CN108282902B - Random access method, base station and user equipment - Google Patents

Random access method, base station and user equipment Download PDF

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Publication number
CN108282902B
CN108282902B CN201710010203.2A CN201710010203A CN108282902B CN 108282902 B CN108282902 B CN 108282902B CN 201710010203 A CN201710010203 A CN 201710010203A CN 108282902 B CN108282902 B CN 108282902B
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Prior art keywords
random access
mapping relation
transmitting beam
base station
wireless network
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CN108282902A (en
Inventor
张英杰
喻斌
钱辰
熊琦
付景兴
苏笛
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Priority to CN201710010203.2A priority Critical patent/CN108282902B/en
Priority to PCT/KR2018/000243 priority patent/WO2018128455A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • H04W74/0841—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment
    • H04W74/085—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams

Abstract

The invention provides a random access method, a base station and user equipment. Wherein the method comprises the following steps: the base station receives a preamble sequence sent by user equipment; determining a transmit beam direction with maximum energy based on the preamble sequence; determining an indication mark mapped by the direction of the transmitting beam with the maximum energy according to a preset mapping relation; transmitting a random access response containing the indication identifier to the user equipment; and receiving a signal sent by the user equipment in the transmitting beam direction with the maximum energy. The invention reduces the system overhead in the random access process and greatly improves the performance of the random access process in the 5G communication system.

Description

Random access method, base station and user equipment
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a random access method, a base station, and a user equipment.
Background
With the rapid development of the information industry, especially the growing demand from the mobile internet and internet of things (IoT, internet of things), the future mobile communication technology is challenged unprecedented. As per the international telecommunications union ITU report ITU-R M [ imt. Beyond 2020.Traffic ], it is expected that in 2020, mobile traffic will increase approximately 1000 times as compared to 2010 (4G age), UE (User Equipment) connections will also exceed 170 billions, and the number of connections will be even more dramatic as massive IoT devices gradually penetrate the mobile communication network. To address this unprecedented challenge, the communications industry and academia have developed a wide range of fifth generation mobile communication technology research (5G), oriented in the 2020 s. The framework and overall goals of future 5G have been discussed in ITU report ITU-R M [ imt.vision ], where the requirements expectations, application scenarios and important performance metrics of 5G are specified. For new demands in 5G, ITU report ITU-R M [ imt.future TECHNOLOGY TRENDS ] provides information about technical trends for 5G, aiming at solving significant problems of significant improvement of system throughput, user experience consistency, scalability to support IoT, latency, energy efficiency, cost, network flexibility, support of emerging services, flexible spectrum utilization, etc.
A Random Access (Random Access) procedure is an important step in a wireless communication system for establishing downlink synchronization and uplink synchronization between a UE and a base station, and the base station allocates an ID for identifying a user, etc. to the UE. The performance of initial access and random access directly affects the UE experience. For conventional wireless communication systems, such as LTE and LTE-Advanced, the random access procedure is applied to multiple scenarios, such as initial link establishment, cell handover, uplink re-establishment, RRC connection reestablishment, etc., and is divided into Contention-based random access (content-based Random Access) and non-Contention-based random access (content-free Random Access) according to whether the UE has exclusive preamble sequence resources. In the random access based on competition, each UE selects a preamble sequence from the same preamble sequence resource in the process of attempting to establish uplink, and a plurality of UEs may select the same preamble sequence to send to a base station, so that a conflict resolution mechanism is an important research direction in the random access, and how to reduce the conflict probability and how to quickly resolve the conflict which has occurred is a key index affecting the random access performance.
In general, the contention-based random access procedure is divided into four steps, as shown in fig. 1. Before the random access process starts, the base station sends the configuration information of the random access process to the user, and the user performs the random access process according to the received configuration information. In the first step, the user randomly selects a preamble sequence from the preamble sequence resource pool and sends the preamble sequence to the base station. The base station performs correlation detection on the received signal, thereby identifying the preamble sequence transmitted by the user. In a second step, the base station transmits a random access response (Random Access Response, RAR) to the user, including the random access preamble identifier, a timing advance command determined according to the delay estimate between the user and the base station, a Temporary Cell radio network Temporary identifier (TC-Radio Network Temporary Identifier, TC-RNTI), and time-frequency resources allocated for the next uplink transmission of the user. In a third step, the user sends a third message (Msg 3) to the base station based on the information in the RAR. The Msg3 contains information such as a user terminal identifier and an RRC link request, where the user terminal identifier is unique to a user and is used to resolve a conflict. In the fourth step, the base station sends conflict resolution identification to the user, including the user terminal identification winning in the conflict resolution. After detecting the self-identification, the user upgrades the temporary Cell radio network temporary identification into a Cell radio network temporary identification (Cell-Radio Network Temporary Identifier, C-RNTI), sends an ACK signal to the base station, completes the random access process, and waits for the scheduling of the base station. Otherwise, the user will start a new random access procedure after a delay.
In the second step, the random access response is transmitted on the physical downlink shared channel. In the transmitting process, the base station uses Random Access-Radio Network Temporary Identity (RA-RNTI) to scramble the physical downlink control channel corresponding to the physical downlink shared channel. The random access wireless network temporary identifier corresponds to the time-frequency resource occupied by the preamble sequence detected by the base station one by one. In this case, the user may calculate a corresponding random access radio network temporary identity and use the identity to descramble the physical downlink control channel, thereby further detecting the random access response.
For non-contention based random access procedures, the user may be assigned a preamble sequence since the base station knows the user identity. Thus, the user does not need to randomly select a sequence when transmitting the preamble sequence, but can use the allocated preamble sequence. After detecting the allocated preamble sequence, the base station sends corresponding random access response including information such as timing advance and uplink resource allocation. After receiving the random access response, the user considers that the uplink synchronization is completed and waits for further scheduling of the base station. Thus, the initial access and non-contention based random access procedures only involve two steps: step one, transmitting a preamble sequence; and step two, sending a random access response.
Millimeter wave communication is a key technology that is possible with 5G. By increasing the carrier frequency to the millimeter wave frequency band, the available bandwidth will be greatly increased, and thus the transmission rate of the system can be greatly increased. To combat the high fading, high loss, etc. characteristics of millimeter wave band wireless channels, millimeter wave communication systems typically employ Beamforming (Beamforming) techniques, i.e., by using weighting factors to concentrate the beam energy in a certain direction. When the wireless communication is carried out, the base station and the user search out the optimal beam pair by means of polling and the like, so that the receiving signal-to-noise ratio of the base station side and the user side is maximized. Random access in millimeter wave communication systems is a significant challenge because the direction of the optimal beam pair is not known to the user and base station when the initial link is established.
In order to obtain the transmit beamforming direction of the ue, one possible way is as follows: in the first step of sending the preamble sequence, the user tries to send all possible beams by a traditional polling or differential polling mode, the base station detects the optimal transmitting beam forming direction according to the information such as the received signal strength and the like, and sends the indication of the optimal beam forming direction to the user in the second step of random access response.
In existing schemes, the indicated user transmit beam number, transmit beam index or transmit beam direction offset index is typically sent to the user by means of an explicit indication (Explicit Indication) directly included in the random access response. In this case, the random access response must add additional bits to transmit the indicated beam information based on the existing contents. When the number of the beamforming directions of the user transmitting is larger, the corresponding random access response overhead is obviously increased, and the system performance is reduced. In addition, when the total amount of the transmitting beam directions of different users is different, the number of bits to be added in the random access response corresponding to different users is also different. In this case, if random access responses of different lengths are sent for different users, the signaling overhead will be significantly increased; if random access responses with the same length are sent for different users, although the signaling overhead is not significantly affected, the length of the random access response must be referenced to the user with the largest total transmit beam direction, and the user with the smaller total transmit beam direction is unnecessary, so that the resource overhead will be further increased.
Disclosure of Invention
In view of the above problems, the present invention proposes a random access method, a base station and a user equipment, which solve the problems of increased resource overhead and reduced system performance caused by indicating an optimal beamforming direction in a random access process based on a millimeter wave communication system in the prior art.
According to a first aspect of the present invention, an embodiment of the present invention provides a random access method, including the steps of: the base station receives a preamble sequence sent by user equipment; determining a transmit beam direction with maximum energy based on the preamble sequence; determining an indication mark mapped by the direction of the transmitting beam with the maximum energy according to a preset mapping relation; transmitting a random access response containing the indication identifier to the user equipment; and receiving a signal sent by the user equipment in the transmitting beam direction with the maximum energy.
Preferably, the indication identifier is a random access wireless network temporary identifier; the step of sending the random access response containing the indication identifier to the user equipment comprises the following steps: scrambling a downlink control channel by using the random access wireless network temporary identifier, and sending a random access response to the user equipment through a downlink shared channel corresponding to the downlink control channel.
Preferably, the step of receiving, by the base station, a preamble sequence sent by the user equipment includes: the base station receives a preamble sequence sent by the user equipment based on a single antenna port or a multi-antenna port.
Preferably, when the base station receives a preamble sequence sent by the user equipment based on a single antenna port, the preset mapping relationship is a mapping relationship between a transmitting beam direction, a random access channel occupation time and a random access channel occupation frequency and the random access wireless network temporary identifier; the step of determining the indication mark mapped by the transmitting beam direction with the maximum energy according to the preset mapping relation comprises the following steps: and determining the random access wireless network temporary identifier mapped by the maximum energy transmitting beam direction, the random access channel occupation time and the random access channel occupation frequency according to the mapping relation.
Preferably, when the base station receives a preamble sequence sent by the user equipment based on the multi-antenna port, the preset mapping relationship is a mapping relationship between a transmitting beam direction, a transmitting beam direction deviation and a random access channel occupying time-frequency resource and the random access wireless network temporary identifier; the step of determining the indication mark mapped by the transmitting beam direction with the maximum energy according to the preset mapping relation comprises the following steps: and determining the direction of the transmitting beam with the maximum energy, the direction deviation of the transmitting beam with the maximum energy and the random access wireless network temporary identifier mapped by the random access channel occupying time-frequency resource according to the mapping relation.
