WO2020199022A1 - 选择随机接入类型的方法及装置 - Google Patents

选择随机接入类型的方法及装置 Download PDF

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Publication number
WO2020199022A1
WO2020199022A1 PCT/CN2019/080644 CN2019080644W WO2020199022A1 WO 2020199022 A1 WO2020199022 A1 WO 2020199022A1 CN 2019080644 W CN2019080644 W CN 2019080644W WO 2020199022 A1 WO2020199022 A1 WO 2020199022A1
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Prior art keywords
random access
type
access process
step random
user equipment
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PCT/CN2019/080644
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English (en)
French (fr)
Inventor
路杨
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富士通株式会社
路杨
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Priority to PCT/CN2019/080644 priority Critical patent/WO2020199022A1/zh
Publication of WO2020199022A1 publication Critical patent/WO2020199022A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to the field of communications, and in particular to a method and device for selecting a random access type.
  • the mMTC scenario requires a low-cost, low-signaling overhead, low-latency, and low-power communication system, because a large number of uplink small data packet bursts generated by massive machine communication terminal equipment need to be sent to the network through random access.
  • the air interface signaling overhead and transmission delay are relatively large; similarly, the business in the uRLLC scenario is mainly periodic or event triggered For small data packets, random access is used to send uplink data with high probability.
  • the existing 4-step random access cannot meet the requirements of low signaling overhead and low latency; for vehicle-to-vehicle V2V (Vehicle-to-Vehicle) and mobile broadband There may also be small packet services in the enhanced eMBB (Enhance Mobile Broadband) application scenario, and transmission under the existing 4-step random access method is also inefficient.
  • eMBB Enhance Mobile Broadband
  • LBT Listen Before Talk
  • UE User Equipment
  • Fig. 1 is a schematic diagram of the existing 4-step contention-based random access (CBRA) process.
  • the UE selects the CBRA preamble, and sends the preamble, namely Msg1, to the gNB as a network device in the contention-based random access opportunity (Random access Occasion, RO) pre-configured by the system;
  • Step 2 After receiving the preamble, the gNB sends a random access response (Random Access Response, RAR), namely Msg2, authorizes the UE sending the preamble to have a dedicated uplink PUSCH (Physical Uplink Shared CHannel) resource and allocates a temporary CRNTI (Cell Radio Network Temmporary Identify) and indicate the PUSCH uplink advance;
  • UE sends Msg3 carrying signaling or data on the PUSCH resource;
  • step 4 gNB sends contention resolution signaling Msg4 for Msg3 to UE .
  • embodiments of the present invention provide a method and device for selecting a random access type.
  • an apparatus for selecting a random access type the apparatus is applied to a user equipment side, and the apparatus includes: a first selection unit configured to select a type of random access process And a first access unit, which is used to perform random access using the selected type of random access process; wherein, the type of the random access process includes a 4-step random access process or 2 4-step random access process.
  • an apparatus for selecting a random access type is provided.
  • the apparatus is applied to a network equipment side.
  • the apparatus includes: a first sending unit configured to send and select random access to user equipment.
  • the information related to the type of the access process enables the user equipment to select the type of the random access process according to the information, and use the selected type of random access process to perform random access; wherein Types include 4-step random access process or 2-step random access process.
  • a user equipment is provided, and the user equipment includes the apparatus according to the first aspect of the embodiments of the present invention.
  • a network device including the apparatus according to the second aspect of the embodiments of the present invention.
  • a communication system including the network device according to the third aspect of the embodiments of the present invention and/or the network device according to the fourth aspect of the embodiments of the present invention Network equipment.
  • a method for selecting a random access type is applied to a user equipment side.
  • the method includes: selecting a type of a random access procedure; and using selected random access
  • the type of the process is random access; wherein, the type of the random access process includes a 4-step random access process or a 2-step random access process.
  • a method for selecting a random access type is applied to a network device side, and the method includes: sending information related to selecting a type of random access process to a user equipment , So that the user equipment selects the type of random access process according to the information, and uses the selected type of random access process to perform random access; wherein, the type of the random access process includes 4 steps (4-step ) Random access process or 2-step (4-step) random access process.
  • a computer-readable program wherein when the program is executed in an apparatus or user equipment for selecting a random access type, the program causes the selection of a random access type
  • the device or user equipment in the implementation of the method for selecting the random access type described in the sixth aspect of the embodiment of the present invention.
  • a storage medium storing a computer-readable program, wherein the computer-readable program enables an apparatus or user equipment to select a random access type to execute the sixth embodiment of the present invention.
  • a computer-readable program wherein when the program is executed in an apparatus or network device for selecting a random access type, the program causes the selection of a random access type
  • the apparatus or network equipment in the implementation of the method for selecting the random access type described in the seventh aspect of the embodiment of the present invention.
  • a storage medium storing a computer-readable program, wherein the computer-readable program enables an apparatus or network device to select a random access type to execute the first step The method for selecting the random access type described in the seventh aspect.
  • the beneficial effect of the embodiments of the present invention is that by selecting the type of random access process and performing random access using the selected random access process type, a random access type selection mechanism is provided, which can be selected according to actual conditions. And use the appropriate type of random access process, so it can increase the success rate of random access, shorten data transmission delay, and improve system performance.
  • FIG. 1 is a schematic diagram of the existing 4-step contention-based random access (CBRA) process
  • Figure 2 is a schematic diagram of a 2-step random access process
  • FIG. 3 is a schematic diagram of the process of converting to 4-step random access when random access is initiated and the 2-step random access process is not completed;
  • Figure 4 is a schematic diagram of a communication system according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a method for selecting a random access type according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of an example of a random access process in Embodiment 1 of the present invention.
  • FIG. 7 is a schematic diagram of another example of a random access process in Embodiment 1 of the present invention.
  • FIG. 8 is a schematic diagram of a method for selecting a random access type according to Embodiment 2 of the present invention.
  • FIG. 9 is a schematic diagram of a method for selecting a random access type according to Embodiment 3 of the present invention.
  • FIG. 10 is another schematic diagram of a method for selecting a random access type according to Embodiment 3 of the present invention.
  • FIG. 11 is a schematic diagram of an apparatus for selecting a random access type according to Embodiment 4 of the present invention.
  • FIG. 12 is a schematic diagram of the first selection unit of Embodiment 4 of the present invention.
  • FIG. 13 is a schematic diagram of a second selection unit of Embodiment 4 of the present invention.
  • FIG. 14 is a schematic diagram of an apparatus for selecting a random access type according to Embodiment 5 of the present invention.
  • FIG. 15 is a schematic block diagram of the system configuration of user equipment according to Embodiment 6 of the present invention.
  • FIG. 16 is a schematic diagram of a structure of a network device according to Embodiment 7 of the present invention.
  • the terms “first”, “second”, etc. are used to distinguish different elements in terms of numelations, but they do not indicate the spatial arrangement or temporal order of these elements. These elements should not be used by these terms. Limited.
  • the term “and/or” includes any and all combinations of one or more of the associated listed terms.
  • the terms “comprising”, “including”, “having” and the like refer to the existence of the stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.
  • the term "communication network” or “wireless communication network” can refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), and Enhanced Long Term Evolution (LTE-A, LTE-A). Advanced), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), High-Speed Packet Access (HSPA, High-Speed Packet Access), etc.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-A
  • LTE-A LTE-A
  • Advanced Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • High-Speed Packet Access High-Speed Packet Access
  • HSPA High-Speed Packet Access
  • the communication between devices in the communication system can be carried out according to any stage of communication protocol, for example, it can include but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and future 5G, New Radio (NR, New Radio), etc., and/or other currently known or future communication protocols.
  • Network device refers to, for example, a device in a communication system that connects user equipment to a communication network and provides services for the user equipment.
  • Network equipment may include but not limited to the following equipment: base station (BS, Base Station), access point (AP, Access Point), transmission and reception point (TRP, Transmission Reception Point), broadcast transmitter, mobile management entity (MME, Mobile Management Entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller), etc.
  • the base station may include but is not limited to: Node B (NodeB or NB), evolved Node B (eNodeB or eNB), 5G base station (gNB), etc., and may also include remote radio head (RRH, Remote Radio Head) , Remote Radio Unit (RRU, Remote Radio Unit), relay (relay) or low-power node (such as femto, pico, etc.).
  • NodeB Node B
  • eNodeB or eNB evolved Node B
  • gNB 5G base station
  • RRH Remote Radio Head
  • RRU Remote Radio Unit
  • relay relay
  • low-power node such as femto, pico, etc.
  • base station can include some or all of their functions, and each base station can provide communication coverage for a specific geographic area.
  • the term "cell” may refer to a base station and/or its coverage area, depending on the context in which the term is used.
  • the term "User Equipment” refers to, for example, a device that accesses a communication network through a network device and receives network services, and may also be referred to as "Terminal Equipment” (TE, Terminal Equipment).
  • the terminal device may be fixed or mobile, and may also be called a mobile station (MS, Mobile Station), terminal, subscriber station (SS, Subscriber Station), access terminal (AT, Access Terminal), station, etc.
  • terminal devices may include but are not limited to the following devices: cellular phones (Cellular Phone), personal digital assistants (PDAs, Personal Digital Assistant), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, Cordless phones, smart phones, smart watches, digital cameras, etc.
  • cellular phones Cellular Phone
  • PDAs personal digital assistants
  • wireless modems wireless communication devices
  • handheld devices machine-type communication devices
  • laptop computers Cordless phones
  • smart phones smart watches, digital cameras, etc.
  • a terminal device may also be a machine or device that performs monitoring or measurement.
  • it may include, but is not limited to: Machine Type Communication (MTC) terminals, Vehicle-mounted communication terminals, device to device (D2D, Device to Device) terminals, machine to machine (M2M, Machine to Machine) terminals, etc.
  • MTC Machine Type Communication
  • D2D Device to Device
  • M2M Machine to Machine
  • 2-step random access and non-orthogonal multiple access technologies are general solutions for reducing random access signaling overhead and time delay, which can be used in the random access process.
  • frequent small data packet random burst services require low latency and low power consumption.
  • it is generally applicable to random access of unlicensed spectrum and licensed spectrum.
  • FIG. 2 is a schematic diagram of a 2-step random access process.
  • the UE in the 2-step CBRA, in the first step, the UE sends MsgA.
  • MsgA contains the CBRA preamble and data part.
  • the UE sends the MsgA preamble in the competing RO and sends the MsgA signaling or in the competing PUSCH resources.
  • the gNB sends MsgB after receiving MsgA, and sends random access response and contention resolution messages to the UE. It can be seen that the UE can realize free uplink scheduling transmission during the random access process, upload signaling or service packages in one step, and reduce random access signaling and delay.
  • the gNB demodulates the MsgA data through the demodulation reference signal (DMRS, Demodulation Reference Signal) that is also sent on the PUSCH resource of the MsgA data.
  • DMRS demodulation reference signal
  • the DMRS sequence is related to the preamble index (Index) of the MsgA sent by the UE.
  • the DMRS corresponding to the preamble index is obtained by the called preamble. Therefore, if multiple UEs select different preamble indexes during 2-step CBRA and transmit MsgA data on the same PUSCH, the gNB can demodulate the MsgA data according to the DMRS corresponding to the preamble index.
  • multiple UEs in 2-step random access can share the resources for sending MsgA data.
  • the UE determines the PUSCH resource for sending MsgA data according to the randomly selected preamble and RO. If the channel condition is poor, it will be on the base station side. The probability of successfully demodulating the PUSCH is reduced, and the 2-step random access fails. At this time, the transmission delay and transmission efficiency of the UE using 2-step random access will be worse than the UE using 4-step random access.
  • the gNB cannot successfully demodulate the MsgA preamble or MsgA data. In this case, 2 Random access failed. If the network conflict situation persists, the UE may fail to access the network in the 2-step random access mode again, increasing the transmission delay, and you can consider letting the UE fall back to 4-step random access.
  • FIG. 3 is a schematic diagram of the process of converting to 4-step random access when random access is initiated and the 2-step random access process is not completed.
  • the gNB when the gNB successfully demodulates the preamble of MsgA, but fails to demodulate the data of the MsgA, the gNB will send a 4-step random access random access response to the UE, namely Msg2, to make the UE retransmit The data part of MsgA, namely Msg3.
  • FIG. 4 is a schematic diagram of a communication system according to an embodiment of the present invention, which schematically illustrates a case where user equipment and network equipment are taken as an example.
  • the communication system 100 may include: a network equipment 101 and a user equipment 102.
  • FIG. 4 only uses one user equipment as an example for illustration.
  • the network device 101 is, for example, a network device gNB of NR.
  • eMBB enhanced mobile broadband
  • mMTC large-scale machine type communication
  • URLLC Ultra-Reliable and Low- Latency Communication
  • the user equipment 102 may send data to the network device 101, for example, initiate a random access procedure.
  • the embodiment of the present invention provides a method for selecting a random access type, and the method is applied to the user equipment side.
  • FIG. 5 is a schematic diagram of a method for selecting a random access type according to Embodiment 1 of the present invention. As shown in FIG. 5, the method includes:
  • Step 501 Select the type of random access procedure.
  • Step 502 Use the selected random access process type to perform random access.
  • the types of random access procedures include 4-step random access procedures or 2-step random access procedures.
  • a random access type selection mechanism is provided, which can select and use appropriate random access according to the actual situation
  • the type of the process can therefore increase the success rate of random access, shorten the data transmission delay, and improve system performance.
  • the 4-step random access process can be an existing 4-step random access process, for example, see the process shown in FIG. 1; it can also be the initiation of random access.
  • the 2-step random access process is entered and the 2-step random access process is not completed, it is converted to a 4-step random access situation. For example, refer to the process shown in FIG. 3.
  • the 2-step random access process can refer to the process shown in FIG. 2, for example.
  • random access procedures in the embodiment of the present invention may also include 4-step random access procedures and other random access procedures other than 2-step random access procedures.
  • the user equipment selects the type of random access process, for example, the user equipment independently selects the type of random access process; or, selects random access according to the information sent by the network equipment related to the selection of the random access process type The type of process.
  • the user equipment can select the type of random access process according to the channel quality between the network equipment and the user equipment, or it can also be based on the modulation and coding scheme (MCS) of the MsgA data,
  • MCS modulation and coding scheme
  • the data size of the MAC layer of the MsgA or the physical resource size occupied by the MsgA data select the type of random access process.
  • the 2-step random access procedure is selected when the channel quality meets the first preset condition
  • the 4-step (2-step) random access procedure is selected.
  • the first preset condition may be at least one of the following conditions: the path loss from the network device to the user equipment is less than the first threshold; the RSRP (Reference Signal Receiving Power) of the reference signal sent by the network device The value is higher than the second threshold; and the RSRQ (Reference Signal Receiving Quality) value of the reference signal sent by the network device is higher than the third threshold; wherein, the reference signal includes a synchronization reference signal (Synchronization Signals Reference Signal, SS-RS) or channel state information reference signal (CSI Reference Signal, CSI-RS).
  • SS-RS Synchronization Signals Reference Signal
  • CSI Reference Signal Channel state information reference signal
  • the specific values of the first threshold, the second threshold, and the third threshold may be determined according to actual conditions.
  • the first threshold used to determine the path loss is the difference between the maximum transmit power allowed by the UE and the target received power of MsgA PUSCH.
  • the first threshold can be calculated according to the formula PCMAX–MsgAPUSCHReceivedTargetPower, where PCMAX is the UE’s
  • the maximum allowable transmit power in the cell that initiates random access, MsgAPUSCHReceivedTargetPower is the target received power of MsgA PUSCH.
