a 5G NR and 4G radio access network, NR V2X SL between two vehicles is the primary link and LTE V2X SL between two vehicles is the secondary link. In a double-connection (next generation E-UTRA NR-Dual Connectivity, NGEN-DC) scene of a 4G wireless access network and 5G NR under a 5G core network, LTE V2X SL between two vehicles is a main link, and NR V2XSL between the two vehicles is an auxiliary link. In the scene of double connection (E-UTRA NR-Dual Connectivity, EN-DC) of a 4G wireless access network and 5G NR, LTE V2X SL between two vehicles is a main link, and NR V2X SL between two vehicles is an auxiliary link.

In the NR system, the sidelink broadcast, the multicast and the unicast transmission between the terminal devices are supported in the coverage area of the network device and in the case of the coverage area and the partial coverage area. The physical channels for transmission include a physical direct link control channel (physical sidelink control channel, PSCCH), a physical direct link shared channel (physical sidelink shared channel, PSSCH), and a physical direct link feedback channel (physical sidelink feedback channel, PSFCH). In NR, the sidelink transmission is resource pool based. The resource pool is a logical concept, and one resource pool includes a plurality of physical resources. When the terminal equipment performs data transmission, the terminal equipment needs to select one physical resource from the resource pool for transmission. This process of resource selection may include, but is not limited to, the following two cases: firstly, the terminal equipment selects one resource from a resource pool to carry out data transmission according to the indication information of the network equipment; and secondly, the terminal equipment autonomously and randomly selects one resource from the resource pool to perform data transmission.

By way of example, embodiments of the present application may be particularly applicable, but not limited to, the following scenarios:

1. the network device establishes a beam pair scenario with the terminal device. For example, the eNB may transmit a synchronization signal to the UE using a plurality of beams or the UE may transmit a synchronization signal to the eNB using a plurality of beams.

2. The terminal equipment establishes a scene of beam pairs with the terminal equipment. For example, the handset may send a synchronization signal to the HMD using multiple beams, or the HMD may send a synchronization signal to the handset using multiple beams. Alternatively, vehicle a transmits a synchronization signal to vehicle B using a plurality of beams, and vehicle B transmits a synchronization signal to vehicle a using a plurality of beams.

It should be understood that the above application scenarios are exemplified and fig. 1, 2 (a) and 2 (b), and are not limiting of the present application. The network architecture and the service scenario described in the present application are for more clearly describing the technical solution of the present application, and do not constitute a limitation on the technical solution provided in the present application, and as a person of ordinary skill in the art can know, with evolution of the network architecture and appearance of a new service scenario, the technical solution provided in the present application is also applicable to similar technical problems.

The time-frequency structure of the synchronization signal block (synchronization signal block, SSB) is shown in fig. 3, and unlike LTE, the physical broadcast channel (physical broadcast channel, PBCH) and the primary synchronization signal (primary synchronization signal, PSS)/secondary synchronization signal (secondary synchronization signal, SSS) in NR are combined together, occupy 4 consecutive symbols in the time domain, occupy 20 RBs in the frequency domain, and constitute one SS/PBCH block. The subcarrier spacing supported by SSB is 15KHz/30KHz (below 6 GHz), 120KHz/240KHz (above 6 GHz).

Wherein, PSS and SSS occupy one symbol in each time domain, and occupy 127 Resource Elements (REs) in the frequency domain. PSS occupies symbol 0 in SS/PBCH Block, and SSS occupies symbol 2 in SS/PBCH Block. And the PBCH channel occupies the symbol 1 and the symbol 3 in the SS/PBCH block, wherein part of REs in the symbol 2 are also occupied.

SSB supports beam scanning and needs to be completed within 5ms, and in one radio frame SSB may be supported to be transmitted in the first 5ms (first half frame) or in the second 5ms (second half frame). The SSB groups of the beam scanning form SSB burst, the number of SSB groups in the SSB burst is called SSB burst size, and for Sub3G, maximum 4 SS/PBCH blocks are defined; defining 8 maximum SS/PBCH blocks for Sub 3G-Sub 6G; above 6G defines a maximum of 64 SS/PBCH blocks.

The SSB periods are 5ms,10ms,20ms,40ms,80ms and 160ms. At the initial cell search, the period of SSB is 20ms.

In most cases, signals can be transmitted in all directions or signals can be transmitted over a relatively wide angle when signals of a middle-low frequency band are used, depending on the physical characteristics of radio waves. However, in the case of using a high frequency band, particularly a very high frequency band, a large antenna array needs to be used, and the transmission signal is in the form of a beam.

The beam forming technology adjusts parameters of basic units of the phased array to enable signals of certain angles to obtain constructive interference and signals of other angles to obtain destructive interference, so that signal enhancement of certain angles and directions is achieved. The beamforming can be divided into three modes of digital beamforming, analog beamforming and mixed beamforming from the hardware realization. The three modes respectively realize the pre-weighting and then transmitting of the data from digital hardware, analog hardware and a mixed mode so as to generate a beam with directivity, the beam is aligned to the target terminal equipment, and simultaneously, the transmitting signals of multiple antennas are coherently overlapped at the target terminal equipment, thereby improving the demodulation signal-to-noise ratio of the target terminal equipment and improving the user experience of the cell edge. The beam forming weight changes along with the change of the wireless channel environment so as to ensure that the beam time is aligned to the target user.

The downlink weighting vector is generally obtained by beamforming, in which an uplink channel is measured by using a sounding reference signal (sounding reference signal, SRS), and weighting calculation is performed by algorithms such as eigen-beamforming (eigen beamforming, EBF), equal-gain transmission (equal gain transmission, EGT), maximum ratio transmission (maximal ratio transmission, MRT), etc.

As shown in fig. 4, S1 and S2 are two signals, w11, w21, w31, w41 are a set of precoding matrices, and w12, w22, w32, w42 are a set of precoding matrices. The result of multiplying S1 by w11 is summed with the result of multiplying S2 by w12, and the beam shown in fig. 3 can be transmitted through the antenna, and other beams can be obtained in the same manner. Wherein S1 and S2 are two codewords, or referred to as two data streams, S1 and S2 are calculated by the physical layer.

The provision of the 3gpp 38.101 protocol, 5G NR, mainly uses two-segment frequencies: FR1 band and FR2 band. The frequency range of the FR1 frequency band is 450 MHz-6 GHz, which is also called the traditional honeycomb frequency band (sub 6 GHz); the frequency range of the FR2 band is 24.25 GHz-52.6 GHz, namely the high-frequency millimeter wave (mmWave) band. The 5G NR protocol provides that beamforming is applicable to sub 6GHz frequency bands and mmWave frequency bands.

In general, beam management is divided into the following parts:

(1) Initial beam set up (initial beam establishment).