Preferably, before the step of determining the direction of the transmission beam with the largest energy, the deviation of the direction of the transmission beam with the largest energy, and the temporary identifier of the random access wireless network mapped by the random access channel occupying time-frequency resources according to the mapping relationship, the method further includes: and determining the maximum energy transmitting beam direction deviation based on the corresponding sum beam sequence correlation detection result and the differential beam sequence correlation detection result of the preamble sequence.
Preferably, the preset mapping relationship is a mapping relationship between a random access channel time resource used by a transmitting beam direction and a random access channel frequency resource and a temporary identifier of the random access wireless network; the step of determining the indication mark mapped by the transmitting beam direction with the maximum energy according to the preset mapping relation comprises the following steps: and determining the random access channel time resource used by the transmitting beam direction with the maximum energy and the random access wireless network temporary identifier mapped by the random access channel frequency resource according to the mapping relation.
Preferably, the indication identifier is a cell radio network temporary identifier; the step of sending the random access response containing the indication identifier to the user equipment comprises the following steps: determining a cell in which the user equipment is located, selecting an unused cell radio network temporary identifier from a cell radio network temporary identifier subset of the cell, and sending a random access response containing the selected cell radio network temporary identifier to the user equipment.
Preferably, the step of receiving, by the base station, a preamble sequence sent by the user equipment includes: the base station receives a preamble sequence sent by the user equipment based on a single antenna port or a multi-antenna port.
Preferably, the preset mapping relationship is a mapping relationship between a transmitting beam direction and the cell wireless network temporary identifier; the step of determining the indication mark mapped by the transmitting beam direction with the maximum energy according to the preset mapping relation comprises the following steps: determining a cell wireless network temporary identifier mapped by the transmitting beam direction with the maximum energy according to the mapping relation; or the preset mapping relation is the mapping relation between the direction of the transmitting beam and the temporary identifier of the cell wireless network and the deviation of the direction of the transmitting beam; the step of determining the indication mark mapped by the transmitting beam direction with the maximum energy according to the preset mapping relation comprises the following steps: and determining the transmitting beam direction with the maximum energy and the cell wireless network temporary identifier mapped by the transmitting beam direction deviation with the maximum energy according to the mapping relation.
Preferably, before the step of receiving the preamble sequence sent by the user equipment, the method further includes: and sending system configuration information to user equipment, wherein the configuration information comprises random access channel configuration information and also comprises a mapping relation between a transmitting beam direction and the indication identifier.
Preferably, the step of determining the direction of the transmission beam with the largest energy based on the preamble sequence includes: an energy-maximum transmit beam direction is determined based on the preamble sequence correlation detection.
According to a second aspect of the present invention, an embodiment of the present invention provides a random access method, including the steps of: the user equipment sends a preamble sequence to a base station; receiving a random access response which is sent by a base station and contains an indication identifier; determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to a preset mapping relation; and transmitting signals to the base station in the transmitting beam direction with the maximum energy.
Preferably, the indication identifier is a random access wireless network temporary identifier; the step of receiving the random access response including the indication identifier sent by the base station includes: and calculating a random access wireless network temporary identifier used for scrambling a downlink control channel, and descrambling the downlink control channel by using the random access wireless network temporary identifier so as to receive the random access response.
Preferably, the step of sending the preamble sequence to the base station by the user equipment includes: the user equipment transmits a preamble sequence to the base station based on a single antenna port or multiple antenna ports.
Preferably, when the ue sends a preamble sequence to the base station based on a single antenna port, the preset mapping relationship is a mapping relationship between a transmit beam direction, a random access channel occupation time, and a random access channel occupation frequency and the temporary identifier of the random access wireless network; the step of determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to the preset mapping relation comprises the following steps: and determining the transmitting beam direction with the maximum energy mapped to the random access wireless network temporary identifier according to the mapping relation.
Preferably, when the ue sends the preamble sequence to the base station based on the multiple antenna ports, the preset mapping relationship is a mapping relationship between a transmit beam direction, a transmit beam direction deviation, and a time-frequency resource occupied by a random access channel and the temporary identifier of the random access wireless network; the step of determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to the preset mapping relation comprises the following steps: and determining the transmitting beam direction with the maximum energy mapped to the random access wireless network temporary identifier according to the mapping relation.
Preferably, the preset mapping relationship is a mapping relationship between a random access channel time resource used by a transmitting beam direction and a random access channel frequency resource and a temporary identifier of the random access wireless network; the step of determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to the preset mapping relation comprises the following steps: and determining the random access channel time resource and the random access channel frequency resource mapped by the random access wireless network temporary identifier according to the mapping relation, and determining the transmitting beam direction with the maximum energy of using the random access channel time resource and the random access channel frequency resource.
Preferably, the indication identifier is a cell radio network temporary identifier.
Preferably, the step of sending the preamble sequence to the base station by the user equipment includes: the user equipment transmits a preamble sequence to the base station based on a single antenna port or multiple antenna ports.
Preferably, the preset mapping relationship is a mapping relationship between a transmitting beam direction and the cell wireless network temporary identifier; the step of determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to the preset mapping relation comprises the following steps: determining the direction of the transmitting beam with the maximum energy mapped to the cell wireless network temporary identifier according to the mapping relation; or the preset mapping relation is the mapping relation between the direction of the transmitting beam and the temporary identifier of the cell wireless network and the deviation of the direction of the transmitting beam; the step of determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to the preset mapping relation comprises the following steps: and determining the transmitting beam direction with the maximum energy mapped to the cell wireless network temporary identifier according to the mapping relation.
Preferably, before the step of sending the preamble sequence to the base station, the ue further includes: and receiving system configuration information sent by a base station, wherein the configuration information comprises random access channel configuration information and also comprises a mapping relation between a transmitting beam direction and the indication mark.
According to a third aspect of the present invention, an embodiment of the present invention provides a base station, including: a first receiving module, configured to receive a preamble sequence sent by a user equipment; a first determining module, configured to determine a transmit beam direction with maximum energy based on the preamble sequence; the second determining module is used for determining an indication mark mapped by the direction of the transmitting beam with the maximum energy according to a preset mapping relation; a first sending module, configured to send a random access response including the indication identifier to a user equipment; and the second receiving module is used for receiving the signal sent by the user equipment in the transmitting beam direction with the maximum energy.
According to a fourth aspect of the present invention, an embodiment of the present invention provides a user equipment, including: a third transmitting module, configured to transmit a preamble sequence to a base station; a third receiving module, configured to receive a random access response including an indication identifier sent by the base station; the third determining module is used for determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to a preset mapping relation; and the fourth transmitting module is used for transmitting signals to the base station in the transmitting beam direction with the maximum energy.
Compared with the prior art, the scheme of the invention has the following advantages:
compared with the traditional random access scheme, the scheme of the embodiment contains the indication mark mapped to the beam forming direction in the random access response, and does not need to add beam information such as a transmitting beam number, a transmitting beam index or a transmitting beam direction deviation, so that more bits are not needed to be added to transmit the indicated beam information, the system overhead is obviously reduced, and the performance of a random access process in a 5G communication system is greatly improved.
Meanwhile, when the total quantity of the transmitting beam directions of different user equipment is different, the random access response corresponding to the different user equipment comprises indication marks, the signaling length of the indication marks is uniform and is not different due to the fact that the total quantity of the transmitting beam directions of the user equipment is different, therefore, signaling cost can be greatly reduced, and the performance of the random access process in the 5G communication system is further improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an initial access and contention-based random access procedure in LTE/LTE-a in the prior art;
fig. 2 is a flow chart of a random access method according to an embodiment of the invention;
FIG. 3 is a diagram of sum and differential beam received energies;
FIG. 4 is a diagram showing the ratio of differential beam to sum beam received signals;
fig. 5 is a transmission structure of an antenna array according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a user equipment specifying a beam direction according to the first embodiment;
fig. 7 is a diagram illustrating a mapping example of a transmission beam direction, a random access channel resource and a random access radio network temporary identifier RA-RNTI according to the first embodiment;
fig. 8 is a schematic diagram of a frame structure corresponding to a single-port beam polling scheme adopted by a user equipment according to an embodiment;
fig. 9 is a schematic diagram of a user equipment designated beam pair direction in the second embodiment;
fig. 10 is a diagram illustrating a mapping example of a transmission beam direction, a deviation of the transmission beam direction, a time-frequency resource of a random access channel and a temporary identifier of a random access wireless network according to the second embodiment;
fig. 11 is a schematic diagram of a frame structure corresponding to a multi-port beam polling scheme adopted by a second user equipment according to an embodiment;
fig. 12 is a flowchart of a base station detecting a preamble sequence and a beam transmission direction deviation according to the second embodiment;
Fig. 13 is an exemplary diagram of a mapping relationship between a transmission beam direction and a transmission beam direction deviation and the cell radio network temporary identifier in the third embodiment;
fig. 14 is a schematic diagram of a frame structure corresponding to a beam polling scheme adopted by a fourth user equipment in the embodiment;
fig. 15 is a diagram illustrating mapping between time-frequency resources of a random access channel and temporary identifiers of a random access wireless network according to the fourth embodiment;
fig. 16 is a flowchart of a random access method according to an embodiment of the present invention;
fig. 17 is a flowchart of a random access method according to an embodiment of the present invention;
fig. 18 is a flowchart of a random access method according to an embodiment of the present invention;
fig. 19 is a flowchart of a random access method according to an embodiment of the present invention;
fig. 20 is a schematic structural diagram of a base station according to an embodiment of the present invention;
fig. 21 is a schematic structural diagram of a ue according to an embodiment of the present invention.
Detailed Description
In order to enable those skilled in the art to better understand the present invention, the following description will make clear and complete descriptions of the technical solutions according to the embodiments of the present invention with reference to the accompanying drawings.
