WO2018058408A1

WO2018058408A1 - Random access configuration method and device thereof

Info

Publication number: WO2018058408A1
Application number: PCT/CN2016/100739
Authority: WO
Inventors: 苗金华; 柴丽; 唐珣
Original assignee: 华为技术有限公司
Priority date: 2016-09-29
Filing date: 2016-09-29
Publication date: 2018-04-05
Also published as: CN109661830A; CN109661830B

Abstract

The present invention provides a random access configuration method and an apparatus thereof. The method comprises: a terminal device sets a reception window for at least one random access response message; and the terminal device determines whether a random access response message sent by a network device is received in the reception window for the random access response messages. In the present invention, in a beam scenario, the terminal device sets a reception window for random access response messages, so as to facilitate reception of a random access response message sent by a network device.

Description

Method and device for random access configuration

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and apparatus for random access configuration.

Background technique

In the Long Term Evolution (LTE), random access is classified into two types: contention random access and non-contention random access. As shown in FIG. 1a, a terminal device (Terminal Device) transmits a random access preamble (RAP) to an Evolved Node B (eNB) in an uplink; an eNB to a terminal device Sending a random access response (RAR); the terminal device sends a message 3 (Message3, MSG3) to the eNB; the eNB sends a conflict resolution message 4 (MSG4) to the terminal device, and the terminal device that wins the collision sends an acknowledgement to the eNB ( Acknowledge, ACK). As shown in FIG. 1b, the eNB allocates a random access preamble sequence to the terminal device, and the terminal device sends the preamble allocated by the base station to the eNB; the eNB sends the RAR to the terminal device.

In the above two random access methods, the terminal device needs to monitor whether the physical downlink control channel (PDCCH) has an RAR message replied by the eNB, and the length of the time window for listening to the RAR is the size of the random access message response receiving window ( Ra-ResponseWindowSize) sub-frames.

At present, in the field of high-frequency wireless communication, beamforming technology is used, and network devices and terminal devices transmit data in the manner of Beam. Beam can be sent by time division multiplexing, that is, it is sent only on one or more Beams per unit time, and is sent on another one or more Beams in the next time unit. Since the channel quality on each Beam on the network device and the terminal device is different, it is necessary to perform beam sweeping on the network device and the terminal device to select the best Beam for communication.

However, when the network device and the terminal device perform random access through the Beam, how the terminal device performs the RAR reception window setting becomes an urgent problem to be solved.

Summary of the invention

In order to solve the above problems, the present application provides a method and a device for providing a random access window configuration, the device In the method, the terminal device sets a random access response message receiving window in a scenario in which the terminal device performs random access through the beam.

A first aspect of the present application provides a method for a random access configuration, the method comprising: setting, by a terminal device, a receiving window of at least one random access response message; and determining, by the terminal device, the receiving of the random access response message Whether the random access response message sent by the network device is received in the window.

In a first possible implementation manner of the first aspect, the method further includes: the terminal device transmitting, to the network device, at least one random access preamble sequence; wherein, the receiving of the random access response message The number of windows corresponds to the number of the random access preamble sequences one by one.

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the method further includes: determining, by the terminal device, whether the network device supports a beam receiving manner; The network device supports the manner of receiving the beam, and the terminal device sends the random access preamble sequence to the network device in a beam manner; if the network device does not support the beam receiving mode, the terminal device The network device sends the random access preamble sequence in an omnidirectional manner.

With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the method further includes: determining, by the terminal device, whether the wireless channel is mutually exclusive; If the heterogeneity is present, the terminal device selects a receive beam with a better channel quality, and selects a transmit beam with a better channel quality according to the receive beam, and sends the random access preamble sequence on a good transmit beam of the channel. And if the wireless channel does not have an anisotropy, the terminal device sends the random access preamble sequence on multiple transmit beams.

In conjunction with the first or second possible implementation of the first aspect, in a fourth possible implementation manner of the first aspect, the terminal device sends the at least one random connection to the network device on the at least one transmit beam And entering a preamble sequence; wherein, the number of the random access preamble sequences is in one-to-one correspondence with the number of the transmit beams.

With reference to the first aspect, or the first or second possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the receiving, by the terminal device, the receiving window of the at least one random access response message includes:

When the random access preamble sequence is multiple, the terminal device sets a receiving window of a random access response message after each time sending the random access preamble sequence, so that the terminal device is in the random access. And receiving, in the receiving window of the response message, a random access response message sent by the network device, where the listening time of the random access response message receiving window is an initial listening time.

Combining the first aspect or the first or second possible implementation of the first aspect, the sixth possible implementation in the first aspect In the mode, the receiving, by the terminal device, the receiving window of the at least one random access response message includes: after the terminal device sends the first random access preamble sequence on the transmit beam, setting a random access response message to receive a window, so that the terminal device receives a random access response message sent by the network device in a receiving window of the random access response message, where a size of a receiving window of the random access response message is sent based on The number of beams of the random access preamble sequence is determined by one or two of the number of random access preamble sequences.

With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, a size of a receiving window of the random access response message is based on a number of beams that send the random access preamble sequence, where One or two determinations of the number of random access preamble sequences, specifically: the receiving window size is T=t1+(N-1)t2; wherein, t1 is the listening time of the initially set random access message response receiving window And t2 is a time interval at which the terminal device sends a preamble sequence by using a beam, where N is a number of beams that send the random access preamble sequence, or a number of the random access preamble sequence is sent.

With reference to the first aspect or the first or second possible implementation manner of the first aspect, in the eighth possible implementation manner of the first aspect, the method further includes: when the terminal device is in the random access response When the message receiving window does not receive the random access response message sent by the network device, the terminal device increases the value of the preamble transmission counter by one;

The terminal device sets an initial value of the preamble sequence transmission counter to 1, and when the value of the preamble sequence transmission counter reaches a maximum random access attempt number value, the terminal device stops sending to the network device. The random access preamble sequence.

