WO2018227793A1 - Communication method and apparatus - Google Patents

Abstract

Disclosed in the present application are a communication method and apparatus. The method comprises: in a first time T, receiving a response message from a network device; after a delay duration K of the first time T, sending a scheduling message to the network device; K is related to time indication information k1 or K is related to time indication information k1 and k2; k1 is located at the head of a media access control protocol data unit MAC PDU of the RAR, and k2 is located in the load of the MAC PDU. Also disclosed is a corresponding apparatus. The technical solution of the present application can implement scheduling transmission in a multi-beam network by means of flexible configuration of the sending time of the scheduling transmission, saving the overheads of indicating the sending time of the scheduling transmission.

Description

Communication method and device Technical field

The present invention relates to the field of communications technologies, and in particular, to a communication method and apparatus.

Background technique

In a long term evolution (LTE) communication system, a random access (RA) process is shown in FIG. 1. In the case of random access, the terminal device first transmits a random access preamble (sometimes referred to as "msg1") to the network device on the allocated random access resource. A receiving window of a random access response (RAR, sometimes referred to as "msg2") and a timing diagram of the first scheduling, as shown in FIG. 2, the terminal device transmits a preamble therefrom (FIG. 2 The consecutive ra-ResponseWindowSize subframes starting from the third subframe after subframe k) (subframe k+3 in Fig. 2) are the reception windows of the random access response. Within the receiving window, the terminal device receives the random access response until it receives the RAR that matches itself, or until the receiving window ends, the terminal device will not continue to monitor the RAR information. The range of the ra-ResponseWindowSize is 2-10 subframes, that is, the duration of the terminal device continuously monitoring the RAR continuously is 10 ms.

As shown in FIG. 2, in the LTE, if the terminal device detects the RAR that matches itself in the subframe n, the terminal device transmits the scheduled transmission in the first subframe position fixed after the n+k1 subframe (scheduled transmission). , also known as "msg3"), where k1 ≥ 6, k1 is determined by the hardware physical delay and the uplink delay UL-delay field. The UL-delay field is included in an uplink grant grant (UL Grant) field in the payload of a medium access control (MAC) protocol data unit (PDU) (also known as MAC RAR). The UL-delay size is 1 bit and is used to indicate subframe 0, 1, respectively. If the UL-delay is equal to 0, the terminal device will send the first scheduled transmission at the first uplink subframe position after the subframe n+6; if the UL-delay is equal to 1, the terminal device will be after the subframe n+6 The second uplink subframe position sends the first scheduled transmission.

Considering the future wireless communication network, such as new radio (NR), the network device uses multiple transmit beams to achieve full coverage of downlink data transmission, and multiple receive beams are used to achieve full coverage of uplink random access. As shown in the schematic diagram of random access preamble transmission and reception in the multi-beam communication network shown in FIG. 3, there may be multiple random access opportunities in one subframe/slot (RACH occasion/RACH transmission occasion/RACH opportunity/RACH chance) The case of RO, as shown in FIG. 3, includes four ROs, which are RO0 to RO3, respectively. In this way, the terminal device may utilize multiple random access opportunities in the subframe/slot to perform random access, that is, transmit a random access preamble on multiple random access resources. Due to multiple random access resources in one subframe/slot, the network device uses multiple beams in different directions (for example, B1) to respectively receive the random access preamble on the random access resource, and the network device uses the beam to transmit random. When the access response or the network device receives the scheduled transmission, the transmitting or receiving beams of the network device can only reach the same or a limited number in the same subframe/time slot (for example, B2 beams transmit random access response, B3 beam reception scheduling) Request, in general, B3 ≤ B2 ≤ B1) direction of the beam, thus, the number of beams required for scheduling transmission and the number of received random access preambles in one subframe/slot or the random access response The number of beams does not match, so there is greater flexibility in the time required to schedule transmissions. At present, the random access scheme of LTE has a fixed relationship between the time of transmitting msg3 and the time of receiving msg2, which is disadvantageous for flexible configuration of msg3 transmission time in a multi-beam network.

Summary of the invention

The present application provides a communication method and apparatus for solving scheduled transmissions in a multi-beam network to achieve more flexible communication.

An aspect of the present application provides a communication method, including: receiving a response message from a network device at a first time T; transmitting a scheduling transmission to the network device after the delay time K at the first time T; The K is related to the time indication information k1 or K is related to the time indication information k1 and k2; wherein the k1 is located at a head of a medium access control protocol data unit MAC PDU of the response message, the k2 is located at the The load of the MAC PDU.

In a possible implementation manner, before the receiving the response message from the network device at the first time T, the method further includes: acquiring random access configuration information, where the random access configuration information includes: indicating the response message The window length of the window and information indicating the offset time.

In another possible implementation, the receiving, by the first time T, the response message from the network device, specifically: receiving the response according to a start time of the response message window, an offset time, and a window length of the response message window. Message.

In a further possible implementation, the receiving the response message from the network device at the first time T, specifically: receiving the response message according to the start time of the response message window and the window length of the response message window; The start time of the response message window is related to the information indicating the offset time.

In yet another possible implementation, the method further includes: acquiring a start time of the response message window.

In another possible implementation manner, the acquiring the start time of the response message window includes: acquiring index information of the random access resource; and, according to the information indicating the offset time, and the random access resource Index information determining the start time of the response message window.

Accordingly, another aspect of the present application also provides a communication device that can implement the above communication method. For example, the communication device may be a chip (such as a baseband chip, or a communication chip, etc.) or a device (such as a terminal device or the like). The above method can be implemented by software, hardware, or by executing corresponding software by hardware. In a possible implementation, the structure of the communication device includes a processor and a memory; the processor is configured to support the device to perform a corresponding function in the foregoing communication method. The memory is for coupling with a processor that holds the necessary programs (instructions) and/or data for the device. Optionally, the communication device may further include a communication interface for supporting communication between the device and other network elements. .

In another possible implementation manner, the communication device may include a receiving unit and a sending unit. The receiving unit and the transmitting unit are respectively configured to implement the receiving and transmitting functions in the above method. For example, the receiving unit is configured to receive a response message from the network device at a first time T, and the sending unit is configured to send a scheduling transmission to the network device after the delay time K of the first time T.

When the communication device is a chip, the receiving unit may be an input unit such as an input circuit or a communication interface; the transmitting unit may be an output unit such as an output circuit or a communication interface. When the communication device is a device, the receiving unit may be a receiver (which may also be referred to as a receiver); the transmitting unit may be a transmitter (which may also be referred to as a transmitter).

Optionally, the communication device may further include a processing unit, configured to acquire random access configuration information. Optionally, the receiving unit is specifically configured to: receive the response message according to a start time of the response message window, an offset time, and a window length of the response message window.

Optionally, the receiving unit is specifically configured to: receive the response message according to a start time of the response message window and a window length of the response message window.

Optionally, the processing unit is further configured to acquire a start time of the response message window. For example, the processing unit is configured to: obtain index information of the random access resource; and determine, according to the information indicating the offset time and the index information of the random access resource, a start time of the response message window.

In another aspect of the present application, a communication method is provided, comprising: transmitting a response message to a terminal device at a first time T, wherein a header of a Medium Access Control Protocol Data Unit MAC PDU of the response message includes a time indication Information k1; receiving, by the terminal device, a scheduled transmission sent after the delay time K of the first time T, wherein the K and the time The indication information k1 is related.

In a possible implementation manner, the load of the MAC PDU of the response message includes time indication information k2; the K is related to the time indication information k1 and k2.

In another possible implementation manner, the k1, k2 are constant, or the k1, k2 are determined according to at least one parameter, where the at least one parameter includes: bandwidth, subcarrier spacing, frame structure, and service type. .

In a further possible implementation, before the sending the random access response response message to the terminal device at the first time T, the method further includes: generating the random access configuration information, the random access configuration The information includes: a window length indicating a random access response response message window and information indicating an offset time; and the sending the random access configuration information to the terminal device.

Correspondingly, another aspect of the present application further provides a communication apparatus, which can implement the above communication method. For example, the communication device may be a chip (such as a baseband chip, or a communication chip, etc.) or a device (such as a network device, a baseband single board, etc.). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.

In a possible implementation, the structure of the communication device includes a processor and a memory; the processor is configured to support the device to perform a corresponding function in the foregoing communication method. The memory is for coupling with a processor that holds the programs (instructions) and data necessary for the device. Optionally, the communication device may further include a communication interface for supporting communication between the device and other network elements.

In another possible implementation manner, the communication device may include a sending unit and a receiving unit. The receiving unit and the transmitting unit are respectively configured to implement the receiving and transmitting functions in the above method. For example, the sending unit is configured to send a response message to the terminal device at the first time T, where a header of the medium access control protocol data unit MAC PDU of the response message includes time indication information k1, and a receiving unit is configured to receive a scheduled transmission sent by the terminal device after the delay time K of the first time T, wherein the K is related to the time indication information k1; or the sending unit is configured to send a response message to the terminal at the first time T The device, where the header of the media access control protocol data unit MAC PDU of the response message includes time indication information k1, and the load of the MAC PDU includes time indication information k2; the receiving unit is configured to receive the The scheduled transmission sent by the terminal device after the delay time K of the first time T, wherein the K is related to the time indication information k1 and k2.

When the communication device is a chip, the receiving unit may be an input unit such as an input circuit or a communication interface; the transmitting unit may be an output unit such as an output circuit or a communication interface. When the communication device is a device, the receiving unit may be a receiver (which may also be referred to as a receiver); the transmitting unit may be a transmitter (which may also be referred to as a transmitter).

Optionally, the k1 and k2 are constants, or the k1 and k2 are determined according to at least one parameter, where the at least one parameter includes: a bandwidth, a subcarrier spacing, a frame structure, and a service type. Optionally, the communication device further includes a processing unit, configured to generate random access configuration information, where the random access configuration information includes: a window length indicating a response message window and information indicating an offset time; the sending unit And is further configured to send the random access configuration information.

With reference to the above aspects of the present application, in a possible implementation, the k1 is located in a MAC subheader for indicating backoff information; or the k1 is located in an information field of any MAC subheader.

In conjunction with the above aspects of the present application, in another possible implementation, the k2 is located in an uplink grant UL grant field in the payload, and/or the k2 is located in a reserved bit of the load.

In conjunction with the above aspects of the present application, in still another possible implementation, the k1 occupies 1 to 3 bits.

With reference to the foregoing aspects of the present application, in a further possible implementation, the start time of the response message window is a time for sending a random access preamble plus a time of N time units, where N is greater than 1 Integer, where time units are subframes, time slots, minislots, OFDM (orthogonal frequency division multiplexing) Use) the symbol, or absolute time.

In still another aspect of the present application, a communication method is provided, including: acquiring random access configuration information, where the random access configuration information includes: a window length indicating a response message window and information indicating an offset time; The information indicating the offset time and the information indicating the window length of the response message window receive the response message from the network device.

In a possible implementation, the receiving, according to the information indicating the offset time and the information indicating the window length of the response message window, the response message from the network device, specifically: the response according to the response The response message is received by a start time of the message window, the offset time, and a window length of the response message window.