In some of the flows described in the specification and claims of the present invention and in the foregoing figures, a plurality of operations occurring in a particular order are included, but it should be understood that the operations may be performed out of order or performed in parallel, with the order of operations such as 101, 102, etc., being merely used to distinguish between the various operations, the order of the operations themselves not representing any order of execution. In addition, the flows may include more or fewer operations, and the operations may be performed sequentially or in parallel. It should be noted that, the descriptions of "first" and "second" herein are used to distinguish different messages, devices, modules, etc., and do not represent a sequence, and are not limited to the "first" and the "second" being different types.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
Aiming at the problems brought by the 5G communication system in the process of indicating the optimal beam, the invention provides a random access method. The basic principle is that the random access wireless network temporary identifier, the cell wireless network temporary identifier or other parameter identifiers are used for implicitly indicating the transmitting beam forming direction under the condition of not increasing the random access response data quantity.
Fig. 2 is a flowchart of a random access method according to an embodiment of the present invention, which includes the following four steps:
in step one, a base station transmits system configuration information. The configuration information content comprises random access channel configuration information (preamble sequence format, preamble sequence occupy time-frequency resource, etc.), and the mapping relation between the transmitting beam direction and the indication mark. The indication identity may be a random access radio network temporary identity RA-RNTI, a cell radio network temporary identity C-RNTI, or other parameter identity.
In the second step, based on the received random access channel configuration information, the user randomly selects a preamble sequence, and the preamble sequence is sent by adopting a traditional single-port wave beam polling or multi-port wave beam polling mode on corresponding time-frequency resources. After detecting the preamble sequence, the base station can acquire the optimal transmitting beam direction and deviation according to the receiving energy or signal of each beam.
And step three, the base station determines the indication mark mapped by the optimal transmitting beam direction of the user based on the detected optimal transmitting beam direction and deviation of the user and the mapping relation between the transmitting beam direction and the indication mark, and transmits a random access response RAR containing the indication mark. In this case, the ue detects the indication identifier in the random access response based on the time-frequency resource used by the own preamble sequence, and determines the direction of transmit beamforming, i.e. the optimal transmit beam direction, according to the mapping relationship between the transmit beam direction and the indication identifier received in the step one.
In step four, the ue transmits a signal in the direction of transmit beamforming indicated by the base station, and the base station receives the signal. The signal sent by the ue in the direction of transmit beamforming indicated by the base station may specifically be a third message Msg3, where Msg3 includes information for a ue identifier and an RRC link request, where the ue identifier is unique to the ue and is used to resolve the conflict. Then, the base station may send a conflict resolution identifier to the user, including the user terminal identifier that is winning in the conflict resolution. After detecting the winning user terminal identification, the user equipment upgrades the temporary cell radio network temporary identification into a cell radio network temporary identification C-RNTI, and sends an ACK signal to the base station to complete the random access process and wait for the scheduling of the base station. Otherwise, the ue starts a new random access procedure after a delay.
In the first step, the base station may not transmit the mapping relationship between the transmission beam direction and the indication identifier. In this case, in step three, the base station determines an indication identifier based on the detected optimal transmission beam direction and deviation of the user, and based on the random access resource corresponding to the direction, and transmits a random access response RAR including the indication identifier. And then the user equipment detects the indication mark in the random access response based on the time-frequency resource used by the self-polling sending preamble sequence, and determines the corresponding preamble sequence time-frequency resource according to the detected indication mark, thereby finally determining the optimal transmitting beam direction. In step two, the ue may send the preamble sequence by using a single-port beam polling or a multi-port beam polling. If the conventional single-port beam polling is adopted, the transmitting end sequentially transmits single beams in a plurality of preset directions by using a single port, and the base station determines the optimal beam direction of the user according to the received energy. For example, a beamforming coefficient may be written as follows:
wherein M represents the number of antennas at the transmitting end, d represents the antenna interval, lambda represents the wavelength, and theta represents the direction of the beam transmitted by the transmitting end. If multi-port beam polling is adopted, the transmitting end uses two or more different ports to respectively transmit two or more beams on orthogonal resources in a plurality of preset directions, and the transmitted beams have certain correlation, so that the receiving end can obtain deviation estimation of the beams of the transmitting end through signal comparison. For example, a two-port preferred beamforming coefficient may be written as follows:
Wherein, N is an even number, which represents the number of antennas at the transmitting end, d represents the antenna interval, lambda represents the wavelength, and theta represents the direction of the beam transmitted by the transmitting end. From the beamforming coefficients, it can be seen that w sum The conventional beam forming coefficient with the beam direction theta is the same as the example that a single beam is sent by a single port, and is called a sum beam in the invention; and w is dif Middle first half element sum beam w sum The latter half is w sum The opposite number of corresponding elements can be regarded as beam w sum Is provided).
Taking the transmitting end equipped with 8 antennas as an example, fig. 3 shows a diagram of sum beam and differential beam reception energy. It can be seen that the energy distribution of the two beams is not the same although the pointing direction of the beams is the same as that of the differential beam, so the ratio of the received signals of the two beams can be used as the basis for discriminating the deviation from the direction of the central beam.
Fig. 4 is a diagram showing the ratio of the differential beam to the sum beam received signal. As can be seen from the figure, the deviation is in one-to-one correspondence with the received signal ratio within a certain deviation range. In the example shown in fig. 4, the deviation range is about [ -15 °,15 ° ]. If the deviation is within the range, a lookup table can be manufactured according to the received signal ratio and the corresponding deviation, the corresponding deviation is read out from the lookup table according to the received signal ratio, and the receiving end feeds back to the transmitting end for adjusting the direction of the transmitting beam.
The flow shown in fig. 2 is applicable to a contention-based random access procedure. For the non-contention based random access procedure, although the preamble sequence transmitted by the user equipment is allocated by the base station, the optimal transmission beam direction of the user needs to be indicated, so that the differential beam based manner provided by the scheme can still be adopted when the optimal transmission beam direction of the user is indicated.
Embodiment one:
the embodiment will introduce a random access method based on a random access wireless network temporary identifier when a user equipment adopts a single antenna port beam polling transmission mode to transmit a preamble sequence.
As shown in fig. 5, both the base station and the user equipment employ the antenna array-based transmission structure shown in fig. 5. In fig. 5, each link after baseband processing is up-converted and Digital-to-Analog Converter (DAC) and one of the N st An antenna array formed by the antenna units is connected, and each antenna in the antenna array can only adjust the phase. By adjusting the phase, the antenna array can form a beam in a proper direction, and the beam forming of the system is completed.
To ensure beam coverage, the user equipment side has been pre-assigned to point to different beam directions. Fig. 6 is a schematic diagram of a beam direction designated by a user in the present embodiment. In fig. 6, the user uses 4 beams to complete coverage of the space.
In step 1, the base station transmits system configuration information to the ue through downlink control channel, downlink broadcast channel, downlink shared channel or higher layer signaling configuration. The system configuration information comprises random access configuration information and also comprises the mapping relation between the random access radio network temporary identifier RA-RNTI, the transmitting beam direction and the random access channel resource. Wherein, the above mapping relationship may be further expressed as: the transmitting beam direction, the time occupied by the random access channel and the frequency occupied by the random access channel are in one-to-one correspondence with the random access radio network temporary identifier RA-RNTI.
Fig. 7 is a diagram showing an example of mapping of a random access radio network temporary identity RA-RNTI with a transmit beam direction, random access channel resources (PRACH resources). Wherein, the total number of usable time-frequency resources of the random access channel is M (the value range of the resource index is 0.ltoreq.m.ltoreq.M), the total number of transmitting beam directions is B (the value range of the beam index is 0.ltoreq.b < B), the total number of temporary identifications of the random access wireless network is N (the value range of the identification index is 1.ltoreq.n.ltoreq.N), and N.ltoreq.MB is satisfied. In such a mapping, one transmit beam direction corresponds to one or more random access radio network temporary identities, which correspond to different random access channel resources, respectively.
The mapping relation function can be expressed as RA-rnti=f (b id ,t id ,f id )
Wherein b id Index (0.ltoreq.b) representing the direction of the user's transmit beam id <B),t id Index (0.ltoreq.t) indicating time resource occupied by random access channel id <T)，f id Index (0.ltoreq.f) identifying frequency resources occupied by random access channel id <F) The method comprises the steps of carrying out a first treatment on the surface of the The function f can be expressed specifically as
RA-RNTI＝1+b id +Bt id +BTf id
Or alternatively
RA-RNTI＝1+b id +Bf id +BFt id
Or alternatively
RA-RNTI＝1+t id +Tf id +TFb id
Or alternatively
RA-RNTI＝1+t id +Tb id +TBf id
Or alternatively
RA-RNTI＝1+f id +Ft id +FTb id
Or alternatively
RA-RNTI＝1+f id +Fb id +FBt id
In step 2, the ue randomly selects a random access preamble sequence based on the received random access channel configuration information, and sequentially uses corresponding time-frequency resources to transmit the random access preamble sequence by adopting a single-port beam polling manner.
Fig. 8 shows a frame structure corresponding to the single port beam polling scheme in this step, in which the user has 4 beam directions, the user equipment will poll the transmit preamble sequence with a single antenna port in beam direction 0, beam direction 1, beam direction 2 and beam direction 3 in sequence, and the duration of transmission in each direction is μ1.
The base station uses a correlation detection method to detect the preamble sequence, and when the sequence used by the correlation detection is matched with the preamble sequence sent by the user equipment, the base station calculates the energy of the whole preamble sequence. And the base station performs correlation detection on the received preamble sequence and outputs correlation detection results of the preamble sequence in each beam direction respectively. The base station then obtains an optimal transmit beam direction, i.e., a transmit beam direction with the highest energy, based on the maximum value of the correlation detection result.
In step 3, based on the time resource index and the frequency resource index of the random access channel corresponding to the transmitting beam direction detected in step 2 and the transmitting beam index of the user, the base station determines the corresponding random access wireless network temporary identifier by using the mapping relation between the random access wireless network temporary identifier and the beam forming direction and the random access channel resource defined in step 1. And then the base station uses the determined random access wireless network temporary identifier to scramble a downlink control channel and transmits a random access response through a downlink shared channel corresponding to the downlink control channel.
