CN107182120B - A kind of method and device of random access - Google Patents
A kind of method and device of random access Download PDFInfo
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- CN107182120B CN107182120B CN201610131410.9A CN201610131410A CN107182120B CN 107182120 B CN107182120 B CN 107182120B CN 201610131410 A CN201610131410 A CN 201610131410A CN 107182120 B CN107182120 B CN 107182120B
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 230000005540 biological transmission Effects 0.000 claims abstract description 30
- 230000001360 synchronised effect Effects 0.000 claims abstract description 25
- 238000012790 confirmation Methods 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims description 16
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 9
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005562 fading Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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Abstract
The present invention provides a kind of method and device of random access, and the method for the random access includes: the cell synchronous signal for detecting base station and sending, and determines the arrival bearing of the cell synchronous signal；According to the arrival bearing of the cell synchronous signal, the target sending direction of accidental access signal is determined；The accidental access signal is sent up in the target sender；The confirmation signal that the base station is sent on the arrival bearing of the accidental access signal is received, the base station is accessed.The embodiment of the present invention in access procedure, obtains optimum beam figuration direction in base station and terminal, the data transmission of both sides later can apriority carried out with optimal beam, ensure that the performance of data link；And the method for random access access delay under high band is low, it is practical.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for random access.
Background
For a high frequency band (carrier frequency greater than 6GHz) mobile communication network, both the base station and the terminal need to use highly directional beams and to be aligned with each other. To maintain high gain of the link. Generally, for a mobile station in a connected state, the quality of a beam can be estimated by using reference information to find the best beam matching direction, and a measurement report, such as a beam index, is sent to a base station by control signaling to track the beam direction to maintain the beamforming gain. However, in some cases, the initial beam direction may be random, such as initial access to the network, recovery from radio link failure, and initiation of handover, and in particular, the best transmit and receive beam pair may not be known in advance when the mobile station initiates random access because of the above time.
For random access of a high-frequency terminal, different from a low-frequency terminal, beam forming is needed to compensate large-scale fading of signals, and a relatively perfect scheme is not provided at present.
For a high-band mobile network, there is no doubt that beamforming gain is needed to compensate for propagation path loss, which is required to be consistent for data transmission in a connection state, common signal transmission, and random access signal transmission. Since the optimal beam matching direction is unknown, the mobile station can only transmit random access preambles (rachpreambles) in multiple beam directions, and it is expected that the receiving end tries to find an aligned beam, so that finding one beam among multiple beams can achieve high-gain beamforming gain. This idea is relatively intuitive and easy to think. Firstly, the terminal repeatedly sends RACH Preamble in a plurality of directions to cover most directions as much as possible; the base station attempts reception in all directions, detects the preamble and confirms the best transmit and receive beam indices. Subsequent steps of the RACH procedure, however, may employ the best transmit and receive beam pair to align the beams for maximum gain. However, this scheme has a great problem, only a few of the directions covered by the beam directions of multiple preambles in the first step can achieve high beamforming gain, that is, most of the Preamble transmit beams and receive beams are not aligned, which may cause the RACH Preamble duration to be very long, and may generate a great negative impact on initial access, RLF recovery, handover, TDD cell throughput and beam scheduling, resulting in that the scheme cannot be used.
Disclosure of Invention
The invention aims to provide a random access method and a random access device, which solve the problem that the random access time delay is longer because a transmitting beam and a receiving beam are always misaligned when the high-frequency terminal random access in the prior art adopts beam forming to compensate the large-scale fading of signals.
In order to achieve the above object, an embodiment of the present invention provides a random access method, including:
detecting a cell synchronization signal sent by a base station, and determining the incoming wave direction of the cell synchronization signal;
determining a target sending direction of a random access signal according to the incoming wave direction of the cell synchronization signal;
transmitting the random access signal in the target transmitting direction;
and receiving an acknowledgement signal sent by the base station in the incoming wave direction of the random access signal, and accessing the base station.