(2) Beam adjustment (beam adjustment), mainly used to accommodate movement and rotation of the terminal device, and slow changes in the environment.

(3) Beam recovery (beam recovery) to handle the case where the fast changing environment destroys the current beam pair.

The existing initial beam establishment flow is as follows:

the beam set-up initiator transmits a plurality of SSBs, which are transmitted in sequence and each of which is carried on a different beam. The SSB may be associated with a downlink beam, or may be associated with resources such as an uplink random access opportunity, a preamble, etc., so that a receiving end may acquire a relevant beam through a random access procedure, thereby establishing an initial beam pair. In the subsequent communication process, the receiving end keeps the beam used in random access and sends the beam as the optimal beam pair. Unless there are other mechanisms, the triggering receiving end selects the better beam pair.

The process of determining the optimal beam pair between the network device and the terminal device in one scenario is briefly described below. The network device is exemplified by the gNB, and the terminal device is exemplified by the UE.

After the UE is accessed into a connection state, the gNB executes the following process through the configured synchronous signal so as to determine the optimal beam pair between the gNB and the UE. Wherein the synchronization signal may be SSB.

Firstly, the gNB transmits the synchronous signals by applying different transmission beams at different moments, the UE measures the synchronous signals by adopting fixed receiving beams and reports the measurement result to the gNB so as to facilitate the gNB to select the optimal beam. Illustratively, the measurement results include synchronization signal received power (reference signal receiving power, RSRP) measurements and/or signal-to-noise ratio (signal noise ratio, SNR) for the different transmit beams, etc.

Then, the gNB always transmits a synchronization signal using the obtained optimal beam at different times, and the UE measures the synchronization signal transmitted by the gNB using different reception beams, thereby obtaining the optimal beam of the UE. For example, the UE uses different reception beams to measure the synchronization signal sent by the gNB, so as to obtain RSRP measurement values corresponding to the different reception beams, and the UE selects a reception beam corresponding to a maximum measurement value in the RSRP measurement values as an optimal beam.

Through the above process, the optimal beam determined by the gNB and the UE is the optimal beam pair, and through repeating the above process, the adjustment of the optimal beam pair can be realized, so as to continuously ensure that the gNB and the UE always work in the optimal beam pair.

However, in the above process, the maximum number of transmit beams of the gNB is 64, and there is no trouble for power consumption insensitive devices such as network devices. However, for a transmitting end with a power save requirement or a device in a sidelink network, if 64 beams are still applied to transmit the synchronization signal, there will be great power consumption and resource waste.

As shown in fig. 5, an embodiment of the present application provides a beam transmitting method, which includes:

step 500: the first communication device transmits a plurality of first beams in a first mode, the plurality of first beams carrying synchronization signals.

Step 510: the first communication device switches to the second mode.

It should be understood that the first mode refers to a non-energy saving mode, and the second mode is an energy saving mode. Or in turn, may be described as the energy saving requirement of the first mode being lower than the energy saving requirement of the second mode.

In one possible design, when the first communication device is a terminal device, the first communication device receives configuration information from the network device, the configuration information being used to configure the first mode and the second mode. For example, during the access of the first communication apparatus to the network device, the network device may send configuration information to the first communication apparatus, the configuration information being used to configure at least two different modes. For example, the network device may configure the first communication apparatus to have two different modes, a power saving mode and a non-power saving mode, respectively. For another example, the network device may configure the first communication apparatus to have three or more modes, and the energy saving levels corresponding to the three or more modes are different from each other.

Further, the first communication device determines that the first preset condition is satisfied and switches to the second mode. For example, the first communication device may monitor a parameter related to a first preset condition, and trigger a switch from the first mode to the second mode if it is determined that the first preset condition is met.

The first preset condition includes at least one condition of an electric quantity of the first communication device being lower than a preset electric quantity value, an amount of heating of the first communication device being greater than a preset heat quantity value, a moving speed of the first communication device being lower than a preset speed value, the first communication device being located in a preset area of a serving cell of the first communication device, and a channel quality parameter of the first communication device being greater than a preset value.

In an example, the first communication device monitors a channel quality parameter, where the channel quality parameter may include, but is not limited to, a channel quality indication (channel quality indication, CQI), a signal-to-noise ratio (signal noise ratio, SNR), etc., and if the first communication device determines that the channel quality parameter is greater than a preset value, e.g., the SNR is greater than a preset SNR value, or the CQI is greater than a preset CQI value and the SNR is greater than a preset SNR value, the first communication device switches from the first mode to the second mode.

In another example, the first communication device monitors the location of itself in the serving cell, as shown in fig. 6 (a), if the first communication device (e.g. handset a) is located in the central area of the serving cell, the communication quality between the first communication device and the network device is better, so the first communication device may switch from the first mode to the second mode, so as to achieve power consumption saving. As shown in fig. 6 (b), if the first communication device (e.g., the mobile phone a) is located in the edge area of the serving cell, the communication quality between the first communication device and the network device may be poor, so the first communication device continues to maintain the first mode and does not switch to the second mode, so as to ensure that the communication quality between the first communication device and the network device is not further degraded due to the mode switching.

Step 520: the first communication device transmits a plurality of second beams in a second mode, the number of the plurality of second beams being smaller than the number of the plurality of first beams, the plurality of second beams carrying synchronization signals.

In one possible design, the first communication device transmitting the plurality of second beams in the second mode may refer to the first communication device transmitting the plurality of second beams to the second communication device in the second mode. It should be understood that the first communication device transmitting the plurality of first beams in the first mode may refer to the first communication device transmitting the plurality of first beams to the second communication device in the first mode or transmitting the plurality of first beams to other communication devices.

The first communication device is a first terminal device, and the second communication device is a second terminal device; or the first communication device is a terminal device, and the second communication device is a network device; alternatively, the first communication device is a network device, and the second communication device is a terminal device.

For example, if the first communication device is a mobile phone, the second communication device is an HMD, the user holds the mobile phone with his own HMD to perform communication, the distance between the mobile phone and the HMD is relatively short, and the mobile phone may send a plurality of second beams to the HMD in the second mode. Alternatively, if the first communication device is a vehicle a, the second communication device is a vehicle B, the vehicle a and the vehicle B belong to a fleet, the vehicle a communicates with the vehicle B, and the vehicle a may transmit a plurality of second beams to the vehicle B in the second mode. Alternatively, the first communication device is a terminal device, the second communication device is a network device, the current power of the terminal device is low, for example, the power is lower than 20%, and the terminal device may send a plurality of second beams to the network device in the second mode.

Further, it should be understood that the synchronization signal involved in step 320 is functionally identical to the synchronization signal involved in step 300, but transmitted at a different time. The synchronization signal involved in step 320 and the synchronization signal involved in step 300 may be referred to as SSBs.

