Data transmission method and device

Abstract

The present disclosure provides a method and device for data transmission. The method includes: triggering data transmission by a user equipment based on a preset condition being satisfied; confirming the type of data transmission by the user equipment based on first information; and performing data transmission of the confirmed type by the user equipment, wherein the type of data transmission includes: a first type as a four-step random access; a second type as a two-step random access; and a third type as a pre-configured uplink resource transmission.

Description

Technical Field

[0001] The present disclosure relates to the field of wireless communications, and more specifically, to a method and device for transmitting small packet data. Background Art

[0002] The transmission in the wireless communication system includes: the transmission from the base station (gNB) to the user equipment (UE, User Equipment) (called downlink transmission), and the corresponding time slot is called the downlink time slot; the transmission from the UE to the base station (called uplink transmission), and the corresponding time slot is called the uplink time slot.

[0003] In the downlink communication of the wireless communication system, the system periodically sends the synchronization signal and the broadcast channel to the user through the synchronization signal block (SSB, synchronization signal / PBCH block). This period is the synchronization signal block period (SSB periodicity, SSB period), or called the synchronization signal block group period (SSB burst periodicity). At the same time, the base station will configure a random access configuration period (Physical random access channel configuration period, PRACH configuration period), configure a certain number of random access transmission opportunities (also called random access opportunities, PRACH transmission occasion, RO) during this period, and satisfy that all SSBs can be mapped to the corresponding RO within the mapping period (mapping period) (a certain length of time).

[0004] In some communication systems (licensed spectrum and / or unlicensed spectrum), some user equipment only needs to send data packets with a certain amount of data at certain times. In order to achieve faster signal transmission and reception, if the traditional method is used, four steps of random access are required to access the system, and then request resources from the system, and then perform data transmission and other operations. If there are many small packet services, it will cause a lot of signaling resources. Waste. Therefore, how to effectively send small packet data is a problem that needs to be solved. Summary of the invention

[0005] Various aspects of the present disclosure are to solve at least the above-mentioned problems and / or disadvantages, and provide at least the following advantages. Therefore, various aspects of the present disclosure provide a method for sending packet data, by which a user equipment determines the type of packet data transmission based on specific information and adopts the determined type for packet transmission, thereby reducing signaling overhead and effectively sending packet data.

[0006] According to one aspect of the present disclosure, a method for sending packet data includes: a user equipment triggers data transmission based on a preset condition being satisfied; confirms the type of data transmission based on first information; and performs data transmission of the confirmed type, wherein the type of data transmission includes one of the following: a first type as a four-step random access; a second type as a two-step random access; and a third type as a pre-configured uplink resource transmission.

[0007] According to one aspect of the present disclosure, the preset conditions include at least one of the following: the user equipment does not have uplink resources for sending scheduling request information; the amount of data to be sent by the user equipment is not greater than a predetermined threshold value configured by the base station or pre-set; the amount of data to be sent by the user equipment is not greater than the maximum amount of data allowable in the resources configured by the base station; a random access trigger event occurs; and the base station directly instructs data transmission through downlink control signaling and / or high-layer signaling.

[0008] According to one aspect of the present disclosure, the first information includes at least one of the following: priority of the data service, quality of the service, delay requirement, and downlink measurement result.

[0009] According to one aspect of the present disclosure, confirming the type of packet data transmission by a user device based on the first information includes: when the first information is not less than a first threshold value configured or pre-set by the base station, the user device determines the type of packet data transmission as the third type; and when the first information is less than a first threshold value configured or pre-set by the base station, the user device determines the type of packet data transmission as the first type or the second type.

[0010] According to one aspect of the present disclosure, when the first information is less than a first threshold value configured or pre-set by the base station, the user device confirms the type of packet data transmission based on the first information further includes: when the first information is not less than a second threshold value configured or pre-set by the base station, the user device determines the type of packet data transmission as the second type; and when the first information is less than the second threshold value configured or pre-set by the base station, the user device determines the type of packet data transmission as the first type.

