WO2014106498A1 - 一种前导序列的传输方法、装置及系统 - Google Patents
一种前导序列的传输方法、装置及系统 Download PDFInfo
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- WO2014106498A1 WO2014106498A1 PCT/CN2014/070241 CN2014070241W WO2014106498A1 WO 2014106498 A1 WO2014106498 A1 WO 2014106498A1 CN 2014070241 W CN2014070241 W CN 2014070241W WO 2014106498 A1 WO2014106498 A1 WO 2014106498A1
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- WIPO (PCT)
- Prior art keywords
- preset
- preamble sequence
- base station
- prach
- user equipment
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/30—Resource management for broadcast services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
Definitions
- one radio frame is composed of 10 subframes, and 10 subframes are respectively subframe 0.
- each subframe of the radio frame is 1 millisecond. If the preamble sequence is also 1 millisecond, each subframe of the radio frame can transmit a preamble sequence.
- the process of the user equipment randomly accessing the base station is the first step of the user equipment to implement uplink synchronization and establish a connection with the base station.
- the response message is sent in response to the user equipment, so that the user equipment can access the base station.
- the base station cannot correctly receive the preamble sequence or the received preamble sequence signal strength. If the user equipment does not receive the response message from the base station within a predetermined time, the user equipment selects another random access channel to send the reselected preamble sequence to the base station, which is The user equipment continuously sends a randomly selected preamble sequence to the base station, and the base station The matching is still not correct, resulting in a matching probability of the base station and a decrease in the efficiency of the user equipment accessing the base station.
- Embodiments of the present invention provide a method, an apparatus, and a system for transmitting a preamble sequence, which can enhance a signal strength of a preamble sequence received by a base station, thereby improving a matching probability of the base station and an efficiency of accessing the base station by the user equipment.
- an embodiment of the present invention provides a method for transmitting a preamble sequence, including: acquiring system information broadcasted by a base station or a physical broadcast channel PBCH, where the system information or the PBCH includes a preset physical random access channel (PRACH), The preset PRACH includes preset m radio frames, where m is a positive integer;
- PRACH physical random access channel
- the method for determining that the number of repetitions of the preamble sequence for the random access on the preset resource location of the preset PRACH is n times includes:
- Determining, according to the system information or the PBCH, the number of repetitions of the preamble sequence on the preset resource location of the preset PRACH is n times;
- the sending is performed on the n preset resource locations of the preset PRACH
- the preamble sequence to the base station includes:
- the method further includes:
- an embodiment of the present invention further provides a method for transmitting a preamble sequence, including:
- the system information or the PBCH includes a preset PRACH
- the preset PRACH includes a preset m radio frames, where m is a positive integer
- n pre-predetermined PRACH The k preamble sequences are received from the user equipment, where the k preamble sequences are the number of repetitions of the preamble sequence determined by the user equipment for determining the random access in the preset resource location of the preset PRACH. After n times, sent on n preset resource locations of the preset PRACH, where ln 1 0m , kn.
- the method before the receiving, by the user equipment, the k preamble sequences on the n preset resource locations of the preset PRACH, the method further includes:
- the receiving, by the user equipment, the n preset resource locations of the preset PRACH includes:
- an embodiment of the present invention provides a user equipment, including: a first receiving unit, configured to acquire system information or a PBCH broadcasted by the base station, where the system information or the PBCH includes a preset PRACH, where the preset PRACH includes a preset m radio frames, where m is a positive integer;
- a first processing unit configured to determine that the number of repetitions of the preamble sequence for random access on the preset resource location of the preset PRACH is n times, where, l n 10m;
- a first sending unit configured to send the preamble sequence to the base station at n preset resource locations of the preset PRACH.
- the first processing unit is configured to determine, according to the system information or the PBCH, a preset resource location of the preamble sequence in the preset PRACH.
- the number of repetitions is n times;
- the first receiving unit is configured to receive a downlink reference signal that is sent by the base station, and the first processing unit is configured to determine, according to the downlink reference signal, that the preamble sequence is in the preset PRACH.
- the number of repetitions at the preset resource location is n times;
- the first processing unit is specifically configured to determine, according to a pre-defined wireless communication protocol, that the number of repetitions of the preamble sequence at the preset resource location of the preset PRACH is n times.
- the first sending unit is specifically configured to preset m wireless devices in the preset PRACH
- the preamble sequence is transmitted to the base station in n preset subframes in the frame.
- the first sending unit is used by After transmitting the preamble sequence to the base station at the n preset resource locations of the preset PRACH, if the first receiving unit does not receive a response message from the base station, the first sending The unit is further configured to send the preamble sequence to the base station on the p preset resource locations of the preset PRACH, where p>n.
- an embodiment of the present invention provides a base station, including:
- a second sending unit configured to broadcast system information or a PBCH, where the system information or the PBCH includes a preset PRACH, where the preset PRACH includes a preset m radio frames, Where m is a positive integer;
- a second receiving unit configured to receive, at the n preset resource locations of the preset PRACH, k preamble sequences from the user equipment, where the k preamble sequences are determined by the user equipment for random access
- the n pre-reset resource locations of the preset PRACH are sent, where 1 n 1 0m, kn.
- the second sending unit is further configured to send a downlink reference signal, so that the user equipment determines the preamble sequence according to the received downlink reference signal.
- the number of repetitions on the preset resource location of the preset PRACH is n times.
- the second receiving unit is specifically configured to preset m wireless devices in the preset PRACH
- the k preamble sequences from the user equipment are received within n preset subframes in the frame.
- the embodiment of the present invention provides a transmission system of a preamble sequence, including: the user equipment in the foregoing third aspect, and the base station in the fourth aspect above.
- the embodiment of the present invention provides a method, a device, and a system for transmitting a preamble sequence, including: acquiring system information broadcasted by a base station or a physical broadcast channel PBCH, where the system information or the PBCH includes a preset physical random access channel PRACH,
- the preset PRACH includes preset m radio frames, where m is a positive integer; determining a preamble sequence for random access at the preset
- the number of repetitions of the preset resource location of the PRACH is n times, where l n 1 0m; the preamble sequence is sent to the base station at the n preset resource locations of the preset PRACH.
- the user equipment sends the preamble sequence to the base station at the n preset resource locations of the preset PRACH, that is, the number of repetitions of the preamble sequence sent by the user equipment to the base station increases, so that the preamble sequence received by the base station is The signal strength is enhanced, so that the preamble sequence can be correctly matched, thereby improving the matching probability of the base station and the efficiency of the user equipment accessing the cell.
- FIG. 1 is a schematic structural diagram of a PRACH provided by the prior art
- FIG. 2 is a flowchart of a method for transmitting a preamble sequence according to an embodiment of the present invention
- FIG. 3 is a schematic structural diagram 1 of a preamble sequence according to an embodiment of the present invention.
- FIG. 4 is a schematic structural diagram 2 of a preamble sequence according to an embodiment of the present invention.
- FIG. 5 is a schematic structural diagram 3 of a preamble sequence according to an embodiment of the present disclosure.
- FIG. 6 is a flowchart of a method for transmitting a preamble sequence according to an embodiment of the present invention.
- FIG. 7 is a flowchart of a method for transmitting a preamble sequence according to an embodiment of the present invention.
- FIG. 8 is a schematic structural diagram 1 of a preset PRACH according to an embodiment of the present invention
- FIG. 9 is a schematic structural diagram 2 of a preset PRACH according to an embodiment of the present invention
- FIG. 10 is a schematic structural diagram of a preset PRACH according to an embodiment of the present invention
- FIG. 1 is a schematic structural diagram 4 of a preamble sequence according to an embodiment of the present invention
- FIG. 12 is a schematic structural diagram 5 of a preamble sequence according to an embodiment of the present disclosure.
- FIG. 1 is a schematic structural diagram 1 of a user equipment according to an embodiment of the present invention
- FIG. 1 is a schematic structural diagram 1 of a base station according to an embodiment of the present disclosure
- FIG. 15 is a schematic structural diagram 2 of a base station according to an embodiment of the present disclosure.
- FIG. 1 is a schematic structural diagram 2 of a user equipment according to an embodiment of the present invention
- FIG. 1 is a schematic structural diagram 3 of a base station according to an embodiment of the present disclosure
- FIG. 18 is a schematic structural diagram 4 of a base station according to an embodiment of the present disclosure.
- FIG. 19 is a block diagram of a transmission system of a preamble sequence according to an embodiment of the present invention.
- the process of the user equipment accessing the base station randomly is the first step of the user equipment to implement uplink synchronization, and establishing a connection with the base station.
- the user equipment first receives the system information broadcast by the base station. Or PBCH (Physical Broadcast Channel), and then transmitting a randomly selected one of the preamble sequences to the base station according to the system information or the PBCH on a selected random access channel, the user equipment will wait to receive the corresponding from the base station. The response message of the preamble sequence. If the user equipment does not receive the response message from the base station within the preset time, the user equipment selects another random access channel to transmit the reselected one of the preamble sequences to the base station.
- PBCH Physical Broadcast Channel
- the system information or the PBCH broadcast by the base station includes a PRACH (Physical Random Access Channel) and a preamble sequence available to the user equipment.
- PRACH Physical Random Access Channel
- the PRACH can be used to indicate a random access resource that can be used by a user equipment to access a base station.
- the PRACH shown in FIG. 1 includes two 10 millisecond radio frames, that is, Including 20 1 millisecond subframes, each frame is provided with 5 chances of transmitting a preamble sequence, and the starting point of the preamble sequence is aligned with the starting point of the corresponding uplink subframe of the user equipment (assuming the timing advance is 0).
- the user equipment can send the preamble sequence to the base station in the subframe set by the PRACH, and the preamble sequence occupies 6 PRBs (Physical Resource Blocks) in the frequency domain. Piece) .
- PRBs Physical Resource Blocks
- one PRB has one slot in the time domain and twelve subcarriers in the frequency domain. In particular, each subframe contains 2 time slots.
- An embodiment of the present invention provides a method for transmitting a preamble sequence, which is related to a user equipment side, as shown in FIG. 2, and includes:
- the user equipment acquires system information broadcasted by the base station or a physical broadcast channel PBC H, where the system information or the PBCH includes a preset physical random access channel PRACH, where the preset PRACH includes a preset m radio frames, where m is a positive integer. .
- the user equipment may obtain the system information or the PBCH broadcasted by the base station, and the system information or the PBCH includes the preset PRACH, and multiple preamble sequences available to the user equipment. Both the preset PRACH and the available preamble sequences are necessary for the user equipment to access the base station.
- the preset PRACH includes a preset m radio frames, where m is a positive integer, that is, the value of m may be 1, 2, 3, etc., and the present invention is not limited.
- the user equipment determines that the number of repetitions of the preamble sequence used for random access on the preset resource location of the preset PRACH is n times, where, l n 10m.
- the user equipment may randomly select a preamble sequence for random access in multiple preamble sequences according to the obtained system information or PBCH from the base station, and the user equipment may determine, according to a preset rule, that it is used for random access.
- the number of repetitions of the preamble sequence of the base station at the preset resource location of the preset PRACH is n times, where ln 10m.
- the signal format of the preamble includes CP (Cyclic Prefix), preamble, and guard time.
- CP Cyclic Prefix
- preamble the signal formats of the three preamble sequences are defined, which are a 1 millisecond preamble sequence, a 2 millisecond preamble sequence, and a 3 millisecond preamble sequence, as shown in FIG.
- the preamble sequence is the signal format of the preamble sequence of 1 millisecond.
- the length of the preamble is 0.8 milliseconds
- the length of the CP and the length of the guard time are respectively 0.1 milliseconds
- the preamble sequence shown in Fig. 4 is 2 milliseconds.
- the signal format of the preamble sequence in the 1 millisecond preamble sequence, the length of the preamble is 1.6 milliseconds, the length of the CP and the length of the guard time are respectively 0.2 milliseconds;
- the preamble sequence shown in Fig. 5 is the signal of the preamble sequence of 3 milliseconds Format, in the 3 millisecond preamble sequence, the length of the preamble is 1.6 milliseconds, and the length of the CP and the length of the guard time are 0.7 milliseconds, respectively.
- preamble sequences are applied to different scenarios, and may be selected according to different coverage ranges of the base station.
- the longer the length of the CP the longer the round-trip delay can be applied, that is, the support can be supported.
- Larger base station coverage; the length of the preamble mainly affects the reception quality of the base station to the preamble sequence, and the longer preamble means that the base station can obtain better reception quality, thereby obtaining better demodulation performance.
- the signal sequence of the preamble sequence in the embodiment of the present invention may be 1 millisecond or 2 milliseconds, and may also be any other preamble sequence that satisfies the design requirements, and the present invention is not limited.
- the preamble sequence provided by the embodiment of the present invention is 1 millisecond as an example. If the preset PRACH includes a preset one 10 millisecond radio frame, in each subframe of each preset 10 millisecond radio frame.
- the preamble sequence can be sent once. In this case, the number of repetitions of the preamble sequence sent by the user equipment to the base station in the preset two 10 millisecond radio frames can be up to 20 times.
- the preamble sequence sent by the user equipment to the base station is 2X times, where X is a positive integer, and 2 2X 20 , the preamble sequence sent by the user equipment to the base station in the two 10 millisecond radio frames
- the number of repetitions may be 2' times (ie 2 times), 2 2 times (ie 4 times), 2 3 times (ie 8 times) or 24 times (ie 16 times);
- the preset PRACH includes For a preset four 10 millisecond radio frames, preferably, the number of repetitions of the preamble sequence sent by the user equipment to the base station may be up to 25 times (ie, 32 times).
- the user equipment may send the preamble sequence to the base station once every two subframes in the preset two 10 millisecond radio frames of the preset PRACH, that is,
- the number of repetitions of the preamble sequence transmitted by the user equipment to the base station may be up to 10 times in two radio frames.
- the number of repetitions of the preamble sequence transmitted by the user equipment to the base station may be 2, 4 or 8 times, respectively.
