CN111800888A

CN111800888A - SDT processing method, device and system

Info

Publication number: CN111800888A
Application number: CN201910745657.3A
Authority: CN
Inventors: 莫毅韬; 吴昱民
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-10-20
Anticipated expiration: 2039-08-13
Also published as: CN111800888B; WO2021027821A1

Abstract

The embodiment of the invention discloses an SDT processing method, equipment and a system, relates to the technical field of communication, and can solve the problem that when a plurality of UE (user equipment) use PRACH (physical random access channel) resources special for SDT to carry out SDT, the transmission performance of the UE is poor. The method comprises the following steps: and under the condition that the UE triggers a first SDT random access process, determining whether to postpone the SDT or cancel the SDT according to a first transmission random number, wherein the first transmission random number is a random number generated by the UE. The embodiment of the invention is applied to the process that the UE determines whether to postpone the SDT or cancel the SDT according to the generated random number.

Description

SDT processing method, device and system

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a method, equipment and a system for processing SDT.

Background

In a communication system, a User Equipment (UE) may perform data transmission in a random access procedure (e.g., a four-step RACH (4-step RACH)), that is, a UE in a non-connected state (i.e., an idle state or an inactive state) may complete data transmission without performing Radio Resource Control (RRC) state switching, where the data transmission in the random access procedure is Small Data Transmission (SDT).

The UE must select to use the transmission resource dedicated to the SDT to initiate the SDT, so when configuring the transmission resource, the network device needs to reserve a Physical Random Access Channel (PRACH) resource dedicated to the SDT for the UE to initiate the SDT. Due to the lack of transmission resources dedicated to SDT, when a plurality of UEs in a serving cell all use PRACH resources dedicated to SDT for SDT, some UEs may fail to perform SDT, thereby resulting in poor transmission performance of UEs.

Disclosure of Invention

Embodiments of the present invention provide an SDT processing method, device, and system, which can solve the problem that when multiple UEs perform SDT using PRACH resources dedicated to SDT, the transmission performance of the UEs is poor.

In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:

in a first aspect of the embodiments of the present invention, an SDT processing method is provided, which is applied to a UE, and includes: and under the condition that the UE triggers a first SDT random access process, determining whether to postpone the SDT or cancel the SDT according to a first transmission random number, wherein the first transmission random number is a random number generated by the UE.

In a second aspect of the embodiments of the present invention, an SDT processing method is provided, which is applied to a network device, and includes: sending configuration information to the UE, the configuration information including at least one of: the SDT transmission factor corresponding to each random access process type, the duration of the first timer, the duration of the second timer, the maximum counting threshold value of the first counter, the maximum counting threshold value of the second counter, the delay indication information and the information of the adjacent cell supporting the SDT. The first timer is used for indicating the time length of the SDT which allows the UE to determine to recover the postponement, the second timer is used for indicating the time length of the SDT which allows the UE to determine to recover the cancellation, the first counter is used for accumulating the times of the SDT which is determined to be postponed by the UE, the second counter is used for accumulating the times of cell reselection evaluation by the UE, and the postponing indication information is used for indicating the maximum time length of the SDT which allows the UE to determine to postpone; the information of the neighbor cells supporting the SDT includes at least one of: the identification of the neighbor cell of the serving cell where the UE is located, the SDT configuration parameter information of the neighbor cell of the serving cell where the UE is located, and the frequency point priority corresponding to the neighbor cell of the serving cell where the UE is located.

In a third aspect of the embodiments of the present invention, a UE is provided, where the UE may include: and determining a module. The determining module is configured to determine whether to defer or cancel the SDT according to a first transmission random number when the UE triggers the first SDT random access procedure, where the first transmission random number is a random number generated by the UE.

In a fourth aspect of the embodiments of the present invention, a network device is provided, where the network device may include: and a sending module. The sending module is configured to send configuration information to the UE, where the configuration information includes at least one of: the SDT transmission factor corresponding to each random access process type, the duration of the first timer, the duration of the second timer, the maximum counting threshold value of the first counter, the maximum counting threshold value of the second counter, the delay indication information and the information of the adjacent cell supporting the SDT. The first timer is used for indicating the time length of the SDT which allows the UE to determine to recover the postponement, the second timer is used for indicating the time length of the SDT which allows the UE to determine to recover the cancellation, the first counter is used for accumulating the times of the SDT which is determined to be postponed by the UE, the second counter is used for accumulating the times of cell reselection evaluation by the UE, and the postponing indication information is used for indicating the maximum time length of the SDT which allows the UE to determine to postpone; the information of the neighbor cells supporting the SDT includes at least one of: the identification of the neighbor cell of the serving cell where the UE is located, the SDT configuration parameter information of the neighbor cell of the serving cell where the UE is located, and the frequency point priority corresponding to the neighbor cell of the serving cell where the UE is located.

In a fifth aspect of the embodiments of the present invention, a UE is provided, where the UE includes a processor, a memory, and a computer program stored in the memory and being executable on the processor, and the computer program, when executed by the processor, implements the steps of the SDT processing method in the first aspect.

In a sixth aspect of the embodiments of the present invention, a network device is provided, where the network device includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, and the computer program, when executed by the processor, implements the steps of the SDT processing method in the second aspect.

A seventh aspect of the present embodiments provides a communication system, where the communication system includes the UE according to the third aspect, and the network device according to the fourth aspect; alternatively, the communication system comprises the UE according to the fifth aspect and the network device according to the sixth aspect.

An eighth aspect of the embodiments of the present invention provides a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the SDT processing method according to the first aspect, or the steps of the SDT processing method according to the second aspect.

In the embodiment of the present invention, when the UE triggers the first SDT random access procedure, the UE may determine whether to defer SDT or cancel SDT according to the generated first transmission random number. Because the UE can determine whether to defer or cancel the SDT according to the randomly generated first transmission random number, that is, multiple UEs in one serving cell can randomly generate one transmission random number, and determine whether to defer or cancel the SDT according to the generated transmission random number, instead of directly selecting the transmission resource using the SDT to perform the SDT, the number of UEs performing the SDT using the transmission resource of the SDT in one serving cell can be reduced, thereby improving the transmission performance of the UEs.

Drawings

Fig. 1 is a schematic architecture diagram of a communication system according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an SDT processing method according to an embodiment of the present invention;

fig. 3 is a second schematic diagram of an SDT processing method according to an embodiment of the invention;

fig. 4 is a third schematic diagram of an SDT processing method according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 6 is a second schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 7 is a third schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 8 is a fourth schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 9 is a fifth schematic structural diagram of a UE according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 11 is a hardware diagram of a UE according to an embodiment of the present invention;

fig. 12 is a hardware schematic diagram of a network device according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "first" and "second," and the like, in the description and in the claims of embodiments of the present invention are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first timer and the second timer, etc. are used to distinguish different timers, rather than to describe a particular order of the timers.

In the description of the embodiments of the present invention, the meaning of "a plurality" means two or more unless otherwise specified. For example, a plurality of elements refers to two elements or more.

The term "and/or" herein is an association relationship describing an associated object, and means that there may be three relationships, for example, a display panel and/or a backlight, which may mean: there are three cases of a display panel alone, a display panel and a backlight at the same time, and a backlight alone. The symbol "/" herein denotes a relationship in which the associated object is or, for example, input/output denotes input or output.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The following explains some concepts and/or terms involved in the SDT processing method, device, and system provided by the embodiments of the present invention.

SDT (also known as Early Data Transmission (EDT)): for a UE in a non-connected state (i.e., idle state or inactive state), a simple signaling procedure may be used to perform small data transmission (e.g., automatic reporting of a water meter) so as to avoid Radio Resource Control (RRC) state change and RRC signaling overhead. In Long Term Evolution (LTE), the SDT introduces two schemes of a Control Plane (CP) and a User Plane (UP) for an Uplink (UL).

