CN112839378A

CN112839378A - Data transmission method and device

Info

Publication number: CN112839378A
Application number: CN201911168718.0A
Authority: CN
Inventors: 熊琦; 孙霏菲; 王轶; 喻斌
Original assignee: Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecom R&D Center; Beijing Samsung Telecommunications Technology Research Co Ltd; Samsung Electronics Co Ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2021-05-25

Abstract

The present disclosure provides a method and apparatus for data transmission. The method comprises the following steps: triggering, by the user equipment, a data transmission based on a preset condition being satisfied; confirming, by the user equipment, a type of data transmission based on the first information; and performing, by the user equipment, the acknowledged type of data transmission, wherein the type of data transmission comprises: as a first type of four-step random access; a second type which is a two-step random access; and a third type as a preconfigured uplink resource transmission.

Description

Data transmission method and device

Technical Field

The present disclosure relates to the field of wireless communications, and more particularly, to a method and apparatus for transmitting packet data.

Background

Transmissions in a wireless communication system include: transmission (referred to as downlink transmission) from a base station (gNB) to User Equipment (UE), and a corresponding timeslot is referred to as a downlink timeslot; the transmission from the UE to the base station (referred to as uplink transmission) and the corresponding time slot is referred to as uplink time slot.

In downlink communication in a wireless communication system, the system periodically transmits a synchronization signal and a broadcast channel to a user through a Synchronization Signal Block (SSB), which is an SSB period (SSB period) or referred to as an SSB burst period. Meanwhile, the base station configures a random access configuration period (PRACH configuration period), configures a certain number of random access transmission opportunities (also called random access opportunities, ROs) in the period, and satisfies that all SSBs can be mapped to corresponding ROs in a mapping period (certain time length).

In some communication systems (licensed spectrum and/or unlicensed spectrum), some user equipments only need to send data packets of a certain amount of data at some time, and in order to realize faster signal sending and receiving, if a conventional method is used, four-step random access is needed to perform system access, then a resource request is performed on the system, and operations such as data sending and the like are performed, and if a lot of packet services occur, a great waste of signaling resources is caused. Therefore, how to effectively transmit the packet data is a problem to be solved.

Disclosure of Invention

Aspects of the present disclosure are to address at least the above problems and/or disadvantages and to provide at least the advantages described below. Accordingly, aspects of the present disclosure provide a method for transmitting packet data, by determining a type of packet data transmission based on specific information by a user equipment and performing packet transmission in the determined type, thereby reducing signaling overhead and efficiently transmitting packet data.

According to an aspect of the present disclosure, a method for transmitting packet data, includes: the user equipment triggers data transmission based on preset conditions being met; confirming a type of data transmission based on the first information; and performing the acknowledged type of data transfer, wherein the type of data transfer comprises one of: as a first type of four-step random access; a second type which is a two-step random access; and a third type as a preconfigured uplink resource transmission.

According to an aspect of the disclosure, the preset condition includes at least one of: the user equipment does not have uplink resources for sending the scheduling request information; the data volume to be sent by the user equipment is not more than a preset threshold value configured or preset by the base station; the amount of data to be transmitted by the user equipment is not greater than the maximum allowable data amount size in the resources configured by the base station; a random access trigger event occurs; and directly indicating the data transmission by the base station through the downlink control signaling and/or the higher layer signaling.

According to an aspect of the disclosure, the first information includes at least one of: priority of data traffic, quality of traffic, delay requirements, and downlink measurements.

According to an aspect of the disclosure, confirming, by the user equipment, the type of the packet data transmission based on the first information includes: when the first information is not less than a first threshold value configured or preset by the base station, the user equipment determines the type of packet data transmission as a third type; and when the first information is smaller than a first threshold value configured or preset by the base station, the user equipment determines the type of the packet data transmission as a first type or a second type.

According to an aspect of the disclosure, when the first information is less than a first threshold value configured or preset by the base station, confirming, by the user equipment, the type of the packet data transmission based on the first information further comprises: when the first information is not less than a second threshold value configured or preset by the base station, the user equipment determines the type of the packet data transmission as a second type; and when the first information is smaller than a second threshold value configured or preset by the base station, the user equipment determines the type of the packet data transmission as a first type.