The number of the plurality of second beams and the beam transmission direction are explained below:

the number of the plurality of second beams is smaller than the number of the plurality of first beams for the number of the plurality of second beams.

In an example, the number of the plurality of first beams may be 64, and the number of the plurality of second beams may be 6, or 8, or 12, or 16, or 24, or 32, or 36. In another example, the number of the plurality of first beams may be 32, and the number of the plurality of second beams may be 6, or 8, or 12, or 16, or 24.

Wherein the first communication means may determine the number of the plurality of second beams by protocol specification or by receiving a configuration from the network device. Illustratively, the number of the plurality of second beams may be specified by a protocol or configured by the network device to be 1/N of the number of the plurality of first beams, N being a positive integer, and the number of the plurality of second beams being a positive integer.

In NR, the network device indicates beam information by transmitting configuration indications (transmission configuration indicator, TCIs), e.g., TCIs include an identification of the beam, each TCI indicated beam being either a transmit or a receive beam, where each beam corresponds to a TCI. The initially configured TCIs may be carried through RRC signaling, and the number of the plurality of first beams may be determined by the number of the initially configured TCIs. For example, the standard TCI includes 64 configurations in total, and the terminal device may determine that the number of the plurality of first beams is 64 by carrying 64 TCIs through RRC. Further, the network device may carry the TCI through a medium access control unit (medium access control control element, MAC CE), the terminal device may determine the number of the plurality of second beams through the number of TCIs carried by the MAC CE, or the network device may carry the TCI through downlink control information (downlink control information, DCI), and the terminal device may determine the number of the plurality of second beams through the number of TCIs carried by the DCI.

Further, in NR, the network device transmits 64 beams, and the terminal device selects 8 beams in which the signal is optimal as transmission beams. By adopting the method provided by the embodiment of the application, the first communication device is switched from the first mode to the second mode, the first communication device sends 64/M wave beams to the second communication device, and the second communication device can select 1-3 wave beams with optimal signals as sending wave beams, wherein M and 64/M are positive integers.

With the above design, since the number of the plurality of second beams is smaller than the number of the plurality of first beams, power consumption overhead and resource overhead can be reduced.

For the beam emission directions of the plurality of second beams, either one of the following two possible designs may be adopted:

a first possible design: the plurality of second beams are omni-directional beams and the plurality of first beams are omni-directional beams.

Wherein the plurality of second beams may be obtained by uniform reduction of the plurality of first beams. For example, the number of the plurality of first beams is N, and the number of the plurality of second beams may be 1/2, or 1/4, or 1/8, or 1/M, etc. of the number N of the plurality of first beams, where N, M and N/M are positive integers.

As illustrated in fig. 7, the number of the plurality of first beams is assumed to be 64 (not illustrated), and the number of the plurality of second beams is assumed to be 8, wherein the plurality of second beams can be regarded as being obtained by extracting one beam from the plurality of first beams every 7 beams.

In addition, after the first communication device adopts the second beam to transmit, a plurality of third beams can be further determined, wherein the plurality of third beams are determined after the plurality of second beams rotate by the same angle in the same direction, and the first communication device transmits the plurality of third beams, and the plurality of third beams carry synchronous signals. For example, as shown in fig. 8, on the basis of fig. 7, the plurality of second beams are rotated clockwise by the same angle θ to obtain a plurality of third beams. By adopting the design, the first communication device transmits the synchronous signals by using a plurality of third beams, so that the first communication device can quickly establish the beam pair with better communication quality with other communication devices while reducing power consumption cost and resource cost.

The rotation direction and/or rotation angle of the plurality of second beams may be preconfigured, or may be determined according to actual situations.

In an example, the angle may be determined based on a number of the plurality of first beams and a number of the plurality of second beams. For example, if the number of the first beams is 64, the number of the second beams is 32, and the second beams can be rotated clockwise or counterclockwise by 5.625 degrees to obtain the third beams, the third beams and the second beams form the first beams.

In another example, the angle may be determined according to a current channel quality of the first communication device or an area where the first communication device is currently located in the serving cell, which is not limited in this application.

In general, since the beam rotation is to cover a range where the plurality of second beams do not cover, the plurality of third beams obtained by the plurality of second beams rotated may cover a part of the range where the plurality of second beams do not cover, for example, the rotation angle may be 1/2 of the angle of the current adjacent beam, and the transmission of the plurality of third beams may be performed immediately after the completion of the transmission of the plurality of second beams. For example, if the number of the first beams is 64, the number of the second beams is 8, the second beams may be rotated clockwise or counterclockwise by 5.625 degrees to obtain a 1 st group of the third beams, further, the 1 st group of the third beams may be rotated clockwise or counterclockwise by 5.625 degrees to obtain a 2 nd group of the third beams, and so on, 7 groups of the third beams different from the second beams may be obtained. The plurality of second beams and the 7 sets of the plurality of third beams may constitute a plurality of first beams. Alternatively, if the number of the second beams is 8, the second beams may be rotated by 22.5 degrees clockwise or counterclockwise to obtain the third beams.

On the basis, the first communication device adopts a plurality of second beams to transmit, and then adopts a plurality of third beams obtained by rotating the plurality of second beams by the same angle in the same direction to transmit when transmitting next time, and adopts a plurality of fourth beams obtained by rotating the plurality of third beams by the same angle in the same direction to transmit after transmitting the plurality of third beams, and the like, so that the same or better coverage effect as the first beams can be achieved while the power consumption cost and the resource cost are reduced, and the communication quality is improved.

A second possible design: the plurality of second beams may be non-omni-directional beams and the plurality of first beams may be omni-directional beams. At this time, the first communication device needs to acquire first information, and determine a plurality of second beams according to the first information, where the first information is used to determine the plurality of second beams. Wherein the first information may also be referred to as side information, the first information comprising an implicit indication or an associative indication of the plurality of second beams.

The first information is illustratively provided by a network device connected to the second communication apparatus; alternatively, the first information is obtained by the first communication device via a bluetooth connection established with the second communication device; alternatively, the first information is measured by a sensor of the first communication device; alternatively, the first information is acquired by broadcast information transmitted by the second communication device. It should be understood that the first information may also be obtained by other manners, which are not limited in this embodiment of the present application.

In some embodiments, the first information includes location information of the second communication device.

The first communication device determines that the second communication device is located in a first preset area according to the position information of the second communication device, and the first communication device determines a plurality of second beams according to the first preset area. The beam transmitting directions of the plurality of second beams correspond to the first preset area. Accordingly, the beam emission directions of the plurality of second beams are partially oriented with respect to the beam emission directions of the plurality of first beams.