- the user equipment sends the preamble sequence to the base station at the n preset resource locations of the preset PRACH.
- the user equipment may send the preamble sequence to the base station at the n preset resource locations of the preset PRACH, so that the base station returns a response message corresponding to the preamble sequence after superimposing and matching all the received preamble sequences. Thereby, the user equipment is accessed to the base station.
- An embodiment of the present invention provides a method for transmitting a preamble sequence, which is related to a base station side, as shown in FIG. 6, and includes:
- the S20 base station broadcasts the system information or the PBCH, the system information or the PBCH includes a preset PRACH, and the preset PRACH includes a preset m radio frames, where m is a positive integer.
- the base station is in the range of its coverage, the periodic broadcast system information or the PBCH, the system information or the PBCH includes a preset PRACH and a plurality of preamble sequences available to the user equipment, and the preset PRACH includes a preset m radio frames, where
- the positive integer that is, the value of m may be 1, 2, 3, etc., and the invention is not limited.
- the base station receives K preamble sequences from the user equipment at the n preset resource locations of the preset PRACH, where, l n 10m, k n.
- the base station receives the k from the user equipment on the n preset resource locations of the preset PRACH.
- the preamble sequence, the k preamble sequences are selected by the user equipment according to the acquired system information or the PBCH of the base station, and are selected by the preamble sequence of the plurality of user equipments broadcasted by the base station, and determined to be used for random connection according to a preset rule.
- After the number of repetitions of the incoming preamble sequence on the preset resource location of the preset PRACH is n times, it is sent on n preset resource locations of the preset PRACH, where 1 n 10m, kn.
- the signal sequence of the preamble sequence provided by the embodiment of the present invention may be 1 millisecond, or 2 milliseconds, or any other preamble sequence that satisfies the requirements, which is not limited by the present invention.
- the method for transmitting the preamble sequence on the user equipment side and the method for transmitting the preamble sequence on the base station side are mutually corresponding, that is, the user equipment sends the preset resource positions of the preset PRACH.
- the preamble sequence, the base station receives the preamble sequence at the n preset resource locations.
- the base station receives the preamble sequence at the n preset resource locations of the preset PRACH, where k .
- the user equipment sends the preamble sequence to the base station at the n preset resource locations of the preset PRACH, that is, the number of repetitions of the preamble sequence sent by the user equipment to the base station increases, so that the base station receives the preamble
- the signal strength of the sequence is enhanced, so that the preamble sequence can be correctly matched, thereby improving the matching probability of the base station and the efficiency of the user equipment accessing the cell.
- the embodiment of the present invention further provides a method for transmitting a preamble sequence, as shown in FIG. 7, including:
- the S30 base station broadcast system information or the PBCH includes a preset PRACH and a plurality of preamble sequences, and the preset PRACH includes a preset one radio frame.
- the base station periodically broadcasts the system information or the PBCH in the range of its coverage.
- the system information or the PBCH includes a preset PRACH, and multiple preamble sequences available to the user equipment.
- the preset PRACH includes the preset two radio frames. It is assumed that the PRACH and the available preamble sequences are necessary conditions for the user equipment to access the base station.
- the user equipment acquires system information or a PBCH, and selects a preamble sequence for random access among the multiple preamble sequences according to the system information or the PBCH.
- the user equipment acquires the system information or the PBCH broadcasted by the base station, and randomly selects a preamble sequence for random access among the preamble sequences available to the plurality of user equipments according to the obtained system information or the PBCH.
- the user equipment determines that the number of repetitions of the preamble sequence for random access on the preset resource location of the preset PRACH is n times, where, l n 20.
- n 1, 1, 3, 4
- the number of repetitions of the preamble sequence sent by the user equipment to the base station may be 1, 2, 3, 4 times or
- the number of repetitions of the preamble sequence sent by the user equipment to the base station may be 2, 4, 8 or 16 times.
- the number of repetitions of the preamble sequence sent by the user equipment to the base station can be adaptively adjusted according to actual requirements and designs, and the present invention is not limited.
- each radio frame is typically 10 milliseconds.
- the user equipment determines, according to a preset rule, that the preamble sequence for random access has a repetition number of n times at a preset resource location of the preset PRACH, and may be any one of the following:
- the user equipment determines, according to the system information or the PBCH, the number of repetitions of the preamble sequence at the preset resource location of the preset PRACH is n times.
- the user equipment can learn from the system information broadcasted by the base station in the downlink or the PBCH that the preamble sequence sent to the base station is repeated n times on the preset resource location of the preset PRACH.
- the downlink may be defined as a process in which the base station sends a signal to the user equipment; in contrast, the uplink may be defined as a process in which the user equipment sends a signal to the base station.
- the user equipment receives the downlink reference signal sent by the base station, and determines, according to the downlink reference signal, the number of repetitions of the preamble sequence at the preset resource location of the preset PRACH is n times.
- the user equipment may measure its own link loss according to the downlink reference signal sent by the received base station, and different link loss levels correspond to the repetition times of different preamble sequences in the preset resource location of the preset PRACH.
- the preamble sequence provided by the embodiment of the present invention is 1 millisecond as an example, since it is assumed that the preset PRACH includes preset two 10 millisecond radio frames, and each subframe of each 10 millisecond radio frame can be used.
- the preamble sequence is sent once. In this case, the number of repetitions of the preamble sequence transmitted by the user equipment to the base station in the preset two 10 msec radio frames may be up to 20 times.
- the number of repetitions of the preamble sequence sent by the user equipment to the base station is 2X times, where X is a positive integer, and 2 2X 20 , the user equipment sends to the base station in a preset one 10 millisecond radio frame.
- the number of repetitions of preamble sequences may be 21 times, respectively (i.e., 2 times), 2 times 2 (i.e., 4 times), 23 times (i.e., 8) or 24 times (i.e. 16 times).
- the preamble sequence sent by the preferred user equipment to the base station is set in the preset number of repetitions of the two 10 millisecond radio frames. If the link loss is less than 50 dB, the number of repetitions of the corresponding preamble sequence is 4 times; if the link loss is greater than or equal to 50 dB and less than or equal to 100 dB, the corresponding number of repetitions of the preamble sequence is 8; if the link loss is greater than or equal to 100 dB, the corresponding number of repetitions of the preamble sequence is 16 times.
- the user equipment can determine the number of repetitions of the preamble sequence at the preset resource location of the preset PRACH according to a pre-defined wireless communication protocol.
- the user equipment can learn from the pre-defined wireless communication protocol that the number of repetitions of the preamble sequence transmitted to the base station at the preset resource location of the preset PRACH is n times. Specifically, when the wireless communication protocol is established, each operator establishes a preset number of repetitions of the preamble sequence sent by the user equipment to the base station to the preset resource location of the preset PRACH by n mutual agreement.
- the user equipment sends the preamble sequence to the base station at the n preset resource locations of the preset PRACH.
- the user equipment may send the preamble sequence to the base station at n preset resource locations of the preset PRACH.
- the user equipment may send the preamble sequence to the base station at n preset resource locations of one radio frame preset in the preset PRACH.
- the user equipment may send the preamble sequence to the base station in n preset subframes of one radio frame preset in the preset PRACH.
- n preset resource locations of the preset PRACH provided by the embodiment of the present invention include n preset resource locations of two radio frames preset in the preset PRACH.
- n preset resource locations of the preset two radio frames in the preset PRACH specifically include n in a preset one radio frame in the preset PRACH. Preset subframes.
- a schematic structural diagram of a preset PRACH according to an embodiment of the present invention includes a preset two consecutive radio frames.
- the user equipment may be the subframe 3 in the first frame.
- the subframe 7 in the first frame, the subframe 3 in the second frame, and the subframe 7 in the second frame respectively transmit the preamble sequence to the base station.
- FIG. 9 a schematic structural diagram of another preset PRACH according to an embodiment of the present invention includes a preset two consecutive radio frames.
- the user equipment may be the subframe 1 in the first frame.
- the subframe 3 in the first frame, the subframe 5 in the first frame, and the subframe 7 in the first frame respectively transmit the preamble sequence to the base station, or the user equipment may be in the second frame.
- the subframe 3, the subframe 5 in the second frame, the subframe 7 in the second frame, and the subframe 9 in the second frame respectively transmit the preamble sequence to the base station.
- the foregoing schematic structure of the preset PRACH is only an exemplary embodiment of the present invention.
- the preset PRACH provided by the present invention that is, the present invention provides
- the preset resource location of the preset PRACH can be adaptively adjusted according to actual requirements, and the present invention is not limited.
- the base station superimposes the signal strengths of the received k preamble sequences, where kn. After receiving, by the base station, k preamble sequences from the user equipment on the n preset resource locations of the preset PRACH, the base station superimposes the signal strengths of the received k preamble sequences, Medium, kn.
- the base station compares the signal strengths of the superposed k preamble sequences with a preset intensity threshold.
- the base station compares the signal strengths of the superposed k preamble sequences with the preset intensity thresholds, that is, the base station matches the signal strengths of the superposed k preamble sequences with the preset intensity thresholds.
- the base station If the signal strength of the superposed k preamble sequences is greater than or equal to the preset strength threshold, the base station returns a response message corresponding to the k preamble sequences.
- the signal strength of the superposed k preamble sequences is greater than or equal to the preset intensity threshold, that is, the signal strength after the base station superimposes the received k preamble sequences can match the preset intensity threshold, and the base station returns corresponding to the k preamble sequences. Response message to the user device.
- the base station superimposes the signal strengths of the received k preamble sequences, so that the base station adds the signal strengths of the received k preamble sequences to obtain the total signal of the k preamble sequences. Intensity, the base station compares the total signal strength with a preset intensity threshold, that is, the base station matches the total signal strength with a preset intensity threshold, if the total signal strength is greater than or equal to a preset intensity threshold, that is, the total The signal strength and the preset strength threshold can be correctly matched, and the base station sends a response message corresponding to the k preamble sequences to the user equipment, so that the user equipment accesses the base station.
- a preset intensity threshold that is, the base station matches the total signal strength with a preset intensity threshold
- the number of repetitions proposed by the foregoing user equipment for determining the number of repetitions of the preamble sequence for random access in the preset resource location of the preset PRACH is based on the maximum chain of the user equipment in advance.
- the maximum number of repetitions is set by the path loss, so that the user equipment can correctly match the received k preamble sequences and return the corresponding response after transmitting the selected preamble sequence on the n preset resource locations of the preset PRACH.
- the message is sent to the user equipment, so as to improve the matching probability of the base station and the efficiency of the user equipment accessing the base station.
- the user equipment may send the preamble sequence to the base station at the n preset resource locations of the preset PRACH according to the preset PRACH, if the preset is in the preset The user equipment does not detect the response message from the base station corresponding to the preamble sequence, and the user equipment may send the preamble sequence to the base station at the p preset resource locations of the preset PRACH, where P>n.
- the user equipment is preset in the pre-PRACH After the preamble sequence is sent to the base station at the resource location, if the user equipment does not receive the corresponding response message from the base station within the preset time, the user equipment may send the preamble sequence on the p preset resource locations of the preset PRACH. To the base station, where p>n.
- the n preset resource positions of the preset PRACH may be specifically n preset subframes in a preset preset one of the preset PRACHs, where the n preset subframes are preset.
- the sub-frames of the preamble sequence are sent repeatedly.
- the p preset resource positions of the preset PRACH may also be p preset sub-frames of one radio frame preset in the preset PRACH, and the p pre-preparations
- the subframe is a preset subframe of the repeated transmission preamble sequence, and the n preset subframes and the p preset subframes may be the same subframe, or may be different subframes.
- the two resource locations in the same sub-frame may be preset as positions for the preamble sequence to be repeated n times. And the position used for the preamble sequence to be repeated p times.
- the subframe in which the preamble sequence is repeated n times and the preamble sequence is repeated p times is the same subframe; correspondingly, if one subframe contains only one for transmitting the preamble sequence
- the available resource location may be preset to a position where the preamble sequence is repeated n times or a position where the preamble sequence is repeated p times. In this case, the preamble sequence is repeated n times and the preamble sequence is repeated p times of the subframe. For different sub-frames.
- the user equipment transmits the preamble sequence to the base station in subframe 1 in the first frame and subframe 5 in the first frame, if the corresponding correspondence from the base station is not received,
- the response message of the preamble sequence, the user equipment in subframe 3 in the second frame, subframe 5 in the second frame, subframe 7 in the second frame, and subframe 9 in the second frame respectively Send the preamble sequence to the base station once.
- the foregoing schematic structure of the preset PRACH is only an exemplary embodiment of the present invention.
- the preset PRACH provided by the present invention that is, the present invention provides
- the preset resource location of the preset PRACH can be adaptively adjusted according to actual requirements, and the present invention is not limited.
- the foregoing transmission method of the preamble sequence and the other implementation method of the preamble transmission method provided by the embodiments of the present invention are applicable to the FDD system and TDD (Time Divisi on Dup l ex , time division multiplexing) ) System.
- the embodiment of the present invention further provides another implementation manner of a method for transmitting a preamble sequence.
- the former in the prior art The pilot sequences are cascaded to form a new preamble sequence, and the preset resource locations of the preset PRACH are preset as consecutive subframes for transmitting a new preamble sequence.
- a new preamble sequence is constructed after cascading two 2 millisecond preamble sequences of the prior art.
- the length of the CP and the guard time in each of the 2 millisecond preamble sequences in the new preamble sequence remains unchanged, that is, the radius of the coverage of the base station supported by the new preamble sequence is 2 milliseconds.
- the preamble sequence supports the same radius of coverage of the base station.
- the preset PRACH provided by the embodiment of the present invention includes two preset radio frames of 10 milliseconds
- each subframe of each 10 millisecond radio frame can be preset.
- the opportunity to send a 1 millisecond preamble sequence is preset in the first time.
- a 2 millisecond preamble sequence can be preset to be transmitted once every two consecutive subframes of each 10 millisecond radio frame.