[0011] According to one aspect of the present disclosure, when the type of data transmission is the third type, executing the confirmed type of data transmission includes the following: the network configures the configuration information of the reserved uplink resources configured through downlink control information and / or high-level signaling to determine the available reserved uplink resources; the user equipment executes the transmission of the uplink data; and after sending the uplink data, the user equipment detects the feedback of the search base station.

[0012] According to one aspect of the present disclosure, the configuration information is user equipment specific or base station specific; and wherein, determining the available reserved uplink resources includes at least one of the following: determining the resource size for transmission of uplink data; determining at least one of the number of repeated transmissions, the frequency hopping pattern within the time slot, and the frequency modulation pattern between time slots; and setting a send counter and / or a power ramp counter.

[0013] According to one aspect of the present disclosure, the transmission of uplink data performed by a user equipment includes at least one of the following: confirming open-loop power control for transmit power; and confirming a sequence index for bit-level scrambling, wherein the sequence index includes one of the following: a demodulation reference signal resource index used and / or an uplink resource index used; or a cell ID.

[0014] According to one aspect of the present disclosure, after sending uplink data, the feedback of the searched base station detected by the user equipment includes at least one of the following: determining a control resource set and / or search space for searching for base station feedback; when the searched base station feedback includes a matching conflict resolution identifier, determining that the third type of data transmission is successful; and when the searched base station feedback does not include a matching conflict resolution identifier or the user equipment does not search for the base station feedback, determining that the third type of data transmission is unsuccessful, wherein the conflict resolution identifier is one of a wireless network temporary identifier exclusive to the user equipment, a UE identifier, a common control channel (CCCH), a demodulation reference signal resource index used, and / or an uplink resource index used.

[0015] According to one aspect of the present disclosure, determining a control resource set and / or a search space for searching for base station feedback includes: determining that a physical downlink control channel for searching for base station feedback is a physical downlink control channel whose cyclic redundancy check is encrypted using a wireless network temporary identifier exclusive to a user equipment; or determining that a physical downlink control channel for searching for base station feedback is a physical downlink control channel whose cyclic redundancy check is encrypted using a third type of wireless network temporary identifier.

[0016] According to one aspect of the present disclosure, when it is determined that the transmission of the third type of packet data is unsuccessful, the method includes: the user equipment retransmits the third type of data; and when the number of unsuccessful times reaches a fifth threshold value configured or pre-set by the base station, the user equipment switches the type of data transmission to the second type or the first type.

[0017] According to one aspect of the present disclosure, when the type of data transmission is the first type, performing the confirmed type of data transmission includes the following: the user equipment uses an uplink resource shared with or reserved for a random access resource to send a preamble sequence; detects a physical downlink control channel (PDDCH) whose cyclic redundancy check (CRC) is scrambled by a random access radio network temporary identifier (RA-RNTI) to determine an uplink permission; the user equipment performs uplink data transmission based on the determined uplink permission; and the user equipment receives a message from the base station to continue the uplink data transmission.

[0018] According to one aspect of the present disclosure, confirming the uplink grant includes detecting the uplink grant in one or more RARs included in the PDSCH scheduled by the PDCCH whose CRC is scrambled by the RA-RNTI, and calculating the RA-RNTI includes one of the following: adding the preamble index selected by the user equipment to the calculation of the wireless network temporary identification; adding whether it is data transmission to the calculation of the wireless network temporary identification; and using the wireless network temporary identification dedicated to the user equipment configured by the base station.

[0019] According to one aspect of the present disclosure, confirming an uplink grant includes detecting one or more uplink grants contained in a PDCCH whose CRC is scrambled by RA-RNTI and selecting, by a user equipment, one of the following: an uplink grant whose time starting point of the uplink resource indicated in the uplink grant is closest to a time point when the uplink grant is received; an uplink grant that is closest to an amount of data to be sent by the user equipment; an uplink grant that is the smallest that is larger than an amount of data to be sent by the user equipment; and randomly selecting one of the one or more uplink grants with equal probability.

[0020] According to one aspect of the present disclosure, the reserved uplink resource is a random access resource configured by the base station for indicating dedicated data transmission.