In another possible implementation manner, the start time of the response message window is a time for sending a random access preamble plus a time of N time units, where N is an integer greater than 1, where the time unit is Subframe, time slot, minislot, OFDM symbol, or absolute time.

In another possible implementation manner, the receiving, according to the information indicating the offset time and the information indicating the window length of the response message window, the response message, specifically: the according to the response message The start time of the window and the window length of the response message window are received, and the response message is received; wherein the start time of the response message window is related to the information indicating the offset time.

In yet another possible implementation manner, the method further includes: acquiring a start time of the response message window.

In another possible implementation manner, the acquiring the start time of the response message window includes: acquiring the index information of the random access resource; and the information and the location according to the indication offset time Determining the start time of the response message window by using index information of the random access resource.

Correspondingly, the present application also provides a communication device, which can implement the above communication method. For example, the communication device may be a chip (such as a baseband chip, or a communication chip, etc.) or a transmitting device (such as a terminal device or the like). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.

In a possible implementation, the structure of the communication device includes a processor and a memory; the processor is configured to support the device to perform a corresponding function in the foregoing communication method. The memory is for coupling with a processor that holds the necessary programs (instructions) and/or data for the device. Optionally, the communication device may further include a communication interface for supporting communication between the device and other network elements.

In another possible implementation manner, the communication device may include a processing unit and a receiving unit. The processing unit is configured to acquire random access configuration information, where the random access configuration information includes: a window length indicating a response message window and information indicating an offset time; and the receiving unit is configured to The information of the shift time and the information indicating the window length of the response message window receive a response message from the network device. Optionally, the receiving unit is specifically configured to: receive the response message according to a start time of the response message window, the offset time, and a window length of the response message window. When the communication device is a chip, the receiving unit may be an input unit such as an input circuit or a communication interface. When the communication device is a terminal device, the receiving unit may be a receiver.

Optionally, the start time of the response message window is a time for sending a random access preamble plus a time of N time units, where N is an integer greater than 1, where the time unit is a subframe, a time slot, Microslot, OFDM symbol, or absolute time.

Optionally, the receiving unit is configured to: receive the response message according to a start time of the response message window and a window length of the response message window; wherein, a start time of the response message window is The information indicating the offset time is related.

Optionally, the processing unit is further configured to: acquire a start time of the response message window.

Optionally, the processing unit is specifically configured to: obtain index information of a random access resource; and offset according to the indication The information between the information and the index information of the random access resource determines the start time of the response message window.

In still another aspect of the present application, a communication method is provided, including: generating random access configuration information, where the random access configuration information includes: a window length indicating a response message window and information indicating an offset time; the sending The random access configuration information is sent to the terminal device; and the sending the response message to the terminal device.

Correspondingly, the present application also provides a communication device, which can implement the above communication method. For example, the communication device may be a chip (such as a baseband chip, or a communication chip, etc.) or a transmitting device (such as a network device, a baseband single board, etc.). The above method can be implemented by software, hardware, or by executing corresponding software by hardware.

In a possible implementation, the structure of the communication device includes a processor and a memory; the processor is configured to support the device to perform a corresponding function in the foregoing communication method. The memory is for coupling with a processor that holds the necessary programs (instructions) and/or data for the device. Optionally, the communication device may further include a communication interface for supporting communication between the device and other network elements.

In another possible implementation manner, the communication device may include a processing unit and a sending unit. The processing unit is configured to generate random access configuration information, where the random access configuration information includes: a window length indicating a response message window and information indicating an offset time; the sending unit is configured to send the random access configuration The information is sent to the terminal device; and the sending unit is configured to send the response message to the terminal device. When the communication device is a chip, the transmitting unit may be an output unit such as an output circuit or a communication interface; when the communication device is a device, the transmitting unit may be a transmitter or a transmitter.

Yet another aspect of the present application provides a computer readable storage medium having instructions stored therein that, when executed on a computer, cause the computer to perform the methods described in the above aspects.

Yet another aspect of the present application provides a computer program product comprising instructions that, when executed on a computer, cause the computer to perform the methods described in the various aspects above.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background art, the drawings to be used in the embodiments of the present invention or the background art will be described below.

1 is a schematic diagram of a random access procedure in LTE;

2 is a timing diagram of a receiving window and a first scheduling of a random access response in LTE;

3 is a schematic diagram of random access preamble transmission and reception in a multi-beam communication network;

4 is a schematic diagram of a communication system according to an example of an embodiment of the present invention;

FIG. 5 is a schematic diagram of an interaction process of a communication method according to an embodiment of the present disclosure;

6 is a schematic structural diagram of a MAC PDU in LTE;

FIG. 7 is a schematic structural diagram of a MAC subheader and a MAC RAR according to an example of the present disclosure;

FIG. 8 is a schematic structural diagram of another MAC subheader and a MAC RAR according to an example of an embodiment of the present invention;

FIG. 9 is a schematic diagram of process interaction of another communication method according to an embodiment of the present invention;

10a and FIG. 10b are schematic diagrams showing a correspondence between a random access resource and an RAR window according to an example of an embodiment of the present invention;

10c is a schematic diagram of correspondence between multiple random access resources/preamble groups and RAR windows according to an example of an embodiment of the present invention;

FIG. 11 is a schematic diagram of a corresponding relationship between another random access resource and an RAR window;

FIG. 12 is a schematic structural diagram of a simplified terminal device according to an embodiment of the present disclosure;

FIG. 13 is a schematic structural diagram of a simplified network device according to an embodiment of the present disclosure;

FIG. 14 is a schematic diagram of a discontinuous random access receiving window according to an embodiment of the present invention;

FIG. 15 is a schematic diagram of a micro-slot-based random access receiving window according to an embodiment of the present invention.

detailed description

The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

Figure 4 shows a schematic diagram of a communication system. The communication system may include at least one network device 100 (only one shown) and one or more terminal devices 200 connected to the network device 100.

Network device 100 can be a device that can communicate with terminal device 200. The network device 100 may be any device having a wireless transceiving function. Including but not limited to: a base station (eg, a base station NodeB, an evolved base station eNodeB, a base station in a fifth generation (5G) communication system, a base station or network device in a future communication system, an access node in a WiFi system , wireless relay node, wireless backhaul node, etc. The network device 100 may also be a wireless controller in a cloud radio access network (CRAN) scenario. The network device 100 may also be a network device in a 5G network or a network device in a future evolved network; it may also be a wearable device or an in-vehicle device or the like. The network device 100 may also be a small station, a transmission reference point (TRP) or the like. Of course, no application is not limited to this.

The terminal device 200 is a device with wireless transceiving function that can be deployed on land, including indoor or outdoor, handheld, wearable or on-board; it can also be deployed on the water surface (such as a ship, etc.); it can also be deployed in the air (for example, an airplane, Balloons and satellites, etc.). The terminal device may be a mobile phone, a tablet (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and industrial control ( Wireless terminal in industrial control, wireless terminal in self driving, wireless terminal in remote medical, wireless terminal in smart grid, transportation safety A wireless terminal, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like. The embodiment of the present application does not limit the application scenario. A terminal device may also be referred to as a user equipment (UE), an access terminal device, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, a UE terminal device, a terminal device, Wireless communication device, UE proxy or UE device, and the like.

It should be noted that the terms "system" and "network" in the embodiments of the present invention may be used interchangeably. "Multiple" means two or more, and in view of this, "a plurality" may also be understood as "at least two" in the embodiment of the present invention. "and/or", describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately. In addition, the character "/", unless otherwise specified, generally indicates that the contextual object is an "or" relationship.

In the communication system, the downlink signal may be a synchronization signal block (SS block). One downlink signal corresponds to one transmit beam. The network device associates each downlink signal with an independent random access resource and a random access preamble. When the network device receives the random access preamble associated with a downlink signal k, the random access response is sent by using the transmit beam corresponding to the downlink signal k. The plurality of downlink signals form an uplink/downlink signal group, or a downlink signal burst (in a specific example, the downlink signal burst may be an SS burst), and the plurality of downlink signal groups that implement complete coverage are called a Downstream signal burst set (in a specific example, the downlink signal burst set may be an SS burst set).

An SS block may correspond to one or more OFDM symbols. The SS block includes at least one of the following: a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a physical broadcast channel block (PBCH), and a demodulation reference signal (demodulation reference). Signal, DMRS); SS block can also be called SS/PBCH block.

The random access resource can be understood as one or more RACH occasion/RACH transmission occasion/RACH opportunity/RACH chance. A random access preamble format may be sent in a random access opportunity; a random access burst RACH burst may include at least one random access opportunity; and a random access burst set RACH burst set may include at least one random access burst Send a group.

The following embodiments provide a communication method, which can implement scheduling transmission in a multi-beam network by flexibly configuring the transmission time of the scheduled transmission, and saves the overhead of indicating the transmission time of the scheduled transmission.

FIG. 5 is a schematic diagram of an interaction process of a communication method according to an embodiment of the present invention. The communication process may be a random access process, and the method may include the following steps:

S101. The first communication device sends a request message to the second communication device, and the second communication device receives the request message from the first communication device. The request message is used to initiate a random access, and the request message may be referred to as a random access request message, a message 1 (or msg1), a random access preamble, or other customized name, which is not limited herein. The embodiment of the present invention is described by taking a random access preamble as an example.

S102. The second communications device sends a response message to the first communications device at the first time T, where the response message is used to respond to the request message, and may be referred to as a random access response message, message 2 (or msg2), or other customized The name is not limited here. The embodiment of the present invention is described by taking a random access response as an example. The header of the media access control protocol data unit MAC PDU of the RAR includes time indication information k1, and/or the load of the MAC PDU includes time indication information k2. The first communication device receives the random access response at a first time T.

S103. The first communication device sends a scheduling message to the second communication device after the delay time K of the first time T, and the second communication device receives the delay time K after the first communication device is delayed by the first time T. Scheduled disinfection sent. Wherein, the K is related to the time indication information k1 or K is related to the time indication information k1 and k2. The scheduling message is the first scheduled transmission that is sent after the random access is successful, and may be referred to as a scheduling message, or a scheduled transmission, a message 3 (or msg3), or other names, which are not limited herein. The embodiment of the present invention is described by taking a scheduled transmission as an example.

The above interaction process involves communication between the first communication device and the second communication device. Specifically, in the embodiment of the present invention, the first communication device may be a terminal device, and the second communication device may be a network device.

Schematic diagram of random access preamble transmission and reception in a multi-beam communication network as shown in FIG. 3, in one time unit (for example, a subframe, a time slot, a minislot, an OFDM symbol, or an absolute time, etc., an example in the figure There are multiple random access opportunities in the subframe/slot. The terminal device may use multiple random access opportunities in the time unit to perform random access, that is, send random access preambles on multiple random access resources. Since the scheduled transmission has higher transmission and reception reliability than the random access response and the preamble transmission requirement, the beam can only be directed to the same or a limited number of beams in the same subframe/slot. Therefore, scheduling transmission is required. The number of beams does not match the number of received random access preamble beams or the number of transmitted random access responses in one subframe/slot, requiring more flexibility in scheduling transmission time. However, if the UL-delay field of one bit in the LTE system is still used to indicate the transmission time of the scheduled transmission, it is apparent that the indication of the transmission time of the scheduled transmission corresponding to the random access response of the plurality of random access preambles cannot be satisfied, and if If the transmission time of each scheduled transmission is separately indicated, the overhead is too large.