- a new preamble sequence is constructed by combining the 7 millisecond preamble sequences of the prior art.
- the guard time is 7 times of the preamble, CP, and guard time in the 1 millisecond preamble sequence, that is, the radius of the coverage of the base station supported by the new preamble sequence is greater than 1 millisecond due to the increased CP and guard time.
- the radius of coverage of the base station supported by the preamble sequence is constructed by combining the 7 millisecond preamble sequences of the prior art.
- preamble transmission method need to define a signal format of a new preamble sequence, and preset a preset resource location of the preset PRACH as a continuous subframe to send a new subframe. Lead sequence.
- this implementation is only applicable to FDD systems.
- a method for transmitting a preamble sequence by acquiring system information broadcasted by a base station or a physical broadcast channel PBCH, the system information or the PBCH includes a preset physical random access channel PRACH, and the preset PRACH includes a preset m a radio frame, where m is a positive integer; determining that the number of repetitions of the preamble sequence for random access on the preset resource location of the preset PRACH is n times, where ln 1 0m; n pre-presets in the PRACH Let the preamble sequence be sent to the base station at the resource location.
- the user equipment sends the preamble sequence to the base station at the n preset resource locations of the preset PRACH, that is, the user equipment sends the The number of repetitions of the preamble sequence of the base station is increased. Therefore, the signal strength of the preamble sequence received by the base station is enhanced, so that the preamble sequence can be correctly matched, thereby improving the matching probability of the base station and the efficiency of the user equipment accessing the cell.
- the embodiment of the present invention provides a user equipment 4, including: a first receiving unit 40, configured to acquire system information or a PBCH broadcasted by a base station, where the system information or the PBCH includes a preset PRACH, where The preset PRACH includes preset m radio frames, where m is a positive integer.
- the first processing unit 41 is configured to determine that the number of repetitions of the preamble sequence for random access on the preset resource location of the preset PRACH is n times, where, l n 10m.
- the first sending unit 42 is configured to send the preamble sequence to the base station at the n preset resource locations of the preset PRACH.
- the first processing unit 41 is specifically configured to determine, according to the system information or the PBCH, that the number of repetitions of the preamble sequence on the preset resource location of the preset PRACH is n times.
- the first receiving unit 40 is specifically configured to receive the downlink reference signal sent by the base station
- the first processing unit 41 is specifically configured to determine, according to the downlink reference signal, the preamble sequence in the The number of repetitions of the preset resource location of the preset PRACH is n times.
- the first processing unit 41 is specifically configured to determine, according to a pre-defined wireless communication protocol, that the preamble sequence is repeated n times on the preset resource location of the preset PRACH.
- the first processing unit 41 is further configured to select, according to the system information or the PBCH, a preamble sequence for random access among a plurality of available preamble sequences.
- the first sending unit 42 is specifically configured to send the preamble sequence to the base station at n preset resource locations of the m radio frames preset in the preset PRACH.
- the first sending unit 42 is specifically configured to send the preamble sequence to the base station in n preset subframes of the preset m radio frames in the preset PRACH.
- the embodiment of the present invention includes a preamble sequence of 1 millisecond and a preset PRACH.
- the first sending unit 42 is specifically configured to: if the user equipment sends the preamble sequence to the base station If the number of repetitions is 2, the preamble sequence is sent to the base station once in the subframe 1 in the first frame and the subframe 5 in the first frame, or the first sending unit 42 transmitting the preamble sequence to the base station once in the subframe 9 in the first frame and the subframe 1 in the second frame, or the first transmitting unit 42 is in the second The preamble sequence is transmitted to the base station once in the subframe 5 in the frame and the subframe 9 in the second frame.
- the first sending unit 42 is specifically configured to: if the number of repetitions of the preamble sequence sent by the user equipment to the base station is four, in the subframe No. 3 in the first frame, in the first frame The subframe 7 is transmitted, the subframe 3 in the second frame, and the subframe 7 in the second frame are transmitted to the base station once.
- the embodiment of the present invention takes the preamble sequence of 1 millisecond and the preset PRACH including the preset two consecutive radio frames of 10 ms as an example, and corresponds to another preset PRACH provided by the embodiment of the present invention.
- the first sending unit 42 is specifically configured to: if the number of repetitions of the preamble sequence sent by the user equipment to the base station is 2, the subframe 9 in the first frame and the first subframe in the second frame The frame transmits the preamble sequence to the base station once.
- the first sending unit 42 is specifically configured to: if the number of repetitions of the preamble sequence sent by the user equipment to the base station is four times, in the first subframe and the first frame in the first frame
- the subframe 3, the subframe 5 in the first frame, and the subframe 7 in the first frame respectively transmit the preamble sequence to the base station, or the first transmitting unit 42
- the third subframe in the second frame, the fifth subframe in the second frame, the seventh subframe in the first frame, and the subframe 9 in the second frame are respectively transmitted.
- the preamble sequence is sent to the base station once.
- the foregoing schematic structure of the preset PRACH is only an exemplary embodiment of the present invention.
- the preset PRACH provided by the present invention that is, the present invention provides
- the preset resource location of the preset PRACH can be adaptively adjusted according to actual requirements, and the present invention is not limited.
- the embodiment of the invention further provides another implementation manner of the transmission method of the preamble sequence, which includes:
- the first sending unit 42 is configured to: n preset resource bits in the preset PRACH After the sending of the preamble sequence to the base station, if the first receiving unit 40 does not receive a response message from the base station, the first sending unit 42 is further configured to be in the preset PRACH. Transmitting the preamble sequence to the base station at p preset resource locations, where ⁇ > ⁇ .
- the first sending unit 42 is configured to use the first subframe in the first frame and the fifth in the first frame. After the subframe transmits the preamble sequence to the base station once, respectively, if the first receiving unit 40 does not receive the response message from the base station corresponding to the preamble sequence, the first sending The unit 42 is further configured to use the third subframe in the second frame, the fifth subframe in the second frame, the subframe 7 in the second frame, and 9 in the second frame. The number sub-frame transmits the preamble sequence to the base station once.
- the user equipment provided by the embodiment of the present invention obtains the system information broadcasted by the base station or the physical broadcast channel PBCH, and the system information or the PBCH includes a preset physical random access channel (PRACH), and the preset PRACH includes preset m radio frames.
- PRACH physical random access channel
- m is a positive integer; determining that the number of repetitions of the preamble sequence for random access on the preset resource location of the preset PRACH is n times, where ln 10m; at the n preset resource locations of the preset PRACH Send the preamble sequence to the base station.
- the user equipment sends the preamble sequence to the base station at the n preset resource locations of the preset PRACH, that is, the number of repetitions of the preamble sequence sent by the user equipment to the base station increases, so that the preamble sequence received by the base station is The signal strength is enhanced, so that the preamble sequence can be correctly matched, thereby improving the matching probability of the base station and the efficiency of the user equipment accessing the cell.
- an embodiment of the present invention provides a base station 5, including:
- the second sending unit 50 is configured to broadcast system information or a PBCH, where the system information or the PBCH includes a preset PRACH, and the preset PRACH includes a preset m radio frames, where m is a positive integer.
- the second receiving unit 51 is configured to receive, on the n preset resource locations of the preset PRACH, k preamble sequences from the user equipment, where the k preamble sequences are used by the user equipment to determine a preamble for random access. After the number of repetitions of the sequence on the preset resource location of the preset PRACH is n, the sequence is sent on the n preset resource locations of the preset PRACH, where 1 n 10m, kn.
- the second sending unit 50 is further configured to send a downlink reference signal to The user equipment is configured to determine, according to the received downlink reference signal, that the number of repetitions of the preamble sequence on the preset resource location of the preset PRACH is n times.
- the second receiving unit 51 is specifically configured to receive k preamble sequences from the user equipment at n preset resource locations of the m radio frames preset in the preset PRACH.
- the second receiving unit 51 is specifically configured to receive k preamble sequences from the user equipment in n preset subframes of the preset m radio frames in the preset PRACH.
- the base station 5 provided by the embodiment of the present invention further includes:
- the second processing unit 52 is configured to superimpose the signal strengths of the k preamble sequences received by the second receiving unit 51, and compare the signal strengths of the superposed k preamble sequences with a preset intensity threshold.
- the second sending unit 50 is further configured to: if the signal strength of the k preamble sequences superimposed by the second processing unit 52 is greater than or equal to a preset strength threshold, returning corresponding to the k preamble sequences Response message to the user device.
- the embodiment of the present invention provides a base station, which includes a preset PRACH by using broadcast system information or a PBCH, system information or a PBCH, where the preset PRACH includes a preset m radio frames, where m is a positive integer;
- the k preamble sequences are received from the user equipment, and the k preamble sequences are the number of repetitions of the user equipment determining the preamble sequence for random access at the preset resource location of the preset PRACH. After n times, it is sent on n preset resource locations of the preset PRACH.
- the user equipment sends the preamble sequence to the base station at the n preset resource locations of the preset PRACH, that is, the number of repetitions of the preamble sequence sent by the user equipment to the base station increases, so that the preamble sequence received by the base station is The signal strength is enhanced, so that the preamble sequence can be correctly matched, thereby improving the matching probability of the base station and the efficiency of the user equipment accessing the cell.
- the embodiment of the present invention provides a user equipment 4, including: a first receiver 44, configured to acquire system information or a PBCH broadcast by a base station, where the system information or the PBCH includes a preset PRACH,
- the preset PRACH includes preset m radio frames, where m is a positive integer.
- a first processor 45 configured to determine a preamble sequence for random access at the preset
- the number of repetitions of the PRACH preset resource location is n times, where ln 10m.
- the first transmitter 46 is configured to send the preamble sequence to the base station at n preset resource locations of the preset PRACH.
- the first processor 45 is specifically configured to determine, according to the system information or the PBCH, that the number of repetitions of the preamble sequence at the preset resource location of the preset PRACH is n times.
- the first receiver 44 is configured to receive the downlink reference signal sent by the base station, and the first processor 45 is specifically configured to determine, according to the downlink reference signal, the preamble sequence in the The number of repetitions on the preset resource location of the preset PRACH is n times.
- the first processor 45 is specifically configured to determine, according to a pre-defined wireless communication protocol, that the preamble sequence has a repetition number of times at a preset resource location of the preset PRACH.
- the first processor 45 is further configured to select, according to the system information or the PBCH, a preamble sequence for random access among a plurality of available preamble sequences.
- the first transmitter 46 is specifically configured to send the preamble sequence to the base station at n preset resource locations of m radio frames preset in the preset PRACH.
- the first transmitter 46 is specifically configured to send the preamble sequence to the base station in n preset subframes of the m radio frames preset in the preset PRACH.
- the embodiment of the present invention takes a preamble sequence of 1 millisecond and a preset PRACH including preset two consecutive radio frames of 10 ms as an example, corresponding to a preset PRACH provided by the embodiment of the present invention.
- the first transmitter 46 is specifically configured to: if the number of repetitions of the preamble sequence sent by the user equipment to the base station is two, the subframe 1 in the first frame and the subframe 5 in the first frame respectively Transmitting the preamble sequence to the base station once, or transmitting the preamble sequence to the base station once in subframe 9 in the first frame and subframe 1 in the second frame, or The preamble sequence is transmitted to the base station once in subframe 5 in the second frame and subframe 9 in the second frame.
- the first transmitter 46 is specifically configured to: if the number of repetitions of the preamble sequence sent by the user equipment to the base station is four, in the subframe No. 3 in the first frame, in the first frame The subframe 7 is transmitted, the subframe 3 in the second frame, and the subframe 7 in the second frame are transmitted to the base station once.
- the embodiment of the present invention takes the preamble sequence of 1 millisecond and the preset PRACH including the preset two consecutive radio frames of 10 ms as an example, and corresponds to another preset PRACH provided by the embodiment of the present invention.
- the first transmitter 46 is specifically configured to: if the number of repetitions of the preamble sequence sent by the user equipment to the base station is 2, the subframe 9 in the first frame and the subframe 1 in the second frame The preamble sequence is sent to the base station once.
- the first transmitter 46 is specifically configured to: if the number of repetitions of the preamble sequence sent by the user equipment to the base station is four, in the first subframe and the first frame in the first frame
- the subframe 3, the subframe 5 in the first frame, and the subframe 7 in the first frame respectively transmit the preamble sequence to the base station once, or in the second frame
- the subframe 3, the subframe 5 in the second frame, the subframe 7 in the second frame, and the subframe 9 in the first frame are respectively transmitted once to the preamble sequence to The base station.
- the foregoing schematic structure of the preset PRACH is only an exemplary embodiment of the present invention.
- the preset PRACH provided by the present invention that is, the present invention provides
- the preset resource location of the preset PRACH can be adaptively adjusted according to actual requirements, and the present invention is not limited.
- the embodiment of the invention further provides another implementation manner of the transmission method of the preamble sequence, which includes:
- the first transmitter 46 is configured to send the preamble sequence to the base station after n preset resource locations of the preset PRACH, if the first receiver 44 does not receive the base station from the base station.
- the first transmitter 46 is further configured to send the preamble sequence to the base station at p preset resource locations of the preset PRACH, where p>n.
- the first transmitter 46 is configured to use the first subframe in the first frame and the fifth in the first frame. After the subframe transmits the preamble sequence to the base station once, respectively, if the first receiver 44 does not receive the response message from the base station corresponding to the preamble sequence, the first sending The processor 46 is further configured to use the subframe 3 in the second frame, the subframe 5 in the second frame, the subframe 7 in the second frame, and the 9 in the second frame. The number sub-frame transmits the preamble sequence to the base station once.
- the user equipment provided by the embodiment of the present invention obtains the system information broadcasted by the base station or the physical broadcast channel PBCH, and the system information or the PBCH includes a preset physical random access channel (PRACH), and the preset PRACH includes preset m radio frames.
- PRACH physical random access channel
- m is a positive integer
- Determining the number of repetitions of the preamble sequence for the random access on the preset resource location of the preset PRACH is n times, where ln 10m; transmitting the preamble sequence to the base station at the n preset resource locations of the preset PRACH.