  • the target received power can be calculated based on the target received power of the MsgA preamble and the deviation of the target received power of the MsgA PUSCH compared to the MsgA Preamble, that is, calculated by the following formula (1):
  • MsgAPUSCHReceivedTargetPower MsgApreambleReceivedTargetPower+MsgAPUSCHDeltaPreamble (1)
  • MsgApreambleReceivedTargetPower represents the target received power of the MsgA preamble
  • MsgAPUSCHDeltaPreamble represents the deviation of the target received power of the MsgA PUSCH compared to the MsgA preamble.
  • the above-mentioned various parameters such as at least one of PCMAX, MsgApreambleReceivedTargetPower, MsgAPUSCHDeltaPreamble, etc., which are required when calculating the first threshold, can be sent to the UE by the network device through system information.
  • first threshold, second threshold, and third threshold may be configured by the network device for the UE, or may be calculated by the UE according to parameters sent by the network device.
  • the type of random access process is selected according to the modulation and coding method (MCS) of MsgA data
  • MCS modulation and coding method
  • the 4-step random access procedure is selected.
  • the 2-step random access process is selected when the modulation and coding mode of the uplink data is less than or equal to the fourth threshold.
  • the fourth threshold may be determined according to actual conditions.
  • different fourth thresholds may be set, that is, the fourth threshold may correspond to MsgA PUSCH resources.
  • the uplink data is, for example, PUSCH.
  • the MCS required for MsgA data can be determined according to the MAC layer data size of MsgA, and the UE can be based on the mapping between the MCS level set for the PUSCH resource and the MAC layer data size Relationship to determine the MCS that MsgA PUSCH data needs to use.
  • the fourth threshold may be determined according to the channel quality between the network device and the UE. If the MCS to be used is greater than the fourth threshold of the PUSCH resource, the 2-step random access process is not selected.
  • the size of the MAC layer data of MsgA is CCCH SDU plus MAC subheader; for random access triggered by uplink data, the size of the MAC layer data of MsgA The size is the uplink data plus the CRNTI MAC CE size plus the MAC subheader.
  • the MCS needed for MsgA data can be determined according to the channel quality between the network device and the UE, for example, according to the RSRP or RSRQ value of the reference signal SS-RS or CSI-RS sent by the network device.
  • the 4-step random access procedure is selected when the data size of the MAC layer of MsgA to be transmitted is greater than the fifth threshold.
  • the 2-step random access process is selected.
  • the fifth threshold may be determined according to actual conditions.
  • different fifth thresholds may be set, that is, the fifth threshold may correspond to MsgA PUSCH resources.
  • the size of MAC layer data is CCCH SDU plus MAC subheader
  • the size of MAC layer data is uplink data Add the size of CRNTI MAC CE plus MAC subheader.
  • the 2-step random access process is selected when the number of physical resource blocks that the MsgA data needs to occupy is less than or equal to the fifteenth threshold.
  • the fifteenth threshold is, for example, the number of PRBs of PUSCH resources.
  • the size of the PUSCH resource may correspond to the MsgA PUSCH resource.
  • the number of physical layer resource blocks that MsgA data needs to occupy can be determined according to the size of the MAC layer data of the MsgA and the MCS to be used.
  • the UE may determine the MCS to be used according to the channel quality between the network equipment and the UE, and then determine the number of PRBs that MsgA data needs to occupy according to the MCS and the MAC layer data size of the MsgA to be used. If the number of PRBs that MsgA data needs to occupy is greater than the number of PRBs of the PUSCH resource, the 2-step random access process is not selected.
  • the size of the MAC layer data of MsgA is CCCH SDU plus MAC subheader; for random access triggered by uplink data, the size of MsgA
  • the size of the MAC layer data is the uplink data plus the CRNTI MAC CE size plus the MAC subheader.
  • the user equipment selects the type of random access process according to the information sent by the network equipment and related to the selection of the random access process type:
  • the information related to the selection of the random access process type can be sent through system broadcast information or random access response.
  • the random access response may include an instruction to send a 4-step random access Msg3 random access response (ie, Msg2) or a 2-step random access response MsgB message.
  • the information related to selecting the type of the random access process may indicate the type of the random access process in an explicit or implicit manner.
  • the information related to the selection of the random access process type includes the probability value of the UE to select 2-step random access.
  • the UE side When the UE initiates random access or is in progress, the UE side generates a random number. When the random number is less than the probability value, the UE can choose 2-step random access.
  • the information related to the selection of the random access process type may be backoff indication information or backoff 4-step random access indication information sent by the network device in the random access response MAC layer PDU, or the network The fallback 4-step random access indication information sent by the device in the system broadcast information. For example, after the UE initiates random access and the ongoing 2-step random access process is not completed, it sends the preamble and data of the MsgA for 2-step random access to the network device and receives the above information. When at least one type of information is selected, the preamble of the 4-step random access is sent subsequently.
  • the above describes how the UE selects the type of random access procedure.
  • the following describes when the UE selects the type of random access procedure.
  • the UE may select the type of random access process when initiating random access, or, after initiating random access and the random access process is not completed, select the type of random access process to continue subsequently .
  • the initiation of random access is triggered by the MAC layer uplink service data or the CCCH data sent by the RRC layer.
  • the RRC layer of the UE in the idle state triggers the initial random access process when sending CCCH and SDU to the MAC layer, or the MAC layer triggers the random access process in the connected state when the UE sends uplink data in the connected state.
  • the UE may also select the type of random access process to continue after initiating random access and when the random access process is not completed, for example, after initiating random access, the ongoing 2
  • the 2-step random access process is not completed, choose to follow the 4-step random access process, for example, choose to send the preamble (Msg1) for 4-step random access. ) Or send a 4-step random access Msg3.
  • the random access response from the network device is not received, and the random access response includes instructions to send 4-step random access Msg3 random access response or 2-step random access response MsgB message;
  • the number of times of sending 2-step random access preamble reaches the sixth threshold
  • the power of sending the 2-step random access preamble reaches the seventh threshold
  • the power of the PUSCH data for sending the MsgA message reaches the eighth threshold.
  • the values of the sixth threshold, the seventh threshold, and the eighth threshold may be determined according to actual conditions.
  • the information related to the 4-step random access process sent by the network device may include: backoff indication information or backoff sent by the network device in the random access response MAC layer PDU 4-step random access indication information, or fallback 4-step random access indication information sent by the network device in system broadcast information.
  • two or more of the above situations can be combined. For example, after the UE sends the preamble and data of Msg A for 2-step random access to the network device, it does not receive the random data from the network device. Access response.
  • the random access response includes an instruction to send a 4-step random access Msg3 random access response or a 2-step random access response MsgB message, or the UE sends a 2-step random access response to the network device.
  • the preamble and data of the accessed MsgA receive a 2-step random access response MsgB message from the network device, but the contention resolution information contained in the MsgB message is the same as the MsgA sent to the network device
  • the PUSCH data of the message does not match, and the UE receives the information related to the selection of the random access process type sent by the network device, for example, it receives the backoff indication subPDU ( BI subPDU). In this case, the UE chooses to select the 4-step random access PRACH resource to send the preamble and waits to receive the 4-step random access Msg2.
  • the UE when the UE receives the backoff instruction contained in the random access response MAC PDU, it sets the current backoff parameter (PREAMBLE_BACKOFF) to the BI value in the received backoff instruction subPDU, and randomly generates one between 0 and PREAMBLE_BACKOFF Evenly distributed random time, after the random access time, the 4-step preamble is sent in the 4-step random access RO.
  • PREAMBLE_BACKOFF the current backoff parameter
  • the random access is initiated and the ongoing 2-step random access process is not completed, it is selected to subsequently send the 4-step random access Msg3, For example, after sending an MsgA message containing the preamble and data to a network device, receiving an instruction from the network device to send a 4-step random access response to Msg3, choose to send a 4-step random access response (4-step). step) Msg3 for random access.
  • the sent Msg3 of the 4-step random access includes the data in the sent MsgA message.
  • FIG. 6 is a schematic diagram of an example of a random access process in Embodiment 1 of the present invention.
  • two UEs simultaneously send the MsgA preamble, that is, preamble a/b, on a PRACH RO, and send MsgA data on the PUSCH corresponding to the PRACH.
  • the network equipment detects the collision on the RO and successfully detects the preamble a sent by the UE a, but does not detect the preamble b sent by the UE b.
  • the network equipment fails to successfully decode the MsgA data sent by the UE a.
  • the network device sends a 4-step random access response for the UE a in the random access response MAC PDU, that is, Msg2; and, the network device includes a backoff indication in the random response MAC PDU.
  • the UE a receives the 4-step random access response and resends the MsgA data, which is Msg3; and the UE b does not receive the 4-step random access response (Msg2) nor MsgB, and receives the backoff Instruct to send the 4-step random access preamble, namely Msg1.
  • FIG. 7 is a schematic diagram of another example of the random access process in Embodiment 1 of the present invention.
  • two UEs simultaneously send the MsgA preamble, namely preamble a/b, on a PRACH RO, and send MsgA data on the PUSCH corresponding to the PRACH and preamble;
  • the network device detects the collision on the RO , And successfully detected the preamble a sent by the UE a, but did not detect the preamble b sent by the UE b.
  • the network device successfully decoded the MsgA data corresponding to preamlbe a, but the decoded MsgA data came from other UEs and was not sent by UE a MsgA data; the network device sends a 2-step random access response MsgB for other UEs in the random access response MAC PDU, and the network device includes a backoff indication in the random access MAC PDU.
  • the UE a receives the random access response MsgB, the contention resolution information in it does not match the sent MsgA data, and it receives the back-off indication, and sends the 4-step random access preamble, namely Msg1; b Since neither the 4-step random access response nor the MsgB is received, and the backoff instruction is received, the 4-step random access preamble, namely Msg1, is also sent.
  • the random access process in addition to the example of selecting the type of random access after the random access is initiated and the random access process is not completed, it can also be: after the random access is initiated, and the process is in progress. If the 2-step random access process is not completed, select the subsequent 2-step random access process; or, after initiating random access, the 4-step random access process is in progress. ) When the random access process is not completed, select the subsequent 4-step random access process.
  • the random access response from the network device is not received;
  • the number of times of sending 2-step random access preamble reaches the ninth threshold
  • the power of transmitting the 2-step random access preamble reaches the tenth threshold
  • the power of the PUSCH data for sending the MsgA message reaches the eleventh threshold.
  • the random access response from the network device is not received;
  • the 4-step random access contention resolution message from the network device is received, but the information contained in the contention resolution message is different from the information contained in the contention resolution message.
  • the Msg3 message sent by the network device does not match;
  • the number of sending 4-step random access preambles reaches the twelfth threshold
  • the power of sending 4-step random access preamble reaches the thirteenth threshold
  • the power for sending Msg3 messages reaches the fourteenth threshold.
  • the values of the ninth threshold to the thirteenth threshold may be determined according to actual conditions.
  • a random access type selection mechanism is provided, which can be selected and used according to the actual situation. Therefore, it can improve the success rate of random access, shorten the data transmission delay, and improve the system performance.
  • the embodiment of the present invention provides a method for selecting a random access type, and the method is applied to the network device side. It corresponds to the method for selecting the random access type applied to the user equipment side described in Embodiment 1. For the same or related content, please refer to the description in Embodiment 1.
  • FIG. 8 is a schematic diagram of a method for selecting a random access type according to Embodiment 2 of the present invention. As shown in Figure 8, the method includes:
  • Step 801 Send information related to selecting the type of random access process to the user equipment, so that the user equipment selects the type of random access process according to the information, and uses the selected type of random access process to perform random access;
  • the type of the random access process includes a 4-step random access process or a 2-step random access process.
  • the sending information related to the type of random access procedure selection to the user equipment includes: before the user equipment initiates random access, sending information related to the type of the random access procedure selection to the user equipment Information to enable the user equipment to select the type of random access process when initiating random access; or, after the user equipment initiates random access and the random access process is not completed, send and select random access to the user equipment Enter the information related to the process type so that the user equipment selects the subsequent random access process to continue.
  • the method may further include:
  • Step 802 According to the collision situation of physical random access channel (PRACH) resources of 2-step random access and 4-step random access and/or 2-step random access.
  • PRACH physical random access channel
  • PUSCH physical uplink data channel
  • the information related to the selection of the random access process type can be sent through system broadcast information or random access response.
  • the information related to the selection of the random access process type indicates the type of the random access process in an explicit or implicit manner.
  • sending information related to the selection of the random access process type to the user equipment includes: initiating random access on the user equipment After entering, and the ongoing 2-step random access process is not completed, the information related to the selection of the random access process type is sent to the user equipment, so that the user equipment selects the subsequent 4-step random access process Access process.
  • the sending information related to the selection of the random access process type to the user equipment includes: after receiving the preamble of the random access MsgA message sent by the user equipment, sending and selecting to the user equipment Information related to the 4-step random access process, so that the user equipment chooses to subsequently send a 4-step random access preamble.
  • the information related to selecting a 4-step random access process may include: back-off indication information or back-off 4-step random access indication information sent in the random access response MAC layer PDU, or, The fallback 4-step random access indication information sent by the network device in the system broadcast information.
  • the sending information related to the selection of the random access process type to the user equipment includes: after receiving the preamble of the 2-step random access MsgA message sent by the user equipment, Send information related to the selection of a 4-step random access process to the user equipment, so that the user equipment selects to subsequently send the 4-step random access Msg3.
  • the information related to selecting a 4-step random access process may include: instructing to send a 4-step random access Msg3 random access response.
  • a random access type selection mechanism is provided, which can be selected and used according to the actual situation. Therefore, it can improve the success rate of random access, shorten the data transmission delay, and improve the system performance.
  • the embodiment of the present invention provides a method for selecting a random access type.
  • the method is applied to the network equipment side and the user equipment side, which corresponds to the selection of random access applied to the user equipment side described in Embodiment 1.
  • the same or related content can be referred to the description in Embodiment 1 and Embodiment 2.
  • FIG. 9 is a schematic diagram of a method for selecting a random access type according to Embodiment 3 of the present invention. As shown in Figure 9, the method includes:
  • Step 901 According to the collision situation of physical random access channel (PRACH) resources of 2-step random access and 4-step random access and/or 2-step random access The demodulation of the incoming physical uplink data channel (PUSCH), and determine to send information related to the selection of the random access process type to the user equipment;
  • PRACH physical random access channel
  • PUSCH physical uplink data channel
  • Step 902 Send information related to selecting the type of random access procedure to the user equipment
  • Step 903 The user equipment selects the type of random access procedure according to the information related to the type of selection of the random access procedure.
  • Step 904 Use the selected random access process type to perform random access.
  • FIG. 10 is another schematic diagram of a method for selecting a random access type according to Embodiment 3 of the present invention. As shown in Figure 10, the method includes:
  • Step 1001 The user equipment independently selects the type of random access process
  • Step 1002 Use the selected random access process type to perform random access.
  • a random access type selection mechanism is provided, which can be selected and used according to the actual situation. Therefore, it can improve the success rate of random access, shorten the data transmission delay, and improve the system performance.
  • the embodiment of the present invention provides a device for selecting a random access type, and the device can be configured on the user equipment side. Since the principle of the device to solve the problem is similar to the method of embodiment 1, its specific implementation can refer to the implementation of the method of embodiment 1, and the same content or related parts will not be repeated.
  • FIG. 11 is a schematic diagram of an apparatus for selecting a random access type according to Embodiment 4 of the present invention. As shown in FIG. 11, the apparatus 1100 includes:
  • the first selection unit 1101 is used to select the type of random access procedure.
  • the first access unit 1102 is used to perform random access using the selected type of random access procedure
  • the type of the random access process includes a 4-step random access process or a 2-step random access process.
  • FIG. 12 is a schematic diagram of the first selection unit of Embodiment 4 of the present invention. As shown in FIG. 12, the first selection unit 1101 includes:
  • the second selection unit 1201 is used to independently select the type of random access procedure; or,
  • the third selection unit 1202 is configured to select the type of random access process according to the information related to the selection of the random access process type sent by the network device.