The method for detecting the cell synchronization signal sent by the base station and determining the incoming wave direction of the cell synchronization signal comprises the following steps:
and detecting a cell synchronization signal transmitted by the base station by using the wide wave beam, and determining the incoming wave direction of the cell synchronization signal.
Wherein, the step of determining the target sending direction of the random access signal according to the incoming wave direction of the cell synchronization signal comprises:
under the condition of time division duplex, determining the incoming wave direction of the cell synchronizing signal as the target sending direction of the random access signal; or,
under the condition of frequency division duplex, counting the incoming wave directions of cell synchronous signals on different frequency bands, and determining the target sending directions of random access signals of different frequency bands; or,
and under the full-duplex condition, determining the incoming wave direction of the cell synchronization signal as the target sending direction of the random access signal.
Wherein the step of transmitting the random access signal in the target transmission direction comprises:
transmitting the random access signal with a wide beam in the target transmitting direction; or,
and transmitting the random access signal by using an optimal beam in the direction of the target transmitting party.
Wherein, the receiving the determination signal sent by the base station in the incoming wave direction of the random access signal, the accessing the base station includes:
receiving an acknowledgement signal sent by the base station by using a narrow beam in the incoming wave direction of the random access signal;
and confirming the access of the base station according to the confirmation signal.
Wherein, after receiving the acknowledgement signal sent by the base station in the incoming wave direction of the random access signal, the method further comprises:
and carrying out data transmission with the base station by utilizing narrow beams.
The embodiment of the invention also provides a random access method, which comprises the following steps:
transmitting a cell synchronization signal;
the detection terminal determines a random access signal sent backward by a target sending party of the random access signal in the direction of the target sending party based on the incoming wave direction of the cell synchronization signal, and determines the incoming wave direction of the random access signal;
and sending a confirmation signal in the incoming wave direction of the random access signal to confirm the access of the terminal.
Wherein the step of transmitting the cell synchronization signal comprises:
the cell synchronization signal is transmitted using the wide beam.
Wherein the step of transmitting an acknowledgement signal in an incoming wave direction of the random access signal comprises:
and transmitting an acknowledgement signal by using a narrow beam in the incoming wave direction of the random access signal.
Wherein after the sending of the acknowledgement signal in the incoming wave direction of the random access signal, the method further comprises:
and carrying out data transmission with the terminal by utilizing the narrow beam.
The embodiment of the present invention further provides a random access apparatus, including:
the synchronous signal detection module is used for detecting a cell synchronous signal sent by a base station and determining the incoming wave direction of the cell synchronous signal;
a sending direction determining module, configured to determine a target sending direction of a random access signal according to an incoming wave direction of the cell synchronization signal;
an access signal sending module, configured to send the random access signal in the target sending direction;
and the receiving module is used for receiving the confirmation signal sent by the base station in the incoming wave direction of the random access signal and accessing the base station.
Wherein the synchronization signal detection module comprises:
and the synchronous signal detection submodule is used for detecting the cell synchronous signal sent by the base station by using the wide wave beam and determining the incoming wave direction of the cell synchronous signal.
Wherein the sending direction determining module comprises:
a first sending direction determining submodule, configured to determine, under a time division duplex condition, that an incoming wave direction of the cell synchronization signal is a target sending direction of the random access signal; or,
the second sending direction determining submodule is used for counting the incoming wave directions of the cell synchronizing signals on different frequency bands under the condition of frequency division duplex and determining the target sending directions of the random access signals of the different frequency bands; or,
and the third sending direction determining submodule is used for determining the incoming wave direction of the cell synchronizing signal as the target sending direction of the random access signal under the full duplex condition.
Wherein, the access signal sending module comprises:
a first access signal transmitting sub-module for transmitting the random access signal using a wide beam in the target transmitting direction; or,
and the second access signal sending submodule is used for sending the random access signal by using an optimal beam in the direction of the target sending party.
Wherein the receiving module comprises:
a receiving unit, configured to receive an acknowledgement signal sent by the base station using a narrow beam in an incoming wave direction of the random access signal;
and the access unit is used for confirming the access to the base station according to the confirmation signal.
