WO2020191515A1 - 一种随机接入方法及装置、终端、网络设备 - Google Patents
一种随机接入方法及装置、终端、网络设备 Download PDFInfo
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
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- the embodiments of the present application relate to the field of mobile communication technology, and in particular to a random access method and device, terminal, and network equipment.
- a window is opened, and the terminal detects a random access response (Random Access Response, RAR) in this window.
- RAR Random Access Response
- the maximum window of RAR is 10ms.
- PRACH Physical Random Access Channel
- the embodiments of the application provide a random access method and device, terminal, and network equipment.
- the terminal receives a first random access response in a first window, where the first random access response carries first information, and the first information is used to indicate a random access channel associated with the first random access response.
- the base station sends at least one random access response in the first window; wherein the random access response carries first information, and the first information is used to indicate a random access channel associated with the random access response.
- the receiving unit is configured to receive a first random access response in a first window, where the first random access response carries first information, and the first information is used to indicate the random access associated with the first random access response Into the channel.
- the sending unit is configured to send at least one random access response in the first window; wherein the random access response carries first information, and the first information is used to indicate a random access channel associated with the random access response.
- the terminal provided in the embodiment of the present application includes a processor and a memory.
- the memory is used to store a computer program
- the processor is used to call and run the computer program stored in the memory to execute the aforementioned random access method.
- the network device provided by the embodiment of the present application includes a processor and a memory.
- the memory is used to store a computer program
- the processor is used to call and run the computer program stored in the memory to execute the aforementioned random access method.
- the chip provided in the embodiment of the present application is used to implement the aforementioned random access method.
- the chip includes: a processor, configured to call and run a computer program from the memory, so that the device installed with the chip executes the random access method described above.
- the computer-readable storage medium provided by the embodiment of the present application is used to store a computer program, and the computer program enables a computer to execute the random access method described above.
- the computer program product provided by the embodiment of the present application includes computer program instructions, and the computer program instructions cause the computer to execute the random access method described above.
- the computer program provided in the embodiment of the present application when it runs on a computer, causes the computer to execute the above-mentioned random access method.
- the random access response carries indication information for indicating the random access channel associated with the random access response, so that the terminal can determine whether the random access response received by itself is its own random access response , Which reduces the probability of random access collisions.
- the length of the random access response window can be extended, thereby increasing the probability of the terminal successfully receiving the random access response.
- FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of this application.
- Figure 2 is a flowchart of a competitive random access process provided by an embodiment of the application
- FIG. 3 is a schematic flow chart 1 of a random access method provided by an embodiment of the application.
- Figure 4-1 is a structural diagram of MAC PDU provided by an embodiment of this application.
- Figure 4-2 is a structural diagram of the E/T/R/R/BI subheader provided by an embodiment of this application;
- FIG. 4-3 is a structural diagram of the E/T/RAPID subheader provided by an embodiment of this application.
- FIG. 4-4 is a structural diagram of MAC RAR provided by an embodiment of this application.
- Figure 5 is a diagram of an application example provided by an embodiment of the application.
- FIG. 6 is a schematic diagram 1 of the structural composition of a random access device provided by an embodiment of this application.
- FIG. 7 is a second schematic diagram of the structural composition of a random access device provided by an embodiment of this application.
- FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of this application.
- FIG. 9 is a schematic structural diagram of a chip according to an embodiment of the application.
- FIG. 10 is a schematic block diagram of a communication system provided by an embodiment of this application.
- GSM Global System of Mobile Communication
- CDMA Code Division Multiple Access
- WCDMA Wideband Code Division Multiple Access
- GSM Global System of Mobile Communication
- GPRS General Packet Radio Service
- LTE Long Term Evolution
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- UMTS Universal Mobile Telecommunication System
- WiMAX Worldwide Interoperability for Microwave Access
- the communication system 100 applied in the embodiment of the present application is shown in FIG. 1.
- the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal 120 (or called a communication terminal or a terminal).
- the network device 110 may provide communication coverage for a specific geographic area, and may communicate with terminals located in the coverage area.
- the network device 110 may be a base station (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station in an LTE system (Evolutional Node B, eNB or eNodeB), or the wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolution of the Public Land Mobile Network (PLMN), etc.
- BTS Base Transceiver Station
- NodeB, NB base station
- LTE Long Term Evolutional Node B
- eNB evolved base station
- CRAN Cloud Radio Access Network
- the network equipment can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, Wearable devices, hubs, switches
- the communication system 100 also includes at least one terminal 120 located within the coverage area of the network device 110.
- the "terminal” used here includes, but is not limited to, connection via wired lines, such as public switched telephone networks (PSTN), digital subscriber lines (Digital Subscriber Line, DSL), digital cables, and direct cable connections; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM-FM Broadcast transmitter; and/or another terminal's device configured to receive/send communication signals; and/or Internet of Things (IoT) equipment.
- a terminal set to communicate through a wireless interface may be referred to as a "wireless communication terminal", a “wireless terminal” or a “mobile terminal”.
- mobile terminals include, but are not limited to, satellites or cellular phones; Personal Communications System (PCS) terminals that can combine cellular radio phones with data processing, fax, and data communication capabilities; can include radio phones, pagers, Internet/intranet PDA with internet access, web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palmtop receivers or others including radio phone transceivers Electronic device.
- PCS Personal Communications System
- GPS Global Positioning System
- Terminal can refer to access terminal, user equipment (User Equipment, UE), user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user Device.
- the access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital processing (Personal Digital Assistant, PDA), with wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminals in 5G networks, or terminals in the future evolution of PLMN, etc.
- SIP Session Initiation Protocol
- WLL Wireless Local Loop
- PDA Personal Digital Assistant
- the terminals 120 may perform device-to-device (D2D) communication.
- D2D device-to-device
- the 5G system or 5G network may also be referred to as a New Radio (NR) system or NR network.
- NR New Radio
- FIG. 1 exemplarily shows one network device and two terminals.
- the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminals. This embodiment of the present application There is no restriction on this.
- the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
- network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
- the devices with communication functions in the network/system in the embodiments of the present application may be referred to as communication devices.
- the communication device may include a network device 110 and a terminal 120 with communication functions, and the network device 110 and the terminal 120 may be the specific devices described above, which will not be repeated here;
- the device may also include other devices in the communication system 100, such as other network entities such as a network controller and a mobility management entity, which are not limited in the embodiment of the present application.
- NR works in unlicensed frequency bands, including the following work scenarios:
- Carrier aggregation scenario The primary cell (Primary Cell, PCell) is a licensed spectrum, and the secondary cells (SCell) working on the unlicensed spectrum are aggregated through carrier aggregation.
- Primary Cell Primary Cell
- SCell secondary cells
- PCell is an LTE licensed spectrum
- primary and secondary cell Primary Secondary cell, PScell
- PScell Primary Secondary cell
- NR works as an independent cell in an unlicensed spectrum.
- NR-U New Radio Unlicensed
- 5GHz unlicensed spectrum and 6GHz unlicensed spectrum on unlicensed spectrum, NR-U design should ensure that Fairness between systems working on these unlicensed spectrum.
- the principle of fairness is that the impact of NR-U on systems that have been deployed on unlicensed spectrum cannot exceed the impact between these systems.
- the general energy detection mechanism is the Listen Before Talk (LBT) mechanism.
- LBT Listen Before Talk
- the basic principle of this mechanism is that the base station or terminal (transmitting end) needs to listen for a period of time before transmitting data on the unlicensed spectrum. . If the result of the listening indicates that the channel is idle, the transmitting end can transmit data to the receiving end. If the listening result indicates that the channel is in an occupied state, the transmitting end needs to back off for a period of time according to regulations before continuing to listen to the channel, knowing that the channel listening result is in an idle state, before transmitting data to the receiving end.
- LBT Listen Before Talk
- the base station For downlink data transmission, the base station needs to perform LBT on the unlicensed frequency band; in LAA, the priority of channel access is determined by the following Table 1:
- Mp is related to the listening channel time for channel access.
- CWmin, p and CWmax, p are related to the random listening channel time during channel access. Specifically, when the base station listens to the channel for Td time and is idle, it needs to listen to the channel again N times, each with a duration of 9 us. Where N is a random number from 0 to CWp, and CW min,p ⁇ CW p ⁇ CW max,p .
- Tmcot p is the longest time for the base station to occupy the channel after it has seized the channel. It is related to the channel priority adopted by the base station. For example, if the priority is 1, the channel will be occupied for 2ms at most after the channel is successfully monitored.
- the base station needs to transmit data to the UE within the MCOT time. If the base station does not seize the channel, that is, outside the MCOT time, the UE will not receive the scheduling data from the base station to the UE.
- Random access is an important process for the UE to establish a wireless connection with the network side. Through random access, it can obtain uplink synchronization with the base station and apply for uplink resources.
- the random access process is divided into competitive random access and non-competitive random access.
- Figure 2 shows the flow of a competitive random access process. As shown in Figure 2, the competitive random access process includes the following steps:
- Step 201 The terminal sends msg1 to the base station.
- the terminal sending msg1 to the base station can be specifically implemented through the following process:
- the terminal determines the relationship between the synchronization signal block (Synchronization Signal Block, SSB) and the PRACH resource (configured by the higher layer);
- SSB Synchronization Signal Block
- the terminal receives a set of SSBs and determines its Reference Signal Received Power (RSRP) value, and selects the appropriate SSB according to the threshold;
- RSRP Reference Signal Received Power
- the terminal determines the PRACH resource based on the selected SSB and the corresponding relationship between the SSB and the RACH resource;
- the terminal selects the preamble group according to the size of msg3, and further selects the preamble;
- the terminal sets the target received power of the preamble
- the terminal sends the preamble on the PRACH time-frequency domain resources.
- Step 202 The terminal receives msg2 sent by the base station.
- the terminal receiving the msg2 sent by the base station can be specifically implemented through the following process:
- the terminal determines the random access radio network temporary identifier (RA-RNTI) according to the time-frequency domain resources of the PRACH sent by msg1;
- RA-RNTI random access radio network temporary identifier
- the terminal starts the RAR window (ra-Response Window) at the first physical downlink control channel (Physical Downlink Control Channel, PDCCH) after the preamble is sent, and monitors the PDCCH during the operation of the window to receive the corresponding RA -RNTI's RAR;
- RAR window (ra-Response Window) at the first physical downlink control channel (Physical Downlink Control Channel, PDCCH) after the preamble is sent, and monitors the PDCCH during the operation of the window to receive the corresponding RA -RNTI's RAR;
- PDCCH Physical Downlink Control Channel
- the terminal will retransmit msg1;
- the terminal transmits msg3 according to the RAR's instructions.
- Step 203 The terminal sends msg3 to the base station.
- the terminal sending msg3 to the base station can be specifically implemented through the following process:
- the terminal transmits msg3 based on the uplink scheduling (UL Grant) in RAR;
- start ra-ContentionResolutionTimer After Msg3 is transmitted, start ra-ContentionResolutionTimer and monitor the PDCCH during the running of the timer; when Msg3 retransmits, restart the timer; until the timer expires or stops, the terminal will always monitor the PDCCH.
