CN108353435A - A kind of method and device of random access - Google Patents
A kind of method and device of random access Download PDFInfo
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- CN108353435A CN108353435A CN201680062439.4A CN201680062439A CN108353435A CN 108353435 A CN108353435 A CN 108353435A CN 201680062439 A CN201680062439 A CN 201680062439A CN 108353435 A CN108353435 A CN 108353435A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
A kind of method and device of random access, this method include：The random access request message of network equipment receiving terminal apparatus；The network equipment sends random access response RAR message at least twice in set period of time and carries out random access for the terminal device to the terminal device, the RAR message；Wherein, the set period of time is that the network equipment receives the random access request message to the time sent between message 4.This method and device are for solving the problem of that random access scheme terminal device power consumption is big in the prior art and reduces RACH capacity.
Description
The present invention relates to field of communication technology more particularly to a kind of method and devices of random access.
In machine and machine (Machine-to-Machine, M2M) system, terminal device needs random access procedure similarly to establish connection and complete uplink synchronous.Random access procedure in M2M system has the change of some message and the simplification of process relative to the random access procedure of long term evolution (Long Term Evolution, LTE).By taking random access procedure competition-based as an example:
Message 1 in M2M system contains buffer status reporting (Buffer Status Reports, BSR) information, message 2 includes random access RNTI (Random Access RNTI,) and random number RA-RNTI, and Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Cell RNTI, C-RNTI) is distributed, while the transfer resource of assignment messages 3, data can be directly transmitted in message 3, message 4 is Conflict solving.
The existing physical layer down control channel of M2M (Physical Downlink Control Channel, PDCCH) reliability of channel only has 90%, different from the 99% of LTE, and RAR message does not retransmit, it is bad to be primarily due to channel quality the reason of causing transmission to fail, generate this problem to can not receive RAR message which results in many times terminal device.
When terminal device is after distributing message 1, if not receiving message 2, random access can be re-initiated.Due to physical layer down control channel (Physical Downlink Control Channel, PDCCH reliability) only has 90%, even if the network equipment allows terminal device to access, message 2 is sent to the terminal device to respond, and message 2 is because bad channel quality causes the probability for sending failure relatively high, thus make great amount of terminals equipment that can not be successfully received message 2, random access can be re-initiated, terminal device power consumption is caused to increase, and random selection random access channel (random access channel, RACH) capacity can be reduced.
Summary of the invention
This document describes a kind of method and devices of random access, to solve the problem of that random access scheme terminal device power consumption in the prior art is big and reduces RACH capacity.
In a first aspect, providing a kind of method of random access, comprising:
The random access request message of network equipment receiving terminal apparatus；
The network equipment sends random access response RAR message at least twice in the set time period and is used for the terminal device to the terminal device, the RAR message and carries out random access；Wherein, the set period of time is that the network equipment receives the random access request message to the time sent between message 4.
In a possible design, sending RAR message at least twice in the set time period to the terminal device includes:
The RAR message at least twice is continuously transmitted before receiving message 3；Or
RAR message is sent for the first time after the random access request message for receiving terminal device, if not receiving the message 3 of terminal device transmission on the resource location of setting, sends the RAR message for the second time.
In this design, repeatedly sending RAR message can be improved the probability that terminal device receives RAR message, to reduce because transmitting failure caused by channel quality is bad.
In a possible design, the resource location of the setting includes:
The resource location of first reception message 3；Or the re-transmission position of message 3.
In a possible design, the RAR message at least twice that sends in the set time period includes: and RAR message at least twice to be sent on down control channel within the period of setting.
In a possible design, this method further comprises adding Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI in RAR message at least twice described in the transmission, the C-RNTI is used for when terminal device is using receiving the RAR message progress random access failure, initiating random access again, according to the C-RNTI initiating random access procedure.
In this design, C-RNTI can be carried when sending RAR message, so that receiving RAR
The terminal device of message can carry out second of random access procedure according to the C-RNTI in RAR message in first time random access failure, and the identical probability of message 1 when so as to reduce access again can also reach the collision probability for reducing message 3.
It is not identical that Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI is added in a possible design, in the RAR message at least twice.
Second aspect provides a kind of method of random access, comprising:
The network equipment adds C-RNTI in the RAR message for being sent to the terminal device after receiving the random access request message of terminal device；
The network equipment sends the RAR message to the terminal device；So that the terminal device random access failure utilizes the C-RNTI initiating random access procedure carried in the RAR message received when initiating random access again.
The third aspect provides a kind of method of random access, comprising:
Terminal device sends random access request message to the network equipment using random number；
The terminal device detects at least two RAR messages of network equipment transmission in the set time period；
Random access is carried out according to any RAR message is received.