- the user equipment sends the preamble sequence to the base station at the n preset resource locations of the preset PRACH, that is, the number of repetitions of the preamble sequence sent by the user equipment to the base station increases, so that the preamble sequence received by the base station is The signal strength is enhanced, so that the preamble sequence can be correctly matched, thereby improving the matching probability of the base station and the efficiency of the user equipment accessing the cell.
- an embodiment of the present invention provides a base station 5, including:
- the second transmitter 53 is configured to broadcast system information or a PBCH, and the system information or the PBCH includes a preset PRACH, where the preset PRACH includes a preset m radio frames, where m is a positive integer.
- the second receiver 54 is configured to receive, on the n preset resource locations of the preset PRACH, k preamble sequences from the user equipment, where the k preamble sequences are used by the user equipment to determine a preamble for random access. After the number of repetitions of the sequence on the preset resource location of the preset PRACH is n, the sequence is sent at n preset resource locations of the preset PRACH, where Kn ⁇ 10m, kn.
- the second transmitter 53 is further configured to send a downlink reference signal, so that the user equipment determines, according to the received downlink reference signal, a preset resource of the preamble sequence in the preset PRACH.
- the number of repetitions in the position is n times.
- the second receiver 54 is specifically configured to receive k preamble sequences from the user equipment on n preset resource locations of the m radio frames preset in the preset PRACH.
- the second receiver 54 is specifically configured to receive k preamble sequences from the user equipment in n preset subframes of the m radio frames preset in the preset PRACH.
- the base station 5 provided by the embodiment of the present invention further includes:
- the second processor 55 is configured to superimpose the signal strengths of the k preambles received by the second receiver 54 and compare the signal strengths of the superposed k preamble sequences with a preset intensity threshold.
- the second transmitter 53 is further configured to: if the signal strength of the k preamble sequences superimposed by the second processor 55 is greater than or equal to a preset intensity threshold, return corresponding to the Sending a response message of k preamble sequences to the user equipment.
- the embodiment of the present invention provides a base station, which includes a preset PRACH by using broadcast system information or a PBCH, system information or a PBCH, where the preset PRACH includes a preset m radio frames, where m is a positive integer;
- the k preamble sequences are received from the user equipment, and the k preamble sequences are the number of repetitions of the user equipment determining the preamble sequence for random access at the preset resource location of the preset PRACH. After n times, it is sent on n preset resource locations of the preset PRACH.
- the user equipment sends the preamble sequence to the base station at the n preset resource locations of the preset PRACH, that is, the number of repetitions of the preamble sequence sent by the user equipment to the base station increases, so that the preamble sequence received by the base station is The signal strength is enhanced, so that the preamble sequence can be correctly matched, thereby improving the matching probability of the base station and the efficiency of the user equipment accessing the cell.
- an embodiment of the present invention provides a transmission system 6 for a preamble sequence, including:
- the transmission system of the preamble sequence acquires the system information or the PBCH broadcasted by the base station by using the user equipment, where the system information or the PBCH includes a preset PRACH and a plurality of preamble sequences, where the preset PRACH includes a preset m a radio frame, where m is a positive integer; the user equipment determines that the number of repetitions of the preamble sequence for random access on the preset resource location of the preset PRACH is n times, where ln 10m; Transmitting the preamble sequence to the base station at n preset resource locations of the preset PRACH, so that after the base station superimposes and matches the received k preamble sequences, it returns a corresponding to the k preamble sequences.
- the user equipment sends the preamble sequence to the base station at the n preset resource locations of the preset PRACH, that is, the number of repetitions of the preamble sequence sent by the user equipment to the base station increases, so that the preamble sequence received by the base station is The signal strength is enhanced, so that the preamble sequence can be correctly matched, thereby improving the matching probability of the base station and the efficiency of the user equipment accessing the cell.
- inventive arrangements may be described in the general context of computer-executable instructions executed by a computer, such as a program element.
- program units include routines, programs, objects, components, data structures, and the like that perform particular tasks or implement particular abstract data types.
- inventive arrangements can also be practiced in distributed computing environments where tasks are performed by remote processing devices that are connected through a communication network.
- the program unit can be located in both local and remote computer storage media including storage devices.
- the same or similar parts may be referred to each other, and each embodiment focuses on differences from other embodiments.
- the description since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method embodiment.
- the device embodiments described above are merely illustrative, wherein 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, ie may be located One place, or it can be distributed to multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without any creative effort.
- the disclosed systems, devices, and methods may be implemented in other ways.
- the device embodiments described above are merely illustrative.
- the division of the unit is only a logical function division.
- there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
- the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
- 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, ie may be located One place, or it can be distributed to multiple network elements. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
- each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
- the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
- the technical solution of the present invention which is essential to the prior art or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, including
- the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
- the foregoing storage medium includes: a USB flash drive, a removable hard disk, a read-only memory (ROM), a random access memory (RAM, Random Acce ss Memory), a magnetic disk, or an optical disk, and the like, which can store program codes. Medium.