[0021] According to an aspect of the present disclosure, the message received by the user equipment from the base station includes: a contention resolution message, an acknowledgement (ACK) message, or uplink scheduling of a physical downlink control channel.

[0022] According to one aspect of the present disclosure, a user equipment (UE) for receiving system information is provided, comprising: a transceiver for receiving signals from a base station and sending signals to the base station; a memory for storing executable instructions; and a processor for executing the stored instructions to execute the above method. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0024] Figure 1An example diagram of a contention-based random access process is shown;

[0025] Figure 2 An example diagram of a non-contention based random access procedure is shown;

[0026] Figure 3 A flow chart for determining the type of data transmission according to an embodiment of the present disclosure is shown;

[0027] Figure 4 A flow chart showing a third type of data transmission performed by a user equipment according to an embodiment of the present disclosure;

[0028] Figure 5A and Figure 5B A flow chart showing a first type of data transmission performed by a user equipment according to an embodiment of the present disclosure; and

[0029] Figure 6 A block diagram of a user equipment according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0030] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0031] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present disclosure refers to the presence of the features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may also be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items. In addition, the terms "first" and "second" used herein may describe various constituent elements, but they should not limit the corresponding constituent elements.

[0032] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the field to which the present disclosure belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0033] It will be understood by those skilled in the art that the "terminal" and "terminal device" used herein include both devices with wireless signal receivers, which are devices with only wireless signal receivers without transmission capabilities, and devices with receiving and transmitting hardware, which are devices with receiving and transmitting hardware capable of performing two-way communication on a two-way communication link. Such devices may include: cellular or other communication devices, which have a single-line display or a multi-line display or a cellular or other communication device without a multi-line display; PCS (Personal Communications Service), which may combine voice, data processing, fax and / or data communication capabilities; PDA (Personal Digital Assistant), which may include a radio frequency receiver, a pager, Internet / intranet access, a web browser, a notepad, a calendar and / or a GPS (Global Positioning System) receiver; conventional laptop and / or palmtop computers or other devices, which have and / or include a conventional laptop and / or palmtop computer or other device with a radio frequency receiver. The "terminal" or "terminal device" used herein may be portable, transportable, installed in a vehicle (air, sea and / or land), or adapted and / or configured to operate locally, and / or in a distributed form, at any other location on the earth and / or in space. The "terminal" or "terminal device" used herein may also be a communication terminal, an Internet terminal, a music / video playing terminal, such as a PDA, a MID (Mobile Internet Device) and / or a mobile phone with a music / video playing function, or a smart TV, a set-top box and other devices.

[0034] The time domain unit (also called time unit) in the present disclosure may be: an OFDM symbol, an OFDM symbol group (consisting of multiple OFDM symbols), a time slot, a time slot group (consisting of multiple time slots), a subframe, a subframe group (consisting of multiple subframes), a system frame, a system frame group (consisting of multiple system frames); it may also be an absolute time unit, such as 1 millisecond, 1 second, etc. The time unit may also be a combination of multiple granularities, such as N1 time slots plus N2 OFDM symbols.

[0035] The frequency domain unit in the present disclosure may be: a subcarrier, a subcarrier group (consisting of multiple subcarriers), a resource block (RB), which may also be called a physical resource block (PRB), a resource block group (consisting of multiple RBs), a bandwidth part (BWP), a band part group (consisting of multiple BWPs), a band / carrier, a band group / carrier group; it may also be an absolute frequency domain unit, such as 1 Hz, 1 kHz, etc. The frequency domain unit may also be a combination of multiple granularities, such as M1 PRBs plus M2 subcarriers.

[0036] In the New Radio (NR) communication system, before the establishment of radio resource control, such as during the random access process, the performance of random access directly affects the user experience. In traditional wireless communication systems, such as LTE and LTE-Advanced, the random access process is applied to multiple scenarios such as establishing an initial link, cell switching, reestablishing an uplink link, and reestablishing an RRC connection, and is divided into contention-based random access and non-contention-based random access according to whether the user has exclusive preamble resources. Because in contention-based random access, each user selects a preamble sequence from the same preamble sequence resource in the process of trying to establish an uplink link, multiple users may select the same preamble sequence to send to the base station. Therefore, the conflict resolution mechanism is an important research direction in random access. How to reduce the probability of conflict and how to quickly resolve conflicts that have occurred are key indicators that affect random access performance.