In a possible design, at least two RAR messages that the terminal device detects network equipment transmission in the set time period include:
At least two RAR messages whether detection has the network equipment to continuously transmit in the set period of time.
In a possible design, at least two RAR messages that the terminal device detects network equipment transmission in the set time period include:
First RAR message whether detection has the network equipment to send in first time period；
If receiving first RAR message, after sending message 3 corresponding with first RAR message, the message 4 that the network equipment is sent is detected whether, if without the message 4,
Second RAR message that the network equipment is sent is detected whether in second time period.
In a possible design, when the terminal device random access failure, this method further comprises:
Target RAR message is determined from least two RAR message；
C-RNTI is obtained from the target RAR message, and re-initiates random access procedure using the C-RNTI.
In a possible design, determine that target RAR message includes: from least two RAR message
Corresponding at least two C-RNTI is obtained from least two RAR message；
If at least two C-RNTI is not identical, the RAR message that terminal device described at least two RAR message receives the latest is determined as target RAR message.
In this design, it selects one to receive C-RNTI the latest from multiple C-RNTI and re-starts random access procedure, can guarantee the validity for carrying out the used random number of random access again.
Fourth aspect provides a kind of method of random access, comprising:
After terminal device initiates random access request message using random number, the RAR message that the network equipment is sent is received；
When terminal device random access failure, when initiating random access again, C-RNTI is obtained from the RAR message, and re-initiate random access procedure using the C-RNTI got.
5th aspect, the embodiment of the invention provides a kind of network equipment, which has the function of realizing network equipment behavior in above method design.The function can also execute corresponding software realization by hardware realization by hardware.The hardware or software include one or more modules corresponding with above-mentioned function.The module can be software and/or hardware.
In a possible design, in the structure of the network equipment include receiving module with:
The receiving module, the random access request message for receiving terminal apparatus；
The sending module, for sending in the set time period, random access response RAR message is to the terminal device at least twice, and the RAR message is for terminal device progress random access；Wherein, the set period of time is that the network equipment receives the random access request message to the time sent between message 4.
In a possible design, the sending module is specifically used for before the receiving module receives message 3, continuously transmits the RAR message twice；Alternatively, if not receiving the message 3 of terminal device transmission on the resource location of setting, sending the RAR message for the second time for sending RAR message for the first time after the random access request message for receiving terminal device.
In a possible design, the resource location of the setting includes:
The resource location of first reception message 3；Or the re-transmission position of message 3.
In conjunction with the first to two kind of possible implementation of the 5th aspect or the 5th aspect, in the third possible implementation, the sending module was specifically used within the period of setting, and RAR message at least twice is sent on down control channel.
In a possible design, the network equipment further include:
Processing module, for adding Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI in RAR message at least twice described in the transmission, the C-RNTI is used for when UE is using receiving the RAR message progress random access failure, initiating random access again, according to the C-RNTI initiating random access procedure.
In a possible design, the processing mould is also used to add different C-RNTI in the RAR message at least twice.
6th aspect, provides another network equipment, which includes:
Receiving module, the random access request message for receiving terminal apparatus；
Processing module, for adding C-RNTI in the RAR message for being sent to the terminal device；Wherein, when which initiates random access for second of the terminal device, the C-RNTI initiating random access procedure is utilized；
Sending module, for sending the RAR message to the terminal device.
7th aspect, provides a kind of terminal device, comprising:
Sending module, for sending random access request message to the network equipment using random number；
Processing module, for detecting at least two RAR messages of network equipment transmission in the set time period；And random access is carried out according to any RAR message is received.
In a possible design, the processing module is specifically used at least two RAR messages whether detection has the network equipment to continuously transmit in the set period of time.
In a possible design, the processing module is specifically used for first RAR message whether detection has the network equipment to send in first time period；
The terminal device further includes receiving module, for receiving first RAR message；
The sending module, for sending message 3 corresponding with first RAR message to the network equipment after receiving module receives first RAR message；
The processing module is specifically used for the message 4 for detecting whether that the network equipment is sent, if detecting whether second RAR message that the network equipment is sent in second time period without the message 4.
In a possible design, the processing module is also used to, and when terminal device random access failure, target RAR message is determined from least two RAR message；C-RNTI is obtained from the target RAR message, and re-initiates random access procedure using the C-RNTI.
In a possible design, the processing module is specifically used for obtaining corresponding at least two C-RNTI from least two RAR message；If at least two C-RNTI is not identical, the RAR message that terminal device described at least two RAR message receives the latest is determined as target RAR message.