The user equipment detects all possible random access wireless network temporary identifiers based on the random access channel resources and the mapping relation between the random access wireless network temporary identifiers received in the step 1 and the transmitting beam direction as well as the random access channel resources. Based on the detected temporary identifier of the random access wireless network, the user can descramble the downlink control channel and further detect the random access response in the downlink shared channel, and meanwhile, based on the mapping relation, the beam forming direction mapped on the temporary identifier of the random access wireless network, namely, the transmitting beam direction with the maximum energy, can be determined. In the subsequent random access step, the ue will use the transmit beam direction to transmit signals to complete the random access procedure.
Of course, in other embodiments, the system configuration information sent by the base station may only include random access configuration information, and does not include the mapping relationship between the random access radio network temporary identifier RA-RNTI and the transmit beam direction, and the random access channel resources. The mapping relationship may be pre-stored in the base station and the ue, and in step 3, the ue invokes the pre-stored mapping relationship to determine the beamforming direction mapped to the temporary identifier of the random access wireless network.
Embodiment two:
the embodiment will introduce a beam random access method based on a random access wireless network temporary identifier when a user equipment adopts a multi-antenna port beam polling transmission mode to transmit a preamble sequence. The system configuration is similar to that of the embodiment, the base station and the user equipment are both provided with the transmission structure based on the antenna array shown in fig. 5, and the user equipment transmits the preamble sequence by adopting a multi-port differential beam polling mode.
To ensure beam coverage, the user side has pre-assigned multiple spatial directions pointing to different directions and uses one beam pair to complete coverage in each direction. Fig. 9 is a schematic diagram of beam directions designated by the user in this embodiment. In fig. 9, the user uses 4 beam pairs to complete coverage of the space. There is one beam pair in each beam direction.
In step 1, the base station transmits system configuration information to the ue through downlink control channel, downlink broadcast channel, downlink shared channel or higher layer signaling configuration. The system configuration information comprises random access configuration information, and the mapping relation between the random access wireless network temporary identifier and the transmitting beam direction, the deviation of the transmitting beam direction and the random access channel resource. Wherein, the above mapping relationship may be further expressed as: the transmitting beam direction, the deviation of the transmitting beam direction, the random access channel resource and the random access wireless network temporary identifier are in one-to-one correspondence.
Fig. 10 is a diagram showing an example of mapping of a temporary identifier of a random access wireless network to a direction of a transmission beam, a deviation of the direction of the transmission beam, and a time-frequency resource of a random access channel. Wherein, the total number of usable time-frequency resources of the random access channel is M (the value range of the resource index is 0.ltoreq.m.ltoreq.M), the total number of transmitting beam directions is B (the value range of the beam index is 0.ltoreq.b < B), the total number of transmitting beam direction deviation is D (the value range of the deviation index is 0.ltoreq.d < D), the total number of temporary identifications of the random access wireless network is N (the value range of the identification index is 1.ltoreq.n.ltoreq.N), and N.ltoreq.MBD is satisfied. In such a mapping, one transmit beam direction and a deviation of the transmit beam direction correspond to one or more random access radio network temporary identities, which correspond to different random access channel resources, respectively.
The mapping relation can be expressed as a function
RA-RNTI＝g(d id ,b id ,r id )
Wherein d id Index (0.ltoreq.d) representing deviation of the direction of the transmission beam id <D)，b id Index (0.ltoreq.b) indicating direction of transmit beam id <B)，m id Index (0.ltoreq.m) representing time-frequency resource occupied by random access channel id <M) is selected from the group consisting of; the function g can be expressed specifically as
RA-RNTI＝1+d id +Db id +DBm id
Or alternatively
RA-RNTI＝1+d id +Dm id +DMb id
Or alternatively
RA-RNTI＝1+b id +Bd id +BDm id
Or alternatively
RA-RNTI＝1+b id +Bm id +BMd id
Or alternatively
RA-RNTI＝1+m id +Md id +MDb id
Or alternatively
RA-RNTI＝1+m id +Mb id +MBd id ；
In step 2, based on the received random access configuration information, the ue randomly selects a random access preamble sequence, and uses corresponding time-frequency resources to transmit the preamble sequence in sequence by adopting a multi-port differential beam polling manner.
Fig. 11 shows a frame structure corresponding to the multi-port beam polling scheme in this step, in which the user has 4 beam pair directions, the user equipment will transmit a preamble sequence with multi-antenna port polling in beam pair direction 0, beam pair direction 1, beam pair direction 2, and beam pair direction 3 in sequence, and the duration of transmission in each direction is μ2.
The specific ways of the ue transmitting the preamble sequence include the following:
1. the preamble sequence is divided into two parts, the first part is transmitted using sum beams and the second part is transmitted using differential beams.
2. The same preamble sequence is transmitted using different resources. For example, two consecutive time resources are used for transmission of the same preamble sequence. Wherein, the first section of resource use and wave beam are transmitted; the second segment of resources is transmitted using a differential beam.
3. The same or different preamble sequences are transmitted using different antenna arrays. Wherein one part of the antenna arrays uses sum beam transmit preamble sequences and the other part of the antenna arrays uses differential beam transmit preamble sequences. When different antenna arrays are used to transmit the preamble sequences, the sum beam sequence and the differential beam sequence may be transmitted on the same frequency resource using mutually orthogonal codewords, or the sum beam sequence or the differential beam sequence may be transmitted on different frequency resources using orthogonal or non-orthogonal codewords.
As shown in fig. 12, a flow chart of detecting the preamble sequence and the beam transmission direction deviation by the base station is shown. And the base station carries out correlation detection on the received signals and outputs the results of the signal sequences respectively to obtain a correlation detection result of the sum beam sequence and a correlation detection result of the difference beam sequence. Although beam squareThe detection result cannot be determined using a single threshold since the beam characteristics of the sum beam and the differential beam are the same. A preferred mode of determination is: the correlation detection result of the sum beam sequence part and a certain signal sequence is set asThe correlation detection result of the differential beam sequence part and the same signal sequence is +. >Then the sequence is deemed to be detected when one of the following conditions is satisfied: a. and (2)>b./>c./>Wherein eta 1 And eta 2 Respectively a first detection threshold and a second detection threshold, and satisfies eta 1 ≤η 2 . First detection threshold eta 1 And a second detection threshold eta 2 And determining the number of antennas used for beam forming by the user and the user in the transmitting process of the preamble sequence according to factors such as the cell radius, the length of the preamble sequence and the like.
If a certain preamble sequence is detected, a signal ratio is calculated according to a corresponding sum beam sequence correlation detection result and a differential beam sequence correlation detection result of the preamble sequence, and deviation of a user transmitting beam direction is obtained based on a principle of a differential beam scheme. The base station quantifies the bias values that may occur and creates a corresponding look-up table. After detecting the deviation of the transmitted beam, the base station quantifies the deviation and finds the corresponding index from the look-up table. Specifically, if the users transmit the same sequence by using beams in different directions, the base station estimates the received energy, obtains a time slot with the strongest received energy, estimates the deviation of the user transmitting direction on the time slot, and finally obtains the transmitting beam direction with the largest energy and the transmitting beam direction deviation.
In step 3, based on the time-frequency resource index of the random access channel corresponding to the transmission beam direction detected in step 2, and the transmission beam direction index and the transmission beam direction deviation index, the base station determines the corresponding random access wireless network temporary identifier by using the mapping relationship between the random access wireless network temporary identifier and the transmission beam direction, the transmission beam direction deviation and the random access channel resource defined in step 1. The base station then uses the random access wireless network temporary identifier to scramble the downlink control channel and transmits a random access response through a downlink shared channel corresponding to the downlink control channel.
The user equipment detects all possible random access wireless network temporary identifiers based on the random access channel resources and the mapping relation between the random access wireless network temporary identifiers received in the first step and the beam forming direction, the direction deviation and the random access channel resources. Based on the detected random access radio network temporary identity, the user can descramble the downlink control channel and can further detect random access response in the downlink shared channel. Meanwhile, the transmitting beam forming direction, namely the transmitting beam direction with the maximum energy, can be determined according to the mapping relation. In the subsequent random access step, the user equipment transmits signals in the beam direction.
It should be noted that, in the solution proposed in this embodiment, the direction of the transmission beam and the deviation of the direction of the transmission beam are indicated to the user equipment simultaneously by the indication mode based on the temporary identifier of the random access wireless network, and the indication method is also applicable to the case of only indicating the deviation of the direction of the transmission beam.
In this case, the base station needs to establish a mapping relationship between the direction deviation of the transmitting beam and the time-frequency resource occupied by the random access channel and the temporary identifier of the random access wireless network in step 1, send the mapping relationship to the user equipment, and continue to use the mapping relationship in the subsequent step, and the end user equipment determines the direction deviation of the transmitting beam based on the detected temporary identifier of the random access wireless network.
Of course, in other embodiments, the system configuration information sent by the base station may only include random access configuration information, and does not include the mapping relationship between the random access wireless network temporary identifier and the transmitting beam direction, the transmitting beam direction deviation, and the random access channel resource. The mapping relationship may be pre-stored in the base station and the ue, and in step 3, the ue may invoke the pre-stored mapping relationship to determine a beamforming direction mapped to the temporary identifier of the random access wireless network.
Embodiment III:
the embodiment will introduce a beam random access method based on temporary cell wireless network temporary identifier when the user equipment adopts a single antenna port or multiple antenna port beam polling transmission mode. Both the base station and the user equipment are equipped with the antenna array based transmission structure shown in fig. 5. To ensure beam coverage, the user side has been pre-assigned to point to different beam directions.