The CP scheme is characterized in that: carrying small data transmission by RRC signaling to avoid establishing Data Radio Bearer (DRB); without entering the RRC connected state, all messages are sent on Signaling Radio Bearers (SRBs) 0 in a default configuration, and Radio Link Control (RLC) Transparent Mode (TM) does not support RRC signaling segmentation. The uplink user data can be directly attached to an uplink RRC early data request (early data request) message in a form similar to a non-access stratum (NAS) message for transmission. The downlink user data can be transmitted in a downlink RRC early data complete (early data complete) message in a form similar to an NAS message.

The UP scheme is characterized in that: the UE may perform UL UP SDT when the UE has DRB configuration but is not in RRC connected state. The UE is in a similar inactive (inactive) state, all DRBs are suspended, the UE needs to recover RRC connection first and re-enter a connected state according to a normal data transmission flow, and then can normally receive and transmit data, and UL UP SDT can avoid the conversion of the RRC state, so that the purpose of small data transmission is achieved with small signaling overhead.

The UP SDT uses DRB transport, AS security is already activated, so the UP SDT can perform necessary security protection on data, such AS data encryption and integrity protection. From a security perspective, the security key used by the UE to retransmit the packet needs to be updated at this time, since the UE may have moved to another base station in the suspend state. The UE may perform the next key update operation according to the parameter for calculating the next-hop key, which is provided to the UE by the network device when the UE enters the suspended state.

Data of the UL UP SDT is carried on a Dedicated Traffic Channel (DTCH), and is transmitted after being multiplexed with an uplink RRC connection resume request (connection resume request) message. Similarly, if there is a downlink message in reply, it may also be carried on DTCH, and transmitted after being multiplexed with a downlink RRC connection release (connectionrelease) message. The uplink data and the downlink data are encrypted, and the next updated key can be used for encryption. The transmission mode may be RLC Unacknowledged Mode (UM) or Acknowledged Mode (AM), but is not segmented.

The implementation of the SDT process in a Media Access Control (MAC) layer mainly affects the random access process. According to the original random access process, message 1(Msg1) sends a preamble sequence (preamble) for Timing Advance (TA) measurement and request, message 2(Msg2) allocates an uplink grant (UL grant) and TA, message 3(Msg3) transmits an uplink Common Control Channel (CCCH), which is generally an RRC connection establishment request or an RRC connection recovery request in this case, and message 4(Msg4) performs contention resolution. In SDT, however, since data transfer without state transition is required, user data is directly transmitted in Msg 3. Msg3 of SDT requires a larger UL grant than conventional Msg3 to adequately carry user data, so from Msg1 sending preamble, it is necessary to distinguish conventional RACH from RACH request accompanying SDT to network device, so that network device can allocate sufficient resource for UE at Msg2 for data transmission.

The embodiment of the invention provides an SDT processing method, equipment and a system, wherein under the condition that UE triggers a first SDT random access process, the UE can determine whether to postpone SDT or cancel SDT according to a generated first transmission random number. Because the UE can determine whether to defer or cancel the SDT according to the randomly generated first transmission random number, that is, multiple UEs in one serving cell can randomly generate one transmission random number, and determine whether to defer or cancel the SDT according to the generated transmission random number, instead of directly selecting the transmission resource using the SDT to perform the SDT, the number of UEs performing the SDT using the transmission resource of the SDT in one serving cell can be reduced, thereby improving the transmission performance of the UEs.

The SDT processing method, the SDT processing equipment and the SDT processing system provided by the embodiment of the invention can be applied to a communication system. The method and the device can be particularly applied to the process that the UE determines whether to postpone the SDT or cancel the SDT according to the generated random number based on the communication system.

Fig. 1 is a schematic diagram illustrating an architecture of a communication system according to an embodiment of the present invention. As shown in fig. 1, the communication system may include a UE 01 and a network device 02. Wherein, the UE 01 and the network device 02 can establish connection and communicate.

A UE is a device that provides voice and/or data connectivity to a user, a handheld device with wired/wireless connectivity, or other processing device connected to a wireless modem. A UE may communicate with one or more core network devices via a Radio Access Network (RAN). The UE may be a mobile terminal such as a mobile phone (or "cellular" phone) and a computer having a mobile terminal, or a portable, pocket, hand-held, computer-included, or vehicle-mounted mobile device that exchanges speech and/or data with the RAN, such as a Personal Communication Service (PCS) phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), and so on. The UE may also be referred to as a user agent (user agent) or a terminal device, etc.

The network device may be a base station. A base station is a device deployed in a RAN for providing wireless communication functions for UEs. The base stations may include various forms of macro base stations, micro base stations, relay stations, access points, and the like. In systems using different radio access technologies, the names of devices with base station functionality may differ, for example, in third generation mobile communication (3G) networks, referred to as base stations (NodeB); in an LTE system, referred to as an evolved NodeB (eNB or eNodeB); in fifth generation mobile communication (5G) networks, referred to as a gNB, and so on. As communication technology evolves, the name "base station" may change.

An SDT processing method, device, and system provided in the embodiments of the present invention are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

Based on the communication system shown in fig. 1, an embodiment of the present invention provides an SDT processing method, which may include

steps

201 and 202 described below, as shown in fig. 2.

Step 201, under the condition that the UE triggers the first SDT random access procedure, the UE generates a first transmission random number.

Step 202, the UE determines whether to defer SDT or cancel SDT according to the first transmission random number.

In an embodiment of the present invention, the first transmission random number is a random number generated by the UE.

Optionally, in this embodiment of the present invention, the first SDT random access procedure may be an SDT four-step random access procedure (SDT 4-step RACH) or an SDT two-step random access procedure (SDT 2-step RACH).

It should be noted that the SDT four-step random access procedure may be understood as follows: triggering to perform the SDT in the four-step random access process, where the SDT two-step random access process may be understood as: triggering SDT in a two-step random access procedure.

Optionally, in this embodiment of the present invention, the SDT four-step random access procedure may include CP-SDT 4-stepRACH (e.g., data is sent in the 3 rd message (i.e., Msg3) of the 4-step random access procedure through a signaling radio bearer) and UP-SDT4-step RACH (e.g., data is sent in the 3 rd message of the 4-step random access procedure through a data radio bearer); the SDT two-step random access procedure described above may include a CP-SDT 2-step RACH (e.g., sending data via message A (i.e., MsgA) of a 2-step random access procedure over a signaling radio bearer) and an UP-SDT 2-step RACH (e.g., sending data via message A of a 2-step random access procedure over a data radio bearer).

Optionally, in this embodiment of the present invention, after a lower layer (e.g., a Media Access Control (MAC) layer) of the UE receives an SDT triggered by an upper layer (e.g., an RRC layer), the lower layer of the UE may trigger a random access procedure and generate a first transmission random number.

Optionally, in this embodiment of the present invention, the UE may generate a random number (e.g., a first transmission random number) with equal probability in the interval [0, 1).

It is to be appreciated that in the case where the UE determines, based on the first transmission random number, to allow the UE to select to use the transmission resource of the SDT for SDT, the UE may determine not to defer SDT or not to cancel SDT (i.e., the UE determines to select to use the transmission resource of the SDT for SDT); in the case where the UE determines, based on the first transmission random number, that the UE is not allowed (or prohibited) to select the transmission resource for SDT, the UE may determine to defer SDT or cancel SDT.

It should be noted that the above-mentioned transmission resource of the SDT can be understood as a transmission resource dedicated to the SDT. If the UE determines to select to use the transmission resource of the SDT for SDT, the UE may perform selection of the transmission resource dedicated to SDT and data transmission (i.e., perform SDT on the selected transmission resource of the SDT).

Optionally, in this embodiment of the present invention, the transmission resource of the SDT may include at least one of the following: the PRACH resource dedicated to the SDT and the PUSCH configuration resource in association with the PRACH resource dedicated to the SDT.