Eighth aspect provides a kind of terminal device, which includes:
Sending module, for sending random access request message to the network equipment using random number；
AM access module, the RAR message sent for receiving the network equipment；When terminal device connects at random
Enter failure, when initiating random access again, C-RNTI is obtained from the RAR message, and re-initiate random access procedure using the C-RNTI got.
9th aspect, the embodiment of the invention provides a kind of M2M system, which includes the network equipment described in above-mentioned aspect and terminal device.
One or two of above-mentioned technical proposal at least has the following technical effect that
The method provided through the foregoing embodiment, the network equipment can continuously transmit 2 RAR messages, improve the success rate of message 2.Probability of the terminal device to the reception failure of RAR message caused by reducing because of channel quality.To achieve the purpose that reduce the resource consumption and power consumption of random access.
Fig. 1 is a kind of flow diagram of the method for random access that the embodiment of the present invention one provides；
Fig. 2 is the flow diagram of the method for another random access provided by Embodiment 2 of the present invention；
Fig. 3 is the flow diagram of the method for another random access that the embodiment of the present invention three provides；
Fig. 4 is the flow diagram of the method for another random access that the embodiment of the present invention four provides；
Fig. 5 is the flow diagram that five providing method of the embodiment of the present invention is realized in this terminal device and network equipment interaction；
Fig. 6 is the flow diagram that six providing method of the embodiment of the present invention is realized in this terminal device and network equipment interaction；
Fig. 7 is a kind of structural schematic diagram of the network equipment provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of terminal device provided in an embodiment of the present invention.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, following will be combined with the drawings in the embodiments of the present invention, and technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, shall fall within the protection scope of the present invention.
Realization approach of the invention is: in M2M system, terminal device is when initiating or re-initiating random access, it is possible that 2 or multiple terminal devices send same random number on same running time-frequency resource, the solution that cannot conflict in message 2 of multiple terminal devices in this way, all terminal devices think that the uplink assignment resource of message 2 is all to oneself and is sending message 3 above, because message 3 includes the unique identification of each terminal device, message 3 has very big probability conflict at this time, will re-initiate random access either with or without the terminal device for obtaining Conflict solving.And the conflict of this message 3 is relative to the conflict of message 1 that (different terminal equipment sends different random numbers on same running time-frequency resource, Conflict solving is done by message 2) more consume resource, and power consumption is bigger, because message 3 and message 4 all have HARQ mechanism.
In order to reduce the resource consumption and power consumption of random access, the conflict of message 3 will likely be appeared in scheme provided in an embodiment of the present invention, as far as possible be adjusted to conflict in message 1, so that the Conflict solving of message 1 can be realized using message 2.
The network equipment involved in the embodiment of the present invention, can be base station, perhaps access point or can be refers to the accession in net equipment on interface in the sky by one or more sectors and wireless terminal communications.The air frame that base station can be used for receive mutually is converted with IP grouping, as the router between wireless terminal and the rest part of access net, wherein the rest part for accessing net may include Internet protocol (IP) network.Attribute management of the base station also tunable to air interface.Such as, base station can be base station (the Base Transceiver Station in GSM or CDMA, BTS), it is also possible to the base station (NodeB) in WCDMA, it can also be evolved base station (eNB or the e-NodeB in LTE, evolutional Node B), the application does not limit.
The present embodiments relate to terminal device, user can be directed to, voice and/or data communication are provided
Property equipment, handheld device with wireless connecting function or be connected to other processing equipments of radio modem.Wireless terminal can be through wireless access network (Radio Access Network, RAN it) is communicated with one or more core net, wireless terminal can be mobile terminal, such as mobile phone (or be " honeycomb " phone) and the computer with mobile terminal, such as, can be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, they exchange language and/or data with wireless access network.Such as, personal communication service (Personal Communication Service, PCS) phone, wireless phone, Session initiation Protocol (SIP) phone, wireless local loop (Wireless Local Loop, WLL it) stands, the equipment such as personal digital assistant (Personal Digital Assistant, PDA).Wireless terminal is referred to as system, subscriber unit (Subscriber Unit), subscriber station (Subscriber Station), movement station (Mobile Station), mobile station (Mobile), distant station (Remote Station), access point (Access Point), remote terminal (Remote Terminal), access terminal (Access Terminal), user terminal (User Terminal), user agent (User Agent), user equipment (User Device), or user equipment (User Equipment).
The embodiment of the present invention is described in further detail with reference to the accompanying drawings of the specification.