In this embodiment, the terminal device uses a random access opportunity on one subframe/slot to send a random access preamble on the random access resource. Then, the network device sends a random access response to the terminal device, and the terminal device receives its own random access response at the first time T. The time unit of the first time T may be a subframe, a time slot, a mini-slot, an OFDM symbol, or an absolute time, etc., and the absolute time is, for example, several milliseconds. For example, the terminal device receives a random access response or the like in the first slot of the nth subframe. Then, the terminal device transmits the scheduled transmission after delaying the duration K for the first time T. Delay The length K is related to k1, or the delay time K is related to k1 and k2. Here, k1 can be regarded as a first offset value or a common offset value, and k2 can be regarded as a second offset value or a specific offset value. K1 can occupy 1 to 3 bits.

Similar to the solution in the LTE system, the delay duration K may further include a hardware physical delay (or an initial offset value), and the initial offset value is an initial offset delay relative to the time unit in which the RAR is received. The offset value is related to hardware such as a terminal device or a network device, or can be uniformly set by the network device. The number of bits representing the initial offset value may be set to a constant, such as 0-8 bits, or may be set to a parameter associated with the RAR window, which may be an offset value relative to the start/end position of the RAR window. The initial offset value may also be configured by signaling, and the signaling may be radio resource control (RRC) signaling, medium access control-control element (MAC CE) signaling, System information (SI) and downlink control information (DCI). Thus, the delay duration K is the initial offset value plus k1, or the delay duration K is the initial offset value plus k1 and k2.

The following is described in detail:

FIG. 6 is a schematic structural diagram of a MAC PDU in LTE. The MAC PDU of the random access response includes a MAC header and a MAC payload (also referred to as MAC RAR). The MAC header is composed of a plurality of subheaders, and each subheader in LTE is one byte (8 bits) in length (in this embodiment, it may be more bytes). There is a sub-header for public information (in LTE, there is only one common MAC sub-header, the common MAC sub-header is used to carry a backoff indicator (BI), and the sub-header is optional; and in this embodiment A plurality of common MAC subheaders (also referred to as MAC subheaders in the embodiment of the present invention) may be included, and other MAC subheaders are used for the RAR. The MAC payload contains the specific content of the random access response. The common MAC subheader in the MAC header is composed of the following fields: an extension field Extension (E), a type field Type (T), a reserved field (reserved, R), and a public information field. The RAR subheader in the MAC header has a one-to-one correspondence with the RAR in the payload. The RAR subheader is composed of three fields, an extended field (E), a type field (T), and a K-bit random access preamble id (RAPID) and/or a random access resource index field. Here, K is equal to 6. 6 bits indicate random access preamble index. The MAC RAR contains four fields: 1 bit reservation (ie R), time advance (TA), uplink scheduling grant (UL grant, 20 bits), temporary cell-radio network temporary identifier (temporary cell-radio network temporary identifier). , Temporary C-RNTI).

According to K, it is related to k1, or K is related to k1 and k2. This embodiment is divided into two technical solutions, corresponding to different implementation methods:

One implementation is that for a random access response in the same time unit, the delay duration K is related to k1. Specifically, the delay duration K is an initial offset value plus k1. The time indication information k1 is included in the header of a media access control protocol data unit (PDU) of the response message. Specifically, k1 may be located in a MAC subheader for indicating backoff information; or k1 may be located in an information field of any MAC subheader; it may also be directly indicated by DCI. Among them, k1 occupies 1 to 3 bits. In another implementation, k1 may be any non-negative integer number of bits; the bits of k1 may be shared with other information in the same MAC subheader, such as the transmission frequency or subband information of the scheduled transmission, the waveform information, and the frame structure.

The time indication information k1 can be regarded as a common offset value for scheduling transmission of a plurality of ROs or a plurality of terminal devices (different terminal devices using the same or different ROs for random access) in the time unit. A plurality of terminal devices send scheduled transmissions at the same time, and distinguish between scheduled transmissions sent by different terminal devices by frequency division, code division, or space division multiplexing.

Another implementation is that for a random access response in the same time unit, the delay duration K is related to k1 and k2. Specifically, the delay duration K is an initial offset value plus k1 and k2. The time indication information k1 may be located at the head of the MAC PDU of the response message, and the time indication information k2 may be located in the payload of the MAC PDU. Specifically, k1 can be used In the MAC subheader indicating the fallback information; or k1 may be located in the information field of any other MAC subheader. Among them, k1 occupies 1 to 3 bits. K2 is located in the UL Grant field in the payload; or k2 is in the reserved bit of the payload; or k2 is located in the UL Grant field of the payload and other fields of the payload, such as reserved bits, its MAC subheader and MAC RAR The structure is shown in Figure 7. In FIG. 7, k2 is 2 bits, then 1 bit (high order) is located in the UL Grant field, and 1 bit (low order) is located in the reserved bit of the load. Of course, it may also be that the upper bits of k2 are in the reserved bits of the payload, and the lower bits are located in the UL Grant field.

The time indication information k1 can be regarded as a common offset value of a plurality of ROs or a plurality of terminal devices (the different terminal devices use different ROs for random access) in the time unit for scheduling transmission, and k2 can be regarded as the A plurality of ROs in a time unit or a plurality of terminal devices (different terminal devices use different ROs for random access) to perform a specific offset value for scheduled transmission. The terminal equipment transmits scheduled transmissions in the same beam, and according to k2, time division multiplexing distinguishes scheduled transmissions sent by different terminal devices.

Specifically, it is explained by an example: it is assumed that the initial offset value is set to N1 (subframe/slot/mini-slot/OFDM symbol/millisecond), the common offset value is N2, and the specific offset value is N3. If the terminal device detects a physical downlink control channel identified by a random access-radio network temporary identifier (RA-RNTI) in a subframe/slot/mini-slot/OFDM symbol/millisecond n (physical) Downlink control channel (PDCCH), and the corresponding DL-SCH transport block includes a response of the terminal device transmitting the preamble sequence, and the terminal device should be after n+N1+N2+N3 subframes/slot/mini-slot/OFDM symbols/msec The first physical uplink shared channel (PUSCH) channel subframe/slot/mini-slot/OFDM symbol/msec transmits msg3.

In the above two implementation manners, there are two ways for the network device to determine k1 and/or k2: one way is to pre-define or pre-store k1 and/or k2 with the indicated number of subframes/time. Correspondence between slot number/microslot number/OFDM symbol number/absolute time, as shown in Table 1, Table 2, k1 and/or k2 and indicated number of subframes/slots/microslots/OFDM symbols The number/absolute time is a time constant. Then, the terminal device can obtain the number of subframes/slots/number of microslots/number of OFDM symbols/absolute time indicated by k1 and k2 according to Table 1 and Table 2 and the received time indication information.

Table 1 Configuration of time indication information k1

K1 Indicated number of subframes/slots/microslots/number of OFDM symbols/absolute time 00 0 01 1 10 2 11 3

Table 2 Configuration of time indication information k2

K2 Indicated number of subframes/slots/microslots/number of OFDM symbols/absolute time 00 0 01 1 10 2 11 3

In another manner, k1 and/or k2 may be specifically according to the indication information, and the bandwidth, the subcarrier spacing, the frame structure, the random access preamble format, the random access preamble sequence length, and the number of random access preambles in one RO. The number of ROs associated with the downlink signal, the total number of random access preambles associated with the downlink signal, the carrier frequency, and the type of service are at least A common determination. For example, when the subcarrier spacing is 15 kHz/frame structure is the first type of frame, k1 and/or k2 are subframes or milliseconds; the subcarrier spacing is 30 kHz/frame structure is the second frame, and k1 and/or k2 are time slots. Or 0.25 milliseconds; when the subcarrier spacing is 60 kHz/frame structure is the third frame, k1 and / or k2 is the time slot or 0.25 milliseconds. For example, according to the configuration information and the subcarrier spacing information in the MAC subheader and the MAC RAR in Table 3, Table 4, and Table 5, the number of subframes/slots/the number of microslots indicated by k1 and k2 are obtained/ The number of OFDM symbols/absolute time is then calculated by the following formula to obtain the actual time. For example, based on the information of Table 3 and Table 5, the value of k1 is calculated, k1 = indication information (index) × time length (time slot); according to the information of Table 4 and Table 5, the value of k2 is calculated, k2 = indication information ( Index) × time length (time slot).

Table 3 Configuration of indication information in the MAC subheader

Indicator value Instruction information (index) 00 0 01 1 10 2 11 3

Table 4 Configuration of indication information in the MAC RAR

Indicator value Instruction information (index) 00 0 01 1 10 2 11 3

Table 5 Correspondence between subcarrier spacing and time length

Subcarrier spacing Length of time (time slot) Subcarrier spacing Length of time (time slot) 15kHz 2 120kHz 4 30kHz 4 240kHz 8 60kHz 8 480kHz 16

Specifically, in one embodiment, the initial offset value is 2 time units (eg, subframe, slot, minislot, OFDM symbol, millisecond), k1 occupies 1 bit, and k2 occupies 1 bit. At time T, the network device sends two msg2, which are respectively transmitted on different frequencies or different beam/port/OFDM symbols. The first msg2 contains N1 random access responses, and the second msg2 contains N2 random access responses. For example, multiple random access responses per msg2 need to indicate two different scheduled transmission times (ie, indicated by k2). For example, in the first msg2, the indication value of k1 in the MAC sub-header is 0. If the k2 indication in the MAC RAR in msg2 is 0, the corresponding scheduled transmission is sent in the first uplink time after time T+2. If the k2 indication in the MAC RAR in msg2 is 1, the corresponding scheduled transmission is sent at the second uplink time after time T+2; for example, in the second msg2, the indication value of k1 in the MAC subheader If it is 1, if the k2 indication in the MAC RAR in msg2 is 0, the corresponding scheduled transmission is sent at the first uplink time after time T+4, and if the k2 indication in the MAC RAR in msg2 is 1, the corresponding scheduling The transmission is sent at the second uplink time after time T+4.