Wherein the apparatus further comprises:
and the first data transmission module is used for carrying out data transmission with the base station by utilizing narrow beams.
The embodiment of the present invention further provides a random access apparatus, including:
a first sending module, configured to send a cell synchronization signal;
a detection module, configured to detect a random access signal sent by a target sender of a random access signal backwards in a direction of the target sender based on an incoming wave direction of the cell synchronization signal, and determine the incoming wave direction of the random access signal;
and the second sending module is used for sending a confirmation signal in the incoming wave direction of the random access signal to confirm the access of the terminal.
Wherein the first transmitting module comprises:
and the first transmission sub-module is used for transmitting the cell synchronization signal by using the wide beam.
Wherein the second sending module comprises:
and the second sending submodule is used for sending an acknowledgement signal by using a narrow beam in the incoming wave direction of the random access signal.
Wherein the apparatus further comprises:
and the second data transmission module is used for carrying out data transmission with the terminal by utilizing the narrow beam.
The technical scheme of the invention at least has the following beneficial effects:
in the method and the device for random access of the embodiment of the invention, the terminal acquires the optimal incoming wave direction according to the cell synchronization signal sent by the base station, thereby determining the target sending direction of the random access signal according to the optimal incoming wave direction; the base station sends the confirmation signal in the incoming wave direction of the random access signal, so that the base station and the terminal can measure the incoming wave direction of the opposite terminal more accurately, the time delay problem of random access is solved, and the random access efficiency of the terminal is improved.
Drawings
Fig. 1 is a flow chart illustrating the basic steps of a random access method according to a first embodiment of the present invention;
fig. 2 is a flow chart illustrating the basic steps of a random access method according to a second embodiment of the present invention;
fig. 3 is a schematic location diagram of a high-frequency band base station and a terminal according to an embodiment of the present invention;
fig. 4 is a block diagram illustrating a random access apparatus according to a third embodiment of the present invention;
fig. 5 is a block diagram of a random access apparatus according to a fifth embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
It should be noted that the random access method provided in the embodiment of the present invention specifically refers to a method for a terminal to randomly access a high frequency band base station, so the random access method mainly relates to methods at a terminal side and a base station side. Specifically, as shown in the high-frequency band base station and the terminal in fig. 3, the coverage area of the base station is divided into 6 sectors, each sector has 60 degrees, the control channel and the dedicated channel all use beamforming, and the terminal also uses beamforming technology to ensure cell coverage and link performance.
First embodiment
As shown in fig. 1, a first embodiment of the present invention provides a method for random access at a terminal side, where the method for random access includes:
step 11, detecting a cell synchronization signal sent by a base station, and determining an incoming wave direction of the cell synchronization signal;
step 12, determining a target sending direction of a random access signal according to the incoming wave direction of the cell synchronizing signal;
step 13, sending the random access signal in the direction of the target sender;
and step 14, receiving a confirmation signal sent by the base station in the incoming wave direction of the random access signal, and accessing the base station.
In the first embodiment of the present invention, the terminal detects the downlink cell synchronization signal sent by the base station, and can obtain the optimal incoming wave direction of the downlink signal, that is, the incoming wave direction of the cell synchronization signal. The terminal can determine the target sending direction of the random access signal which needs to be sent by the terminal according to the incoming wave direction of the cell synchronizing signal, so that the random access signal is sent in the target sending direction; and the terminal can adopt narrow wave beams to align the terminal for wave beam forming in the incoming wave direction of the random access signal, thereby improving the probability of random access of the terminal.
Specifically, in the first embodiment of the present invention, step 11 is:
step 111, detecting a cell synchronization signal sent by the base station by using the wide beam, and determining an incoming wave direction of the cell synchronization signal.