With reference to the eighth possible implementation manner of the first aspect, in a ninth possible implementation manner of the first aspect, the method further includes: when the value of the preamble sequence transmission counter is greater than 1, the terminal device is rolled back After the time t3, the random access preamble sequence is sent to the network device, where 1≤t3≤BI, BI is the maximum backoff time, and the maximum backoff time is carried in the random access response message.

With reference to the ninth possible implementation manner of the first aspect, in a tenth possible implementation manner of the first aspect, the method includes the following steps: the terminal device sends the same random access preamble sequence on all the beams; The terminal device adds the terminal device identifier to the sent random access preamble sequence; the terminal device sends the same random access preamble sequence on the same time-frequency resource to prevent the network device from going to the terminal The device sends a repeated random access response message.

In an eleventh possible implementation manner of the first aspect, the one random access response message includes at least one time An advance amount, and/or at least one wireless network temporary identifier; wherein the value of the timing advance is determined by a time when the random access preamble sequence arrives at the network device; the number of time advances, or The number of the temporary identifiers of the wireless network is in one-to-one correspondence with the number of the random access preamble sequences.

A second aspect of the present application provides a method for random access configuration, the method comprising: determining, by a network device, at least one receiving window, one of the receiving windows is configured to send a random access response message to a terminal device; The device sends the random access response message to the terminal device in at least one receiving window.

The third aspect of the present application provides a device for a random access configuration, where the device includes a processing unit, where the processing unit is configured to set a receiving window of at least one random access response message; And determining whether a random access response message sent by the network device is received in the receiving window of the random access response message.

A fourth aspect of the present application provides an apparatus for a random access configuration, where the apparatus includes a processing unit and a sending unit, where the processing unit is configured to determine at least one receiving window, and one of the receiving windows is used for the terminal The device sends a random access response message, and the sending unit is configured to send the random access response message to the terminal device in the at least one receiving window.

A fifth aspect of the present application provides a physical device for configuring a random access window, including a processor, a memory, and a communication interface, wherein the memory is configured to store computer instructions, and the communication interface is configured to communicate with an external device, where the processing Used to execute the computer instructions; the processor executes the following instructions:

Setting a receiving window of at least one random access response message;

Determining whether a random access response message sent by the network device is received in the receiving window of the random access response message.

A sixth aspect of the present application provides a physical device for configuring a random access window, including a communication module, a processor, and a memory; wherein the communication unit is configured to communicate with an external device, the memory is configured to store computer instructions, and the processor is configured to: Executing the computer instructions; the processor executing the following instructions:

Determining at least one receiving window, one of the receiving windows for transmitting a random access response message to the terminal device;

The network device sends the random access response message to the terminal device in at least one receiving window.

The application sets a receiving window for the terminal device to perform a random access response message, so that the network device and/or the terminal device can use the receiving window.

DRAWINGS

FIG. 1a is a schematic diagram of signaling of a contention random access procedure provided by the prior art;

FIG. 1b is a schematic diagram of signaling of a non-contention random access procedure provided by the prior art;

2a is a schematic diagram of a random access scenario in a beam scenario provided by the prior art;

2b is a schematic diagram of a random access scenario in another beam scenario provided by the prior art;

2c is a schematic diagram of a random access scenario in another beam scenario provided by the prior art;

FIG. 3 is a schematic flowchart of a method for random access configuration according to an embodiment of the present disclosure;

4a is a schematic diagram of a random access configuration structure according to an embodiment of the present invention;

4b is a schematic diagram of still another random access configuration structure according to an embodiment of the present invention;

4c is a schematic diagram of still another random access configuration structure according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a random access configuration apparatus according to an embodiment of the present disclosure;

FIG. 6 is a schematic flowchart of still another random access configuration method according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of still another random access configuration apparatus according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of a physical device of a random access configuration according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of another physical device in a random access configuration according to an embodiment of the present invention.

detailed description

The terms used in the embodiments of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the invention. The singular forms "a", "the" and "the" It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. It should also be understood that "first" and "second" in this context are also intended to distinguish technical terms from the description, and are convenient for the reader to understand, and should not be construed as limiting the technical terms.

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments.

A radio access node (RAN) related to an embodiment of the present invention is deployed in A device in a wireless access network for providing wireless communication functions to a terminal device. The wireless network access device may include various forms of macro wireless network access devices, micro wireless network access devices, relay stations, access points, and the like. In a system using different wireless access technologies, the name of a device having a wireless network access device function may be different, for example, in an LTE network, called an evolved Node B (eNB or eNodeB), In the fifth generation 5G or NR network, it is called a New Radio NodeB (NR-NB) and the like. For convenience of description, the terminal devices in the embodiments of the present invention are collectively referred to as terminal devices, and the devices that provide wireless communication functions for the terminal devices are collectively referred to as network devices.

In the implementation of the present invention, the terminal device may be a terminal device having a function of installing an application software, such as a mobile phone, a tablet computer, a palmtop computer, or a personal digital assistant (PDA), and is not limited thereto.

A wave beam is a shape in which electromagnetic waves emitted from a transmitting antenna are formed in space; a receiving beam is a shape formed by electromagnetic waves of a receiving antenna. The beam is a directional gain to the signal, so the principle of transmitting the beam and receiving the beam is similar. The beam is transmitted by time division multiplexing or frequency division multiplexing or space division multiplexing, or any combination of the three.

2a-2c are schematic diagrams of three random access scenarios in a beam scenario in the prior art. Since the channel quality of the network device and the terminal device on each Beam is different, the network device and the terminal device select the best Beam to communicate by Beam sweeping, or select the best Beam. Communicate. In Figures 2a-2c, the black beam is the beam that sends or receives the message.