  • FIG. 13 is a schematic diagram of the second selection unit according to Embodiment 4 of the present invention. As shown in FIG. 13, the second selection unit 1201 includes:
  • the fourth selection unit 1301 is configured to select the type of random access procedure according to the channel quality between the network equipment and the user equipment, or,
  • the fifth selection unit 1302 which is used to select the type of random access process according to the modulation and coding scheme (MCS) of MsgA data in the 2-step random access process, the size of the MAC layer data of MsgA, or the size of physical resources occupied by the MsgA data .
  • MCS modulation and coding scheme
  • a random access type selection mechanism is provided, which can be selected and used according to the actual situation. Therefore, it can improve the success rate of random access, shorten the data transmission delay, and improve the system performance.
  • the embodiment of the present invention provides a device for selecting a random access type, and the device can be configured on the network device side. Since the principle of the device to solve the problem is similar to the method of embodiment 2, its specific implementation can refer to the implementation of the method of embodiment 2, and the same content or related parts will not be repeated.
  • FIG. 14 is a schematic diagram of an apparatus for selecting a random access type according to Embodiment 5 of the present invention. As shown in FIG. 14, the apparatus 1400 includes:
  • the first sending unit 1401 is configured to send information related to selecting the type of random access procedure to the user equipment, so that the user equipment selects the type of the random access procedure according to the information, and uses the selected type of the random access procedure Perform random access;
  • the type of the random access process includes a 4-step random access process or a 2-step random access process.
  • the device 1400 may further include:
  • the first determining unit 1402 is used to determine the physical random access channel (PRACH) resource collision situation and/or 2-step random access and 4-step random access 2-step) The demodulation of the physical uplink data channel (PUSCH) for random access, and it is determined to send information related to the selection of the random access process type to the user equipment.
  • PRACH physical random access channel
  • PUSCH physical uplink data channel
  • a random access type selection mechanism is provided, which can be selected and used according to the actual situation. Therefore, it can improve the success rate of random access, shorten the data transmission delay, and improve the system performance.
  • the embodiment of the present invention provides a user equipment, and the user equipment includes the apparatus for selecting a random access type as described in Embodiment 4.
  • FIG. 15 is a schematic block diagram of the system configuration of user equipment according to Embodiment 6 of the present invention.
  • the user equipment 1500 may include a processor 1510 and a memory 1520; the memory 1520 is coupled to the processor 1510. It is worth noting that this figure is exemplary; other types of structures can also be used to supplement or replace this structure to achieve telecommunication functions or other functions.
  • the function of the device for selecting the random access type may be integrated into the processor 1510.
  • the processor 1510 may be configured to: select the type of random access process; and use the selected type of random access process to perform random access; wherein, the type of random access process includes 4 steps (4-step ) Random access process or 2-step (4-step) random access process.
  • the device for selecting the random access type can be configured separately from the processor 1510.
  • the device for selecting the random access type can be configured as a chip connected to the processor 1510, which is implemented through the control of the processor 1510. Select the function of the random access type of device.
  • the user equipment 1500 may further include: a communication module 1530, an input unit 1540, a display 1550, and a power supply 1560. It is worth noting that the user equipment 1500 does not necessarily include all the components shown in FIG. 15; in addition, the user equipment 1500 may also include components not shown in FIG. 15, and related technologies may be referred to.
  • the processor 1510 is sometimes called a controller or an operating control, and may include a microprocessor or other processor device and/or logic device.
  • the processor 1510 receives input and controls the operation of the various components of the user equipment 1500. operating.
  • the memory 1520 may be, for example, one or more of a cache, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable devices.
  • Various data can be stored, in addition to programs that execute related information.
  • the processor 1510 can execute the program stored in the memory 1520 to implement information storage or processing.
  • the functions of other components are similar to the existing ones, so I won't repeat them here.
  • the components of the user equipment 1500 may be implemented by dedicated hardware, firmware, software, or a combination thereof, without departing from the scope of the present invention.
  • a random access type selection mechanism is provided, which can be selected and used according to the actual situation. Therefore, it can improve the success rate of random access, shorten the data transmission delay, and improve the system performance.
  • the embodiment of the present invention provides a network device, and the network device includes the apparatus for selecting a random access type as described in Embodiment 5.
  • FIG. 16 is a schematic diagram of a structure of a network device according to Embodiment 7 of the present invention.
  • the network device 1600 may include: a processor 1610 and a memory 1620; the memory 1620 is coupled to the processor 1610.
  • the memory 1620 can store various data; in addition, it also stores an information processing program 1630, and executes the program 1630 under the control of the processor 1610 to receive various information sent by the user equipment and send various information to the user equipment .
  • the function of the device for selecting the random access type may be integrated into the processor 1610.
  • the processor 1610 may be configured to send information related to selecting the type of random access procedure to the user equipment, so that the user equipment selects the type of the random access procedure according to the information, and uses the selected random access procedure.
  • Type of random access wherein, the type of the random access process includes a 4-step random access process or a 2-step random access process.
  • the device for selecting the random access type can be configured separately from the processor 1610.
  • the device for selecting the random access type can be configured as a chip connected to the processor 1610, which is implemented through the control of the processor 1610. Select the function of the random access type of device.
  • the network device 1600 may further include: a transceiver 1640, an antenna 1650, etc.; wherein the functions of the above-mentioned components are similar to those of the prior art, and will not be repeated here. It is worth noting that the network device 1600 does not necessarily include all the components shown in FIG. 16; in addition, the network device 1600 may also include components not shown in FIG. 16, which can refer to the prior art.
  • a random access type selection mechanism is provided, which can be selected and used according to the actual situation. Therefore, it can improve the success rate of random access, shorten the data transmission delay, and improve the system performance.
  • the embodiment of the present invention provides a communication system including the user equipment described in Embodiment 6 and/or the network equipment described in Embodiment 7.
  • the structure of the communication system can refer to FIG. 4.
  • the communication system 100 includes a network device 101 and a user equipment 102.
  • the user equipment 102 is the same as the user equipment described in the sixth embodiment.
  • the network equipment recorded in 7 is the same, and the repeated content will not be repeated.
  • a random access type selection mechanism is provided, which can be selected and used according to the actual situation. Therefore, it can improve the success rate of random access, shorten the data transmission delay, and improve the system performance.
  • the above devices and methods of the present invention can be implemented by hardware, or by hardware combined with software.
  • the present invention relates to such a computer-readable program, when the program is executed by a logic component, the logic component can realize the above-mentioned device or constituent component, or the logic component can realize the above-mentioned various methods Or steps.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, etc.
  • the present invention also relates to storage media for storing the above programs, such as hard disks, magnetic disks, optical disks, DVDs, flash memory, and the like.
  • the method/device described in conjunction with the embodiments of the present invention may be directly embodied as hardware, a software module executed by a processor, or a combination of the two.
  • one or more of the functional block diagrams and/or one or more combinations of the functional block diagrams shown in FIG. 11 may correspond to each software module of the computer program flow or each hardware module.
  • These software modules can respectively correspond to the steps shown in FIG. 5.
  • These hardware modules can be implemented by curing these software modules by using a field programmable gate array (FPGA), for example.
  • FPGA field programmable gate array
  • the software module can be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM or any other form of storage medium known in the art.
  • a storage medium may be coupled to the processor, so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be a component of the processor.
  • the processor and the storage medium may be located in the ASIC.
  • the software module can be stored in the memory of the mobile terminal, or can be stored in a memory card that can be inserted into the mobile terminal.
  • the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.
  • One or more of the functional blocks and/or one or more combinations of the functional blocks described in FIG. 11 can be implemented as a general-purpose processor or a digital signal processor for performing the functions described in the present invention ( DSP), Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof.
  • DSP Digital Signal Process
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • One or more of the functional blocks and/or one or more combinations of the functional blocks described with respect to FIG. 11 can also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, or multiple microcomputers.
  • a device for selecting a random access type the device being applied to the user equipment side, the device comprising:
  • a first selection unit for selecting the type of random access procedure for selecting the type of random access procedure
  • the first access unit is used to perform random access using the selected random access process type
  • the type of the random access process includes a 4-step random access process or a 2-step random access process.
  • the first selection unit includes:
  • the second selection unit is used to independently select the type of random access procedure; or,
  • the third selection unit is used to select the type of the random access process according to the information related to the selection of the random access process type sent by the network device.
  • the fourth selection unit is configured to select the type of random access procedure according to the channel quality between the network equipment and the user equipment, or,
  • the fifth selection unit is used to select the type of the random access process according to the modulation and coding scheme (MCS) of the MsgA data of the 2-step random access process, the size of the MAC layer data of the MsgA, or the size of the physical resource occupied by the MsgA data.
  • MCS modulation and coding scheme
  • the 4-step (2-step) random access procedure is selected when the channel quality does not meet the first preset condition.
  • the first preset condition is at least one of the following conditions:
  • the path loss from the network device to the user equipment is less than a first threshold
  • the RSRP value of the reference signal sent by the network device is higher than the second threshold
  • the RSRQ value of the reference signal sent by the network device is higher than the third threshold
  • the reference signal includes a synchronization reference signal (SS-RS) or a channel state information reference signal (CSI-RS).
  • SS-RS synchronization reference signal
  • CSI-RS channel state information reference signal
  • the 4-step random access process is selected when the modulation and coding mode (MCS) of the MsgA data is greater than the fourth threshold,
  • the 2-step random access process is selected when the modulation and coding mode of the MsgA data is less than or equal to the fourth threshold.
  • the 4-step random access procedure is selected.
  • the 2-step random access process is selected when the data size of the MAC layer of the MsgA is less than or equal to the fifth threshold.
  • the 4-step random access process is selected when the number of physical resource blocks (PRB) occupied by the MsgA data is greater than the fifteenth threshold, and when the number of physical resource blocks (PRB) occupied by the MsgA data is less than or When it is equal to the fifteenth threshold, the 2-step random access process is selected.
  • the information related to the selection of the random access process type is sent through system broadcast information or random access response.
  • the information related to the selection of the random access process type indicates the type of the random access process in an explicit or implicit manner.
  • the type of random access process is selected when random access is initiated, or, after random access is initiated and the random access process is not completed, the type of random access process to continue subsequently is selected.
  • the initiation of random access is triggered by MAC layer uplink service data or CCCH data sent by RRC layer.
  • the subsequent 4-step random access process is selected.
  • the random access response includes an instruction to send 4-step random Random access response to access Msg3 or 2-step random access response MsgB message;
  • the number of times of sending 2-step random access preamble reaches the sixth threshold
  • the power of sending the 2-step random access preamble reaches the seventh threshold
  • the power of the PUSCH data for sending the MsgA message reaches the eighth threshold.
  • the backoff indication information or backoff 4-step random access indication information sent by the network equipment in the random access response MAC layer PDU, or the backoff 4-step random access indication information sent by the network equipment in the system broadcast information Instruction information are provided.
  • MsgA message containing the preamble and data After sending the MsgA message containing the preamble and data to the network device, it receives the instruction from the network device to send a 4-step random access response to Msg3, and choose to send a 4-step random access response. Msg3 of access.
  • the subsequent 4-step random access process is selected.
  • the random access response from the network device is not received;
  • a 2-step random access response MsgB message from the network device is received, but the contention resolution information contained in the MsgB message is different from the contention resolution information contained in the MsgB message.
  • the data of the MsgA message sent by the network device does not match;
  • the number of times of sending 2-step random access preamble reaches the ninth threshold
  • the power of transmitting the 2-step random access preamble reaches the tenth threshold
  • the power of the PUSCH data for sending the MsgA message reaches the eleventh threshold.
  • the 4-step random access contention resolution message is not received from the network device;
  • the number of sending 4-step random access preambles reaches the twelfth threshold
  • the power of sending 4-step random access preamble reaches the thirteenth threshold
  • the power for sending Msg3 messages reaches the fourteenth threshold.
  • a device for selecting a random access type the device being applied to a network equipment side, the device comprising:
  • the first sending unit is configured to send information related to the selection of the type of random access process to the user equipment, so that the user equipment selects the type of the random access process according to the information, and uses the selected random access process Type for random access;
  • the type of the random access process includes a 4-step random access process or a 2-step random access process.
  • the first determining unit which is used to determine the physical random access channel (PRACH) resource collision situation and/or 2-step random access and 4-step random access -step)
  • the demodulation situation of the physical uplink data channel (PUSCH) for random access determining to send information related to the selection of the random access process type to the user equipment.
  • PRACH physical random access channel
  • PUSCH physical uplink data channel
  • the information related to the selection of the random access process type is sent through system broadcast information or random access response.
  • the information related to the selection of the random access process type indicates the type of the random access process in an explicit or implicit manner.
  • the user equipment After the user equipment initiates random access, and the ongoing 2-step random access process is not completed, the user equipment is sent information related to the selection of the random access process type so that all The user equipment chooses to perform a 4-step random access process subsequently.
  • the user equipment After receiving the preamble of the random access MsgA message sent by the user equipment, it sends information related to the selection of a 4-step random access process to the user equipment, so that the user equipment selects subsequent Send the preamble of 4-step random access.
  • the device according to Supplement 28, wherein the information related to the selection of a 4-step random access procedure includes:
  • Backoff indication information or backoff 4-step random access indication information sent in the random access response MAC layer PDU, or backoff 4-step random access indication information sent by the network device in system broadcast information are also possible.
  • the device according to appendix 30, wherein the information related to selecting a 4-step random access process includes: instructing to send a 4-step random access Msg3 random access process Into the response.
  • a user equipment comprising the apparatus according to any one of Supplementary Notes 1-21.
  • a network device comprising the device according to any one of Supplements 22-31.
  • a communication system comprising the user equipment according to Supplement 32 and/or the network equipment according to Supplement 33.
  • a method for selecting a random access type the method being applied to the user equipment side, the method including:
  • the type of the random access process includes a 4-step random access process or a 2-step random access process.
  • the type of random access process is selected according to the information related to the selection of the random access process type sent by the network device.
  • the MAC layer data size of the MsgA or the physical resource size occupied by the MsgA data, the type of the random access process is selected.
  • the 4-step (2-step) random access procedure is selected when the channel quality does not meet the first preset condition.
  • the first preset condition is at least one of the following conditions:
  • the path loss from the network device to the user equipment is less than a first threshold
  • the RSRP value of the reference signal sent by the network device is higher than the second threshold
  • the RSRQ value of the reference signal sent by the network device is higher than the third threshold
  • the reference signal includes a synchronization reference signal (SS-RS) or a channel state information reference signal (CSI-RS).
  • SS-RS synchronization reference signal
  • CSI-RS channel state information reference signal
  • the 4-step random access process is selected when the modulation and coding mode (MCS) of the MsgA data is greater than the fourth threshold,
  • the 2-step random access process is selected when the modulation and coding mode of the MsgA data is less than or equal to the fourth threshold.
  • the 4-step random access procedure is selected.
  • the 2-step random access process is selected when the data size of the MAC layer of the MsgA is less than or equal to the fifth threshold.
  • the 4-step random access process is selected when the number of physical resource blocks (PRB) occupied by the MsgA data is greater than the fifteenth threshold, and when the number of physical resource blocks (PRB) occupied by the MsgA data is less than or When it is equal to the fifteenth threshold, the 2-step random access process is selected.
  • the information related to the selection of the random access process type is sent through system broadcast information or random access response.
  • the information related to the selection of the random access process type indicates the type of the random access process in an explicit or implicit manner.
  • the type of random access process is selected when random access is initiated, or, after random access is initiated and the random access process is not completed, the type of random access process to continue subsequently is selected.
  • the initiation of random access is triggered by MAC layer uplink service data or CCCH data sent by RRC layer.
  • the subsequent 4-step random access process is selected.