In the embodiment of the invention, the base station firstly adopts the low-dimensional wide beam forming to send the cell synchronization signal, and the cell coverage performance is considered. By transmitting cell synchronization signals in turns over a wide beam, terminals within a sector can detect valid synchronization signals faster than narrow beams. For example, if the sector is 60 degrees and the Half Power Beam Width (HPBW) is 20 degrees, the coverage sector period is 3; and if the half-power beam width is 10 degrees, the coverage sector period is 6. Obviously, the wide beam is more suitable for the terminal to detect the synchronization signal and the incoming wave direction on the premise of having a certain gain.
Specifically, in the first embodiment of the present invention, step 12 is:
step 121, determining an incoming wave direction of the cell synchronization signal as a target sending direction of the random access signal under a time division duplex condition; or,
step 122, under the condition of frequency division duplex, counting the incoming wave directions of the cell synchronization signals on different frequency bands, and determining the target sending directions of the random access signals of different frequency bands; or,
and step 123, determining the incoming wave direction of the cell synchronization signal as the target sending direction of the random access signal under the full duplex condition.
In the above embodiments of the present invention, different processing methods are provided for different duplex modes. Specifically, when the base station and the terminal adopt a Time Division Duplex (TDD) mode, according to the reciprocity of a TDD channel, the terminal takes the incoming wave direction of the detected cell synchronizing signal as the target sending direction of the uplink random access signal; when the base station and the terminal adopt a Frequency Division Duplex (FDD) mode, because the coverage area of a high-frequency-band cell is small, the direct path is strong or the probability of the reflection path is high, the terminal detects the incoming wave direction of the synchronous signal of the downlink cell, and counts the incoming wave direction to obtain the target sending direction of the uplink random access signal on different frequency bands; on the premise of meeting the same frequency interference suppression of the system, the base station and the terminal can also work under the full duplex condition, similar to the TDD mode, and the terminal takes the detected incoming wave direction of the cell synchronizing signal as the target sending direction of the uplink random access signal.
Specifically, step 13 in the first embodiment of the present invention includes:
step 131, transmitting the random access signal by using a wide beam in the target transmitting direction; or,
and step 132, transmitting the random access signal by using an optimal beam in the target transmitting direction.
In the above embodiments of the present invention, in order to ensure the transmission power of the random access signal, the terminal transmits in a beam forming manner; specifically, two cases are distinguished, the first case: the number of antenna elements of the terminal is large, the effective beam width can be classified, a low-dimensional wide beam is selected at first, and the gain of a transmitted signal is improved; in the second case: the smaller the number of antenna elements of the terminal, the signal is transmitted directly in the optimal (or narrowest) beam that can be supported by the antenna array of the terminal. And consistent with the consideration of using the wide beam when the base station transmits the cell synchronization signal in step 11, the terminal transmits the random access signal using the wide beam, which is also beneficial for the base station to detect the signal.
Specifically, in the first embodiment of the present invention, step 14 includes:
step 141, receiving an acknowledgement signal sent by the base station by using a narrow beam in an incoming wave direction of the random access signal;
and step 142, confirming the access of the base station according to the confirmation signal.
In the above embodiments of the present invention, after detecting the incoming wave direction of the random access signal, the base station sends the acknowledgement signal in the incoming wave direction, so that the terminal accesses the base station.
After the terminal and the base station carry out information interaction of random access, the measurement of the incoming wave direction is more accurate, and the narrow wave beam is adopted to be beneficial to ensuring better link quality during data communication. I.e. after step 14, the method further comprises:
and step 15, carrying out data transmission with the base station by using narrow beams.
The random access method provided by the first embodiment of the present invention determines the downlink incoming wave direction through the cell synchronization signal, and determines the uplink incoming wave direction through the random access signal, so that the base station and the terminal obtain the optimal beamforming direction during the access process, and then the data transmission between the base station and the terminal can be performed with the optimal (or narrowest) beam a priori, thereby ensuring the performance of the data link; and the random access method has low access time delay in a high frequency band and strong practicability.