Embodiment one
As shown in Figure 1, the embodiment of the present invention provides a kind of method of random access, implementation process this method based on network equipment side is specifically included:
Step 101, the random access request message of network equipment receiving terminal apparatus；
Step 102, the network equipment sends random access response RAR message at least twice in the set time period and is used for the terminal device to the terminal device, the RAR message and carries out random access；Wherein, the set period of time is that the network equipment receives the random access request message to the time sent between message 4
In this embodiment, it includes a variety of, the implementation of two kinds of optimizations presented below that the network equipment sends the mode of RAR message at least twice in the set time period:
Mode 1 continuously transmits the RAR message at least twice before receiving message 3；
The mode that the network equipment sends RAR message can be, and in the period of setting, and RAR message at least twice be sent on down control channel.Wherein, the specific can be that receive terminal device send RA Request message after 2 continuous PDCCH channels on or a period of time in multiple PDCCH channels on send RAR message.
Mode 2 sends RAR message after the random access request message for receiving terminal device for the first time, if not receiving the message 3 of terminal device transmission on the resource location of setting, sends the RAR message for the second time.
In mode 2, when terminal device determines whether message 3 receives successfully, it needs to be determined that whether terminal device uses HARQ mechanism to send maximum HARQ number in message 3 (Msg3) and HARQ mechanism, may is that according to the resource location that above-mentioned two condition is set
When the resource location that first receives message 3 is not received by message 3, then judge that message 3 does not receive success, the corresponding resource location set is the resource location of first reception message 3；
Message 3 is received when confiscating on the re-transmission position of message 3, then judges that message 3 does not receive success, the corresponding resource location set is the re-transmission position of message 3.
The method provided through the foregoing embodiment, the network equipment continuously transmit 2 RAR messages, improve the success rate of message 2.Probability of the terminal device to the reception failure of RAR message caused by reducing because of channel quality.
Further, even if terminal device is still retransmitted according to random number, does not account for avoiding the occurrence of same resource with the collision problem of random number because retransmitting during RACH in the scheme that the prior art provides.The method that the technology problem embodiment of the present invention provides, may further comprise:
Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI is added in the RAR message at least twice sent, the C-RNTI is used for when terminal device is using receiving the RAR message progress random access failure, initiating random access again, according to the C-RNTI initiating random access procedure.
The network equipment just adds C-RNTI when sending RAR message, to which terminal device is after having successfully received message 2, if subsequent need to re-initiate random access request, then random access request is re-initiated using the C-RNTI distributed in message 2, the identical probability of message 1 when accessing again is reduced, to reduce the collision probability of message 3.
In this embodiment, because the network equipment can send multiple message 2, in order to improve C-RNTI timeliness in the message 2 sent every time, then it is not identical can to add Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI in the RAR message at least twice for the network equipment.
Wherein, different C-RNTI is that the network equipment is obtained based on existing allocation algorithm, and details are not described herein for the specific acquisition modes of C-RNTI.
Embodiment two
As shown in Fig. 2, the embodiment of the present invention also provides the method for another random access, implementation process this method based on network equipment side is specifically included:
Step 201, the network equipment adds C-RNTI in the RAR message for being sent to the terminal device after receiving the random access request message of terminal device；
If the network equipment sends multiple RAR messages to terminal device, the mode based on previous embodiment adds C-RNTI in RAR message.
Step 202, the RAR message is sent to the terminal device；So that the terminal device random access failure utilizes the C-RNTI initiating random access procedure carried in the RAR message received when initiating random access again.
The network equipment just adds C-RNTI when sending RAR message, to which terminal device is after having successfully received message 2, if subsequent need to re-initiate random access request, then random access request is re-initiated using the C-RNTI distributed in message 2, the identical probability of message 1 when accessing again is reduced, to reduce the collision probability of message 3.
Embodiment three
As shown in figure 3, the embodiment of the present invention also provides the method for another random access, implementation process this method based on terminal equipment side is specifically included:
Step 301, terminal device sends random access request message to the network equipment using random number；
Step 302, the terminal device detects at least two RAR messages of network equipment transmission in the set time period；Random access is carried out according to any RAR message is received.
Description based on aforementioned network equipment side embodiment is it is found that network equipment side can be accomplished in several ways the transmission of message 2, so the detection of corresponding terminal equipment side receives the scheme of RAR message, specific implementation be may is that
Mode 1, the network equipment continuously transmits RAR message twice before message 3, then corresponding:
Terminal device detects at least two RAR messages for whether having the network equipment to continuously transmit in the set period of time.The set period of time is the certain period of time sent after random access request message；The specific period can be the time before the resource location for the transmission message 3 that transmission random access request message may be distributed to the network equipment of budget later.