  • the random access response includes an instruction to send 4-step random Random access response to access Msg3 or 2-step random access response MsgB message;
  • the number of times of sending 2-step random access preamble reaches the sixth threshold
  • the power of sending the 2-step random access preamble reaches the seventh threshold
  • the power of the PUSCH data for sending the MsgA message reaches the eighth threshold.
  • the backoff indication information or backoff 4-step random access indication information sent by the network equipment in the random access response MAC layer PDU, or the backoff 4-step random access indication information sent by the network equipment in the system broadcast information Instruction information are provided.
  • MsgA message containing the preamble and data After sending the MsgA message containing the preamble and data to the network device, it receives the instruction from the network device to send a 4-step random access response to Msg3, and choose to send a 4-step random access response. Msg3 of access.
  • the subsequent 4-step random access process is selected.
  • the random access response from the network device is not received;
  • a 2-step random access response MsgB message from the network device is received, but the contention resolution information contained in the MsgB message is different from the contention resolution information contained in the MsgB message.
  • the data of the MsgA message sent by the network device does not match;
  • the number of times of sending 2-step random access preamble reaches the ninth threshold
  • the power of transmitting the 2-step random access preamble reaches the tenth threshold
  • the power of the PUSCH data for sending the MsgA message reaches the eleventh threshold.
  • the 4-step random access contention resolution message is not received from the network device;
  • a 4-step random access contention resolution message is received from the network device, but the information contained in the contention resolution message is the same as The Msg3 message sent to the network device does not match;
  • the number of sending 4-step random access preambles reaches the twelfth threshold
  • the power of sending 4-step random access preamble reaches the thirteenth threshold
  • the power for sending Msg3 messages reaches the fourteenth threshold.
  • a method for selecting a random access type the method being applied to a network device side, the method including:
  • the type of the random access process includes a 4-step random access process or a 2-step random access process.
  • the demodulation situation of the uplink data channel determines to send information related to the selection of the random access process type to the user equipment.
  • the information related to the selection of the random access process type is sent through system broadcast information or random access response.
  • the information related to the selection of the random access process type indicates the type of the random access process in an explicit or implicit manner.
  • the user equipment After the user equipment initiates random access, and the ongoing 2-step random access process is not completed, the user equipment is sent information related to the selection of the random access process type so that all The user equipment chooses to perform a 4-step random access process subsequently.
  • the user equipment After receiving the preamble of the random access MsgA message sent by the user equipment, it sends information related to the selection of a 4-step random access process to the user equipment, so that the user equipment selects subsequent Send the preamble of 4-step random access.
  • Backoff indication information or backoff 4-step random access indication information sent in the random access response MAC layer PDU, or backoff 4-step random access indication information sent by the network device in system broadcast information are also possible.

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Abstract

一种选择随机接入类型的方法及装置,通过选择随机接入过程的类型并使用选择的随机接入过程的类型进行随机接入,提供了一种随机接入类型的选择机制,能够根据实际情况而选择并使用合适的随机接入过程的类型,因此能够提高随机接入的成功率,缩短数据传输时延,提高系统性能。

Description

选择随机接入类型的方法及装置 技术领域
本发明涉及通信领域,特别涉及一种选择随机接入类型的方法及装置。
背景技术
在ITU(国际电信联盟,International Telecommunication Union)定义的5G NR KPI(关键性能指标,Key Performance Indication)指标中,mMTC(massive machine-type communications)海量机器通信场景的连接密度需要达到100万终端/平方公里,超高可靠低时延uRLLC(Ultra Reliable & Low Latency Communication)的超低时延业务的时延需要低于1ms。
mMTC场景需要一种低成本、低信令开销、低时延、低功耗的通信系统,因为海量的机器通信终端设备产生的大量上行小数据包突发都需要通过随机接入发送给网络,而如果基于现有的4步(4-step)随机接入和正交多址接入技术,则空口信令开销和传输时延较大;同样,uRLLC场景的业务主要是周期性或事件触发的小数据包,大概率采用随机接入发送上行数据,现有的4步随机接入无法满足低信令开销和低时延要求;针对车对车V2V(Vehicle-to-Vehicle)和移动宽带增强eMBB(Enhance Mobile Broadband)应用场景下也可能有小包业务,在现有的4步随机接入方式下的传输也是低效的。另外,在非授权频谱中,由于信道接入是基于WiFi的载波监听技术的先听后说(Listen Before Talk,LBT)机制,在网络设备或用户设备(User Equipment,UE)监听到信道空闲时,即LBT成功时才发送信号,采用现有的4步随机接入将大大影响接入成功率和接入时延。
图1是现有的4步基于竞争随机接入(Contention Based Random Access,CBRA)的流程的一示意图。在4步CBRA中,首先,UE选择CBRA前导码(preamble),在系统预配置的基于竞争的随机接入机会(Random access Occasion,RO)中向作为网络设备的gNB发送前导码,即Msg1;第2步,gNB收到该前导码后,发送随机接入响应(Random Access Response,RAR),即Msg2,授权发送该前导码的UE一个专用上行PUSCH(Physical Uplink Shared CHannel)资源并分配临时CRNTI(Cell Radio Network Temmporary Identify)并指示PUSCH的上行提前量;第3步,UE在该PUSCH 资源上发送携带信令或数据的Msg3;第4步,gNB向UE发送针对Msg3的竞争解决信令Msg4。
应该注意,上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、完整的说明,并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
发明人发现,在某些场景下,如果持续使用一种随机接入类型,可能导致持续的接入失败而影响系统性能。因此,缺少一种可以根据实际情况进行随机接入类型的选择机制。
为了解决上述问题的至少一个,本发明实施例提供了一种选择随机接入类型的方法及装置。
根据本发明实施例的第一方面,提供一种选择随机接入类型的装置,所述装置应用于用户设备侧,所述装置包括:第一选择单元,其用于选择随机接入过程的类型;以及第一接入单元,其用于使用选择的随机接入过程的类型,进行随机接入;其中,所述随机接入过程的类型包括4步(4-step)随机接入过程或2步(4-step)随机接入过程。
根据本发明实施例的第二方面,提供一种选择随机接入类型的装置,所述装置应用于网络设备侧,所述装置包括:第一发送单元,其用于向用户设备发送与选择随机接入过程的类型相关的信息,使得所述用户设备根据所述信息选择随机接入过程的类型,以及使用选择的随机接入过程的类型进行随机接入;其中,所述随机接入过程的类型包括4步(4-step)随机接入过程或2步(4-step)随机接入过程。
根据本发明实施例的第三方面,提供一种用户设备,所述用户设备包括根据本发明实施例的第一方面所述的装置。
根据本发明实施例的第四方面,提供一种网络设备,所述网络设备包括根据本发明实施例的第二方面所述的装置。
根据本发明实施例的第五方面,提供一种通信系统,所述通信系统包括根据本发明实施例的第三方面所述的网络设备和/或根据根据本发明实施例的第四方面所述的网络设备。
根据本发明实施例的第六方面,提供一种选择随机接入类型的方法,所述方法应用于用户设备侧,所述方法包括:选择随机接入过程的类型;以及使用选择的随机接入过程的类型,进行随机接入;其中,所述随机接入过程的类型包括4步(4-step)随机接入过程或2步(4-step)随机接入过程。
根据本发明实施例的第七方面,提供一种选择随机接入类型的方法,所述方法应用于网络设备侧,所述方法包括:向用户设备发送与选择随机接入过程的类型相关的信息,使得所述用户设备根据所述信息选择随机接入过程的类型,以及使用选择的随机接入过程的类型进行随机接入;其中,所述随机接入过程的类型包括4步(4-step)随机接入过程或2步(4-step)随机接入过程。
根据本发明实施例的第八方面,提供了一种计算机可读程序,其中当在选择随机接入类型的装置或用户设备中执行所述程序时,所述程序使得所述选择随机接入类型的装置或用户设备执行本发明实施例的第六方面所述的选择随机接入类型的方法。
根据本发明实施例的第九方面,提供了一种存储有计算机可读程序的存储介质,其中所述计算机可读程序使得选择随机接入类型的装置或用户设备执行本发明实施例的第六方面所述的选择随机接入类型的接收方法。
根据本发明实施例的第十方面,提供了一种计算机可读程序,其中当在选择随机接入类型的装置或网络设备中执行所述程序时,所述程序使得所述选择随机接入类型的装置或网络设备执行本发明实施例的第七方面所述的选择随机接入类型的方法。
根据本发明实施例的第十一方面,提供了一种存储有计算机可读程序的存储介质,其中所述计算机可读程序使得选择随机接入类型的装置或网络设备执行本发明实施例的第七方面所述的选择随机接入类型的方法。
本发明实施例的有益效果在于:通过选择随机接入过程的类型并使用选择的随机接入过程的类型进行随机接入,提供了一种随机接入类型的选择机制,能够根据实际情况而选择并使用合适的随机接入过程的类型,因此能够提高随机接入的成功率,缩短数据传输时延,提高系统性能。
参照后文的说明和附图,详细公开了本发明的特定实施方式,指明了本发明的原理可以被采用的方式。应该理解,本发明的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内,本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多 个其它实施方式中使用,与其它实施方式中的特征相组合,或替代其它实施方式中的特征。
应该强调,术语“包括/包含/具有”在本文使用时指特征、整件、步骤或组件的存在,但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
在本发明实施例的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外,在附图中,类似的标号表示几个附图中对应的部件,并可用于指示多于一种实施方式中使用的对应部件。
所包括的附图用来提供对本发明实施例的进一步的理解,其构成了说明书的一部分,用于例示本发明的实施方式,并与文字描述一起来阐释本发明的原理。显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其它的附图。在附图中:
图1是现有的4步基于竞争随机接入(Contention Based Random Access,CBRA)的流程的一示意图;
图2是2步(2-step)随机接入的流程的一示意图;