According to an aspect of the disclosure, when the type of the data transmission is the third type, performing the acknowledged type of the data transmission includes the following: determining available reserved uplink resources by configuring, by the network, the configuration information of the reserved uplink resources configured by the downlink control information and/or the high-level signaling; performing, by the user equipment, transmission of uplink data; and detecting, by the user equipment, feedback of searching for the base station after transmitting the uplink data.

According to an aspect of the disclosure, the configuration information is user equipment-specific or base station-specific; and wherein determining available reserved uplink resources comprises at least one of: determining a resource size for transmission of uplink data; determining at least one of the number of repeated transmissions, frequency hopping patterns in the time slot and frequency hopping patterns between time slots; and setting a transmit counter and/or a power ramp-up counter.

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

According to an aspect of the present disclosure, after transmitting uplink data, detecting, by the user equipment, feedback of searching for a base station includes at least one of: determining a control resource set and/or a search space for searching feedback of a base station; when the searched base station feedback comprises the matched conflict resolution identification, determining that the data transmission of the third type is successful; and determining that the third type of data transmission is unsuccessful when the searched base station feedback does not include a matching collision resolution identity or the user equipment does not search the base station feedback, wherein the collision resolution identity is one of a radio network temporary identity, a UE identity, a Common Control Channel (CCCH), a used demodulation reference signal resource index and/or a used uplink resource index specific to the user equipment.

According to an aspect of the disclosure, determining a set of control resources and/or a search space for searching for base station feedback comprises: determining that a physical downlink control channel for searching base station feedback is a physical downlink control channel of which cyclic redundancy check is scrambled by using a special wireless network temporary identifier of user equipment; or determining that the physical downlink control channel for searching the base station feedback is the physical downlink control channel of which the cyclic redundancy check is scrambled by using the third type of radio network temporary identity.

According to an aspect of the disclosure, when it is determined that the third type of packet data transmission is unsuccessful, the method comprises: the user equipment performs the third type of 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 data transmission to the second type or the first type.

According to an aspect of the present disclosure, when the type of the data transmission is the first type, performing the acknowledged type of the data transmission includes the following: the user equipment transmits a preamble sequence by using uplink resources shared with or reserved for the random access resources; 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, by the user equipment, uplink data transmission based on the determined uplink grant; and receiving, by the user equipment, a message from the base station to continue the data uplink transmission.

According to an aspect of the disclosure, confirming the uplink grant includes detecting the uplink grant in one or more RARs included in a PDCCH-scheduled PDSCH scrambled by the RA-RNTI with respect to its CRC, and calculating the RA-RNTI includes one of: adding a preamble index (preamble index) selected by the user equipment to the calculation of the radio network temporary identifier; adding data transmission into the calculation of the wireless network temporary identifier; and the exclusive radio network temporary identifier of the user equipment configured by the base station is adopted.

According to an aspect of the disclosure, confirming the uplink grant includes detecting one or more uplink grants included in a PDCCH on which a RA-RNTI is scrambled for a CRC and selecting, by the user equipment, one of: the uplink permission with the time starting point of the uplink resource indicated in the uplink permission being closest to the time point of receiving the uplink permission; an uplink grant closest to an amount of data to be transmitted by the user equipment; a minimum uplink grant greater than an amount of data to be transmitted by the user equipment; and equal probability randomly selecting one of the one or more uplink grants.

According to an aspect of the disclosure, the reserved uplink resource is a random access resource configured by a base station for indicating data transmission exclusive.

According to an aspect of the disclosure, receiving, by the user equipment, the message from the base station includes: one of a collision resolution message, an Acknowledgement (ACK) message, or uplink scheduling of a physical downlink control channel.

According to an aspect of the present disclosure, there is provided a User Equipment (UE) for receiving system information, including: a transceiver to receive a signal from a base station and to transmit a signal to the base station; a memory storing executable instructions; and a processor executing the stored instructions to perform the above-described method.

Drawings

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

fig. 1 shows a diagram of an example contention-based random access procedure;

fig. 2 illustrates an example diagram of a non-contention based random access procedure;

FIG. 3 illustrates a flow diagram for determining a type of data transmission in accordance with an embodiment of the present disclosure;

fig. 4 shows a flow diagram of a third type of data transmission performed by a user equipment according to an embodiment of the present disclosure;

fig. 5A and 5B illustrate a flow diagram of a first type of data transmission performed by a user equipment according to an embodiment of the present disclosure; and

fig. 6 shows a block diagram of a user equipment according to an embodiment of the present disclosure.