- Step 204 The terminal receives msg4 sent by the base station.
- the terminal receives the DCI format 1_0 of the Cell-Radio Network Temporary Identifier (C-RNTI) scrambling code and its corresponding PDSCH, random access is complete; if the terminal receives the temporary cell radio network temporary identifier (Temporary Cell-Radio Network Temporary Identifier, TC-RNTI) scrambling DCI format 1_0 and its corresponding PDSCH, and the content is successfully compared, and random access is completed.
- C-RNTI Cell-Radio Network Temporary Identifier
- Fig. 3 is a schematic diagram 1 of the flow of the random access method provided by an embodiment of the application. As shown in Fig. 3, the random access method includes the following steps:
- Step 301 The base station sends at least one random access response in the first window; wherein the random access response carries first information, and the first information is used to indicate the random access channel associated with the random access response.
- the technical solutions of the embodiments of the present application can be applied to any type of random access process, such as a competitive random access process (as shown in FIG. 2) or a non-competitive random access process.
- a competitive random access process as shown in FIG. 2
- a non-competitive random access process does not need to resolve the random access conflict (the network side is pre-configured with random access resources without conflict). Therefore, the non-competitive random access process
- the incoming process only includes two steps: msg1 transmission and mgs2 transmission. Among them, msg1 transmission refers to the terminal sending a preamble on the PRACH, and msg2 transmission refers to the base station sending RAR.
- the base stations mentioned in the embodiments of this application include but are not limited to LTE base stations (eNB) and NR base stations (gNB.)
- the terminal mentioned in the embodiments of this application may be any device capable of communicating with the network, such as a mobile phone, a notebook, a tablet computer, a vehicle-mounted terminal, and a wearable terminal.
- the first window refers to the RAR window for detecting random access responses.
- the length of the first window is between 10 ms and 20 ms. It should be noted that if the first window is less than 10ms, the RA-RNTI calculated based on the PRACH resource does not have repetitions; if the first window is greater than 10ms, the RA-RNTI calculated based on the PRACH resource has repetitions.
- the base station before the base station sends at least one random access response in the first window, the base station further includes the following steps: the base station receives the preamble sent by the first terminal on the first random access channel, and receives The preamble sent on the second random access channel; the base station calculates the first RA-RNTI based on the resources of the first random access channel, and calculates the second RA-RNTI based on the resources of the second random access channel .
- the base station When the first RA-RNTI and the second RA-RNTI are the same, the base station multiplexes the first random access response of the first terminal and the second random access response of the terminal in MAC PDU; wherein, the first information carried in the first random access response is used to indicate that the first random access response is associated with the first random access channel, and the second random access response The first information carried is used to indicate that the second random access response is associated with the second random access channel.
- the transmission time of the first random access channel is earlier than the transmission time of the second random access channel
- the transmission time of the second random access channel is earlier than the transmission time of the MAC PDU.
- the transmission time of the first random access channel is farther from the transmission time of the MAC PDU than the transmission time of the second random access channel.
- UE1 sends a preamble on PRACH-1 (assumed to correspond to time t1)
- UE2 sends a preamble on PRACH-2 (assumed to correspond to time t2)
- the base station successfully seizes the channel at time t3.
- the time t1 is within 10ms of the window
- the time t2 corresponding to PRACH-2 is 10ms outside the window.
- the RA-RNTI of PRACH-1 and the RA-RNTI of PRACH-2 may be the same.
- the base station will multiplex the RAR1 of UE1 and RAR2 of UE2 in the same MAC PDU for transmission, that is, send msg2.
- the first information carried by RAR1 is used to indicate that RAR1 is associated with PRACH-1
- the first information carried by RAR2 is used to indicate that RAR2 is associated with PRACH-2.
- the first subheader in the MAC PDU includes back-off indication information and second information, and the second information is used to indicate the random access channel associated with the back-off indication information.
- the MAC PDU is the MAC PDU of the RAR sent by the network device.
- the data format of the RAR MAC PDU is shown in Figure 4-1.
- the MAC PDU includes multiple MAC subPDUs (MAC subPDU), namely MAC subPDU1, MAC subPDU2, MAC subPDU3 and so on.
- MAC subPDU1 includes backoff indication (Backoff Indication, BI)
- MAC subPDU1 includes E/T/R/R/BI subheader (this application is recorded as the first subheader), E/T/R/R/BI subheader
- BI Backoff Indication
- MAC subPDU2 includes Random Access preamble ID (RAPID), MAC subPDU2 includes E/T/RAPID subheader (this application is referred to as the second subheader), the structure of E/T/RAPID subheader is shown in Figure 4 3 shown.
- the remaining MAC subPDUs include RAPID and RAR. Take MAC subPDU3 as an example.
- MAC subPDU3 includes E/T/RAPID subheader and MAC RAR.
- the structure of E/T/RAPID subheader is shown in Figure 4-3.
- MAC RAR The structure is shown in Figure 4-4. The description of each information in Figure 4-2 to Figure 4-4 is as follows:
- fallback indication information used for the terminal to perform random access fallback according to the fallback indication information.
- RAPID The preamble index (preamble index) obtained by the base station when detecting the preamble, namely RAPID.
- R stands for reserved bit area.
- TAC Timing Advance Command, which carries the TA value used to notify the terminal to perform uplink synchronization.
- Uplink Grant used to indicate resources for uplink transmission of Msg3.
- TC-RNTI used for the terminal to subsequently scramble the sent Msg3 message.
- the R bit in the MAC RAR shown in FIG. 4-4 is used to carry first information, and the first information is used to indicate the random access channel associated with the first random access response.
- the value of the first information carried in the first random access response is a second value, and the second value is used to indicate that the first random access response is associated with the first random access channel
- the value of the first information carried in the second random access response is a first value, and the first value is used to indicate that the second random access response is associated with the second random access channel.
- the first value and the second value are represented by the value range ⁇ 1,0 ⁇ of the R bit. In an example, the first value is 0 and the second value is 1, and vice versa.
- the R bit in the E/T/R/R/BI subheader (denoted as the first subheader in this application) shown in Figure 4-2 is used to carry the second information, and the second information is used for Indicate the random access channel associated with the fallback indication information.
- one of the R bits of the E/T/R/R/BI subheader may be used to carry the second information, the value of the second information is the second value, and the first A two value is used to indicate that the backoff indication information is associated with the first random access channel; or, the value of the second information is a first value, and the first value is used to indicate the backoff indication information Associate the second random access channel.
- the first value and the second value are represented by the value range ⁇ 1,0 ⁇ of the R bit. In an example, the first value is 0 and the second value is 1, and vice versa.
- two R bits of the E/T/R/R/BI subheader may be used to carry the second information, the value of the second information is the second value, and the second value Is used to indicate that the backoff indication information is associated with the first random access channel; or, the value of the second information is a first value, and the first value is used to indicate that the backoff indication information is associated with the first random access channel; The second random access channel; or, the value of the second information is a third value, and the third value is used to indicate that the backoff indication information is associated with the first random access channel and the first random access channel 2. Random access channel; or, the value of the second information is a fourth value, and the fourth value is reserved information.
- the first value, the second value, the third value, and the fourth value are represented by the value range ⁇ 00, 01, 11, 10 ⁇ of the R bit.
- the first value is 00
- the second value is 01
- the third value is 10
- the fourth value is 11.
- Other values are also possible.
- the base station sends the MAC PDU after successfully seizing the channel in the first window of the first terminal; in addition, after the base station fails to seize the channel in the first window of the first terminal, Suspend the first random access response of the first terminal.
- Step 302 The terminal receives a first random access response in a first window, where the first random access response carries first information, and the first information is used to indicate the random access associated with the first random access response channel.
- the terminal receiving the first random access response in the first window is specifically implemented in the following manner:
- the terminal detects the MAC PDU in the first window, and obtains the first random access response corresponding to the first preamble identifier from the MAC PDU, where the first preamble identifier is the preamble sent by the terminal ID of the code. Further, the terminal obtains a first subheader from the MAC PDU, the first subheader includes backoff indication information and second information, and the second information is used to indicate the random number associated with the backoff indication information. Access channel.
- the length of the first window is greater than 10 ms.
- the first window can be divided into two ranges, a first time range and a second time range.
- the first time range of the first window refers to the first time range.
- the second time range of the first window refers to a time range other than the first 10 ms of the first window.
- the first value is 0 and the second value is 1, and vice versa.
- the first processing method (using one of the R bits of the E/T/R/R/BI subheader to carry the second information): if the value of the second information is the first value, the terminal Perform random access fallback according to the fallback indication information; if the value of the second information is the second value, the terminal does not perform random access fallback.
- the first value is 0 and the second value is 1, and vice versa.
- the second processing method (using two R bits of the E/T/R/R/BI subheader to carry the second information): if the value of the second information is the first value or the third value, The terminal performs random access fallback according to the fallback indication information; if the value of the second information is the second value or the fourth value, the terminal does not perform random access fallback.
- the first value is 00
- the second value is 01
- the third value is 10
- the fourth value is 11.
- Other values are also possible.
- the first value is 0 and the second value is 1, and vice versa.
- the first processing method (using one of the R bits of the E/T/R/R/BI subheader to carry the second information): if the value of the second information is the second value, the terminal Perform random access fallback according to the fallback indication information; if the value of the second information is the first value, the terminal does not perform random access fallback.
- the first value is 0 and the second value is 1, and vice versa.
- the second processing method (using two R bits of the E/T/R/R/BI subheader to carry the second information): if the value of the second information is the second value or the third value, The terminal performs random access fallback according to the fallback indication information; if the value of the second information is the first value or the fourth value, the terminal does not perform random access fallback.
- the first value is 00
- the second value is 01
- the third value is 10
- the fourth value is 11.
- Other values are also possible.
- the maximum window length of RAR is 20ms, and the window length of RAR configured for UE1 in Figure 5 is 20ms.
- UE1 sends msg1 (ie preamble) on PRACH-1, the RA-RNTI calculated based on PRACH-1 resources is a;
- UE2 sends msg1 (ie preamble) on PRACH-2, and RA-RNTI calculated based on PRACH-2 resources is a.
- msg2 contains RARs of different PRACH resources corresponding to the same RA-RNTI, where RAR1 represents the RAR associated with PRACH-1, and RAR2 represents the RAR associated with PRACH-2.
- the base station carries first information through R bits of RAR1 and RAR2, and the first information is used to indicate the random access channel associated with the first random access response.
- the value of the R bit is 1 indicates that the corresponding RAR is the feedback of the preamble detected by the PRACH-1 corresponding to the RA-RNTI
- the value of the R bit is 0 indicates that the corresponding RAR is the preamble detected by the PRACH-2 corresponding to the RA-RNTI. feedback of.
- the base station will also set the E/T/R/R/BI subheader of the MAC PDU.