Specifically, in another embodiment, the initial offset value is 2 times (eg, subframe, slot, minislot, OFDM symbol, millisecond), k1 occupies 2 bits, and k2 occupies 1 bit. At time T, the base station transmits four msg2, which are respectively at different frequencies or different beam/port/OFDM symbols. The first msg2 contains N1 random access responses, the second msg2 contains N2 random access responses, the third msg2 contains N3 random access responses, and the fourth msg2 contains N4 random access responses. Multiple random access responses in each of msg2 of four msg2 need to indicate four different scheduled transmission times (ie indicated by k2). For example, in the first msg2, the indication value of k1 in the MAC subheader is 00. If the k2 indication in the MAC RAR in msg2 is 0, the corresponding scheduled transmission is sent in the first uplink time after time T+2. If the k2 indication in the MAC RAR in msg2 is 1, the corresponding scheduled transmission is sent at the second uplink time after time T+2; for example, in the second msg2, the indication value of k1 in the MAC subheader 01, if the k2 indication in the MAC RAR in msg2 is 0, the corresponding scheduled transmission is sent at the first uplink time after time T+4, and if the k2 indication in the MAC RAR in msg2 is 1, the corresponding scheduling The transmission is performed at the second uplink time after time T+4; for example, in the third msg2, the indication value of k1 in the MAC sub-header is 10, and if k2 in the MAC RAR in msg2 indicates 0, the corresponding The scheduled transmission is sent at the first uplink time after time T+6. If the k2 indication in the MAC RAR in msg2 is 1, the corresponding scheduled transmission is sent at the second uplink time after time T+6; In the fourth msg2, the indication value of k1 in the MAC subheader is 11, if the k2 indication in the MAC RAR in msg2 0 corresponding to the transmission scheduling in the first uplink time after the transmission time T + 8, the MAC RAR msg2 if k2 is indicated as a scheduled transmission time corresponding to the transmission T + 8 after the second upstream time. Thus, the delay duration K is also determined or selected based on bandwidth, frame structure, subcarrier spacing, traffic type, and the like. The delay time K is determined by taking the frame structure and the subcarrier spacing as an example. For example, the frequency used for communication is divided into subband 1 and subband 2, each of which has random access resources. Subband 1 takes a subcarrier spacing of 15 kHz and frame structure 1, and subband 2 takes a subcarrier spacing of 30 kHz and frame structure 2. The slot length of the frame structure 1 is 1 ms, and the slot length of the frame structure 2 is 0.5 ms. Then, the sub-band 1 can be used for a terminal device with low mobility and covering a long distance, and the sub-band 2 can be used for a terminal device or service with high mobility and high delay requirement. Therefore, the random access process on the subband 1 can be determined, the delay duration K (K=k0+k1, or K=k0+k1+k2, k0 is the initial offset value, k1 is the common offset value, and k2 is the specific offset value The value of the shift is n1ms, n1=0~10, and the delay duration K of the random access procedure on the subband 2 is n2ms, n2=0.5*(0-20). When the service delay is high, the sub-band 2 is selected for random access, and the delay duration K of the random access is n2 ms. Otherwise, the sub-band 1 may be selected for random access, and the delay duration K of the random access is N1ms. In another implementation manner, the subcarrier spacing, the frame structure, and the time of each subband may be other settings, such as a subcarrier spacing of 15*2 ⁿ and a delay duration K of (0 to 160)/2 ⁿ ms, n= 0 to 5. For example, the communication at different times uses different parameters such as subcarrier spacing and frame structure, and the corresponding delay duration K may be determined or selected according to specific bandwidth, frame structure, subcarrier spacing, and service type. In the above example.

In combination with the above implementation, in another example, K = k0 + k1 * N + k2, where N is the maximum value in the range of values of k2, for example, if k2 = 0, 1, 2, 3, then N=4.

For another example, k0, k1, and k2 are determined according to the subcarrier spacing or the index u of the subcarrier spacing, for example, k0 = initial offset value × 2 ^u , k1 = indication information (index) × 2 ^u , k2 = indication information (index ) × 2 ^u .

The subcarrier spacing may be a subcarrier spacing of at least one of the following signals or channels: PBCH (Physical broadcast channel), RMSI (Remaining minimum system information), random access response, random access preamble , message 3. The subcarrier spacing may be indicated in the random access configuration information, and the network device notifies the terminal device, for example, the subcarrier spacing of the message 3 is indicated by 1 bit in the random access configuration information, and the subcarrier spacing of the random access preamble is determined by Another 1 bit indication.

The terminal device may also obtain the subcarrier spacing by other means. For example, the subcarrier spacing of the random access response is the same as the subcarrier spacing of the acquired PBCH and/or RMSI, and the subcarrier spacing of the acquired PBCH or RMSI may be used. Subcarrier spacing as a random access response.

In another embodiment, k1 and k2 indicate different time units. For example, the time unit indicated by k1 is the time slot, and k2 refers to The time unit shown is a mini-slot or an OFDM symbol. For another example, the time unit indicated by k1 is a subframe, and the time indicated by k2 is a time slot, a minislot, or an OFDM symbol.

For example, the initial offset value is 2 time slots, the terminal receives the random access response in the time slot T, and the time unit indicated by k1 is the time slot, and the time unit indicated by k2 in the MAC RAR of the terminal is the minislot mini- Slot, the terminal sends a message 3 in the k2th mini-slot of the T+2+k1 time slots.

In other embodiments, one of the plurality of bits corresponding to k1 or k2 may indicate a time unit different from a time unit indicated by the remaining portion of the bits. For example, k1 corresponds to 2 bits, the time unit indicated by the first bit is a time slot, and the time unit corresponding to the second bit is a mini-slot; for example, k2 corresponds to 2 bits, and the first bit indicates The time unit is the time slot, and the time unit corresponding to the second bit is mini-slot.

According to the communication method provided by the embodiment of the present invention, the scheduling transmission in the multi-beam network can be realized by flexibly configuring the transmission time of the scheduled transmission, which saves the overhead of indicating the transmission time of the scheduled transmission.

In another embodiment, the random access response in the same time unit is scheduled, and the frequency indication information F on the frequency can be determined by the frequency information f1 and the frequency information f2. Wherein f1 represents the subband position (or subcarrier group), the subband position corresponding to the scheduled transmission corresponding to each RAR payload in the MAC PDU; the frequency information f2 indicates that the RAR payload is located at a specific frequency position within the subband. For example, the frequency indication information f1 is included in the header of the PDU of the response message. Random access responses in different frequency units, that is, terminal devices of different beams transmit scheduled transmissions at different frequency positions, having different frequency indication information f1. Specifically, f1 may be located in a MAC subheader for indicating backoff information; or f1 may be located in an information field of any MAC subheader, or may be directly indicated by DCI. Among them, k1 occupies 1 to 8 bits. In other embodiments, f1 may be any non-negative integer number of bits; the bits of f1 may be shared with other information in the same MAC subheader, such as the transmission frequency or subband information of the scheduled transmission, waveform information, and frame structure. F2 is located in the uplink grant UL Grant field in the payload; or f2 is located in the reserved bit of the payload; or f2 is located in the UL Grant field of the payload and the reserved bit of the payload, its MAC subheader and MAC RAR The structure is shown in Figure 8. In Fig. 8, f2 is 2 bits, then 1 bit (high order) is located in the UL Grant field, and 1 bit (low order) is located in the reserved bit of the load.

For example, f1 is 2 bits, and different frequency units can be associated with different f1, as shown in Table 6 below:

Table 6 Configuration of frequency indication information f1

F1 Indicating frequency 00 Frequency 0 01 Frequency 1 10 Frequency 2 11 Frequency 3

In an embodiment, the network device can configure the time indication manner of the scheduled transmission by using the signaling, that is, the network device sends the indication information or signaling for the time indication manner for scheduling the transmission to the terminal device, and the terminal device can learn after receiving the information. The time indication mode of the scheduled transmission; the process may be carried in the remaining system message (RMSI) sent by the network device to the terminal device before the terminal device sends the random access request or the random access preamble.

For example, the indication information or the signaling includes the flag information Flag. When the flag is 0, the time indication mode of the scheduled transmission is the preset first mode; when the flag is 1, the time indication mode of the scheduled transmission is preset. The second way. In a specific implementation, not limited to two types, a more time indicating manner of scheduling transmission may be indicated by a larger Flag range. For example, the first mode of the preset is: the time delay of the scheduled transmission includes only k2, that is, the time delay information of the scheduled transmission is only included in the MAC RAR; and the delay time is K=k0+k2 after the terminal receives the random access response. , k0 is the initial offset value, and k2 is the specific offset value in the MAC RAR. For another example, the second mode preset is: the time delay of scheduling transmission is included K1 and k2, that is, the time delay information of the scheduled transmission is included in both the MAC sub-header and the MAC RAR; after the terminal receives the random access response, the delay duration is K=k0+k1+k2, k0 is the initial offset value, and k1 is the MAC. The common offset value carried in the sub-header, and k2 is a specific offset value carried in the MAC RAR.

In addition, the flag information Flag may be configured by other signaling, and the signaling may be at least one of radio resource control signaling, MAC CE, system information, and downlink control information.

In other embodiments, the various embodiments above regarding scheduling transmission time indication modes may be used in any combination.

The transmission of scheduled transmissions in a multi-beam network has been described above. However, the introduction of multiple beams also increases the number of msg2. For its receiving window, the longer the duration, the greater the scheduling flexibility of the network device, but the higher the receiving complexity of the terminal device. Therefore, for a case where there are multiple random access resources in one time unit, it is necessary to configure the RAR receiving window more reasonably.

Therefore, the following embodiments further provide a communication method. For a random access response sent in the same beam, multiple random connections can be performed by configuring an offset time of the receiving time of the random access response of one terminal device. The inbound configuration is combined to save signaling overhead, and the receiving windows can be crossed or not, which reduces the receiving complexity of the terminal device.

It should be noted that this embodiment describes the configuration of the receiving window of the random access response, which is closely related to the previous scheduling transmission. This embodiment may be further supplemented by the foregoing embodiment, and may also be described as a separate embodiment. .

FIG. 9 is a schematic diagram of a process interaction of another communication method according to an embodiment of the present invention, where the method may include the following steps:

S201. The second communications apparatus generates random access configuration information, where the random access configuration information includes: information indicating a window length of the response message window and information indicating an offset time.

S202. The second communications apparatus sends the random access configuration information, where the first communications apparatus acquires the random access configuration information.

S203. The second communication device sends a response message, where the first communications device receives the response message according to the information indicating the offset time and the information indicating the window length of the response message window.

The above interaction process involves communication between the first communication device and the second communication device. Specifically, in the embodiment of the present invention, the first communication device may be a terminal device, and the second communication device may be a network device.

Schematic diagram of random access preamble transmission and reception in a multi-beam communication network as shown in FIG. 3, in one time unit (for example, a subframe, a time slot, a minislot, an OFDM symbol, or an absolute time, etc., an example in the figure There are multiple random access opportunities for the subframe/slot. The terminal device may use multiple random access opportunities in the time unit to perform random access, that is, send random access preambles on multiple random access resources. Since the beams can only be in the same direction in the same subframe/time slot, different beams are used for one or more random access preambles respectively received on multiple random access opportunities in one subframe/slot. In response, it is possible to respond to random access preambles detected on multiple ROs in different subframes/time slots. If the RAR window is configured for each of the multiple RARs, the signaling overhead is large, and the receiving complexity of the terminal device is also high.

In this embodiment, the network device configures the RAR receiving window of the terminal device by using the random access configuration information. Therefore, as described in step S101, the network device needs to be configured as random access configuration information, where the random access configuration information includes: Information indicating the window length of the random access response RAR window and information indicating the offset time. Then, as described in step S102, the network device sends the random access configuration information, and the terminal device acquires the random access configuration information. Specifically, the network device sends the random access configuration information to the terminal device by using the system information, the RRC, or the DCI, and the terminal device receives the SI, the RRC, the MAC CE, or the DCI, and obtains the random access configuration information included in the signaling. Certainly, the random access configuration information of the terminal device may also be predefined or pre-stored by the terminal device, and the information for configuring the random access receiving window may have other names.