Detailed Description

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. It should be understood that the description is illustrative only and is not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items. Further, the terms "first" and "second" used herein may describe various constituent elements, but they should not limit the corresponding constituent elements.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As will be understood by those skilled in the art, the term "terminal" as used herein includes both devices having wireless signal receivers, and devices having only wireless signal receivers without transmission capability; and a device including receive and transmit hardware having receive and transmit hardware capable of two-way communication over a two-way communication link. Such a device may include: a cellular or other communication device having 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, facsimile and/or data communication capabilities; a 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; a conventional laptop and/or palmtop computer or other device having and/or including a radio frequency receiver. As used herein, a "terminal" or "terminal device" may be portable, transportable, installed in a vehicle (aeronautical, maritime, and/or land-based), or situated and/or configured to operate locally and/or in a distributed fashion at any other location(s) on earth and/or in space. As used herein, a "terminal Device" may also be a communication terminal, a web terminal, a music/video playing terminal, such as a PDA, an MID (Mobile Internet Device) and/or a Mobile phone with music/video playing function, or a smart tv, a set-top box, etc.

The time domain units (also called time units) in this disclosure may be: one OFDM symbol, one OFDM symbol group (composed of a plurality of OFDM symbols), one slot group (composed of a plurality of slots), one subframe group (composed of a plurality of subframes), one system frame group (composed of a plurality of system frames); absolute time units are also possible, such as 1 millisecond, 1 second, etc. The time unit may also be a combination of multiple granularities, e.g., N1 slots plus N2 OFDM symbols.

The frequency domain units in this disclosure may be: one subcarrier, one subcarrier group (consisting of a plurality of subcarriers), one Resource Block (RB), which may also be referred to as Physical Resource Block (PRB), one resource block group (consisting of a plurality of RBs), one band part (BWP), one band part group (consisting of a plurality of BWPs), one band/carrier, one band group/carrier group; or absolute frequency domain units such as 1 hz, 1 khz, etc. The frequency domain elements may also be a combination of multiple granularities, e.g., M1 PRBs plus M2 subcarriers.

In a New Radio (NR) communication system, the performance of random access directly affects the user experience before the establishment of Radio resource control, for example, during random access. In conventional wireless communication systems, such as LTE and LTE-Advanced, a Random Access procedure is applied to multiple scenarios, such as establishing an initial link, performing cell handover, re-establishing an uplink, and re-establishing an RRC connection, and is divided into Contention-based Random Access (Contention-based Random Access) and non-Contention-based Random Access (Contention-free Random Access) according to whether a user has exclusive use of a preamble sequence resource. In contention-based random access, in the process of trying to establish uplink, each user selects a preamble sequence from the same preamble sequence resource, and it may happen that a plurality of users select the same preamble sequence to send to a base station, so a collision resolution mechanism is an important research direction in random access, how to reduce collision probability and how to quickly resolve an occurred collision, and is a key index affecting random access performance.

The contention-based random access procedure in LTE-a is divided into four steps, as shown in fig. 1. In the first step, the user randomly selects a leader sequence from the leader sequence resource pool and sends the leader sequence to the base station. The base station carries out correlation detection on the received signal so as to identify a leader sequence sent by a user; in the second step, the base station sends a Random Access Response (RAR) to the user, wherein the RAR comprises a Random Access preamble sequence Identifier, a timing advance command determined according to time delay estimation between the user and the base station, a Temporary Cell Radio Network Temporary Identifier (C-RNTI) and a time-frequency resource allocated for the next uplink transmission of the user; in the third step, the user sends a third message (Msg3) to the base station according to the information in the RAR. The Msg3 includes information such as a user terminal identifier and an RRC connection request, wherein the user terminal identifier is unique for a user and is used for resolving a conflict; in the fourth step, the base station sends conflict resolution identification to the user, including the identification of the user terminal that wins the conflict resolution. And after detecting the own identity, the user upgrades the temporary C-RNTI into the C-RNTI and sends an ACK signal to the base station to finish the random access process and wait for the scheduling of the base station. Otherwise, the user will start a new random access procedure after a delay.

For a non-contention based random access procedure, since the base station knows the user identity, the user may be assigned a preamble sequence. Therefore, when the user sends the preamble sequence, the user does not need to randomly select the sequence, and the allocated preamble sequence is used. After detecting the allocated preamble sequence, the base station sends a corresponding random access response, including information such as timing advance and uplink resource allocation. And after receiving the random access response, the user considers that the uplink synchronization is finished and waits for the further scheduling of the base station. Therefore, the non-contention based random access procedure only comprises two steps: step one is to send a leader sequence; and step two, sending the random access response.