[0037] The contention-based random access process in LTE-A is divided into four steps, such as Figure 1As shown. In the first step, the user randomly selects a preamble sequence from the preamble sequence resource pool and sends it to the base station. The base station performs correlation detection on the received signal to identify the preamble sequence sent by the user; in the second step, the base station sends a random access response (RAR) to the user, including a random access preamble sequence identifier, a timing advance instruction determined according to the delay estimation between the user and the base station, a temporary cell radio network temporary identifier (Cell-Radio Network Temporary Identifier, C-RNTI) and the time-frequency resources allocated for the user's next uplink transmission; in the third step, the user sends the third message (Msg3) to the base station based on the information in the RAR. Msg3 contains information such as the user terminal identifier and the RRC connection request, wherein the user terminal identifier is unique to the user and is used to resolve conflicts; in the fourth step, the base station sends a conflict resolution identifier to the user, including the user terminal identifier that wins the conflict resolution. After detecting its own identifier, the user upgrades the temporary C-RNTI to C-RNTI, sends an ACK signal to the base station, completes the random access process, and waits for the base station to schedule. Otherwise, the user will start a new random access process after a delay.

[0038] For the non-contention-based random access process, since the base station knows the user identity, it can allocate a preamble sequence to the user. Therefore, when the user sends the preamble sequence, it does not need to randomly select a sequence, but will use the allocated preamble sequence. After detecting the allocated preamble sequence, the base station will send a corresponding random access response, including information such as timing advance and uplink resource allocation. After receiving the random access response, the user believes that the uplink synchronization has been completed and waits for further scheduling by the base station. Therefore, the non-contention-based random access process only includes two steps: step one is to send the preamble sequence; step two is to send the random access response.

[0039] The random access procedure in LTE is applicable to the following scenarios:

[0040] 1. Initial access under RRC_IDLE;

[0041] 2. Re-establish the RRC connection;

[0042] 3. Cell switching;

[0043] 4. Downlink data arrives in RRC connected state and requests random access process (when uplink is asynchronous);

[0044] 5. Uplink data arrives in RRC connected state and requests random access procedure (when uplink is asynchronous or no resources are allocated to the scheduling request in PUCCH resources); and

[0045] 6. Positioning.

[0046] In order to make the objectives, technical means and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0047] The method for effectively sending data will be described in detail below with reference to the accompanying drawings.

[0048] Figure 1 An example diagram of a contention-based random access process is shown; Figure 2 An example diagram showing a non-contention based random access procedure and Figure 3 A flow chart for determining the type of data transmission according to an embodiment of the present disclosure is shown.

[0049] like Figure 3 As shown, when the user equipment (UE) finds that at least one of the following conditions is met, data transmission is triggered (i.e., the determination of the subsequent data transmission type is triggered):

[0050] - The user equipment does not have uplink resources (eg uplink control channel resources) for sending scheduling request information;

[0051] - If the amount of data to be sent by the user equipment (e.g., the size of data in the buffer, or the number of bits of data information to be sent) is less than or not greater than a predetermined threshold value configured or preset by a base station (or the maximum amount of data allowed in the resources configured by the base station);

[0052] -When other existing random access triggering events occur;

[0053] - When the base station directly instructs data transmission through downlink control signaling and / or higher layer signaling.

[0054] like Figure 3 As shown, after triggering data transmission, the data transmission type is determined. The data transmission type includes at least one of the following: a first type, four-step random access; a second type, two-step random access; a third type, pre-configured uplink resource transmission. Additionally, the data transmission type may be a combination of one or more of the first type, four-step random access; a second type, two-step random access; and a third type, pre-configured uplink resource transmission, and when there are multiple data transmission types, one of them may be selected as the confirmed type.