Second embodiment
As shown in fig. 2, a second embodiment of the present invention provides a method for random access on a base station side, where the method for random access includes:
step 21, sending a cell synchronization signal;
step 22, the detection terminal determines a random access signal sent backward by a target sender of the random access signal in the direction of the target sender based on the incoming wave direction of the cell synchronization signal, and determines the incoming wave direction of the random access signal;
and step 23, sending a confirmation signal in the incoming wave direction of the random access signal to confirm the access of the terminal.
In the above embodiments of the present invention, the terminal detects the downlink cell synchronization signal sent by the base station, and can obtain the optimal incoming wave direction of the downlink signal, that is, the incoming wave direction of the cell synchronization signal. The terminal can determine the target sending direction of the random access signal which needs to be sent by the terminal according to the incoming wave direction of the cell synchronizing signal, so that the random access signal is sent in the target sending direction; and the terminal can adopt narrow wave beams to align the terminal for wave beam forming in the incoming wave direction of the random access signal, thereby improving the probability of random access of the terminal.
Specifically, step 21 in the second embodiment of the present invention includes:
step 211, transmitting the cell synchronization signal using the wide beam.
In the embodiment of the invention, the base station firstly adopts the low-latitude wide wave beam forming to send the cell synchronous signal, and the cell coverage performance is considered. By transmitting cell synchronization signals in turns over a wide beam, terminals within a sector can detect valid synchronization signals faster than narrow beams. For example, if the sector is 60 degrees and the Half Power Beam Width (HPBW) is 20 degrees, the coverage sector period is 3; and if the half-power beam width is 10 degrees, the coverage sector period is 6. Obviously, the wide beam is more suitable for the terminal to detect the synchronization signal and the incoming wave direction on the premise of having a certain gain.
Specifically, step 23 in the second embodiment of the present invention includes:
step 231, transmitting an acknowledgement signal by using a narrow beam in an incoming wave direction of the random access signal.
In the above embodiment of the present invention, since the incoming wave direction of the random access signal has been confirmed, that is, the optimal beamforming direction of the base station, the narrow beam is used to send the confirmation signal at this time, which is beneficial to improving beamforming efficiency, so as to improve the probability of random access of the terminal.
After the terminal and the base station carry out information interaction of random access, the measurement of the incoming wave direction is more accurate, and the narrow wave beam is adopted to be beneficial to ensuring better link quality during data communication. I.e. after step 23, the method further comprises:
and 24, carrying out data transmission with the terminal by using the narrow beam.
The random access method provided by the second embodiment of the present invention determines the downlink incoming wave direction through the cell synchronization signal, and determines the uplink incoming wave direction through the random access signal, so that the base station and the terminal obtain the optimal beamforming direction during the access process, and then the data transmission between the base station and the terminal can be performed with the optimal (or narrowest) beam a priori, thereby ensuring the performance of the data link; and the random access method has low access time delay in a high frequency band and strong practicability.
Third embodiment
As shown in fig. 4, a third embodiment of the present invention provides an apparatus for random access, including:
a synchronization signal detection module 41, configured to detect a cell synchronization signal sent by a base station, and determine an incoming wave direction of the cell synchronization signal;
a sending direction determining module 42, configured to determine a target sending direction of the random access signal according to an incoming wave direction of the cell synchronization signal;
an access signal sending module 43, configured to send the random access signal in the target sending direction;
a receiving module 44, configured to receive an acknowledgement signal sent by the base station in an incoming wave direction of the random access signal, and access the base station.
Specifically, in the third embodiment of the present invention, the synchronization signal detection module 41 includes:
and the synchronous signal detection submodule is used for detecting the cell synchronous signal sent by the base station by using the wide wave beam and determining the incoming wave direction of the cell synchronous signal.
Specifically, the sending direction determining module 42 in the third embodiment of the present invention includes:
a first sending direction determining submodule, configured to determine, under a time division duplex condition, that an incoming wave direction of the cell synchronization signal is a target sending direction of the random access signal; or,
the second sending direction determining submodule is used for counting the incoming wave directions of the cell synchronizing signals on different frequency bands under the condition of frequency division duplex and determining the target sending directions of the random access signals of the different frequency bands; or,
and the third sending direction determining submodule is used for determining the incoming wave direction of the cell synchronizing signal as the target sending direction of the random access signal under the full duplex condition.