For example, the format of sending random access configuration information through RRC signaling is as follows:

The above ts represents a unit of time, such as a subframe, a slot, a minislot, an OFDM symbol, or an absolute time.

The random access configuration information includes: ra-response windowsize information indicating the RAR window and information indicating an offset time. If the network device sends the random access configuration information through the SI, specifically, the window length of the RAR window is obtained from remaining system information (RMSI, or other system information). In addition, the offset time information can also be obtained from the RMSI.

Wherein, the window length indicates the duration of the RAR window. The terminal device receives the RAR within the RAR window until it receives the RAR that matches itself, or until the RAR window ends. Generally, the window length of the RAR window corresponding to the RAR transmitted in the same beam is the same.

Wherein, the offset time (ra-responsewindowoffset) refers to the offset time between two RAR windows. The offset time can be calculated from the starting position of the RAR window or from the end position of the RAR window. The offset time may be a constant, such as 0 to 64, or may be determined or selected according to bandwidth, frame structure, subcarrier spacing, service type, and the like.

Specifically, as an implementation manner, as shown in FIG. 10a and FIG. 10b, a schematic diagram of a correspondence between a random access resource and a RAR window. In the two figures, the offset time is calculated from the start position of the RAR window. . Specifically, it is assumed that one RACH subframe/slot includes four random access resources/random access resource groups (the random access resource group may be a random access resource on time-frequency resources, or may be the same one) A set of random access resources of a plurality of different frequency domain resources on the time domain resource, and a random access resource may include one or more random access preambles, respectively, numbered 0, 1, 2, 3. For the first random access resource/random access resource group (numbered 0) in the RACH subframe/slot, the start time of the corresponding RAR window is the last subframe from which the random access preamble is transmitted. The start time of the random access resource after the time slot (ra-ResponseWindowStart), the window length of the RAR window or the RAR duration is ra-ResponseWindowSize. The receiving window corresponding to the i-th random access resource/random access resource group (numbered as i-1) in the RACH subframe/slot is the receiving window corresponding to the first random access resource/random access resource group. Time window shift (i-1)*ra-ResponseWindowOffset sub-frames/time slots to get the time window.

Therefore, the S203 specifically includes: the network device sends an RAR, and the terminal device receives the RAR according to a start time of the RAR window and a window length of the RAR window; wherein, a start time of the RAR window Corresponding to the information indicating the offset time. The network device sends the RAR to the terminal device, and the terminal device receives the RAR in the RAR window until receiving the RAR that matches itself, or until the RAR window ends. The start time of the RAR window is related to the information indicating the offset time, and is that the start time of the subsequent random access resource except the first random access resource is the first random access resource. The start time of the receiving window plus the corresponding offset time. As shown in FIG. 10a, the start time of the RAR window of resource 1 is the start time of the RAR window of resource 0 plus the offset time; the start time of the RAR window of resource 2 is the start time of the RAR window of resource 0. Plus 2 times the offset time, and so on. Of course, the offset time corresponding to each resource may be a multiple of the offset time of the example herein, or each resource may be configured with a different offset time.

The terminal device is to receive the RAR, and the random access configuration information may include an indication RAR for multiple random access opportunities The information of the window length and the offset time of the window, the terminal device does not know what the offset time of the window is, that is, the terminal device does not know which resource to start receiving the RAR at the start time of the RAR window corresponding to the resource. Therefore, the method may further include the step of: the terminal device acquiring a start time of the RAR window. The start time may be configured by a higher layer, or may be pre-defined or pre-stored as a constant by the terminal device, for example, 0 to 8 bits.

Specifically, for example, four ROs are included in one subframe, and index information of each RO is 0 to 3. Different ROs may be associated with different RAR window offset times or associated with different RAR start times. Therefore, for the start time of the RAR window, the terminal device acquires the start time of the RAR window, which specifically includes: the terminal device acquires index information of the random access resource; And shifting time information and index information of the random access resource to determine a start time of the RAR window. Because the random access configuration has a corresponding index information for each random access opportunity, the terminal device generally sends the preamble according to the index information of the resource, and thus may also be based on the index information of the resource (or according to the random access resource. The index of the associated downstream signal is used to determine the start time of the RAR window. As shown in FIG. 10a, the index information of the resource is the number of the resource, and the RAR is determined according to the resource number. The start time of the RAR window of resource 1 is the start time of the RAR window of resource 0 plus the offset time; the start time of the RAR window of resource 2 is the start time of the RAR window of resource 0 plus 2 times offset Time, and so on.

Further, it should be noted that the offset time may be equal to 0, indicating that multiple random access resources/random access resource groups correspond to the same receiving window; the offset time may also be smaller than the window length of the RAR window, indicating adjacent There is a fixed offset between the start positions of the RAR windows corresponding to the random access resource/random access resource group, and there is a cross between the receiving windows. As shown in FIG. 10a, there is a cross between the receiving windows, so that multiple beams are formed. The total time of the receiving window of the RAR does not increase too much, and the complexity of receiving the terminal device is reduced; the offset time may also be greater than or equal to the window length of the RAR window, indicating the adjacent random access resource/random access resource group. There is a fixed offset between the starting positions of the corresponding RAR windows, and there is no intersection between the receiving windows, as shown in Figure 10b.

In the LTE system, the RAR window length is configured by the base station and is relatively long, usually in the order of milliseconds. The RAR window start time is usually fixed and cannot be adapted to the diversified service requirements and multi-carrier application scenarios in the future 5G NR system. Design a flexible RAR window length and start time design method.

An embodiment of the present invention further discloses a method for determining a RAR window, where a network device and a terminal device respectively determine an RAR window length and/or a RAR window start time according to a subcarrier spacing, and according to the RAR window length and/or RAR window. Start time to send or receive RAR. In addition, the RAR window length can be further referenced to the initial RAR window length determination.

The proposal for the above scheme in the 5G NR standard is:

Proposal 14: NR supports different RAR windows for different sets of preamble formats:

For preamble formats with sequence length L=839, the RAR window start time is fixed at X=3ms and the window size is configured by gNB,which is one of{2ms,3ms,4ms,5ms,6ms,7ms,8ms,10ms };

For preamble formats with sequence length L=127/139, the RAR window start time and RAR window size should be dependent on the subcarrier spacing of the preamble.

The first case is similar to LTE, and the RAR window length is unchanged. In the second case, the RAR window length is variable, and can be determined according to the subcarrier spacing. For example, the RAR window length is determined according to the subcarrier spacing of the random access preamble.

In an implementation manner, the RAR window length is related to the subcarrier spacing, and further needs to refer to the initial RAR window length preconfigured by the network device. For example, referring to ra-ResponseWindowSize in LTE, the value of the ra-ResponseWindowSize may be notified by the network device. The device notifies the terminal device, for example, via a system message.

Both the network device and the terminal device can determine the RAR window length according to the initial RAR window length and the subcarrier spacing.

The subcarrier spacing is a subcarrier spacing of at least one of the following signals or channels: PBCH, RMSI, random access response, random access preamble, message 3.

The subcarrier spacing may be specified in the random access configuration information. This can provide a unified RAR window determination manner for different subcarrier intervals, thereby reducing signaling overhead.

For example, the RAR window length is ra-ResponseWindowSize*Scale, where Scale is related to the random access response subcarrier spacing or the index u of the subcarrier spacing. In one implementation, Scale=2 ^u . As another embodiment, the value of Scale is as shown in Table 7:

Table 7 Correspondence between subcarrier spacing and Scale for random access response

Subcarrier spacing for random access response Scale 15kHz S0 30kHz S1 60kHz S2 120kHz S3 240kHz S4 480kHz S5

For another example, the RAR window length is ra-ResponseWindowSize*Scale, where Scale is related to the subcarrier spacing of the random access preamble or the index u of the subcarrier spacing. In one implementation, Scale=2 ^u . The value of Scale is shown in Table 8:

Table 8 Correspondence between subcarrier spacing and Scale for random access preamble

Random access preamble subcarrier spacing Scale 1.25kHz S0 5kHz S0 15kHz S1 30kHz S2 60kHz S3 120kHz S4 240kHz S5 480kHz S6

S0 to S6 in Tables 7 and 8 may be any non-negative integer between 0 and 128. Alternatively, for any two subcarrier spacings i and j, if the subcarrier spacing i < j, then Si ≤ Sj. Alternatively, for any two subcarrier spacings i and j, if the subcarrier spacing i < j, then Si ≥ Sj.

In the above solution, the start time of the RAR window (ra-ResponseWindowStart) may also be determined according to the subcarrier spacing, for example, ra-ResponseWindowStart=W*2 ^u time slots, and W may be any preset or configured non-negative integer; For example, when the carrier frequency is less than 3 GHz, it is ra-ResponseWindowStart=3*2 ^u time slots, and when the carrier frequency is greater than 3 GHz and less than 6 GHz, it is ra-ResponseWindowStart=2*2 ^u time slots, and the carrier frequency is greater than 6 GHz. When, it is ra-ResponseWindowStart=2 ^u time slots.

Based on the above method, corresponding network devices and terminal devices are also disclosed:

A network device, including:

Processing module: configured to determine a response message window length and/or a response message window start time according to the subcarrier spacing;

a sending module, configured to send a response cancellation to the terminal device according to the response message window length and/or the response message window start time interest.

The processing module is further configured to obtain an initial response message window length, and determine the response message window length according to the initial response message window length and the subcarrier interval.

The sending module is further configured to send the initial response message window length to the terminal device.

A terminal device comprising:

Processing module: configured to determine a response message window length and/or a response message window start time according to the subcarrier spacing;

The sending module is configured to receive a response message sent by the network device according to the response message window length and/or the response message window start time.

Further, the receiving module is configured to receive an initial response message window length delivered by the network device, and the processing module is further configured to determine the response message window length according to the initial response message window length and the subcarrier interval.

The network device and the terminal device respectively perform the corresponding steps of the network device and the terminal device in the foregoing method embodiment, and are executed by the corresponding function module. The foregoing network device and the terminal device may further include a receiving module, and respectively perform the receiving step in the method embodiment, which is not detailed in the specific reference to the method embodiment.

In the LTE system, the terminal device needs to perform random access response (RAR) reception within the duration of the RAR window length, but in reality, the network device may only perform RAR transmission within a certain period of time within the RAR window length, and The terminal device needs to monitor the entire RAR window length, which causes the terminal device to waste power.

The embodiment of the present invention provides a method for transmitting RAR. The terminal device performs RAR reception at intervals of RAR window length, and does not need to monitor the entire RAR window length. Similarly, the network device is only in the RAR window length. The RAR is transmitted every interval; that is, within the RAR window length, the random access receiving window appears once every interval, and the interval time may be fixed or unfixed.