As shown in FIG. 2a, in the first step, the terminal device sends a (Transmit, TX) preamble sequence Preamble to the network device through multiple beam Beams, and the preamble sequence is transmitted in an uplink random access channel (RACH). The network device needs to receive (Receive, RX) multiple Beams. Because the channel quality of different Beams is different, the network device can only receive the Preamble sent by the terminal device on a limited number of Beams. The network device can label the best one or more Beams so that the network device is ready to receive data next time. In the second step, the network device replies to the RAR to the terminal device. Since the network device does not know the receiving signal of the Beam of the terminal device is the best. Therefore, the network device needs to send a random access response RAR in all the beams. If no optimization is used, the terminal device does not know which downlink (DL) Beam has better reception quality, so the terminal device needs to receive at all the cameras. In the third step, if the RAR does not carry the best information about the uplink (Uplink, UL) receiving the Beam of the network device, the terminal device needs to send the third message in all the Beams. Msg3. For a network device, the network device can receive msg3 on the best beam (Best UL RX Beam) because it has already learned which uplink UL reception Beam received the best quality information when receiving the Preamble. In the fourth step, the network device is in the second step when selecting the Beam transmission. Since the terminal device knows the best DL receiving Beam when receiving the RAR, the Msg4 can be received at the best DL of the DL.

As shown in FIG. 2b, in the first step, the terminal device sends the Preamble to the network device through multiple Beams. The network device needs to receive multiple Beams continuously. The channel quality of different cameras can only receive the Preamble sent by the terminal device on a limited number of Beams. The network device can label the best one or more Beams so that the network device is ready to receive data next time. In the second step, the network device replies to the RAR to the terminal device. Since the network device does not know which Beam receiving signal of the terminal device is the best. So the network device needs to send RARs in all Beams. At the same time, the RAR can carry the network device to receive the best Beam information in the Preamble, so that the terminal device can use when sending the message. DL Sync Message or Broadcast Message is sent by Beam. The terminal will scan multiple times and then find out which signal on Beam is the best, so that it receives the synchronization or broadcast message. Get the best information to receive Beam, so the terminal device can receive it in the optimal Beam. The DL synchronization or broadcast message includes a UL grant message (UL grant), a location message (Tracking Area, TA), a random access preamble sequence identifier (RAPID), and a time/frequency information (Time/Freq Info of Preamble) of the preamble sequence. In the third step, because the RAR carries the best information about the UL receiving Beam of the network device, the terminal device can receive the Beam transmitted by the corresponding terminal device according to the best time-frequency information of the receiving device of the network device, that is, The best communication quality of the terminal when the uplink is transmitted. Therefore, the terminal device can transmit Msg3 at the optimal Beam. For network devices, the network device can receive msg3 on the best Beam because it knows which UL receiving Beam has received the best quality information when receiving the Preamble. At the same time, the terminal device knows the best downlink receiving Beam, and can derive the best downlink transmitting Beam of the network device according to the received time-frequency information, and the best downlink transmitting beam identifier (Best DL TX Beam ID) ) is sent to the network device so that the network device can send information for use. In the fourth step, the network device selects the Beam to transmit the same as the second step. Since the terminal device learns the best DL receiving the Beam when receiving the RAR, the Msg4 can be received at the best MAP of the DL; the network device is at the best. The downlink sends a Beam out to send Msg4.

As shown in FIG. 2c, in the first step, the terminal device sends the Preamble to the network device through multiple Beams, and the terminal device in the Preamble preferably receives the Beam information of the Beam. Network devices need to receive multiple Beams continuously, due to differences The channel quality of the Beam is different, which causes the network device to receive the Preamble sent by the terminal device only on a limited number of Beams. The network device can label the best one or more Beams so that the network device is ready to receive data next time. The terminal device transmits the Best DL TX Beam ID of the network device to the network device. In the second step, the network device replies to the RAR to the terminal device. The network device transmits the RAR message with the best communication quality Beam according to the Best DL TX Beam ID. Since the network device obtains the Beam information that the terminal device preferably receives by the DL through the Preamble information, the network device needs to send the RAR on the optimal Beam of the terminal device. At the same time, the RAR can carry the network device to receive the best Beam information in the Preamble, so that the terminal device can use when sending the message. In the third step, because the RAR carries the best information about the UL receiving Beam of the network device, the terminal device can send the Msg3 in the optimal Beam. For network devices, the network device can receive msg3 on the best Beam because it knows which UL receiving Beam has received the best quality information when receiving the Preamble. In the fourth step, the network device is in the second step when selecting the Beam transmission. Since the terminal device knows the best DL receiving Beam when receiving the RAR, the Msg4 can be received at the best DL of the DL.

It should be noted that the terminal device or the network device has one or more beams for sending and receiving messages. The implementation of the present invention does not limit the number of beams of the terminal device or the network device.

In the above-mentioned Beam scenario, the terminal device starts the contention resolution timer immediately after sending the MSG3 message, and then restarts the timer every time the MSG3 is retransmitted, and the terminal device needs to listen in time. The Contention Resolution message returned by the network device, MSG4. If the terminal device receives the conflict resolution message returned by the network device in the mac-Contention Resolution Timer, and the terminal device identifier carried in the conflict resolution message matches the terminal device sent to the network device in the MSG3, the terminal device wins In this random access collision, the random access is successful, and the temporary cell radio network temporary identifier (cell-Radio Network Temporary Identity) obtained in the RAR message is set as the C-RNTI.

For the above-mentioned beam scenario, how the terminal device sets the receiving window of the random access response message, and the following uses FIG. 3 as an example to describe the embodiment of the present invention. FIG. 3 is a schematic flowchart of a method for providing a random access window configuration according to an embodiment of the present invention.

It should be noted that the receiving window of the random access response message may be set by the terminal device, or may be sent by the network device to the terminal device by using a message indicating the parameters of the receiving window.

As shown in FIG. 3, the method includes steps S301-S302:

S301. The terminal device sets a receiving window of at least one random access response message.

Before the step, the terminal device sends at least one random access preamble sequence to the network device, and the number of the receiving windows of the random access response message is in one-to-one correspondence with the number of the random access preamble sequences. And the terminal device sends the at least one random access preamble sequence to the network device on the at least one transmit beam, where the number of the random access preamble sequences is in one-to-one correspondence with the number of the transmit beams.