In step 1, the base station transmits system configuration information to the user through downlink control channel, downlink broadcast channel, downlink shared channel or higher layer signaling configuration. The system configuration information comprises random access configuration information and the mapping relation between the direction of a transmitting beam and the deviation of the direction of the transmitting beam and the temporary identifier of the cell wireless network. The above mapping relationship may be further expressed as: a transmit beam direction and a transmit beam direction offset correspond to one or more misaligned cell radio network temporary identities.
Fig. 13 is an exemplary diagram of a mapping relationship between a transmission beam direction and a transmission beam direction deviation and the cell radio network temporary identifier. Wherein the total number of the directions of the transmitting beams and the deviation of the directions of the transmitting beams is B (the index value range is 0.ltoreq.b < B), the total number of the temporary identifications of the cell wireless network is C (the identification index value range is 1.ltoreq.c.ltoreq.C), and the beam index B corresponds to G b A personal cell radio network temporary identity.
For example, the user equipment uses four beams or beam pairs of different directions for the transmission of the preamble sequence, the set Φ of cell radio network temporary identities is divided into four non-onesSubset of intersections Φ 1 ，Φ 2 ，Φ 3 ，Φ 4 The method comprises the following steps:
Φ 1 UΦ 2 UΦ 3 UΦ 4 ＝Φ
wherein each subset of cell radio network temporary identities corresponds to a transmit beam direction and a transmit beam direction deviation, respectively.
In step 2, based on the received random access configuration information, the ue randomly selects a random access preamble sequence, and sequentially uses corresponding time-frequency resources to transmit the random access preamble sequence by adopting a single-port beam polling or multi-port differential beam polling manner.
The base station uses a correlation detection method to detect the preamble sequence, and when the sequence used for correlation detection is matched with the received preamble sequence, the detection result is equivalent to the energy of the whole preamble sequence. If the user adopts a single-port beam polling mode to send the preamble sequence, the base station carries out correlation detection on the received signals, respectively outputs correlation detection results of each beam transmission direction, and obtains the optimal transmission beam direction of the user according to the maximum value of the correlation detection results. If the user transmits the preamble sequence by using the multiport polling method, the flow shown in fig. 12 is used to detect, that is, the preamble sequence is detected first, the direction of the transmitting beam is determined, and then the direction deviation of the transmitting beam is detected. If the correlation detection results in that no leader sequence is detected, no subsequent steps are performed; if the correlation detection module detects the preamble sequence, beam direction deviation detection is respectively carried out on the detected preamble sequence, namely, the deviation between the receiving direction and the array beam direction is obtained according to the sum beam array correlation detection result and the difference beam array correlation detection result.
In step 3, based on the transmission beam direction and the transmission beam direction deviation detected in step 2, the base station randomly selects an unused cell radio network temporary identifier from the corresponding cell radio network temporary identifier subset by using the mapping relationship between the transmission beam direction and the transmission beam direction deviation defined in step 1 and the cell radio network temporary identifier, and uses the unused cell radio network temporary identifier as the temporary cell radio network temporary identifier and transmits the temporary cell radio network temporary identifier in the random access response.
The user equipment detects the temporary cell radio network temporary identifier in the random access response, and determines the transmitting beam forming direction and the angle deviation thereof based on the transmitting beam direction and the mapping relation between the transmitting beam direction deviation and the cell radio network temporary identifier in the step 1. In a subsequent random access step, the user equipment transmits signals in the transmit beam direction.
Of course, in other embodiments, the system configuration information sent by the base station may include only random access configuration information, and does not include the mapping relationship between the transmission beam direction and the transmission beam direction deviation and the temporary identifier of the cell radio network. The mapping relationship may be pre-stored in the base station and the ue, and in step 3, the ue may invoke the pre-stored mapping relationship to determine the beamforming direction mapped to the temporary identifier of the cell wireless network.
Embodiment four:
the embodiment will introduce a beam random access method based on temporary cell wireless network temporary identifier when the user equipment adopts a single antenna port or multiple antenna port beam polling transmission mode. Both the base station and the user equipment are equipped with the antenna array based transmission structure shown in fig. 5. To ensure beam coverage, the user side has been pre-assigned to point to different beam directions.
In step 1, the base station transmits system configuration information to the ue through downlink control channel, downlink broadcast channel, downlink shared channel or higher layer signaling configuration. The system configuration information includes random access configuration information such as random access preamble sequence format, random access resource configuration, and the like.
In step 2, based on the received random access configuration information, the ue randomly selects a random access preamble sequence, and sequentially uses corresponding time-frequency resources to transmit the random access preamble sequence by adopting a single-port beam polling or multi-port differential beam polling manner.
Fig. 14 shows a frame structure corresponding to the beam polling scheme in this step, in which the user has 4 beam directions, the user equipment will transmit preamble sequences using different random access channel resources in the beam polling manner in beam direction 0, beam direction 1, beam direction 2 and beam direction 3 in sequence, and the duration of transmission in each direction is μ3.
The base station uses a correlation detection method to detect the preamble sequence, and when the sequence used for correlation detection is matched with the received preamble sequence, the detection result is equivalent to the energy of the whole preamble sequence. If the user adopts a single-port beam polling mode to send the preamble sequence, the base station carries out correlation detection on the received signals, respectively outputs correlation detection results of each beam transmission direction, and obtains the optimal transmission beam direction of the user according to the maximum value of the correlation detection results. If the user transmits the preamble sequence by using the multiport polling method, the flow shown in fig. 12 is used to detect, that is, the preamble sequence is detected first, the direction of the transmitting beam is determined, and then the direction deviation of the transmitting beam is detected. If the correlation detection results in that no leader sequence is detected, no subsequent steps are performed; if the correlation detection module detects the preamble sequence, beam direction deviation detection is respectively carried out on the detected preamble sequence, namely, the deviation between the receiving direction and the array beam direction is obtained according to the sum beam array correlation detection result and the difference beam array correlation detection result.
In step 3, based on the time resource index and the frequency resource index of the random access channel corresponding to the transmission beam direction detected in step 2, the base station determines the random access wireless network temporary identifier by using a preset mapping relationship between the random access wireless network temporary identifier and the random access channel resource. Wherein, the above mapping relationship may be further expressed as: the time occupied by the random access channel and the frequency occupied by the random access channel are in one-to-one correspondence with the temporary identifier of the random access wireless network.
Fig. 15 is a diagram showing an example of mapping of a random access radio network temporary identity RA-RNTI and a random access channel resource (PRACH resource). Wherein, the total number of usable time-frequency resources of the random access channel is M (the value range of the resource index is 0.ltoreq.m.ltoreq.M), the total number of temporary identifiers of the random access wireless network is N (the value range of the identifier index is 1.ltoreq.n.ltoreq.N), and N.ltoreq.MB is satisfied.
The mapping relation can be expressed as RA-rnti=f (t id ,f id )
Wherein t is id Index (0.ltoreq.t) indicating time resource occupied by random access channel id <T)，f id Index (0.ltoreq.f) indicating frequency resource occupation of random access channel id <F) The method comprises the steps of carrying out a first treatment on the surface of the The function f can be expressed specifically as
RA-RNTI＝1+t id +Tf id
Or alternatively
RA-RNTI＝1+f id +Ft id
And then the base station uses the determined random access wireless network temporary identifier to scramble a downlink control channel and transmits a random access response through a downlink shared channel corresponding to the downlink control channel.
The user equipment detects all possible random access wireless network temporary identifiers based on the random access channel resources used by the beam polling in the step and the mapping relation between the random access wireless network temporary identifiers and the random access channel resources. Based on the detected random access radio network temporary identity, the user can descramble the downlink control channel and can further detect random access response in the downlink shared channel. Meanwhile, based on the detected random access wireless network temporary identifier, the user equipment can determine the random access channel resource mapped to the random access wireless network temporary identifier, and determine the beam forming direction corresponding to the preamble sequence transmitted by using the resource, namely, the transmitting beam direction with the maximum energy. In the subsequent random access step, the ue will use the transmit beam direction to transmit signals to complete the random access procedure.
Fifth embodiment:
next, a random access method according to an embodiment of the present invention will be described from the single-sided point of view of a base station, as shown in fig. 16, and includes the following steps:
s101: the base station receives a preamble sequence sent by user equipment;
s102: determining a transmit beam direction with maximum energy based on the preamble sequence;
s103: determining an indication mark mapped by the direction of the transmitting beam with the maximum energy according to a preset mapping relation;
s104: transmitting a random access response containing the indication identifier to the user equipment;
s105: and receiving a signal sent by the user equipment in the transmitting beam direction with the maximum energy.
When the method of the embodiment is applied, the base station and the user equipment agree on the same mapping relation between the transmitting beam direction and the indication identifier, and the mapping relation is pre-stored in the memories of the base station and the user equipment. Before step S101, the base station further transmits system configuration information to the ue through downlink control channel, downlink broadcast channel, downlink shared channel or higher layer signaling configuration, where the system configuration information includes random access configuration information. The preamble sequence received in step S101 is obtained by the ue randomly selecting based on the received random access configuration information.
In step S102, the base station uses the correlation detection method to detect the preamble sequence, and when the sequence used for correlation detection matches the preamble sequence sent by the user equipment, the base station calculates the energy of the entire preamble sequence. And the base station performs correlation detection on the received preamble sequence and outputs correlation detection results of the preamble sequence in each beam direction respectively. The base station then obtains an optimal transmit beam direction, i.e., a transmit beam direction with the highest energy, based on the maximum value of the correlation detection result.
The preamble sequence received by the base station is sent by the user equipment based on single-port beam polling or multi-port beam polling, and the indication identifier can be a cell wireless network temporary identifier, a random access wireless network temporary identifier or other parameter identifiers.
In one embodiment, when the preamble sequence received by the base station is sent by the user equipment based on single-port beam polling, and the indication identifier is a random access wireless network temporary identifier, the mapping relationship is specifically a mapping relationship between a transmitting beam direction, a random access channel occupation time and a random access channel occupation frequency and the random access wireless network temporary identifier. Step S103 is that the base station determines the transmitting beam direction with the maximum energy, the random access channel occupation time and the random access wireless network temporary mark mapped by the random access channel occupation frequency, and uses the determined random access wireless network temporary mark to scramble the downlink control channel, and sends the random access response through the downlink shared channel corresponding to the downlink control channel.
