阅读说明：本技术 通信装置、通信方法以及程序 (Communication device, communication method, and program ) 是由 草岛直纪 示沢寿之 松田大辉 于 2018-05-10 设计创作，主要内容包括：[问题]在进行波束调节的情形下提供能够更稳定地使用的无线链路。[方案]一种通信装置,包括：控制单元,进行控制使得向终端装置发送分别与彼此不同的天线信息关联的多个参考信号；和获得单元,在向终端装置发送随机接入过程中的随机接入响应之后,从终端装置获得与所述多个参考信号中的至少相关参考信号对应的控制信息。控制单元基于与所获得的控制信息对应的天线信息控制之后的与终端装置的通信。([ problem ] to provide a radio link that can be used more stably in the case of beam adjustment. [ solution ] A communication apparatus includes: a control unit that controls so as to transmit, to a terminal apparatus, a plurality of reference signals each associated with antenna information different from each other; and an obtaining unit that obtains, from the terminal apparatus, control information corresponding to at least a relevant reference signal among the plurality of reference signals after transmitting a random access response in a random access procedure to the terminal apparatus. The control unit controls communication with the terminal device after that based on antenna information corresponding to the obtained control information.)

1. A communication device, comprising:

a control unit that controls so as to transmit a plurality of reference signals associated with antenna information different from each other to a terminal apparatus; and

an obtaining unit that obtains control information corresponding to at least any one of the plurality of reference signals from the terminal apparatus after transmitting a random access response in a random access procedure to the terminal apparatus

The control unit controls communication with the terminal device after that based on antenna information corresponding to the obtained control information.

2. The communication device of claim 1, wherein

The control unit controls setting of an antenna associated with communication of the terminal device based on the obtained control information after obtaining the control information in the random access procedure.

3. The communication device of claim 1, wherein

An obtaining unit obtains control information corresponding to two or more of the plurality of reference signals from a terminal device; and

the control unit determines two or more pieces of antenna information for communication with the terminal device based on the obtained control information.

4. The communication device of claim 1, wherein

The control unit

Determining first antenna information associated with communication with the terminal device before transmitting a random access response to the terminal device in a random access procedure;

determining second antenna information associated with communication with the terminal device based on the obtained control information after transmitting the random access response; and

controlling communication with the terminal device after obtaining the control information based on at least either of the first antenna information or the second antenna information.

5. The communication device of claim 4, wherein

The control unit

Controlling communication with the terminal device based on the first antenna information before transmitting the random access response; and

controlling communication with the terminal device based on the second antenna information after transmitting the random access response.

6. The communication device of claim 4, wherein

In communication with a terminal device after obtaining control information, the control unit

Controlling communication with the terminal device based on the first antenna information in the case of initially transmitting the transmission data, an

In the case of retransmitting the transmission data, communication with the terminal apparatus is controlled based on the second antenna information.

7. The communication device of claim 4, wherein

The control unit

Controlling communication with the terminal device based on the first antenna information in a case where a signal is transmitted via a physical channel belonging to a first search space, and

controlling communication with the terminal device based on the second antenna information when a signal is transmitted via a physical channel belonging to a second search space different from the first search space.

8. The communication device of claim 4, wherein

The control unit

Controlling communication with the terminal device based on the first antenna information in a case where a signal is transmitted using a first symbol, an

Controlling communication with the terminal device based on the second antenna information in a case where a signal is transmitted using a second symbol different from the first symbol.

9. The communication device of claim 1, wherein

The control unit controls so that a plurality of synchronization signal blocks are transmitted as the plurality of reference signals to terminal apparatuses within a communication range.

10. The communication device of claim 1, wherein

The control unit

Controlling so as to notify information associated with transmission conditions of each of the plurality of reference signals to a terminal apparatus; and

control so that the plurality of reference signals are transmitted to the terminal device in accordance with the transmission condition.

11. The communication device of claim 1, wherein

The control unit controls so that the directivity of a transmission signal associated with communication with a terminal device becomes higher than the directivity of the reference signal.

12. The communication device of claim 1, wherein

The antenna information includes information associated with setting of at least any one of a channel, a path, an antenna, or an antenna port.

13. A communication device, comprising:

a selection unit that selects at least a part of a plurality of reference signals transmitted from a base station and associated with antenna information different from each other, the part of the plurality of reference signals being selected according to a reception result of the reference signals; and

a notification unit that notifies the base station of control information corresponding to the selected reference signal after receiving a random access response transmitted from the base station in a random access procedure.

14. The communication device of claim 13, wherein

The selection unit performs a predetermined measurement on each of the plurality of reference signals and selects at least a part of the reference signals according to a measurement result.

15. The communication device of claim 14, wherein

The selection unit measures at least either one of communication quality or received power of the reference signal as the measurement.