The terminal device transmits the random access preamble sequence Preamble through one or more beams, and the random preamble sequences on each beam may be the same or different. However, when the terminal device sends multiple Preambles, the network device may receive one or more Preambles at the same time, and the number of Preambles received by the network device depends on the receiving quality of the uplink beams of the network devices. When the network device receives multiple Preambles, if the network device replies to the random access response message RAR for each Preamble, the network device may send multiple RARs to the same terminal device, which may cause greater redundancy. Therefore, the network device needs to distinguish which Preambles are sent by the same terminal device.

Therefore, the terminal device sends the same random access preamble sequence on all the beams; or the terminal device adds the terminal device identifier to the sent random access preamble sequence; or the terminal device is in the same time-frequency resource. Sending the same preamble sequence, for example, in the same subframe number, such as the Nth subframe of each subframe, or in the same frequency domain location, such as in the Mth Physical Resource Block (PRB) After receiving and identifying the preamble sequence sent by the terminal device, the network device only needs to send a random access response message to the terminal device, so that the network device does not send the repeated random access response message to the same terminal device.

S302. The terminal device determines whether a random access response message sent by the network device is received in a receiving window of the random access response message.

In an example, when the random access preamble sequence is multiple, the terminal device sets a receiving window of a random access response message, the random access response message, after each sending a random access preamble sequence. The listening time of the receiving window is the initial listening time. As shown in FIG. 4a, the terminal device 41 is a time when the overall physical uplink random access channel (PRACH) is transmitted, and 42 is a time when the terminal device transmits other data. 45 is the total length of the overall PRACH window time, 43 is a PRACH for transmitting a Preamble in one beam, and 44a is a random access response message receiving window in one beam. Each beam maintains an RAR receive window for receiving RAR messages sent by the network device.

In another example, the terminal device sets a random access after transmitting the first random access preamble sequence. And responding to the receiving window of the message, so that the terminal device receives the random response message sent by the network device in the receiving window of the random access response message. The size of the receiving window is determined by one or two of the number of beams transmitting the random access preamble sequence and the number of random access preamble sequences. For example, the size of the receiving window is T=t1+(N-1)*t2. T1 is the listening time of the initially set random access message response receiving window, that is, the size of the random access response receiving window, and t2 is the time interval at which the terminal device sends the preamble sequence through the beam, where N is the terminal device. The number of preamble sequences is transmitted by the beam, or the number of beams of the random access preamble sequence is transmitted. As shown in FIG. 4b, 44b is the listening time of the initially set random access message response receiving window, and 46 is the expanded RAR receiving window time. For example, at time T1, the terminal device sends premble1 on Beam1, and T2 sends Preamble2 on Beam2, T2=T1+X, and X is the time interval for Beam1 and Beam2 to send Preamble. Preamble1 and Preamble2 can be the same. The terminal device starts to listen to the random access response message after T1+K, and K is the time interval from the start of the Preamble to the start of listening to the random access response message. The length of the listening operation is T=t1+1*X, t1 is The listening time of the initial RAR receiving window is notified by the network device to the terminal device through a broadcast message or a radio resource control dedicated signaling.

In another example, after transmitting the first random access preamble sequence, the terminal device sets a receiving window of the random access response message; after the terminal device continues to send the random access preamble sequence to the network device, The terminal device restarts the clock of the random access response message receiving window, and re-clocks from the start time of sending the random access preamble sequence; wherein the listening time of the random access response message receiving window is initial Ra-Response Window Size. For example, as shown in FIG. 4c, Beam1 sends Preamble1, Beam2 sends Preamble2, 44c is the initial listening time of Preamble1, and the listening time window of Preamble1 is [T1+K, T1+M], and the listening time window of Preamble2 Is [T2+K, T2+M]. When the terminal device starts listening for Preamble1, T1+K momentarily turns on the clock, but when it runs to T2+K time, it restarts the clock and starts timing again from T2+K. That is, the terminal device will always hear the end of the T2+M time, instead of ending at the T1+M time. In the above example, when the random access response message receiving window on all the beams of the terminal device does not receive the random access response message sent by the network device, and the terminal device fails to access the random access, the terminal device The value of the preamble sequence transmission counter (Preamble_Transimission_Counter) is incremented by one; the terminal device sets the initial value of the preamble sequence transmission counter to 1, and when the value of the preamble sequence transmission counter reaches the maximum random access attempt number (Preamble TransMax) value, The terminal device stops transmitting a random access preamble sequence to the network device.

In another example, after the terminal device sends multiple Preambles to the network device, the RAR listening window is opened. The receive window size is obtained by a broadcast message, and/or a radio resource control message. For example, after the terminal device sends 5 Preambles to the network device, an RAR listening window is opened.

In addition, the terminal device is provided with a fallback mechanism. After the random access fails, the terminal device does not immediately perform a random access attempt, and randomly generates a random number according to the size of the Boffoff Indicator (BI), and then the terminal. The device retreats according to this random number for a certain period of time, and then performs the process of random access. In the embodiment of the present invention, when the terminal device resends the Preamble to the network device, when the value of the preamble sequence transmission counter is greater than 1, the terminal device may send the random access preamble to the network device after the backoff time t3. sequence. 1 ≤ t3 ≤ BI, BI is the maximum backoff time, and the maximum backoff time is carried in the random access response message.

It should be noted that the time window of the RAR that is set by the system in the prior art is that the subframe is sent by the terminal device + 3 subframes of the Preamble, and the length is Ra-Response Window Size subframes. If there is no RAR that receives a reply from the network device within this time, the access is considered to have failed. If the maximum number of attempts Preamble TransMax has not been reached after the access fails, the terminal device can increase the power to send the Preamble based on the last transmitted power, thereby increasing the probability of successful transmission. In the embodiment of the present invention, the terminal device sets the initial transmit power value of the Preamble according to the Preamble_Transmission_Counter. In the embodiment of the present invention, the initial listening time, that is, the initial window size starts from the terminal device, after the Preamble is sent, +k (k is a natural number greater than or equal to 0) subframes, and the length is Ra-Response Window Size.