For example, when the first communication apparatus is a terminal device, the terminal device may autonomously establish and store the preset area, and the correspondence relationship between the beam transmission direction parameter and the beam hardware parameter. As shown in table 1 and fig. 9. The number of the preset areas is 4, and the preset areas are respectively from the preset area 1 to the preset area 4. The first communication device determines that the mobile phone is located in the preset area 1 according to the position information of the mobile phone, and further can determine the beam transmitting direction parameter and the beam hardware parameter corresponding to the preset area 1 according to the corresponding relation.

It should be understood that the precoding matrix shown in table 1 may be defined by a protocol. The baseband chip may determine the beam transmission directions of the plurality of second beams according to the beam transmission direction parameters (w 11, w21, w31, w 41). The baseband chip and/or control circuit (or control module) may send the beam hardware parameters [ resistor 1, voltage 1, current 1, inductance 1] to a parameter adjustment circuit, which is part of the radio frequency circuit. The radio frequency circuit transmits a plurality of second beams using beam hardware parameters [ resistor 1, voltage 1, current 1, inductor 1 ].

TABLE 1

Preset area	Beam emission direction parameters	Beam hardware parameters
			Preset area 1	(w11，w21，w31，w41)	Resistor 1, voltage 1, current 1, inductance 1]
Preset area 2	(w12，w22，w32，w42)	Resistor 2, voltage 2, current 2, inductance 2]
			Preset area 3	(w13，w23，w33，w43)	[ resistor 3, voltage 3, current 3, inductance 3 ]]
Preset area 3	(w14，w24，w34，w44)	[ resistor 4, voltage 4, current 4, inductance 4 ]]

In table 1, w11, w21, w31, w41 are beam transmission direction parameters corresponding to the preset area 1, and w11, w21, w31, w41 are a set of precoding matrices; w12, w22, w32, w42 are beam transmitting direction parameters corresponding to the preset area 2, and w12, w22, w32, w42 are a set of precoding matrices; w13, w23, w33, w43 are beam transmission direction parameters corresponding to the preset area 3, and w13, w23, w33, w43 are a set of precoding matrices; w14, w24, w34, w44 are beam transmission direction parameters corresponding to the preset area 4, and w14, w24, w34, w44 are a set of precoding matrices. The resistor 1, the voltage 1, the current 1 and the inductor 1 are beam hardware parameters corresponding to the preset area 1, the resistor 2, the voltage 2 and the current 2, the inductor 2 is beam hardware parameters corresponding to the preset area 2, the resistor 3, the voltage 3 and the current 3, the inductor 3 is beam hardware parameters corresponding to the preset area 3, the resistor 4, the voltage 4 and the current 4, and the inductor 4 is beam hardware parameters corresponding to the preset area 3.

It should be understood that the region division may take a variety of forms, and that the beam transmit direction parameters and the beam hardware parameters may also include other parameters. The area division method of fig. 9 and the parameters shown in table 1 are only examples, and are not limiting in the embodiments of the present application.

The location information of the second communication device may be global positioning system (global positioning system, GPS) information corresponding to the second communication device. Alternatively, the location information of the second communication device may be location information of the second communication device with respect to the first communication device. For example, a user holds a cell phone in a hand to communicate with a helmet worn by the user, and the helmet is positioned at the upper left of the cell phone.

Wherein the location information of the second communication device may be obtained by, but not limited to, a technology: GPS, global navigation satellite system (global navigation satellite system, GNSS), NR positioning technology (including small blocks), wireless internet (Wi-Fi) positioning, bluetooth (blue) positioning, ultra Wide Band (UWB) wireless communication technology, zigbee. UWB is a carrierless communication technique, in which UWB does not use a carrier, but rather uses a sequence of short energy pulses and spreads the pulses over a range of frequencies by orthogonal frequency division modulation or direct sequencing.

For example, when the first communication device communicates with the mobile phone a and the mobile phone B, the second beam shown in fig. 10 is determined according to the location information of the mobile phone a and the location information of the mobile phone B.

In some embodiments, the first information includes information indicating a beam transmission direction of the plurality of second beams.

The first communication device determines a plurality of second beams according to information indicating beam transmission directions of the plurality of second beams, wherein the second communication device is located in an area covered by the beam transmission directions of the plurality of second beams.

For example, the second communication device may actively report information indicating beam transmission directions of the plurality of second beams, the information being used to request the first communication device to transmit the beams to the second communication device according to the information. For example, the second communication device herein may be a UE or an HMD or the like.

The first communication device determines a plurality of third beams, and the plurality of third beams are determined after the plurality of second beams are rotated by the same angle θ in the same direction. The first communication device transmits a plurality of third beams carrying synchronization signals. As shown in fig. 11, on the basis of fig. 10, the plurality of second beams are rotated clockwise by the same angle to obtain a plurality of third beams. By adopting the design, the first communication device transmits the synchronous signals by using a plurality of third beams, so that the first communication device can quickly establish the beam pair with better communication quality with other communication devices while reducing power consumption cost and resource cost.

In addition, the embodiment of the application also provides a possible implementation manner that the second mode is retracted to the first mode.

In one possible implementation, the first communication device receives indication information from the second communication device, the indication information indicates that the first communication device switches to the first mode, and the first communication device switches from the second mode to the first mode according to the indication information.

For example, the second communication apparatus determines that the signal quality of the plurality of second beams is poor by measuring the plurality of second beams transmitted by the first communication apparatus, and the second communication apparatus may transmit indication information to the first communication apparatus, the indication information indicating that the first communication apparatus switches to the first mode.

In another possible design, the first communication device switches from the second mode to the first mode if it determines that the second preset condition is met. The second preset condition may be related to the first preset condition, and illustratively, the second preset condition includes at least one of an electric quantity of the first communication device being higher than a preset electric quantity value, an amount of heat generated by the first communication device being smaller than a preset heat quantity value, a moving speed of the first communication device being higher than a preset speed value, the first communication device being located in an edge area of a serving cell of the first communication device, and a channel quality parameter of the first communication device being smaller than a preset value. For example, the first communication device determines that the self power is lower than 20%, and the first communication device switches from the first mode to the second mode, and after a period of time, if the current power of the first communication device is higher than 20%, the first communication device switches from the second mode to the first mode, or if the current power of the first communication device is higher than 30%, the first communication device switches from the second mode to the first mode. Thus, the correlation threshold setting in the first preset condition may be the same as or different from the correlation threshold setting in the second preset condition. In addition, the second preset condition may be unrelated to the first preset condition, which is not limited in the embodiment of the present application.

In the method, beam establishment between the Sidelink is considered, two terminal devices establish Sidelink beam pairs through the PC5, and specific signals such as SSB and the like are adopted for beam pairing according to a timing mechanism.

Based on this, as shown in fig. 12, an embodiment of the present application provides a beam transmitting method, which includes:

step 1200: the first communication device receives signals transmitted by the network apparatus using a plurality of first beams.

The signal herein may be a synchronization signal or other types of signals, such as a data signal, which is not limited in this application.