Mode 2, the network equipment sends RAR message before and after message 3, then corresponding:
First RAR message whether detection has the network equipment to send in first time period；
If receiving first RAR message, then after sending message 3 corresponding with first RAR message, the message 4 that the network equipment is sent is detected whether, if detecting whether second RAR message that the network equipment is sent in second time period without the message 4.
Further, if the network equipment is added to C-RNTI when sending RAR message, then terminal device is after having successfully received message 2, if subsequent need to re-initiate random access request, the C-RNTI that distributes in message 2 be can use to re-initiate random access request, the identical probability of message 1 when accessing again is reduced, to reduce the collision probability of message 3.Specific implementation may is that
When UE random access failure, specific implementation includes: when initiating random access again
A1 determines target RAR message from least two RAR message；
Determine that the specific implementation of target RAR message may is that
Corresponding at least two C-RNTI is obtained from least two RAR message；If at least two C-RNTI is not identical, the RAR message that terminal device described at least two RAR message receives the latest is determined as target RAR message.
A2 obtains C-RNTI from the target RAR message, and re-initiates random access procedure using the C-RNTI.
Optionally, terminal device initiates random access specific implementation using the C-RNTI in RAR message again may is that
Terminal device is receiving first RAR message at the first time, receives second RAR message in the second time, and carry the first C-RNTI in first RAR message；The 2nd C-RNTI is carried in second RAR message；In the case where the second time being later than first time, terminal device then can re-initiate random access procedure using the 2nd C-RNTI when re-initiating random access.
Example IV
As shown in figure 4, the embodiment of the present invention also provides the method for another random access, this method is specifically included:
Step 401, after terminal device initiates random access request message using random number, the RAR message that the network equipment is sent is received；
Step 402, when terminal device random access failure, when initiating random access again, C-RNTI is obtained from the RAR message, and re-initiate random access procedure using the C-RNTI got.
In this embodiment, terminal device can be the multiple RAR messages that can receive network equipment transmission, and the C-RNTI being possible in each RAR message received is different from, terminal device is when selecting C-RNTI to re-initiate random access procedure, specific selection mode is identical with previous embodiment, and details are not described herein.
Embodiment five
As shown in Figure 5, in order to clearly illustrate scheme provided in an embodiment of the present invention in detail, the method of the embodiment of the present invention is described further below by way of terminal equipment side and the information exchange of network equipment side, in the example, the network equipment sends RAR message in setting time window twice in succession, to increase the transmission success rate of RAR, specific implementation be can be:
1) broadcast message of terminal device interception system obtains RACH channel configuration information, and according to information such as the covering grades of itself, selects corresponding RACH resource；
2) terminal device initiates random access request message using random number；
3) after the network equipment receives the random access request message that terminal device is sent, 2 RAR messages are continuously transmitted in a time window, wherein the distribution comprising C-RNTI and the scheduling information to message 3.2 RAR messages are all sent before the resource location that the network equipment distributes to the scheduling of message 3；
4) terminal device is attempted to receive RAR message in a period of time window, if having received a RAR message, stopping continues to RAR message, sends Msg3 according to the scheduling information in the RAR message received；If not receiving RAR message, random access is initiated with random number again.
5) terminal device sends Msg3 and Msg4, Msg3 is waited when not receiving Msg4, can repeatedly can to retransmit Msg3 according to HARQ mechanism；Terminal device can not also use HARQ mechanism to send Msg3.
6) network equipment sends contention resolution message Msg4 after receiving the Msg3 of terminal device.
If 7) terminal device does not receive Msg4, random access procedure need to be re-initiated, re-initiates random access procedure using the C-RNTI distributed in message 2.
Embodiment six
As shown in fig. 6, the network equipment sends RAR message before and after message 3 twice in the example, to increase the transmission success rate of RAR, specific implementation be can be:
1) broadcast message of terminal device interception system obtains RACH channel configuration information, and according to information such as the covering grades of itself, selects corresponding RACH resource:
2) terminal device initiates random access request message using random number；
3) after the network equipment receives the random access request message that terminal device is sent, first RAR message is continuously transmitted in a time window, wherein the distribution comprising C-RNTI and the scheduling information to message 3.
4) terminal device is attempted to receive RAR message in a period of time window, if having received a RAR message, sends Msg3 according to the scheduling information in the RAR message received；If not receiving RAR message, random access is initiated with random number again.
If 5) network equipment does not receive the Msg3 (or yet not receiving Msg3 on the position HARQ behind) of terminal device on the Msg3 resource location of scheduling, then think the transmission failure of message 2, the network equipment retransmits Msg2, redistributes ascending resource and C-RNTI.