Specifically, the access signal sending module 43 in the third embodiment of the present invention includes:
a first access signal transmitting sub-module for transmitting the random access signal using a wide beam in the target transmitting direction; or,
and the second access signal sending submodule is used for sending the random access signal by using an optimal beam in the direction of the target sending party.
Specifically, in the third embodiment of the present invention, the receiving module 44 includes:
a receiving unit, configured to receive an acknowledgement signal sent by the base station using a narrow beam in an incoming wave direction of the random access signal;
and the access unit is used for confirming the access to the base station according to the confirmation signal.
Specifically, the apparatus in the third embodiment of the present invention further includes:
and the first data transmission module is used for carrying out data transmission with the base station by utilizing narrow beams.
It should be noted that, the apparatus for random access provided in the embodiment of the present invention is an apparatus for random access to which the method for random access provided in the first embodiment is applied, and all embodiments of the method for random access provided in the first embodiment are applicable to the apparatus for random access provided in the third embodiment, and can achieve the same or similar beneficial effects.
Fourth embodiment
A fourth embodiment of the present invention provides an apparatus for random access, including: a processor; and the memory is connected with the processor through a bus interface, the memory is used for storing programs and data used by the processor in executing operation, and when the processor calls and executes the programs and data stored in the memory, the following functional modules are realized:
the synchronous signal detection module is used for detecting a cell synchronous signal sent by a base station and determining the incoming wave direction of the cell synchronous signal;
a sending direction determining module, configured to determine a target sending direction of a random access signal according to an incoming wave direction of the cell synchronization signal;
an access signal sending module, configured to send the random access signal in the target sending direction;
and the receiving module is used for receiving the confirmation signal sent by the base station in the incoming wave direction of the random access signal and accessing the base station.
It should be noted that, the apparatus for random access provided in the embodiment of the present invention is an apparatus for random access to which the method for random access provided in the first embodiment is applied, and all embodiments of the method for random access provided in the first embodiment are applicable to the apparatus for random access provided in the fourth embodiment, and can achieve the same or similar beneficial effects.
Fifth embodiment
As shown in fig. 5, a fifth embodiment of the present invention provides an apparatus for random access, including:
a first transmitting module 51, configured to transmit a cell synchronization signal;
a detecting module 52, configured to detect a random access signal sent by a target sending party of a random access signal backwards in a direction of the target sending party, based on an incoming wave direction of the cell synchronization signal, and determine the incoming wave direction of the random access signal;
a second sending module 53, configured to send an acknowledgement signal in an incoming wave direction of the random access signal to acknowledge access of the terminal.
Specifically, the first sending module 51 in the fifth embodiment of the present invention includes:
and the first transmission sub-module is used for transmitting the cell synchronization signal by using the wide beam.
Specifically, in the fifth embodiment of the present invention, the second sending module 53 includes:
and the second sending submodule is used for sending an acknowledgement signal by using a narrow beam in the incoming wave direction of the random access signal.
Specifically, the apparatus in the fifth embodiment of the present invention further includes:
and the second data transmission module is used for carrying out data transmission with the terminal by utilizing the narrow beam.
It should be noted that, the apparatus for random access provided in the embodiment of the present invention is an apparatus for random access to which the method for random access provided in the second embodiment is applied, and all embodiments of the method for random access provided in the second embodiment are applicable to the apparatus for random access provided in the fifth embodiment, and can achieve the same or similar beneficial effects.
Sixth embodiment
A sixth embodiment of the present invention provides an apparatus for random access, including: a processor; and the memory is connected with the processor through a bus interface, the memory is used for storing programs and data used by the processor in executing operation, and when the processor calls and executes the programs and data stored in the memory, the following functional modules are realized:
a first sending module, configured to send a cell synchronization signal;
a detection module, configured to detect a random access signal sent by a target sender of a random access signal backwards in a direction of the target sender based on an incoming wave direction of the cell synchronization signal, and determine the incoming wave direction of the random access signal;
and the second sending module is used for sending a confirmation signal in the incoming wave direction of the random access signal to confirm the access of the terminal.