Step 1210: the first communication device transmits the synchronization signal using a plurality of second beams, the number of the plurality of second beams being smaller than the number of the plurality of first beams.

The first communication apparatus applying the plurality of second beams to transmit the synchronization signal may mean that the first communication apparatus applies the plurality of second beams to transmit the synchronization signal to the network device or other terminal devices.

In some embodiments, the first communication device receives configuration information from the network apparatus, the configuration information being used to instruct the first communication device to transmit synchronization signals using the plurality of second beams.

Illustratively, in the sidelink scenario, the maximum number of beams to which the terminal device transmits the synchronization signal is smaller than the maximum number of beams to which the network device transmits the synchronization signal. The maximum number of beams for which the terminal device transmits the synchronization signal may be configured by the terminal device in a pre-configured or configured form by the network device. For example, the maximum number of beams applied by the sidelink scene is 1/M of the maximum number of beams applied by the Uu scene, and M is a positive integer. For another example, for the FR1 band, the original 64 beams are changed to 64/M beams. For the FR2 band, the original 64 beams are changed into 64/M beams.

In the NR standard, the network device indicates beam information via TCIs, e.g., TCIs include an identification of beams, each TCI indicated beam being either a transmit beam or a receive beam, where each beam corresponds to a TCI. The initially configured TCIs may be carried through RRC signaling, and the number of the plurality of first beams may be determined by the number of the initially configured TCIs. For example, the standard TCI includes 64 configurations in total, and the terminal device may determine that the number of the plurality of first beams is 64 by carrying 64 TCIs through RRC. Further, the network device may carry the TCI through the MAC CE, the terminal device may determine the number of the plurality of second beams through the number of TCIs carried by the MAC CE, or the network device may carry the TCI through the DCI, and the terminal device may determine the number of the plurality of second beams through the number of TCIs carried by the DCI.

Further, in NR, the network device transmits 64 beams, and the terminal device selects 8 beams in which the signal is optimal as transmission beams. By adopting the method provided by the embodiment of the application, the first communication device sends 64/M beams to the second communication device, and the second communication device can select 1-3 beams with the optimal signals as sending beams, wherein M and 64/M are positive integers.

In one possible design, the first communication device transmitting the synchronization signal using the plurality of second beams may refer to the first communication device transmitting the synchronization signal to the second communication device using the plurality of second beams. The first communication device is a first terminal device, and the second communication device is a second terminal device; alternatively, the first communication device is a terminal device, and the second communication device is a network device.

For example, if the first communication device is a mobile phone, the second communication device is an HMD, the user holds the mobile phone with his own HMD to perform communication, the distance between the mobile phone and the HMD is relatively short, and the mobile phone may apply a plurality of second beams to send synchronization signals to the helmet. Alternatively, if the first communication device is a vehicle a, the second communication device is a vehicle B, the vehicle a and the vehicle B belong to a fleet, the vehicle a communicates with the vehicle B, and the vehicle a may transmit the synchronization signal to the vehicle B by using a plurality of second beams.

In addition, after the first communication device transmits by using the second beam, a plurality of third beams may be further determined, where the plurality of third beams are determined after the plurality of second beams are rotated by the same angle in the same direction. The first communication device transmits a plurality of third beams carrying synchronization signals. For example, as shown in fig. 8, on the basis of fig. 7, the plurality of second beams are rotated clockwise by the same angle θ to obtain a plurality of third beams. By adopting the design, the first communication device transmits the synchronous signals by using a plurality of third beams, so that the first communication device can quickly establish the beam pair with better communication quality with other communication devices while reducing power consumption cost and resource cost.

A second possible design: the plurality of second beams may also be non-omni-directional beams and the plurality of first beams may be omni-directional beams. At this time, the first communication device needs to acquire first information, and determine a plurality of second beams according to the first information, where the first information is used to determine the plurality of second beams. Wherein the first information may also be referred to as side information, the first information comprising an implicit indication or an associative indication of the plurality of second beams.

The first information may include, but is not limited to, the following two possible designs:

For example, when the first communication apparatus is a terminal device, the network device may configure a plurality of preset areas for the terminal device, and the correspondence between the preset areas and the beam transmission direction parameters and the beam hardware parameters. As shown in table 1 and fig. 9. The network device may configure the first communication apparatus with 4 preset areas, which are preset area 1 to preset area 4 respectively. The first communication device determines that the mobile phone is located in the preset area 1 according to the position information of the mobile phone, and further can determine the beam transmitting direction parameter and the beam hardware parameter corresponding to the preset area 1 according to the corresponding relation.

The location information of the second communication device is GPS information corresponding to the second communication device. Alternatively, the location information of the second communication device is location information of the second communication device with respect to the first communication device. For example, a user holds a cell phone in a hand to communicate with a helmet worn by the user, and the helmet is positioned at the upper left of the cell phone.

Wherein the location information of the second communication device may be obtained by, but not limited to, a technology: GPS, GNSS, NR positioning technology (including small blocks), wifi positioning, blue positioning, UWB wireless communication technology, zigbee. UWB is a carrierless communication technique, in which UWB does not use a carrier, but rather uses a sequence of short energy pulses and spreads the pulses over a range of frequencies by orthogonal frequency division modulation or direct sequencing.

In another possible design, the first information includes information indicating beam transmission directions of the plurality of second beams.

For example, the second communication device may actively report information indicating beam transmission directions of the plurality of second beams, the information being used to request the first communication device to transmit the beams to the second communication device according to the information.

In the embodiments provided in the present application, each scheme of the communication method provided in the embodiments of the present application is described from the perspective of each network element itself and from the perspective of interaction between each network element. It will be appreciated that the various network elements, such as network devices and terminal devices, in order to implement the above-described functions, comprise corresponding hardware structures and/or software modules that perform the various functions. Those of skill in the art will readily appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

As with the above concepts, as shown in fig. 13, the embodiment of the present application further provides an apparatus 1300, where the apparatus 1300 includes a transceiver unit 1302 and a processing unit 1301.

In one example, the apparatus 1300 is configured to implement the functionality of the first communication apparatus in the above method. The device may also be a system-on-chip in the first communication device.

A transceiver 1302, configured to transmit a plurality of first beams in a first mode, where the plurality of first beams carry synchronization signals;

a processing unit 1301 configured to switch to a second mode;

the transceiver 1302 is configured to send a plurality of second beams in the second mode, where the number of the plurality of second beams is smaller than the number of the plurality of first beams, and the plurality of second beams carries a synchronization signal.

Processing unit 1301 invokes transceiver unit 1302, configured to receive signals sent by the network device by applying the plurality of first beams;

transmitting a synchronization signal using a plurality of second beams; the number of the plurality of second beams is less than the number of the plurality of first beams.