It can be understood that, in the embodiment of the present invention, the first transmission random number may be used to determine whether to allow the UE to select to use the transmission resource of the SDT for the SDT.

Optionally, in this embodiment of the present invention, as shown in fig. 3 in combination with fig. 2, the step 202 may be specifically implemented by a step 202a or a step 202b described below.

It should be noted that, in fig. 3, in order to more clearly illustrate the execution relationship between the step 202a and the step 202b (i.e., after the step 201, the step 202a or the step 202b is executed), the step 202b is illustrated by a dashed box.

Step 202a, if the first transmission random number satisfies the first condition, the UE determines to select the transmission resource of the SDT for the SDT.

In an embodiment of the present invention, the first condition is: the first transmission random number is less than a first SDT transmission factor indicating a probability of allowing the UE to select SDT using the transmission resources of SDT. Or, the first condition is: the first transmission random number is greater than or equal to a first SDT transmission factor indicating a probability that the UE is not allowed to select to use the transmission resources of the SDT for SDT.

It is to be appreciated that after the UE generates the first transmission random number, the UE can compare the first transmission random number to the first SDT transmission factor to determine whether to defer SDT or cancel SDT.

Optionally, in this embodiment of the present invention, the first SDT transmission factor may be configured by the network device for the UE, and the first SDT transmission factor is an SDT transmission factor corresponding to the type of the first SDT random access procedure.

Optionally, in the embodiment of the present invention, after the UE determines to select the SDT using the transmission resource of the SDT, the UE may perform the SDT on the selected transmission resource of the SDT.

Step 202b, if the first transmission random number does not satisfy the first condition, the UE determines to defer the SDT or cancel the SDT.

Optionally, in this embodiment of the present invention, if the first transmission random number is smaller than a first SDT transmission factor (where the first SDT transmission factor is used to indicate a probability that the UE is allowed to select to use a transmission resource of the SDT for performing SDT), the UE determines to select to use the transmission resource of the SDT for performing SDT; if the first transmission random number is greater than or equal to a first SDT transmission factor indicating a probability of allowing the UE to select SDT using the transmission resources of SDT, the UE determines to defer SDT or cancel SDT.

Optionally, in this embodiment of the present invention, if the first transmission random number is greater than or equal to a first SDT transmission factor (where the first SDT transmission factor is used to indicate a probability that the UE is not allowed to select to use a transmission resource of the SDT for performing SDT), the UE determines to select to use the transmission resource of the SDT for performing SDT; if the first transmission random number is less than a first SDT transmission factor (the first SDT transmission factor is used for indicating the probability that the UE is not allowed to select to use the transmission resource of the SDT for the SDT), the UE determines to postpone the SDT or cancel the SDT.

In the embodiment of the present invention, the UE may determine whether the first transmission random number satisfies the first condition to determine whether to defer or cancel the SDT, that is, the plurality of UEs in one serving cell may determine whether the transmission random numbers generated by the UEs satisfy the first condition to determine whether to defer or cancel the SDT, instead of directly selecting the transmission resource of the SDT for performing the SDT, so that the number of UEs performing the SDT using the transmission resource of the SDT in one serving cell may be reduced, thereby improving the transmission performance of the UEs.

The embodiment of the invention provides an SDT processing method, wherein under the condition that UE triggers a first SDT random access process, the UE can determine whether to postpone SDT or cancel SDT according to a generated first transmission random number. Because the UE can determine whether to defer or cancel the SDT according to the randomly generated first transmission random number, that is, multiple UEs in one serving cell can randomly generate one transmission random number, and determine whether to defer or cancel the SDT according to the generated transmission random number, instead of directly selecting the transmission resource using the SDT to perform the SDT, the number of UEs performing the SDT using the transmission resource of the SDT in one serving cell can be reduced, thereby improving the transmission performance of the UEs.

Furthermore, the number of the UE which uses the SDT transmission resource to carry out the SDT in one service cell is reduced, so that the wireless resource load imbalance is avoided, the reliability of data transmission and the resource utilization rate are ensured, the whole signaling overhead of the system is reduced, and the whole performance of the system can be improved.

Optionally, in the embodiment of the present invention, as shown in fig. 4 in combination with fig. 2, before the step 201, the SDT processing method provided in the embodiment of the present invention may further include the following step 301 and step 302.

Step 301, the network device sends configuration information to the UE.

Step 302, the UE receives configuration information sent by the network device.

In an embodiment of the present invention, the configuration information includes at least one of the following: the method comprises the steps of SDT transmission factors corresponding to each random access process type, the time length of a first timer, the time length of a second timer, the maximum counting threshold value of a first counter, the maximum counting threshold value of a second counter, delay indication information (backoff indicator) and information of a neighbor cell supporting SDT.

In the embodiment of the present invention, the first timer is configured to indicate a duration of allowing the UE to determine to resume the deferred SDT, the second timer is configured to indicate a duration of allowing the UE to determine to resume the cancelled SDT, the first counter is configured to accumulate times of determining to postpone the SDT by the UE, the second counter is configured to accumulate times of performing cell reselection evaluation by the UE, and the deferral indication information is configured to indicate a maximum duration of allowing the UE to determine to defer the SDT; the information of the neighbor cells supporting the SDT includes at least one of: the identification of the neighbor cell of the serving cell where the UE is located, the SDT configuration parameter information of the neighbor cell of the serving cell where the UE is located, and the frequency point priority corresponding to the neighbor cell of the serving cell where the UE is located.

Optionally, in this embodiment of the present invention, the SDT configuration parameter information may include at least one of the following: information whether a neighbor cell of a serving cell where the UE is located supports CP-SDT, information whether a neighbor cell of a serving cell where the UE is located supports UP-SDT, a maximum allowed Transport Block Size (TBS) of SDT of a neighbor cell of a serving cell where the UE is located, and an SDT random access resource parameter of a neighbor cell of a serving cell where the UE is located.

Optionally, in this embodiment of the present invention, the network device may broadcast a system message (including the configuration information) to a plurality of UEs in one serving cell.

Optionally, in this embodiment of the present invention, the network device may configure one SDT transmission factor for each type of random access procedure. For example, the network device configures the SDT transmission factor for the four-step random access procedure to be 0.5, and configures the SDT transmission factor for the two-step random access procedure to be 0.3.

Optionally, in this embodiment of the present invention, the identifier of the neighboring cell of the serving cell where the UE is located may include at least one of the following: frequency points of cell definition-synchronization signaling (CD-SSB) blocks corresponding to neighboring cells, Physical Cell Identifiers (PCIs), and the like.

Optionally, in the embodiment of the present invention, the SDT random access resource parameter may be an SDT-random access preamble (preamble).

Optionally, in this embodiment of the present invention, the random access resource parameter may include PRACH resource available in each coverage enhancement range (CE level).

In the embodiment of the invention, the network equipment can send the configuration information to configure the judgment condition whether to postpone the SDT or cancel the SDT to a plurality of UEs in one service cell, so that the plurality of UEs in one service cell can determine whether to postpone the SDT or cancel the SDT according to the configuration information, but do not directly select the transmission resource of the SDT to carry out the SDT, thereby reducing the number of the UEs which use the transmission resource of the SDT to carry out the SDT in one service cell and improving the transmission performance of the UEs.

Optionally, in the embodiment of the present invention, after the step 202, the SDT processing method provided in the embodiment of the present invention may further include the following step 401.

Step 401, if it is determined to postpone the SDT, the UE starts a first timer, and/or performs an operation of accumulating 1 on a first counter.

Optionally, in this embodiment of the present invention, if it is determined to defer the SDT, the MAC layer may start the first timer, and/or perform 1-increment operation on the first counter.

Optionally, in the embodiment of the present invention, after the step 401, the SDT processing method provided in the embodiment of the present invention may further include the following step 501, step 502, and step 503 (or step 504).

Step 501, the UE generates a time length random number.