In one embodiment, when the preamble sequence received by the base station is sent by the user equipment based on multi-port beam polling and the indication identifier is a random access wireless network temporary identifier, the mapping relationship is a mapping relationship of a transmitting beam direction, a transmitting beam direction deviation, a random access channel resource and the random access wireless network temporary identifier.
Step S102 may specifically refer to the flowchart of fig. 12 in which the base station detects the preamble sequence and the beam transmission direction deviation. And the base station carries out correlation detection on the received signals and outputs the results of the signal sequences respectively to obtain a correlation detection result of the sum beam sequence and a correlation detection result of the difference beam sequence. Although the beam direction is the same, the beam characteristics of the sum beam and the difference beam are not the same, and therefore the detection result cannot be determined using a single threshold. A preferred mode of determination is: the correlation detection result of the sum beam sequence part and a certain signal sequence is set asThe correlation detection result of the differential beam sequence part and the same signal sequence is +.>Then one of the following conditions is met, the detection is deemed to beSequence: a.b./>c./>wherein eta 1 And eta 2 Respectively a first detection threshold and a second detection threshold, and satisfies eta 1 ≤η 2 . First detection threshold eta 1 And a second detection threshold eta 2 And determining the number of antennas used for beam forming by the user and the user in the transmitting process of the preamble sequence according to factors such as the cell radius, the length of the preamble sequence and the like.
If a certain preamble sequence is detected, a signal ratio is calculated according to a corresponding sum beam sequence correlation detection result and a differential beam sequence correlation detection result of the preamble sequence, and deviation of a user transmitting beam direction is obtained based on a principle of a differential beam scheme. The base station quantifies the bias values that may occur and creates a corresponding look-up table. After detecting the deviation of the transmitted beam, the base station quantifies the deviation and finds the corresponding index from the look-up table. Specifically, if the users transmit the same sequence by using beams in different directions, the base station estimates the received energy, obtains a time slot with the strongest received energy, estimates the deviation of the user transmitting direction on the time slot, and finally obtains the transmitting beam direction with the largest energy and the transmitting beam direction deviation.
Step S103 is that the base station determines the transmitting beam direction with the maximum energy, the transmitting beam direction deviation and the random access wireless network temporary mark mapped by the random access channel resource according to the mapping relation, and uses the random access wireless network temporary mark to scramble the downlink control channel, and sends the random access response through the downlink shared channel corresponding to the downlink control channel.
In one embodiment, when the preamble sequence received by the base station is sent by the user equipment based on single-port beam polling or multi-port beam polling, and the indication identifier is a cell radio network temporary identifier, the mapping relationship is a mapping relationship between a transmitting beam direction and a transmitting beam direction deviation and the cell radio network temporary identifier.
The specific process of step S102 is as follows, the base station uses the correlation detection method to detect the preamble sequence, and when the sequence used for correlation detection matches with the received preamble sequence, the detection result is equivalent to the energy of the entire preamble sequence calculated. If the user equipment adopts a single-port beam polling mode to send the preamble sequence, the base station carries out correlation detection on the received signals, respectively outputs correlation detection results of each beam transmission direction, and obtains the optimal transmission beam direction of the user according to the maximum value of the correlation detection results. If the ue transmits the preamble sequence in the multiport polling manner, the flow shown in fig. 12 is used to detect, that is, the preamble sequence is detected first, the direction of the transmit beam is determined, and then the direction deviation of the transmit beam is detected. If the correlation detection results in that no leader sequence is detected, no subsequent steps are performed; if the correlation detection module detects the preamble sequence, beam direction deviation detection is respectively carried out on the detected preamble sequence, namely, the deviation between the receiving direction and the array beam direction is obtained according to the sum beam array correlation detection result and the difference beam array correlation detection result.
After determining the transmitting beam direction with the maximum energy and the transmitting beam direction deviation, determining the cell wireless network temporary identifier mapped by the transmitting beam direction with the maximum energy and the transmitting beam direction deviation, randomly selecting an unused cell wireless network temporary identifier from the corresponding cell wireless network temporary identifier subset to be used as a temporary cell wireless network temporary identifier, and transmitting the temporary cell wireless network temporary identifier in a random access response.
Example six:
corresponding to the fifth embodiment, the present embodiment will explain a random access method according to the embodiment of the present invention from the single-side perspective of the ue, as shown in fig. 17, which includes the following steps:
s201: the user equipment sends a preamble sequence to a base station;
s202: receiving a random access response which is sent by a base station and contains an indication identifier;
s203: determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to a preset mapping relation;
s204: and transmitting signals to the base station in the transmitting beam direction with the maximum energy.
When the method of the embodiment is applied, the base station and the user equipment agree on the same mapping relation between the transmitting beam direction and the indication identifier, and the mapping relation is pre-stored in the memories of the base station and the user equipment.
Before step S201, the ue further receives system configuration information configured by the base station through a downlink control channel, a downlink broadcast channel, a downlink shared channel, or higher layer signaling, where the system configuration information includes random access configuration information. According to the random access configuration information, the user equipment randomly selects a random access preamble sequence and sends the random access preamble sequence to the base station.
In step S203, the ue determines an indication identifier included in the random access response, and determines, according to a pre-stored mapping relationship, a direction of an emission beam with maximum energy mapped to the indication identifier, so that in step S204, a signal is sent to the base station in the direction of the emission beam with maximum energy, thereby completing the random access procedure.
The user equipment sends a preamble sequence based on a single-port wave beam polling mode or a multi-port wave beam polling mode, and the indication identifier can be a cell wireless network temporary identifier, a random access wireless network temporary identifier or other parameter identifiers.
In one embodiment, the ue sends the preamble sequence based on a single-port beam polling method, and when the indication identifier is a random access wireless network temporary identifier, the mapping relationship is specifically a mapping relationship between a transmit beam direction, a random access channel occupation time, and a random access channel occupation frequency and the random access wireless network temporary identifier.
The specific process of step S202 is as follows: the user equipment detects all possible random access wireless network temporary identifiers based on the random access channel resources and the mapping relation between the pre-stored random access wireless network temporary identifiers, the transmitting beam direction and the random access channel resources. Based on the detected random access radio network temporary identity, the user can descramble the downlink control channel and can further detect random access response in the downlink shared channel.
In step S203, the ue determines the transmission beam direction with the maximum energy mapped to the indication identifier based on the random access channel resource and the pre-stored mapping relationship between the random access radio network temporary identifier and the transmission beam direction, and the random access channel resource, so that in step S204, signals are sent to the base station in the transmission beam direction with the maximum energy.
In one embodiment, the ue sends the preamble sequence based on a multi-port beam polling method, and when the indication identifier is a random access wireless network temporary identifier, the mapping relationship is a mapping relationship between a transmit beam direction, a transmit beam direction deviation, a random access channel resource and the random access wireless network temporary identifier.
The specific ways of the ue transmitting the preamble sequence include the following:
1. the preamble sequence is divided into two parts, the first part is transmitted using sum beams and the second part is transmitted using differential beams.
2. The same preamble sequence is transmitted using different resources. For example, two consecutive time resources are used for transmission of the same preamble sequence. Wherein, the first section of resource use and wave beam are transmitted; the second segment of resources is transmitted using a differential beam.
3. The same or different preamble sequences are transmitted using different antenna arrays. Wherein one part of the antenna arrays uses sum beam transmit preamble sequences and the other part of the antenna arrays uses differential beam transmit preamble sequences. When different antenna arrays are used to transmit the preamble sequences, the sum beam sequence and the differential beam sequence may be transmitted on the same frequency resource using mutually orthogonal codewords, or the sum beam sequence or the differential beam sequence may be transmitted on different frequency resources using orthogonal or non-orthogonal codewords.
The specific process of step S202 is as follows: the user equipment detects all possible random access wireless network temporary identifiers based on the random access channel resources, the pre-stored transmitting beam directions, the transmitting beam direction deviation and the mapping relation between the random access channel resources and the random access wireless network temporary identifiers. Based on the detected random access radio network temporary identity, the downlink control channel can be descrambled, and the random access response can be further detected in the downlink shared channel.
In step S203, the ue determines the transmission beam direction with the largest energy mapped to the indication identifier based on the random access channel resource and the mapping relationship between the random access radio network temporary identifier received in step S1 and the transmission beam direction, and the random access channel resource, so that in step S204, signals are sent to the base station in the transmission beam direction with the largest energy.
In one embodiment, when the preamble sequence is sent by the ue based on a single-port beam polling or a multi-port beam polling method and the indication identifier is a cell radio network temporary identifier, the mapping relationship is a mapping relationship between a transmission beam direction and a transmission beam direction deviation and the cell radio network temporary identifier.
In step S201, the ue uses four beams or beam pairs with different directions to perform transmission of the preamble sequence, and the specific manner of using multi-port transmission includes the following steps:
1. the preamble sequence is divided into two parts, the first part is transmitted using sum beams and the second part is transmitted using differential beams.
2. The same preamble sequence is transmitted using different resources. For example, two consecutive time resources are used for transmission of the same preamble sequence. Wherein, the first section of resource use and wave beam are transmitted; the second segment of resources is transmitted using a differential beam.
3. The same or different preamble sequences are transmitted using different antenna arrays. Wherein one part of the antenna arrays uses sum beam transmit preamble sequences and the other part of the antenna arrays uses differential beam transmit preamble sequences. When different antenna arrays are used to transmit the preamble sequences, the sum beam sequence and the differential beam sequence may be transmitted on the same frequency resource using mutually orthogonal codewords, or the sum beam sequence or the differential beam sequence may be transmitted on different frequency resources using orthogonal or non-orthogonal codewords.