It should be noted that, the apparatus for random access provided in the embodiment of the present invention is an apparatus for random access to which the method for random access provided in the second embodiment is applied, and all embodiments of the method for random access provided in the second embodiment are applicable to the apparatus for random access provided in the sixth embodiment, and can achieve the same or similar beneficial effects.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (20)
1. A method of random access, comprising:
detecting a cell synchronization signal sent by a base station, and determining the incoming wave direction of the cell synchronization signal;
determining a target sending direction of a random access signal according to the incoming wave direction of the cell synchronization signal;
transmitting the random access signal to a base station in the target transmission direction;
receiving an acknowledgement signal sent by the base station in the incoming wave direction of the random access signal, and accessing the base station;
the base station can determine the incoming wave direction of the random access signal according to the detected random access signal.
2. The random access method according to claim 1, wherein the step of detecting a cell synchronization signal transmitted by a base station and determining an incoming wave direction of the cell synchronization signal comprises:
and detecting a cell synchronization signal transmitted by the base station by using the wide wave beam, and determining the incoming wave direction of the cell synchronization signal.
3. The method of claim 1, wherein the step of determining the target transmission direction of the random access signal according to the incoming wave direction of the cell synchronization signal comprises:
under the condition of time division duplex, determining the incoming wave direction of the cell synchronizing signal as the target sending direction of the random access signal; or,
under the condition of frequency division duplex, counting the incoming wave directions of cell synchronous signals on different frequency bands, and determining the target sending directions of random access signals of different frequency bands; or,
and under the full-duplex condition, determining the incoming wave direction of the cell synchronization signal as the target sending direction of the random access signal.
4. The method of random access according to claim 1, wherein the step of transmitting the random access signal in the target transmitting direction comprises:
transmitting the random access signal with a wide beam in the target transmitting direction; or,
and transmitting the random access signal by using an optimal beam in the direction of the target transmitting party.
5. The method for random access according to claim 1, wherein the step of receiving the determination signal transmitted by the base station in the incoming wave direction of the random access signal comprises:
receiving an acknowledgement signal sent by the base station by using a narrow beam in the incoming wave direction of the random access signal;
and confirming the access of the base station according to the confirmation signal.
6. The method for random access according to claim 1, wherein the receiving the acknowledgement signal sent by the base station in the incoming wave direction of the random access signal, and after accessing the base station, the method further comprises:
and carrying out data transmission with the base station by utilizing narrow beams.
7. A method of random access, comprising:
transmitting a cell synchronization signal;
the detection terminal determines a random access signal sent backward by a target sending party of the random access signal in the direction of the target sending party based on the incoming wave direction of the cell synchronization signal, and determines the incoming wave direction of the random access signal;
and sending a confirmation signal to the terminal in the incoming wave direction of the random access signal to confirm the access of the terminal.
8. The method of random access according to claim 7, wherein the step of transmitting the cell synchronization signal comprises:
the cell synchronization signal is transmitted using the wide beam.
9. The method of random access according to claim 7, wherein the step of transmitting the acknowledgement signal in the incoming wave direction of the random access signal comprises:
and transmitting an acknowledgement signal by using a narrow beam in the incoming wave direction of the random access signal.
10. The method of random access according to claim 7, wherein after sending the acknowledgement signal in the incoming wave direction of the random access signal, the method further comprises:
and carrying out data transmission with the terminal by utilizing the narrow beam.
11. An apparatus for random access, comprising:
the synchronous signal detection module is used for detecting a cell synchronous signal sent by a base station and determining the incoming wave direction of the cell synchronous signal;
a sending direction determining module, configured to determine a target sending direction of a random access signal according to an incoming wave direction of the cell synchronization signal;
an access signal sending module, configured to send the random access signal to a base station in the target sending direction;
a receiving module, configured to receive a confirmation signal sent by the base station in an incoming wave direction of the random access signal, and access the base station;
the base station can determine the incoming wave direction of the random access signal according to the detected random access signal.