In the embodiment of the present invention, the duration random number is used to indicate the duration of deferring the SDT.

Optionally, in this embodiment of the present invention, the UE may generate a random number (i.e., a duration random number) with equal probability within 0 to the maximum duration (i.e., the maximum duration indicated by the deferral indication information that allows the UE to determine to defer the SDT), and use the random number as the duration of deferring the SDT.

Step 502, after deferring the duration indicated by the SDT duration random number, the UE generates a second transmission random number.

In this embodiment of the present invention, the second transmission random number is used to determine whether to allow the UE to select a transmission resource for SDT.

Optionally, in this embodiment of the present invention, the UE may generate a random number (for example, a second transmission random number) with equal probability in the interval [0, 1).

Step 503, if the second transmission random number satisfies the first condition, the UE determines to select the transmission resource using the SDT for performing the SDT, and stops the first timer, and/or resets the first counter.

It will be appreciated that after the UE generates the second transmission nonce, the UE may compare the second transmission nonce to the first SDT transmission factor to determine whether to defer SDT or cancel SDT.

It should be noted that, the above-mentioned resetting operation of the first counter can be understood as: the count of the first counter is set to 0.

Step 504, if the second transmission random number does not satisfy the first condition, the UE determines to defer the SDT, and if the second transmission random number satisfies the second condition, the UE determines to cancel the SDT.

In an embodiment of the present invention, the second condition includes at least one of the following: the first timer is overtime, and the accumulated times of the first counter are larger than or equal to the maximum counting threshold value of the first counter.

Optionally, in this embodiment of the present invention, if the second transmission random number is smaller than the first SDT transmission factor (where the first SDT transmission factor is used to indicate a probability that the UE is allowed to select to use the transmission resource of the SDT for performing the SDT), the UE determines to select to use the transmission resource of the SDT for performing the SDT, and stops the first timer, and/or performs a reset operation on the first counter; if the second transmission random number is greater than or equal to the first SDT transmission factor indicating the probability of allowing the UE to select to perform SDT using the transmission resource of the SDT, the UE determines to defer the SDT (i.e., to continue to perform the above-mentioned steps 501, 502, and 503 (or step 504)), and if the second condition is satisfied, determines to cancel the SDT.

Optionally, in this embodiment of the present invention, if the second transmission random number is greater than or equal to a first SDT transmission factor (where the first SDT transmission factor is used to indicate a probability that the UE is not allowed to select a transmission resource using the SDT for performing the SDT), the UE determines to select the transmission resource using the SDT for performing the SDT, and stops the first timer, and/or performs a reset operation on the first counter; if the second transmission random number is smaller than the first SDT transmission factor (the first SDT transmission factor is used for indicating the probability that the UE is not allowed to select the SDT transmission resource for SDT), the UE determines to postpone the SDT, and if the second condition is met, the UE determines to cancel the SDT.

Optionally, in the embodiment of the present invention, the first counter performs an accumulation 1 operation once every time the UE determines to defer the SDT, and if the UE determines that the accumulation number of deferring the SDT is greater than or equal to the maximum count threshold of the first counter, the UE determines to cancel the SDT.

Optionally, in this embodiment of the present invention, the MAC layer may send an indication message to the higher layer to indicate that the SDT is cancelled.

In the embodiment of the present invention, after deferring the duration indicated by the random number of the SDT duration, the UE may generate a random number (i.e., the second transmission random number) again to determine whether to continue deferring the SDT or cancel the SDT, so as to improve the transmission performance of the UE.

Optionally, in the embodiment of the present invention, after the step 202 or the step 504, the SDT processing method provided in the embodiment of the present invention may further include a step 601 described below.

Step 601, if the SDT is determined to be cancelled, the UE starts a second timer, and/or performs 1 accumulation operation on a second counter.

Optionally, in this embodiment of the present invention, after receiving the indication information sent by the MAC layer, the UE higher layer may start a second timer, and/or perform 1-accumulation operation on a second counter.

Optionally, in the embodiment of the present invention, after the step 601, the SDT processing method provided in the embodiment of the present invention may further include the following step 701, step 702, and step 703 (or step 704).

Step 701, the UE determines a candidate cell according to the information of the neighbor cell supporting the SDT.

It is to be appreciated that the UE may determine a cell indicated by the information of the neighbor cells supporting SDT as a candidate cell, the candidate cell including at least one cell.

Step 702, the UE performs cell reselection evaluation on cells in the candidate cells.

Optionally, in this embodiment of the present invention, the step 702 may be specifically implemented by the following step 702 a.

Step 702a, the UE carries out cell reselection evaluation on cells in the candidate cells in sequence from the high-priority frequency point according to the frequency point priority.

It can be understood that the UE may sequentially evaluate whether each frequency point has a cell satisfying the reselection condition from a high priority frequency point according to the priority of the frequency point corresponding to the neighboring cell of the serving cell where the UE is located.

Step 703, if at least one first cell in the candidate cells meets the reselection condition, the UE determines a first cell with the highest priority of the frequency points in the at least one first cell as a target cell, and triggers a first SDT random access process in the target cell, and stops a second timer, and/or resets a second counter.

In an embodiment of the present invention, the reselection condition includes at least one of: the cell meets reselection criteria and the SDT configuration parameter information meets trigger conditions corresponding to a first SDT random access process.

Optionally, in this embodiment of the present invention, the reselection criterion may include at least one of: an S criterion and an R criterion.

It should be noted that, for the descriptions of the S criterion and the R criterion, reference may be made to related descriptions in the prior art, and details are not described herein.

Optionally, in this embodiment of the present invention, the reselection criterion may be configured or predefined (e.g., specified by a protocol) by the network device.

Optionally, in the embodiment of the present invention, if the SDT configuration parameter information includes information that the neighboring cell of the serving cell where the UE is located supports CP-SDT, the SDT configuration parameter information satisfies a trigger condition corresponding to the first SDT random access procedure.

Optionally, in the embodiment of the present invention, if the SDT configuration parameter information includes information that the neighboring cell of the serving cell where the UE is located supports the UP-SDT, the SDT configuration parameter information satisfies a trigger condition corresponding to the first SDT random access procedure.

Optionally, in the embodiment of the present invention, if the SDT configuration parameter information includes the maximum allowed TBS of the SDT of the neighboring cell of the serving cell where the UE is located, the condition that the SDT configuration parameter information satisfies the trigger condition corresponding to the first SDT random access procedure may be understood as: and the maximum allowed TBS of the SDT of the adjacent cell of the serving cell where the UE is located is larger than or equal to the size of the SDT transmission block corresponding to the first SDT random access process.

Optionally, in this embodiment of the present invention, if the SDT configuration parameter information includes a PRACH resource dedicated to SDT or a PUSCH configuration resource associated with the PRACH resource dedicated to SDT, the SDT configuration parameter information satisfies a trigger condition corresponding to the first SDT random access procedure.

Optionally, in the embodiment of the present invention, if the SDT configuration parameter information includes PRACH resource dedicated to SDT and corresponding to CE level determined by the UE, the SDT configuration parameter information satisfies a trigger condition corresponding to the first SDT random access procedure.

Optionally, in the embodiment of the present invention, if the SDT configuration parameter information includes PRACH resource dedicated to SDT and corresponding to a level higher than the CE level determined by the UE, the SDT configuration parameter information satisfies a trigger condition corresponding to the first SDT random access procedure.

Optionally, in the embodiment of the present invention, if the partial cells in the candidate cells do not satisfy the reselection condition after the UE performs cell reselection evaluation on the partial cells, the UE may back to generate an RRC message to indicate the UE to trigger a random access procedure (i.e., a conventional random access procedure).

Optionally, in the embodiment of the present invention, if all cells in the candidate cells do not satisfy the reselection condition, the UE may back to generate an RRC message to indicate that the UE triggers the random access process.

Step 704, if the third condition is satisfied, the UE backs down to generate an RRC message to instruct the UE to trigger a random access procedure.