16. The communication device of claim 14, wherein

The notification unit

Notifying a base station of control information corresponding to a first reference signal selected from the plurality of reference signals before receiving a random access response, an

Notifying the base station of control information corresponding to a difference in measurement results between the first reference signal and a second reference signal different from the first reference signal and selected from the plurality of reference signals after receiving the random access response.

17. The communication device of claim 13, wherein

The notifying unit notifies the base station of control information corresponding to the selected two or more reference signals after receiving the random access response.

18. A method of communication by a computer, the method comprising:

control so that a plurality of reference signals associated with antenna information different from each other are transmitted to the terminal apparatus;

obtaining control information corresponding to at least any one of the plurality of reference signals from the terminal apparatus after transmitting a random access response in a random access procedure to the terminal apparatus; and

controlling communication with the terminal apparatus after based on the antenna information corresponding to the obtained control information.

19. A method of communication by a computer, the method comprising:

selecting at least a part of a plurality of reference signals transmitted from a base station and associated with antenna information different from each other, the part of the plurality of reference signals being selected according to a reception result of the reference signals; and

notifying the base station of control information corresponding to the selected reference signal after receiving a random access response transmitted from the base station in a random access procedure.

20. A program for causing a computer to execute:

control so that a plurality of reference signals associated with antenna information different from each other are transmitted to the terminal apparatus;

obtaining control information corresponding to at least any one of the plurality of reference signals from the terminal apparatus after transmitting a random access response in a random access procedure to the terminal apparatus; and

controlling communication with the terminal apparatus after based on the antenna information corresponding to the obtained control information.

21. A program for causing a computer to execute:

selecting at least a part of a plurality of reference signals transmitted from a base station and associated with antenna information different from each other, the part of the plurality of reference signals being selected according to a reception result of the reference signals; and

notifying the base station of control information corresponding to the selected reference signal after receiving a random access response transmitted from the base station in a random access procedure.

Technical Field

The present disclosure relates to a communication apparatus, a communication method, and a program.

Background

Wireless access methods and wireless networks for cellular mobile communication (hereinafter also referred to as "Long Term Evolution (LTE)", "LTE-advanced (LTE-a)", "LTE-advanced Pro (LTE-a Pro)", "New Radio (NR)", "New Radio Access Technology (NRAT)", "Evolved Universal Terrestrial Radio Access (EUTRA)" or "further EUTRA (feutra)) have been studied in the third generation partnership project (3 GPP). Note that in the following description, LTE includes LTE-A, TTE-a pro and EUTRA, and NR includes NRAT and FEUTRA. A base station apparatus (base station) in LTE is also referred to as eNodeB (evolved NodeB). The base station apparatus (base station) in NR is also referred to as a gbnodeb. The terminal apparatus (mobile station, mobile station apparatus, or terminal) in each of LTE and NR is also referred to as UE (user equipment). Each of LTE and NR is a cellular communication system in which a plurality of areas covered by a base station apparatus are configured in the form of cells. A single base station apparatus may manage a plurality of cells.

NR, which is a next generation wireless access system of LTE, is a RAT (radio access technology) different from LTE. NR is an access technology capable of coping with various use cases including eMBB (enhanced mobile broadband), mtc (mass machine type communication), and URLLC (ultra high reliable low delay communication). In each of these use cases of NR, NR has been studied with a view to providing a technical framework coping with use scenarios, requirement conditions, configuration scenarios, and the like.

NR performs beamforming (beamforming) in order to achieve coverage extension, high-quality communication, and the like. By aligning the directions of the transmission and reception beams of the base station apparatus and the terminal apparatus in an appropriate direction, a high quality link can be provided. The appropriate beam varies with the movement of the terminal device and the variation of the channel quality. Therefore, beam management is performed between the base station apparatus and the terminal apparatus at a time. Details of beam management are disclosed in NPL 1, for example.

[ citation list ]

[ non-patent document ]

[NPL 1]

Huawei,HiSilicon,“Beam Management Procedure for NR MIMO,”R1-166089,3GPP TSG RAN WG1 Meeting#86,Gothenburg,Sweden,August,2016.

Disclosure of Invention

[ problem ] to

Meanwhile, in the case of performing the above-described beam management, it is an important object to provide a wireless link that can be used in a stable manner. In particular, in the case where an unstable radio link is provided between the base station apparatus and the terminal apparatus during the random access procedure, it is difficult to complete the procedure. In this case, the start of communication may become difficult.

Accordingly, the present disclosure proposes a communication apparatus, a communication method, and a program capable of providing a wireless link usable in a more stable manner in the case of performing beam management.

[ solution to problems ]

According to the present disclosure, there is provided a communication apparatus including: a control unit that controls so as to transmit a plurality of reference signals associated with antenna information different from each other to a terminal apparatus; and an obtaining unit that obtains control information corresponding to at least any one of the plurality of reference signals from the terminal apparatus after transmitting a random access response in a random access procedure to the terminal apparatus. The control unit controls communication with the terminal device after that based on antenna information corresponding to the obtained control information.