图3是发起随机接入且未完成2步(2-step)随机接入过程时转为4步随机接入的流程的一示意图;
图4是本发明实施例的通信系统的一示意图;
图5是本发明实施例1的选择随机接入类型的方法的一示意图;
图6是本发明实施例1的随机接入过程的一个示例的示意图;
图7是本发明实施例1的随机接入过程的另一个示例的示意图;
图8是本发明实施例2的选择随机接入类型的方法的一示意图;
图9是本发明实施例3的选择随机接入类型的方法的一示意图;
图10是本发明实施例3的选择随机接入类型的方法的另一示意图;
图11是本发明实施例4的选择随机接入类型的装置的一示意图;
图12是本发明实施例4的第一选择单元的一示意图;
图13是本发明实施例4的第二选择单元的一示意图;
图14是本发明实施例5的选择随机接入类型的装置的一示意图;
图15是本发明实施例6的用户设备的系统构成的一示意框图;
图16是本发明实施例7的网络设备的一构成示意图。
具体实施方式
参照附图,通过下面的说明书,本发明的前述以及其它特征将变得明显。在说明书和附图中,具体公开了本发明的特定实施方式,其表明了其中可以采用本发明的原则的部分实施方式,应了解的是,本发明不限于所描述的实施方式,相反,本发明包括落入所附权利要求的范围内的全部修改、变型以及等同物。
在本发明实施例中,术语“第一”、“第二”等用于对不同元素从称谓上进行区分,但并不表示这些元素的空间排列或时间顺序等,这些元素不应被这些术语所限制。术语“和/或”包括相关联列出的术语的一种或多个中的任何一个和所有组合。术语“包含”、“包括”、“具有”等是指所陈述的特征、元素、元件或组件的存在,但并不排除存在或添加一个或多个其他特征、元素、元件或组件。
在本发明实施例中,单数形式“一”、“该”等包括复数形式,应广义地理解为“一种”或“一类”而并不是限定为“一个”的含义;此外术语“所述”应理解为既包括单数形式也包括复数形式,除非上下文另外明确指出。此外术语“根据”应理解为“至少部分根据……”,术语“基于”应理解为“至少部分基于……”,除非上下文另外明确指出。
在本发明实施例中,术语“通信网络”或“无线通信网络”可以指符合如下任意通信标准的网络,例如长期演进(LTE,Long Term Evolution)、增强的长期演进(LTE-A,LTE-Advanced)、宽带码分多址接入(WCDMA,Wideband Code Division Multiple Access)、高速报文接入(HSPA,High-Speed Packet Access)等等。
并且,通信系统中设备之间的通信可以根据任意阶段的通信协议进行,例如可以包括但不限于如下通信协议:1G(generation)、2G、2.5G、2.75G、3G、4G、4.5G以及未来的5G、新无线(NR,New Radio)等等,和/或其他目前已知或未来将被开发的通信协议。
在本发明实施例中,术语“网络设备”例如是指通信系统中将用户设备接入通信网络并为该用户设备提供服务的设备。网络设备可以包括但不限于如下设备:基站(BS,Base Station)、接入点(AP、Access Point)、发送接收点(TRP,Transmission  Reception Point)、广播发射机、移动管理实体(MME、Mobile Management Entity)、网关、服务器、无线网络控制器(RNC,Radio Network Controller)、基站控制器(BSC,Base Station Controller)等等。
其中,基站可以包括但不限于:节点B(NodeB或NB)、演进节点B(eNodeB或eNB)以及5G基站(gNB),等等,此外还可包括远端无线头(RRH,Remote Radio Head)、远端无线单元(RRU,Remote Radio Unit)、中继(relay)或者低功率节点(例如femto、pico等等)。并且术语“基站”可以包括它们的一些或所有功能,每个基站可以对特定的地理区域提供通信覆盖。术语“小区”可以指的是基站和/或其覆盖区域,这取决于使用该术语的上下文。
在本发明实施例中,术语“用户设备”(UE,User Equipment)例如是指通过网络设备接入通信网络并接收网络服务的设备,也可以称为“终端设备”(TE,Terminal Equipment)。终端设备可以是固定的或移动的,并且也可以称为移动台(MS,Mobile Station)、终端、用户台(SS,Subscriber Station)、接入终端(AT,Access Terminal)、站,等等。
其中,终端设备可以包括但不限于如下设备:蜂窝电话(Cellular Phone)、个人数字助理(PDA,Personal Digital Assistant)、无线调制解调器、无线通信设备、手持设备、机器型通信设备、膝上型计算机、无绳电话、智能手机、智能手表、数字相机,等等。
再例如,在物联网(IoT,Internet of Things)等场景下,终端设备还可以是进行监控或测量的机器或装置,例如可以包括但不限于:机器类通信(MTC,Machine Type Communication)终端、车载通信终端、设备到设备(D2D,Device to Device)终端、机器到机器(M2M,Machine to Machine)终端,等等。
在本发明实施例中,2步(2-step)随机接入和非正交多址接入技术是针对降低随机接入信令开销和时延的通用解决方案,可以在随机接入过程中免去上行调度过程,特别是针对小数据包和非授权频段业务有较明显的效率提升,能满足未来海量大连接mMTC应用场景的低成本、低功耗、海量小包的需求,也满足eMBB、uRLLC、V2V等应用场景下频繁的小数据包随机突发业务的低时延、低功耗要求,同时普遍适用于非授权频谱和授权频谱的随机接入。
图2是2步(2-step)随机接入的流程的一示意图。在2步CBRA中,第1步, UE发送MsgA,MsgA包含CBRA前导码(preamble)和数据部分,UE在竞争的RO中发送MsgA的前导码并在竞争的PUSCH资源中发送MsgA的信令或业务数据;第2步,gNB收到MsgA后发送MsgB,向UE发送随机接入响应和竞争解决消息。可见,UE可以在随机接入过程中实现免上行调度发送,一步上传信令或业务包,减少了随机接入信令和时延。
gNB通过同样在MsgA数据PUSCH资源上发送的解调参考信号(DMRS,Demodulation Reference Signal)解调MsgA数据,DMRS序列与UE发送的MsgA的前导码索引(Index)相关,gNB根据在RO资源中解调出的前导码得到该preamble前导码索引对应的DMRS。因此,如果多个UE在2-step CBRA时选择不同的前导码索引并在相同的PUSCH上传输MsgA数据,gNB可以根据前导码索引对应的DMRS解调出MsgA数据。
在本发明实施例中,2步随机接入中多个UE可共享发送MsgA数据的资源,UE根据随机选择的前导码和RO确定发送MsgA数据的PUSCH资源,如果信道情况较差则在基站侧成功解调PUSCH的概率降低,2步随机接入失败,此时采用2步随机接入的UE传输时延和传输效率将比采用4步随机接入的UE差。另外,网络中多个UE使用相同RO发送MsgA的前导码,或多个UE使用相同的MsgA PUSCH资源产生冲突时,会出现gNB无法成功解调MsgA的前导码或MsgA数据的情况,此时2步随机接入失败。如果网络冲突情况持续,UE采用2步随机接入方式接入网络可能会再次失败,增加传输时延,可以考虑让UE回退到4-step随机接入。
图3是发起随机接入且未完成2步(2-step)随机接入过程时转为4步随机接入的流程的一示意图。如图3所示,当gNB成功解调MsgA的前导码,但解调该MsgA的数据失败时,gNB会向UE发送4-step随机接入的随机接入响应,即Msg2,使UE重新发送MsgA的数据部分,即Msg3。
以下通过示例对本发明实施例的场景进行说明,但本发明不限于此。
图4是本发明实施例的通信系统的一示意图,其示意性说明了以用户设备和网络设备为例的情况,如图4所示,通信系统100可以包括:网络设备101和用户设备102。为简单起见,图4仅以一个用户设备为例进行说明。网络设备101例如为NR的网络设备gNB。
在本发明实施例中,网络设备101和用户设备102之间可以进行现有的业务或者 未来可实施的业务。例如,这些业务包括但不限于:增强的移动宽带(eMBB,enhanced Mobile Broadband)、大规模机器类型通信(mMTC,massive Machine Type Communication)和高可靠低时延通信(URLLC,Ultra-Reliable and Low-Latency Communication),等等。
其中,用户设备102可以向网络设备101发送数据,例如,发起随机接入过程。
下面结合附图对本发明实施例的各种实施方式进行说明。这些实施方式只是示例性的,不是对本发明的限制。
实施例1
本发明实施例提供了一种选择随机接入类型的方法,该方法应用于用户设备侧。
图5是本发明实施例1的选择随机接入类型的方法的一示意图,如图5所示,该方法包括:
步骤501:选择随机接入过程的类型;以及
步骤502:使用选择的随机接入过程的类型,进行随机接入。
其中,随机接入过程的类型包括4步(4-step)随机接入过程或2步(2-step)随机接入过程。
这样,通过选择随机接入过程的类型并使用选择的随机接入过程的类型进行随机接入,提供了一种随机接入类型的选择机制,能够根据实际情况而选择并使用合适的随机接入过程的类型,因此能够提高随机接入的成功率,缩短数据传输时延,提高系统性能。
在本实施例中,4步(4-step)随机接入过程可以是现有的4步(4-step)随机接入过程,例如,参见图1所示的流程;也可以是发起随机接入且未完成2步(2-step)随机接入过程时转为4步随机接入的情况,例如,参见图3所示的流程。
在本实施两种,2步(2-step)随机接入过程例如可以参见图2所示的流程。
另外,本发明实施例中的随机接入过程的类型也可以包括4步(4-step)随机接入过程和2步(2-step)随机接入过程以外的其他随机接入过程。
在步骤501中,用户设备选择随机接入过程的类型,例如,用户设备自主选择随机接入过程的类型;或者,根据网络设备发送的与选择随机接入过程类型相关的信息,选择随机接入过程的类型。
以下,针对用户设备自主选择以及根据网络设备发送的与选择随机接入过程类型 相关的信息进行选择的情况,分别进行说明。
情况1、用户设备自主选择随机接入过程的类型:
在本实施例中,用户设备可以根据网络设备和该用户设备之间的信道质量选择随机接入过程的类型,或者,也可以根据MsgA数据的调制和编码方式(Modulation and Coding Scheme,MCS)、MsgA的MAC层的数据大小或MsgA数据占用的物理资源大小,选择随机接入过程的类型。
对于根据网络设备和该用户设备之间的信道质量选择随机接入过程的类型的情况,例如,当该信道质量满足第一预设条件时选择该2步(2-step)随机接入过程,当该信道质量不满足该第一预设条件时选择该4步(2-step)随机接入过程。
该第一预设条件可以是以下条件中的至少一个:该网络设备到该用户设备的路径损耗小于第一阈值;该网络设备发送的参考信号的RSRP(Reference Signal Receiving Power,参考信号接收功率)值高于第二阈值;以及该网络设备发送的参考信号的RSRQ(Reference Signal Receiving Quality,参考信号接收质量)值高于第三阈值;其中,该参考信号包括同步参考信号(Synchronization Signals Reference Signal,SS-RS)或信道状态信息参考信号(CSI Reference Signal,CSI-RS)。
在本实施例中,第一阈值,第二阈值以及第三阈值的具体数值可以根据实际情况而确定。
例如,用于判断该路径损耗的第一阈值是UE允许的最大发送功率与MsgA PUSCH的目标接收功率的差值,例如,可以根据公式PCMAX–MsgAPUSCHReceivedTargetPower计算该第一阈值,其中,PCMAX是UE在发起随机接入的小区中的允许最大发送功率,MsgAPUSCHReceivedTargetPower是MsgA PUSCH的目标接收功率。
例如,该目标接收功率可以根据MsgA preamble的目标接收功率和MsgA PUSCH相比于MsgA Preamble的目标接收功率偏差计算出来,即通过以下的公式(1)计算:
MsgAPUSCHReceivedTargetPower=MsgApreambleReceivedTargetPower+MsgAPUSCHDeltaPreamble (1)
其中,MsgApreambleReceivedTargetPower表示MsgA preamble的目标接收功率,MsgAPUSCHDeltaPreamble表示MsgA PUSCH相比于MsgA Preamble的目标接收功率偏差。
在本实施例中,计算该第一阈值时而需要的上述各个参数,例如,PCMAX,MsgApreambleReceivedTargetPower,MsgAPUSCHDeltaPreamble等参数中的至少一个,可以由网络设备通过系统信息发送给UE。
另外,上述第一阈值、第二阈值以及第三阈值可以是网络设备配置给UE的,也可以是UE根据网络设备发送的参数计算得到的。
对于根据MsgA数据的调制和编码方式(MCS)选择随机接入过程的类型的情况,例如,当上行数据的调制和编码方式(MCS)大于第四阈值时选择该4步(4-step)随机接入过程,当上行数据的调制和编码方式小于或等于该第四阈值时选择该2步(2-step)随机接入过程。
在本实施例中,第四阈值可以根据实际情况而确定。
例如,对于不同的MsgA PUSCH资源,可设置有不同的第四阈值,即第四阈值可以与MsgA PUSCH资源相对应。
在本实施例中,该上行数据例如是PUSCH,例如,MsgA数据需要使用的MCS可以根据MsgA的MAC层数据大小来确定,UE可以根据针对该PUSCH资源设置的MCS级别与MAC层数据大小的映射关系来确定MsgA PUSCH数据需要使用的MCS。第四阈值可以根据网络设备和UE间的信道质量确定,如果需要使用的MCS大于该PUSCH资源的第四阈值则不选择2步随机接入过程。
例如,对于公共控制信道的服务数据单元(CCCH SDU)触发的随机接入,MsgA的MAC层数据的大小为CCCH SDU加上MAC subheader;对于上行数据触发的随机接入,MsgA的MAC层数据的大小为上行数据加上CRNTI MAC CE大小再加上MAC subheader。
又例如,MsgA数据需要使用的MCS可以根据网络设备和UE间的信道质量确定,例如,根据网络设备发送的参考信号SS-RS或CSI-RS的RSRP或RSRQ的值确定。
对于根据MsgA的MAC层的数据大小选择随机接入过程的类型的情况,例如,当需要传输的MsgA的MAC层的数据大小大于第五阈值时选择该4步(4-step)随机接入过程,当需要传输的MAC层的数据大小小于或等于该第五阈值时选择该2步(2-step)随机接入过程。
在本实施例中,第五阈值可以根据实际情况而确定。
例如,对于不同的MsgA PUSCH资源,可设置有不同的第五阈值,即第五阈值可以与MsgA PUSCH资源相对应。
例如,对于公共控制信道的服务数据单元(CCCH SDU)触发的随机接入,MAC层数据的大小为CCCH SDU加上MAC subheader;对于上行数据触发的随机接入,MAC层数据的大小为上行数据加上CRNTI MAC CE大小再加上MAC subheader。
对于根据MsgA数据占用的物理资源大小选择随机接入过程的类型的情况,例如,当MsgA数据需要占用的物理资源块(PRB)个数大于第十五阈值时选择该4步(4-step)随机接入过程,当该MsgA数据需要占用的物理资源块个数少于或等于该第十五阈值时选择该2步(2-step)随机接入过程。
该第十五阈值例如是PUSCH资源的PRB个数。
对于不同的MsgA PUSCH资源,可有不同的PRB个数,即PUSCH资源的大小可以与MsgA PUSCH资源相对应。
在本实施例中,MsgA数据需要占用物理层资源块个数可以根据MsgA的MAC层数据大小和需要使用的MCS来确定。UE可以根据网络设备和UE间的信道质量确定需要使用的MCS,然后根据需要使用的MCS和MsgA的MAC层数据大小确定MsgA数据需要占用的PRB个数。如果MsgA数据需要占用的PRB数大于该PUSCH资源的PRB个数时则不选择2步随机接入过程。
在本实施例中,对于公共控制信道的服务数据单元(CCCH SDU)触发的随机接入,MsgA的MAC层数据的大小为CCCH SDU加上MAC subheader;对于上行数据触发的随机接入,MsgA的MAC层数据的大小为上行数据加上CRNTI MAC CE大小再加上MAC subheader。
情况2、用户设备根据网络设备发送的与选择随机接入过程类型相关的信息,选择随机接入过程的类型:
在本实施例中,该与选择随机接入过程类型相关的信息可以通过系统广播信息或随机接入响应发送。
其中,该随机接入响应可以包括指示发送4步(4-step)随机接入Msg3的随机接入响应(即Msg2)或2-step随机接入响应MsgB消息。
在本实施例中,该与选择随机接入过程类型相关的信息可以通过显式或隐式的方式指示随机接入过程的类型。
例如,该与选择随机接入过程类型相关的信息中包含UE选择2步随机接入的概率值,在UE发起随机接入时或在随机接入进行中,UE侧产生一个随机数,当该随机数小于该概率值时,UE才能选择2步随机接入。