In an embodiment of the present invention, the third condition includes at least one of: the second timer is overtime, and the accumulated times of the second counter is greater than or equal to the maximum counting threshold value of the second counter.

Optionally, in this embodiment of the present invention, the RRC message may be an RRC connection request (RRC connection request), an RRC setup request (RRC setup request), an RRC connection recovery request (RRC connection resume request), an RRC recovery request (RRC resume request), or an RRC resume request 1.

Optionally, in the embodiment of the present invention, the random access process may be a two-step random access process or a four-step random access process.

Optionally, in the embodiment of the present invention, each time the UE performs cell reselection evaluation, the second counter performs an accumulation 1 operation, and if the number of times that the UE performs cell reselection evaluation is greater than or equal to the maximum count threshold of the second counter, the UE backs to generate an RRC message to indicate that the UE triggers a random access process.

In the embodiment of the invention, the UE can perform cell reselection evaluation on the cells in the candidate cells, and determine whether to trigger the first SDT random access process or to trigger the random access process by backspacing according to the result of the cell reselection evaluation, so that the transmission performance of the UE is improved.

The SDT processing method provided in the embodiment of the present invention is described below by way of a specific embodiment (for example, embodiment one).

Implementation mode one

Step 11, the network device sends configuration information related to the SDT transmission to the UE through a system message.

In this embodiment of the present invention, the configuration information may include at least one of the following: an SDT transmission factor corresponding to a certain RACH type (e.g., 2-stepRACH, 4-step RACH), a duration of the first timer, a duration of the second timer, a maximum count threshold of the first counter, a maximum count threshold of the second counter, deferral indication information (backoff indicator) for SDT, information of neighbor cells supporting SDT (i.e., a white list of cells supporting SDT).

Illustratively, the SDT transmission factor corresponding to the 2-step RACH is configured to be 0.3, and the SDT transmission factor corresponding to the 4-step RACH is configured to be 0.5 in the system message.

Step 12: when the MAC layer receives a high layer (for example, an RRC layer) to trigger SDT, and when the random access process is triggered, the MAC layer generates a random number and compares the random number with an SDT transmission factor corresponding to a corresponding RACH type to judge whether to postpone or cancel the SDT.

Optionally, in this embodiment of the present invention, the UE may generate a random number with equal probability in the [0,1) interval, and when the generated random number is greater than or equal to the SDT transmission factor corresponding to the corresponding RACH type, the UE may postpone the SDT and perform step 13 described below, or the MAC layer may indicate to the higher layer that the SDT is cancelled and perform step 14 described below.

Step 13: when the UE determines to defer the SDT transmission, the MAC layer starts/restarts the first timer and/or performs a 1-up operation on the first counter. The UE may generate a random number (i.e., a duration random number) with equal probability within 0 and the maximum duration (i.e., the maximum duration indicated by the deferral indication information that allows the UE to determine to defer the SDT), and use the random number as the duration of the deferral (backoff) SDT. After deferring the duration indicated by the SDT duration nonce, the UE may generate a nonce again at equal probability within the [0,1) interval, and if the generated nonce is less than the SDT transmission factor corresponding to the corresponding RACH type, the UE may stop the first timer, and/or reset the first counter (e.g., set the count of the first counter to 0), and perform SDT resource selection and data transmission according to the protocol rules. If the generated random number is greater than or equal to the SDT transmission factor corresponding to the corresponding RACH type, the UE may continue to perform step 13. If the first timer expires and/or the cumulative number of times of the first counter reaches the maximum count threshold value of the first counter, the MAC layer may indicate to the higher layer that the SDT is cancelled.

Step 14: after the UE receives the indication that the SDT is cancelled, the UE may start/restart the second timer, and/or perform 1 accumulation operation on the second counter, and the UE may determine a candidate cell that may be a reselected cell according to a white list of cells supporting the SDT provided in the system message (for example, the cell may broadcast SDT configuration related information of neighboring cells), and then perform cell reselection evaluation on the candidate cell (for example, the UE sequentially evaluates whether each frequency point has a suitable reselected cell from a high-priority frequency point based on the order of the priority of the provided frequency points) to determine whether a reselection condition is satisfied. If there is a suitable cell, the cell with the highest priority of the corresponding frequency point is used as a reselected cell (i.e., a target cell in the above embodiment) of the UE, and cell reselection/selection is performed (i.e., a first SDT random access procedure is triggered in the reselected cell), and the second timer is stopped, and/or a second counter is reset. If none of the candidate cells for cell reselection evaluation satisfies the reselection condition, the UE may back (fallback) to perform a normal RACH (e.g., RRC signaling message and UP user data are not multiplexed in one TB, where the RACH may be 2-step RACH or 4-step RACH) procedure. Alternatively, if the second timer expires and/or the cumulative number of times of the second counter reaches the maximum count threshold value of the second counter, the UE may fall back to performing the normal RACH.

Step 15: if the UE performs cell reselection/selection (for example, selects a cell with a suitable SDT configuration) according to the step 14, at this time, the UE does not perform any operation on the second timer and/or the second counter (for example, does not start/restart the second timer, and/or does not perform a reset operation on the second counter), and the UE higher layer triggers the MAC layer to perform SDT again, and performs the step 11.

It should be noted that, for the relevant contents related to the above steps 11 to 15, reference may be made to the relevant description in the above embodiments, and details are not described here again.

Fig. 5 shows a schematic diagram of a possible structure of a UE involved in the embodiment of the present invention. As shown in fig. 5, a UE 50 provided in an embodiment of the present invention may include: a determination module 51.

The determining module 51 is configured to determine whether to defer or cancel the SDT or not according to a first transmission random number when the UE triggers the first SDT random access procedure, where the first transmission random number is a random number generated by the UE.

In a possible implementation manner, the determining module 51 is specifically configured to determine to select to use a transmission resource of the SDT for the SDT if the first transmission random number meets the first condition; or, if the first transmission random number does not satisfy the first condition, determining to defer the SDT or cancel the SDT. Wherein, the first condition may be: the first transmission random number is less than a first SDT transmission factor indicating a probability of allowing the UE to select SDT using the transmission resources of SDT. Alternatively, the first condition may be: the first transmission random number is greater than or equal to a first SDT transmission factor indicating a probability that the UE is not allowed to select to use the transmission resources of the SDT for SDT.

In a possible implementation manner, with reference to fig. 5, as shown in fig. 6, the UE provided in the embodiment of the present invention may further include: a receiving module 52. Wherein, the receiving module 52 is configured to receive configuration information sent by the network device before the determining module 51 determines whether to defer or cancel the SDT according to the first transmission random number, where the configuration information includes at least one of the following: the SDT transmission factor corresponding to each random access process type, the duration of the first timer, the duration of the second timer, the maximum counting threshold value of the first counter, the maximum counting threshold value of the second counter, the delay indication information and the information of the adjacent cell supporting the SDT. The first timer is used for indicating the time length of the SDT which allows the UE to determine to recover the postponement, the second timer is used for indicating the time length of the SDT which allows the UE to determine to recover the cancellation, the first counter is used for accumulating the times of the SDT which is determined to be postponed by the UE, the second counter is used for accumulating the times of cell reselection evaluation by the UE, and the postponing indication information is used for indicating the maximum time length of the SDT which allows the UE to determine to postpone; the information of the neighbor cells supporting the SDT includes at least one of: the identification of the neighbor cell of the serving cell where the UE is located, the SDT configuration parameter information of the neighbor cell of the serving cell where the UE is located, and the frequency point priority corresponding to the neighbor cell of the serving cell where the UE is located.

In a possible implementation manner, the SDT configuration parameter information may include at least one of the following: the information whether the neighbor cell of the serving cell where the UE is located supports the control plane CP-SDT, the information whether the neighbor cell of the serving cell where the UE is located supports the user plane UP-SDT, the SDT maximum allowable transmission block size of the neighbor cell of the serving cell where the UE is located, and the SDT random access resource parameter of the neighbor cell of the serving cell where the UE is located.