In step S203, the ue detects the temporary cell radio network temporary identifier in the random access response, and determines the transmit beam forming direction and its angular deviation based on the pre-stored transmit beam direction and the mapping relationship between the transmit beam direction deviation and the cell radio network temporary identifier. In step S204 and subsequent random access steps, the ue transmits signals in the transmit beam direction.
Embodiment seven:
the embodiment will explain a random access method according to the embodiment of the present invention from the single-side perspective of a base station, as shown in fig. 18, which includes the following steps:
S301: the base station sends system configuration information to user equipment, wherein the configuration information comprises random access channel configuration information and also comprises a mapping relation between a transmitting beam direction and an indication mark;
s302: receiving a preamble sequence sent by user equipment based on the random access channel configuration information;
s303: determining a transmit beam direction with maximum energy based on the preamble sequence;
s304: determining an indication mark mapped by the transmitting beam direction with the maximum energy according to the mapping relation;
s305: transmitting a random access response containing the indication identifier to the user equipment;
s306: and receiving a signal sent by the user equipment in the transmitting beam direction with the maximum energy.
Compared with the fifth embodiment, the user equipment and the base station in the present embodiment do not agree on a mapping relationship between the transmission beam direction and the indication identifier, the base station establishes in advance a mapping relationship between the transmission beam direction and the indication identifier, and includes the mapping relationship in the system configuration information, and in step S301, the system configuration information is sent to the user equipment, and the user equipment determines, based on the mapping relationship sent in step S301, the transmission beam direction with the maximum energy mapped to the indication identifier.
The preamble sequence received by the base station is sent by the user equipment based on single-port beam polling or multi-port beam polling, and the indication identifier can be a cell wireless network temporary identifier, a random access wireless network temporary identifier or other parameter identifiers.
Example eight:
corresponding to embodiment seven, this embodiment will explain a random access method according to an embodiment of the present invention from the perspective of a single side of a ue, as shown in fig. 19, which includes the following steps:
s401: the user equipment receives system configuration information sent by a base station, wherein the configuration information comprises random access channel configuration information and also comprises a mapping relation between a transmitting beam direction and an indication mark;
s402: transmitting a preamble sequence to a base station based on random access channel configuration information;
s403: receiving a random access response which is sent by a base station and contains an indication identifier;
s404: determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to the mapping relation;
s405: and transmitting signals to the base station in the transmitting beam direction with the maximum energy.
Compared with the sixth embodiment, the user equipment and the base station in this embodiment do not agree on the mapping relationship between the transmission beam direction and the indication identifier. In step S401, after receiving the system configuration information, the ue extracts a mapping relationship between a transmit beam direction and an indication identifier from the system configuration information. And in step S404, the direction of the transmission beam with the largest energy mapped to the indication mark is determined according to the mapping relation.
Wherein the preamble sequence is sent by the user equipment based on single-port beam polling or multi-port beam polling, and the indication identifier can be a cell wireless network temporary identifier, a random access wireless network temporary identifier or other parameter identifiers.
Example nine:
the present embodiment provides a base station, as shown in fig. 20, which includes: a first receiving module 501, configured to receive a preamble sequence sent by a user equipment; a first determining module 502, configured to determine a transmit beam direction with maximum energy based on the preamble sequence; a second determining module 503, configured to determine, according to a preset mapping relationship, an indication identifier mapped by the direction of the transmission beam with the maximum energy; a first sending module 504, configured to send a random access response including the indication identifier to the user equipment; a second receiving module 505, configured to receive a signal sent by the user equipment in the direction of the transmission beam with the largest energy.
Example ten:
the present embodiment provides a user equipment, as shown in fig. 21, including: a third transmitting module 601, configured to transmit a preamble sequence to a base station; a third receiving module 602, configured to receive a random access response including an indication identifier sent by a base station; a third determining module 603, configured to determine, according to a preset mapping relationship, a direction of an emission beam with the largest energy mapped to the indication identifier; a fourth transmitting module 604, configured to transmit a signal to the base station in the direction of the transmission beam with the maximum energy.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be implemented by a program to instruct related hardware, the program may be stored in a computer readable storage medium, and the storage medium may include: read Only Memory (ROM), random access Memory (RAM, random Access Memory), magnetic or optical disk, and the like.
The foregoing describes a mobile terminal provided by the present invention in detail, and those skilled in the art will appreciate that the present invention is not limited to the specific embodiments and application ranges given by way of illustration.

Claims (46)

1. A random access method, comprising the steps of:
the base station receives a preamble sequence sent by user equipment;
Determining a transmit beam direction with maximum energy based on the preamble sequence;
determining an indication mark mapped by the direction of the transmitting beam with the maximum energy according to a preset mapping relation;
transmitting a random access response containing the indication identifier to the user equipment;
and receiving a signal sent by the user equipment in the transmitting beam direction with the maximum energy.
2. The method according to claim 1, characterized in that:
the indication mark is a random access wireless network temporary mark;
the step of sending the random access response containing the indication identifier to the user equipment comprises the following steps:
scrambling a downlink control channel by using the random access wireless network temporary identifier, and sending a random access response to the user equipment through a downlink shared channel corresponding to the downlink control channel.
3. The method according to claim 2, characterized in that:
the step of receiving the preamble sequence sent by the user equipment by the base station includes:
the base station receives a preamble sequence sent by the user equipment based on a single antenna port or a multi-antenna port.
4. A method according to claim 3, characterized in that:
when the base station receives a preamble sequence sent by user equipment based on a single antenna port, the preset mapping relation is a mapping relation of a transmitting beam direction, a random access channel occupation time and a random access channel occupation frequency and a random access wireless network temporary identifier;
The step of determining the indication mark mapped by the transmitting beam direction with the maximum energy according to the preset mapping relation comprises the following steps:
and determining the random access wireless network temporary identifier mapped by the maximum energy transmitting beam direction, the random access channel occupation time and the random access channel occupation frequency according to the mapping relation.
5. A method according to claim 3, characterized in that:
when the base station receives a preamble sequence sent by the user equipment based on the multi-antenna port, the preset mapping relation is the mapping relation of the transmitting beam direction, the transmitting beam direction deviation and the time-frequency resource occupied by the random access channel and the temporary identifier of the random access wireless network;
the step of determining the indication mark mapped by the transmitting beam direction with the maximum energy according to the preset mapping relation comprises the following steps:
and determining the direction of the transmitting beam with the maximum energy, the direction deviation of the transmitting beam with the maximum energy and the random access wireless network temporary identifier mapped by the random access channel occupying time-frequency resource according to the mapping relation.
6. The method according to claim 5, wherein:
before the step of determining the maximum energy transmitting beam direction, the maximum energy transmitting beam direction deviation and the random access wireless network temporary identifier mapped by the random access channel occupied time-frequency resource according to the mapping relation, the method further comprises the following steps:
And determining the maximum energy transmitting beam direction deviation based on the corresponding sum beam sequence correlation detection result and the differential beam sequence correlation detection result of the preamble sequence.
7. A method according to claim 3, characterized in that:
the preset mapping relation is the mapping relation between the random access channel time resource used by the transmitting beam direction and the random access channel frequency resource and the random access wireless network temporary identifier;
the step of determining the indication mark mapped by the transmitting beam direction with the maximum energy according to the preset mapping relation comprises the following steps: and determining the random access channel time resource used by the transmitting beam direction with the maximum energy and the random access wireless network temporary identifier mapped by the random access channel frequency resource according to the mapping relation.
8. The method according to claim 1, characterized in that:
the indication mark is a cell wireless network temporary mark;
the step of sending the random access response containing the indication identifier to the user equipment comprises the following steps:
determining a cell in which the user equipment is located, selecting an unused cell radio network temporary identifier from a cell radio network temporary identifier subset of the cell, and sending a random access response containing the selected cell radio network temporary identifier to the user equipment.
9. The method according to claim 8, wherein:
the step of receiving the preamble sequence sent by the user equipment by the base station includes:
the base station receives a preamble sequence sent by the user equipment based on a single antenna port or a multi-antenna port.
10. The method according to claim 9, wherein:
the preset mapping relation is the mapping relation between the transmitting beam direction and the cell wireless network temporary identifier;
the step of determining the indication mark mapped by the transmitting beam direction with the maximum energy according to the preset mapping relation comprises the following steps: determining a cell wireless network temporary identifier mapped by the transmitting beam direction with the maximum energy according to the mapping relation;
or the preset mapping relation is the mapping relation between the direction of the transmitting beam and the temporary identifier of the cell wireless network and the deviation of the direction of the transmitting beam;
the step of determining the indication mark mapped by the transmitting beam direction with the maximum energy according to the preset mapping relation comprises the following steps: and determining the transmitting beam direction with the maximum energy and the cell wireless network temporary identifier mapped by the transmitting beam direction deviation with the maximum energy according to the mapping relation.
11. The method according to claim 1, characterized in that:
before the step of receiving the preamble sequence sent by the user equipment, the method further comprises:
and sending system configuration information to user equipment, wherein the configuration information comprises random access channel configuration information and also comprises a mapping relation between a transmitting beam direction and the indication identifier.
12. The method according to claim 1, characterized in that:
the step of determining the direction of the transmission beam with the largest energy based on the preamble sequence comprises the following steps:
an energy-maximum transmit beam direction is determined based on the preamble sequence correlation detection.
13. A random access method, comprising the steps of:
the user equipment sends a preamble sequence to a base station;
receiving a random access response which is sent by a base station and contains an indication identifier;
determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to a preset mapping relation;
and transmitting signals to the base station in the transmitting beam direction with the maximum energy.
14. The method according to claim 13, wherein:
the indication mark is a random access wireless network temporary mark;
the step of receiving the random access response including the indication identifier sent by the base station includes:
And calculating a random access wireless network temporary identifier used for scrambling a downlink control channel, and descrambling the downlink control channel by using the random access wireless network temporary identifier so as to receive the random access response.
15. The method according to claim 14, wherein:
the step of the user equipment transmitting the preamble sequence to the base station includes:
the user equipment transmits a preamble sequence to the base station based on a single antenna port or multiple antenna ports.