12. The apparatus for random access according to claim 11, wherein the synchronization signal detection module comprises:
and the synchronous signal detection submodule is used for detecting the cell synchronous signal sent by the base station by using the wide wave beam and determining the incoming wave direction of the cell synchronous signal.
13. The apparatus for random access according to claim 11, wherein the transmission direction determining module comprises:
a first sending direction determining submodule, configured to determine, under a time division duplex condition, that an incoming wave direction of the cell synchronization signal is a target sending direction of the random access signal; or,
the second sending direction determining submodule is used for counting the incoming wave directions of the cell synchronizing signals on different frequency bands under the condition of frequency division duplex and determining the target sending directions of the random access signals of the different frequency bands; or,
and the third sending direction determining submodule is used for determining the incoming wave direction of the cell synchronizing signal as the target sending direction of the random access signal under the full duplex condition.
14. The apparatus for random access according to claim 11, wherein the access signal transmission module comprises:
a first access signal transmitting sub-module for transmitting the random access signal using a wide beam in the target transmitting direction; or,
and the second access signal sending submodule is used for sending the random access signal by using an optimal beam in the direction of the target sending party.
15. The apparatus for random access according to claim 11, wherein the receiving module comprises:
a receiving unit, configured to receive an acknowledgement signal sent by the base station using a narrow beam in an incoming wave direction of the random access signal;
and the access unit is used for confirming the access to the base station according to the confirmation signal.
16. The apparatus for random access according to claim 11, wherein the apparatus further comprises:
and the first data transmission module is used for carrying out data transmission with the base station by utilizing narrow beams.
17. An apparatus for random access, comprising:
a first sending module, configured to send a cell synchronization signal;
a detection module, configured to detect a random access signal sent by a target sender of a random access signal backwards in a direction of the target sender based on an incoming wave direction of the cell synchronization signal, and determine the incoming wave direction of the random access signal;
and the second sending module is used for sending a confirmation signal to the terminal in the incoming wave direction of the random access signal to confirm the access of the terminal.
18. The apparatus for random access according to claim 17, wherein the first sending module comprises:
and the first transmission sub-module is used for transmitting the cell synchronization signal by using the wide beam.
19. The apparatus for random access according to claim 17, wherein the second sending module comprises:
and the second sending submodule is used for sending an acknowledgement signal by using a narrow beam in the incoming wave direction of the random access signal.
20. The apparatus for random access according to claim 17, wherein the apparatus further comprises:
and the second data transmission module is used for carrying out data transmission with the terminal by utilizing the narrow beam.
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| CN108155927B (en) * | 2017-12-06 | 2021-03-19 | 京信通信系统（中国）有限公司 | Communication method and device |
| JP2021510027A (en) * | 2018-01-04 | 2021-04-08 | 富士通株式会社 | Beam failure recovery settings and instructions, equipment and communication systems |
| CN110351856A (en) * | 2018-04-03 | 2019-10-18 | 英特尔公司 | The device and method for determining the wave beam for PDCCH |
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| WO2015140838A1 (en) * | 2014-03-20 | 2015-09-24 | パナソニック株式会社 | Base station, terminal apparatus, and initial connection method |
| WO2015147717A1 (en) * | 2014-03-25 | 2015-10-01 | Telefonaktiebolaget L M Ericsson (Publ) | System and method for beam-based physical random-access |
| CN105122662A (en) * | 2012-12-26 | 2015-12-02 | 三星电子株式会社 | Method and apparatus for random access in communication system with large number of antennas |
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| CN105122662A (en) * | 2012-12-26 | 2015-12-02 | 三星电子株式会社 | Method and apparatus for random access in communication system with large number of antennas |
| WO2015140838A1 (en) * | 2014-03-20 | 2015-09-24 | パナソニック株式会社 | Base station, terminal apparatus, and initial connection method |
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