[0055] Specifically, the confirmation of the type of data transmission includes: judging based on the situation of information X, and the information X can be at least one of the following: priority of data service, quality of service, delay requirement, downlink measurement result (reference signal received power, RSRP) and / or (reference information received quality, RSRQ). When the information X is greater than (not less than) a first threshold value preset or configured by the network, the UE determines to use the third type for data transmission; otherwise, the UE determines to use the second type or the first type for service transmission, or further determines in the second type and the first type, and then when the information X is greater than (not less than) a second threshold value preset or configured by the network, the UE determines to perform the second type of data transmission; otherwise, the UE determines to perform the first type of data transmission. The two pieces of information X used to compare the first threshold value and the second threshold value may be the same or different.

[0056] Preferably, the information X may also be the cell size supported by the base station (for example, by different preamble formats), and / or the validity of the timing advance information of the UE, for example, when the supported cell size is less than (not greater than) a third threshold value preset or configured by the network, and / or the configured preamble format is one of one or more predefined ones, and / or the UE timing advance value is valid (the timing advance timer is still running), the UE determines to perform the third type of data transmission, otherwise the UE determines to use the second type or the first type for service transmission, or further determines in the second type and the first type, and then when the information X is greater than (not less than) a fourth threshold value preset or configured by the network, the UE determines to perform the second type of data transmission; otherwise, the UE determines to perform the first type of data transmission. The two pieces of information X used to compare the third threshold value and the fourth threshold value may be the same or different.

[0057] Combination of the above Figure 3 It is described how to determine the type of data transmission based on information X. By determining the type of data transmission, different types of transmission can be performed respectively, thereby reducing signaling overhead and efficiently sending data.

[0058] Figure 4 FIG. 1 is a flow chart showing a third type of data transmission performed by a user equipment according to an embodiment of the present disclosure. Figure 4 The operations performed when the UE determines to perform the third type of data transmission are described in detail.

[0059] Specifically, when the UE determines to perform the third type of data transmission, at least one of the following operations is performed:

[0060] - Determine the available reserved uplink resources based on the configuration information of the reserved uplink resources configured by the network (through downlink control information and / or high-level signaling), wherein the configuration information may be UE-specific or network-specific. Further, determining the available reserved uplink resources includes at least one of the following: determining the resource size for transmitting the uplink resources (including at least one of the following: the number of OFDM symbols, the number of PRBs, and the resource configuration of the demodulation reference signal), wherein the resource configuration of the demodulation reference signal includes: scrambling index, port configuration index, number of DMRS symbols, position, etc.; the number of repeated transmissions, and / or the frequency hopping pattern within the time slot, and / or the frequency hopping pattern between time slots; setting a transmission counter and / or a power increase counter.

[0061] - performing uplink data transmission, including at least one of the following: confirmation of transmit power: using open-loop power control; the sequence index used for bit-level scrambling may be: the used DMRS resource index and / or the used uplink resource index, or the cell ID (when the base station is not configured with other sequence indexes);

[0062] -After sending the uplink data, detecting and searching for the feedback of the base station, including at least one of the following:

[0063] Determine the control resource set and / or search space used to search for base station feedback, including: the PDCCH searched by the UE has its CRC scrambled using a UE-specific RNTI, for example, when the transmitted uplink data includes a UE-specific RNTI, such as C-RNTI; or the PDCCH searched by the UE has its CRC scrambled using a third type of RNTI, for example, when the transmitted uplink data includes CCCH, such as S-TMSI.

[0064] When a matching conflict resolution identifier is included in the feedback of the searched base station (by PDCCH and / or PDSCH), the third type of uplink transmission is successful, wherein the conflict resolution identifier may be a UE-specific RNTI, a UE identifier, a CCCH, a used DMRS resource index, or an uplink resource index;

[0065] When the feedback from the searched base station does not include a matching conflict resolution identifier, or the UE does not search for feedback from the base station, it indicates that the above-mentioned third type of data transmission of the UE is unsuccessful, and the UE can continue to retransmit the third type of message data. If the number of unsuccessful attempts of the UE reaches a threshold value N times preset or configured by the base station, the UE switches to the second type or first type of data transmission, or further determines between the second type and the first type, and the determination method is as described above.