- the R bit in the E/T/R/R/BI subheader carries the second information, and the second information is used to indicate the The random access channel associated with the fallback indication information, that is, the second information is used to set whether the BI is a fallback for the PRACH-1 resource corresponding to the same RA-RNTI or the fallback for the PRACH-2 resource. For example: use one of the R bits of E/T/R/R/BI subheader to indicate the fallback indication of one of the PRACH resources.
- the opposite is also possible.
- the base station For UE1, if the base station does not grab a channel within the RAR window of UE1, the base station discards the RAR of UE1. The RAR of UE2 is not sent, and the transmission of RAR of UE2 is suspended.
- the UE receives msg2 (that is, the MAC PDU of the RAR), obtains the RAR corresponding to the RAPID of the preamble sent by the UE, and then determines whether the RAR is a response to the RAR based on the value of the R bit in the RAR. If the UE receives the RAR within 10ms, the UE first looks for the RAPID corresponding to the RAPID in the MAC PDU according to the RAPID sent by the preamble, and if so, further judges the R bit in the RAR. If the R bit is set to 0, the corresponding RAR is considered to be its own RAR, otherwise the RAR is discarded.
- msg2 that is, the MAC PDU of the RAR
- the UE If the RAR corresponding to the RAPID is not found, it is considered that there is no RAR of its own. If the UE receives the RAR in a time greater than 10ms, the UE first searches the MAC PDU according to the RAPID corresponding to the preamble sent by the UE to see if there is a RAR corresponding to the RAPID in the MAC PDU. If it exists, then further judge the R bit in the RAR. If the R bit is set If it is 1, it is considered that the corresponding RAR is its own RAR, otherwise the RAR is discarded. If the RAR corresponding to the RAPID is not found, it is considered that there is no RAR of its own.
- the UE will determine whether to perform random access fallback. For the case where one R bit in the E/T/R/R/BI subheader indicates the fallback indication of one of the PRACH resources, if the UE receives RAR within 10ms, if the R bit is set to 0, the UE executes according to BI Random access rollback, otherwise it will not be executed. If the UE receives the RAR in a time greater than 10ms, if the R bit is set to 1, the UE performs random access fallback according to the BI, otherwise it does not perform it.
- the UE receives RAR within 10ms, if the two R bits are set to 00 Or 10, the UE executes random access fallback according to BI, otherwise it does not execute. If the UE receives the RAR in a time greater than 10 ms, if the two R bits are set to 01 or 10, the UE performs random access fallback according to the BI, otherwise it does not perform it.
- the UE finds its own RAR, the UE sends msg3 according to the scheduling of the RAR; if the UE does not find the RAR, it detects BI to determine whether to perform random access fallback, and initiates random access again.
- the technical solution of the embodiment of this application expands the window length of the RAR, and indicates the PRACH associated with the RAR through the R bit in the MAC RAR, and at the same time, through one or two R bits in the E/T/R/R/BI subheader Indicates the PRACH associated with the BI.
- FIG. 6 is a schematic diagram 1 of the structural composition of a random access device provided by an embodiment of this application. As shown in FIG. 6, the random access device includes:
- the receiving unit 601 is configured to receive a first random access response in a first window, where the first random access response carries first information, and the first information is used to indicate the random access associated with the first random access response. Access channel.
- the receiving unit 601 is configured to detect a MAC PDU in the first window, and obtain a first random access response corresponding to a first preamble identifier from the MAC PDU, wherein the first random access response is A preamble identifier is the identifier of the preamble sent by the terminal.
- the device further includes a processing unit 602; when the receiving unit 601 detects the MAC PDU in the first time range of the first window:
- the processing unit 602 determines that the first random access response is a response to the random access response of the terminal;
- the processing unit 602 discards the first random access response.
- the device further includes a processing unit 602; when the receiving unit 601 detects the MAC PDU in the second time range of the first window:
- the processing unit 602 determines that the first random access response is a response to the random access response of the terminal;
- the processing unit 602 discards the first random access response.
- the receiving unit 601 is further configured to obtain a first subheader from the MAC PDU, where the first subheader includes backoff indication information and second information, and the second information is used for Indicate the random access channel associated with the fallback indication information.
- the device further includes a processing unit 602; when the receiving unit 601 detects the MAC PDU in the first time range of the first window:
- the processing unit 602 performs random access fallback according to the fallback indication information
- the processing unit 602 does not perform random access fallback.
- the device further includes a processing unit 602; when the receiving unit 601 detects the MAC PDU in the second time range of the first window:
- the processing unit 602 performs random access fallback according to the fallback indication information
- the processing unit 602 does not perform random access fallback.
- the device further includes a processing unit 602; when the receiving unit 601 detects the MAC PDU in the first time range of the first window:
- the processing unit 602 performs random access fallback according to the fallback indication information
- the processing unit 602 does not perform random access fallback.
- the device further includes a processing unit 602; when the receiving unit 601 detects the MAC PDU in the second time range of the first window:
- the processing unit 602 performs random access fallback according to the fallback indication information
- the processing unit 602 does not perform random access fallback.
- the first time range of the first window refers to a time range within the first 10 ms of the first window.
- the second time range of the first window refers to a time range other than the first 10 ms of the first window.
- FIG. 7 is a second schematic diagram of the structural composition of the random access device provided by an embodiment of the application. As shown in FIG. 7, the random access device includes:
- the sending unit 701 is configured to send at least one random access response in a first window; wherein the random access response carries first information, and the first information is used to indicate the random access channel associated with the random access response .
- the device further includes:
- the receiving unit 702 is configured to receive the preamble sent by the first terminal on the first random access channel, and receive the preamble sent by the second terminal on the second random access channel;
- the processing unit 703 is configured to calculate a first RA-RNTI based on the resources of the first random access channel, and calculate a second RA-RNTI based on the resources of the second random access channel;
- the sending unit 701 is configured to connect the first random access response of the first terminal with the second random access response of the terminal when the first RA-RNTI and the second RA-RNTI are the same.
- the incoming response is multiplexed in the MAC PDU for transmission; wherein the first information carried in the first random access response is used to indicate that the first random access response is associated with the first random access channel, so The first information carried in the second random access response is used to indicate that the second random access response is associated with the second random access channel; wherein, the transmission time of the first random access channel is earlier than the The transmission time of the second random access channel, the transmission time of the second random access channel is earlier than the transmission time of the MAC PDU.
- the value of the first information carried in the first random access response is a second value, and the second value is used to indicate that the first random access response is associated with the first random access response.
- the value of the first information carried in the second random access response is a first value, and the first value is used to indicate that the second random access response is associated with the second random access channel.
- the first subheader in the MAC PDU includes back-off indication information and second information, and the second information is used to indicate the random access channel associated with the back-off indication information.
- the value of the second information is a second value, and the second value is used to indicate that the backoff indication information is associated with the first random access channel; or,
- the value of the second information is a first value, and the first value is used to indicate that the backoff indication information is associated with the second random access channel.
- the value of the second information is a second value, and the second value is used to indicate that the backoff indication information is associated with the first random access channel; or,
- the value of the second information is a first value, and the first value is used to indicate that the backoff indication information is associated with the second random access channel; or,
- the value of the second information is a third value, and the third value is used to indicate that the backoff indication information is associated with the first random access channel and the second random access channel; or,
- the value of the second information is a fourth value, and the fourth value is reserved information.
- the sending unit 701 is configured to send the MAC PDU after successfully seizing the channel in the first window of the first terminal; the device further includes:
- the processing unit is configured to suspend the first random access response of the first terminal after the channel preemption fails in the first window of the first terminal.
- FIG. 8 is a schematic structural diagram of a communication device 600 provided by an embodiment of the present application.
- the communication device may be a terminal or a network device.
- the communication device 600 shown in FIG. 8 includes a processor 610, and the processor 610 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
- the communication device 600 may further include a memory 620.
- the processor 610 may call and run a computer program from the memory 620 to implement the method in the embodiment of the present application.
- the memory 620 may be a separate device independent of the processor 610, or may be integrated in the processor 610.
- the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.
- the transceiver 630 may include a transmitter and a receiver.
- the transceiver 630 may further include an antenna, and the number of antennas may be one or more.
- the communication device 600 may specifically be a network device in an embodiment of the present application, and the communication device 600 may implement the corresponding process implemented by the network device in each method of the embodiment of the present application. For brevity, details are not repeated here. .
- the communication device 600 may specifically be a mobile terminal/terminal according to an embodiment of the application, and the communication device 600 may implement the corresponding procedures implemented by the mobile terminal/terminal in each method of the embodiments of the application. For the sake of brevity, This will not be repeated here.
- FIG. 9 is a schematic structural diagram of a chip of an embodiment of the present application.
- the chip 700 shown in FIG. 9 includes a processor 710, and the processor 710 can call and run a computer program from the memory to implement the method in the embodiment of the present application.
- the chip 700 may further include a memory 720.
- the processor 710 may call and run a computer program from the memory 720 to implement the method in the embodiment of the present application.
- the memory 720 may be a separate device independent of the processor 710, or may be integrated in the processor 710.
- the chip 700 may further include an input interface 730.
- the processor 710 may control the input interface 730 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.
- the chip 700 may further include an output interface 740.
- the processor 710 can control the output interface 740 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.
- the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding process implemented by the network device in the various methods of the embodiment of the present application.
- the chip can implement the corresponding process implemented by the network device in the various methods of the embodiment of the present application.
- the chip can be applied to the mobile terminal/terminal in the embodiment of the present application, and the chip can implement the corresponding process implemented by the mobile terminal/terminal in each method of the embodiment of the present application.
- the chip can implement the corresponding process implemented by the mobile terminal/terminal in each method of the embodiment of the present application.
- it will not be omitted here. Repeat.
- the chip mentioned in the embodiment of the present application may also be referred to as a system-level chip, a system-on-chip, a system-on-chip, or a system-on-chip.
- FIG. 10 is a schematic block diagram of a communication system 900 according to an embodiment of the present application. As shown in FIG. 10, the communication system 900 includes a terminal 910 and a network device 920.
- the terminal 910 may be used to implement the corresponding functions implemented by the terminal in the foregoing method
- the network device 920 may be used to implement the corresponding functions implemented by the network device in the foregoing method.
- details are not described herein again.
- the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capability.
- the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
- the aforementioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
- DSP Digital Signal Processor
- ASIC application specific integrated circuit
- FPGA ready-made programmable gate array
- the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
- the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
- the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
- the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers.
- the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
- the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
- the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
- the volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache.
- RAM random access memory
- SRAM static random access memory
- DRAM dynamic random access memory
- DRAM synchronous dynamic random access memory
- SDRAM double data rate synchronous dynamic random access memory
- Double Data Rate SDRAM DDR SDRAM
- ESDRAM enhanced synchronous dynamic random access memory
- Synchlink DRAM SLDRAM
- DR RAM Direct Rambus RAM
- the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiment of the present application is intended to include but not limited to these and any other suitable types of memory.