In the above method, the method further includes: determining, by the terminal device, whether the network device supports a beam receiving manner before transmitting the random access preamble sequence. If the network device supports the receiving mode of the beam, the terminal device sends the random access preamble sequence to the network device in a beam manner; if the network device does not support the multiple beam receiving mode, Transmitting the random access preamble sequence in a manner that the terminal device sends an omnidirectional antenna to the network device.

It should be noted that the terminal device acquires whether the network device supports beam receiving, and includes the terminal device listening for broadcast messages of the network device, the terminal device acquiring from a configuration message, or switching commands. Beam reception is a capability of a network device. If supported, the terminal device transmits data to the base station in a beam manner, and the network device can receive the data; if not, the terminal device transmits in a non-beam manner. It is an omnidirectional antenna transmission method for transmission.

In the above method, the method further includes: determining, by the terminal device, whether the wireless channel has mutuality before transmitting the random access preamble sequence. If the wireless channel is mutually exclusive, the terminal device selects a receiving beam with a better channel quality, and sends the random access preamble sequence according to the receiving beam to select a transmitting beam with a better channel quality; If the wireless channel does not have an anisotropy, the terminal device transmits the random access preamble sequence on multiple transmit beams.

It should be noted that the mutuality means that the device receiving the data can determine the condition of the transmission channel according to the situation of the receiving channel. The terminal device determines the channel quality of the transmitted Beam according to the channel of the received network device. Similarly, the network device can obtain the quality of the channel of the terminal device according to the quality of the received channel of the terminal device. The terminal device selects the way to send the Preamble according to the mutuality. The method for the terminal device to acquire the network mutuality may be through a frame structure or by broadcasting a message.

In the above method, one of the random access response messages may include at least one timing advance, and/or at least one wireless network temporary identifier. The value of the timing advance is determined by the time when the random access preamble sequence arrives at the network device; the number of the timing advances, or the number of the temporary identifiers of the wireless network, and the random access preamble The number of sequences corresponds one-to-one. It should be noted that each time the terminal device sends a Preamble, if the network device receives the Preamble, it will generate a Time advance (TA) and a Cell Radio Network Temporary Iedentity. When the network device receives multiple Preambles, multiple Preamble random access response messages may be combined into one for transmission. The timing advance needs to be calculated according to the time when the Preamble arrives at the network device, and the temporary identifier of the wireless network is allocated by the network device according to the number of Preambles.

The apparatus for random access configuration according to the embodiment of the present invention will be described below by taking FIG. 5a-5b as an example.

As shown in FIG. 5a, a device for random access configuration includes a sending unit 501, a processing unit 502, and a receiving unit 503.

The processing unit 502 is configured to set a receiving window of the at least one random access response message, and then determine whether a random access response message sent by the network device is received in the receiving window of the random access response message.

The apparatus also includes a transmitting unit 501 that transmits at least one random access preamble sequence to the network device. The number of receiving windows of the random access response message is in one-to-one correspondence with the number of the random access preamble sequences.

In an example, the processing unit 502 determines whether the network device supports a beam receiving mode. If the network device supports a beam receiving mode, the terminal device sends the beam device to the network device in a beam manner. The random access preamble sequence; if the network device does not support the multi-beam receiving mode, the terminal device sends the random access preamble sequence to the network device in an omnidirectional antenna manner.

In an example, the processing unit determines whether the network device has an anisotropy; if the network device has an anisotropy, the terminal device selects a receiving beam with a better channel quality, and selects a channel according to the receiving beam. Quality a better transmit beam, the random access preamble sequence is sent; if the network device does not have an alienation, the terminal device sends the random access preamble sequence on multiple transmit beams.

In an example, the sending unit 501 is further configured to send the same random access preamble sequence on all the beams; or add the terminal device identifier to the sent random access preamble sequence; or The same random access preamble sequence is sent on the time-frequency resource to prevent the network device from sending a repeated random access response message to the terminal device.

In an example, the sending unit sends at least one random access preamble sequence to the network device on at least one transmit beam, where the number of random access preamble sequences corresponds to the number of the transmit beams. .

In an example, when the random access preamble sequence is multiple, the processing unit sets a receiving window of a random access response message each time the terminal device sends a random access preamble sequence; The listening time of the random access response message receiving window is the initial listening time, and the number of receiving windows of the random access response message is the same as the number of the random access preamble sequences.

In another example, after the terminal device sends the first random access preamble sequence, the processing unit sets a receiving window of a random access response message, and the size of the receiving window of the random access response message is sent by The number of beams of the random access preamble sequence is determined by one or two of the number of random access preamble sequences. For example, the size of the receiving window is T=t1+(N-1)*t2; where t1 is the listening time of the initially set random access message response receiving window, and t2 is the terminal device transmitting the preamble sequence through the beam The time interval, where N is the number of preamble sequences transmitted by the terminal device through the beam, or the number of beams transmitting the random access preamble sequence.

In yet another example, after transmitting the first random access preamble sequence, the processing unit sets a receiving window of a random access response message. After the terminal device continues to send the random access preamble sequence to the network device, the terminal device restarts the clock of the random access response message receiving window, and sends the start time of the second random access preamble sequence The re-clocking is started; wherein the listening time of the random access response message receiving window is the initial listening time.

In an example, the processing unit 502 is further configured to: when the terminal device does not receive the random access response message sent by the network device in the random access response message receiving window, the terminal device The value of the sequence transmission counter is incremented by one; wherein the terminal device sets an initial value of the preamble sequence transmission counter to 1, and when the value of the preamble sequence transmission counter reaches a maximum random access attempt number value, the terminal The device stops to the network device Transmitting the random access preamble sequence.

In an example, the processing unit 502 is further configured to: when the value of the preamble sequence transmission counter is greater than 1, the terminal device sends a random access preamble sequence to the network device after the backoff time t3; 1≤t3≤BI, BI is the maximum backoff time.

In the above apparatus, the receiving unit 503 receives a random access response message sent by the network device. One of the random access response messages includes at least one timing advance, and/or at least one invalid network temporary identifier; and the value of the timing advance is determined by a time when the random access preamble sequence arrives at the network device; The number of the timing advances or the number of the temporary identifiers of the wireless network is in one-to-one correspondence with the number of the random access preamble sequences.