Referring to FIG. 14, for example, each random access receiving window and offset time appear in time at the same interval StepSize. The gray area indicates the time period during which the RAR may appear in the RAR window (T+2, T+4...T+2n), indicating that the network device may send the RAR, and/or the terminal may need to listen to the random access response. The receiving window of the random access response i corresponding to the i-th random access resource/random access resource group (numbered i-1) in the RACH subframe/slot is the first random access resource/random The receiving window corresponding to the access resource group shifts to the time axis (i-1)*StepSize*ra-ResponseWindowOffset sub-frames/slots to obtain a time window, and the terminal only receives the RAR receiving window time:

(i-1)*StepSize*ra-ResponseWindowOffset+(k-1)*StepSize,

Where k=1, 2,...,ra-ResponseWindowSize, i and k are numbered starting from 1.

It can be understood that the time when the random access response i appears is displayed at equal intervals in the StepSize time interval.

The time interval of the random access receiving window can be determined by the network device and sent to the terminal device.

For example, in FIG. 14, StepSize=2, i=1, ra-ResponseWindowSize=n, and ra-ResponseWindowStart=1.

For example, the StepSize is configured by signaling, and the signaling may be at least one of radio resource control signaling, MAC CE, system information, and downlink control information, and is sent by the network device to the terminal device. Optionally, the StepSize may also be determined according to the sub-carrier spacing information or the index u of the sub-carrier spacing. For example, a scale-like implementation may be adopted, and details are not described herein again.

Optionally, ra-ResponseWindowSize, and/or ra-ResponseWindowOffset are also related to parameters such as carrier frequency range, bandwidth, frame structure, and traffic type. ra-ResponseWindowSize is the initial RAR window length.

Through the above method, the terminal device does not need to continuously monitor the RAR all the time in the entire RAR window length, but monitors the time interval of each interval in the receiving window, thereby saving the power of the terminal device.

In a further embodiment, ra-ResponseWindowStart (or ra-ResponseWindowStart and corresponding offset time) indicates that the last time position (eg, subframe, time slot, minislot) at which the random access preamble is transmitted begins, to RAR The start time of the window. The last time the random access preamble is transmitted and the start time of the RAR window may be a subframe, a time slot, a minislot mini-slot, or an OFDM symbol. For example, as shown in FIG. 15, in one implementation, the time width (unit) of the random access preamble is a time slot, and the time width (unit) of the random access response is a mini-slot; different random The access preamble/resource group responds with different random access responses; within the random access receiving window, there are 4 minislots in one slot, and the random access response of the i th random access preamble/resource group is The i-th micro-slot is transmitted (i=0, 1, 2, 3), and one slot can transmit a total of four random access responses; the start time of the RAR window corresponding to four random access responses is the time slot T+ The corresponding microslot in 3, that is, the RAR window start time of the i-th random access preamble/resource group in the time slot T is the i-th micro-slot in the time slot T+3, that is, multiple random times The offset time between RAR windows of the access response is 0 time slots (but there is an offset on the minislot), and the random access window start time (ra-ResponseWindowStart) is at least 3 time slots, for example, The start time of the random access preamble/resource group 3 is actually 3 time slots + 3 mini-slots.

In another embodiment, the random access reception window start time (ra-ResponseWindowStart), the offset time (ra-responsewindowoffset), the window length of the RAR window, or the window length of the initial RAR window (ra-ResponseWindowSize) are two Part of the composition, each part corresponds to different time units. For example, the time unit of the first part is a time slot, and the time unit of the second part is a mini-slot mini-slot, wherein the time of the first part can be signaled (eg, system information, PBCH, RMSI, RRC signaling, DCI, MAC CE) Specify), the second part of the time can be specified by signaling, or can be determined in an implicit manner. For example, the temporal location of a particular minislot in which the random access response is located may be specified by signaling or implicitly obtained according to a random access preamble/resource index. For the specific implementation manner, reference may be made to the indication manner of scheduling transmission time, and details are not described herein again.

In addition, the network device may send a time indication manner indicating that the RAR window start time and the RAR window length are indicated to the terminal device; the terminal determines the RAR window start time and the window length according to the indication information of the network device. For example, when the network device indication information is FlagWin, when FlagWin=0, the RAR window start time and the window length are time slots; when FlagWin=1, the RAR window start time and the window length are both time slots and micro time slots. The two-part time unit of the gap; when FlagWin=3, the RAR window start time and the length of the window length are micro-slots; when FlagWin=4, the time unit of the RAR window length is the time slot, and is configured by a preset or network device. The interval StepSize appears; of course, other indication manners may also be adopted, which is not limited in this embodiment.

In another implementation manner, the random access receiving window start time (ra-ResponseWindowStart), the offset time (ra-responsewindowoffset), the window length of the RAR window, or the window length of the initial RAR window (ra-ResponseWindowSize) Any one of the parameters and the random access preamble format, the random access preamble sequence length, the carrier frequency, the number of ROs in one slot (or the number of downlink signals associated with the random access resources in one slot, or one) The number of corresponding random access response messages in the slot, the number of random access preambles in one RO, the number of ROs associated with the downlink signal, and at least one parameter of the total number of random access preambles associated with the downlink signal are related. For example, when the random access preamble sequence length is L=839, the random access receiving window start time is fixed/configured as ra-ResponseWindowStart=3ms; when L=127 or 139, the random access receiving window start time is fixed/configured. It is ra-ResponseWindowStart=0ms, where the length of the random access preamble sequence is indicated by signaling (for example, the indication information occupies 1 bit). For another example, when the carrier frequency is less than 6 GHz, ra-ResponseWindowStart = 3 ms; when the carrier frequency is not less than 6 GHz, ra-ResponseWindowStart = 1 ms. For example, when the number of ROs or the number of corresponding random access response messages in one slot is N, the RAR window length is N*ra-ResponseWindowSize.

In a further embodiment, the terminal receives a random access response at all time locations within the RAR window. Specifically, the time unit of the RAR window is a time slot, and each time slot has multiple mini-slot mini-slots, and the terminal attempts to receive a random access response in each mini-slot mini-slot in the RAR window; or The time unit of the RAR window is a subframe, and there are multiple slots/microslot mini-slot/OFDM symbols in each subframe, and each slot/microslot mini-slot/OFDM symbol of the terminal in the RAR window The number attempts to receive a random access response. In another implementation manner, the mini-slot/OFDM symbol position that may occur in the RAR intra-window random access response is specified by the base station, for example, by at least one of system information, PBCH, RMSI, RRC signaling, DCI, MAC CE, and the like. Specified.

The random access response in the present invention may be the downlink control channel or the downlink control information DCI corresponding to the random access response message, when the downlink control channel and the message of the random access response are at the same time (for example, a subframe, a time slot, When transmitting in microslots, it is also possible to refer to both at the same time.

In another embodiment, the same terminal device may separately send multiple random access preambles in multiple random access resources/preamble groups, and then receive a random access response (RAR), then the RAR window of the terminal device The length may be a collection of RAR windows corresponding to the plurality of random access resources/preamble groups respectively. That is, the terminal device sends multiple random access preambles to the network device in the multiple random access resources/preamble group, and the terminal device receives the multiple in the collection of the RAR windows corresponding to the multiple random access preambles respectively. Random access one or more random access responses corresponding to the preamble. That is, the plurality of RAR windows corresponding to the plurality of random access preambles overlap in time, and the collection of the plurality of RAR windows corresponding to the plurality of random access preambles is used as a random access receiving window of the terminal device as a whole.

For example, as shown in FIG. 10c, the random access preamble in the same random access resource/preamble group is responded by the same Msg2, and the random access resource/preamble group 1 and group 2 respectively correspond to a random access receiving window. The random access resources/preamble group 1 and group 2 are respectively divided into two subsets. In the random access resource/preamble group 1 and the subset 1 of the group 2, after the terminal device sends a random access preamble, it needs to wait to receive the random access response before allowing the random access preamble to be sent again. The terminal device may transmit multiple random access preambles in the random access resources/preamble group 1 and subset 2 of group 2, and then wait to receive the random access response. For example, the terminal device may send a random access preamble to each of the network devices in a subset 2 of the random access resource/preamble group 1 and a subset 2 of the random access resource/preamble group 2, for a total of two random accesses. Leading. In this embodiment, the random access receiving window corresponding to the two random access preambles sent by the terminal device is: a random access resource/preamble group 1 subset 1 receiving window and a random access resource/preamble group 2 subset 1 The collection of receiving windows, that is, the terminal device monitors the random access response in two receiving windows. Optionally, the terminal device uses the same RA-RNTI when receiving in the collection of the random access resource/preamble group 1 subset 1 receiving window and the random access resource/preamble group 2 subset 1 receiving window. Optionally, when the terminal receives the random access resource/preamble group 1 subset 1 receiving window and the random access resource/preamble group 2 subset 1 receiving window, the terminal uses the corresponding different RA-RNTI. Optionally, if the random access resource/preamble group 1 subset 1 receive window and the random access resource/preamble group 2 subset 1 receive window have an intersection in time, then there is no intersection in the two receive windows. When receiving, the corresponding random RA-RNTI is used to simultaneously monitor the random access response at the same time in the two receiving windows.

As another implementation manner, a schematic diagram of a correspondence between another random access resource and an RAR window is shown in FIG. 9. In this figure, the offset time is calculated from the end position of the RAR window, that is, the receiving windows of different RARs are separated by an offset time. The S203 specifically includes: the network device sends the RAR, and the terminal device receives the RAR according to a start time of the RAR window, the offset time, and a window length of the RAR window. The network device sends the RAR to the terminal device, and the terminal device receives the RAR in the RAR window until receiving the RAR that matches itself, or until the RAR window ends.

The start time of the RAR window is a time when the terminal device sends a random access preamble plus N time units, where N is an integer greater than 1. The time unit is a subframe, a time slot, a minislot, an OFDM symbol, or an absolute time. Different ROs can be associated with different start times or with different ROs associated with different offset times. For example, if the terminal device is a preamble transmitted on the resource 1, the terminal device receives the RAR within the window length after the time of sending the preamble plus the time of N time units, and the end position of the RAR window is greater than the RAR of the resource 0. The end position of the window is separated by an offset time; the end position of the RAR window of resource 2 is 2 times longer than the end position of the RAR window of resource 0. Move time, and so on. The start time of each RAR window can be configured through a high layer, or it can be predefined or pre-stored as a constant by the terminal device.

The above ra-ResponseWindowStart is optional and can indicate the physical delay of the network device receiving and processing the random access preamble and the random access response. In other embodiments, the configuration is a fixed value and does not need to be sent; in other embodiments, the configuration may be based on a carrier frequency range, bandwidth, frame structure, subcarrier spacing, service type, etc., in which the random access is located. The parameter lookup table is obtained. For example, ra-ResponseWindowStart=W*2 ^u time slots, W can be any preset or configured non-negative integer; for example, when the carrier frequency is less than 3 GHz, it is ra-ResponseWindowStart=3*2 ^u time slots, in When the carrier frequency is greater than 3 GHz and less than 6 GHz, it is ra-ResponseWindowStart=2*2 ^u time slots, and when the carrier frequency is greater than 6 GHz, it is ra-ResponseWindowStart=2 ^u time slots.

In other embodiments, the above various embodiments regarding the scheduling transmission time indication manner, the random access response window start time, the offset time, and the window length may be used in combination in any manner.