In a possible implementation manner, with reference to fig. 6, as shown in fig. 7, the UE provided in the embodiment of the present invention may further include: a processing module 53. Wherein, the processing module 53 is configured to start the first timer and/or perform 1-increment operation on the first counter if the determining module 51 determines to defer the SDT.

In a possible implementation manner, with reference to fig. 7, as shown in fig. 8, the UE provided in the embodiment of the present invention may further include: a generation module 54 and a stop module 55. Wherein, the generating module 54 is configured to generate a duration random number, where the duration random number is used to indicate a duration of deferring the SDT; and after deferring the duration indicated by the SDT duration random number, generating a second transmission random number, wherein the second transmission random number is used for determining whether the UE is allowed to select to use the transmission resource of the SDT for the SDT. The determining module 51 is further configured to determine to select a transmission resource for SDT using the transmission resource of SDT if the second transmission random number generated by the generating module 54 satisfies the first condition. A stopping module 55, configured to stop the first timer and/or perform a reset operation on the first counter. The determining module 51 is further configured to determine to defer the SDT if the second transmission random number generated by the generating module 54 does not satisfy the first condition, and determine to cancel the SDT if the second condition is satisfied, where the second condition includes at least one of: the first timer is overtime, and the accumulated times of the first counter are larger than or equal to the maximum counting threshold value of the first counter.

In a possible implementation manner, with reference to fig. 6, as shown in fig. 7, the UE provided in the embodiment of the present invention may further include: a processing module 53. The processing module 53 is configured to start the second timer and/or perform 1-increment operation on the second counter if the determining module 51 determines to cancel the SDT.

In a possible implementation manner, the determining module 51 is further configured to determine the candidate cell according to the information of the neighbor cells supporting SDT received by the receiving module 52. With reference to fig. 7, as shown in fig. 9, the UE provided in the embodiment of the present invention may further include: an evaluation module 56, a stop module 55 and a rollback module 57. Wherein, the evaluating module 56 is configured to perform cell reselection evaluation on cells in the candidate cells determined by the determining module 51. The determining module 51 is further configured to determine, as the target cell, the first cell with the highest priority of the frequency points in the at least one first cell if the at least one first cell in the candidate cells meets the reselection condition. The processing module 53 is further configured to trigger the first SDT random access procedure in the target cell determined by the determining module 51. A stopping module 55 for stopping the second timer and/or performing a reset operation on the second counter. And a fallback module 57, configured to fallback to generate an RRC message to instruct the UE to trigger the random access procedure if the third condition is met. Wherein the reselection condition comprises at least one of: the cell meets reselection criteria and the SDT configuration parameter information meets trigger conditions corresponding to a first SDT random access process; the third condition includes at least one of: the second timer is overtime, and the accumulated times of the second counter is greater than or equal to the maximum counting threshold value of the second counter.

In a possible implementation manner, the evaluating module 56 is specifically configured to perform cell reselection evaluation on cells in the candidate cells sequentially from a high-priority frequency point according to the frequency point priorities received by the receiving module 52.

The UE provided in the embodiment of the present invention can implement each process implemented by the UE in the foregoing method embodiments, and for avoiding repetition, detailed descriptions are not repeated here.

The embodiment of the invention provides the UE, because the UE can determine whether to defer SDT or cancel SDT according to the randomly generated first transmission random number, namely, a plurality of UEs in a service cell can randomly generate a transmission random number, and determine whether to defer SDT or cancel SDT according to the generated transmission random number, but not directly select the transmission resource of the SDT for SDT, the number of the UEs which use the transmission resource of the SDT for SDT in the service cell can be reduced, and the transmission performance of the UE can be improved.

Fig. 10 shows a schematic diagram of a possible structure of a network device involved in the embodiment of the present invention. As shown in fig. 10, a network device 60 provided in an embodiment of the present invention may include: a sending module 61.

Wherein, the sending module 61 is configured to send configuration information to the UE, where the configuration information includes at least one of the following: the SDT transmission factor corresponding to each random access process type, the duration of the first timer, the duration of the second timer, the maximum counting threshold value of the first counter, the maximum counting threshold value of the second counter, the delay indication information and the information of the adjacent cell supporting the SDT. The first timer is used for indicating the time length of the SDT which allows the UE to determine to recover the postponement, the second timer is used for indicating the time length of the SDT which allows the UE to determine to recover the cancellation, the first counter is used for accumulating the times of the SDT which is determined to be postponed by the UE, the second counter is used for accumulating the times of cell reselection evaluation by the UE, and the postponing indication information is used for indicating the maximum time length of the SDT which allows the UE to determine to postpone; the information of the neighbor cells supporting the SDT includes at least one of: the identification of the neighbor cell of the serving cell where the UE is located, the SDT configuration parameter information of the neighbor cell of the serving cell where the UE is located, and the frequency point priority corresponding to the neighbor cell of the serving cell where the UE is located.

In a possible implementation manner, the SDT configuration parameter information may include at least one of the following: information whether the neighbor cell of the serving cell where the UE is located supports CP-SDT, information whether the neighbor cell of the serving cell where the UE is located supports UP-SDT, the SDT maximum allowable transmission block size of the neighbor cell of the serving cell where the UE is located, and random access resource parameters.

The network device provided by the embodiment of the present invention can implement each process implemented by the network device in the above method embodiments, and for avoiding repetition, detailed descriptions are not repeated here.

Embodiments of the present invention provide a network device, where the network device may send configuration information to configure a determination condition whether to defer or cancel SDT to a plurality of UEs in a serving cell, so that the plurality of UEs in the serving cell may determine whether to defer or cancel SDT according to the configuration information, rather than directly selecting a transmission resource of SDT for SDT, and thus, the number of UEs performing SDT using the transmission resource of SDT in the serving cell may be reduced, and the transmission performance of the UEs may be improved.

Fig. 11 shows a hardware schematic diagram of a UE according to an embodiment of the present invention. As shown in fig. 11, the UE110 includes but is not limited to: a radio frequency unit 111, a network module 112, an audio output unit 113, an input unit 114, a sensor 115, a display unit 116, a user input unit 117, an interface unit 118, a memory 119, a processor 120, and a power supply 121.

It should be noted that, as those skilled in the art will appreciate, the UE structure shown in fig. 11 does not constitute a limitation of the UE, and the UE may include more or less components than those shown in fig. 11, or combine some components, or arrange different components. For example, in the embodiment of the present invention, the UE includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The processor 120 is configured to determine whether to defer or cancel the SDT according to a first transmission random number when the UE triggers the first SDT random access procedure, where the first transmission random number is a random number generated by the UE.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 111 may be used for receiving and sending signals during a message sending and receiving process or a call process, and specifically, receives downlink data from a base station and then processes the received downlink data to the processor 120; in addition, the uplink data is transmitted to the base station. In general, radio frequency unit 111 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 111 may also communicate with a network and other devices through a wireless communication system.

The UE provides the user with wireless broadband internet access through the network module 112, such as helping the user send and receive e-mails, browse webpages, access streaming media, and the like.

The audio output unit 113 may convert audio data received by the radio frequency unit 111 or the network module 112 or stored in the memory 119 into an audio signal and output as sound. Also, the audio output unit 113 may also provide audio output related to a specific function performed by the UE110 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 113 includes a speaker, a buzzer, a receiver, and the like.

The input unit 114 is used to receive an audio or video signal. The input unit 114 may include a Graphics Processing Unit (GPU) 1141 and a microphone 1142, and the graphics processor 1141 processes image data of a still picture or a video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 116. The image frames processed by the graphic processor 1141 may be stored in the memory 119 (or other storage medium) or transmitted via the radio frequency unit 111 or the network module 112. The microphone 1142 may receive sound and may be capable of processing such sound into audio data. The processed audio data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 111 in case of the phone call mode.