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

initial access under RRC _ IDLE;

2. reestablishing the RRC connection;

3. cell switching;

downlink data arrives and requests the random access process in the RRC connection state (when the uplink is in the asynchronous state);

when the uplink is in the asynchronous state or in PUCCH resources, resources are not allocated to the scheduling request; and

6. and (6) positioning.

For the purpose of making the objects, technical means and advantages of the present disclosure more apparent, the present disclosure will be described in further detail below with reference to the accompanying drawings and detailed description.

A method of efficiently transmitting data will be described in detail below with reference to the accompanying drawings.

Fig. 1 shows a diagram of an example contention-based random access procedure; fig. 2 shows an example diagram of a non-contention based random access procedure and fig. 3 shows a flow diagram of determining a type of data transmission according to an embodiment of the present disclosure.

As shown in fig. 3, data transmission is triggered when a User Equipment (UE) finds that at least one of the following conditions is fulfilled (i.e. a determination of a subsequent data transmission type is triggered):

the user equipment does not have uplink resources (e.g., uplink control channel resources) for transmitting the scheduling request information;

if the amount of data to be sent (e.g. the size of data in the buffer or the number of bits of data information to be sent) of the user equipment is smaller than or not larger than a predetermined threshold configured or preset by the base station (or the maximum allowable size of data amount in the resources configured by the base station);

-when other existing random access triggering events occur;

-indicating directly by the base station through downlink control signaling and/or higher layer signaling when data transmission is to take place.

As shown in fig. 3, after triggering the data transfer, it proceeds to the determination of the data transfer type. The type of data transmission includes at least one of: a first type, four-step random access; a second type, two-step random access; and a third type, pre-configuring uplink resource transmission. Additionally, the data transmission type may be a first type, four-step random access; a second type, two-step random access; and a third type, wherein one or more combinations of uplink resource transmission are pre-configured, and when multiple data transmission types exist, one of the data transmission types can be selected as the type of the confirmation.

Specifically, the confirmation of the type of data transmission includes: the determination is made based on the information X, which may be at least one of: priority of data traffic, quality of traffic, delay requirements, downlink measurement results (reference signal received power, RSRP) and/or (reference information received quality, RSRQ). When the information X is larger than (not smaller than) a first threshold value preset or configured by the network, the UE determines to use a third type for data transmission; otherwise, the UE determines to use the second type or the first type for service transmission, or further determines the second type and the first type, and then determines to transmit the second type of data when the information X is larger than (not smaller than) a second threshold value preset or configured by the network; 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.

Preferably, the information X may also be a cell size supported by the base station (for example, by a different preamble format), and/or validity of the timing advance information of the UE, for example, when the supported cell size is smaller than (not larger than) a third threshold preset or configured by the network, and/or the configured preamble format is one of one or more predefined, and/or the UE timing advance value is valid (the timing advance timer is also running), the UE determines to perform data transmission of the third type, otherwise the UE determines to use the second type or the first type for traffic transmission, or further determines in the second type and the first type, and then determines to perform data transmission of the second type according to the fact that the information X is larger than (not smaller than) a fourth threshold preset or configured by the network; 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.

It was described above in connection with fig. 3 how to determine the type of data transmission based on the information X, by which different types of transmission can be performed, respectively, thereby reducing signaling overhead and efficiently transmitting data.

Fig. 4 illustrates a flowchart of a third type of data transmission performed by a user equipment according to an embodiment of the present disclosure. Operations performed when the UE determines to perform the third type data transmission are described in detail with reference to fig. 4.

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

-determining available reserved uplink resources based on configuration information of reserved uplink resources configured by the network (by downlink control information and/or higher layer signaling), which may be UE-specific or network-specific. Further, determining available reserved uplink resources comprises at least one of: determining the resource size (at least comprising one of the number of OFDM symbols, the number of PRBs and the resource configuration of demodulation reference signals) for transmitting uplink resources, wherein the resource configuration of the demodulation reference signals comprises the following steps: scrambling indexes, port configuration indexes, DMRS symbol numbers, positions and the like; the number of times of repeated transmission, and/or frequency hopping patterns in time slots, and/or frequency hopping patterns between time slots; a transmit counter and/or a power up counter is set.