According to the communication method provided by the embodiment of the present invention, for a random access response sent in the same beam, multiple random accesses may be configured by configuring an offset time of the receiving time of the random access response of the terminal device. In response to the joint configuration, the signaling overhead is saved, and the receiving windows can be crossed or not intersected, which reduces the receiving complexity of the terminal device.

The various methods of the embodiments of the present invention are described in detail above, and the corresponding devices corresponding to the respective method embodiments of the embodiments of the present invention are provided below.

The embodiment of the present application may perform the division of the function module or the function unit on the terminal device or the network device according to the foregoing method example. For example, each function module or function unit may be divided according to each function, or two or more functions may be integrated. In a processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner. The following is an example of dividing each functional module by using corresponding functions.

The device corresponding to each method embodiment may include a sending module and/or a receiving module, respectively, for performing the steps of sending or receiving the method embodiment, and the sending module and/or the receiving module may synthesize the transceiver module; A module for performing steps other than transmitting and receiving in the method embodiment.

In addition, the apparatus corresponding to each method embodiment has another form, that is, the function of the foregoing sending module is implemented by a transmitter, the function of the receiving module is implemented by a receiver, and the transmitter and the receiver can be collectively referred to as a transceiver; Implemented by the processor.

Each of the foregoing devices may be a chip, or may be a network device or a terminal device corresponding to each method embodiment.

The embodiment of the present application further provides a communication device, which may be a terminal device or a chip. The communication device can be used to perform the steps performed by the first communication device in Figures 5 and/or 9.

The embodiment of the present application further provides a communication device, which may be a network device, or a baseband single board of a network device, or a chip. The communication device can be used to perform the steps performed by the second communication device in Figures 5 and/or 9.

Figure 12 shows a simplified schematic diagram of the structure of a terminal device. For ease of understanding and illustration, in FIG. 12, the terminal device uses a mobile phone as an example. As shown in FIG. 12, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input/output device. The processor is mainly used for processing communication protocols and communication data, and controlling terminal devices, executing software programs, processing data of software programs, and the like. Memory is primarily used to store software programs and data. The RF circuit is mainly used for the conversion of the baseband signal and the RF signal and the processing of the RF signal. The antenna is mainly used to transmit and receive RF signals in the form of electromagnetic waves. Input and output devices, such as a touch screen, a display screen, a keyboard, etc., are mainly used to receive data input by a user and Output data to the user. It should be noted that some types of terminal devices may not have input and output devices.

When the data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal, and then sends the radio frequency signal to the outside through the antenna in the form of electromagnetic waves. When data is transmitted to the terminal device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. In an actual terminal device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device or the like. The memory may be independent of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.

In the embodiment of the present application, an antenna and a radio frequency circuit having a transceiving function can be regarded as a receiving unit and a transmitting unit (also collectively referred to as a transceiving unit) of the terminal device, and a processor having a processing function is regarded as a processing unit of the terminal device. . As shown in FIG. 12, the terminal device includes a receiving unit 1201, a processing unit 1202, and a transmitting unit 1203. The receiving unit 1201 may also be referred to as a receiver, a receiver, a receiving circuit, etc., and the transmitting unit 1203 may also be referred to as a transmitter, a transmitter, a transmitter, a transmitting circuit, or the like. The processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, and the like.

For example, in an embodiment, the sending unit 1203 is configured to perform step S101 of the embodiment shown in FIG. 5, the receiving unit 1201 is configured to perform step S102 of the embodiment shown in FIG. 5, and the sending unit 1203 is further configured to execute the figure. Step 103 of the embodiment shown in 5.

As another example, in another embodiment, the processing unit 1202 is configured to perform the step of acquiring random access configuration information. The receiving unit 1201 is for performing the steps of S202 and S203 in FIG.

Figure 13 shows a schematic diagram of a simplified network device structure. The network device includes a radio frequency signal transceiving and converting portion and a portion 1302. The radio frequency signal transceiving and converting portion further includes a receiving unit 1301 portion and a transmitting unit 1303 portion (also collectively referred to as a transceiving unit). The RF signal transmission and reception and conversion part is mainly used for transmitting and receiving RF signals and converting RF signals and baseband signals; the 1302 part is mainly used for baseband processing and control of network equipment. The receiving unit 1301 may also be referred to as a receiver, a receiver, a receiving circuit, etc., and the transmitting unit 1303 may also be referred to as a transmitter, a transmitter, a transmitter, a transmitting circuit, or the like. The portion 1302 is typically a control center for a network device, and may generally be referred to as a processing unit for controlling the network device to perform the steps performed by the second communication device of FIG. 5 or FIG. 9 above. For details, please refer to the description of the relevant part above.

The 1302 portion may include one or more boards, each of which may include one or more processors and one or more memories for reading and executing programs in the memory to implement baseband processing functions and to network devices control. If multiple boards exist, the boards can be interconnected to increase processing power. As an optional implementation manner, multiple boards share one or more processors, or multiple boards share one or more memories, or multiple boards share one or more processes at the same time. Device.

For example, in one embodiment, the receiving unit 1301 is configured to perform the steps of S101 and S103 in FIG. 5, and the transmitting unit 1302 is configured to perform the steps of S102 in FIG.

For another example, in another embodiment, the processing unit 1302 is configured to perform the steps of S201 in FIG. 9, and the sending unit 1303 is configured to perform the steps of S202 and S203 in FIG.

As another optional implementation manner, with the development of the system-on-chip (SoC) technology, all or part of the functions of the 1302 part and the 1301 part may be implemented by the SoC technology, for example, by A base station function chip is implemented. The base station function chip integrates a processor, a memory, an antenna interface and the like. The program of the base station related function is stored in the memory, and the program is executed by the processor to implement the related functions of the base station. Optionally, the base station function chip can also read the memory external to the chip to implement related functions of the base station.

The application also provides the following embodiments:

Embodiment 1 A communication device, comprising:

a receiving unit, configured to receive a response message from the network device at the first time T;

a sending unit, configured to send a scheduling message to the network device after the delay time K of the first time T;

Wherein the K is associated with the time indication information k1 or K is associated with the time indication information k1 and k2; wherein the k1 is located at the head of the Medium Access Control Protocol Data Unit MAC PDU of the response message, the k2 is located The load of the MAC PDU.

Embodiment 2: The communication device of Embodiment 1, wherein the communication device further comprises:

The processing unit is configured to obtain random access configuration information, where the random access configuration information includes at least one of the following: a window length of the response message window and length information of the random access preamble sequence.

Embodiment 3: The communication device according to Embodiment 2, wherein the receiving unit is configured to:

Receiving the response message according to a start time of the response message window, an offset time, and a window length of the response message window; or

The response message is received according to a start time of the response message window and a window length of the response message window.

Embodiment 4. The communication device of embodiment 2, wherein:

The start time of the response message window is related to the random access preamble sequence length information;

The window length of the response message window is related to the subcarrier spacing of the random access preamble or random access response.

Embodiment 5: A communication method, comprising:

Receiving a response message from the network device at the first time T;

Sending a scheduling message to the network device after the delay time K of the first time T;

Wherein the K is associated with the time indication information k1 or K is associated with the time indication information k1 and k2; wherein the k1 is located at the head of the Medium Access Control Protocol Data Unit MAC PDU of the response message, the k2 is located The load of the MAC PDU.

The method of embodiment 5, wherein before the receiving the response from the network device at the first time T, the method further comprises:

Obtaining random access configuration information, where the random access configuration information includes at least one of: a window length of the response message window and a random access preamble sequence length information.

The method of claim 6, wherein the receiving the response message from the network device at the first time T, specifically:

Receiving the response message according to a start time of the response message window, an offset time, and a window length of the response message window; or

The response message is received according to a start time of the response message window and a window length of the response message window.

Embodiment 8. The method of embodiment 6, wherein:

The start time of the response message window is related to the random access preamble sequence length information;

The window length of the response message window is related to the subcarrier spacing of the random access preamble or random access response.

Embodiment 9, a communication device, comprising:

a sending unit, configured to send a response message to the terminal device at the first time T, where the head of the media access control protocol data unit MAC PDU of the response message includes time indication information k1;

The receiving unit is further configured to receive a scheduling message that is sent by the terminal device after the delay time K of the first time T, where the K is related to the time indication information k1; or

a sending unit, configured to send a response message to the terminal device at the first time T, where a header of the media access control protocol data unit MAC PDU of the response message includes time indication information k1, and a load of the MAC PDU Including time indication information k2;

The receiving unit is further configured to receive a scheduling message that is sent by the terminal device after the delay time K of the first time T, where the K is related to the time indication information k1 and k2.

Embodiment 10: The communication device according to Embodiment 9, wherein the k1 and k2 are constant, or the k1 and k2 are determined according to at least one parameter, wherein the at least one parameter includes: a bandwidth, a sub Carrier spacing, frame structure, random access preamble format, random access preamble sequence length, carrier frequency, and service type.

The communication device of the embodiment 9 or 10, further comprising:

And a processing unit, configured to generate random access configuration information, where the random access configuration information includes at least one parameter: information indicating a window length of the random access response response message window, a random access preamble format, and a random access preamble sequence Length information

The communication unit is further configured to send the random access configuration information.

Embodiment 12: A communication method, comprising:

Sending a response message to the terminal device at the first time T, wherein the header of the medium access control protocol data unit MAC PDU of the response message includes time indication information k1;

Receiving, by the terminal device, a scheduling message sent after the delay time K of the first time T, wherein the K is related to the time indication information k1; or

Sending a response message to the terminal device at the first time T, where the header of the medium access control protocol data unit MAC PDU of the response message includes time indication information k1, and the load of the MAC PDU includes time indication information k2 ;

Receiving, by the terminal device, a scheduling message sent after the delay time K of the first time T, wherein the K is related to the time indication information k1 and k2.

The method of embodiment 12, wherein the k1, k2 are constant, or the k1, k2 are determined according to at least one parameter, the at least one parameter comprising: bandwidth, subcarrier Interval, frame structure, random access preamble format, random access preamble sequence length, and service type.

The method of the embodiment 12 or 13, wherein before the sending the response message to the terminal device at the first time T, the method further includes:

Generating random access configuration information, where the random access configuration information includes at least one parameter: window length information indicating a response message window, a random access preamble format, and random access preamble sequence length information;

Sending the random access configuration information.

The method of any one of embodiments 1, 5, 9 or 12, wherein the k1 is located in a MAC subheader for indicating fallback information; or the k1 is located in any MAC The subheader is in the information field.

The method of any one of embodiments 1, 5, 9 or 12, wherein the k2 is located in an uplink grant UL grant field in the payload, and/or the k2 is located in the In the reserved bits of the load.

The method of any one of embodiments 1, 5, 9 or 12, wherein the k1 occupies 1 to 3 bits.

Embodiment 18: A method for determining a response message window, comprising:

The network device determines a response message window length and/or a response message window start time based on the subcarrier spacing, and transmits a response message to the terminal device based on the response message window length and/or the response message window start time.

The method of embodiment 18, wherein the determining, by the network device, the response message window length according to the subcarrier spacing comprises:

The network device determines the response message window length according to the initial response message window length and the subcarrier spacing;

The method may further include: the network device transmitting the initial response message window length to the terminal device.