- the present invention can be implemented by means of software plus necessary general hardware including general-purpose integrated circuits, general-purpose CPUs, general-purpose memories, general-purpose components, and the like.
- general-purpose integrated circuits general-purpose CPUs
- general-purpose memories general-purpose components
- dedicated hardware including an application specific integrated circuit, a dedicated CPU, a dedicated memory, a dedicated component, etc., but in many cases, the former is a better implementation.
- the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer.
- a hard disk or optical disk, etc. includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods of various embodiments of the present invention.
- a computer device which may be a personal computer, server, or network device, etc.
- the above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.
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Abstract
本发明实施例提供一种前导序列的传输方法、装置及系统,涉及通信领域,能够增强基站接收到的前导序列信号强度,从而提高基站的匹配概率,以及用户设备接入基站的效率。该方法包括:获取基站广播的系统信息或者物理广播信道PBCH,所述系统信息或者所述PBCH包括预设物理随机接入信道PRACH,所述预设PRACH包括预设的m个无线帧,其中,m为正整数;确定用于随机接入的前导序列在所述预设PRACH的预设资源位置上的重复次数为n次,其中,1≤n≤10m;在所述预设PRACH的n个预设资源位置上发送所述前导序列至所述基站。
Description
一种前导序列的传输方法、 装置及系统
本申请要求了于 2013年 1月 7日提交中国专利局,申请号为 201310005017.1、 发明名称为 "一种前导序列的传输方法、 装置及系统" 的中国申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域 本发明涉及通信领域, 尤其涉及一种前导序列的传输方法、 装置及 系统。 背景技术
随着通信系统的不断发展及完善, 人们对通信质量的要求也越来 越高, 即希望不仅能在地面或露天场所进行通信, 而且也能在地下室等 比较隐蔽的地方很好的进行通信。
目前, 一个无线帧由 1 0个子帧组成, 1 0个子帧分别以 0号子帧、
1号子帧、 2号子帧 9号子帧来进行编号。 以 1 0毫秒的一个无 线帧为例, 该无线帧的每个子帧均为 1毫秒, 若前导序列也为 1毫秒, 则该无线帧的每个子帧可发送一个前导序列。
现有技术中, 用户设备随机接入基站的过程是用户设备实现上行 同步, 并且与基站建立连接的第一步。在用户设备随机接入基站的过程 中, 用户设备通过随机选择一个来自基站的前导序列, 并将该前导序列 发送至基站,以使得基站将接收到的前导序列的强度与基站的预设强度 阔值匹配正确后,发送响应消息响应该用户设备,从而使得用户设备能 够接入基站。 然而, 由于位于地下室的用户设备或者其他链路损耗较大的用户设 备发送的前导序列在传输过程中有较大的损耗, 因此, 导致基站无法正 确接收该前导序列或接收到的前导序列信号强度较低, 从而无法正确匹 配该前导序列,若用户设备在预定的时间内未收到来自基站的响应消息, 用户设备则会选择另一个随机接入信道发送重新选择的前导序列至基 站, 这就使得用户设备会不断发送随机选择的前导序列至基站, 而基站
仍然无法正确匹配, 从而导致基站的匹配概率以及用户设备接入基站的 效率降低。 发明内容 本发明的实施例提供一种前导序列的传输方法、 装置及系统, 能 够增强基站接收到的前导序列信号强度,从而提高基站的匹配概率, 以 及用户设备接入基站的效率。
为达到上述目的, 本发明的实施例釆用如下技术方案:
第一方面, 本发明实施例提供了一种前导序列的传输方法, 包括: 获取基站广播的系统信息或者物理广播信道 PBCH , 所述系统信息 或者所述 PBCH 包括预设物理随机接入信道 PRACH , 所述预设 PRACH 包 括预设的 m个无线帧, 其中, m为正整数;
确定用于随机接入的前导序列在所述预设 PRACH 的预设资源位置 上的重复次数为 n次, 其中, l n 10m;
在所述预设 PRACH 的 n个预设资源位置上发送所述前导序列至所 述基站。
在第一方面的第一种可能的实现方式中, 所述确定用于随机接入 的前导序列在所述预设 PRACH的预设资源位置上的重复次数为 n次的方 法具体包括:
根据所述系统信息或者所述 PBCH , 确定所述前导序列在所述预设 PRACH的预设资源位置上的重复次数为 n次;
或者,
接收所述基站发送的下行参考信号, 以及根据所述下行参考信号, 确定所述前导序列在所述预设 PRACH的预设资源位置上的重复次数为 n 次;
或者,
根据预先制定的无线通信协议, 确定所述前导序列在所述预设 PRACH的预设资源位置上的重复次数为 n次。
结合第一方面或第一方面的第一种可能的实现方式, 在第二种可 能的实现方式中 ,所述在所述预设 PRACH的 n个预设资源位置上发送所
述前导序列至所述基站包括:
在所述预设 PRACH 中预设的 m个无线帧中的 n个预设子帧内发送 所述前导序列至所述基站。
结合第一方面或第一方面的第一种可能的实现方式至第二种可能 的实现方式中的任一种实现方式, 在第三种可能的实现方式中, 所述在 所述预设 PRACH的 n个预设资源位置上发送所述前导序列至所述基站之 后, 还包括:
若未接收到来自所述基站的响应消息, 则在所述预设 PRACH 的 p 个预设资源位置上发送所述前导序列至所述基站, 其中, p>n。
第二方面, 本发明实施例还提供了一种前导序列的传输方法, 包 括:
广播系统信息或者 PBCH , 所述系统信息或者所述 PBCH 包括预设 PRACH , 所述预设 PRACH包括预设的 m个无线帧, 其中, m为正整数; 在所述预设 PRACH 的 n个预设资源位置上接收来自用户设备的 k 个前导序列,所述 k个前导序列为所述用户设备在确定用于随机接入的 前导序列在所述预设 PRACH的预设资源位置上的重复次数为 n次后,在 所述预设 PRACH 的 n个预设资源位置上发送的, 其中, l n 1 0m , k n。
在第二方面的第一种可能的实现方式中, 所述在所述预设 PRACH 的 n个预设资源位置上接收来自用户设备的 k个前导序列之前,所述方 法还包括:
发送下行参考信号, 以使得所述用户设备根据接收到的所述下行 参考信号,确定所述前导序列在所述预设 PRACH的预设资源位置上的重 复次数为 n次。
结合第二方面或第二方面的第一种可能的实现方式, 在第二种可 能的实现方式中 ,所述在所述预设 PRACH的 n个预设资源位置上接收来 自用户设备的 k个前导序列包括:
在所述预设 PRACH 中预设的 m个无线帧中的 n个预设子帧内接收 来自所述用户设备的 k个前导序列。
第三方面, 本发明实施例提供一种用户设备, 包括:
第一接收单元, 用于获取基站广播的系统信息或者 PBCH , 所述系 统信息或者所述 PBCH 包括预设 PRACH , 所述预设 PRACH 包括预设的 m 个无线帧, 其中, m为正整数;
第一处理单元, 用于确定用于随机接入的前导序列在所述预设 PRACH的预设资源位置上的重复次数为 n次, 其中, l n 10m;
第一发送单元, 用于在所述预设 PRACH 的 n个预设资源位置上发 送所述前导序列至所述基站。
在第三方面的第一种可能的实现方式中, 所述第一处理单元, 具 体用于根据所述系统信息或者所述 PBCH , 确定所述前导序列在所述预 设 PRACH的预设资源位置上的重复次数为 n次;
或者,
所述第一接收单元, 具体用于接收所述基站发送的下行参考信号, 以及所述第一处理单元, 具体用于根据所述下行参考信号,确定所述前 导序列在所述预设 PRACH的预设资源位置上的重复次数为 n次;
或者,
所述第一处理单元, 具体用于根据预先制定的无线通信协议, 确 定所述前导序列在所述预设 PRACH 的预设资源位置上的重复次数为 n 次。
结合第三方面或第三方面的第一种可能的实现方式, 在第二种可 能的实现方式中, 所述第一发送单元, 具体用于在所述预设 PRACH中预 设的 m个无线帧中的 n个预设子帧内发送所述前导序列至所述基站。
结合第三方面或第三方面的第一种可能的实现方式至第二种可能 的实现方式中的任一种实现方式, 在第三种可能的实现方式中, 所述第 一发送单元,用于在所述预设 PRACH的 n个预设资源位置上发送所述前 导序列至所述基站之后,若所述第一接收单元未接收到来自所述基站的 响应消息,则所述第一发送单元还用于在所述预设 PRACH的 p个预设资 源位置上发送所述前导序列至所述基站, 其中, p>n。
第四方面, 本发明实施例提供一种基站, 包括:
第二发送单元, 用于广播系统信息或者 PBCH , 所述系统信息或者 所述 PBCH包括预设 PRACH , 所述预设 PRACH包括预设的 m个无线帧,
其中, m为正整数;
第二接收单元, 用于在所述预设 PRACH 的 n个预设资源位置上接 收来自用户设备的 k个前导序列,所述 k个前导序列为所述用户设备在 确定用于随机接入的前导序列在所述预设 PRACH 的预设资源位置上的 重复次数为 n次后, 在所述预设 PRACH的 n个预设资源位置上发送的, 其中, 1 n 1 0m , k n。
在第四方面的第一种可能的实现方式中, 所述第二发送单元, 还 用于发送下行参考信号,以使得所述用户设备根据接收到的所述下行参 考信号,确定所述前导序列在所述预设 PRACH的预设资源位置上的重复 次数为 n次。
结合第四方面或第四方面的第一种可能的实现方式, 在第二种可 能的实现方式中, 所述第二接收单元, 具体用于在所述预设 PRACH中预 设的 m个无线帧中的 n个预设子帧内接收来自所述用户设备的 k个前导 序列。
第五方面, 本发明实施例提供一种前导序列的传输系统, 包括: 以上第三方面所述的用户设备和以上第四方面所述的基站。
本发明实施例提供一种前导序列的传输方法、 装置及系统, 包括: 获取基站广播的系统信息或者物理广播信道 PBCH , 所述系统信息或者所 述 PBCH包括预设物理随机接入信道 PRACH , 所述预设 PRACH包括预设的 m 个无线帧, 其中, m为正整数; 确定用于随机接入的前导序列在所述预设
PRACH的预设资源位置上的重复次数为 n次, 其中, l n 1 0m; 在所述预 设 PRACH的 n个预设资源位置上发送所述前导序列至所述基站。 通过该方 案, 由于用户设备在预设 PRACH的 n个预设资源位置上发送前导序列至基 站, 即用户设备发送至基站的前导序列的重复次数增加, 因此, 以使得 基站接收到的前导序列的信号强度增强,从而可以正确匹配该前导序列, 进而提高基站的匹配概率, 以及用户设备接入小区的效率。
附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面
将对实施例或现有技术描述中所需要使用的附图作简单地介绍,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的前提下,还可以根据这些附图获 得其他的附图。
图 1为现有技术提供的 PRACH的结构示意图;
图 2 为本发明实施例提供的一种前导序列的传输方法的方法流程 图一;
图 3为本发明实施例提供的前导序列的结构示意图一;
图 4为本发明实施例提供的前导序列的结构示意图二;
图 5为本发明实施例提供的前导序列的结构示意图三;
图 6 为本发明实施例提供的一种前导序列的传输方法的方法流程 图二;
图 7 为本发明实施例提供的一种前导序列的传输方法的方法流程 图三;
图 8为本发明实施例提供的预设 PRACH的结构示意图一; 图 9为本发明实施例提供的预设 PRACH的结构示意图二; 图 1 0为本发明实施例提供的预设 PRACH的结构示意图三; 图 1 1为本发明实施例提供的前导序列的结构示意图四;
图 1 2为本发明实施例提供的前导序列的结构示意图五;
图 1 3为本发明实施例提供的一种用户设备的结构示意图一; 图 1 4为本发明实施例提供的一种基站的结构示意图一;
图 1 5为本发明实施例提供的一种基站的结构示意图二;
图 1 6为本发明实施例提供的一种用户设备的结构示意图二; 图 1 7为本发明实施例提供的一种基站的结构示意图三;
图 1 8为本发明实施例提供的一种基站的结构示意图四;
图 1 9为本发明实施例提供的一种前导序列的传输系统框图。
具体实施方式 下面将结合本发明实施例中的附图, 对本发明实施例中的技术方
案进行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分 实施例, 而不是全部的实施例。 基于本发明中的实施例, 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 本发明保护的范围。
现有技术中, 用户设备随机接入基站的过程是用户设备实现上行 同步, 并且与基站建立连接的第一步, 在用户设备接入基站的过程中, 用户设备首先接收到基站广播的系统信息或 PBCH( Physical Broadcast Channel, 物理广播信道), 然后根据该系统信息或 PBCH在一个选定的 随机接入信道上发射随机选择的一个前导序列至基站后,用户设备将等 待接收来自基站的对应于该前导序列的响应消息。 若在预设时间内, 用 户设备未接收到来自基站的响应消息,用户设备则选择另一个随机接入 信道再次发送重新选择的一个前导序列至基站。
需要说明的是, 基站广播的系统信息或 PBCH 中包括 PRACH (Physical Random Access Channel , 物理随机接入信道) 及该用户设 备可用的前导序列。
如图 1所示, 为一种 PRACH, 该 PRACH可用于指示用户设备接入基 站过程中可以使用的随机接入资源,如图 1所示的该 PRACH中包括两个 10毫秒的无线帧, 即包括 20个 1毫秒的子帧, 每一帧设置有 5个发送 前导序列的机会,且前导序列的起始点与用户设备相应上行链路子帧的 起始点对齐 (假设时间提前量为 0) 。
进一步地, 对应于图 1所示的 PRACH, 时域上, 用户设备在 PRACH 设置的子帧内可发送一次前导序列至基站, 频域上, 前导序列占 6 个 PRB (Physical Resource Block, 物理资源块) 。 需要说明的是, 1个 PRB时域上包含 1个时隙, 频域上由 12个子载波构成。 特别的, 每个 子帧包含 2个时隙。
实施例一
本发明实施例提供一种前导序列的传输方法, 涉及用户设备一侧 , 如图 2所示, 包括:
S 101、用户设备获取基站广播的系统信息或者物理广播信道 PBC H , 系统信息或者 PBCH包括预设物理随机接入信道 PRACH, 预设 PRACH 包 括预设的 m个无线帧, 其中, m为正整数。
本发明实施例中, 用户设备一旦进入基站的覆盖范围内, 用户设 备则可获取到基站广播的系统信息或者 PBCH, 系统信息或者 PBCH中包 括预设 PRACH, 以及用户设备可用的多个前导序列, 预设 PRACH和可用 的前导序列均是用户设备接入基站的必要条件。
预设 PRACH包括预设的 m个无线帧, 其中, m为正整数, 即 m的取 值可以为 1、 2、 3......等, 本发明不做限制。
S102、 用户设备确定用于随机接入的前导序列在预设 PRACH 的预 设资源位置上的重复次数为 n次, 其中, l n 10m。