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

-after sending the uplink data, performing detection search on feedback of the base station, including at least one of:

determining a set of control resources and/or a search space for searching for base station feedback, comprising: the PDCCH searched by the UE is scrambled by using the RNTI specific to the UE for CRC, for example, when the uplink data to be transmitted includes the RNTI specific to the UE, such as C-RNTI; or the PDCCH searched by the UE is scrambled with its CRC using the third type of RNTI, for example, when CCCH, e.g., S-TMSI, is included in the transmitted uplink data.

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

if the searched feedback of the base station does not include the matching conflict resolution identifier or the UE does not search the feedback of the base station, it indicates that the third type data transmission of the UE is unsuccessful, the UE may continue to retransmit the third type message data, and if the number of unsuccessful times of the UE reaches a threshold value N preset or configured by the base station, the UE switches to perform the second type or first type data transmission, or further determines the second type and the first type, and the determination method is as described above.

The transmission process of the third type of data according to the embodiment of the present disclosure is described above with reference to fig. 4. By employing the third type of transmission, signaling overhead is reduced and data is efficiently transmitted.

Fig. 5A and 5B illustrate a flow chart of a first type of packet data transmission performed by a user equipment according to an embodiment of the present disclosure. Referring to fig. 5A and 5B, an operation performed when the UE determines to perform the first type data transmission is described in detail in conjunction with fig. 1.

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

in a first step, the UE transmits a preamble. Two approaches are possible: mode 1), a random access resource that is completely shared with a random access resource, or partially shared; mode 2), selecting a random access resource (including a random access time-frequency resource and/or a preamble) configured by the base station and dedicated to indicate data transmission, also called a reserved uplink resource, that is, the base station can know that the UE sending the preamble needs to perform data transmission if the detected preamble is from the configured random access resource dedicated to indicate data transmission; the base station can be enabled to better configure the uplink resource in the feedback.

In a second step, the UE receives feedback from the base station. The reception is performed in a first way: the PDCCH scrambled by the RA-RNTI for the CRC is detected. The PDDCH schedules one PDSCH (including one or more RARs), and a single RAR corresponding to each RAPID (random access preamble index) may include one uplink grant (UL grant). A new RA-RNTI design may be assumed for data transmission, such as: adding a lead code index (preamble index) selected by the UE into the calculation of a new RA-RNTI; adding the calculation of whether the data transmission is performed or not, for example, if the data transmission is performed, RA-RNTI +1 is added, and if the data transmission is not performed, RA-RNTI +0 is added, namely, the data transmission is not changed; and to employ UE-specific RNTIs 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 feedback for the receiving station may also use the newly configured CORESET, or search space.

On the other hand, reception is performed in a second manner: the PDCCH scrambled by the RA-RNTI with CRC is detected, wherein the PDCCH contains (timing advance) TA, one or more UL grant. Different from the preamble transmission by using the random access resource, the UE directly obtains the UL grant through PDCCH scheduling without solving the conflict; this UL grant may be obtained by multiple UEs. When there are multiple UL grants, the multiple UL grants may be: fully independent UL grant; there are some shared parameter configurations, such as time frequency resource size, but there are some independent parameter configurations, such as different UL grant, there are different numbers of the 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.

For the one or more UL grants, the UE selects one of: a. the most recent UL grant; b. a UL grant closest to an amount of data to be transmitted by the user equipment; c. selecting, by the user equipment, a smallest UL grant that is larger than an amount of data to be transmitted by the user equipment; d. and randomly selecting one ULgrant according to equal probability.

In the second step, after receiving the feedback from the base station, the UE transmits data according to the ul grant determined (configured or selected); and when the feedback is not received or the correct feedback is not received (for example, the PDCCH of the searched RARNTI, but the RAPID does not match), the UE returns to the first step to perform the retransmission of the preamble.

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 (e.g., using legacy), the UE ID may be carried in the third message (msg 3); however, if the conflict has been resolved before (e.g. using the UE-specific RNTI), the third message may not carry the UE ID.

In the fourth step, the UE receives the collision resolution message, or receives the ACK from the base station, and/or continues UL transmission by uplink scheduling of the PDCCH.

The transmission process of the first type of data according to the embodiment of the present disclosure is described above in conjunction with fig. 5A and 5B. By employing the first type of transmission, signaling overhead is reduced and data is efficiently transmitted.