For specific execution of the processing unit 1301 and the transceiver unit 1302, reference may be made to the description in the above method embodiment. The division of the modules in the embodiments of the present application is schematically only one logic function division, and there may be another division manner in actual implementation, and in addition, each functional module in each embodiment of the present application may be integrated in one processor, or may exist separately and physically, or two or more modules may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules.

As another alternative variant, the device may be a system-on-chip. In the embodiment of the application, the chip system may be formed by a chip, and may also include a chip and other discrete devices. Illustratively, the apparatus includes a processor and interface circuitry for receiving code instructions and transmitting to the processor; the processor executes the code instructions to perform the methods of the various embodiments described above. The processor performs the functions of the processing unit 1301, and the interface circuit performs the functions of the transceiver unit 1302.

As with the concepts described above, the present embodiment also provides an apparatus 1400, as shown in fig. 14. The apparatus 1400 includes: a communication interface 1401, at least one processor 1402, and at least one memory 1403. A communication interface 1401 provides for communication via a transmission medium with other devices such that an apparatus used in apparatus 1400 may communicate with the other devices. A memory 1403 for storing a computer program. The processor 1402 invokes the computer program stored in the memory 1403 to perform the method of the above embodiment by transceiving data through the communication interface 1401.

Illustratively, when the device is a first communication device, the memory 1403 is for storing a computer program; the processor 1402 invokes the computer program stored in the memory 1403 to perform the method performed by the first communication device in the above-described embodiment through the communication interface 1401.

In the present embodiment, the communication interface 1401 may be a transceiver, circuit, bus, module, or other type of communication interface. The processor 1402 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and may implement or perform the methods, steps and logic blocks disclosed in the embodiments of the present application. The general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in the processor for execution. The memory 1403 may be a nonvolatile memory such as a Hard Disk Drive (HDD) or a Solid State Drive (SSD), or may be a volatile memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be a circuit or any other device capable of implementing a memory function. A memory 1403 is coupled to the processor 1402. The coupling in the embodiments of the present application is a spaced coupling or communication connection between devices, units or modules, and may be in electrical, mechanical or other forms, for information interaction between devices, units or modules. As another implementation, the memory 1403 may also be located outside of the apparatus 1400. The processor 1402 may operate in conjunction with the memory 1403. The processor 1402 may execute program instructions stored in the memory 1403. At least one of the at least one memory 1403 may also be included in the processor 1402. The connection medium between the communication interface 1401, the processor 1402, and the memory 1403 is not limited to the above-described embodiments. For example, the embodiments of the present application may be connected between the memory 1403, the processor 1402, and the communication interface 1401 by buses in fig. 14, which may be divided into address buses, data buses, control buses, and the like.

It will be appreciated that the apparatus of the embodiment shown in fig. 13 described above may be implemented with the apparatus 1400 shown in fig. 14. In particular, the processing unit 1301 may be implemented by the processor 1402, and the transceiver unit 1302 may be implemented by the communication interface 1401.

The present application also provides a computer-readable storage medium storing a computer program which, when run on a computer, causes the computer to perform the methods shown in the above embodiments.

Embodiment 1, a beam transmitting method, wherein the method includes:

the first communication device transmits a plurality of first beams in a first mode, the plurality of first beams carrying synchronization signals;

the first communication device switches to a second mode;

the first communication device transmits a plurality of second beams in the second mode, the number of the plurality of second beams being smaller than the number of the plurality of first beams, the plurality of second beams carrying synchronization signals.

Embodiment 2, the method for transmitting beams according to embodiment 1, wherein the number of the plurality of second beams is 6, or 8, or 12, or 16, or 24, or 32, or 36.

Embodiment 3, the method for transmitting a beam according to embodiment 1 or embodiment 2, wherein the number of the plurality of first beams is 64.

Embodiment 4, the method for transmitting a beam according to any one of embodiments 1 to 3, wherein the first communication device switches to a second mode, includes:

in the embodiment, the first communication device determines that a first preset condition is met, and switches to the second mode;

the first preset condition includes at least one condition of an electric quantity of the first communication device being lower than a preset electric quantity value, an amount of heat generated by the first communication device being greater than a preset heat quantity value, a moving speed of the first communication device being lower than a preset speed value, the first communication device being located in a preset area of a serving cell of the first communication device, and a channel quality parameter of the first communication device being greater than a preset value.

Embodiment 5 provides the beam transmitting method according to any one of embodiments 1 to 4, wherein the plurality of second beams are omni-directional beams, and the plurality of first beams are omni-directional beams.

Embodiment 6, the method for transmitting a beam according to any one of embodiments 1 to 4, further includes:

the first communication device obtains first information, wherein the first information is used for determining the plurality of second beams;

The first communication device determines the plurality of second beams from the first information.

Embodiment 7 is the beam transmitting method according to embodiment 6, wherein the first communication device transmits a plurality of second beams in the second mode, including:

the first communication device transmitting a plurality of second beams to a second communication device in the second mode;

the first communication device determining a plurality of second beams according to the first information, including:

the first communication device determines that the second communication device is positioned in a first preset area according to the position information of the second communication device; the first information includes location information of the second communication device;

the first communication device determines the plurality of second beams according to the first preset area;

wherein the beam transmitting directions of the plurality of second beams correspond to the first preset area.

Embodiment 8, the method for transmitting a beam according to embodiment 7, wherein the location information of the second communication device is global positioning system GPS information corresponding to the second communication device; alternatively, the location information of the second communication device is location information of the second communication device with respect to the first communication device.

Embodiment 9 is the beam transmitting method according to embodiment 6, the first communication device transmitting a plurality of second beams in the second mode, including:

the first communication device determining the plurality of second beams according to information indicating beam transmission directions of the plurality of second beams; the first information includes information indicating beam transmission directions of the plurality of second beams.

Embodiment 10, the method for transmitting a beam according to any one of embodiments 7 to 9, wherein the first information is provided by a network device connected to the second communication apparatus; or the first information is acquired by the first communication device through a Bluetooth connection established with the second communication device; alternatively, the first information is measured by a sensor of the first communication device; alternatively, the first information is acquired through broadcast information transmitted by the second communication device.

Embodiment 11, the method for transmitting a beam according to any one of embodiments 7 to 10, wherein the first communication device is a first terminal device, and the second communication device is a second terminal device; or the first communication device is a terminal device, and the second communication device is a network device; or the first communication device is a network device, and the second communication device is a terminal device.

Embodiment 12, the method for transmitting a beam according to any one of embodiments 7 to 11, further includes:

the first communication device receives indication information from the second communication device, wherein the indication information indicates the first communication device to switch to the first mode;

the first communication device switches to the first mode.

Embodiment 13, the method for transmitting a beam according to any one of embodiments 1 to 11, further includes:

the first communication device determines that a second preset condition is satisfied and switches to the first mode.