又例如,该与选择随机接入过程类型相关的信息可以是,该网络设备在随机接入响应MAC层PDU中发送的退避指示信息或回退4-step随机接入指示信息,或者,该网络设备在系统广播信息中发送的回退4-step随机接入指示信息。例如,UE在发起随机接入之后且正在进行的2步(2-step)随机接入过程未完成时,向网络设备发送2-step随机接入的MsgA的前导码和数据后收到上述信息中的至少一种信息时,选择后续发送该4步(4-step)随机接入的前导码。
以上对UE如何选择随机接入过程的类型进行说明。以下,对UE在什么时机下选择随机接入过程的类型进行说明。
在本实施例中,UE可以在发起随机接入时选择随机接入过程的类型,或者,在发起随机接入之后且随机接入过程未完成时,选择后续继续进行的随机接入过程的类型。
在本实施例中,该发起随机接入由MAC层上行业务数据或RRC层发送的CCCH数据触发。
例如,空闲状态下UE的RRC层发送CCCH SDU到MAC层时触发初始随机接入过程,或者,连接状态下UE有上行数据发送时MAC层触发连接态的随机接入过程。
在本实施例中,UE也可以在发起随机接入之后且随机接入过程未完成时,选择后续继续进行的随机接入过程的类型,例如,在发起随机接入之后,且正在进行的2步(2-step)随机接入过程未完成时,选择后续进行4步(4-step)随机接入过程,例如,选择选择后续发送4步(4-step)随机接入的前导码(Msg1)或发送4步(4-step)随机接入的Msg3。以下进行示例性的说明。
例如,在发起随机接入之后且正在进行的2步(2-step)随机接入过程未完成时,在以下的至少一种情况下,选择后续发送该4步(4-step)随机接入的前导码:
向网络设备发送2-step随机接入的Msg A的前导码和数据后未收到来自该网络设备的随机接入响应,该随机接入响应包括指示发送4步(4-step)随机接入Msg3的随机接入响应或2-step随机接入响应MsgB消息;
向网络设备发送2-step随机接入的MsgA的前导码和数据的后收到来自该网络设备的2步(2-step)随机接入响应MsgB消息,但该MsgB消息中包含的竞争解决信息与向该网络设备发送的MsgA消息的PUSCH数据不匹配;
向网络设备发送2-step随机接入的MsgA的前导码和数据后收到该网络设备发送的与选择4步(4-step)随机接入过程相关的信息;
发送2步(2-step)随机接入前导码的次数达到第六阈值;
发送2步(2-step)随机接入前导码的功率达到第七阈值;以及
发送MsgA消息的PUSCH数据的功率达到第八阈值。
在本实施例中,第六阈值、第七阈值以及第八阈值的数值可以根据实际情况而确定。
在本实施例中,该网络设备发送的与选择4步(4-step)随机接入过程相关的信息可以包括:该网络设备在随机接入响应MAC层PDU中发送的退避指示信息或回退4-step随机接入指示信息,或者,该网络设备在系统广播信息中发送的回退4-step随机接入指示信息。
在本实施例中,以上各种情况可以两种或多种进行组合,例如,UE向网络设备发送2-step随机接入的Msg A的前导码和数据后未收到来自该网络设备的随机接入响应,该随机接入响应包括指示发送4步(4-step)随机接入Msg3的随机接入响应或2-step随机接入响应MsgB消息,或者,UE向网络设备发送2-step随机接入的MsgA的前导码和数据的后收到来自该网络设备的2步(2-step)随机接入响应MsgB消息,但该MsgB消息中包含的竞争解决信息与向该网络设备发送的MsgA消息的PUSCH数据不匹配,并且UE收到网络设备发送的与选择随机接入过程类型相关的信息,例如,收到针对发送MsgA preamble的RO的随机接入响应MAC PDU中包含的退避指示subPDU(BI subPDU)。在该情况下,UE选择选择4-step随机接入PRACH资源发送前导码并等待接收4-step随机接入的Msg2。
进一步的,UE在收到随机接入响应MAC PDU中包含的退避指示时,将当前的退避参数(PREAMBLE_BACKOFF)设置为收到的退避指示subPDU中的BI值,在0和PREAMBLE_BACKOFF之间随机产生一个均匀分布的随机时间,在该随机接入时间后在4-step随机接入RO中发送4-step前导码。
在本实施例中,对于在发起随机接入之后且正在进行的2步(2-step)随机接入 过程未完成时,选择后续发送4步(4-step)随机接入的Msg3的情况,例如是,向网络设备发送包含前导码和数据的MsgA消息后,收到来自网络设备的指示发送4步(4-step)随机接入Msg3的随机接入响应,选择后续发送4步(4-step)随机接入的Msg3。例如,发送的该4步随机接入的Msg3包含发送的该MsgA消息中的该数据。
图6是本发明实施例1的随机接入过程的一个示例的示意图。如图6所示,两个UE同时在一个PRACH RO上发送MsgA的前导码,即preamble a/b,并在该PRACH对应的PUSCH上发送MsgA数据。网络设备检测到该RO上的碰撞,并成功检测到UE a发送的preamble a,未检测到UE b发送的preamble b,同时,网络设备未能成功解码UE a发送的MsgA数据。该网络设备在随机接入响应MAC PDU中发送针对UE a的4-step随机接入响应,即Msg2;并且,该网络设备在该随机响应MAC PDU中包含一个退避指示。这样,UE a收到了4-step随机接入响应,重新发送MsgA数据,即Msg3;而UE b由于即没有收到4-step随机接入响应(Msg2)也没有收到MsgB,并且收到了退避指示,从而发送4-step随机接入前导码,即Msg1。
图7是本发明实施例1的随机接入过程的另一个示例的示意图。如图7所示,两个UE同时在一个PRACH RO上发送MsgA的前导码,即preamble a/b,并在该PRACH和preamble对应的PUSCH上发送MsgA数据;网络设备检测到该RO上的碰撞,并成功检测到UE a发送的preamble a,未检测到UE b发送的preamble b,同时,该网络设备成功解码preamlbe a对应的MsgA数据,但解出的MsgA数据来自其他UE并非UE a发送的MsgA数据;该网络设备在随机接入响应MAC PDU中发送针对其他UE的2-step随机接入响应MsgB,并且,该网络设备在该随机接入MAC PDU中包含一个退避指示。这样,虽然UE a收到了随机接入响应MsgB,但其中的竞争解决信息与所发送的MsgA数据不匹配,并且收到了退避指示,而发送4-step随机接入前导码,即Msg1;而UE b由于即没有收到4-step随机接入响应也没有收到MsgB,并且收到了退避指示,也同样发送4-step随机接入前导码,即Msg1。
在本实施例中,除了以上列举出的在发起随机接入之后且随机接入过程未完成时选择随机接入的类型的示例之外,还可以是:在发起随机接入之后,且正在进行的2步(2-step)随机接入过程未完成时,选择后续进行2步(2-step)随机接入过程;或者,在发起随机接入之后,且正在进行的4步(4-step)随机接入过程未完成时,选 择后续进行4步(4-step)随机接入过程。
例如,在发起随机接入之后且正在进行的2步(2-step)随机接入过程未完成时,在以下的至少一种情况下,选择后续进行2步(2-step)随机接入过程:
向网络设备发送包含前导码和数据的MsgA消息后未收到来自该网络设备的随机接入响应;
向网络设备发送包含前导码和数据的MsgA消息后收到来自该网络设备的2步(2-step)随机接入响应MsgB消息,但该MsgB消息中包含的竞争解决信息与向该网络设备发送的MsgA消息的数据不匹配;
发送2步(2-step)随机接入前导码的次数达到第九阈值;
发送2步(2-step)随机接入前导码的功率达到第十阈值;以及
发送MsgA消息的PUSCH数据的功率达到第十一阈值。
又例如,在发起随机接入之后且正在进行的4步(4-step)随机接入过程未完成时,在以下的至少一种情况下,选择后续进行4步(4-step)随机接入过程:
向网络设备发送4步(4-step)随机接入前导码后未收到来自该网络设备的随机接入响应;
向网络设备发送4步(4-step)随机接入Msg3消息后,未收到来自该网络设备的4-step随机接入竞争解决消息;
向网络设备发送4步(4-step)随机接入Msg3消息后收到来自该网络设备的4步(4-step)随机接入竞争解决消息,但该竞争解决消息中包含的信息与向该网络设备发送的Msg3消息不匹配;
发送4步(4-step)随机接入前导码的次数达到第十二阈值;
发送4步(4-step)随机接入前导码的功率达到第十三阈值;以及
发送Msg3消息的功率达到第十四阈值。
在本实施例中,第九阈值至第十三阈值的数值可以根据实际情况而确定。
由上述实施例可知,通过选择随机接入过程的类型并使用选择的随机接入过程的类型进行随机接入,提供了一种随机接入类型的选择机制,能够根据实际情况而选择并使用合适的随机接入过程的类型,因此能够提高随机接入的成功率,缩短数据传输时延,提高系统性能。
实施例2
本发明实施例提供了一种选择随机接入类型的方法,该方法应用于网络设备侧。其对应于实施例1中所述的应用于用户设备侧的选择随机接入类型的方法,相同或相关的内容可以参照实施例1中的记载。
图8是本发明实施例2的选择随机接入类型的方法的一示意图。如图8所示,该方法包括:
步骤801:向用户设备发送与选择随机接入过程的类型相关的信息,使得该用户设备根据该信息选择随机接入过程的类型,以及使用选择的随机接入过程的类型进行随机接入;
其中,该随机接入过程的类型包括4步(4-step)随机接入过程或2步(2-step)随机接入过程。
在本实施例中,该向用户设备发送与选择随机接入过程的类型相关的信息,包括:在该用户设备发起随机接入前,向该用户设备发送与选择随机接入过程的类型相关的信息,以使该用户设备在发起随机接入时选择随机接入过程的类型;或者,在该用户设备发起随机接入后且随机接入过程未完成时,向该用户设备发送与选择随机接入过程类型相关的信息,以使该用户设备选择后续继续进行的随机接入过程。
在本实施例中,该方法还可以包括:
步骤802:根据2步(2-step)随机接入和4步(4-step)随机接入的物理随机接入信道(PRACH)资源的碰撞情况和/或2步(2-step)随机接入的物理上行数据信道(PUSCH)的解调情况,确定向该用户设备发送与选择随机接入过程类型相关的信息。
在本实施例中,该与选择随机接入过程类型相关的信息可以通过系统广播信息或随机接入响应发送。
在本实施例中,该与选择随机接入过程类型相关的信息通过显式或隐式的方式指示随机接入过程的类型。
在本实施例中,该在该用户设备发起随机接入后且随机接入过程未完成时,向该用户设备发送与选择随机接入过程类型相关的信息,包括:在该用户设备发起随机接入之后,且正在进行的2步(2-step)随机接入过程未完成时,向该用户设备发送与选择随机接入过程类型相关的信息,以使该用户设备选择后续进行4-step随机接入过程。
在本实施例中,该向该用户设备发送与选择随机接入过程类型相关的信息,包括:当收到该用户设备发送的随机接入MsgA消息的前导码后,向该用户设备发送与选择4步(4-step)随机接入过程相关的信息,以使该用户设备选择后续发送4步(4-step)随机接入的前导码。
例如,该与选择4步(4-step)随机接入过程相关的信息可以包括:在随机接入响应MAC层PDU中发送的退避指示信息或回退4-step随机接入指示信息,或者,该网络设备在系统广播信息中发送的回退4-step随机接入指示信息。
在本实施例中,该向该用户设备发送与选择随机接入过程类型相关的信息,包括:当收到该用户设备发送的2步(2-step)随机接入MsgA消息的前导码后,向该用户设备发送与选择4步(4-step)随机接入过程相关的信息,以使该用户设备选择后续发送4步(4-step)随机接入的Msg3。例如,该与选择4步(4-step)随机接入过程相关的信息可以包括:指示发送4步(4-step)随机接入Msg3的随机接入响应。
在本实施例中,上述各个步骤的实施可以参照实施例1中的相关记载,此处不再具体说明。
由上述实施例可知,通过选择随机接入过程的类型并使用选择的随机接入过程的类型进行随机接入,提供了一种随机接入类型的选择机制,能够根据实际情况而选择并使用合适的随机接入过程的类型,因此能够提高随机接入的成功率,缩短数据传输时延,提高系统性能。
实施例3
本发明实施例提供了一种用于选择随机接入类型的方法,该方法应用于网络设备侧和用户设备侧,其对应于实施例1中所述的应用于用户设备侧的选择随机接入类型的方法和实施例2中所述的应用于网络设备侧的选择随机接入类型的方法,相同或相关的内容可以参照实施例1和实施例2中的记载。
图9是本发明实施例3的选择随机接入类型的方法的一示意图。如图9所示,该方法包括:
步骤901:根据2步(2-step)随机接入和4步(4-step)随机接入的物理随机接入信道(PRACH)资源的碰撞情况和/或2步(2-step)随机接入的物理上行数据信道(PUSCH)的解调情况,确定向该用户设备发送与选择随机接入过程类型相关的信息;
步骤902:向用户设备发送与选择随机接入过程的类型相关的信息;
步骤903:用户设备根据该与选择随机接入过程的类型相关的信息,选择随机接入过程的类型;以及
步骤904:使用选择的随机接入过程的类型,进行随机接入。
图10是本发明实施例3的选择随机接入类型的方法的另一示意图。如图10所示,该方法包括:
步骤1001:用户设备自主选择随机接入过程的类型;
步骤1002:使用选择的随机接入过程的类型,进行随机接入。
在本实施例中,上述各个步骤的实施可以参照实施例1和实施例2中的记载,此处不再重复说明。
由上述实施例可知,通过选择随机接入过程的类型并使用选择的随机接入过程的类型进行随机接入,提供了一种随机接入类型的选择机制,能够根据实际情况而选择并使用合适的随机接入过程的类型,因此能够提高随机接入的成功率,缩短数据传输时延,提高系统性能。
实施例4
本发明实施例提供了一种选择随机接入类型的装置,该装置可以配置于用户设备侧。由于该装置解决问题的原理与实施例1的方法类似,因此其具体的实施可以参照实施例1所述的方法的实施,内容相同或相关之处不再重复说明。
图11是本发明实施例4的选择随机接入类型的装置的一示意图,如图11所示,装置1100包括:
第一选择单元1101,其用于选择随机接入过程的类型;以及
第一接入单元1102,其用于使用选择的随机接入过程的类型,进行随机接入;
其中,该随机接入过程的类型包括4步(4-step)随机接入过程或2步(4-step)随机接入过程。
图12是本发明实施例4的第一选择单元的一示意图,如图12所示,第一选择单元1101包括:
第二选择单元1201,其用于自主选择随机接入过程的类型;或者,
第三选择单元1202,其用于根据网络设备发送的与选择随机接入过程类型相关的信息,选择随机接入过程的类型。
图13是本发明实施例4的第二选择单元的一示意图,如图13所示,第二选择单元1201包括:
第四选择单元1301,其用于根据该网络设备和该用户设备之间的信道质量选择随机接入过程的类型,或者,
第五选择单元1302,其用于根据2步随机接入过程的MsgA数据的调制和编码方式(MCS)、MsgA的MAC层数据大小或MsgA数据占用的物理资源大小,选择随机接入过程的类型。
在本实施例中,上述各个单元的功能的实现可以参照实施例1中相应步骤的记载,此处不再重复说明。
由上述实施例可知,通过选择随机接入过程的类型并使用选择的随机接入过程的类型进行随机接入,提供了一种随机接入类型的选择机制,能够根据实际情况而选择并使用合适的随机接入过程的类型,因此能够提高随机接入的成功率,缩短数据传输时延,提高系统性能。
实施例5
本发明实施例提供了一种选择随机接入类型的装置,该装置可以配置于网络设备侧。由于该装置解决问题的原理与实施例2的方法类似,因此其具体的实施可以参照实施例2所述的方法的实施,内容相同或相关之处不再重复说明。
图14是本发明实施例5的选择随机接入类型的装置的一示意图,如图14所示,装置1400包括:
第一发送单元1401,其用于向用户设备发送与选择随机接入过程的类型相关的信息,使得该用户设备根据该信息选择随机接入过程的类型,以及使用选择的随机接入过程的类型进行随机接入;
其中,该随机接入过程的类型包括4步(4-step)随机接入过程或2步(4-step)随机接入过程。
在本实施例中,该装置1400还可以包括:
第一确定单元1402,其用于根据2步(2-step)随机接入和4步(4-step)随机接入的物理随机接入信道(PRACH)资源的碰撞情况和/或2步(2-step)随机接入的物理上行数据信道(PUSCH)的解调情况,确定向该用户设备发送与选择随机接入过程类型相关的信息。
在本实施例中,上述各个单元的功能的实现可以参照实施例1中相应步骤的记载,此处不再重复说明。
由上述实施例可知,通过选择随机接入过程的类型并使用选择的随机接入过程的类型进行随机接入,提供了一种随机接入类型的选择机制,能够根据实际情况而选择并使用合适的随机接入过程的类型,因此能够提高随机接入的成功率,缩短数据传输时延,提高系统性能。
实施例6
本发明实施例提供了一种用户设备,该用户设备包括如实施例4所述的选择随机接入类型的装置。
图15是本发明实施例6的用户设备的系统构成的一示意框图。如图15所示,用户设备1500可以包括处理器1510和存储器1520;存储器1520耦合到处理器1510。值得注意的是,该图是示例性的;还可以使用其他类型的结构,来补充或代替该结构,以实现电信功能或其他功能。
在一个实施方式中,选择随机接入类型的装置的功能可以被集成到处理器1510中。其中,处理器1510可以被配置为:选择随机接入过程的类型;以及使用选择的随机接入过程的类型,进行随机接入;其中,该随机接入过程的类型包括4步(4-step)随机接入过程或2步(4-step)随机接入过程。