用户设备可根据获取到的来自基站的系统信息或者 PBCH, 在多个 前导序列中随机选择一个用于随机接入的前导序列, 以及, 用户设备可 按照预设规则, 确定用于其随机接入基站的该前导序列在预设 PRACH 的预设资源位置上的重复次数为 n次, 其中, l n 10m。
如图 3所示, 为前导序列的信号格式, 包括 CP ( Cyclic Prefix, 循环前缀)、 前导以及保护时间。 在 FDD ( Frequency Division Duplex, 频分复用)系统中, 定义了三种前导序列的信号格式, 分别为 1毫秒的 前导序列、 2毫秒的前导序列和 3毫秒的前导序列, 图 3所示的前导序 列为 1毫秒的前导序列的信号格式, 在 1毫秒的前导序列中, 前导的长 度为 0.8 毫秒, CP的长度以及保护时间的长度分别为 0.1 毫秒; 图 4 所示的前导序列为 2毫秒的前导序列的信号格式,在 1毫秒的前导序列 中, 前导的长度为 1.6毫秒, CP的长度以及保护时间的长度分别为 0.2 毫秒; 图 5所示的前导序列为 3毫秒的前导序列的信号格式, 在 3毫秒 的前导序列中, 前导的长度为 1.6 毫秒, CP的长度以及保护时间的长 度分别为 0.7毫秒。
需要说明的是, 不同的前导序列应用于不同的场景中, 可根据基 站覆盖范围的不同进行选择, 一般的, CP 的长度越长, 则能够适用于 往返时延越大的情况, 即能支持更大的基站覆盖范围; 前导的长度主要 影响基站对前导序列的接收质量,更长的前导意味着基站能够获得更好 的接收质量, 从而获得较好的解调性能。
特别的, 本发明实施例的前导序列的信号格式可以为 1 毫秒, 也 可以为 2毫秒, 还可以为 3毫秒等其他任意满足设计要求的前导序列, 本发明不做限制。
示例性的, 以本发明实施例提供的前导序列为 1 毫秒为例, 若预 设 PRACH包括预设的 1个 10毫秒的无线帧,在预设的每个 10毫秒无线 帧的每个子帧内均可以发送 1次前导序列, 这种情况下, 用户设备在预 设的 2个 10毫秒的无线帧内发送至基站的前导序列的重复次数最多可 以为 20次。优选地,若用户设备发送至基站的前导序列的重复次数为 2X 次, 其中, X为正整数, 且 2 2X 20 , 则在 2个 10毫秒的无线帧内, 用户设备发送至基站的前导序列的重复次数分别可以为 2'次(即 2次)、 22次 (即 4次) 、 23次 (即 8次) 或 24次 (即 16次) ; 同样的, 若预 设 PRACH包括预设的 4个 1 0毫秒的无线帧, 则优选地, 用户设备发送 至基站的前导序列的重复次数最多可以为 25次 (即 32次) 。
当然, 若本发明实施例提供的前导序列为 2 毫秒, 在预设 PRACH 的预设的两个 10毫秒无线帧内, 用户设备可在每两个子帧内发送 1次 前导序列至基站, 即, 在 2个无线帧内, 用户设备发送至基站的前导序 列的重复次数最多可以为 1 0次。 优选地, 用户设备发送至基站的前导 序列的重复次数分别可以为 2次、 4次或 8次。
S 103、 用户设备在该预设 PRACH 的 n个预设资源位置上发送前导 序列至基站。
用户设备可在预设 PRACH 的 n个预设资源位置上发送前导序列至 基站, 以使得基站在对接收到的所有相同的前导序列进行叠加并匹配 后, 返回对应于该前导序列的响应消息, 从而以使用户设备接入基站。
本发明实施例提供一种前导序列的传输方法, 涉及基站侧, 如图 6 所示, 包括:
S20 基站广播系统信息或者 PBCH , 系统信息或者 PBCH包括预设 PRACH , 预设 PRACH包括预设的 m个无线帧, 其中, m为正整数。
基站在其覆盖的范围内, 周期性的广播系统信息或者 PBCH , 系统 信息或者 PBCH包括预设 PRACH以及用户设备可用的多个前导序列, 预 设 PRACH包括预设的 m个无线帧, 其中, m为正整数, 即 m的取值可以 为 1、 2、 3... ...等, 本发明不做限制。
S202、 基站在预设 PRACH 的 n个预设资源位置上接收来自用户设 备的 K个前导序列, 其中, l n 10m, k n。
基站在预设 PRACH 的 n个预设资源位置上接收来自用户设备的 k
个前导序列, k个前导序列为用户设备根据获取到的基站广播的系统信 息或者 PBCH , 在基站广播的多个用户设备可用前导序列中选择的, 并 按照预设规则,在确定用于随机接入的前导序列在预设 PRACH的预设资 源位置上的重复次数为 n次后,在预设 PRACH的 n个预设资源位置上发 送的, 其中, 1 n 10m , k n。
特别的, 本发明实施例提供的前导序列的信号格式可以为 1毫秒, 也可以为 2毫秒,还可以为 3毫秒等其他任意满足要求的前导序列, 本 发明不做限制。
需要说明的是, 本发明实施例提供的用户设备侧的前导序列的传 输方法与基站侧的前导序列的传输方法是相互对应的,即用户设备在预 设 PRACH的 n个预设资源位置上发送前导序列,基站则在该 n个预设资 源位置上接收该前导序列。
本领域技术人员可以理解, 由于前导序列在传输过程中可能会有 传输失败的现象, 因此,基站在预设 PRACH的 n个预设资源位置上接收 到的该前导序列为 k个, 其中, k n。
本发明实施例中, 由于用户设备在预设 PRACH 的 n个预设资源位 置上发送前导序列至基站,即用户设备发送至基站的前导序列的重复次 数增加, 因此, 以使得基站接收到的前导序列的信号强度增强, 从而可 以正确匹配该前导序列, 进而提高基站的匹配概率, 以及用户设备接入 小区的效率。
示例性的,本发明假设 m=2 ,即预设 PRACH包括预设的 1个无线帧, 且前导序列为 1毫秒的前导序列。本发明实施例还提供一种前导序列的 传输方法, 如图 7所示, 包括:
S 30 基站广播系统信息或者 PBCH , 系统信息或者 PBCH包括预设 PRACH以及多个前导序列, 预设 PRACH包括预设的 1个无线帧。
基站在其覆盖的范围内, 周期性地广播系统信息或者 PBCH , 系统 信息或者 PBCH中包括预设 PRACH , 以及用户设备可用的多个前导序列 , 预设 PRACH包括预设的 2个无线帧,预设 PRACH和可用的前导序列均是 用户设备接入基站的必要条件。
S 302、 用户设备获取系统信息或者 PBCH , 并根据系统信息或者 PBCH , 在多个前导序列中选择一个用于随机接入的前导序列。
用户设备获取基站广播的系统信息或者 PBCH, 并根据获取到的系 统信息或者 PBCH, 在多个用户设备可用的前导序列中随机选择一个用 于随机接入的前导序列。
S303、 用户设备确定用于随机接入的前导序列在预设 PRACH 的预 设资源位置上的重复次数为 n次, 其中, l n 20。
示例性的, 由于假设 m=2, 则 n的取值可以为 1、 1、 3、 4
20, 也就是说, 若预设 PRACH包括预设的 2个无线帧, 则用户设备发送 至基站的前导序列的重复次数可以为 1次、 2次、 3次、 4次 或
20 次, 优选地, 用户设备发送至基站的前导序列的重复次数可以为 2 次、 4次、 8次或 16次。 具体的, 用户设备发送至基站的前导序列的重 复次数可根据实际要求及设计进行适应性调整, 本发明不做限制。
在 LTE ( Long Term Evolution, 长期演进) 系统中, 每个无线帧 一般为 10毫秒。
具体的, 用户设备按照预设规则, 确定用于随机接入的前导序列 在预设 PRACH的预设资源位置上的重复次数为 n次的方法可以为下述的 任意一种:
( 1 )用户设备根据系统信息或者 PBCH,确定前导序列在预设 PRACH 的预设资源位置上的重复次数为 n次。
用户设备可从下行接收的基站广播的系统信息或者 PBCH中获知发 送至基站的前导序列在预设 PRACH 的预设资源位置上的重复次数为 n 次。
需要说明的是, 本发明实施例中, 下行可定义为由基站向用户设 备发送信号的过程; 相反的, 上行可定义为由用户设备向基站发送信号 的过程。
( 2 ) 用户设备接收基站发送的下行参考信号, 以及根据下行参考 信号, 确定前导序列在预设 PRACH 的预设资源位置上的重复次数为 n 次。
用户设备可以根据接收到的基站发送的下行参考信号测量自己的 链路损耗,不同的链路损耗等级对应不同的前导序列在预设 PRACH的预 设资源位置上的重复次数。
示例性的, 以本发明实施例提供的前导序列为 1 毫秒为例, 由于 假设预设 PRACH包括预设的 2个 10毫秒的无线帧,在每个 10毫秒无线 帧的每个子帧内均可以发送 1次前导序列, 这种情况下, 用户设备在预 设的 2个 10毫秒的无线帧内发送至基站的前导序列的重复次数最多可 以为 20次。优选地,若用户设备发送至基站的前导序列的重复次数为 2X 次, 其中, X为正整数, 且 2 2X 20 , 则在预设的 1个 10毫秒的无线 帧内, 用户设备发送至基站的前导序列的重复次数分别可以为 21次(即 2次) 、 22次 (即 4次) 、 23次 (即 8次) 或 24次 (即 16次) 。
进一步地, 按照上述优选的用户设备发送至基站的前导序列在预 设的 2 个 10 毫秒的无线帧内的重复次数进行设定, 若链路损耗小于 50dB ,则对应的前导序列的重复次数为 4次;若链路损耗大于等于 50dB , 同时小于等于 100 dB , 则对应的前导序列的重复次数为 8次; 若链路 损耗大于等于 100 dB , 则对应的前导序列的重复次数为 16次。
( 3 ) 用户设备可根据预先制定的无线通信协议, 确定前导序列在 预设 PRACH的预设资源位置上的重复次数为 n次。
用户设备可从预先制定的无线通信协议中获知发送至基站的前导 序列在预设 PRACH的预设资源位置上的重复次数为 n次。具体的,在制 定无线通信协议时,各个运营商之间通过互相约定,设置用户设备发送 至基站的前导序列在预设 PRACH的预设资源位置上的重复次数为 n次。
S 304、 用户设备在预设 PRACH 的 n个预设资源位置上发送前导序 列至基站。
用户设备可在预设 PRACH 的 n个预设资源位置上发送前导序列至 基站。
进一步地, 用户设备可在预设 PRACH 中预设的 1个无线帧的 n个 预设资源位置上发送前导序列至基站。
进一步地, 用户设备可在预设 PRACH 中预设的 1 个无线帧中的 n 个预设子帧内发送前导序列至基站。
需要说明的是, 本发明实施例提供的预设 PRACH 的 n个预设资源 位置包括预设 PRACH中预设的 2个无线帧的 n个预设资源位置。
进一步地, 本发明实施例提供的预设 PRACH 中预设的 2个无线帧 的 n个预设资源位置具体包括预设 PRACH 中预设的 1个无线帧中的 n
个预设子帧。
示例性的, 如图 8 所示, 为本发明实施例提供的一种预设 PRACH 的结构示意图, 包括预设的连续的 2个无线帧。
若 n=2 , 即用户设备在预设的 2个无线帧的 2个预设资源位置上发 送前导序列至基站,如图 8所示, 则用户设备可以在第 1帧内的 1号子 帧和第 1帧内的 5号子帧分别发送 1次前导序列至基站, 或, 用户设备 可以在第 1帧内的 9号子帧和第 2帧内的 1号子帧分别发送 1次前导序 列至基站, 或, 用户设备可以在第 1 帧内的 5 号子帧和第二帧内的 9 号子帧分别发送 1次前导序列至基站。
若 n=4 , 即用户设备在预设的 2个无线帧的 4个预设资源位置上发 送前导序列至基站,如图 8所示, 则用户设备可以在第 1帧内的 3号子 帧、第 1帧内的 7号子帧、第 2帧内的 3号子帧以及第 2帧内的 7号子 帧分别发送 1次前导序列至基站。
示例性的, 如图 9所示, 为本发明实施例提供的另一种预设 PRACH 的结构示意图, 包括预设的连续的 2个无线帧。
若 n=2 , 即用户设备在预设的 2个无线帧的 2个预设资源位置上发 送前导序列至基站,如图 9所示, 则用户设备可以在第 1帧内的 9号子 帧和第 2帧内的 1号子帧分别发送 1次前导序列至基站。
若 n=4 , 即用户设备在预设的 2个无线帧的 4个预设资源位置上发 送前导序列至基站,如图 9所示, 则用户设备可以在第 1帧内的 1号子 帧、第 1帧内的 3号子帧、第 1帧内的 5号子帧以及第 1帧内的 7号子 帧分别发送 1 次前导序列至基站, 或, 用户设备可以在第 2 帧内的 3 号子帧、 第 2帧内的 5号子帧、 第 2帧内的 7号子帧以及第 2帧内的 9 号子帧分别发送 1次前导序列至基站。
需要说明的是, 上述预设 PRACH 的结构示意图仅是示例性的对本 发明的实施例进行说明, 本领域的普通技术人员可以理解, 本发明提供 的预设 PRACH , 也就是说, 本发明提供的预设 PRACH的预设资源位置是 可以根据实际要求进行适应性调整的, 本发明不做限制。
S 305、 基站叠加接收到的 k个前导序列的信号强度, 其中, k n。 基站在预设 PRACH 的 n个预设资源位置上接收来自用户设备的 k 个前导序列后,基站对接收到的 k个前导序列的信号强度进行叠加, 其
中, k n。
5 306、 基站将叠加后的 k 个前导序列的信号强度与预设强度阔值 进行对比。
基站将叠加后的 k 个前导序列的信号强度与预设强度阔值进行对 比,即基站将叠加后的 k个前导序列的信号强度与预设强度阔值进行匹 配。
5 307、 若叠加后的 k 个前导序列的信号强度大于等于预设强度阔 值, 基站则返回对应于 k个前导序列的响应消息。
若叠加后的 k 个前导序列的信号强度大于等于预设强度阔值, 即 基站叠加接收到的 k个前导序列后的信号强度可以匹配预设强度阔值, 基站则返回对应于 k个前导序列的响应消息至用户设备。
本领域的普通技术人员可以理解, 基站对接收到的 k 个前导序列 的信号强度进行叠加可以为基站将接收到的 k 个前导序列的信号强度 进行相加, 以得到 k个前导序列的总信号强度,基站将该总信号强度与 预设强度阈值进行对比,即基站将该总信号强度与预设强度阈值进行匹 配, 若该总信号强度大于等于预设强度阔值, 也就是说, 该总信号强度 与预设强度阔值可以正确匹配,基站则发送对应于 k个前导序列的响应 消息至用户设备, 以使用户设备接入基站。
需要说明的是, 上述用户设备确定用于随机接入的前导序列在预 设 PRACH 的预设资源位置上的重复次数的三种方法中所提出的重复次 数, 均为预先根据用户设备的最大链路损耗制定的最大重复次数, 以实 现用户设备通过在预设 PRACH的 n个预设资源位置上发送选定的前导序 列后,基站能正确匹配接收到的 k个前导序列, 并返回相应的响应消息 至用户设备 ,从而达到提高基站的匹配概率以及用户设备接入基站的效 率。
本发明实施例提供的前导序列的传输方法的另一种实现方式中, 用户设备可根据预设 PRACH , 在预设 PRACH的 n个预设资源位置上发送 前导序列至基站之后, 若在预设时间内, 用户设备未检测到来自基站的 对应于该前导序列的响应消息,用户设备则可在预设 PRACH的 p个预设 资源位置上发送前导序列至基站, 其中, P>n。
本领域普通技术人员可以理解, 用户设备在预设 PRACH 的 n个预
设资源位置上发送前导序列至基站后, 若在预设时间内, 用户设备未接 收到来自基站的相应的响应消息,用户设备则可在预设 PRACH的 p个预 设资源位置上发送前导序列至基站, 其中, p>n。
需要说明的是, 上述预设 PRACH 的 n个预设资源位置具体可以为 预设 PRACH中预设的 1个无线帧中的 n个预设子帧,该 n个预设子帧为 预设的重复发送前导序列的子帧; 相应的, 上述预设 PRACH的 p个预设 资源位置具体也可以为预设 PRACH中预设的 1个无线帧中的 p个预设子 帧, 该 p个预设子帧为预设的重复发送前导序列的子帧,且该 n个预设 子帧和该 p个预设子帧可以为相同的子帧, 也可以为不同的子帧。
特别地, 若 1 个子帧内频域上包含两个用于发送前导序列的可用 资源位置时,则可以将同一个子帧内的两个资源位置分别预设为用于前 导序列重复 n次的位置和用于前导序列重复 p次的位置, 这时, 前导序 列重复 n 次和前导序列重复 p 次的子帧为同一个子帧; 相应的, 若 1 个子帧内仅包含一个用于发送前导序列的可用资源位置,则这个可用资 源位置可以预设为用于前导序列重复 n次的位置或用于前导序列重复 p 次的位置, 这时, 前导序列重复 n次和前导序列重复 p次的子帧为不同 的子帧。
具体的, 如图 10所示, 用户设备在第 1帧内的 1号子帧和第 1帧 内的 5号子帧分别发送 1次前导序列至基站之后,若未接收到来自基站 的对应于前导序列的响应消息, 则用户设备在第 2帧内的 3号子帧、第 2帧内的 5号子帧、 第 2帧内的 7号子帧以及第 2帧内的 9号子帧分别 发送 1次前导序列至基站。