Another random access method will be described below using FIG. 6 as an example. FIG. 6 is a schematic flowchart of still another random access configuration method according to an embodiment of the present invention. As shown in FIG. 6, the method includes steps S601-S602.

S601. The network device determines at least one receiving window, and one of the receiving windows is configured to send a random access response message to the terminal device.

In an example, the determining, by the network device, the at least one receiving window includes: when the random access preamble sequence is multiple, the network device sets a random access response message after receiving the random access preamble sequence each time. Receiving a window, so that the network device sends the random access response message to the terminal device in the receiving window; wherein the size of the random access response message receiving window is an initial window size. The initial window size is the Ra-Response Window Size, as in step S302, and is not described here.

In an example, the determining, by the network device, the at least one receiving window includes: after the network device receives the first random access preamble sequence on the receiving beam, setting a receiving window of a random access response message, so as to facilitate a random access response message sent by the network device to the terminal device in a receiving window of the random access response message; wherein a size of a receiving window of the random access response message is based on sending the random access The number of beams entering the preamble sequence, one or two of the number of random access preamble sequences. For example, the size of the receiving window of the random access response message is T=t1+(N-1)t2; where t1 is the size of the initially set random access message response receiving window, and t2 is the terminal device transmitting the preamble through the beam. The time interval of the sequence, where N is the number of beams transmitting the random access preamble sequence, or the number of the random access preamble sequences is transmitted.

S602. The network device sends the random access response message to the terminal device in the at least one receiving window.

In the above method, the method further includes: the network device receiving at least one random sent by the terminal device Access the preamble sequence. And the number of the random access preamble receiving windows is one-to-one corresponding to the number of the random access preamble sequences.

In the above method, the network device receives the random access preamble sequence sent by the terminal device on at least one receiving beam. And the number of the random access preamble sequences is in one-to-one correspondence with the number of the receiving beams.

In the above method, one of the random access response messages includes at least one timing advance, and/or at least one invalid network temporary identifier; wherein, the time when the network device receives the random access preamble sequence determines The value of the timing advance amount; the number of the timing advances, or the number of the wireless network temporary identifiers one-to-one corresponding to the number of the random access preamble sequences.

FIG. 7 is a schematic structural diagram of still another random access configuration apparatus according to an embodiment of the present invention; as shown in FIG. 7, the network device includes a sending unit 701, a processing unit 702, and a receiving unit 703.

The processing unit 702 determines at least one receiving window, and one of the receiving windows is configured to send a random access response message to the terminal device.

The sending unit 701 sends the random access response message to the terminal device in at least one receiving window.

In the foregoing apparatus, the receiving unit 703 receives at least one random access preamble sequence sent by the terminal device; the number of the random access preamble sequence receiving window is one-to-one corresponding to the number of the random access preamble sequences. .

The receiving unit is further configured to receive the random access preamble sequence sent by the terminal device on at least one receiving beam. And the number of the random access preamble sequences is in one-to-one correspondence with the number of the receiving beams.

In an example, the processing unit 702 determines that the at least one receiving window includes: when the random access preamble sequence is multiple, the network device sets a random access response after receiving the random access preamble sequence each time. a receiving window of the message, so that the network device sends the random access response message to the terminal device in the receiving window; wherein the size of the random access response message receiving window is an initial window size.

In an example, the processing unit 702 determines that the at least one receiving window comprises: after the network device receives the first random access preamble sequence on the receiving beam, setting a receiving window of a random access response message, so that a random access response message sent by the network device to the terminal device in a receiving window of the random access response message; wherein a size of a receiving window of the random access response message is based on sending the random The number of beams accessing the preamble sequence, one or two of the number of random access preamble sequences. For example, the processing unit sets the receiving window size to T=t1+(N-1)t2; t1 is the size of the initial setting random access message response receiving window, and t2 is the terminal setting. The time interval at which the preamble sequence is transmitted through the beam, where N is the number of beams transmitting the random access preamble sequence, or the number of the random access preamble sequences is transmitted.

In the above apparatus, the sending unit is configured to send the random access response message to the terminal device, where one of the random access response messages includes at least one timing advance, and/or at least one invalid network temporary And determining, by the network device, the time of the random access preamble sequence, the value of the time advance amount; the number of the time advance quantity, or the number of the wireless network temporary identifier, and the random number The number of access preamble sequences is one-to-one correspondence.

The structure of the terminal entity device in the embodiment of the present invention will be described below by taking FIG. 8-9 as an example. As shown in FIG. 8, the terminal device includes a processor 82 for storing computer instructions, and a communication interface 81 for communicating with an external device, the processor 82 for Executing the computer instructions:

Setting a receiving window of at least one random access response message;

FIG. 9 is a schematic diagram of a physical device of a network device, including a communication module 91, a processor 92, and a memory 93. The communication unit 91 is for communicating with an external device, the memory 93 is for storing computer instructions, the processor 92 is for executing the computer instructions, and the processor executes the following instructions:

In the scenario of a beam, the present invention sets a receiving window for the terminal device to perform a random access response message, so as to receive a random access response message sent by the network device.