The UE110 also includes at least one sensor 115, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor includes an ambient light sensor that adjusts the brightness of the display panel 1161 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 1161 and/or the backlight when the UE110 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), detect the magnitude and direction of gravity when stationary, and can be used to identify the UE attitude (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration), vibration identification related functions (such as pedometer, tapping), and the like; the sensors 115 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 116 is used to display information input by the user or information provided to the user. The display unit 116 may include a display panel 1161, and the display panel 1161 may be configured in the form of a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), or the like.

The user input unit 117 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the UE. Specifically, the user input unit 117 includes a touch panel 1171 and other input devices 1172. Touch panel 1171, also referred to as a touch screen, may collect touch operations by a user on or near it (e.g., user operations on or near touch panel 1171 using a finger, stylus, or any suitable object or accessory). Touch panel 1171 can include two portions, a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 120, receives a command from the processor 120, and executes the command. In addition, the touch panel 1171 can be implemented by various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1171, the user input unit 117 may also include other input devices 1172. Specifically, the other input devices 1172 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein.

Further, touch panel 1171 can be overlaid on display panel 1161, and when touch panel 1171 detects a touch operation thereon or nearby, the touch operation can be transmitted to processor 120 to determine the type of touch event, and then processor 120 can provide a corresponding visual output on display panel 1161 according to the type of touch event. Although in fig. 11, the touch panel 1171 and the display panel 1161 are two independent components to implement the input and output functions of the UE, in some embodiments, the touch panel 1171 and the display panel 1161 may be integrated to implement the input and output functions of the UE, and the implementation is not limited herein.

The interface unit 118 is an interface for connecting an external device to the UE 110. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 118 may be used to receive input from external devices (e.g., data information, power, etc.) and transmit the received input to one or more elements within the UE110 or may be used to transmit data between the UE110 and external devices.

The memory 119 may be used to store software programs as well as various data. The memory 119 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 119 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

The processor 120 is a control center of the UE, connects various parts of the entire UE using various interfaces and lines, performs various functions of the UE and processes data by operating or executing software programs and/or modules stored in the memory 119, and calling data stored in the memory 119, thereby performing overall monitoring of the UE. Processor 120 may include one or more processing units; optionally, the processor 120 may integrate an application processor and a modem processor, wherein the application processor mainly handles operating systems, user interfaces, application programs, and the like, and the modem processor mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 120.

UE110 may further include a power supply 121 (e.g., a battery) for supplying power to various components, and optionally, power supply 121 may be logically connected to processor 120 via a power management system, so as to implement functions of managing charging, discharging, and power consumption via the power management system.

In addition, the UE110 includes some functional modules that are not shown, and are not described herein again.

Optionally, an embodiment of the present invention further provides a UE, including a processor 120 as shown in fig. 11, a memory 119, and a computer program stored in the memory 119 and capable of running on the processor 120, where the computer program is executed by the processor 120 to implement the processes of the foregoing method embodiments, and can achieve the same technical effects, and details are not repeated here to avoid repetition.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 120 shown in fig. 11, the computer program implements the processes of the method embodiments, and can achieve the same technical effects, and in order to avoid repetition, the computer program is not described herein again. The computer-readable storage medium may be, for example, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.

Fig. 12 is a hardware schematic diagram of a network device according to an embodiment of the present invention. As shown in fig. 12, the network device 130 includes: a processor 131, a transceiver 132, a memory 133, a user interface 134, and a bus interface 135.

A transceiver 132 configured to transmit configuration information to the UE, the configuration information comprising at least one of: the SDT transmission factor corresponding to each random access process type, the duration of the first timer, the duration of the second timer, the maximum counting threshold value of the first counter, the maximum counting threshold value of the second counter, the delay indication information and the information of the adjacent cell supporting the SDT. The first timer is used for indicating the time length of the SDT which allows the UE to determine to recover the postponement, the second timer is used for indicating the time length of the SDT which allows the UE to determine to recover the cancellation, the first counter is used for accumulating the times of the SDT which is determined to be postponed by the UE, the second counter is used for accumulating the times of cell reselection evaluation by the UE, and the postponing indication information is used for indicating the maximum time length of the SDT which allows the UE to determine to postpone; the information of the neighbor cells supporting the SDT includes at least one of: the identification of the neighbor cell of the serving cell where the UE is located, the SDT configuration parameter information of the neighbor cell of the serving cell where the UE is located, and the frequency point priority corresponding to the neighbor cell of the serving cell where the UE is located.

Among other things, the processor 131 may be responsible for managing the bus architecture and general processing, and the processor 131 may be used to read and execute programs in the memory 133 to implement processing functions and control of the network device 130. The memory 133 may store data used by the processor 131 in performing operations. The processor 131 and the memory 133 may be integrated or may be provided separately.

In this embodiment of the present invention, the network device 130 may further include: a computer program stored on the memory 133 and executable on the processor 131, which computer program, when executed by the processor 131, performs the steps of the method provided by the embodiments of the present invention.

In fig. 12, the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 131 and various circuits of memory represented by memory 133 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further in connection with embodiments of the present invention. The bus interface 135 provides an interface. The transceiver 132 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different UEs, the user interface 134 may also be an interface capable of interfacing externally to a desired device, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

An embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor 131 shown in fig. 12, the computer program implements the processes of the method embodiment, and can achieve the same technical effect, and is not described herein again to avoid repetition. The computer readable storage medium is, for example, ROM, RAM, magnetic disk or optical disk.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A Small Data Transmission (SDT) processing method is applied to User Equipment (UE), and is characterized by comprising the following steps:

and under the condition that the UE triggers a first SDT random access process, determining whether to postpone the SDT or cancel the SDT according to a first transmission random number, wherein the first transmission random number is a random number generated by the UE.

2. The method of claim 1, wherein determining whether to defer or cancel the SDT based on the first transmitted nonce comprises:

if the first transmission random number meets a first condition, determining to select a transmission resource of the SDT for the SDT;

if the first transmission random number does not meet the first condition, determining to postpone or cancel the SDT;

wherein the first condition is: the first transmission random number is less than a first SDT transmission factor, the first SDT transmission factor being used to indicate a probability of allowing the UE to select SDT using SDT transmission resources;

or,

the first condition is: the first transmission random number is greater than or equal to a first SDT transmission factor, the first SDT transmission factor being used to indicate a probability that the UE is not allowed to select SDT using a transmission resource of SDT.

3. The method of claim 2, wherein prior to determining whether to defer or cancel SDT based on the first transmitted nonce, the method further comprises:

receiving configuration information sent by a network device, wherein the configuration information comprises at least one of the following items: SDT transmission factors corresponding to each random access process type, the time length of a first timer, the time length of a second timer, the maximum counting threshold value of a first counter, the maximum counting threshold value of a second counter, delay indication information and information of a neighbor cell supporting SDT;

the first timer is used for indicating the time length of allowing the UE to determine to recover the deferred SDT, the second timer is used for indicating the time length of allowing the UE to determine to recover the cancelled SDT, the first counter is used for accumulating the times of determining to delay the SDT by the UE, the second counter is used for accumulating the times of cell reselection evaluation by the UE, and the deferral indication information is used for indicating the maximum time length of allowing the UE to determine to delay the SDT; the information of the neighbor cell supporting the SDT includes at least one of: the identification of the neighbor cell of the serving cell where the UE is located, the SDT configuration parameter information of the neighbor cell of the serving cell where the UE is located, and the frequency point priority corresponding to the neighbor cell of the serving cell where the UE is located.

4. The method of claim 3, wherein the SDT configuration parameter information comprises at least one of: the information whether the neighbor cell of the serving cell where the UE is located supports the control plane CP-SDT, the information whether the neighbor cell of the serving cell where the UE is located supports the user plane UP-SDT, the SDT maximum allowable transmission block size of the neighbor cell of the serving cell where the UE is located, and the SDT random access resource parameter of the neighbor cell of the serving cell where the UE is located.