6) terminal device sends Msg3 and waits Msg4 or Article 2 Msg2, if not receiving Msg4 but having received Article 2 Msg2, Msg3 then is retransmitted according to the scheduling information of Article 2 Msg2, and random access is re-initiated with the C-RNTI in first Msg2 if all not receiving.
7) after terminal device sends Msg3 according to Article 2 Msg2, if not receiving Msg4, random access is re-initiated with the C-RNTI of Article 2 Msg2.
Embodiment seven
As shown in fig. 7, providing a kind of network equipment for the embodiment of the present invention, for the network equipment for executing method corresponding to above-mentioned Fig. 1 and Fig. 5 and Fig. 6 network equipment, the specific network equipment may include receiving module 701 and sending module 702:
Receiving module 701, the random access request message for receiving terminal apparatus；
Sending module 702, for sending in the set time period, random access response RAR message is to the terminal device at least twice, and the RAR message is for terminal device progress random access；Wherein, the set period of time is that the receiving module receives the random access request message to the time sent between message 4.
Optionally, which is specifically used for continuously transmitting the RAR message twice before receiving module reception message to 3；Alternatively, if not receiving the message 3 of terminal device transmission on the resource location of setting, sending the RAR message for the second time for sending RAR message for the first time after the random access request message for receiving terminal device.
Optionally, which does not receive the resource location of setting of the message 3 of terminal device transmission and includes:
The resource location of first reception message 3；Or the re-transmission position of message 3.
Optionally, which was specifically used within the period of setting, and RAR message at least twice is sent on down control channel.
Optionally, the network equipment further include:
Processing module, for adding Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI in RAR message at least twice described in the transmission, the C-RNTI is used for when UE is using receiving the RAR message progress random access failure, initiating random access again, according to the C-RNTI initiating random access procedure.
Optionally, which is also used to add different C-RNTI in the RAR message at least twice.
The embodiment is device corresponding with embodiment one, so the effect that the embodiment is realized is identical as method shown in embodiment one, details are not described herein.
The function framework of the network equipment in the corresponding embodiment, the network equipment can be a kind of base station in practical applications, which has the function of realizing the base station behavior in practice of 1 method of embodiment.The function can also execute corresponding software realization by hardware realization by hardware.The hardware or software include one or more modules corresponding with above-mentioned function.
It include processor and transmitter in the structure of base station in a possible design, the processor is configured to base station is supported to execute corresponding function in the above method.The transmitter is used to support the communication between base station and UE, to information or instruction involved in the UE transmission above method.The base station is also
It may include memory, the memory saves the necessary program instruction in base station and data for coupling with processor.
Embodiment eight
The embodiment of the present invention also provides another network equipment, which includes:
Receiving module, the random access request message for receiving terminal apparatus；
Processing module, for adding C-RNTI in the RAR message for being sent to the terminal device；Wherein, when which initiates random access for second of the terminal device, the C-RNTI initiating random access procedure is utilized；
Sending module, for sending the RAR message to the terminal device.
Embodiment nine
As shown in figure 8, the embodiment of the present invention provides a kind of terminal device, for executing method corresponding to above-mentioned Fig. 3 and Fig. 5 and Fig. 6 terminal device, the specific network equipment may include: the terminal device
Sending module 801, for sending random access request message to the network equipment using random number；
Processing module 802, for detecting at least two RAR messages of network equipment transmission in the set time period；And random access is carried out according to any RAR message is received.
Optionally, the mode for sending RAR message based on the network equipment is different, so the used detection mode when detecting RAR message of processing module 802 is not also identical, so the specific implementation that processing module 802 detects at least two RAR messages of network equipment transmission in the set time period may is that
Mode one, the processing module 802 are at least two RAR messages for whether having the network equipment to continuously transmit in the set period of time to be detected；
Mode two, in this approach can may is that according to the corresponding detection for carrying out second RAR message of first RAR message for whether detecting that the network equipment is sent in first time period, specific implementation
The terminal device further includes receiving module, and the receiving module is for receiving first RAR message；
Sending module 801 is used for after receiving module receives first RAR message, to the network equipment
Send message 3 corresponding with first RAR message；
Processing module 802 is specifically used for the message 4 for detecting whether that the network equipment is sent, if detecting whether second RAR message that the network equipment is sent in second time period without the message 4.
Optionally, it is also used to for described 802 pieces of processing mould, when terminal device random access failure, target RAR message is determined from least two RAR message；C-RNTI is obtained from the target RAR message, and re-initiates random access procedure using the C-RNTI.