Embodiment 14, the method for transmitting a beam according to any one of embodiments 1 to 13, further includes:

the first communication device determines a plurality of third beams, wherein the third beams are determined after the second beams rotate by the same angle in the same direction;

the first communication device transmits the plurality of third beams, the plurality of third beams carrying synchronization signals.

Embodiment 15 provides the beam transmitting method according to embodiment 14, wherein the angle is determined according to the number of the plurality of first beams and the number of the plurality of second beams.

Embodiment 16, the beam transmitting method according to any one of embodiments 1 to 13, further comprising:

The first communication device receives configuration information from a network device, the configuration information being used to configure the first mode and the second mode.

Embodiment 17, a method for beam transmission, wherein the method includes:

the first communication device receives signals transmitted by the network equipment by using a plurality of first beams;

the first communication device transmits a synchronization signal using a plurality of second beams; the number of the plurality of second beams is less than the number of the plurality of first beams.

The embodiment 18, the method for transmitting a beam according to embodiment 17, further comprising:

the first communication device receives configuration information from the network equipment, wherein the configuration information is used for indicating the first communication device to apply the plurality of second beams to send synchronous signals.

Embodiment 19, the method for transmitting a beam according to embodiment 17 or embodiment 18, wherein the number of the plurality of second beams is 6, or 8, or 12, or 16, or 24, or 32, or 36.

Embodiment 20 provides the beam transmitting method of embodiment 19, wherein the number of the first plurality of beams is 64.

Embodiment 21 provides the beam transmitting method according to any one of embodiments 17 to 20, wherein the plurality of second beams are omni-directional beams, and the plurality of first beams are omni-directional beams.

Embodiment 22, the method for transmitting a beam according to any one of embodiments 17 to 20, further includes:

Embodiment 23 is the method for transmitting a beam according to embodiment 22, wherein the first communication device transmits a synchronization signal using a plurality of second beams, including:

the first communication device transmits a synchronization signal to the second communication device using a plurality of second beams;

Embodiment 24, the method for transmitting a beam according to embodiment 23, wherein the location information of the second communication device is global positioning system GPS information corresponding to the second communication device; alternatively, the location information of the second communication device is location information of the second communication device with respect to the first communication device.

Embodiment 25 is the method for transmitting a beam according to embodiment 22, wherein the first communication device applies a plurality of second beams to transmit a synchronization signal, including:

Embodiment 26, the method for transmitting a beam according to any one of embodiments 23 to 25, wherein the first information is provided by a network device connected to the second communication apparatus; or the first information is acquired by the first communication device through a Bluetooth connection established with the second communication device; alternatively, the first information is measured by a sensor of the first communication device; alternatively, the first information is acquired through broadcast information transmitted by the second communication device.

Embodiment 27, the method for transmitting a beam according to any one of embodiments 22 to 26, wherein the first communication device is a first terminal device, and the second communication device is a second terminal device; the first communication device is a terminal device, and the second communication device is a network device.

Embodiment 28, the method for transmitting a beam according to any one of embodiments 17 to 27, further comprising:

Embodiment 29 provides the beam transmitting method of embodiment 28, wherein the angle is determined according to the number of the plurality of first beams and the number of the plurality of second beams.

Embodiment 30, a beam transmitting apparatus, wherein the apparatus is a first communication apparatus, the apparatus comprising:

a transceiver unit, configured to transmit a plurality of first beams in a first mode, where the plurality of first beams carry synchronization signals;

a processing unit for switching to a second mode;

the transceiver unit is configured to transmit a plurality of second beams in the second mode, where the number of the plurality of second beams is smaller than the number of the plurality of first beams, and the plurality of second beams carries a synchronization signal.

Embodiment 31, the beam transmitting device of embodiment 30, wherein the number of the plurality of second beams is 6, or 8, or 12, or 16, or 24, or 32, or 36.

The beam transmitting device of embodiment 32, embodiment 30 or embodiment 31, wherein the number of the first plurality of beams is 64.

An embodiment 33 of the beam transmitting device according to any one of embodiments 30 to 32, wherein the processing unit is configured to determine that a first preset condition is met, and switch to the second mode;

Embodiment 34 is the beam transmitting apparatus of any one of embodiments 30 to 33, wherein the second plurality of beams are omni-directional beams and the first plurality of beams are omni-directional beams.

Embodiment 35, the beam transmitting device according to any one of embodiments 30 to 33, wherein the processing unit invokes the transceiver unit to obtain first information, where the first information is used to determine the plurality of second beams;

The processing unit is used for determining the plurality of second beams according to the first information.

An embodiment 36 is the beam transmitting device according to embodiment 35, wherein the transceiver unit is configured to send a plurality of second beams to a second communication device in the second mode;

the processing unit is used for determining that the second communication device is positioned in a first preset area according to the position information of the second communication device; the first information includes location information of the second communication device; determining the plurality of second beams according to the first preset area;

An embodiment 37 is the beam transmitting device of embodiment 36, wherein the location information of the second communication device is global positioning system GPS information corresponding to the second communication device; alternatively, the location information of the second communication device is location information of the second communication device with respect to the first communication device.

An embodiment 38 is the beam transmitting device according to embodiment 35, wherein the transceiver unit is configured to send a plurality of second beams to a second communication device in the second mode;

The processing unit is used for determining the plurality of second beams according to the information indicating the beam transmitting directions of the plurality of second beams; the first information includes information indicating beam transmission directions of the plurality of second beams.

Embodiment 39, the beam transmitting apparatus according to any one of embodiments 36 to 38, wherein the first information is provided by a network device connected to the second communication apparatus; or the first information is acquired by the first communication device through a Bluetooth connection established with the second communication device; alternatively, the first information is measured by a sensor of the first communication device; alternatively, the first information is acquired through broadcast information transmitted by the second communication device.

Embodiment 40, the beam transmitting apparatus according to any one of embodiments 36 to 39, wherein the first communication apparatus is a first terminal device, and the second communication apparatus is a second terminal device; or the first communication device is a terminal device, and the second communication device is a network device; or the first communication device is a network device, and the second communication device is a terminal device.

Embodiment 41, the beam transmitting device according to any one of embodiments 36 to 40, wherein the transceiver unit is further configured to receive indication information from the second communication device, where the indication information indicates that the first communication device switches to the first mode;

the processing unit is used for switching to the first mode.

An embodiment 42 of the beam transmitting device according to any one of embodiments 30 to 40, wherein the processing unit is configured to determine that a second preset condition is met to switch to the first mode.

Embodiment 43, the beam transmitting apparatus according to any one of embodiments 30 to 42, wherein the processing unit is configured to determine a plurality of third beams, where the plurality of third beams are determined after the plurality of second beams rotate by the same angle in the same direction;

the transceiver unit is configured to send the plurality of third beams, where the plurality of third beams carry synchronization signals.