The method of embodiment 18 or 19, wherein the subcarrier spacing is a subcarrier spacing of at least one of the following signals or channels: physical broadcast channel PBCH, residual system information RMSI, random access response, random Access preamble, message 3.

Embodiment 21: A method for determining a response message window, comprising:

The terminal device determines the response message window length and/or the response message window start time according to the subcarrier interval, and receives the response message sent by the network device according to the response message window length and/or the response message window start time.

The method of embodiment 21, the determining, by the terminal device, the response message window length according to the subcarrier spacing comprises:

The terminal device receives an initial response message window length sent by the network device, and determines a response message window length according to the initial response message window length and the subcarrier interval.

The method of embodiment 21 or 22, wherein the subcarrier spacing is a subcarrier spacing of at least one of the following signals or channels: physical broadcast channel PBCH, residual system information RMSI, random access response, random Access preamble, message 3.

The above response message is RAR.

Embodiment 24 is a network device, including:

Processing module: configured to determine a response message window length and/or a response message window start time according to the subcarrier spacing;

The sending module is configured to send a response message to the terminal device according to the response message window length and/or the response message window start time.

Embodiment 25: A terminal device, including:

Processing module: configured to determine a response message window length and/or a response message window start time according to the subcarrier spacing;

The sending module is configured to receive a response message sent by the network device according to the response message window length and/or the response message window start time.

It can further include:

The receiving module is configured to receive an initial response message window length delivered by the network device.

The processing module is further configured to determine a response message window length according to the initial response message window length and the subcarrier spacing.

Embodiment 26: A communication device, comprising:

a processing unit, configured to acquire subcarrier spacing information of the random access configuration information and/or the random access response message, where the random access configuration information includes at least one parameter: window length information indicating a response message window, and random access Preamble format, random access preamble sequence length information;

a receiving unit, configured to receive, according to a start time of the response message window and a window length of the response message window, a response message from the network device;

The start time of the response message window is determined according to the random access preamble format and/or the random access preamble sequence length information, and/or

The window length of the response message window is determined according to the information of the window length of the indication response message window and/or the subcarrier spacing information of the response message.

The communication device of embodiment 26, wherein the start time of the response message window is a time for transmitting a random access preamble plus a time of N time units, wherein N is greater than 1 An integer, where the time unit is a subframe, a time slot, a minislot, an OFDM symbol, or an absolute time.

Embodiment 28: A communication method, comprising:

Acquiring the subcarrier spacing information of the random access configuration information and/or the random access response message, where the random access configuration information includes at least one parameter: a window length indicating a random access response response message window, and a random access preamble format And random access preamble sequence length information;

Determining a start time of the response message window according to the random access preamble format and/or random access preamble sequence length information;

Determining, according to the information of the window length of the indication response message window and/or the subcarrier spacing information of the random access response message, the window length of the response message window;

Receiving a response message from the network device according to the start time of the response message window and the window length of the response message window.

The method of embodiment 28, wherein the start time of the response message window is a time for transmitting a random access preamble plus a time of N time units, wherein N is greater than 1. An integer, where the time unit is a subframe, a time slot, a minislot, an OFDM symbol, or an absolute time.

30. A communication device, comprising:

a processing unit, configured to generate random access configuration information, where the random access configuration information includes at least one parameter: window length information indicating a response message window, a random access preamble format, and random access preamble sequence length information;

a sending unit, configured to send the random access configuration information to the terminal device;

The sending unit is further configured to send the response message to the terminal device.

31. A communication method, comprising:

Generating random access configuration information, where the random access configuration information includes at least one parameter: a window length indicating a response message window, a random access preamble format, and a random access preamble sequence length information;

Sending the random access configuration information to the terminal device;

Sending a response message to the terminal device.

For the explanation and beneficial effects of the related content in any of the above-mentioned communication devices, reference may be made to the corresponding method embodiments provided above, and details are not described herein again. Those of ordinary skill in the art will 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 or a combination of computer software and electronic hardware. 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 to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or may be each Units exist physically alone, or two or more units can be integrated into one unit.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions (programs or code). When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in or transmitted by a computer readable storage medium. The computer instructions may be from a website site, computer, server or data center via a wired (eg, coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) Another website site, computer, server, or data center for transmission. The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)). )Wait.

One of ordinary skill in the art can understand all or part of the process of implementing the above embodiments, which can be completed by a computer program to instruct related hardware, the program can be stored in a computer readable storage medium, when the program is executed The flow of the method embodiments as described above may be included. The foregoing storage medium includes: a read-only memory (ROM) or a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program code.

Claims (27)

A communication device, comprising: a receiving unit, configured to receive a response message from the network device at the first time T; a sending unit, configured to send a scheduling message to the network device after the delay time K of the first time T; Wherein the K is associated with the time indication information k1 or K is associated with the time indication information k1 and k2; wherein the k1 is located at the head of the Medium Access Control Protocol Data Unit MAC PDU of the response message, the k2 is located The load of the MAC PDU. The communication device of claim 1, wherein the communication device further comprises: The processing unit is configured to obtain random access configuration information, where the random access configuration information includes at least one of the following: a window length of the response message window and length information of the random access preamble sequence. The communication device according to claim 2, wherein said receiving unit is configured to: Receiving the response message according to a start time of the response message window, an offset time, and a window length of the response message window; or The response message is received according to a start time of the response message window and a window length of the response message window. The communication device of claim 2 wherein: The start time of the response message window is related to the random access preamble sequence length information; The window length of the response message window is related to the subcarrier spacing of the random access preamble or random access response. A communication method, comprising: Receiving a response message from the network device at the first time T; Sending a scheduling message to the network device after the delay time K of the first time T; Wherein the K is associated with the time indication information k1 or K is associated with the time indication information k1 and k2; wherein the k1 is located at the head of the Medium Access Control Protocol Data Unit MAC PDU of the response message, the k2 is located The load of the MAC PDU. The method of claim 5, wherein the method further comprises: before the receiving the response from the network device at the first time T, the method further comprising: Obtaining random access configuration information, where the random access configuration information includes at least one of: a window length of the response message window and a random access preamble sequence length information. The method of claim 6, wherein the receiving the response message from the network device at the first time T comprises: Receiving the response message according to a start time of the response message window, an offset time, and a window length of the response message window; or The response message is received according to a start time of the response message window and a window length of the response message window. The method of claim 6 wherein: The start time of the response message window is related to the random access preamble sequence length information; The window length of the response message window is related to the subcarrier spacing of the random access preamble or random access response. A communication device, comprising: a sending unit, configured to send a response message to the terminal device at the first time T, where the head of the media access control protocol data unit MAC PDU of the response message includes time indication information k1; The receiving unit is further configured to receive a scheduling message that is sent by the terminal device after the delay time K of the first time T, Wherein the K is related to the time indication information k1; or a sending unit, configured to send a response message to the terminal device at the first time T, where a header of the media access control protocol data unit MAC PDU of the response message includes time indication information k1, and a load of the MAC PDU Including time indication information k2; The receiving unit is further configured to receive a scheduling message that is sent by the terminal device after the delay time K of the first time T, where the K is related to the time indication information k1 and k2. The communication apparatus according to claim 9, wherein said k1 and k2 are constant, or said k1 and k2 are determined according to at least one of the following parameters: said at least one parameter comprising: bandwidth, subcarrier spacing, frame Structure, random access preamble format, random access preamble sequence length, carrier frequency, and service type. The communication device of claim 9 or 10, further comprising: And a processing unit, configured to generate random access configuration information, where the random access configuration information includes at least one parameter: information indicating a window length of the random access response response message window, a random access preamble format, and a random access preamble sequence Length information The communication unit is further configured to send the random access configuration information. A communication method, comprising: Sending a response message to the terminal device at the first time T, wherein the header of the medium access control protocol data unit MAC PDU of the response message includes time indication information k1; Receiving, by the terminal device, a scheduling message sent after the delay time K of the first time T, wherein the K is related to the time indication information k1; or Sending a response message to the terminal device at the first time T, where the header of the medium access control protocol data unit MAC PDU of the response message includes time indication information k1, and the load of the MAC PDU includes time indication information k2 ; Receiving, by the terminal device, a scheduling message sent after the delay time K of the first time T, wherein the K is related to the time indication information k1 and k2. The method according to claim 12, wherein the k1, k2 are constant, or the k1, k2 are determined according to at least one parameter, the at least one parameter comprising: bandwidth, subcarrier spacing, frame structure , random access preamble format, random access preamble sequence length, and service type. The method according to claim 12 or 13, wherein before the sending the response message to the terminal device at the first time T, the method further includes: Generating random access configuration information, where the random access configuration information includes at least one parameter: window length information indicating a response message window, a random access preamble format, and random access preamble sequence length information; Sending the random access configuration information. The method according to any one of claims 1, 5, 9 or 12, wherein the k1 is located in a MAC subheader for indicating backoff information; or the k1 is located in any MAC subheader In the field. The method according to any one of claims 1, 5, 9 or 12, wherein the k2 is located in an uplink grant UL grant field in the payload, and/or the k2 is located in the preload of the load Stay in place. The method according to any one of claims 1, 5, 9 or 12, wherein said k1 occupies 1-3 bits. A method of determining a response message window includes: The network device determines a response message window length and/or a response message window start time according to the subcarrier spacing, and according to the ringing The response message shall be sent to the terminal device in response to the message window length and/or in response to the message window start time. The method of claim 18, the determining, by the network device, the response message window length according to the subcarrier spacing comprises: The network device determines the response message window length according to the initial response message window length and the subcarrier spacing; The method further includes the network device transmitting the initial response message window length to the terminal device. The method according to claim 18 or 19, wherein the subcarrier spacing is a subcarrier spacing of at least one of the following signals or channels: physical broadcast channel PBCH, residual system information RMSI, random access response, random access preamble, Message 3. A method of determining a response message window includes: The terminal device determines the response message window length and/or the response message window start time according to the subcarrier interval, and receives the response message sent by the network device according to the response message window length and/or the response message window start time. The method according to claim 21, wherein the determining, by the terminal device, the response message window length according to the subcarrier spacing comprises: The terminal device receives an initial response message window length sent by the network device, and determines a response message window length according to the initial response message window length and the subcarrier interval. The method according to claim 21 or 22, wherein the subcarrier spacing is a subcarrier spacing of at least one of the following signals or channels: physical broadcast channel PBCH, residual system information RMSI, random access response, random access preamble, Message 3. A network device, including: Processing module: configured to determine a response message window length and/or a response message window start time according to the subcarrier spacing; The sending module is configured to send a response message to the terminal device according to the response message window length and/or the response message window start time. The network device of claim 24, wherein the processing module is specifically configured to determine a response message window length according to an initial response message window length and the subcarrier spacing. A terminal device comprising: Processing module: configured to determine a response message window length and/or a response message window start time according to the subcarrier spacing; The sending module is configured to receive a response message sent by the network device according to the response message window length and/or the response message window start time. The terminal device of claim 26, further comprising: The receiving module is configured to receive an initial response message window length delivered by the network device. The processing module is further configured to determine a response message window length according to the initial response message window length and the subcarrier spacing.

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