在另一个实施方式中,选择随机接入类型的装置可以与处理器1510分开配置,例如可以将选择随机接入类型的装置配置为与处理器1510连接的芯片,通过处理器1510的控制来实现选择随机接入类型的装置的功能。
如图15所示,该用户设备1500还可以包括:通信模块1530、输入单元1540、显示器1550、电源1560。值得注意的是,用户设备1500也并不是必须要包括图15中所示的所有部件;此外,用户设备1500还可以包括图15中没有示出的部件,可以参考相关技术。
如图15所示,处理器1510有时也称为控制器或操作控件,可以包括微处理器或其他处理器装置和/或逻辑装置,该处理器1510接收输入并控制用户设备1500的各个部件的操作。
其中,存储器1520,例如可以是缓存器、闪存、硬驱、可移动介质、易失性存储器、非易失性存储器或其它合适装置中的一种或更多种。可储存各种数据,此外还 可存储执行有关信息的程序。并且处理器1510可执行该存储器1520存储的该程序,以实现信息存储或处理等。其他部件的功能与现有类似,此处不再赘述。用户设备1500的各部件可以通过专用硬件、固件、软件或其结合来实现,而不偏离本发明的范围。
由上述实施例可知,通过选择随机接入过程的类型并使用选择的随机接入过程的类型进行随机接入,提供了一种随机接入类型的选择机制,能够根据实际情况而选择并使用合适的随机接入过程的类型,因此能够提高随机接入的成功率,缩短数据传输时延,提高系统性能。
实施例7
本发明实施例提供了一种网络设备,该网络设备包括如实施例5所述的选择随机接入类型的装置。
图16是本发明实施例7的网络设备的一构成示意图。如图16所示,网络设备1600可以包括:处理器(processor)1610和存储器1620;存储器1620耦合到处理器1610。其中该存储器1620可存储各种数据;此外还存储信息处理的程序1630,并且在处理器1610的控制下执行该程序1630,以接收用户设备发送的各种信息、并且向用户设备发送各种信息。
在一个实施方式中,选择随机接入类型的装置的功能可以被集成到处理器1610中。其中,处理器1610可以被配置为:向用户设备发送与选择随机接入过程的类型相关的信息,使得该用户设备根据该信息选择随机接入过程的类型,以及使用选择的随机接入过程的类型进行随机接入;其中,该随机接入过程的类型包括4步(4-step)随机接入过程或2步(4-step)随机接入过程。
在另一个实施方式中,选择随机接入类型的装置可以与处理器1610分开配置,例如可以将选择随机接入类型的装置配置为与处理器1610连接的芯片,通过处理器1610的控制来实现选择随机接入类型的装置的功能。
此外,如图16所示,网络设备1600还可以包括:收发机1640和天线1650等;其中,上述部件的功能与现有技术类似,此处不再赘述。值得注意的是,网络设备1600也并不是必须要包括图16中所示的所有部件;此外,网络设备1600还可以包括图16中没有示出的部件,可以参考现有技术。
由上述实施例可知,通过选择随机接入过程的类型并使用选择的随机接入过程的 类型进行随机接入,提供了一种随机接入类型的选择机制,能够根据实际情况而选择并使用合适的随机接入过程的类型,因此能够提高随机接入的成功率,缩短数据传输时延,提高系统性能。
实施例8
本发明实施例提供了一种通信系统,包括如实施例6所述的用户设备和/或如实施例7所述的网络设备。
例如,该通信系统的结构可以参照图4,如图4所示,通信系统100包括网络设备101和用户设备102,用户设备102与实施例6中记载的用户设备相同,网络设备101与实施例7中记载的网络设备相同,重复的内容不再赘述。
由上述实施例可知,通过选择随机接入过程的类型并使用选择的随机接入过程的类型进行随机接入,提供了一种随机接入类型的选择机制,能够根据实际情况而选择并使用合适的随机接入过程的类型,因此能够提高随机接入的成功率,缩短数据传输时延,提高系统性能。
本发明以上的装置和方法可以由硬件实现,也可以由硬件结合软件实现。本发明涉及这样的计算机可读程序,当该程序被逻辑部件所执行时,能够使该逻辑部件实现上文所述的装置或构成部件,或使该逻辑部件实现上文所述的各种方法或步骤。逻辑部件例如现场可编程逻辑部件、微处理器、计算机中使用的处理器等。本发明还涉及用于存储以上程序的存储介质,如硬盘、磁盘、光盘、DVD、flash存储器等。
结合本发明实施例描述的方法/装置可直接体现为硬件、由处理器执行的软件模块或二者组合。例如,图11中所示的功能框图中的一个或多个和/或功能框图的一个或多个组合,既可以对应于计算机程序流程的各个软件模块,亦可以对应于各个硬件模块。这些软件模块,可以分别对应于图5中所示的各个步骤。这些硬件模块例如可利用现场可编程门阵列(FPGA)将这些软件模块固化而实现。
软件模块可以位于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动磁盘、CD-ROM或者本领域已知的任何其它形式的存储介质。可以将一种存储介质耦接至处理器,从而使处理器能够从该存储介质读取信息,且可向该存储介质写入信息;或者该存储介质可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。该软件模块可以存储在移动终端的存储器中,也可以存储在可插入移动终端的存储卡中。例如,若设备(如移动终端)采用的是较大容量 的MEGA-SIM卡或者大容量的闪存装置,则该软件模块可存储在该MEGA-SIM卡或者大容量的闪存装置中。
针对附图11中描述的功能方框中的一个或多个和/或功能方框的一个或多个组合,可以实现为用于执行本发明所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图11描述的功能方框中的一个或多个和/或功能方框的一个或多个组合,还可以实现为计算设备的组合,例如,DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处理器或者任何其它这种配置。
以上结合具体的实施方式对本发明进行了描述,但本领域技术人员应该清楚,这些描述都是示例性的,并不是对本发明保护范围的限制。本领域技术人员可以根据本发明的精神和原理对本发明做出各种变型和修改,这些变型和修改也在本发明的范围内。
根据本发明实施例公开的各种实施方式,还公开了如下附记:
1、一种选择随机接入类型的装置,所述装置应用于用户设备侧,所述装置包括:
第一选择单元,其用于选择随机接入过程的类型;以及
第一接入单元,其用于使用选择的随机接入过程的类型,进行随机接入;
其中,所述随机接入过程的类型包括4步(4-step)随机接入过程或2步(4-step)随机接入过程。
2、根据附记1所述的装置,其中,所述第一选择单元包括:
第二选择单元,其用于自主选择随机接入过程的类型;或者,
第三选择单元,其用于根据网络设备发送的与选择随机接入过程类型相关的信息,选择随机接入过程的类型。
3、根据附记2所述的装置,其中,所述第二选择单元包括:
第四选择单元,其用于根据所述网络设备和所述用户设备之间的信道质量选择随机接入过程的类型,或者,
第五选择单元,其用于根据2步随机接入过程的MsgA数据的调制和编码方式(MCS)、MsgA的MAC层数据大小或MsgA数据占用的物理资源大小,选择随机接入过程的类型。
4、根据附记3所述的装置,其中,所述第四选择单元
当所述信道质量满足第一预设条件时选择所述2步(2-step)随机接入过程,
当所述信道质量不满足所述第一预设条件时选择所述4步(2-step)随机接入过程。
5、根据附记4所述的装置,其中,
所述第一预设条件是以下条件中的至少一个:
所述网络设备到所述用户设备的路径损耗小于第一阈值;
所述网络设备发送的参考信号的RSRP值高于第二阈值;以及
所述网络设备发送的参考信号的RSRQ值高于第三阈值;
其中,所述参考信号包括同步参考信号(SS-RS)或信道状态信息参考信号(CSI-RS)。
6、根据附记3所述的装置,其中,所述第五选择单元
当所述MsgA数据的调制和编码方式(MCS)大于第四阈值时选择所述4步(4-step)随机接入过程,
当所述MsgA数据的调制和编码方式小于或等于所述第四阈值时选择所述2步(2-step)随机接入过程。
7、根据附记3所述的装置,其中,所述第五选择单元
当所述MsgA的MAC层的数据大小大于第五阈值时选择所述4步(4-step)随机接入过程,
当所述MsgA的MAC层的数据大小小于或等于所述第五阈值时选择所述2步(2-step)随机接入过程。
8、根据附记3所述的装置,其中,所述第五选择单元
当所述MsgA数据占用的物理资源块(PRB)个数大于第十五阈值时选择所述4步(4-step)随机接入过程,当所述MsgA数据占用的物理资源块个数小于或等于所述第十五阈值时选择所述2步(2-step)随机接入过程。
9、根据附记2所述的装置,其中,
所述与选择随机接入过程类型相关的信息通过系统广播信息或随机接入响应发送。
10、根据附记2所述的装置,其中,
所述与选择随机接入过程类型相关的信息通过显式或隐式的方式指示随机接入过程的类型。
11、根据附记1-10中的任一项所述的装置,其中,所述第一选择单元
在发起随机接入时选择随机接入过程的类型,或者,在发起随机接入之后且随机接入过程未完成时,选择后续继续进行的随机接入过程的类型。
12、根据附记11所述的装置,其中,
所述发起随机接入由MAC层上行业务数据或RRC层发送的CCCH数据触发。
13、根据附记11所述的装置,其中,所述第一选择单元
在发起随机接入之后,且正在进行的2步(2-step)随机接入过程未完成时,选择后续进行4步(4-step)随机接入过程。
14、根据附记13所述的装置,其中,所述第一选择单元选择后续发送4步(4-step)随机接入的前导码或发送4步(4-step)随机接入的Msg3。
15、根据附记14所述的装置,其中,
所述第一选择单元在发起随机接入之后且正在进行的2步(2-step)随机接入过程未完成时,在以下的至少一种情况下,选择后续发送所述4步(4-step)随机接入的前导码:
向网络设备发送2-step随机接入的Msg A的前导码和数据后未收到来自所述网络设备的随机接入响应,所述随机接入响应包括指示发送4步(4-step)随机接入Msg3的随机接入响应或2-step随机接入响应MsgB消息;
向网络设备发送2-step随机接入的MsgA的前导码和数据的后收到来自所述网络设备的2步(2-step)随机接入响应MsgB消息,但所述MsgB消息中包含的竞争解决信息与向所述网络设备发送的MsgA消息的PUSCH数据不匹配;
向网络设备发送2-step随机接入的MsgA的前导码和数据后收到所述网络设备发送的与选择4步(4-step)随机接入过程相关的信息;
发送2步(2-step)随机接入前导码的次数达到第六阈值;
发送2步(2-step)随机接入前导码的功率达到第七阈值;以及
发送MsgA消息的PUSCH数据的功率达到第八阈值。
16、根据附记15所述的装置,其中,所述网络设备发送的与选择4步(4-step)随机接入过程相关的信息,包括:
所述网络设备在随机接入响应MAC层PDU中发送的退避指示信息或回退4-step随机接入指示信息,或者,所述网络设备在系统广播信息中发送的回退4-step随机接入指示信息。
17、根据附记14所述的装置,其中,
所述第一选择单元在发起随机接入之后且正在进行的2步(2-step)随机接入过程未完成时,选择后续发送4步(4-step)随机接入的Msg3,包括:
向网络设备发送包含前导码和数据的MsgA消息后,收到来自网络设备的指示发送4步(4-step)随机接入Msg3的随机接入响应,选择后续发送4步(4-step)随机接入的Msg3。
18、根据附记17所述的装置,其中,发送的所述4步随机接入的Msg3包含发送的所述MsgA消息中的所述数据。
19、根据附记11所述的装置,其中,所述第一选择单元
在发起随机接入之后,且正在进行的2步(2-step)随机接入过程未完成时,选择后续进行2步(4-step)随机接入过程;或者,
在发起随机接入之后,且正在进行的4步(4-step)随机接入过程未完成时,选择后续进行4步(4-step)随机接入过程。
20、根据附记19所述的装置,其中,所述第一选择单元在发起随机接入之后且正在进行的2步(2-step)随机接入过程未完成时,在以下的至少一种情况下,选择后续进行2步(2-step)随机接入过程:
向网络设备发送包含前导码和数据的MsgA消息后未收到来自所述网络设备的随机接入响应;
向网络设备发送包含前导码和数据的MsgA消息后收到来自所述网络设备的2步(2-step)随机接入响应MsgB消息,但所述MsgB消息中包含的竞争解决信息与向所述网络设备发送的MsgA消息的数据不匹配;
发送2步(2-step)随机接入前导码的次数达到第九阈值;
发送2步(2-step)随机接入前导码的功率达到第十阈值;以及
发送MsgA消息的PUSCH数据的功率达到第十一阈值。
21、根据附记19所述的装置,其中,所述第一选择单元在发起随机接入之后且正在进行的4步(4-step)随机接入过程未完成时,在以下的至少一种情况下,选择 后续进行4步(4-step)随机接入过程:
向网络设备发送4步(4-step)随机接入前导码后未收到来自所述网络设备的随机接入响应;
向网络设备发送4步(4-step)随机接入Msg3消息后,未收到来自所述网络设备的4-step随机接入竞争解决消息;
向网络设备发送4步(4-step)随机接入Msg3消息后收到来自所述网络设备的4步(4-step)随机接入竞争解决消息,但所述竞争解决消息中包含的信息与向所述网络设备发送的Msg3消息不匹配;
发送4步(4-step)随机接入前导码的次数达到第十二阈值;
发送4步(4-step)随机接入前导码的功率达到第十三阈值;以及
发送Msg3消息的功率达到第十四阈值。
22、一种选择随机接入类型的装置,所述装置应用于网络设备侧,所述装置包括:
第一发送单元,其用于向用户设备发送与选择随机接入过程的类型相关的信息,使得所述用户设备根据所述信息选择随机接入过程的类型,以及使用选择的随机接入过程的类型进行随机接入;
其中,所述随机接入过程的类型包括4步(4-step)随机接入过程或2步(4-step)随机接入过程。
23、根据附记22所述的装置,其中,所述第一发送单元
在所述用户设备发起随机接入前,向所述用户设备发送与选择随机接入过程的类型相关的信息,以使所述用户设备在发起随机接入时选择随机接入过程的类型;或者,
在所述用户设备发起随机接入后且随机接入过程未完成时,向所述用户设备发送与选择随机接入过程类型相关的信息,以使所述用户设备选择后续继续进行的随机接入过程。
24、根据附记22所述的装置,其中,所述装置还包括:
第一确定单元,其用于根据2步(2-step)随机接入和4步(4-step)随机接入的物理随机接入信道(PRACH)资源的碰撞情况和/或2步(2-step)随机接入的物理上行数据信道(PUSCH)的解调情况,确定向所述用户设备发送与选择随机接入过程类型相关的信息。
25、根据附记22-24中的任一项所述的装置,其中,
所述与选择随机接入过程类型相关的信息通过系统广播信息或随机接入响应发送。
26、根据附记22-25中的任一项所述的装置,其中,
所述与选择随机接入过程类型相关的信息通过显式或隐式的方式指示随机接入过程的类型。
27、根据附记23所述的装置,其中,所述与选择随机接入过程类型相关的信息第一发送单元
在所述用户设备发起随机接入之后,且正在进行的2步(2-step)随机接入过程未完成时,向所述用户设备发送与选择随机接入过程类型相关的信息,以使所述用户设备选择后续进行4-step随机接入过程。
28、根据附记27所述的装置,其中,所述与选择随机接入过程类型相关的信息第一发送单元
当收到所述用户设备发送的随机接入MsgA消息的前导码后,向所述用户设备发送与选择4步(4-step)随机接入过程相关的信息,以使所述用户设备选择后续发送4步(4-step)随机接入的前导码。
29、根据附记28所述的装置,其中,所述与选择4步(4-step)随机接入过程相关的信息,包括:
在随机接入响应MAC层PDU中发送的退避指示信息或回退4-step随机接入指示信息,或者,所述网络设备在系统广播信息中发送的回退4-step随机接入指示信息。
30、根据附记27所述的装置,其中,所述与选择随机接入过程类型相关的信息第一发送单元
当收到所述用户设备发送的2步(2-step)随机接入MsgA消息的前导码后,向所述用户设备发送与选择4步(4-step)随机接入过程相关的信息,以使所述用户设备选择后续发送4步(4-step)随机接入的Msg3。
31、根据附记30所述的装置,其中,所述与选择4步(4-step)随机接入过程相关的信息,包括:指示发送4步(4-step)随机接入Msg3的随机接入响应。
32、一种用户设备,所述用户设备包括根据附记1-21中的任一项所述的装置。
33、一种网络设备,所述网络设备包括根据附记22-31中的任一项所述的装置。
34、一种通信系统,包括根据附记32所述的用户设备和/或根据附记33所述的 网络设备。
35、一种选择随机接入类型的方法,所述方法应用于用户设备侧,所述方法包括:
选择随机接入过程的类型;以及
使用选择的随机接入过程的类型,进行随机接入;
其中,所述随机接入过程的类型包括4步(4-step)随机接入过程或2步(4-step)随机接入过程。
36、根据附记35所述的方法,其中,所述选择随机接入过程的类型,包括:
自主选择随机接入过程的类型;或者,
根据网络设备发送的与选择随机接入过程类型相关的信息,选择随机接入过程的类型。
37、根据附记36所述的方法,其中,所述自主选择随机接入过程的类型,包括:
根据所述网络设备和所述用户设备之间的信道质量选择随机接入过程的类型,或者,