Fig. 6 is a block diagram illustrating a UE according to an embodiment of the present disclosure.

Referring to fig. 6, a UE (600) includes a transceiver (601), a processor (602), and a memory (603). The transceiver (601), processor (602), and memory (603) are configured to perform the operations of the UE shown in the figures (e.g., fig. 3-5) or described above.

By the operation of the UE shown in fig. 6, it is possible to reduce signaling overhead and efficiently transmit data.

"user equipment" or "UE" herein may refer to any terminal having wireless communication capabilities, including but not limited to mobile telephones, cellular telephones, smart phones, or Personal Digital Assistants (PDAs), portable computers, image capture devices such as digital cameras, gaming devices, music storage and playback appliances, and any portable unit or terminal having wireless communication capabilities, or internet appliances permitting wireless internet access and browsing, among others.

The term "base station" (BS) or "network device" as used herein may refer to an eNB, eNodeB, NodeB or Base Transceiver Station (BTS) or gNB, etc., depending on the technology and terminology used.

The "memory" herein may be of any type suitable to the technical environment herein, and may be implemented using any suitable data storage technology, including, without limitation, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.

The "processor" herein may be of any type suitable to the technical environment herein, including without limitation one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors, DSPs, and processors based on a multi-core processor architecture.

The above description is only exemplary of the present disclosure and should not be taken as limiting the disclosure, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

One skilled in the art will appreciate that the present disclosure includes apparatus related to performing one or more of the operations described in the present disclosure. These devices may be specially designed and manufactured for the required purposes, or they may comprise known devices in general-purpose computers. These devices have stored therein computer programs that are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., computer) readable medium, including, but not limited to, any type of disk including floppy disks, hard disks, optical disks, CD-ROMs, and magnetic-optical disks, ROMs (Read-Only memories), RAMs (Random Access memories), EPROMs (Erasable Programmable Read-Only memories), EEPROMs (Electrically Erasable Programmable Read-Only memories), flash memories, magnetic cards, or optical cards, or any type of media suitable for storing electronic instructions, and each coupled to a bus. That is, a readable medium includes any medium that stores or transmits information in a form readable by a device (e.g., a computer).

It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions may be implemented by a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, implement the aspects specified in the block or blocks of the block diagrams and/or flowchart illustrations of the present disclosure.

Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in the present disclosure may be interchanged, modified, combined, or eliminated. Further, other steps, measures, schemes in various operations, methods, flows that have been discussed in this disclosure may also be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present disclosure may also be alternated, modified, rearranged, decomposed, combined, or deleted.

The foregoing is only a partial embodiment of the present disclosure, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present disclosure, and these modifications and decorations should also be regarded as the protection scope of the present disclosure.

Claims

1. A method for transmitting data, comprising:

the user equipment triggers data transmission based on preset conditions being met;

confirming a type of data transmission based on the first information; and

a data transfer of the type of acknowledgement is performed,

wherein the type of acknowledged data transmission comprises one of: as a first type of four-step random access; a second type which is a two-step random access; and a third type as a preconfigured uplink resource transmission.

2. The method of claim 1, wherein the preset condition comprises at least one of:

the user equipment does not have uplink resources for sending the scheduling request information;

the data volume to be sent by the user equipment is not more than a preset threshold value configured or preset by the base station;

the amount of data to be transmitted by the user equipment is not greater than the maximum allowable data amount size in the resources configured by the base station;

a random access trigger event occurs; and

the base station directly indicates the data transmission through the downlink control signaling and/or the higher layer signaling.

3. The method of claim 1, wherein the first information comprises at least one of: priority of data traffic, quality of traffic, delay requirements, and downlink measurements.

4. The method of claim 3, wherein confirming, by the user equipment, the type of data transmission based on the first information comprises:

when the first information is not less than a first threshold value configured or preset by the base station, the user equipment determines the type of data transmission as a third type; and

when the first information is less than a first threshold value configured or preset by the base station, the user equipment determines the type of data transmission as a first type or a second type.

5. The method of claim 4, wherein confirming, by the user equipment, the type of data transmission based on the first information when the first information is less than a first threshold value configured or preset by the base station comprises:

when the first information is not less than a second threshold value configured or preset by the base station, the user equipment determines the type of data transmission as a second type; and

when the first information is less than a second threshold value configured or preset by the base station, the user equipment determines the type of data transmission as a first type.