需要说明的是, 上述预设 PRACH 的结构示意图仅是示例性的对本 发明的实施例进行说明, 本领域的普通技术人员可以理解, 本发明提供 的预设 PRACH , 也就是说, 本发明提供的预设 PRACH的预设资源位置是 可以根据实际要求进行适应性调整的, 本发明不做限制。
进一步地, 以上描述的本发明实施例提供的前导序列的传输方法 及前导序列的传输方法的另一种实现方式, 均适用于 FDD 系统和 TDD ( T ime D i v i s i on Dup l ex , 时分复用 ) 系统。
本发明实施例还提供一种前导序列的传输方法的其他实现方式, 在该实现方式中, 通过改变前导序列的信号格式, 即将现有技术中的前
导序列进行级联后构成新的前导序列,同时将预设 PRACH的预设资源位 置预设为连续的子帧, 以用来发送新的前导序列。
示例性的, 如图 1 1所示, 为将现有技术的 2个 2毫秒的前导序列 进行级联后, 构成的新的前导序列。 由图 1 1可以看出, 该新的前导序 列中的每个 2毫秒的前导序列中 CP及保护时间的长度保持不变, 即该 新的前导序列所支持的基站覆盖范围的半径与 2 毫秒的前导序列支持 的基站覆盖范围的半径相同。
特别的, 若本发明实施例提供的预设 PRACH包括预设的 2个 1 0毫 秒的无线帧, 则对于 1毫秒的前导序列, 可在预设的每个 1 0毫秒无线 帧的每个子帧内均预设 1次发送 1毫秒前导序列的机会,对于 2毫秒的 前导序列, 可在预设的每个 1 0毫秒无线帧的每两个连续子帧内预设 1 次发送 2毫秒前导序列的机会, 那么,对于由 2个 2毫秒的前导序列进 行级联后构成的新的前导序列, 则可在预设的每个 1 0毫秒无线帧的每 四个连续子帧内预设 1次发送该新的前导序列的机会。
示例性的, 如图 1 2所示, 为将现有技术的 7个 1毫秒的前导序列 进行合并后, 构成的新的前导序列, 由图 1 2可以看出, 该前导序列中 前导、 CP以及保护时间均为 1毫秒前导序列中前导、 CP以及保护时间 的 7倍, 也就是说, 由于 CP及保护时间增大, 则该新的前导序列所支 持的基站覆盖范围的半径大于 1 毫秒的前导序列支持的基站覆盖范围 的半径。
需要说明的是, 上述前导序列的传输方法的其他实现方式需定义 新的前导序列的信号格式,同时需将预设 PRACH的预设资源位置预设为 连续的子帧, 以用来发送新的前导序列。 特别的, 该实现方式仅适用于 FDD系统。
本发明实施例提供的一种前导序列的传输方法, 通过获取基站广 播的系统信息或者物理广播信道 PBCH , 系统信息或者 PBCH包括预设物 理随机接入信道 PRACH , 预设 PRACH 包括预设的 m个无线帧, 其中, m 为正整数;确定用于随机接入的前导序列在预设 PRACH的预设资源位置 上的重复次数为 n次, 其中, l n 1 0m; 在预设 PRACH的 n个预设资 源位置上发送前导序列至基站。 通过该方案, 由于用户设备在预设 PRACH的 n个预设资源位置上发送前导序列至基站, 即用户设备发送至
基站的前导序列的重复次数增加, 因此, 以使得基站接收到的前导序列 的信号强度增强,从而可以正确匹配该前导序列, 进而提高基站的匹配 概率, 以及用户设备接入小区的效率。
实施例二
如图 13所示, 本发明实施例提供一种用户设备 4, 包括: 第一接收单元 40, 用于获取基站广播的系统信息或者 PBCH, 所述 系统信息或者所述 PBCH包括预设 PRACH,所述预设 PRACH包括预设的 m 个无线帧, 其中, m为正整数。
第一处理单元 41, 用于确定用于随机接入的前导序列在所述预设 PRACH的预设资源位置上的重复次数为 n次, 其中, l n 10m。
第一发送单元 42, 用于在所述预设 PRACH的 n个预设资源位置上 发送所述前导序列至所述基站。
所述第一处理单元 41,具体用于根据所述系统信息或者所述 PBCH, 确定所述前导序列在所述预设 PRACH的预设资源位置上的重复次数为 n 次。
或者, 所述第一接收单元 40, 具体用于接收所述基站发送的下行 参考信号, 以及所述第一处理单元 41, 具体用于根据所述下行参考信 号,确定所述前导序列在所述预设 PRACH的预设资源位置上的重复次数 为 n次。
或者, 所述第一处理单元 41, 具体用于根据预先制定的无线通信 协议,确定所述前导序列在所述预设 PRACH的预设资源位置上的重复次 数为 n次。
所述第一处理单元 41, 还用于根据所述系统信息或者所述 PBCH, 在多个可用的前导序列中选择一个用于随机接入的前导序列。
进一步地, 所述第一发送单元 42, 具体用于在所述预设 PRACH 中 预设的 m个无线帧的 n个预设资源位置上发送所述前导序列至所述基 站。
进一步地, 所述第一发送单元 42, 具体用于在所述预设 PRACH 中 预设的 m个无线帧中的 n个预设子帧内发送所述前导序列至所述基站。
参照图 8,本发明实施例以 1毫秒的前导序列及预设 PRACH包括预
设的连续的 2个 1 0毫秒的无线帧为例, 对应于本发明实施例提供的一 种预设 PRACH , 所述第一发送单元 42 , 具体用于若用户设备发送至基站 的前导序列的重复次数为 2 次, 则在第 1 帧内的 1 号子帧和所述第 1 帧内的 5号子帧分别发送 1次所述前导序列至所述基站, 或, 所述第一 发送单元 42在所述第 1帧内的 9号子帧和第 2帧内的 1号子帧分别发 送 1次所述前导序列至所述基站, 或, 所述第一发送单元 42在所述第 2帧内的 5号子帧和所述第 2帧内的 9号子帧分别发送 1次所述前导序 列至所述基站。
或者, 所述第一发送单元 42 , 具体用于若用户设备发送至基站的 前导序列的重复次数为 4次, 则在所述第 1帧内的 3号子帧、 所述第 1 帧内的 7号子帧、所述第 2帧内的 3号子帧以及所述第 2帧内的 7号子 帧分别发送 1次所述前导序列至所述基站。
参照图 9 ,本发明实施例以 1毫秒的前导序列及预设 PRACH包括预 设的连续的 2个 1 0毫秒的无线帧为例, 对应于本发明实施例提供的另 一种预设 PRACH , 所述第一发送单元 4 2 , 具体用于若用户设备发送至基 站的前导序列的重复次数为 2次, 则在第 1帧内的 9号子帧和所述第 2 帧内的 1号子帧分别发送 1次所述前导序列至所述基站。
或者, 所述第一发送单元 42 , 具体用于若用户设备发送至基站的 前导序列的重复次数为 4次, 则在所述第 1帧内的 1号子帧、 所述第 1 帧内的 3号子帧、所述第 1帧内的 5号子帧以及所述第 1帧内的 7号子 帧分别发送 1 次所述前导序列至所述基站, 或, 所述第一发送单元 42 在所述第 2帧内的 3号子帧、 所述第 2帧内的 5号子帧、所述第 1帧内 的 7号子帧以及所述第 2帧内的 9号子帧分别发送 1次所述前导序列至 所述基站。
需要说明的是, 上述预设 PRACH 的结构示意图仅是示例性的对本 发明的实施例进行说明, 本领域的普通技术人员可以理解, 本发明提供 的预设 PRACH , 也就是说, 本发明提供的预设 PRACH的预设资源位置是 可以根据实际要求进行适应性调整的, 本发明不做限制。
本发明实施例还提供前导序列的传输方法的另一种实现方式, 包 括:
所述第一发送单元 42 , 用于在所述预设 PRACH的 n个预设资源位
置上发送所述前导序列至所述基站之后, 若所述第一接收单元 40未接 收到来自所述基站的响应消息, 则所述第一发送单元 42还用于在所述 预设 PRACH的 p个预设资源位置上发送所述前导序列至所述基站,其中, ρ>η。
对应于本发明实施例提供的前导序列的传输方法的另一种实现方 式, 所述第一发送单元 42 , 用于在第 1帧内的 1号子帧和所述第 1帧 内的 5号子帧分别发送 1次所述前导序列至所述基站之后,若所述第一 接收单元 40未接收到来自所述基站的对应于所述前导序列的所述响应 消息, 则所述第一发送单元 42还用于在所述第 2帧内的 3号子帧、 所 述第 2帧内的 5号子帧、所述第 2帧内的 7号子帧以及所述第 2帧内的 9号子帧分别发送 1次所述前导序列至所述基站。
本发明实施例提供的一种用户设备, 通过获取基站广播的系统信 息或者物理广播信道 PBCH , 系统信息或者 PBCH包括预设物理随机接入 信道 PRACH , 预设 PRACH包括预设的 m个无线帧, 其中, m为正整数; 确定用于随机接入的前导序列在预设 PRACH 的预设资源位置上的重复 次数为 n次, 其中, l n 10m; 在预设 PRACH的 n个预设资源位置上 发送前导序列至基站。 通过该方案, 由于用户设备在预设 PRACH 的 n 个预设资源位置上发送前导序列至基站,即用户设备发送至基站的前导 序列的重复次数增加, 因此, 以使得基站接收到的前导序列的信号强度 增强, 从而可以正确匹配该前导序列, 进而提高基站的匹配概率, 以及 用户设备接入小区的效率。
如图 14所示, 本发明实施例提供一种基站 5 , 包括:
第二发送单元 50 , 用于广播系统信息或者 PBCH , 所述系统信息或 者所述 PBCH包括预设 PRACH , 所述预设 PRACH包括预设的 m个无线帧, 其中, m为正整数。
第二接收单元 51 , 用于在预设 PRACH的 n个预设资源位置上接收 来自用户设备的 k个前导序列,所述 k个前导序列为所述用户设备在确 定用于随机接入的前导序列在所述预设 PRACH 的预设资源位置上的重 复次数为 n次后, 在所述预设 PRACH的 n个预设资源位置上发送的, 其 中, 1 n 10m , k n。
进一步地, 所述第二发送单元 50 , 还用于发送下行参考信号, 以
使得所述用户设备根据接收到的所述下行参考信号,确定所述前导序列 在所述预设 PRACH的预设资源位置上的重复次数为 n次。
进一步地, 所述第二接收单元 51 , 具体用于在所述预设 PRACH 中 预设的 m个无线帧的 n个预设资源位置上接收来自所述用户设备的 k 个前导序列。
进一步地, 所述第二接收单元 51 , 具体用于在所述预设 PRACH 中 预设的 m个无线帧中的 n个预设子帧内接收来自所述用户设备的 k个前 导序列。
如图 15所示, 本发明实施例提供的基站 5 , 还包括:
第二处理单元 52 ,用于叠加第二接收单元 51接收到的所述 k个前 导序列的信号强度,并将叠加后的所述 k个前导序列的信号强度与预设 强度阈值进行对比。
进一步地, 所述第二发送单元 50 , 还用于若第二处理单元 52叠加 后的所述 k个前导序列的信号强度大于等于预设强度阔值,则返回对应 于所述 k个前导序列的响应消息至所述用户设备。
本发明实施例提供一种基站, 通过广播系统信息或者 PBCH , 系统 信息或者 PBCH包括预设 PRACH , 预设 PRACH包括预设的 m个无线帧, 其中, m为正整数; 在预设 PRACH的 n个预设资源位置上接收来自用户 设备的 k个前导序列,所述 k个前导序列为所述用户设备在确定用于随 机接入的前导序列在预设 PRACH 的预设资源位置上的重复次数为 n次 后, 在所述预设 PRACH的 n个预设资源位置上发送的。 通过该方案, 由 于用户设备在预设 PRACH的 n个预设资源位置上发送前导序列至基站, 即用户设备发送至基站的前导序列的重复次数增加, 因此, 以使得基站 接收到的前导序列的信号强度增强,从而可以正确匹配该前导序列, 进 而提高基站的匹配概率, 以及用户设备接入小区的效率。
实施例三
如图 16所示, 本发明实施例提供一种用户设备 4 , 包括: 第一接收器 44 , 用于获取基站广播的系统信息或者 PBCH , 所述系 统信息或者所述 PBCH 包括预设 PRACH , 所述预设 PRACH 包括预设的 m 个无线帧, 其中, m为正整数。
第一处理器 45 , 用于确定用于随机接入的前导序列在所述预设
PRACH的预设资源位置上的重复次数为 n次, 其中, l n 10m。
第一发送器 46 , 用于在所述预设 PRACH的 n个预设资源位置上发 送所述前导序列至所述基站。
所述第一处理器 45 , 具体用于根据所述系统信息或者所述 PBCH , 确定所述前导序列在所述预设 PRACH的预设资源位置上的重复次数为 n 次。
或者, 所述第一接收器 44 , 具体用于接收所述基站发送的下行参 考信号, 以及所述第一处理器 45 , 具体用于根据所述下行参考信号, 确定所述前导序列在所述预设 PRACH的预设资源位置上的重复次数为 n 次。
或者, 所述第一处理器 45 , 具体用于根据预先制定的无线通信协 议,确定所述前导序列在所述预设 PRACH的预设资源位置上的重复次数 为 n次。
所述第一处理器 45 , 还用于根据所述系统信息或者所述 PBCH , 在 多个可用的前导序列中选择一个用于随机接入的前导序列。
进一步地, 所述第一发送器 46 , 具体用于在所述预设 PRACH中预 设的 m个无线帧的 n个预设资源位置上发送所述前导序列至所述基站。
进一步地, 所述第一发送器 46 , 具体用于在所述预设 PRACH中预 设的 m个无线帧中的 n个预设子帧内发送所述前导序列至所述基站。
参照图 8 ,本发明实施例以 1毫秒的前导序列及预设 PRACH包括预 设的连续的 2个 1 0毫秒的无线帧为例, 对应于本发明实施例提供的一 种预设 PRACH , 所述第一发送器 46 , 具体用于若用户设备发送至基站的 前导序列的重复次数为 2次,则在第 1帧内的 1号子帧和所述第 1帧内 的 5号子帧分别发送 1次所述前导序列至所述基站,或在所述第 1帧内 的 9号子帧和第 2帧内的 1号子帧分别发送 1次所述前导序列至所述基 站,或在所述第 2帧内的 5号子帧和所述第 2帧内的 9号子帧分别发送 1次所述前导序列至所述基站。
或者, 所述第一发送器 46 , 具体用于若用户设备发送至基站的前 导序列的重复次数为 4 次, 则在所述第 1 帧内的 3号子帧、 所述第 1 帧内的 7号子帧、所述第 2帧内的 3号子帧以及所述第 2帧内的 7号子 帧分别发送 1次所述前导序列至所述基站。
参照图 9 ,本发明实施例以 1毫秒的前导序列及预设 PRACH包括预 设的连续的 2个 1 0毫秒的无线帧为例, 对应于本发明实施例提供的另 一种预设 PRACH , 所述第一发送器 46 , 具体用于若用户设备发送至基站 的前导序列的重复次数为 2 次, 则在第 1 帧内的 9 号子帧和所述第 2 帧内的 1号子帧分别发送 1次所述前导序列至所述基站。
或者, 所述第一发送器 4 6 , 具体用于若用户设备发送至基站的前 导序列的重复次数为 4 次, 则在所述第 1 帧内的 1 号子帧、 所述第 1 帧内的 3号子帧、所述第 1帧内的 5号子帧以及所述第 1帧内的 7号子 帧分别发送 1次所述前导序列至所述基站,或在所述第 2帧内的 3号子 帧、 所述第 2帧内的 5号子帧、 所述第 2帧内的 7号子帧以及所述第 1 帧内的 9号子帧分别发送 1次所述前导序列至所述基站。
需要说明的是, 上述预设 PRACH 的结构示意图仅是示例性的对本 发明的实施例进行说明, 本领域的普通技术人员可以理解, 本发明提供 的预设 PRACH , 也就是说, 本发明提供的预设 PRACH的预设资源位置是 可以根据实际要求进行适应性调整的, 本发明不做限制。
本发明实施例还提供前导序列的传输方法的另一种实现方式, 包 括:
所述第一发送器 46 , 用于在所述预设 PRACH的 n个预设资源位置 上发送所述前导序列至所述基站之后, 若所述第一接收器 44未接收到 来自所述基站的响应消息, 则所述第一发送器 4 6 还用于在所述预设 PRACH的 p个预设资源位置上发送所述前导序列至所述基站,其中,p>n。
对应于本发明实施例提供的前导序列的传输方法的另一种实现方 式, 所述第一发送器 46 , 用于在第 1帧内的 1号子帧和所述第 1帧内 的 5号子帧分别发送 1次所述前导序列至所述基站之后,若所述第一接 收器 44 未接收到来自所述基站的对应于所述前导序列的所述响应消 息, 则所述第一发送器 46还用于在所述第 2帧内的 3号子帧、 所述第 2帧内的 5号子帧、 所述第 2帧内的 7号子帧以及所述第 2帧内的 9号 子帧分别发送 1次所述前导序列至所述基站。
本发明实施例提供的一种用户设备, 通过获取基站广播的系统信 息或者物理广播信道 PBCH , 系统信息或者 PBCH包括预设物理随机接入 信道 PRACH , 预设 PRACH包括预设的 m个无线帧, 其中, m为正整数;
确定用于随机接入的前导序列在预设 PRACH 的预设资源位置上的重复 次数为 n次, 其中, l n 10m; 在预设 PRACH的 n个预设资源位置上 发送前导序列至基站。 通过该方案, 由于用户设备在预设 PRACH 的 n 个预设资源位置上发送前导序列至基站,即用户设备发送至基站的前导 序列的重复次数增加, 因此, 以使得基站接收到的前导序列的信号强度 增强, 从而可以正确匹配该前导序列, 进而提高基站的匹配概率, 以及 用户设备接入小区的效率。