- the embodiment of the present application also provides a computer-readable storage medium for storing computer programs.
- the computer-readable storage medium may be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
- the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
- the computer-readable storage medium may be applied to the mobile terminal/terminal in the embodiments of the present application, and the computer program causes the computer to execute the corresponding processes implemented by the mobile terminal/terminal in the various methods of the embodiments of the present application, for It’s concise and will not be repeated here.
- the embodiments of the present application also provide a computer program product, including computer program instructions.
- the computer program product may be applied to the network device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
- the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
- the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
- the computer program product can be applied to the mobile terminal/terminal in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding procedures implemented by the mobile terminal/terminal in the various methods of the embodiments of the present application, for the sake of brevity , I won’t repeat it here.
- the embodiment of the present application also provides a computer program.
- the computer program can be applied to the network device in the embodiment of the present application.
- the computer program runs on the computer, the computer is caused to execute the corresponding process implemented by the network device in each method of the embodiment of the present application.
- I won’t repeat it here.
- the computer program can be applied to the mobile terminal/terminal in the embodiments of the present application.
- the computer program runs on the computer, the computer can execute the corresponding methods implemented by the mobile terminal/terminal in the various methods of the embodiments of the present application. For the sake of brevity, the process will not be repeated here.
- the disclosed system, device, and method may be implemented in other ways.
- the device embodiments described above are only illustrative.
- the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented.
- the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
- each unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
- the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
- the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application.
- the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .
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Abstract
本申请实施例提供一种随机接入方法及装置、终端、网络设备,所述方法包括:终端在第一窗口接收第一随机接入响应,所述第一随机接入响应携带第一信息,所述第一信息用于指示所述第一随机接入响应关联的随机接入信道。
Description
本申请实施例涉及移动通信技术领域,具体涉及一种随机接入方法及装置、终端、网络设备。
在随机接入过程中,终端发送msg1后,会开启一个窗口(window),终端在这个窗口内检测随机接入响应(Random Access Response,RAR)。目前RAR的最大窗口为10ms,为了提高终端成功接收RAR的概率,可以延长RAR的最大窗口超过10ms,这会导致在不同物理随机接入信道(Physical Random Access Channel,PRACH)资源发送msg1的不同终端能够盲检到同一个RAR,这样会增加冲突的概率。
发明内容
本申请实施例提供一种随机接入方法及装置、终端、网络设备。
本申请实施例提供的随机接入方法,包括:
终端在第一窗口接收第一随机接入响应,所述第一随机接入响应携带第一信息,所述第一信息用于指示所述第一随机接入响应关联的随机接入信道。
本申请实施例提供的随机接入方法,包括:
基站在第一窗口发送至少一个随机接入响应;其中,所述随机接入响应携带第一信息,所述第一信息用于指示该随机接入响应关联的随机接入信道。
本申请实施例提供的随机接入装置,包括:
接收单元,用于在第一窗口接收第一随机接入响应,所述第一随机接入响应携带第一信息,所述第一信息用于指示所述第一随机接入响应关联的随机接入信道。
本申请实施例提供的随机接入装置,包括:
发送单元,用于在第一窗口发送至少一个随机接入响应;其中,所述随机接入响应携带第一信息,所述第一信息用于指示该随机接入响应关联的随机接入信道。
本申请实施例提供的终端,包括处理器和存储器。该存储器用于存储计算机程序,该处理器用于调用并运行该存储器中存储的计算机程序,执行上述的随机接入方法。
本申请实施例提供的网络设备,包括处理器和存储器。该存储器用于存储计算机程序,该处理器用于调用并运行该存储器中存储的计算机程序,执行上述的随机接入方法。
本申请实施例提供的芯片,用于实现上述的随机接入方法。
具体地,该芯片包括:处理器,用于从存储器中调用并运行计算机程序,使得安装有该芯片的设备执行上述的随机接入方法。
本申请实施例提供的计算机可读存储介质,用于存储计算机程序,该计算机程序使得计算机执行上述的随机接入方法。
本申请实施例提供的计算机程序产品,包括计算机程序指令,该计算机程序指令 使得计算机执行上述的随机接入方法。
本申请实施例提供的计算机程序,当其在计算机上运行时,使得计算机执行上述的随机接入方法。
通过上述技术方案,随机接入响应中携带用于指示该随机接入响应关联的随机接入信道的指示信息,从而使得终端可以明确自己接收到的随机接入响应是不是自己的随机接入响应,降低了随机接入冲突的概率。另一方面,随机接入响应的窗口长度可以延长,从而提高了终端成功接收随机接入响应的概率。
此处所说明的附图用来提供对本申请的进一步理解,构成本申请的一部分,本申请的示意性实施例及其说明用于解释本申请,并不构成对本申请的不当限定。在附图中:
图1为本申请实施例提供的一种通信***架构的示意性图;
图2为本申请实施例提供的一种竞争随机接入过程的流程图;
图3为本申请实施例提供的随机接入方法的流程示意图一;
图4-1为本申请实施例提供的MAC PDU的结构图;
图4-2为本申请实施例提供的E/T/R/R/BI subheader的结构图;
图4-3为本申请实施例提供的E/T/RAPID subheader的结构图;
图4-4为本申请实施例提供的MAC RAR的结构图;
图5为本申请实施例提供的应用示例图;
图6为本申请实施例提供的随机接入装置的结构组成示意图一;
图7为本申请实施例提供的随机接入装置的结构组成示意图二;
图8为本申请实施例提供的一种通信设备示意性结构图;
图9为本申请实施例的芯片的示意性结构图;
图10为本申请实施例提供的一种通信***的示意性框图。
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
本申请实施例的技术方案可以应用于各种通信***,例如:全球移动通讯(Global System of Mobile communication,GSM)***、码分多址(Code Division Multiple Access,CDMA)***、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)***、通用分组无线业务(General Packet Radio Service,GPRS)、长期演进(Long Term Evolution,LTE)***、LTE频分双工(Frequency Division Duplex,FDD)***、LTE时分双工(Time Division Duplex,TDD)、通用移动通信***(Universal Mobile Telecommunication System,UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access,WiMAX)通信***或5G***等。
示例性的,本申请实施例应用的通信***100如图1所示。该通信***100可以包括网络设备110,网络设备110可以是与终端120(或称为通信终端、终端)通信的设备。网络设备110可以为特定的地理区域提供通信覆盖,并且可以与位于该覆盖区域内的终端进行通信。可选地,该网络设备110可以是GSM***或CDMA***中的基站(Base Transceiver Station,BTS),也可以是WCDMA***中的基站(NodeB,NB), 还可以是LTE***中的演进型基站(Evolutional Node B,eNB或eNodeB),或者是云无线接入网络(Cloud Radio Access Network,CRAN)中的无线控制器,或者该网络设备可以为移动交换中心、中继站、接入点、车载设备、可穿戴设备、集线器、交换机、网桥、路由器、5G网络中的网络侧设备或者未来演进的公共陆地移动网络(Public Land Mobile Network,PLMN)中的网络设备等。