Embodiment 44 the beam transmitting device of embodiment 43, the angle is determined according to a number of the plurality of first beams and a number of the plurality of second beams.

Embodiment 45 is the beam transmitting apparatus according to any one of embodiments 30 to 44, wherein the transceiver unit is configured to receive configuration information from a network device, where the configuration information is used to configure the first mode and the second mode.

Embodiment 46, a beam transmitting apparatus, wherein the apparatus comprises:

the processing unit is used for receiving signals sent by the network equipment by applying a plurality of first beams;

Embodiment 47 is the beam transmitting apparatus of embodiment 46, wherein the transceiver unit is configured to receive configuration information from the network device, where the configuration information is used to instruct the first communication device to apply the plurality of second beams to send synchronization signals.

The beam emitting device of embodiment 48, or embodiment 46 or embodiment 47, wherein the number of the plurality of second beams is 6, or 8, or 12, or 16, or 24, or 32, or 36.

Embodiment 49 is the beam transmitting device of embodiment 48, wherein the number of the first plurality of beams is 64.

Embodiment 50 is the beam transmitting apparatus of any one of embodiments 46 to 49, wherein the second plurality of beams are omni-directional beams and the first plurality of beams are omni-directional beams.

Embodiment 51, the beam transmitting device according to any one of embodiments 46 to 49, further comprising:

The processing unit is used for calling the receiving and transmitting unit and is used for acquiring first information, and the first information is used for determining the plurality of second beams;

Embodiment 52, the beam transmitting device of embodiment 51, the transceiver unit is configured to apply a plurality of second beams to transmit a synchronization signal to a second communication device;

the processing unit is used for determining that the second communication device is positioned in a first preset area according to the position information of the second communication device; the first information includes location information of the second communication device;

determining the plurality of second beams according to the first preset area;

An embodiment 53 is the beam transmitting device of embodiment 52, wherein the location information of the second communication device is global positioning system GPS information corresponding to the second communication device; alternatively, the location information of the second communication device is location information of the second communication device with respect to the first communication device.

Embodiment 54 of the beam transmitting device of embodiment 51, the transceiver unit is configured to apply a plurality of second beams to transmit a synchronization signal to a second communication device;

Embodiment 55, the beam transmitting apparatus according to any one of embodiments 52 to 54, wherein the first information is provided by a network device connected to the second communication apparatus; or the first information is acquired by the first communication device through a Bluetooth connection established with the second communication device; alternatively, the first information is measured by a sensor of the first communication device; alternatively, the first information is acquired through broadcast information transmitted by the second communication device.

Embodiment 56, the beam transmitting apparatus according to any one of embodiments 52 to 55, wherein the first communication apparatus is a first terminal device, and the second communication apparatus is a second terminal device; the first communication device is a terminal device, and the second communication device is a network device.

Embodiment 57 of the beam transmitting apparatus according to any one of embodiments 52 to 56, wherein the processing unit is configured to determine a plurality of third beams, where the plurality of third beams are determined after the plurality of second beams rotate by the same angle in the same direction;

Embodiment 58 the beam transmitting apparatus of embodiment 57, wherein the angle is determined according to a number of the plurality of first beams and a number of the plurality of second beams.

Embodiment 59, an electronic device, wherein the electronic device includes a transceiver, a processor, and a memory; program instructions are stored in the memory; the program instructions, when executed, cause the apparatus to perform the beam transmitting method as described in any one of embodiments 1 to 16.

Embodiment 60, an electronic device, wherein the electronic device comprises a transceiver, a processor, and a memory; program instructions are stored in the memory; the program instructions, when executed, cause the apparatus to perform the beam transmitting method as described in any one of embodiments 17 to 29.

Embodiment 61, a chip, where the chip is coupled to a memory in an electronic device, such that the chip, when running, invokes program instructions stored in the memory, implementing a beam emission method as in any of embodiments 1 to 29.

Embodiment 62, a computer readable storage medium comprising program instructions which, when run on a device, cause the device to perform the beam firing method according to any of embodiments 1 to 29.

Embodiment 63, a computer program product comprising a program which, when run on a computer, causes the computer to perform the beam firing method as described in any one of embodiments 1 to 29 above.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present application may take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to encompass such modifications and variations.

Claims

1. A method of beam transmission, the method comprising:

the first communication device switches to a second mode;

the first communication device transmits a plurality of second beams in the second mode, the number of the plurality of second beams being smaller than the number of the plurality of first beams, the plurality of second beams carrying synchronization signals;

the first communication device switches to the first mode.

2. The method of claim 1, wherein the number of the plurality of second beams is 6, or 8, or 12, or 16, or 24, or 32, or 36.

3. The method of claim 1 or 2, wherein the number of the plurality of first beams is 64.

4. A method according to any of claims 1-3, wherein the first communication device switches to a second mode comprising:

The first communication device determines that a first preset condition is met and switches to the second mode;

5. The method of any of claims 1-4, wherein the plurality of second beams are omni-directional beams and the plurality of first beams are omni-directional beams.

6. The method of any one of claims 1-4, further comprising:

7. The method of claim 6, wherein the first communication device transmitting a plurality of second beams in the second mode comprises:

8. The method of claim 7, wherein the location information of the second communication device is global positioning system, GPS, information corresponding to the second communication device; alternatively, the location information of the second communication device is location information of the second communication device with respect to the first communication device.

9. The method of claim 6, wherein the first communication device transmitting a plurality of second beams in the second mode comprises:

10. A method according to any of claims 7-9, wherein the first information is provided by a network device connected to the second communication means; or the first information is acquired by the first communication device through a Bluetooth connection established with the second communication device; alternatively, the first information is measured by a sensor of the first communication device; alternatively, the first information is acquired through broadcast information transmitted by the second communication device.

11. The method according to any of claims 7-10, wherein the first communication device is a first terminal equipment and the second communication device is a second terminal equipment; or the first communication device is a terminal device, and the second communication device is a network device; or the first communication device is a network device, and the second communication device is a terminal device.

12. The method of any one of claims 1-11, further comprising:

13. The method of any one of claims 1-12, further comprising:

14. The method of claim 13, wherein the angle is determined based on a number of the plurality of first beams and a number of the plurality of second beams.

15. The method of any one of claims 1-12, further comprising:

16. A method of beam transmission, the method comprising:

17. The method as recited in claim 16, further comprising:

18. An apparatus comprising a transceiver, a processor, and a memory; program instructions are stored in the memory; the program instructions, when executed, cause the apparatus to perform the method of any of claims 1 to 17.

19. A chip, characterized in that the chip is coupled to a memory in an electronic device such that the chip, when run, invokes program instructions stored in the memory, implementing the method according to any of claims 1 to 17.

20. A computer readable storage medium comprising program instructions which, when run on a device, cause the device to perform the method of any of claims 1 to 17.