根据2步随机接入过程的MsgA数据的调制和编码方式(MCS)、MsgA的MAC层数据大小或MsgA数据占用的物理资源大小,选择随机接入过程的类型。
38、根据附记37所述的方法,其中,根据信道质量选择随机接入过程的类型,包括:
当所述信道质量满足第一预设条件时选择所述2步(2-step)随机接入过程,
当所述信道质量不满足所述第一预设条件时选择所述4步(2-step)随机接入过程。
39、根据附记38所述的方法,其中,
所述第一预设条件是以下条件中的至少一个:
所述网络设备到所述用户设备的路径损耗小于第一阈值;
所述网络设备发送的参考信号的RSRP值高于第二阈值;以及
所述网络设备发送的参考信号的RSRQ值高于第三阈值;
其中,所述参考信号包括同步参考信号(SS-RS)或信道状态信息参考信号(CSI-RS)。
40、根据附记37所述的方法,其中,所述根据调制和编码方式(MCS),选择随机接入过程的类型,包括:
当所述MsgA数据的调制和编码方式(MCS)大于第四阈值时选择所述4步(4-step)随机接入过程,
当所述MsgA数据的调制和编码方式小于或等于所述第四阈值时选择所述2步(2-step)随机接入过程。
41、根据附记37所述的方法,其中,所述根据MsgA的MAC层数据大小,选择随机接入过程的类型,包括:
当所述MsgA的MAC层的数据大小大于第五阈值时选择所述4步(4-step)随机接入过程,
当所述MsgA的MAC层的数据大小小于或等于所述第五阈值时选择所述2步(2-step)随机接入过程。
42、根据附记37所述的方法,其中,所述根据MsgA数据占用的物理资源大小,选择随机接入过程的类型,包括:
当所述MsgA数据占用的物理资源块(PRB)个数大于第十五阈值时选择所述4步(4-step)随机接入过程,当所述MsgA数据占用的物理资源块个数小于或等于所述第十五阈值时选择所述2步(2-step)随机接入过程。
43、根据附记36所述的方法,其中,
所述与选择随机接入过程类型相关的信息通过系统广播信息或随机接入响应发送。
44、根据附记36所述的方法,其中,
所述与选择随机接入过程类型相关的信息通过显式或隐式的方式指示随机接入过程的类型。
45、根据附记35-44中的任一项所述的方法,其中,所述选择随机接入过程的类型,包括:
在发起随机接入时选择随机接入过程的类型,或者,在发起随机接入之后且随机接入过程未完成时,选择后续继续进行的随机接入过程的类型。
46、根据附记45所述的方法,其中,
所述发起随机接入由MAC层上行业务数据或RRC层发送的CCCH数据触发。
47、根据附记45所述的方法,其中,所述在发起随机接入之后且随机接入过程未完成时,选择随机接入的类型,包括:
在发起随机接入之后,且正在进行的2步(2-step)随机接入过程未完成时,选择后续进行4步(4-step)随机接入过程。
48、根据附记47所述的方法,其中,所述选择后续进行4步(4-step)随机接入过程,包括:
选择后续发送4步(4-step)随机接入的前导码或发送4步(4-step)随机接入的Msg3。
49、根据附记48所述的方法,其中,
在发起随机接入之后且正在进行的2步(2-step)随机接入过程未完成时,在以下的至少一种情况下,选择后续发送所述4步(4-step)随机接入的前导码:
向网络设备发送2-step随机接入的Msg A的前导码和数据后未收到来自所述网络设备的随机接入响应,所述随机接入响应包括指示发送4步(4-step)随机接入Msg3的随机接入响应或2-step随机接入响应MsgB消息;
向网络设备发送2-step随机接入的MsgA的前导码和数据的后收到来自所述网络设备的2步(2-step)随机接入响应MsgB消息,但所述MsgB消息中包含的竞争解决信息与向所述网络设备发送的MsgA消息的PUSCH数据不匹配;
向网络设备发送2-step随机接入的MsgA的前导码和数据后收到所述网络设备发送的与选择4步(4-step)随机接入过程相关的信息;
发送2步(2-step)随机接入前导码的次数达到第六阈值;
发送2步(2-step)随机接入前导码的功率达到第七阈值;以及
发送MsgA消息的PUSCH数据的功率达到第八阈值。
50、根据附记49所述的方法,其中,所述网络设备发送的与选择4步(4-step)随机接入过程相关的信息,包括:
所述网络设备在随机接入响应MAC层PDU中发送的退避指示信息或回退4-step随机接入指示信息,或者,所述网络设备在系统广播信息中发送的回退4-step随机接入指示信息。
51、根据附记48所述的方法,其中,
在发起随机接入之后且正在进行的2步(2-step)随机接入过程未完成时,选择后续发送4步(4-step)随机接入的Msg3,包括:
向网络设备发送包含前导码和数据的MsgA消息后,收到来自网络设备的指示发 送4步(4-step)随机接入Msg3的随机接入响应,选择后续发送4步(4-step)随机接入的Msg3。
52、根据附记51所述的方法,其中,发送的所述4步随机接入的Msg3包含发送的所述MsgA消息中的所述数据。
53、根据附记45所述的方法,其中,所述在发起随机接入之后且随机接入过程未完成时,选择随机接入的类型,包括:
在发起随机接入之后,且正在进行的2步(2-step)随机接入过程未完成时,选择后续进行2步(4-step)随机接入过程;或者,
在发起随机接入之后,且正在进行的4步(4-step)随机接入过程未完成时,选择后续进行4步(4-step)随机接入过程。
54、根据附记53所述的方法,其中,在发起随机接入之后且正在进行的2步(2-step)随机接入过程未完成时,在以下的至少一种情况下,选择后续进行2步(2-step)随机接入过程:
向网络设备发送包含前导码和数据的MsgA消息后未收到来自所述网络设备的随机接入响应;
向网络设备发送包含前导码和数据的MsgA消息后收到来自所述网络设备的2步(2-step)随机接入响应MsgB消息,但所述MsgB消息中包含的竞争解决信息与向所述网络设备发送的MsgA消息的数据不匹配;
发送2步(2-step)随机接入前导码的次数达到第九阈值;
发送2步(2-step)随机接入前导码的功率达到第十阈值;以及
发送MsgA消息的PUSCH数据的功率达到第十一阈值。
55、根据附记53所述的方法,其中,在发起随机接入之后且正在进行的4步(4-step)随机接入过程未完成时,在以下的至少一种情况下,选择后续进行4步(4-step)随机接入过程:
向网络设备发送4步(4-step)随机接入前导码后未收到来自所述网络设备的随机接入响应;
向网络设备发送4步(4-step)随机接入Msg3消息后,未收到来自所述网络设备的4-step随机接入竞争解决消息;
向网络设备发送4步(4-step)随机接入Msg3消息后收到来自所述网络设备的4 步(4-step)随机接入竞争解决消息,但所述竞争解决消息中包含的信息与向所述网络设备发送的Msg3消息不匹配;
发送4步(4-step)随机接入前导码的次数达到第十二阈值;
发送4步(4-step)随机接入前导码的功率达到第十三阈值;以及
发送Msg3消息的功率达到第十四阈值。
56、一种选择随机接入类型的方法,所述方法应用于网络设备侧,所述方法包括:
向用户设备发送与选择随机接入过程的类型相关的信息,使得所述用户设备根据所述信息选择随机接入过程的类型,以及使用选择的随机接入过程的类型进行随机接入;
其中,所述随机接入过程的类型包括4步(4-step)随机接入过程或2步(4-step)随机接入过程。
57、根据附记56所述的方法,其中,所述向用户设备发送与选择随机接入过程的类型相关的信息,包括:
在所述用户设备发起随机接入前,向所述用户设备发送与选择随机接入过程的类型相关的信息,以使所述用户设备在发起随机接入时选择随机接入过程的类型;或者,
在所述用户设备发起随机接入后且随机接入过程未完成时,向所述用户设备发送与选择随机接入过程类型相关的信息,以使所述用户设备选择后续继续进行的随机接入过程。
58、根据附记56所述的方法,其中,所述方法还包括:
根据2步(2-step)随机接入和4步(4-step)随机接入的物理随机接入信道(PRACH)资源的碰撞情况和/或2步(2-step)随机接入的物理上行数据信道(PUSCH)的解调情况,确定向所述用户设备发送与选择随机接入过程类型相关的信息。
59、根据附记56-58中的任一项所述的方法,其中,
所述与选择随机接入过程类型相关的信息通过系统广播信息或随机接入响应发送。
60、根据附记56-59中的任一项所述的方法,其中,
所述与选择随机接入过程类型相关的信息通过显式或隐式的方式指示随机接入过程的类型。
61、根据附记57所述的方法,其中,所述在所述用户设备发起随机接入后且随 机接入过程未完成时,向所述用户设备发送与选择随机接入过程类型相关的信息,包括:
在所述用户设备发起随机接入之后,且正在进行的2步(2-step)随机接入过程未完成时,向所述用户设备发送与选择随机接入过程类型相关的信息,以使所述用户设备选择后续进行4-step随机接入过程。
62、根据附记61所述的方法,其中,所述向所述用户设备发送与选择随机接入过程类型相关的信息,包括:
当收到所述用户设备发送的随机接入MsgA消息的前导码后,向所述用户设备发送与选择4步(4-step)随机接入过程相关的信息,以使所述用户设备选择后续发送4步(4-step)随机接入的前导码。
63、根据附记62所述的方法,其中,所述与选择4步(4-step)随机接入过程相关的信息,包括:
在随机接入响应MAC层PDU中发送的退避指示信息或回退4-step随机接入指示信息,或者,所述网络设备在系统广播信息中发送的回退4-step随机接入指示信息。
64、根据附记61所述的方法,其中,所述向所述用户设备发送与选择随机接入过程类型相关的信息,包括:
当收到所述用户设备发送的2步(2-step)随机接入MsgA消息的前导码后,向所述用户设备发送与选择4步(4-step)随机接入过程相关的信息,以使所述用户设备选择后续发送4步(4-step)随机接入的Msg3。
65、根据附记64所述的方法,其中,所述与选择4步(4-step)随机接入过程相关的信息,包括:指示发送4步(4-step)随机接入Msg3的随机接入响应。

Claims (20)

  1. 一种选择随机接入类型的装置,所述装置应用于用户设备侧,所述装置包括:
    第一选择单元,其用于选择随机接入过程的类型;以及
    第一接入单元,其用于使用选择的随机接入过程的类型,进行随机接入;
    其中,所述随机接入过程的类型包括4步(4-step)随机接入过程或2步(4-step)随机接入过程。
  2. 根据权利要求1所述的装置,其中,所述第一选择单元包括:
    第二选择单元,其用于自主选择随机接入过程的类型;或者,
    第三选择单元,其用于根据网络设备发送的与选择随机接入过程类型相关的信息,选择随机接入过程的类型。
  3. 根据权利要求2所述的装置,其中,所述第二选择单元包括:
    第四选择单元,其用于根据所述网络设备和所述用户设备之间的信道质量选择随机接入过程的类型,或者,
    第五选择单元,其用于根据2步随机接入过程的MsgA数据的调制和编码方式(MCS)、MsgA的MAC层数据大小或MsgA数据占用的物理资源大小,选择随机接入过程的类型。
  4. 根据权利要求3所述的装置,其中,所述第五选择单元
    当所述MsgA数据的调制和编码方式(MCS)大于第四阈值时选择所述4步(4-step)随机接入过程,
    当所述MsgA数据的调制和编码方式小于或等于所述第四阈值时选择所述2步(2-step)随机接入过程。
  5. 根据权利要求3所述的装置,其中,所述第五选择单元
    当所述MsgA的MAC层的数据大小大于第五阈值时选择所述4步(4-step)随机接入过程,
    当所述MsgA的MAC层的数据大小小于或等于所述第五阈值时选择所述2步(2-step)随机接入过程。
  6. 根据权利要求2所述的装置,其中,
    所述与选择随机接入过程类型相关的信息通过系统广播信息或随机接入响应发 送。
  7. 根据权利要求1所述的装置,其中,
    所述第一选择单元在发起随机接入时选择随机接入过程的类型,或者,在发起随机接入之后且随机接入过程未完成时,选择后续继续进行的随机接入过程的类型。
  8. 根据权利要求7所述的装置,其中,
    所述第一选择单元在发起随机接入之后,且正在进行的2步(2-step)随机接入过程未完成时,选择后续进行4步(4-step)随机接入过程。
  9. 根据权利要求8所述的装置,其中,所述第一选择单元选择后续发送4步(4-step)随机接入的前导码或发送4步(4-step)随机接入的Msg3。
  10. 根据权利要求9所述的装置,其中,
    所述第一选择单元在发起随机接入之后且正在进行的2步(2-step)随机接入过程未完成时,在以下的至少一种情况下,选择后续发送所述4步(4-step)随机接入的前导码:
    向网络设备发送2-step随机接入的Msg A的前导码和数据后未收到来自所述网络设备的随机接入响应,所述随机接入响应包括指示发送4步(4-step)随机接入Msg3的随机接入响应或2-step随机接入响应MsgB消息;
    向网络设备发送2-step随机接入的MsgA的前导码和数据的后收到来自所述网络设备的2步(2-step)随机接入响应MsgB消息,但所述MsgB消息中包含的竞争解决信息与向所述网络设备发送的MsgA消息的PUSCH数据不匹配;
    向网络设备发送2-step随机接入的MsgA的前导码和数据后收到所述网络设备发送的与选择4步(4-step)随机接入过程相关的信息;
    发送2步(2-step)随机接入前导码的次数达到第六阈值;
    发送2步(2-step)随机接入前导码的功率达到第七阈值;以及
    发送MsgA消息的PUSCH数据的功率达到第八阈值。
  11. 根据权利要求10所述的装置,其中,所述网络设备发送的与选择4步(4-step)随机接入过程相关的信息,包括:
    所述网络设备在随机接入响应MAC层PDU中发送的退避指示信息或回退4-step随机接入指示信息,或者,所述网络设备在系统广播信息中发送的回退4-step随机接入指示信息。
  12. 根据权利要求9所述的装置,其中,
    所述第一选择单元在发起随机接入之后且正在进行的2步(2-step)随机接入过程未完成时,选择后续发送4步(4-step)随机接入的Msg3,包括:
    向网络设备发送包含前导码和数据的MsgA消息后,收到来自网络设备的指示发送4步(4-step)随机接入Msg3的随机接入响应,选择后续发送4步(4-step)随机接入的Msg3。
  13. 根据权利要求7所述的装置,其中,所述第一选择单元
    在发起随机接入之后,且正在进行的2步(2-step)随机接入过程未完成时,选择后续进行2步(4-step)随机接入过程;或者,
    在发起随机接入之后,且正在进行的4步(4-step)随机接入过程未完成时,选择后续进行4步(4-step)随机接入过程。
  14. 一种选择随机接入类型的装置,所述装置应用于网络设备侧,所述装置包括:
    第一发送单元,其用于向用户设备发送与选择随机接入过程的类型相关的信息,使得所述用户设备根据所述信息选择随机接入过程的类型,以及使用选择的随机接入过程的类型进行随机接入;
    其中,所述随机接入过程的类型包括4步(4-step)随机接入过程或2步(4-step)随机接入过程。
  15. 根据权利要求14所述的装置,其中,所述第一发送单元
    在所述用户设备发起随机接入前,向所述用户设备发送与选择随机接入过程的类型相关的信息,以使所述用户设备在发起随机接入时选择随机接入过程的类型;或者,
    在所述用户设备发起随机接入后且随机接入过程未完成时,向所述用户设备发送与选择随机接入过程类型相关的信息,以使所述用户设备选择后续继续进行的随机接入过程。
  16. 根据权利要求14所述的装置,其中,所述装置还包括:
    第一确定单元,其用于根据2步(2-step)随机接入和4步(4-step)随机接入的物理随机接入信道(PRACH)资源的碰撞情况和/或2步(2-step)随机接入的物理上行数据信道(PUSCH)的解调情况,确定向所述用户设备发送与选择随机接入过程类型相关的信息。
  17. 根据权利要求15所述的装置,其中,所述第一发送单元
    在所述用户设备发起随机接入之后,且正在进行的2步(2-step)随机接入过程未完成时,向所述用户设备发送与选择随机接入过程类型相关的信息,以使所述用户设备选择后续进行4-step随机接入过程。
  18. 根据权利要求17所述的装置,其中,
    所述第一发送单元当收到所述用户设备发送的随机接入MsgA消息的前导码后,向所述用户设备发送与选择4步(4-step)随机接入过程相关的信息,以使所述用户设备选择后续发送4步(4-step)随机接入的前导码。
  19. 根据权利要求18所述的装置,其中,所述与选择4步(4-step)随机接入过程相关的信息,包括:
    在随机接入响应MAC层PDU中发送的退避指示信息或回退4-step随机接入指示信息,或者,所述网络设备在系统广播信息中发送的回退4-step随机接入指示信息。
  20. 根据权利要求17所述的装置,其中,所述第一发送单元
    当收到所述用户设备发送的2步(2-step)随机接入MsgA消息的前导码后,向所述用户设备发送与选择4步(4-step)随机接入过程相关的信息,以使所述用户设备选择后续发送4步(4-step)随机接入的Msg3。
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