[0066] Combination of the above Figure 4The transmission process of the third type of data according to an embodiment of the present disclosure is described. By adopting the third type of transmission, signaling overhead is reduced and data is sent efficiently.

[0067] Figure 5A and Figure 5B FIG. 4 is a flowchart of a first type of packet data transmission performed by a user equipment according to an embodiment of the present disclosure. Figure 5A and Figure 5B , combined with Figure 1 The operations performed when the UE determines to perform first type data transmission are described in detail.

[0068] Specifically, when the UE determines to perform the first type (four-step random access), the following operations are performed:

[0069] In the first step, the UE sends a preamble. There are two possible ways: Method 1), fully sharing or partially sharing the random access resources with the random access resources; Method 2), selecting the random access resources (including random access time-frequency resources and / or preambles) configured by the base station specifically for indicating data transmission, also known as reserved uplink resources, that is, the base station detects that the preamble is from the random access resources configured specifically for indicating data transmission, then the base station can know that the UE sending the preamble needs to transmit data; this allows the base station to better configure uplink resources in the feedback.

[0070] In the second step, the UE receives feedback from the base station. The first method is used to perform reception: detect the PDCCH with CRC scrambled by RA-RNTI. PDDCH schedules a PDSCH (including one or more RARs), and a single RAR corresponding to each RAPID (random access preamble index) may include an uplink grant (UL grant). A new RA-RNTI design can be adopted for data transmission, such as: adding the preamble index selected by the UE to the calculation of the new RA-RNTI; adding the calculation of whether it is data transmission, for example, if it is data transmission, then RA-RNTI+1, if not data transmission, then RA_RNTI+0, that is, unchanged; and using the UE-specific RNTI configured by the base station, but the RNTIs of different UEs may be the same, depending on the configuration of the base station. In addition, the newly configured CORESET or search space can also be used for feedback from the receiving station.

[0071] On the other hand, the second method is used to perform reception: detect the PDCCH with CRC scrambled by RA-RNTI, where the PDCCH contains (timing advance) TA, one or more UL grants. Different from the preamble code transmission using random access resources, the UE does not resolve the conflict at this time, and directly obtains the UL grant through PDCCH scheduling; so multiple UEs may obtain this UL grant. When there are multiple UL grants, the multiple UL grants may be: completely independent UL grants; there are some shared parameter configurations, such as the size of time-frequency resources, but there are some independent parameter configurations, such as different UL grants, There are different numbers of time-frequency resources, for example, a single time-frequency resource is N time units, M frequency domain units, but the first UL grant has X such time-frequency resources; the second UL grant has Y such time-frequency resources.

[0072] For the above one or more UL grants, the UE selects one of the following: a. the most recent UL grant; b. the UL grant closest to the amount of data to be sent by the user equipment; c. the smallest UL grant selected by the user equipment that is larger than the amount of data to be sent by the user equipment; d. randomly selecting a UL grant with equal probability.

[0073] In the second step, after receiving the feedback from the base station, the UE performs data transmission according to the determined (configured or selected) ul grant; if no feedback is received, or correct feedback is not received (for example, the PDCCH of the RARNTI is searched, but the RAPID does not match), the UE returns to the first step to resend the preamble code.

[0074] In the third step, the UE performs data transmission according to the determined (configured or selected) UL grant. If the conflict has not been resolved before (for example, the traditional method is used), the third message (msg3) may carry the UE ID; if the conflict has been resolved before (for example, the UE-specific RNTI is used), the third message may not carry the UE ID.

[0075] In the fourth step, the UE receives a conflict resolution message, or receives an ACK from the base station, and / or uplink scheduling of the PDCCH and continues UL transmission.

[0076] Combination of the above Figure 5A and Figure 5B The transmission process of the first type of data according to an embodiment of the present disclosure is described. By adopting the first type of transmission, signaling overhead is reduced and data is sent efficiently.