该通信***100还包括位于网络设备110覆盖范围内的至少一个终端120。作为在此使用的“终端”包括但不限于经由有线线路连接,如经由公共交换电话网络(Public Switched Telephone Networks,PSTN)、数字用户线路(Digital Subscriber Line,DSL)、数字电缆、直接电缆连接;和/或另一数据连接/网络;和/或经由无线接口,如,针对蜂窝网络、无线局域网(Wireless Local Area Network,WLAN)、诸如DVB-H网络的数字电视网络、卫星网络、AM-FM广播发送器;和/或另一终端的被设置成接收/发送通信信号的装置;和/或物联网(Internet of Things,IoT)设备。被设置成通过无线接口通信的终端可以被称为“无线通信终端”、“无线终端”或“移动终端”。移动终端的示例包括但不限于卫星或蜂窝电话;可以组合蜂窝无线电电话与数据处理、传真以及数据通信能力的个人通信***(Personal Communications System,PCS)终端;可以包括无线电电话、寻呼机、因特网/内联网接入、Web浏览器、记事簿、日历以及/或全球定位***(Global Positioning System,GPS)接收器的PDA;以及常规膝上型和/或掌上型接收器或包括无线电电话收发器的其它电子装置。终端可以指接入终端、用户设备(User Equipment,UE)、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol,SIP)电话、无线本地环路(Wireless Local Loop,WLL)站、个人数字处理(Personal Digital Assistant,PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、5G网络中的终端或者未来演进的PLMN中的终端等。
可选地,终端120之间可以进行终端直连(Device to Device,D2D)通信。
可选地,5G***或5G网络还可以称为新无线(New Radio,NR)***或NR网络。
图1示例性地示出了一个网络设备和两个终端,可选地,该通信***100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端,本申请实施例对此不做限定。
可选地,该通信***100还可以包括网络控制器、移动管理实体等其他网络实体,本申请实施例对此不作限定。
应理解,本申请实施例中网络/***中具有通信功能的设备可称为通信设备。以图1示出的通信***100为例,通信设备可包括具有通信功能的网络设备110和终端120,网络设备110和终端120可以为上文所述的具体设备,此处不再赘述;通信设备还可包括通信***100中的其他设备,例如网络控制器、移动管理实体等其他网络实体,本申请实施例中对此不做限定。
应理解,本文中术语“***”和“网络”在本文中常被可互换使用。本文中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系。
为便于理解本申请实施例的技术方案,以下对本申请实施例相关的技术概念进行说明。
NR工作在非授权频段,包括如下几种工作场景:
1)载波聚合场景:主小区(Primary Cell,PCell)为授权频谱,通过载波聚合方式 聚合工作在非授权频谱上的辅小区(Secondary Cell,SCell)。
2)双连接工作场景:PCell为LTE授权频谱,主辅小区(Primary Secondary cell,PScell)为NR非授权频谱。
3)独立工作场景:NR作为一个独立小区工作在非授权频谱。
一般来说,新无线免授权(New Radio Unlicensed,NR-U)的工作频带(Band)为5GHz非授权频谱和6GHz非授权频谱;在非授权频谱上,NR-U的设计应该保证与其他已经工作在这些非授权频谱上的***之间的公平性。公平性的原则是,NR-U对于已经部署在非授权频谱上的***的影响不能超过这些***之间的影响。
为了保证在非授权频谱上各***之间的公平性共存,能量检测已经被同意作为一个基本的共存机制。一般的能量检测机制为先听后说(Listen Before Talk,LBT)机制,该机制的基本原理为,基站或者终端(传输端)在非授权频谱上传输数据之前,需要先按照规定侦听一段时间。如果侦听的结果表示该信道为空闲状态,则传输端可以给接收端传输数据。如果侦听的结果表示该信道为占用状态,则传输端需要根据规定回退一段时间再继续侦听信道,知道信道侦听结果为空闲状态,才能向接收端传输数据。
对于下行数据传输,在非授权频段上,基站需要执行LBT;在LAA中,信道接入的优先级由如下表1决定:
表1
其中,Mp与执行信道接入的侦听信道时间有关系。具体的,基站需要先执行Td时间的信道侦听,其中Td=16us+Mp×9us。
CWmin,p和CWmax,p与信道接入过程中的随机侦听信道时间有关系。具体的,在基站侦听Td时间信道为空闲时,需要再侦听N次信道,每次时长为9us。其中N为一个从0到CWp之间的随机数,而CW
min,p≤CW
p≤CW
max,p。
Tmcot,p为基站抢占到信道之后,占用信道的最长时间,它与基站采用的信道优先级有关系,比如优先级为1,则信道侦听成功之后,最多占用信道2ms。
综上,对于UE侧来讲,基站给UE传输数据需要在MCOT时间之内,如果基站没有抢占到信道,也就是在MCOT时间之外,UE是不会收到基站给UE的调度数据的。
随机接入是UE与网络侧建立无线连接的重要过程,通过随机接入可以与基站之间取得上行同步,申请上行资源。随机接入过程分为竞争随机接入和非竞争随机接入。图2给出了一种竞争随机接入过程的流程,如图2所示,竞争随机接入过程包括以下步骤:
步骤201:终端向基站发送msg1。
这里,终端向基站发送msg1具体可以通过以下过程来实现:
–终端确定同步信号块(Synchronization Signal Block,SSB)与PRACH资源的关系(由高层配置);
–终端接收一组SSB并确定其参考信号接收功率(Reference Signal Received Power, RSRP)值,根据门限选择合适的SSB;
–终端基于选择的SSB和SSB与RACH资源的对应关系确定PRACH资源;
–终端根据msg3的大小选择前导码组(preamble group),进一步选择前导码;
–终端设置前导码的目标接收功率;
–终端在PRACH时频域资源上发送前导码。
步骤202:终端接收基站发送的msg2。
这里,终端接收基站发送的msg2具体可以通过以下过程来实现:
–终端根据发送msg1的PRACH时频域资源确定随机接入无线网络临时标识(Random Access-Radio Network Temporary Identifier,RA-RNTI);
–终端在发送了前导码之后的第一个物理下行控制信道(Physical Downlink Control Channel,PDCCH)时机(occasion)开启RAR窗口(ra-Response Window)并在该窗口运行期间监听PDCCH,以接收对应RA-RNTI的RAR;
–如果在RAR窗口内没有收到RAR,则终端进行msg1的重传;
–如果在RAR窗口内收到RAR,则终端根据RAR的指示进行msg3的传输。
步骤203:终端向基站发送msg3。
这里,终端向基站发送msg3具体可以通过以下过程来实现:
–终端基于RAR中的上行调度(UL Grant)传输msg3;
–当Msg3传输后,启动ra-ContentionResolutionTimer并在定时器运行期间监听PDCCH;当Msg3进行重传时,重启该定时器;在该定时器超时或停止之前,终端会一直监听PDCCH。
步骤204:终端接收基站发送的msg4。
这里,如果终端收到小区无线网络临时标识(Cell-Radio Network Temporary Identifier,C-RNTI)扰码的DCI format 1_0及其对应的PDSCH,随机接入完成;如果终端收到临时小区无线网络临时标识(Temporary Cell-Radio Network Temporary Identifier,TC-RNTI)扰码的DCI format 1_0及其对应的PDSCH,并比对内容成功,随机接入完成。
在NR-U小区中发起随机接入过程,无论是竞争随机接入还是非竞争随机接入,对于msg2(也就是RAR)的发送,由于信道抢占不成功,所以存在10ms内发送不下来的可能,所以UE在现有的RAR窗口内等不到RAR,本申请实施例的技术方案针对此延长RAR窗口。
延长RAR窗口后,会导致在不同PRACH资源发送msg1的不同终端能够盲检到同一个RAR,这样会增加冲突的概率,为此提出本申请实施例的以下技术方案,需要说明的是,本申请实施例的技术方案不局限于免授权频段(如NR-U的工作频段),同样也可以应用于授权频段。
图3为本申请实施例提供的随机接入方法的流程示意图一,如图3所示,所述随机接入方法包括以下步骤:
步骤301:基站在第一窗口发送至少一个随机接入响应;其中,所述随机接入响应携带第一信息,所述第一信息用于指示该随机接入响应关联的随机接入信道。
本申请实施例的技术方案可以应用于任意类型的随机接入过程,例如竞争随机接入过程(如图2所示)或非竞争随机接入过程。需要说明的是,非竞争随机接入过程相对于竞争随机接入过程而言,由于不需要解决随机接入冲突(网络侧预先配置了没有冲突的随机接入资源),因此,非竞争随机接入过程只包含msg1传输和mgs2传输两个步骤。其中,msg1传输是指终端在PRACH上发送前导码(preamble),msg2传输是指基站发送RAR。
本申请实施例中提到的基站包括但不限于是LTE基站(eNB),NR基站(gNB。)
本申请实施例中提到的终端可以是手机、笔记本、平板电脑、车载终端、可穿戴式终端等任意能够与网络进行通信的设备。
本申请实施例中,所述第一窗口是指检测随机接入响应的RAR窗口。在一种实施方式中,所述第一窗口的长度介于10ms和20ms之间。需要说明的是,如果第一窗口小于10ms,基于PRACH资源计算出的RA-RNTI不存在重复的情况;如果第一窗口大于10ms,基于PRACH资源计算出的RA-RNTI存在重复的情况。
本申请实施例中,基站在第一窗口发送至少一个随机接入响应之前,还包括如下步骤:所述基站接收第一终端在第一随机接入信道上发送的前导码,接收第二终端在第二随机接入信道上发送的前导码;所述基站基于所述第一随机接入信道的资源计算第一RA-RNTI,基于所述第二随机接入信道的资源计算第二RA-RNTI。
所述第一RA-RNTI和所述第二RA-RNTI相同的情况下,所述基站将所述第一终端的第一随机接入响应和所述终端的第二随机接入响应复用在MAC PDU中进行发送;其中,所述第一随机接入响应携带的第一信息用于指示所述第一随机接入响应关联所述第一随机接入信道,所述第二随机接入响应携带的第一信息用于指示所述第二随机接入响应关联所述第二随机接入信道。其中,所述第一随机接入信道的传输时间早于所述第二随机接入信道的传输时间,所述第二随机接入信道的传输时间早于所述MAC PDU的传输时间。
需要说明的是,所述第一随机接入信道的传输时间相对于所述第二随机接入信道的传输时间,距离所述MAC PDU的传输时间更远。如图5所示,UE1在PRACH-1(假设对应t1时刻)上发送preamble,UE2在PRACH-2(假设对应t2时刻)上发送preamble,基站在t3时刻抢占信道成功,由于PRACH-1对应的t1时刻位于窗口的10ms以内,PRACH-2对应的t2时刻位于窗口的10ms以外,PRACH-1的RA-RNTI和PRACH-2的RA-RNTI可能相同,如果PRACH-1和PRACH-2的RA-RNTI相同,基站会将UE1的RAR1和UE2的RAR2复用在同一MAC PDU中进行发送,即发送msg2。其中,RAR1携带的第一信息用于指示RAR1关联PRACH-1,RAR2携带的第一信息用于指示RAR2关联PRACH-2。
进一步,所述MAC PDU中的第一子头包括回退指示信息和第二信息,所述第二信息用于指示所述回退指示信息关联的随机接入信道。