16. The method according to claim 15, wherein:
when the user equipment sends a preamble sequence to the base station based on a single antenna port, the preset mapping relation is the mapping relation of the transmitting beam direction, the random access channel occupation time and the random access channel occupation frequency and the random access wireless network temporary identifier;
the step of determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to the preset mapping relation comprises the following steps:
and determining the transmitting beam direction with the maximum energy mapped to the random access wireless network temporary identifier according to the mapping relation.
17. The method according to claim 15, wherein:
when the user equipment sends a preamble sequence to the base station based on the multi-antenna port, the preset mapping relation is the mapping relation of the transmitting beam direction, the transmitting beam direction deviation and the time-frequency resource occupied by the random access channel and the temporary identifier of the random access wireless network;
The step of determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to the preset mapping relation comprises the following steps:
and determining the transmitting beam direction with the maximum energy mapped to the random access wireless network temporary identifier according to the mapping relation.
18. The method according to claim 15, wherein:
the preset mapping relation is the mapping relation between the random access channel time resource used by the transmitting beam direction and the random access channel frequency resource and the random access wireless network temporary identifier;
the step of determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to the preset mapping relation comprises the following steps: and determining the random access channel time resource and the random access channel frequency resource mapped by the random access wireless network temporary identifier according to the mapping relation, and determining the transmitting beam direction with the maximum energy of using the random access channel time resource and the random access channel frequency resource.
19. The method according to claim 13, wherein:
the indication identifier is a cell radio network temporary identifier.
20. The method according to claim 19, wherein:
The step of the user equipment transmitting the preamble sequence to the base station includes:
the user equipment transmits a preamble sequence to the base station based on a single antenna port or multiple antenna ports.
21. The method according to claim 20, wherein:
the preset mapping relation is the mapping relation between the transmitting beam direction and the cell wireless network temporary identifier;
the step of determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to the preset mapping relation comprises the following steps: determining the direction of the transmitting beam with the maximum energy mapped to the cell wireless network temporary identifier according to the mapping relation;
or the preset mapping relation is the mapping relation between the direction of the transmitting beam and the temporary identifier of the cell wireless network and the deviation of the direction of the transmitting beam;
the step of determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to the preset mapping relation comprises the following steps: and determining the transmitting beam direction with the maximum energy mapped to the cell wireless network temporary identifier according to the mapping relation.
22. The method according to claim 13, wherein:
before the step of sending the preamble sequence to the base station, the ue further includes:
And receiving system configuration information sent by a base station, wherein the configuration information comprises random access channel configuration information and also comprises a mapping relation between a transmitting beam direction and the indication mark.
23. A base station, comprising:
a first receiving module, configured to receive a preamble sequence sent by a user equipment;
a first determining module, configured to determine a transmit beam direction with maximum energy based on the preamble sequence;
the second determining module is used for determining an indication mark mapped by the direction of the transmitting beam with the maximum energy according to a preset mapping relation;
a first sending module, configured to send a random access response including the indication identifier to a user equipment;
and the second receiving module is used for receiving the signal sent by the user equipment in the transmitting beam direction with the maximum energy.
24. The base station of claim 23, wherein:
the indication mark is a random access wireless network temporary mark;
the first sending module is used for scrambling a downlink control channel by using the random access wireless network temporary identifier and sending a random access response to the user equipment through a downlink shared channel corresponding to the downlink control channel.
25. The base station of claim 24, wherein: the first receiving module is used for receiving a preamble sequence sent by the user equipment based on a single antenna port or a multi-antenna port.
26. The base station of claim 25, wherein:
when the base station receives a preamble sequence sent by user equipment based on a single antenna port, the preset mapping relation is a mapping relation of a transmitting beam direction, a random access channel occupation time and a random access channel occupation frequency and a random access wireless network temporary identifier;
and the second determining module is used for determining the transmitting beam direction with the maximum energy, the random access channel occupation time and the random access wireless network temporary identifier mapped by the random access channel occupation frequency according to the mapping relation.
27. The base station of claim 25, wherein:
when the base station receives a preamble sequence sent by the user equipment based on the multi-antenna port, the preset mapping relation is the mapping relation of the transmitting beam direction, the transmitting beam direction deviation and the time-frequency resource occupied by the random access channel and the temporary identifier of the random access wireless network;
and the second determining module is used for determining the direction of the transmitting beam with the maximum energy, the direction deviation of the transmitting beam with the maximum energy and the random access wireless network temporary identifier mapped by the random access channel occupying time-frequency resources according to the mapping relation.
28. The base station of claim 27, wherein: the system also comprises a third determining module;
and a third determining module, configured to determine a direction deviation of the transmitting beam with the maximum energy based on the corresponding sum beam sequence correlation detection result and the differential beam sequence correlation detection result of the preamble sequence.
29. The base station of claim 25, wherein:
the preset mapping relation is the mapping relation between the random access channel time resource used by the transmitting beam direction and the random access channel frequency resource and the random access wireless network temporary identifier;
and the second determining module is used for determining the random access channel time resource used by the transmitting beam direction with the maximum energy and the random access wireless network temporary identifier mapped by the random access channel frequency resource according to the mapping relation.
30. The base station of claim 23, wherein:
the indication mark is a cell wireless network temporary mark;
a first sending module, configured to determine a cell in which the ue is located, select an unused cell radio network temporary identifier from a subset of cell radio network temporary identifiers of the cell, and send a random access response including the selected cell radio network temporary identifier to the ue.
31. The base station of claim 30, wherein: and the first receiving module is used for receiving the preamble sequence sent by the user equipment based on the single antenna port or the multi-antenna port.
32. The base station of claim 31, wherein:
the preset mapping relation is the mapping relation between the transmitting beam direction and the cell wireless network temporary identifier;
a second determining module, configured to determine, according to the mapping relationship, a cell radio network temporary identifier mapped by the direction of the transmission beam with the maximum energy;
or the preset mapping relation is the mapping relation between the direction of the transmitting beam and the temporary identifier of the cell wireless network and the deviation of the direction of the transmitting beam;
and the second determining module is used for determining the transmitting beam direction with the maximum energy and the cell wireless network temporary identifier mapped by the transmitting beam direction deviation with the maximum energy according to the mapping relation.
33. The base station of claim 23, wherein: the system also comprises a second sending module;
and the second sending module is used for sending system configuration information to the user equipment, wherein the configuration information comprises random access channel configuration information and also comprises a mapping relation between a transmitting beam direction and the indication identifier.
34. The base station of claim 23, wherein:
and the first determining module is used for determining the transmitting beam direction with the maximum energy based on the correlation detection result of the preamble sequence.
35. A user device, comprising:
a third transmitting module, configured to transmit a preamble sequence to a base station;
a third receiving module, configured to receive a random access response including an indication identifier sent by the base station;
the third determining module is used for determining the direction of the transmitting beam with the maximum energy mapped to the indication mark according to a preset mapping relation;
and the fourth transmitting module is used for transmitting signals to the base station in the transmitting beam direction with the maximum energy.
36. The user equipment of claim 35, wherein:
the indication mark is a random access wireless network temporary mark;
and the third receiving module is used for calculating a random access wireless network temporary identifier used for scrambling a downlink control channel, and descrambling the downlink control channel by using the random access wireless network temporary identifier so as to receive the random access response.
37. The user equipment of claim 36, wherein:
And the third sending module is used for sending the preamble sequence to the base station based on the single antenna port or the multi-antenna port.
38. The user equipment of claim 37, wherein:
when the user equipment sends a preamble sequence to the base station based on a single antenna port, the preset mapping relation is the mapping relation of the transmitting beam direction, the random access channel occupation time and the random access channel occupation frequency and the random access wireless network temporary identifier;
and the third determining module is used for determining the transmitting beam direction with the maximum energy mapped to the random access wireless network temporary identifier according to the mapping relation.
39. The user equipment of claim 37, wherein:
when the user equipment sends a preamble sequence to the base station based on the multi-antenna port, the preset mapping relation is the mapping relation of the transmitting beam direction, the transmitting beam direction deviation and the time-frequency resource occupied by the random access channel and the temporary identifier of the random access wireless network;
and the third determining module is used for determining the transmitting beam direction with the maximum energy mapped to the random access wireless network temporary identifier according to the mapping relation.
40. The user equipment of claim 37, wherein:
the preset mapping relation is the mapping relation between the random access channel time resource used by the transmitting beam direction and the random access channel frequency resource and the random access wireless network temporary identifier;
and the third determining module is used for determining the random access channel time resource and the random access channel frequency resource mapped by the random access wireless network temporary identifier according to the mapping relation, and determining the transmitting beam direction with the maximum energy of using the random access channel time resource and the random access channel frequency resource.
41. The user equipment of claim 35, wherein:
the indication identifier is a cell radio network temporary identifier.
42. The user equipment according to claim 41, wherein:
and the third sending module is used for sending the preamble sequence to the base station based on the single antenna port or the multi-antenna port.
43. The user equipment of claim 42, wherein:
the preset mapping relation is the mapping relation between the transmitting beam direction and the cell wireless network temporary identifier;
a third determining module, configured to determine, according to the mapping relationship, a direction of a transmission beam with maximum energy mapped to the cell radio network temporary identifier;
Or the preset mapping relation is the mapping relation between the direction of the transmitting beam and the temporary identifier of the cell wireless network and the deviation of the direction of the transmitting beam;
and the third determining module is used for determining the transmitting beam direction with the maximum energy mapped to the cell wireless network temporary identifier according to the mapping relation.
44. The user equipment of claim 35, wherein: the method further comprises a fourth receiving module:
and the fourth receiving module is used for receiving system configuration information sent by the base station, wherein the configuration information comprises random access channel configuration information and also comprises a mapping relation between a transmitting beam direction and the indication mark.
45. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any of claims 1-22 when the program is executed by the processor.
46. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a computer program which, when executed by a processor, implements the method of any of claims 1-22.
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