[0077] Figure 6is a block diagram illustrating a UE according to an embodiment of the present disclosure.

[0078] refer to Figure 6 UE (600) includes a transceiver (601), a processor (602) and a memory (603). The transceiver (601), the processor (602) and the memory (603) are configured to perform the operations shown in the figure (for example, Figure 3 To Figure 5) or the operation of the UE described above.

[0079] pass Figure 6 The operation of the UE shown can reduce signaling overhead and transmit data efficiently.

[0080] "User Equipment" or "UE" herein may refer to any terminal with wireless communication capabilities, including but not limited to mobile phones, cellular phones, smart phones or personal digital assistants (PDAs), portable computers, image capture devices such as digital cameras, gaming devices, music storage and playback devices, and any portable unit or terminal with wireless communication capabilities, or Internet facilities that allow wireless Internet access and browsing, etc.

[0081] The term "base station" (BS) or "network equipment" used in this document may refer to eNB, eNodeB, NodeB or base transceiver station (BTS) or gNB, etc., depending on the technology and terminology used.

[0082] The "memory" here can be of any type suitable for the technical environment of this article and can be implemented using any suitable data storage technology, including but not limited to semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.

[0083] The “processor” here may be of any type suitable for the technical environment of this article, including but not limited to one or more of the following: a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor DSP, and a processor based on a multi-core processor architecture.

[0084] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

[0085] It will be appreciated by those skilled in the art that the present disclosure includes devices for performing one or more of the operations described in the present disclosure. These devices may be specially designed and manufactured for the desired purpose, or may include known devices in general-purpose computers. These devices have computer programs stored therein, which are selectively activated or reconstructed. Such computer programs may be stored in a device (e.g., computer) readable medium or in any type of medium suitable for storing electronic instructions and coupled to a bus, respectively, the computer readable medium including but not limited to any type of disk (including floppy disk, hard disk, optical disk, CD-ROM, and magneto-optical disk), ROM (Read-Only Memory), RAM (Random Access Memory), EPROM (Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash memory, magnetic card or optical card. That is, the readable medium includes any medium that stores or transmits information in a readable form by a device (e.g., computer).

[0086] Those skilled in the art will appreciate that each block in these structure diagrams and / or block diagrams and / or flow charts and combinations of blocks in these structure diagrams and / or block diagrams and / or flow charts can be implemented using computer program instructions. Those skilled in the art will appreciate that these computer program instructions can be provided to a general-purpose computer, a professional computer, or a processor of other programmable data processing methods to implement, thereby executing the scheme specified in the block or multiple blocks of the structure diagrams and / or block diagrams and / or flow charts disclosed in the present disclosure through the processor of the computer or other programmable data processing method.

[0087] Those skilled in the art will appreciate that the various operations, methods, steps, measures, and schemes discussed in the present disclosure may be alternated, altered, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in the present disclosure may also be alternated, altered, rearranged, decomposed, combined, or deleted. Furthermore, the steps, measures, and schemes in the prior art that are similar to those disclosed in the present disclosure may also be alternated, altered, rearranged, decomposed, combined, or deleted.

[0088] The above description is only a partial implementation mode of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present disclosure. These improvements and modifications should also be regarded as the protection scope of the present disclosure.

Claims

1. A method performed by a user equipment in a wireless communication system, include: When the preset conditions are met, the data transmission of the small packet is triggered; Determining the type of the packet data transmission; as well as performing the packet data transmission by the determined type, The type of the packet data transmission includes at least one of the following: a first type based on four-step random access; a second type based on two-step random access; and a third type based on preconfigured uplink resource transmission. The preset condition includes: the amount of uplink data to be sent by the user equipment is less than or equal to a first threshold value.

2. The method according to claim 1, in, When the downlink reference signal received power is greater than the second threshold value, the type of the packet data transmission is determined to be the third type.

3. The method according to claim 1, in, When the type of the packet data transmission is the third type, the method further includes: receiving configuration information for pre-configured uplink resource transmission; The performing of the packet data transmission by the determined type includes: performing a third type of packet data transmission on the uplink resources configured by the configuration information.