这里,MAC PDU是网络设备发送的RAR的MAC PDU,RAR的MAC PDU的数据格式如图4-1所示,MAC PDU包括多个MAC子PDU(MAC subPDU),分别为MAC subPDU1、MAC subPDU2、MAC subPDU3等等。其中,MAC subPDU1包含回退指示(Backoff Indication,BI),MAC subPDU1包括E/T/R/R/BI subheader(本申请记作第一子头),E/T/R/R/BI subheader的结构如图4-2所示。MAC subPDU2包含随机接入前导码标识(Random Access preamble ID,RAPID),MAC subPDU2包括E/T/RAPID subheader(本申请记作第二子头),E/T/RAPID subheader的结构如图4-3所示。其余MAC subPDU(如MAC subPDU3)包含RAPID和RAR,以MAC subPDU3为例,MAC subPDU3包括E/T/RAPID subheader和MAC RAR,E/T/RAPID subheader的结构如图4-3所示,MAC RAR的结构如图4-4所示。图4-2至图4-4中各个信息的介绍如下:
BI:回退指示信息,用于终端根据所述回退指示信息执行随机接入回退。
RAPID:基站在检测preamble时得到的前导码索引(preamble index),即RAPID。
R:代表保留比特区域。
TAC:时间提前命令(Timing Advance Command),携带用于通知终端进行上行同步的TA值。
UL Grant:上行授权(Uplink Grant),用于指示上行传输Msg3的资源。
TC-RNTI:用于终端后续对发送的Msg3消息进行加扰。
本申请实施例中,利用图4-4所示的MAC RAR中的R比特携带第一信息,所述第一信息用于指示所述第一随机接入响应关联的随机接入信道。具体地,所述第一随机接入响应中携带的第一信息的取值为第二值,所述第二值用于指示所述第一随机接入响应关联所述第一随机接入信道;所述第二随机接入响应中携带的第一信息的取值为第一值,所述第一值用于指示所述第二随机接入响应关联所述第二随机接入信道。这里,通过R比特的取值范围{1,0}来表示第一值和第二值。在一个例子中,第一值为0,第二值为1,反之也可以。
本申请实施例中,利用图4-2所示的E/T/R/R/BI subheader(本申请记作第一子头)中的R比特携带第二信息,所述第二信息用于指示所述回退指示信息关联的随机接入信道。具体地,在一种实施方式中,可以利用E/T/R/R/BI subheader的其中1个R比特来携带第二信息,所述第二信息的取值为第二值,所述第二值用于指示所述回退指示信息关联所述第一随机接入信道;或者,所述第二信息的取值为第一值,所述第一值用于指示所述回退指示信息关联所述第二随机接入信道。这里,通过R比特的取值范围{1,0}来表示第一值和第二值。在一个例子中,第一值为0,第二值为1,反之也可以。
在另一种实施方式中,可以利用E/T/R/R/BI subheader的其中2个R比特来携带第二信息,所述第二信息的取值为第二值,所述第二值用于指示所述回退指示信息关联所述第一随机接入信道;或者,所述第二信息的取值为第一值,所述第一值用于指示所述回退指示信息关联所述第二随机接入信道;或者,所述第二信息的取值为第三值,所述第三值用于指示所述回退指示信息关联所述第一随机接入信道和所述第二随机接入信道;或者,所述第二信息的取值为第四值,所述第四值为预留信息。这里,通过R比特的取值范围{00,01,11,10}来表示第一值、第二值、第三值和第四值。在一个例子中,第一值为00,第二值为01,第三值为10,第四值为11,其他取值方式也可以。
在免授权场景中,所述基站在第一终端的第一窗口内抢占信道成功后,发送所述MAC PDU;此外,所述基站在所述第一终端的第一窗口内抢占信道失败后,悬挂所述第一终端的第一随机接入响应。
步骤302:终端在第一窗口接收第一随机接入响应,所述第一随机接入响应携带第一信息,所述第一信息用于指示所述第一随机接入响应关联的随机接入信道。
本申请实施例中,所述终端在第一窗口接收第一随机接入响应,具体通过以下方式实现:
所述终端在第一窗口检测到MAC PDU,从所述MAC PDU中获取与第一前导码标识对应的第一随机接入响应,其中,所述第一前导码标识是所述终端发送的前导码的标识。进一步,所述终端从所述MAC PDU中获取第一子头,所述第一子头包括回退指示信息和第二信息,所述第二信息用于指示所述回退指示信息关联的随机接入信道。
本申请实施例中,第一窗口的长度大于10ms,第一窗口可以划分成两个范围,第一时间范围和第二时间范围,所述第一窗口的第一时间范围是指所述第一窗口的前10ms以内的时间范围。所述第一窗口的第二时间范围是指所述第一窗口的前10ms以外的时间范围。以下对在不同的时间范围分情况描述:
情况一:所述终端在第一窗口的第一时间范围检测到所述MAC PDU的情况下:
1)对于第一信息的处理:如果所述第一随机接入响应中携带的第一信息的取值为第一值,则所述终端确定所述第一随机接入响应是响应所述终端的随机接入响应; 如果所述第一随机接入响应中携带的第一信息的取值为第二值,则所述终端丢弃所述第一随机接入响应。在一个例子中,第一值为0,第二值为1,反之也可以。
2)对于第二信息的处理:
第一种处理方式(利用E/T/R/R/BI subheader的其中1个R比特来携带第二信息的情况):如果所述第二信息的取值为第一值,则所述终端根据所述回退指示信息执行随机接入回退;如果所述第二信息的取值为第二值,则所述终端不执行随机接入回退。在一个例子中,第一值为0,第二值为1,反之也可以。
第二种处理方式(利用E/T/R/R/BI subheader的其中2个R比特来携带第二信息的情况):如果所述第二信息的取值为第一值或第三值,则所述终端根据所述回退指示信息执行随机接入回退;如果所述第二信息的取值为第二值或第四值,则所述终端不执行随机接入回退。在一个例子中,第一值为00,第二值为01,第三值为10,第四值为11,其他取值方式也可以。
情况二:所述终端在第一窗口的第二时间范围检测到所述MAC PDU的情况下:
1)对于第一信息的处理:如果所述第一随机接入响应中携带的第一信息的取值为第二值,则所述终端确定所述第一随机接入响应是响应所述终端的随机接入响应;如果所述第一随机接入响应中携带的第一信息的取值为第一值,则所述终端丢弃所述第一随机接入响应。在一个例子中,第一值为0,第二值为1,反之也可以。
2)对于第二信息的处理:
第一种处理方式(利用E/T/R/R/BI subheader的其中1个R比特来携带第二信息的情况):如果所述第二信息的取值为第二值,则所述终端根据所述回退指示信息执行随机接入回退;如果所述第二信息的取值为第一值,则所述终端不执行随机接入回退。在一个例子中,第一值为0,第二值为1,反之也可以。
第二种处理方式(利用E/T/R/R/BI subheader的其中2个R比特来携带第二信息的情况):如果所述第二信息的取值为第二值或第三值,则所述终端根据所述回退指示信息执行随机接入回退;如果所述第二信息的取值为第一值或第四值,则所述终端不执行随机接入回退。在一个例子中,第一值为00,第二值为01,第三值为10,第四值为11,其他取值方式也可以。
以下结合图5所示的具体应用示例对本申请实施例的技术方案进行举例说明。
RAR的window最大长度为20ms,图5中针对UE1配置了RAR的window长度为20ms。UE1在PRACH-1发送msg1(即preamble),基于PRACH-1资源计算的RA-RNTI为a;UE2在PRACH-2发送msg1(即preamble),基于PRACH-2资源计算的RA-RNTI为a。
针对UE1,如果基站在UE1的RAR窗口范围内抢到信道,则基站可以将UE1和UE2的RAR复用在一个MAC PDU中下发msg2。此时msg2内包含相同的RA-RNTI对应的不同PRACH资源的RAR,其中,RAR1代表PRACH-1关联的RAR,RAR2代表PRACH-2关联的RAR。基站通过RAR1和RAR2的R比特携带第一信息,所述第一信息用于指示所述第一随机接入响应关联的随机接入信道。例如R比特取值为1表示对应RAR为该RA-RNTI对应的PRACH-1检测到的preamble的反馈,R比特取值为0表示对应RAR为该RA-RNTI对应的PRACH-2检测到的preamble的反馈。此时基站还会设置MAC PDU的E/T/R/R/BI subheader,E/T/R/R/BI subheader中的R比特位携带第二信息,所述第二信息用于指示所述回退指示信息关联的随机接入信道,即所述第二信息用来设置BI是针对相同RA-RNTI对应的PRACH-1资源的回退,还是针对PRACH-2资源的回退。举个例子:利用E/T/R/R/BI subheader其中一个R比特指示其中一个PRACH资源的回退指示,如果设置为1,则表示该BI为针对 RA-RNTI=a的PRACH-1资源发送的回退指示,如果设置为0,则表示该BI为针对RA-RNTI=a的PRACH-2资源发送的回退指示。反之也可以。再举个例子:利用E/T/R/R/BI subheader其中两个R比特指示其中一个或者两个PRACH资源的回退指示,如果设置为00,则表示该BI为针对RA-RNTI=a的PRACH-1资源发送的回退指示,如果设置为01,则表示该BI为针对RA-RNTI=a的PRACH-2资源发送的回退指示,如果设置为10,则表示该BI为针对RA-RNTI=a的PRACH-1资源和PRACH-2资源发送的回退指示,如果设置为11,则表示预留。
针对UE1,如果基站在UE1的RAR窗口范围内没有抢到信道,则基站丢弃该UE1的RAR。不发送UE2的RAR,并悬挂UE2的RAR的发送。
UE接收msg2(即RAR的MAC PDU),获得自己发送的preamble的RAPID对应的RAR,然后基于该RAR中的R比特位的取值确定该RAR是否为响应自己的RAR。如果UE在10ms内接收到RAR,UE首先根据自己发送的preamble对应RAPID查找MAC PDU里面是否存在该RAPID对应的RAR,如果存在,则进一步判断RAR中的R比特位。则如果R比特设置为0,在认为对应的RAR为自己的RAR,否则丢弃该RAR。如果没有找到所述RAPID对应的RAR,则认为没有自己的RAR。如果UE是在大于10ms的时间收到RAR,UE首先根据自己发送的preamble对应RAPID查找MAC PDU里面是否存在该RAPID对应的RAR,如果存在,则进一步判断RAR中的R比特位,如果R比特设置为1,则认为对应的RAR为自己的RAR,否则丢弃该RAR。如果没有找到所述RAPID对应的RAR,则认为没有自己的RAR。进一步,如果MAC PDU中存在BI信息,则UE会判断是否执行随机接入回退。对于E/T/R/R/BI subheader中一个R比特位指示其中一个PRACH资源的回退指示的情况,如果UE在10ms内接收到RAR,则如果R比特为设置为0,UE根据BI执行随机接入回退,否则不执行。如果UE是在大于10ms的时间收到RAR,则如果R比特设置为1,UE根据BI执行随机接入回退,否则不执行。对于E/T/R/R/BI subheader中两个R比特为指示其中一个或者两个PRACH资源的回退指示的情况,如果UE在10ms内接收到RAR,则如果两个R比特设置为00或者10,则UE根据BI执行随机接入回退,否则不执行。如果UE是在大于10ms的时间收到RAR,则如果两个R比特设置为01或者10,UE根据BI执行随机接入回退,否则不执行。进一步,如果UE找到了自己RAR,则UE根据RAR的调度发送msg3;如果UE没有找到RAR,则检测BI决定是否执行随机接入回退,再次发起随机接入。
本申请实施例的技术方案,扩大RAR的窗口长度,通过MAC RAR中的R比特位指示该RAR关联的PRACH,同时通过E/T/R/R/BI subheader中的一个或两个R比特位指示BI关联的PRACH。
图6为本申请实施例提供的随机接入装置的结构组成示意图一,如图6所示,所述随机接入装置包括:
接收单元601,用于在第一窗口接收第一随机接入响应,所述第一随机接入响应携带第一信息,所述第一信息用于指示所述第一随机接入响应关联的随机接入信道。
在一实施方式中,所述接收单元601,用于在第一窗口检测到MAC PDU,从所述MAC PDU中获取与第一前导码标识对应的第一随机接入响应,其中,所述第一前导码标识是所述终端发送的前导码的标识。
在一实施方式中,所述装置还包括处理单元602;所述接收单元601在第一窗口的第一时间范围检测到所述MAC PDU的情况下:
如果所述第一随机接入响应中携带的第一信息的取值为第一值,则所述处理单元602确定所述第一随机接入响应是响应所述终端的随机接入响应;
如果所述第一随机接入响应中携带的第一信息的取值为第二值,则所述处理单元 602丢弃所述第一随机接入响应。
在一实施方式中,所述装置还包括处理单元602;所述接收单元601在第一窗口的第二时间范围检测到所述MAC PDU的情况下:
如果所述第一随机接入响应中携带的第一信息的取值为第二值,则所述处理单元602确定所述第一随机接入响应是响应所述终端的随机接入响应;
如果所述第一随机接入响应中携带的第一信息的取值为第一值,则所述处理单元602丢弃所述第一随机接入响应。
在一实施方式中,所述接收单元601,还用于从所述MAC PDU中获取第一子头,所述第一子头包括回退指示信息和第二信息,所述第二信息用于指示所述回退指示信息关联的随机接入信道。
在一实施方式中,所述装置还包括处理单元602;所述接收单元601在第一窗口的第一时间范围检测到所述MAC PDU的情况下:
如果所述第二信息的取值为第一值,则所述处理单元602根据所述回退指示信息执行随机接入回退;
如果所述第二信息的取值为第二值,则所述处理单元602不执行随机接入回退。
在一实施方式中,所述装置还包括处理单元602;所述接收单元601在第一窗口的第二时间范围检测到所述MAC PDU的情况下:
如果所述第二信息的取值为第二值,则所述处理单元602根据所述回退指示信息执行随机接入回退;
如果所述第二信息的取值为第一值,则所述处理单元602不执行随机接入回退。
在一实施方式中,所述装置还包括处理单元602;所述接收单元601在第一窗口的第一时间范围检测到所述MAC PDU的情况下:
如果所述第二信息的取值为第一值或第三值,则所述处理单元602根据所述回退指示信息执行随机接入回退;
如果所述第二信息的取值为第二值或第四值,则所述处理单元602不执行随机接入回退。
在一实施方式中,所述装置还包括处理单元602;所述接收单元601在第一窗口的第二时间范围检测到所述MAC PDU的情况下:
如果所述第二信息的取值为第二值或第三值,则所述处理单元602根据所述回退指示信息执行随机接入回退;
如果所述第二信息的取值为第一值或第四值,则所述处理单元602不执行随机接入回退。
在一实施方式中,所述第一窗口的第一时间范围是指所述第一窗口的前10ms以内的时间范围。
在一实施方式中,所述第一窗口的第二时间范围是指所述第一窗口的前10ms以外的时间范围。
本领域技术人员应当理解,本申请实施例的上述随机接入装置的相关描述可以参照本申请实施例的随机接入方法的相关描述进行理解。
图7为本申请实施例提供的随机接入装置的结构组成示意图二,如图7所示,所述随机接入装置包括:
发送单元701,用于在第一窗口发送至少一个随机接入响应;其中,所述随机接入响应携带第一信息,所述第一信息用于指示该随机接入响应关联的随机接入信道。
在一实施方式中,所述装置还包括:
接收单元702,用于接收第一终端在第一随机接入信道上发送的前导码,接收第 二终端在第二随机接入信道上发送的前导码;
处理单元703,用于基于所述第一随机接入信道的资源计算第一RA-RNTI,基于所述第二随机接入信道的资源计算第二RA-RNTI;
所述发送单元701,用于所述第一RA-RNTI和所述第二RA-RNTI相同的情况下,将所述第一终端的第一随机接入响应和所述终端的第二随机接入响应复用在所述MAC PDU中进行发送;其中,所述第一随机接入响应携带的第一信息用于指示所述第一随机接入响应关联所述第一随机接入信道,所述第二随机接入响应携带的第一信息用于指示所述第二随机接入响应关联所述第二随机接入信道;其中,所述第一随机接入信道的传输时间早于所述第二随机接入信道的传输时间,所述第二随机接入信道的传输时间早于所述MAC PDU的传输时间。
在一实施方式中,所述第一随机接入响应中携带的第一信息的取值为第二值,所述第二值用于指示所述第一随机接入响应关联所述第一随机接入信道;
所述第二随机接入响应中携带的第一信息的取值为第一值,所述第一值用于指示所述第二随机接入响应关联所述第二随机接入信道。
在一实施方式中,所述MAC PDU中的第一子头包括回退指示信息和第二信息,所述第二信息用于指示所述回退指示信息关联的随机接入信道。
在一实施方式中,所述第二信息的取值为第二值,所述第二值用于指示所述回退指示信息关联所述第一随机接入信道;或者,
所述第二信息的取值为第一值,所述第一值用于指示所述回退指示信息关联所述第二随机接入信道。
在一实施方式中,所述第二信息的取值为第二值,所述第二值用于指示所述回退指示信息关联所述第一随机接入信道;或者,
所述第二信息的取值为第一值,所述第一值用于指示所述回退指示信息关联所述第二随机接入信道;或者,
所述第二信息的取值为第三值,所述第三值用于指示所述回退指示信息关联所述第一随机接入信道和所述第二随机接入信道;或者,
所述第二信息的取值为第四值,所述第四值为预留信息。
在一实施方式中,所述发送单元701,用于在第一终端的第一窗口内抢占信道成功后,发送所述MAC PDU;所述装置还包括:
处理单元,用于在所述第一终端的第一窗口内抢占信道失败后,悬挂所述第一终端的第一随机接入响应。
本领域技术人员应当理解,本申请实施例的上述随机接入装置的相关描述可以参照本申请实施例的随机接入方法的相关描述进行理解。
图8是本申请实施例提供的一种通信设备600示意性结构图。该通信设备可以是终端,也可以是网络设备,图8所示的通信设备600包括处理器610,处理器610可以从存储器中调用并运行计算机程序,以实现本申请实施例中的方法。
可选地,如图8所示,通信设备600还可以包括存储器620。其中,处理器610可以从存储器620中调用并运行计算机程序,以实现本申请实施例中的方法。
其中,存储器620可以是独立于处理器610的一个单独的器件,也可以集成在处理器610中。
可选地,如图8所示,通信设备600还可以包括收发器630,处理器610可以控制该收发器630与其他设备进行通信,具体地,可以向其他设备发送信息或数据,或接收其他设备发送的信息或数据。
其中,收发器630可以包括发射机和接收机。收发器630还可以进一步包括天线, 天线的数量可以为一个或多个。
可选地,该通信设备600具体可为本申请实施例的网络设备,并且该通信设备600可以实现本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该通信设备600具体可为本申请实施例的移动终端/终端,并且该通信设备600可以实现本申请实施例的各个方法中由移动终端/终端实现的相应流程,为了简洁,在此不再赘述。
图9是本申请实施例的芯片的示意性结构图。图9所示的芯片700包括处理器710,处理器710可以从存储器中调用并运行计算机程序,以实现本申请实施例中的方法。
可选地,如图9所示,芯片700还可以包括存储器720。其中,处理器710可以从存储器720中调用并运行计算机程序,以实现本申请实施例中的方法。
其中,存储器720可以是独立于处理器710的一个单独的器件,也可以集成在处理器710中。
可选地,该芯片700还可以包括输入接口730。其中,处理器710可以控制该输入接口730与其他设备或芯片进行通信,具体地,可以获取其他设备或芯片发送的信息或数据。
可选地,该芯片700还可以包括输出接口740。其中,处理器710可以控制该输出接口740与其他设备或芯片进行通信,具体地,可以向其他设备或芯片输出信息或数据。
可选地,该芯片可应用于本申请实施例中的网络设备,并且该芯片可以实现本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该芯片可应用于本申请实施例中的移动终端/终端,并且该芯片可以实现本申请实施例的各个方法中由移动终端/终端实现的相应流程,为了简洁,在此不再赘述。
应理解,本申请实施例提到的芯片还可以称为***级芯片,***芯片,芯片***或片上***芯片等。
图10是本申请实施例提供的一种通信***900的示意性框图。如图10所示,该通信***900包括终端910和网络设备920。
其中,该终端910可以用于实现上述方法中由终端实现的相应的功能,以及该网络设备920可以用于实现上述方法中由网络设备实现的相应的功能为了简洁,在此不再赘述。
应理解,本申请实施例的处理器可能是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现成可编程门阵列(Field Programmable Gate Array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器,处理器读取存储器中的信息,结合其硬件完成上述方法的步骤。
可以理解,本申请实施例中的存储器可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(Read-Only Memory,ROM)、可编程只读存储器(Programmable ROM,PROM)、可 擦除可编程只读存储器(Erasable PROM,EPROM)、电可擦除可编程只读存储器(Electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(Static RAM,SRAM)、动态随机存取存储器(Dynamic RAM,DRAM)、同步动态随机存取存储器(Synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM,DR RAM)。应注意,本文描述的***和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解,上述存储器为示例性但不是限制性说明,例如,本申请实施例中的存储器还可以是静态随机存取存储器(static RAM,SRAM)、动态随机存取存储器(dynamic RAM,DRAM)、同步动态随机存取存储器(synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(synch link DRAM,SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM,DR RAM)等等。也就是说,本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读存储介质,用于存储计算机程序。
可选的,该计算机可读存储介质可应用于本申请实施例中的网络设备,并且该计算机程序使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该计算机可读存储介质可应用于本申请实施例中的移动终端/终端,并且该计算机程序使得计算机执行本申请实施例的各个方法中由移动终端/终端实现的相应流程,为了简洁,在此不再赘述。
本申请实施例还提供了一种计算机程序产品,包括计算机程序指令。
可选的,该计算机程序产品可应用于本申请实施例中的网络设备,并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该计算机程序产品可应用于本申请实施例中的移动终端/终端,并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由移动终端/终端实现的相应流程,为了简洁,在此不再赘述。
本申请实施例还提供了一种计算机程序。
可选的,该计算机程序可应用于本申请实施例中的网络设备,当该计算机程序在计算机上运行时,使得计算机执行本申请实施例的各个方法中由网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该计算机程序可应用于本申请实施例中的移动终端/终端,当该计算机程序在计算机上运行时,使得计算机执行本申请实施例的各个方法中由移动终端/终端实现的相应流程,为了简洁,在此不再赘述。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的***、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的***、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个***,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(Read-Only Memory,)ROM、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应所述以权利要求的保护范围为准。
Claims (46)
- 一种随机接入方法,所述方法包括:终端在第一窗口接收第一随机接入响应,所述第一随机接入响应携带第一信息,所述第一信息用于指示所述第一随机接入响应关联的随机接入信道。
- 根据权利要求1所述的方法,其中,所述终端在第一窗口接收第一随机接入响应,包括:所述终端在第一窗口检测到媒体接入控制协议数据单元MAC PDU,从所述MAC PDU中获取与第一前导码标识对应的第一随机接入响应,其中,所述第一前导码标识是所述终端发送的前导码的标识。