6. The method of claim 1, wherein,

when the type of the data transmission is a third type, performing the confirmed type of data transmission includes the following:

determining available reserved uplink resources by configuring, by the network, the configuration information of the reserved uplink resources configured by the downlink control information and/or the high-level signaling;

performing, by the user equipment, transmission of uplink data; and

after transmitting the uplink data, feedback for searching for a base station is detected by the user equipment.

7. The method of claim 6, wherein the first and second light sources are selected from the group consisting of,

wherein the configuration information is user equipment specific or base station specific; and

wherein determining available reserved uplink resources comprises at least one of:

determining a resource size for transmission of uplink data;

determining at least one of the number of repeated transmissions, frequency hopping patterns in the time slot and frequency hopping patterns between time slots; and

a transmit counter and/or a power ramp-up counter is set.

8. The method of claim 6, wherein performing, by a user equipment, transmission of uplink data comprises at least one of:

confirming open loop power control for transmit power; and

identifying a sequence index for bit-level scrambling, wherein the sequence index comprises one of:

the used demodulation reference signal resource index and/or the used uplink resource index; or

The cell ID.

9. The method of claim 6, wherein detecting feedback searching for a base station by the user equipment after transmitting the uplink data comprises at least one of:

determining a control resource set and/or a search space for searching feedback of a base station;

when the searched base station feedback comprises the matched conflict resolution identification, determining that the data transmission of the third type is successful; and

determining that the third type of data transmission is unsuccessful when the searched base station feedback does not include a matching collision resolution identity or the user equipment does not search for base station feedback,

wherein the conflict resolution identity is one of a radio network temporary identity, a UE identity, a Common Control Channel (CCCH), a used demodulation reference signal resource index and/or a used uplink resource index specific to the user equipment.

10. The method of claim 9, wherein determining a set of control resources and/or a search space for searching for base station feedback comprises:

determining that a physical downlink control channel for searching base station feedback is a physical downlink control channel of which cyclic redundancy check is scrambled by using a special wireless network temporary identifier of user equipment; or

And determining that the physical downlink control channel for searching the base station feedback is the physical downlink control channel of which the cyclic redundancy check is scrambled by using the radio network temporary identity of the third type.

11. The method of claim 9, wherein when it is determined that the third type of data transmission is unsuccessful, the method comprises:

the user equipment performs the third type of data retransmission; and

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 data transmission to the second type or the first type.

12. The method of claim 1, wherein when the type of data transfer is a first type, performing the acknowledged type of data transfer comprises:

the user equipment transmits a preamble sequence by using uplink resources shared with or reserved for the random access resources;

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, by the user equipment, uplink data transmission based on the determined uplink grant; and

receiving, by the user equipment, a message from the base station to continue the data uplink transmission.

13. The method according to claim 12, wherein confirming the uplink grant comprises detecting the uplink grant in one or more RARs included in a PDCCH-scheduled PDSCH scrambled by the RA-RNTI for its CRC, and calculating the RA-RNTI comprises one of:

adding a preamble index (preamble index) selected by the user equipment to the calculation of the radio network temporary identifier;

adding data transmission into the calculation of the wireless network temporary identifier; and

and adopting the special wireless network temporary identifier of the user equipment configured by the base station.

14. The method of claim 12, wherein acknowledging the uplink grant comprises detecting one or more uplink grants included in a PDCCH on which the RA-RNTI is CRC scrambled and selecting, by the user equipment, one of:

the uplink permission with the time starting point of the uplink resource indicated in the uplink permission being closest to the time point of receiving the uplink permission;

an uplink grant closest to an amount of data to be transmitted by the user equipment;

a minimum uplink grant greater than an amount of data to be transmitted by the user equipment; and

and randomly selecting one of the one or more uplink grants according to the equal probability.

15. The method of claim 12, wherein the reserved uplink resource is a random access resource configured by a base station to indicate exclusive use for data transmission.

16. The method of claim 12, wherein receiving, by the user equipment, the message from the base station comprises: one of a collision resolution message, an Acknowledgement (ACK) message, or uplink scheduling of a physical downlink control channel.

17. A user equipment for receiving system information, comprising:

a transceiver to receive a signal from a base station and to transmit a signal to the base station;

a memory storing executable instructions;

a processor executing stored instructions to perform the method of any one of claims 1 to 16.