A person skilled in the art should further appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

The steps of the method or algorithm described in connection with the embodiments disclosed herein may be implemented by hardware, a software module executed by a processor. Block, or a combination of both, is implemented. The software module can be placed in random access memory (RAM), memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or technical field. Any other form known.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

A method for random access configuration, the method comprising:

The terminal device sets a receiving window of at least one random access response message;

The terminal device determines whether a random access response message sent by the network device is received in the receiving window of the random access response message.
The method according to claim 1, wherein the method further comprises: the terminal device transmitting at least one random access preamble sequence to the network device;

The number of receiving windows of the random access response message is in one-to-one correspondence with the number of the random access preamble sequences.
The method according to claim 2, wherein the method further comprises: the terminal device determining whether the network device supports a manner of receiving a beam;

If the network device supports the receiving mode of the beam, the terminal device sends the random access preamble sequence to the network device in a beam manner;

If the network device does not support the receiving mode of the beam, the terminal device sends the random access preamble sequence to the network device in an omnidirectional manner.
The method according to claim 2, wherein the method further comprises: the terminal device determining whether the wireless channel has mutuality;

If the wireless channel has an anisotropy, the terminal device selects a receiving beam with a better channel quality in the network device, and selects a transmitting beam with a better channel quality according to the receiving beam, and sends the random access preamble sequence;

If the wireless channel does not have an anisotropy, the terminal device transmits the random access preamble sequence on multiple transmit beams.
The method according to claim 2 or 3, wherein the terminal device transmits at least one random access preamble sequence to the network device on at least one transmit beam; wherein the random access preamble sequence The number is in one-to-one correspondence with the number of the transmission beams.
The method according to claim 1 or 2 or 3, wherein the receiving, by the terminal device, the receiving window of the at least one random access response message comprises:

When the random access preamble sequence is multiple, the terminal device sets a receiving window of a random access response message after each time sending the random access preamble sequence, so that the terminal device is in the random access. Response window receiving window And receiving, in the mouth, a random access response message sent by the network device, where the listening time of the random access response message receiving window is an initial listening time.
The method according to claim 1 or 2 or 3, wherein the receiving, by the terminal device, the receiving window of the at least one random access response message comprises:

After the terminal device sends the first random access preamble sequence on the transmit beam, setting a receiving window of the random access response message, so that the terminal device is in the receiving window of the random access response message. Receiving a random access response message sent by the network device;

The size of the receiving window of the random access response message is determined according to the number of beams that send the random access preamble sequence, and one or two of the number of random access preamble sequences are determined.
The method according to claim 7, wherein the size of the receiving window of the random access response message is based on the number of beams transmitting the random access preamble sequence, and one of the number of random access preamble sequences Two determinations, specifically: the receiving window size is T=t1+(N-1)t2;

The t1 is the initial set time of the random access message response receiving window, t2 is the time interval at which the terminal device sends the preamble sequence through the beam, and N is the number of beams transmitting the random access preamble sequence, or Sending the number of random access preamble sequences.
The method according to claim 1 or 2 or 3, wherein the method further comprises:

When the terminal device does not receive the random access response message sent by the network device in the random access response message receiving window, the terminal device increases the value of the preamble transmission counter by one;

The terminal device sets an initial value of the preamble sequence transmission counter to 1, and when the value of the preamble sequence transmission counter reaches a maximum random access attempt number value, the terminal device stops sending to the network device. The random access preamble sequence.
The method of claim 9 wherein the method further comprises:

When the value of the preamble sequence transmission counter is greater than 1, the terminal device sends a random access preamble sequence to the network device after the backoff time t3; wherein, 1≤t3≤BI, BI is the maximum backoff time. .
Method according to claim 2 or 3, characterized in that it comprises one of the following steps:

The terminal device transmits the same random access preamble sequence on all beams;

Transmitting, by the terminal device, the terminal device identifier on the sent random access preamble sequence;

The terminal device sends the same random access preamble sequence on the same time-frequency resource to prevent the network device from sending a repeated random access response message to the terminal device.
The method according to claim 1, wherein one of said random access response messages comprises at least one timing advance, and/or at least one wireless network temporary identifier; wherein

The value of the timing advance is determined by the time when the random access preamble sequence arrives at the network device; the number of the timing advances, or the number of the temporary identifiers of the wireless network, and the random access preamble The number of sequences corresponds one-to-one.
A method for random access configuration, characterized in that the method comprises:

The network device determines at least one receiving window, and one of the receiving windows is configured to send a random access response message to the terminal device;

The network device sends the random access response message to the terminal device in at least one receiving window.
The method according to claim 13, wherein the method further comprises: the network device receiving at least one random access preamble sequence sent by the terminal device;

The number of the random access preamble receiving windows is one-to-one corresponding to the number of the random access preamble sequences.
The method according to claim 14, wherein the network device receives the random access preamble sequence sent by the terminal device on at least one receiving beam;

The number of the random access preamble sequences is in one-to-one correspondence with the number of the received beams.
The method according to claim 13 or 14 or 15, wherein the determining, by the network device, the at least one receiving window comprises:

When the random access preamble sequence is multiple, the network device sets a receiving window of a random access response message after receiving the random access preamble sequence, so that the network device is in the receiving window. Sending the random access response message to the terminal device;

The size of the random access response message receiving window is an initial window size.
The method according to claim 13 or 14 or 15, wherein the determining, by the network device, the at least one receiving window comprises:

After receiving the first random access preamble sequence on the receive beam, the network device sets a receive window of the random access response message, so that the network device is in the receiving window of the random access response message. a random access response message sent to the terminal device;

The size of the receiving window of the random access response message is determined according to the number of beams that send the random access preamble sequence, and one or two of the number of random access preamble sequences are determined.
The method according to claim 17, wherein the size of the receiving window of the random access response message is based on the number of beams transmitting the random access preamble sequence, and one of the number of random access preamble sequences Two determinations, specifically: the receiving window size is T=t1+(N-1)t2;

Wherein t1 is the size of the initially set random access message response receiving window, t2 is the time interval at which the terminal device transmits the preamble sequence through the beam, and N is the number of beams for transmitting the random access preamble sequence, or the sending station The number of random access preamble sequences.
The method according to claim 13, wherein one of said random access response messages comprises at least one timing advance, and/or at least one invalid network temporary identifier; wherein

The time when the network device receives the random access preamble sequence determines a value of the time advance amount; the number of the time advance quantity, or the number of the wireless network temporary identifiers and the random access preamble The number of sequences corresponds one-to-one.
A device for random access configuration, characterized in that the device comprises a processing unit;

The processing unit is configured to set a receiving window of at least one random access response message;

The processing unit is further configured to determine whether a random access response message sent by the network device is received in a receiving window of the random access response message.
The device according to claim 20, wherein said device further comprises a transmitting unit;