- 根据权利要求2所述的方法,其中,所述终端在第一窗口的第一时间范围检测到所述MAC PDU的情况下,所述方法还包括:如果所述第一随机接入响应中携带的第一信息的取值为第一值,则所述终端确定所述第一随机接入响应是响应所述终端的随机接入响应;如果所述第一随机接入响应中携带的第一信息的取值为第二值,则所述终端丢弃所述第一随机接入响应。
- 根据权利要求2或3所述的方法,其中,所述终端在第一窗口的第二时间范围检测到所述MAC PDU的情况下,所述方法还包括:如果所述第一随机接入响应中携带的第一信息的取值为第二值,则所述终端确定所述第一随机接入响应是响应所述终端的随机接入响应;如果所述第一随机接入响应中携带的第一信息的取值为第一值,则所述终端丢弃所述第一随机接入响应。
- 根据权利要求2至4中任一项所述的方法,其中,所述方法还包括:所述终端从所述MAC PDU中获取第一子头,所述第一子头包括回退指示信息和第二信息,所述第二信息用于指示所述回退指示信息关联的随机接入信道。
- 根据权利要求5所述的方法,其中,所述终端在第一窗口的第一时间范围检测到所述MAC PDU的情况下,所述方法还包括:如果所述第二信息的取值为第一值,则所述终端根据所述回退指示信息执行随机接入回退;如果所述第二信息的取值为第二值,则所述终端不执行随机接入回退。
- 根据权利要求5或6所述的方法,其中,所述终端在第一窗口的第二时间范围检测到所述MAC PDU的情况下,所述方法还包括:如果所述第二信息的取值为第二值,则所述终端根据所述回退指示信息执行随机接入回退;如果所述第二信息的取值为第一值,则所述终端不执行随机接入回退。
- 根据权利要求5所述的方法,其中,所述终端在第一窗口的第一时间范围检测到所述MAC PDU的情况下,所述方法还包括:如果所述第二信息的取值为第一值或第三值,则所述终端根据所述回退指示信息执行随机接入回退;如果所述第二信息的取值为第二值或第四值,则所述终端不执行随机接入回退。
- 根据权利要求5或8所述的方法,其中,所述终端在第一窗口的第二时间范围检测到所述MAC PDU的情况下,所述方法还包括:如果所述第二信息的取值为第二值或第三值,则所述终端根据所述回退指示信息 执行随机接入回退;如果所述第二信息的取值为第一值或第四值,则所述终端不执行随机接入回退。
- 根据权利要求3、6、8中任一项所述的方法,其中,所述第一窗口的第一时间范围是指所述第一窗口的前10ms以内的时间范围。
- 根据权利要求4、7、9中任一项所述的方法,其中,所述第一窗口的第二时间范围是指所述第一窗口的前10ms以外的时间范围。
- 一种随机接入方法,所述方法包括:基站在第一窗口发送至少一个随机接入响应;其中,所述随机接入响应携带第一信息,所述第一信息用于指示该随机接入响应关联的随机接入信道。
- 根据权利要求12所述的方法,其中,所述方法还包括:所述基站接收第一终端在第一随机接入信道上发送的前导码,接收第二终端在第二随机接入信道上发送的前导码;所述基站基于所述第一随机接入信道的资源计算第一RA-RNTI,基于所述第二随机接入信道的资源计算第二RA-RNTI;所述第一RA-RNTI和所述第二RA-RNTI相同的情况下,所述基站将所述第一终端的第一随机接入响应和所述终端的第二随机接入响应复用在MAC PDU中进行发送;其中,所述第一随机接入响应携带的第一信息用于指示所述第一随机接入响应关联所述第一随机接入信道,所述第二随机接入响应携带的第一信息用于指示所述第二随机接入响应关联所述第二随机接入信道;其中,所述第一随机接入信道的传输时间早于所述第二随机接入信道的传输时间,所述第二随机接入信道的传输时间早于所述MAC PDU的传输时间。
- 根据权利要求13所述的方法,其中,所述第一随机接入响应中携带的第一信息的取值为第二值,所述第二值用于指示所述第一随机接入响应关联所述第一随机接入信道;所述第二随机接入响应中携带的第一信息的取值为第一值,所述第一值用于指示所述第二随机接入响应关联所述第二随机接入信道。
- 根据权利要求13或14所述的方法,其中,所述MAC PDU中的第一子头包括回退指示信息和第二信息,所述第二信息用于指示所述回退指示信息关联的随机接入信道。
- 根据权利要求15所述的方法,其中,所述第二信息的取值为第二值,所述第二值用于指示所述回退指示信息关联所述第一随机接入信道;或者,所述第二信息的取值为第一值,所述第一值用于指示所述回退指示信息关联所述第二随机接入信道。
- 根据权利要求15所述的方法,其中,所述第二信息的取值为第二值,所述第二值用于指示所述回退指示信息关联所述第一随机接入信道;或者,所述第二信息的取值为第一值,所述第一值用于指示所述回退指示信息关联所述第二随机接入信道;或者,所述第二信息的取值为第三值,所述第三值用于指示所述回退指示信息关联所述第一随机接入信道和所述第二随机接入信道;或者,所述第二信息的取值为第四值,所述第四值为预留信息。
- 根据权利要求13至17中任一项所述的方法,其中,所述基站在第一终端的第一窗口内抢占信道成功后,发送所述MAC PDU;所述方法还包括:所述基站在所述第一终端的第一窗口内抢占信道失败后,悬挂所述第一终端的第一随机接入响应。
- 一种随机接入装置,所述装置包括:接收单元,用于在第一窗口接收第一随机接入响应,所述第一随机接入响应携带第一信息,所述第一信息用于指示所述第一随机接入响应关联的随机接入信道。
- 根据权利要求19所述的装置,其中,所述接收单元,用于在第一窗口检测到MAC PDU,从所述MAC PDU中获取与第一前导码标识对应的第一随机接入响应,其中,所述第一前导码标识是所述终端发送的前导码的标识。
- 根据权利要求20所述的装置,其中,所述装置还包括处理单元;所述接收单元在第一窗口的第一时间范围检测到所述MAC PDU的情况下:如果所述第一随机接入响应中携带的第一信息的取值为第一值,则所述处理单元确定所述第一随机接入响应是响应所述终端的随机接入响应;如果所述第一随机接入响应中携带的第一信息的取值为第二值,则所述处理单元丢弃所述第一随机接入响应。
- 根据权利要求20或21所述的装置,其中,所述装置还包括处理单元;所述接收单元在第一窗口的第二时间范围检测到所述MAC PDU的情况下:如果所述第一随机接入响应中携带的第一信息的取值为第二值,则所述处理单元确定所述第一随机接入响应是响应所述终端的随机接入响应;如果所述第一随机接入响应中携带的第一信息的取值为第一值,则所述处理单元丢弃所述第一随机接入响应。
- 根据权利要求20至22中任一项所述的装置,其中,所述接收单元,还用于从所述MAC PDU中获取第一子头,所述第一子头包括回退指示信息和第二信息,所述第二信息用于指示所述回退指示信息关联的随机接入信道。
- 根据权利要求23所述的装置,其中,所述装置还包括处理单元;所述接收单元在第一窗口的第一时间范围检测到所述MAC PDU的情况下:如果所述第二信息的取值为第一值,则所述处理单元根据所述回退指示信息执行随机接入回退;如果所述第二信息的取值为第二值,则所述处理单元不执行随机接入回退。
- 根据权利要求23或24所述的装置,其中,所述装置还包括处理单元;所述接收单元在第一窗口的第二时间范围检测到所述MAC PDU的情况下:如果所述第二信息的取值为第二值,则所述处理单元根据所述回退指示信息执行随机接入回退;如果所述第二信息的取值为第一值,则所述处理单元不执行随机接入回退。
- 根据权利要求23所述的装置,其中,所述装置还包括处理单元;所述接收单元在第一窗口的第一时间范围检测到所述MAC PDU的情况下:如果所述第二信息的取值为第一值或第三值,则所述处理单元根据所述回退指示信息执行随机接入回退;如果所述第二信息的取值为第二值或第四值,则所述处理单元不执行随机接入回退。
- 根据权利要求23或26所述的装置,其中,所述装置还包括处理单元;所述接收单元在第一窗口的第二时间范围检测到所述MAC PDU的情况下:如果所述第二信息的取值为第二值或第三值,则所述处理单元根据所述回退指示信息执行随机接入回退;如果所述第二信息的取值为第一值或第四值,则所述处理单元不执行随机接入回 退。
- 根据权利要求21、24、26中任一项所述的装置,其中,所述第一窗口的第一时间范围是指所述第一窗口的前10ms以内的时间范围。
- 根据权利要求22、25、27中任一项所述的装置,其中,所述第一窗口的第二时间范围是指所述第一窗口的前10ms以外的时间范围。
- 一种随机接入装置,所述装置包括:发送单元,用于在第一窗口发送至少一个随机接入响应;其中,所述随机接入响应携带第一信息,所述第一信息用于指示该随机接入响应关联的随机接入信道。
- 根据权利要求30所述的装置,其中,所述装置还包括:接收单元,用于接收第一终端在第一随机接入信道上发送的前导码,接收第二终端在第二随机接入信道上发送的前导码;处理单元,用于基于所述第一随机接入信道的资源计算第一RA-RNTI,基于所述第二随机接入信道的资源计算第二RA-RNTI;所述发送单元,用于所述第一RA-RNTI和所述第二RA-RNTI相同的情况下,将所述第一终端的第一随机接入响应和所述终端的第二随机接入响应复用在所述MAC PDU中进行发送;其中,所述第一随机接入响应携带的第一信息用于指示所述第一随机接入响应关联所述第一随机接入信道,所述第二随机接入响应携带的第一信息用于指示所述第二随机接入响应关联所述第二随机接入信道;其中,所述第一随机接入信道的传输时间早于所述第二随机接入信道的传输时间,所述第二随机接入信道的传输时间早于所述MAC PDU的传输时间。
- 根据权利要求31所述的装置,其中,所述第一随机接入响应中携带的第一信息的取值为第二值,所述第二值用于指示所述第一随机接入响应关联所述第一随机接入信道;所述第二随机接入响应中携带的第一信息的取值为第一值,所述第一值用于指示所述第二随机接入响应关联所述第二随机接入信道。
- 根据权利要求31或32所述的装置,其中,所述MAC PDU中的第一子头包括回退指示信息和第二信息,所述第二信息用于指示所述回退指示信息关联的随机接入信道。
- 根据权利要求33所述的装置,其中,所述第二信息的取值为第二值,所述第二值用于指示所述回退指示信息关联所述第一随机接入信道;或者,所述第二信息的取值为第一值,所述第一值用于指示所述回退指示信息关联所述第二随机接入信道。
- 根据权利要求33所述的装置,其中,所述第二信息的取值为第二值,所述第二值用于指示所述回退指示信息关联所述第一随机接入信道;或者,所述第二信息的取值为第一值,所述第一值用于指示所述回退指示信息关联所述第二随机接入信道;或者,所述第二信息的取值为第三值,所述第三值用于指示所述回退指示信息关联所述第一随机接入信道和所述第二随机接入信道;或者,所述第二信息的取值为第四值,所述第四值为预留信息。
- 根据权利要求32至35中任一项所述的装置,其中,所述发送单元,用于在第一终端的第一窗口内抢占信道成功后,发送所述MAC PDU;所述装置还包括:处理单元,用于在所述第一终端的第一窗口内抢占信道失败后,悬挂所述第一终 端的第一随机接入响应。
- 一种终端,包括:处理器和存储器,该存储器用于存储计算机程序,所述处理器用于调用并运行所述存储器中存储的计算机程序,执行如权利要求1至11中任一项所述的方法。
- 一种网络设备,包括:处理器和存储器,该存储器用于存储计算机程序,所述处理器用于调用并运行所述存储器中存储的计算机程序,执行如权利要求12至18中任一项所述的方法。
- 一种芯片,包括:处理器,用于从存储器中调用并运行计算机程序,使得安装有所述芯片的设备执行如权利要求1至11中任一项所述的方法。
- 一种芯片,包括:处理器,用于从存储器中调用并运行计算机程序,使得安装有所述芯片的设备执行如权利要求12至18中任一项所述的方法。
- 一种计算机可读存储介质,用于存储计算机程序,所述计算机程序使得计算机执行如权利要求1至11中任一项所述的方法。
- 一种计算机可读存储介质,用于存储计算机程序,所述计算机程序使得计算机执行如权利要求12至18中任一项所述的方法。
- 一种计算机程序产品,包括计算机程序指令,该计算机程序指令使得计算机执行如权利要求1至11中任一项所述的方法。
- 一种计算机程序产品,包括计算机程序指令,该计算机程序指令使得计算机执行如权利要求12至18中任一项所述的方法。
- 一种计算机程序,所述计算机程序使得计算机执行如权利要求1至11中任一项所述的方法。
- 一种计算机程序,所述计算机程序使得计算机执行如权利要求12至18中任一项所述的方法。
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