5. The method of claim 3, further comprising:

if the SDT is determined to be postponed, starting the first timer, and/or performing 1 accumulation operation on the first counter.

6. The method of claim 5, further comprising:

generating a duration random number, the duration random number being used to indicate a duration for deferring the SDT;

after deferring the duration indicated by the duration random number of the SDT, generating a second transmission random number, wherein the second transmission random number is used for determining whether the UE is allowed to select to use the transmission resource of the SDT for the SDT;

if the second transmission random number meets the first condition, determining to select a transmission resource of the SDT for SDT, stopping the first timer, and/or resetting the first counter;

determining to defer SDT if the second transmission random number does not satisfy the first condition;

determining to cancel the SDT if a second condition is satisfied, the second condition including at least one of: the first timer is overtime, and the accumulated times of the first counter are greater than or equal to the maximum counting threshold value of the first counter.

7. The method of claim 3 or 6, further comprising:

and if the SDT is determined to be cancelled, starting the second timer, and/or performing 1 accumulation operation on the second counter.

8. The method of claim 7, further comprising:

determining a candidate cell according to the information of the neighbor cell supporting the SDT;

performing cell reselection evaluation on cells in the candidate cells;

if at least one first cell in the candidate cells meets reselection conditions, determining a first cell with the highest priority of frequency points in the at least one first cell as a target cell, triggering the first SDT random access process in the target cell, stopping the second timer, and/or resetting the second counter;

if the third condition is met, generating a Radio Resource Control (RRC) message in a backspacing mode to indicate the UE to trigger a random access process;

wherein the reselection condition comprises at least one of: the cell meets reselection criteria and the SDT configuration parameter information meets trigger conditions corresponding to the first SDT random access process; the third condition includes at least one of: the second timer is overtime, and the accumulated times of the second counter is greater than or equal to the maximum counting threshold value of the second counter.

9. The method of claim 8, wherein the performing cell reselection evaluation on the cells in the candidate cells comprises:

and sequentially carrying out cell reselection evaluation on cells in the candidate cells from the high-priority frequency point according to the frequency point priority.

10. A small data transmission SDT processing method is applied to a network device and is characterized by comprising the following steps:

sending configuration information to a User Equipment (UE), wherein the configuration information comprises at least one of the following items: SDT transmission factors corresponding to each random access process type, the time length of a first timer, the time length of a second timer, the maximum counting threshold value of a first counter, the maximum counting threshold value of a second counter, delay indication information and information of a neighbor cell supporting SDT;

11. The method of claim 10, wherein the SDT configuration parameter information comprises at least one of: the information whether the neighbor cell of the serving cell where the UE is located supports the control plane CP-SDT, the information whether the neighbor cell of the serving cell where the UE is located supports the user plane UP-SDT, the SDT maximum allowable transmission block size of the neighbor cell of the serving cell where the UE is located, and the random access resource parameter.

12. A User Equipment (UE), the UE comprising: a determination module;

the determining module is configured to determine whether to defer or cancel the SDT according to a first transmission random number when the UE triggers a first small data transmission SDT random access procedure, where the first transmission random number is a random number generated by the UE.

13. The UE of claim 12, wherein the determining module is specifically configured to determine to select the SDT using the transmission resource of the SDT if the first transmission random number satisfies a first condition; or, if the first transmission random number does not satisfy the first condition, determining to postpone or cancel the SDT;

or,

14. The UE of claim 13, wherein the UE further comprises: a receiving module;

the receiving module is configured to receive configuration information sent by a network device before the determining module determines whether to defer or cancel the SDT according to the first transmission random number, where the configuration information includes at least one of: SDT transmission factors corresponding to each random access process type, the time length of a first timer, the time length of a second timer, the maximum counting threshold value of a first counter, the maximum counting threshold value of a second counter, delay indication information and information of a neighbor cell supporting SDT;

15. The UE of claim 14, wherein the SDT configuration parameter information comprises at least one of: the information whether the neighbor cell of the serving cell where the UE is located supports the control plane CP-SDT, the information whether the neighbor cell of the serving cell where the UE is located supports the user plane UP-SDT, the SDT maximum allowable transmission block size of the neighbor cell of the serving cell where the UE is located, and the SDT random access resource parameter of the neighbor cell of the serving cell where the UE is located.

16. The UE of claim 14, wherein the UE further comprises: a processing module;

the processing module is configured to start the first timer and/or perform 1-accumulation operation on the first counter if the determining module determines to postpone the SDT.

17. The UE of claim 16, wherein the UE further comprises: a generating module and a stopping module;

the generation module is used for generating a duration random number, and the duration random number is used for indicating the duration of delaying the SDT; after delaying the time length indicated by the time length random number of the SDT, generating a second transmission random number, wherein the second transmission random number is used for determining whether the UE is allowed to select to use the transmission resource of the SDT for the SDT;

the determining module is further configured to determine to select a transmission resource for SDT if the second transmission random number generated by the generating module satisfies the first condition;

the stopping module is used for stopping the first timer and/or resetting the first counter;

the determining module is further configured to determine to defer the SDT if the second transmission random number generated by the generating module does not satisfy the first condition; determining to cancel the SDT if a second condition is satisfied, the second condition including at least one of: the first timer is overtime, and the accumulated times of the first counter are greater than or equal to the maximum counting threshold value of the first counter.

18. The UE of claim 14 or 17, wherein the UE further comprises: a processing module;

and the processing module is configured to start the second timer and/or perform 1-accumulation operation on the second counter if the determining module determines to cancel the SDT.

19. The UE of claim 18, wherein the determining module is further configured to determine a candidate cell according to the information of the neighbor cell supporting SDT received by the receiving module;

the UE further comprises: the system comprises an evaluation module, a stopping module and a backspacing module;

the evaluation module is configured to perform cell reselection evaluation on cells in the candidate cells determined by the determination module;

the determining module is further configured to determine, if at least one first cell in the candidate cells meets a reselection condition, a first cell with a highest priority of frequency points in the at least one first cell as a target cell;

the processing module is further configured to trigger the first SDT random access procedure in the target cell determined by the determining module;

the stopping module is used for stopping the second timer and/or resetting the second counter;

the fallback module is configured to fallback to generate a radio resource control RRC message to indicate the UE to trigger a random access procedure if a third condition is met;

20. The UE of claim 19, wherein the evaluation module is specifically configured to perform cell reselection evaluation on cells in the candidate cells sequentially from a high-priority frequency point according to the priorities of the frequency points received by the receiving module.

21. A network device, characterized in that the network device comprises: a sending module;

the sending module is configured to send configuration information to a user equipment UE, where the configuration information includes at least one of: transmitting SDT transmission factors, the time length of a first timer, the time length of a second timer, the maximum counting threshold value of a first counter, the maximum counting threshold value of a second counter, delay indication information and information of a neighbor cell supporting SDT corresponding to each random access process type;

22. The network device of claim 21, wherein the SDT configuration parameter information comprises at least one of: the information whether the neighbor cell of the serving cell where the UE is located supports the control plane CP-SDT, the information whether the neighbor cell of the serving cell where the UE is located supports the user plane UP-SDT, the SDT maximum allowable transmission block size of the neighbor cell of the serving cell where the UE is located, and the random access resource parameter.

23. A user equipment, UE, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the small data transmission, SDT, processing method as claimed in any one of claims 1 to 9.

24. A network device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the small data transfer SDT processing method as claimed in claim 10 or 11.

25. A communication system, characterized in that the communication system comprises a user equipment, UE, according to any of claims 12 to 20, and a network device according to claim 21 or 22; or,

the communication system comprises the UE of claim 23 and the network device of claim 24.

26. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the small data transmission SDT processing method according to any one of claims 1 to 11.