如图 17所示, 本发明实施例提供一种基站 5, 包括:
第二发送器 53, 用于广播系统信息或者 PBCH, 所述系统信息或者 所述 PBCH包括预设 PRACH, 所述预设 PRACH包括预设的 m个无线帧, 其中, m为正整数。
第二接收器 54, 用于在预设 PRACH的 n个预设资源位置上接收来 自用户设备的 k个前导序列,所述 k个前导序列为所述用户设备在确定 用于随机接入的前导序列在所述预设 PRACH 的预设资源位置上的重复 次数为 n次后,在所述预设 PRACH的 n个预设资源位置上发送的,其中, Kn< 10m, k n。
进一步地, 所述第二发送器 53, 还用于发送下行参考信号, 以使 得所述用户设备根据接收到的所述下行参考信号,确定所述前导序列在 所述预设 PRACH的预设资源位置上的重复次数为 n次。
进一步地, 所述第二接收器 54, 具体用于在所述预设 PRACH中预 设的 m个无线帧的 n个预设资源位置上接收来自所述用户设备的 k个前 导序列。
进一步地, 所述第二接收器 54, 具体用于在所述预设 PRACH中预 设的 m个无线帧中的 n个预设子帧内接收来自所述用户设备的 k个前导 序列。
如图 18所示, 本发明实施例提供的基站 5, 还包括:
第二处理器 55,用于叠加第二接收器 54接收到的所述 k个前导序 列的信号强度,并将叠加后的所述 k个前导序列的信号强度与预设强度 阔值进行对比。
进一步地, 所述第二发送器 53, 还用于若第二处理器 55叠加后的 所述 k个前导序列的信号强度大于等于预设强度阔值,则返回对应于所
述 k个前导序列的响应消息至所述用户设备。
本发明实施例提供一种基站, 通过广播系统信息或者 PBCH , 系统 信息或者 PBCH包括预设 PRACH , 预设 PRACH包括预设的 m个无线帧, 其中, m为正整数; 在预设 PRACH的 n个预设资源位置上接收来自用户 设备的 k个前导序列,所述 k个前导序列为所述用户设备在确定用于随 机接入的前导序列在预设 PRACH 的预设资源位置上的重复次数为 n次 后, 在所述预设 PRACH的 n个预设资源位置上发送的。 通过该方案, 由 于用户设备在预设 PRACH的 n个预设资源位置上发送前导序列至基站, 即用户设备发送至基站的前导序列的重复次数增加, 因此, 以使得基站 接收到的前导序列的信号强度增强,从而可以正确匹配该前导序列, 进 而提高基站的匹配概率, 以及用户设备接入小区的效率。
如图 19所示, 本发明实施例提供一种前导序列的传输系统 6 , 包 括:
以上任意所述的用户设备 4和以上任意所述的基站 5。
本发明实施例提供的前导序列的传输系统, 通过用户设备获取基 站广播的系统信息或者 PBCH , 所述系统信息或者 PBCH包括预设 PRACH 以及多个前导序列, 所述预设 PRACH包括预设的 m个无线帧, 其中, m 为正整数; 用户设备确定用于随机接入的前导序列在所述预设 PRACH 的预设资源位置上的重复次数为 n次, 其中, l n 10m; 用户设备在 所述预设 PRACH的 n个预设资源位置上发送所述前导序列至所述基站, 以使得所述基站在叠加并匹配接收到的 k个前导序列后,返回对应于所 述 k个前导序列的响应消息。 通过该方案, 由于用户设备在预设 PRACH 的 n个预设资源位置上发送前导序列至基站,即用户设备发送至基站的 前导序列的重复次数增加, 因此, 以使得基站接收到的前导序列的信号 强度增强, 从而可以正确匹配该前导序列, 进而提高基站的匹配概率, 以及用户设备接入小区的效率。
本发明方案可以在由计算机执行的计算机可执行指令的一般上下 文中描述, 例如程序单元。 一般地, 程序单元包括执行特定任务或实现 特定抽象数据类型的例程、 程序、 对象、 组件、 数据结构等等。 也可以 在分布式计算环境中实践本发明方案,在这些分布式计算环境中, 由通 过通信网络而被连接的远程处理设备来执行任务。 在分布式计算环境
中,程序单元可以位于包括存储设备在内的本地和远程计算机存储介质 中。 间相同相似的部分互相参见即可,每个实施例重点说明的都是与其他实 施例的不同之处。 尤其, 对于装置实施例而言, 由于其基本相似于方法 实施例, 所以描述得比较简单,相关之处参见方法实施例的部分说明即 可。 以上所描述的装置实施例仅仅是示意性的, 其中所述作为分离部件 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模 块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性劳 动的情况下, 即可以理解并实施。
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 出本发明的范围。
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, 上述描述的系统、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, 所揭露的系统、 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 可以集成到另一个系统, 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, 在本发明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, 本发明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)执行本发明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(ROM , Read-On l y Memory ) , 随机存取存储器( RAM , Random Acce s s Memory ) 、 磁碟或者光盘等各种可以存储程序代码的介质。
通过以上的实施方式的描述, 所属领域的技术人员可以清楚地了 解到本发明可借助软件加必需的通用硬件的方式来实现,通用硬件包括 通用集成电路、 通用 CPU、 通用存储器、 通用元器件等, 当然也可以通 过专用硬件包括专用集成电路、 专用 CPU、 专用存储器、 专用元器件等 来实现, 但很多情况下前者是更佳的实施方式。 基于这样的理解, 本发 明的技术方案本质上或者说对现有技术做出贡献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可读取的存储介质中,如 计算机的软盘,硬盘或光盘等, 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)执行本发明各个实施 例的方法。 以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不 局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易想到变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本 发明的保护范围应以所述权利要求的保护范围为准。
Claims
1、 一种前导序列的传输方法, 其特征在于, 包括:
获取基站广播的系统信息或者物理广播信道 PBCH , 所述系统信息或 者所述 PBCH包括预设物理随机接入信道 PRACH , 所述预设 PRACH包括预 设的 m个无线帧, 其中, m为正整数;
确定用于随机接入的前导序列在所述预设 PRACH 的预设资源位置上 的重复次数为 n次, 其中, l n 10m;
在所述预设 PRACH 的 n个预设资源位置上发送所述前导序列至所述 基站。
2、 根据权利要求 1所述的前导序列的传输方法, 其特征在于, 所述 确定用于随机接入的前导序列在所述预设 PRACH 的预设资源位置上的重 复次数为 n次的方法具体包括:
根据所述系统信息或者所述 PBCH , 确定所述前导序列在所述预设 PRACH的预设资源位置上的重复次数为 n次;
或者,
接收所述基站发送的下行参考信号,以及根据所述下行参考信号, 确 定所述前导序列在所述预设 PRACH的预设资源位置上的重复次数为 n次; 或者,
根据预先制定的无线通信协议,确定所述前导序列在所述预设 PRACH 的预设资源位置上的重复次数为 n次。
3、 根据权利要求 1或 2所述的前导序列的传输方法, 其特征在于, 所述在所述预设 PRACH 的 n个预设资源位置上发送所述前导序列至所述 基站包括:
在所述预设 PRACH中预设的 m个无线帧中的 n个预设子帧内发送所 述前导序列至所述基站。
4、 根据权利要求 1-3任一项所述的前导序列的传输方法, 其特征在 于, 所述在所述预设 PRACH 的 n个预设资源位置上发送所述前导序列至 所述基站之后, 还包括:
若未接收到来自所述基站的响应消息, 则在所述预设 PRACH 的 p个 预设资源位置上发送所述前导序列至所述基站, 其中, p>n。
5、 一种前导序列的传输方法, 其特征在于, 包括:
广播系统信息或者 PBCH , 所述系统信息或者所述 PBCH 包括预设
PRACH , 所述预设 PRACH包括预设的 m个无线帧, 其中, m为正整数; 在所述预设 PRACH的 n个预设资源位置上接收来自用户设备的 k个 前导序列, 所述 k 个前导序列为所述用户设备在确定用于随机接入的前 导序列在所述预设 PRACH 的预设资源位置上的重复次数为 n次后, 在所 述预设 PRACH的 n个预设资源位置上发送的, 其中, l n 1 0m , k < n 0
6、 根据权利要求 5所述的前导序列的传输方法, 其特征在于, 所述 在所述预设 PRACH的 n个预设资源位置上接收来自用户设备的 k个前导 序列之前, 所述方法还包括:
发送下行参考信号, 以使得所述用户设备根据接收到的所述下行参 考信号, 确定所述前导序列在所述预设 PRACH 的预设资源位置上的重复 次数为 n次。
7、 根据权利要求 5或 6所述的前导序列的传输方法, 其特征在于, 所述在所述预设 PRACH的 n个预设资源位置上接收来自用户设备的 k个 前导序列包括:
在所述预设 PRACH中预设的 m个无线帧中的 n个预设子帧内接收来 自所述用户设备的 k个前导序列。
8、 一种用户设备, 其特征在于, 包括:
第一接收单元, 用于获取基站广播的系统信息或者 PBCH , 所述系统 信息或者所述 PBCH包括预设 PRACH , 所述预设 PRACH包括预设的 m个无 线帧, 其中, m为正整数;
第一处理单元,用于确定用于随机接入的前导序列在所述预设 PRACH 的预设资源位置上的重复次数为 n次, 其中, l n 1 0m;
第一发送单元, 用于在所述预设 PRACH 的 n个预设资源位置上发送 所述前导序列至所述基站。
9、 根据权利要求 8所述的用户设备, 其特征在于,
所述第一处理单元, 具体用于根据所述系统信息或者所述 PBCH , 确 定所述前导序列在所述预设 PRACH的预设资源位置上的重复次数为 n次; 或者,
所述第一接收单元, 具体用于接收所述基站发送的下行参考信号, 以及所述第一处理单元, 具体用于根据所述下行参考信号, 确定所述前 导序列在所述预设 PRACH的预设资源位置上的重复次数为 n次;
或者,
所述第一处理单元, 具体用于根据预先制定的无线通信协议, 确定 所述前导序列在所述预设 PRACH的预设资源位置上的重复次数为 n次。
10、 根据权利要求 8或 9所述的用户设备, 其特征在于,
所述第一发送单元, 具体用于在所述预设 PRACH 中预设的 m个无线 帧中的 n个预设子帧内发送所述前导序列至所述基站。
11、 根据权利要求 8-10任一项所述的用户设备, 其特征在于, 所述 第一发送单元, 用于在所述预设 PRACH 的 n个预设资源位置上发送所述 前导序列至所述基站之后, 若所述第一接收单元未接收到来自所述基站 的响应消息, 则所述第一发送单元还用于在所述预设 PRACH 的 p个预设 资源位置上发送所述前导序列至所述基站, 其中, P>n。
12、 一种基站, 其特征在于, 包括:
第二发送单元, 用于广播系统信息或者 PBCH, 所述系统信息或者所 述 PBCH包括预设 PRACH, 所述预设 PRACH包括预设的 m个无线帧, 其中, m为正整数;
第二接收单元, 用于在所述预设 PRACH 的 n个预设资源位置上接收 来自用户设备的 k个前导序列, 所述 k个前导序列为所述用户设备在确 定用于随机接入的前导序列在所述预设 PRACH 的预设资源位置上的重复 次数为 n次后, 在所述预设 PRACH的 n个预设资源位置上发送的, 其中, K n< 10m, k n。
13、 根据权利要求 12所述的基站, 其特征在于,
所述第二发送单元, 还用于发送下行参考信号, 以使得所述用户设 备根据接收到的所述下行参考信号,确定所述前导序列在所述预设 PRACH 的预设资源位置上的重复次数为 n次。
14、 根据权利要求 12或 13所述的基站, 其特征在于,
所述第二接收单元, 具体用于在所述预设 PRACH 中预设的 m个无线 帧中的 n个预设子帧内接收来自所述用户设备的 k个前导序列。
15、 一种前导序列的传输系统, 其特征在于, 包括如权利要求 8-11 任一所述的用户设备和如权利要求 12-14任一所述的基站。
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2014
- 2014-01-07 EP EP14735177.9A patent/EP2934058B1/en active Active
- 2014-01-07 WO PCT/CN2014/070241 patent/WO2014106498A1/zh not_active Ceased
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2015
- 2015-07-07 US US14/793,472 patent/US9788304B2/en active Active
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2017
- 2017-09-22 US US15/712,792 patent/US10257808B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101035103A (zh) * | 2006-03-09 | 2007-09-12 | 华为技术有限公司 | 一种正交频分复用接入系统的前导码生成方法及装置 |
| US20070291696A1 (en) * | 2006-06-19 | 2007-12-20 | Interdigital Technology Corporation | Method and apparatus for performing random access in a wireless communication system |
| CN101809896A (zh) * | 2007-08-09 | 2010-08-18 | Lg电子株式会社 | 构建rach前导的方法以及传送rach信号的方法 |
Non-Patent Citations (1)
| Title |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107113877A (zh) * | 2015-01-08 | 2017-08-29 | 夏普株式会社 | 终端装置、基站装置、无线通信方法及集成电路 |
| CN107113877B (zh) * | 2015-01-08 | 2021-06-08 | 夏普株式会社 | 终端装置、基站装置、无线通信方法及集成电路 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2934058A1 (en) | 2015-10-21 |
| US20150312887A1 (en) | 2015-10-29 |
| US20180014279A1 (en) | 2018-01-11 |
| CN103916974B (zh) | 2018-06-05 |
| EP2934058B1 (en) | 2026-04-15 |
| EP2934058A4 (en) | 2015-11-25 |
| CN103916974A (zh) | 2014-07-09 |
| US9788304B2 (en) | 2017-10-10 |
| US10257808B2 (en) | 2019-04-09 |
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