Optionally, the processing module 802 is specifically used for obtaining corresponding at least two C-RNTI from least two RAR message；If at least two C-RNTI is not identical, the RAR message that terminal device described at least two RAR message receives the latest is determined as target RAR message.
The embodiment is device corresponding with embodiment three, so the effect that the embodiment is realized is identical as method shown in embodiment three, details are not described herein.
Embodiment ten
The embodiment of the present invention also provides a kind of terminal device for realizing method shown in Fig. 4, comprising:
Sending module, for sending random access request message to the network equipment using random number；
AM access module, the RAR message sent for receiving the network equipment；When terminal device random access failure, when initiating random access again, C-RNTI is obtained from the RAR message, and re-initiate random access procedure using the C-RNTI got.
Seven to the network equipment provided by embodiment ten and terminal device based on the above embodiment, the embodiment of the invention also provides a kind of M2M systems, in actual realization, because terminal device shown in the network equipment shown in embodiment seven and embodiment nine is the distinct device for realizing same scheme, so the network equipment shown in embodiment seven is matched with terminal device shown in embodiment nine when carrying out the realization of specific method using M2M system provided by the embodiment of the present invention.Similarly embodiment eight and embodiment ten match.
Said one or multiple technical solutions in the embodiment of the present application, at least have the following technical effect that:
The method provided through the foregoing embodiment, the network equipment can continuously transmit 2 RAR messages, mention
The success rate of high message 2.Probability of the terminal device to the reception failure of RAR message caused by reducing because of channel quality.
The network equipment just adds C-RNTI when sending RAR message, to which terminal device is after having successfully received message 2, if subsequent need to re-initiate random access request, then random access request is re-initiated using the C-RNTI distributed in message 2, the identical probability of message 1 when accessing again is reduced, to reduce the collision probability of message 3.To achieve the purpose that reduce the resource consumption and power consumption of random access.
The present invention be referring to according to the method for the embodiment of the present invention, the flowchart and/or the block diagram of equipment (system) and computer program product describes.It should be understood that the combination of process and/or box in each flow and/or block and flowchart and/or the block diagram that can be realized by computer program instructions in flowchart and/or the block diagram.These computer program instructions be can provide to the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to generate a machine, so that generating by the instruction that computer or the processor of other programmable data processing devices execute for realizing the device for the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, to be able to guide in computer or other programmable data processing devices computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates the manufacture including command device, which realizes the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that series of operation steps are executed on a computer or other programmable device to generate computer implemented processing, thus the step of instruction executed on a computer or other programmable device is provided for realizing the function of specifying in one or more flows of the flowchart and/or one or more blocks of the block diagram.
Obviously, those skilled in the art various changes and modifications can be made to the invention without departing from the spirit and scope of the present invention.If then the present invention is also intended to include these modifications and variations in this way, these modifications and changes of the present invention is within the scope of the claims of the present invention and its equivalent technology.
Claims (23)
- A kind of method of random access characterized by comprisingThe random access request message of network equipment receiving terminal apparatus；The network equipment sends random access response RAR message at least twice in the set time period and is used for the terminal device to the terminal device, the RAR message and carries out random access；Wherein, the set period of time is that the network equipment receives the random access request message to the time sent between message 4.
- The method as described in claim 1, which is characterized in that sending RAR message at least twice in the set time period to the terminal device includes:The RAR message at least twice is continuously transmitted before receiving message 3；OrRAR message is sent for the first time after the random access request message for receiving terminal device, if not receiving the message 3 of terminal device transmission on the resource location of setting, sends the RAR message for the second time.
- Method according to claim 2, which is characterized in that the resource location of the setting includes:The resource location of first reception message 3；Or the re-transmission position of message 3.
- Method as described in claims 1 to 3 is any, which is characterized in that the RAR message at least twice that sends in the set time period includes: and RAR message at least twice to be sent on down control channel within the period of setting.
- Method as described in Claims 1 to 4 is any, it is characterized in that, this method further comprises adding Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI in RAR message at least twice described in the transmission, the C-RNTI is used for when terminal device is using receiving the RAR message progress random access failure, initiating random access again, according to the C-RNTI initiating random access procedure.
- Method as claimed in claim 5, which is characterized in that it is not identical that Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI is added in the RAR message at least twice.
- A kind of method of random access characterized by comprisingTerminal device sends random access request message to the network equipment using random number；The terminal device detects at least two RAR messages of network equipment transmission in the set time period；Random access is carried out according to any RAR message is received.
- The method of claim 7, which is characterized in that the terminal device detects at least two RAR messages that the network equipment is sent in the set time period and includes:The terminal device detects whether at least two RAR messages that the network equipment continuously transmits in the set period of time.