Further, according to the present disclosure, there is provided a communication apparatus including: a selection unit that selects at least a part of a plurality of reference signals transmitted from a base station and associated with antenna information different from each other, the part of the plurality of reference signals being selected according to a reception result of the reference signals; and a notification unit that notifies the base station of control information corresponding to the selected reference signal after receiving a random access response transmitted from the base station in a random access procedure.

Further, according to the present disclosure, there is provided a communication method performed by a computer, the method including: control so that a plurality of reference signals associated with antenna information different from each other are transmitted to the terminal apparatus; obtaining control information corresponding to at least any one of the plurality of reference signals from the terminal apparatus after transmitting a random access response in a random access procedure to the terminal apparatus; and controlling communication with the terminal apparatus after based on the antenna information corresponding to the obtained control information.

Further, according to the present disclosure, there is provided a communication method performed by a computer, the method including: selecting at least a part of a plurality of reference signals transmitted from a base station and associated with antenna information different from each other, the part of the plurality of reference signals being selected according to a reception result of the reference signals; and notifying the base station of control information corresponding to the selected reference signal after receiving a random access response transmitted from the base station in a random access procedure.

Further, according to the present disclosure, there is provided a program causing a computer to execute: control so that a plurality of reference signals associated with antenna information different from each other are transmitted to the terminal apparatus; obtaining control information corresponding to at least any one of the plurality of reference signals from the terminal apparatus after transmitting a random access response in a random access procedure to the terminal apparatus; and controlling communication with the terminal apparatus after based on the antenna information corresponding to the obtained control information.

Further, according to the present disclosure, there is provided a program causing a computer to execute: selecting at least a part of a plurality of reference signals transmitted from a base station and associated with antenna information different from each other, the part of the plurality of reference signals being selected according to a reception result of the reference signals; and notifying the base station of control information corresponding to the selected reference signal after receiving a random access response transmitted from the base station in a random access procedure.

[ advantageous effects of the invention ]

As described above, according to the present disclosure, there are provided a communication apparatus, a communication method, and a program capable of providing a wireless link usable in a more stable manner in the case of performing beam management.

Note that the advantageous effects to be produced are not limited to the above-described advantageous effects. Any of the advantages given in this specification, or other advantages that can be expected from this specification, may be produced in addition to or in place of the advantages described above.

Drawings

Fig. 1 is a diagram illustrating a setting example of component carriers according to one embodiment of the present disclosure.

Fig. 2 is a diagram showing a setting example of component carriers according to the embodiment.

Fig. 3 is a diagram of an example of a downlink subframe of NR according to an embodiment.

Fig. 4 is a diagram of an example of an uplink subframe of NR according to an embodiment.

Fig. 5 is a schematic block diagram showing the configuration of the base station apparatus of the embodiment.

Fig. 6 is a schematic block diagram showing the configuration of the terminal apparatus 2 of the embodiment.

Fig. 7 is a diagram showing an example of a frame configuration of self-contained transmission according to the embodiment.

Fig. 8 is a schematic block diagram showing an example of the configuration of the digital antenna according to the present embodiment.

Fig. 9 is a schematic block diagram showing another example of the configuration of the digital antenna according to the present embodiment.

Fig. 10 is an explanatory diagram for explaining an outline of an example of the single beam operation.

Fig. 11 is an explanatory diagram for explaining an outline of an example of the multi-beam operation.

Fig. 12 is a diagram showing an example of an initial connection process of a terminal apparatus.

Fig. 13 is a diagram showing an example of the configuration of the synchronization signal block.

Fig. 14 is a diagram showing an example of the configuration of the synchronization signal burst (burst) and the synchronization signal burst set (burst set).

Fig. 15 is a diagram showing an example of system information corresponding to a synchronization signal block.

Fig. 16 is a diagram showing an example of a sequence of system information corresponding to a synchronization signal block.

Fig. 17 is a diagram showing an example of a correspondence table representing correspondence between time indexes and CRC masks.

Fig. 18 is a diagram showing a communication sequence example of initial beam selection in NR.

Fig. 19 is a diagram showing an example of a beam type in beam refinement (refinement).

Fig. 20 is a diagram illustrating an example of a communication sequence in beam management according to the embodiment.

Fig. 21 is a diagram illustrating an example of a communication sequence in beam management according to the embodiment.

Fig. 22 is a block diagram showing a first example of a schematic configuration of an eNB.

Fig. 23 is a block diagram showing a second example of the schematic configuration of an eNB.

Fig. 24 is a block diagram showing an example of a schematic configuration of a smartphone.

Fig. 25 is a block diagram showing an example of a schematic configuration of a car navigation device.

Detailed Description

Preferred embodiments according to the present disclosure are described in detail below with reference to the accompanying drawings. Note that components having substantially the same functional configurations are given the same reference numerals in the present specification and the drawings, and therefore, description thereof will not be repeated.

Note that the description is given in the following order.