The sending unit is configured to send at least one random access preamble sequence to the network device; the number of receiving windows of the random access response message is in one-to-one correspondence with the number of the random access preamble sequences.
The device according to claim 21, wherein the processing unit is further configured to determine whether the network device supports a beam receiving manner;

If the network device supports the receiving mode of the beam, the terminal device sends the random access preamble sequence to the network device in a beam manner;

If the network device does not support the multi-beam receiving mode, the terminal device sends the random access preamble sequence to the network device in an omnidirectional antenna manner.
The device according to claim 21, wherein the processing unit is further configured to determine whether the network device has mutuality;

If the network device is mutually exclusive, the terminal device selects a receiving beam with a better channel quality in the network device, and selects a transmitting beam with a better channel quality according to the receiving beam, and sends the random access preamble sequence;

If the network device does not have an alienation, the terminal device sends the random access preamble sequence on multiple transmit beams.
The apparatus according to claim 20 or 21 or 22, wherein the receiving window of the at least one random access response message by the processing unit comprises:

When the random access preamble sequence is multiple, after the terminal device sends the random access preamble sequence, the processing unit sets a receiving window of the random access response message, so that the terminal device is in the Receiving, in the receiving window of the random access response message, a random access response message sent by the network device, where

The listening time of the random access response message receiving window is an initial listening time.
The apparatus according to claim 20 or 21 or 22, wherein the receiving window of the at least one random access response message by the processing unit comprises:

After the terminal device sends the first random access preamble sequence on the transmit beam, the processing unit sets a receive window of a random access response message, so that the terminal device is in the random access response message. Receiving a random access response message sent by the network device in a receiving window;

The size of the receiving window of the random access response message is determined according to the number of beams that send the random access preamble sequence, and one or two of the number of random access preamble sequences are determined.
The apparatus according to claim 25, wherein the receiving window of the random access response message set by the processing unit is specifically T=t1+(N-1)*t2;

The t1 is the initial set time of the random access message response receiving window, t2 is the time interval at which the terminal device sends the preamble sequence through the beam, and N is the number of beams transmitting the random access preamble sequence, or The number of random access preamble sequences.
The device according to claim 20 or 21 or 22, wherein the processing unit is further configured to:

When the terminal device does not receive the random access response message sent by the network device in the random access response message receiving window, the terminal device increases the value of the preamble transmission counter by one;

The terminal device sets an initial value of the preamble sequence transmission counter to 1, and when the value of the preamble sequence transmission counter reaches a maximum random access attempt number value, the terminal device stops sending to the network device. Said Random access to the preamble sequence.
The device according to claim 27, wherein the processing unit is further configured to:

When the value of the preamble sequence transmission counter is greater than 1, the terminal device sends a random access preamble sequence to the network device after the backoff time t3; wherein, 1≤t3≤BI, BI is the maximum backoff time. .
The device according to claim 21 or 22, wherein the sending unit is further configured to perform one of the following steps:

Transmitting the same random access preamble sequence on all beams;

Adding the terminal device identifier to the sent random access preamble sequence;

Sending the same random access preamble sequence on the same time-frequency resource to prevent the network device from sending a repeated random access response message to the terminal device.
The device according to claim 21 or 22, wherein the sending unit is further configured to:

Transmitting at least one of the random access preamble sequences to the network device on the at least one transmit beam; wherein the number of the random access preamble sequences is in one-to-one correspondence with the number of the transmit beams.
The device according to claim 20, wherein the device further comprises a receiving unit, and receiving a random access response message sent by the network device;

One of the random access response messages includes at least one timing advance, and/or at least one invalid network temporary identifier; and the value of the timing advance is determined by a time when the random access preamble sequence arrives at the network device; The number of the timing advances or the number of the temporary identifiers of the wireless network is in one-to-one correspondence with the number of the random access preamble sequences.
A device for random access configuration, characterized in that the device comprises a processing unit and a sending unit;

The processing unit is configured to determine at least one receiving window, where one of the receiving windows is configured to send a random access response message to the terminal device;

The sending unit is configured to send the random access response message to the terminal device in the at least one receiving window.
The device according to claim 32, wherein said device further comprises a receiving unit;

The receiving unit is configured to receive at least one random access preamble sequence sent by the terminal device; the number of the random access preamble sequence receiving windows is one-to-one corresponding to the number of the random access preamble sequences.
The apparatus according to claim 33, wherein the receiving unit is further configured to receive, on the at least one receiving beam, the random access preamble sequence sent by the terminal device, where

The number of the random access preamble sequences is in one-to-one correspondence with the number of the received beams.
The apparatus according to claim 32 or 33 or 34, wherein the processing unit determines that the at least one receiving window comprises:

When the random access preamble sequence is multiple, the network device sets a receiving window of a random access response message after receiving the random access preamble sequence, so that the network device is in the receiving window. Sending the random access response message to the terminal device;

The size of the random access response message receiving window is an initial window size.
The apparatus according to claim 32 or 33 or 34, wherein the processing unit determines that the at least one receiving window comprises:

After receiving the first random access preamble sequence on the receive beam, the network device sets a receive window of the random access response message, so that the network device is in the receiving window of the random access response message. a random access response message sent to the terminal device;

The size of the receiving window of the random access response message is determined according to the number of beams that send the random access preamble sequence, and one or two of the number of random access preamble sequences are determined.
The apparatus according to claim 36, wherein said processing unit sets a receiving window size of T = t1 + (N - 1) t2;

Wherein t1 is the size of the initially set random access message response receiving window, t2 is the time interval at which the terminal device transmits the preamble sequence through the beam, and N is the number of beams for transmitting the random access preamble sequence, or the sending station The number of random access preamble sequences.
The apparatus according to claim 32, wherein the sending unit is configured to send the random access response message to the terminal device, where

One of the random access response messages includes at least one timing advance, and/or at least one invalid network temporary identifier; and the time when the network device receives the random access preamble sequence determines a value of the timing advance amount; The number of the timing advances or the number of the temporary identifiers of the wireless network is in one-to-one correspondence with the number of the random access preamble sequences.