- The method of claim 7, which is characterized in that the terminal device detects at least two RAR messages that the network equipment is sent in the set time period and includes:First RAR message whether the terminal device detection has the network equipment to send in first time period；If receiving first RAR message, then the terminal device is after sending message 3 corresponding with first RAR message, detect whether the message 4 that the network equipment is sent, if detecting whether second RAR message that the network equipment is sent in second time period without the message 4.
- Method as described in claim 7~9, which is characterized in that this method further comprises:After the terminal device random access failure, target RAR message is determined from least two RAR message；C-RNTI is obtained from the target RAR message of the determination, and re-initiates random access procedure using the C-RNTI.
- Method as claimed in claim 10, which is characterized in that determine that target RAR message includes: from least two RAR messageCorresponding at least two C-RNTI is obtained from least two RAR message；If at least two C-RNTI is not identical, the RAR message that terminal device described at least two RAR message receives the latest is determined as target RAR message.
- A kind of network equipment, which is characterized in that the network equipment includes receiving module and sending module:The receiving module, the random access request message for receiving terminal apparatus；The sending module, for sending in the set time period, random access response RAR message is to the terminal device at least twice, and the RAR message is for terminal device progress random access；Wherein, the set period of time is that the receiving module receives the random access request message to the time sent between message 4.
- The network equipment as claimed in claim 12, which is characterized in that the sending module is specifically used for before the receiving module receives message 3, continuously transmits the RAR message twice；Alternatively, if not receiving the message 3 of terminal device transmission on the resource location of setting, sending the RAR message for the second time for sending RAR message for the first time after the random access request message for receiving terminal device.
- The network equipment as claimed in claim 13, which is characterized in that the resource location of the setting includes:The resource location of first reception message 3；Or the re-transmission position of message 3.
- The network equipment as described in claim 12~14 is any, which is characterized in that the sending module was specifically used within the period of setting, and RAR message at least twice is sent on down control channel.
- The network equipment as described in claim 12~15 is any, which is characterized in that the network equipment further include:Processing module, for adding Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI in RAR message at least twice described in the transmission, the C-RNTI is used for when UE is using receiving the RAR message progress random access failure, initiating random access again, according to the C-RNTI initiating random access procedure.
- The network equipment as claimed in claim 16, which is characterized in that the processing mould is also used to add different C-RNTI in the RAR message at least twice.
- A kind of terminal device characterized by comprisingSending module, for sending random access request message to the network equipment using random number；Processing module, for detecting at least two RAR messages of network equipment transmission in the set time period；And random access is carried out according to any RAR message is received.
- Terminal device as claimed in claim 18, which is characterized in that the processing module is specifically used at least two RAR messages whether detection has the network equipment to continuously transmit in the set period of time.
- Terminal device as claimed in claim 18, which is characterized in that the processing module is specifically used for first RAR message whether detection has the network equipment to send in first time period；The terminal device further includes receiving module, for receiving first RAR message；The sending module, for sending message 3 corresponding with first RAR message to the network equipment after receiving module receives first RAR message；The processing module is specifically used for the message 4 for detecting whether that the network equipment is sent, if detecting whether second RAR message that the network equipment is sent in second time period without the message 4.
- Terminal device as described in claim 18~20, which is characterized in that the processing module is also used to, and when terminal device random access failure, target RAR message is determined from least two RAR message；C-RNTI is obtained from the target RAR message, and re-initiates random access procedure using the C-RNTI.
- Terminal device as claimed in claim 21, which is characterized in that the processing module is specifically used for obtaining corresponding at least two C-RNTI from least two RAR message；If at least two C-RNTI is not identical, the RAR message that terminal device described at least two RAR message receives the latest is determined as target RAR message.
- A kind of M2M system, which is characterized in that including claim 12 to the claim 17 any network equipment and claim 18 to any terminal device of claim 22.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2016/077514 WO2017166023A1 (en) | 2016-03-28 | 2016-03-28 | Random access method and apparatus |
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| CN108353435A true CN108353435A (en) | 2018-07-31 |
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| WO (1) | WO2017166023A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112399570A (en) * | 2019-08-14 | 2021-02-23 | 大唐移动通信设备有限公司 | Resource allocation method and device |
| CN112738839A (en) * | 2019-10-14 | 2021-04-30 | 中国移动通信集团山西有限公司 | NB-IoT network capacity evaluation method, device, equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111601391A (en) * | 2019-02-21 | 2020-08-28 | 中国移动通信有限公司研究院 | Random access method, device, terminal and network side equipment |
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