4. The method according to claim 3, in, Also includes: After performing the third type of packet data transmission, feedback from the base station is detected.

5. The method according to claim 3, in, The configuration information is user equipment specific or base station specific.

6. The method according to claim 3, in, The determination of the uplink resource includes at least one of the following: Determining a resource size for transmission of uplink data; determining at least one of a number of repeated transmissions, a frequency hopping pattern within a time slot, and a frequency hopping pattern between time slots; and Set the transmit counter and / or power ramp counter.

7. The method according to claim 3, in, Executing the packet data transmission includes at least one of the following: determining an open loop power control for transmit power; and Determine a sequence index for bit-level scrambling, wherein the sequence index includes at least one of the following: the demodulation reference signal resource index used and / or the uplink resource index used; or Cell ID.

8. The method according to claim 4, in, Detecting feedback from the base station includes: A physical downlink control channel having a cyclic redundancy check is detected, wherein the cyclic redundancy check is scrambled by a radio network temporary identifier that is specific to the user equipment.

9. The method according to claim 4, in, When the detected base station feedback includes a matching conflict resolution identifier, determining that the third type of packet data transmission is successful; and When the detected base station feedback does not include a matching conflict resolution identifier or the user equipment fails to search for the base station feedback, it is determined that the transmission of the third type of packet data is unsuccessful, The conflict resolution identifier includes at least one of a wireless network temporary identifier dedicated to the user equipment UE, a UE identifier, a common control channel (CCCH), a demodulation reference signal resource index used, and / or a used uplink resource index.

10. The method according to claim 3, in, The configuration information is received via downlink control information and / or high-layer signaling.

11. The method according to claim 9, in, When it is determined that the data transmission of the third type of packet is unsuccessful, the method further includes: performing a third type of packet data retransmission; and When the number of unsuccessful times reaches a fifth threshold value configured or preset by the base station, the user equipment switches the type of packet data transmission to the second type or the first type.

12. The method according to claim 1, in, When the type of the packet data transmission is the first type, performing the packet data transmission according to the determined type includes at least one of the following: Using uplink resources shared with random access resources or reserved to send a preamble sequence; Detecting a physical downlink control channel (PDDCH) whose cyclic redundancy check (CRC) is scrambled by a random access radio network temporary identifier (RA-RNTI) to determine an uplink grant; Performing uplink transmission of small packet data based on the determined uplink grant; as well as Receive a message from the base station to continue uplink transmission of small packet data.

13. The method according to claim 12, in, Determining the uplink grant includes detecting an uplink grant in one or more RARs included in a PDSCH scheduled by a PDCCH whose CRC is scrambled by the RA-RNTI, and calculating the RA-RNTI includes at least one of the following: Adding the preamble index selected by the user equipment to the calculation of the wireless network temporary identifier; Whether it is a small packet data transmission is added to the calculation of the wireless network temporary identifier; as well as A wireless network temporary identifier that is exclusive to the user equipment and configured by the base station.

14. The method according to claim 12, in, Determining the uplink grant includes detecting one or more uplink grants included in the PDCCH whose CRC is scrambled by the RA-RNTI and selecting at least one of the following by the user equipment: The uplink grant whose time starting point of the uplink resource indicated in the uplink grant is closest to the time point of receiving the uplink grant; an uplink grant closest to the amount of data to be sent by the user equipment; A minimum uplink grant that is larger than the amount of data to be sent by the user equipment; as well as One of the one or more uplink grants is randomly selected with equal probability.

15. The method according to claim 12, in, The reserved uplink resource is a random access resource configured by the base station and used to indicate a dedicated small packet data transmission.

16. The method according to claim 12, in, The message received from the base station includes at least one of a conflict resolution message, an acknowledgement (ACK) message, or an uplink scheduling in a physical downlink control channel.

17. A user equipment in a wireless communication system, include: a transceiver configured to transmit and receive signals; A processor configured to control the transceiver to perform the method according to any one of claims 1 to 16.

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