CN104703289A

CN104703289A - Random access method, user equipment, base station and communication system

Info

Publication number: CN104703289A
Application number: CN201510111169.9A
Authority: CN
Inventors: 卢劭薇; 李军
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-03-13
Filing date: 2015-03-13
Publication date: 2015-06-10

Abstract

The embodiment of the invention discloses a random access method, user equipment, a base station and a communication system, and belongs to the technical field of mobile communication. The method comprises the following steps: receiving system information which carries AICH (acquisition indication channel) emitting time parameters; according to a mapping relationship between preset AICH emitting time parameters and a first time interval, determining a second time interval corresponding to the AICH emitting time parameters in the system information. According to the embodiment disclosed by the invention, when the AICH emitting time parameter in the system information is the second value, the second time value is two uplink access time slots, so that network access speed of UE (user equipment) with distance of 100KM to 200KM from the base station is increased; when the AICH emitting time parameter in the system information is the fourth value, the second time interval is three uplink access time slots, so that the base station can perform business within a relatively wide range.

Description

Accidental access method, subscriber equipment, base station and communication system

Technical field

The present invention relates to mobile communication technology field, particularly a kind of accidental access method, subscriber equipment, base station and communication system.

Background technology

Stochastic accessing refers to from subscriber equipment (User Equipment, be called for short " UE ") send lead code start to attempt access network to the process set up between network before basic signaling is connected, it is an important step of Universal Mobile Telecommunications System (Universal Mobile Telecommunications System is called for short " UMTS ") mobile communication.

In the random access procedure, UE is by ascending physical signal Random Access Channel (Physical RandomAccess Channel, be called for short " PRACH ") send lead code to base station, and base station can after the lead code receiving UE transmission, send access by descending AICH Acquisition Indication Channel (Acquisition Indication Channel is called for short " AICH ") to UE and catch instruction.Wherein, lead code the beginning of multi-upstream access time slot send, and access catch instruction send in the beginning of descending access slot.If UE, with the descending access slot of the identical timeslot number of multi-upstream access time slot residing for this lead code, receives the access responding this lead code and catches instruction, then UE can stop sending lead code, and sends random access message part to base station.

And in above-mentioned random access procedure, the time interval τ between the multi-upstream access time slot of identical timeslot number and descending access slot _p-a, indicated by AICH parameter launch time; Because lead code sends in the beginning of multi-upstream access time slot, and access catch instruction send in the beginning of descending access slot, so alternatively, AICH parameter launch time indicate UE from send lead code and catch time interval τ instruction to the access receiving this lead code of response _p-a.

Further, in existing protocol, when AICH parameter launch time is 0, τ _p-afor 7860chips; When AICH parameter launch time is 1, τ _p-afor 12800chips.Be on the basis of 78.125m in the distance of the optical transport of 1chip, can extrapolate, when AICH parameter launch time is 0, the radius of society R of the maximum support of base station is 100KM; When AICH parameter launch time is 1, the radius of society R of the maximum support of base station is 300KM.

Radius of society due to the maximum support of base station is 300KM, when UE is in outside the 300KM scope of base station, UE cannot in the descending AICH access slot of timeslot number identical with time slot residing for lead code, instruction is caught in the access receiving this lead code of response, Stochastic accessing cannot be completed, therefore communication service the scope outside 300KM cannot be carried out in base station; Due to AICH parameter launch time be 0 or 1 time, the radius of society of two maximum supports of base station is excessive at a distance of scope, make the timing relationship of the up-downgoing access channel of UE in distance base station 100KM to 200KM scope and the same in 200KM to the 300KM scope of distance base station, make apart from the UE in 100KM to the 200KM scope of base station in the random access procedure wait-receiving mode to access the time interval of catching instruction long.

Summary of the invention

In order to solve the setting due to AICH parameter launch time in existing protocol, communication service the scope outside 300KM cannot be carried out in the base station caused, and UE in distance base station 100KM to 200KM scope in the random access procedure wait-receiving mode access catch time interval of instruction long problem, embodiments provide a kind of accidental access method, subscriber equipment, base station and communication system.Described technical scheme is as follows:

First aspect, provides a kind of accidental access method, and described method comprises:

Receiving system message, described system message carries AICH Acquisition Indication Channel AICH parameter launch time;

According to AICH parameter launch time preset and the mapping relations at very first time interval, determine second time interval that AICH parameter launch time in described system message is corresponding, the described very first time is spaced apart user equipment (UE) from sending lead code to receiving the time interval accessed and catch instruction, the timeslot number that the residing descending access channel of instruction is caught in described access is identical with the timeslot number of the multi-upstream access channel residing for described lead code

Wherein, when launch time, parameter got the first numerical value to the AICH in described system message, described second time interval is 1.5 multi-upstream access time slots; When launch time, parameter got second value to the AICH in described system message, described second time interval is 2 multi-upstream access time slots; When launch time, parameter got third value to the AICH in described system message, described second time interval is 2.5 multi-upstream access time slots; When AICH parameter launch time in described system message gets the 4th numerical value, described second time interval is 3 multi-upstream access time slots.

Particularly, described method also comprises:

According to AICH parameter launch time preset and the mapping relations in the 3rd time interval, determine the 4th time interval that AICH parameter launch time in described system message is corresponding, described 3rd time interval is the minimum interval between the double transmission lead code of described UE

Wherein, when launch time, parameter got described first numerical value to the AICH in described system message, described 4th time interval is 3 multi-upstream access time slots; When launch time, parameter got described second value to the AICH in described system message, described 4th time interval is 3.5 multi-upstream access time slots; When launch time, parameter got described third value to the AICH in described system message, described 4th time interval is 4 multi-upstream access time slots; When AICH parameter launch time in described system message gets described 4th numerical value, described 4th time interval is 4.5 multi-upstream access time slots.

Particularly, described method also comprises:

According to AICH parameter launch time preset and the mapping relations in the 5th time interval, determine the 6th time interval that AICH parameter launch time in described system message is corresponding, described 5th time interval is the time interval that described UE sends random access message part and sends for the last time between lead code

Wherein, when launch time, parameter got described first numerical value to the AICH in described system message, described 6th time interval is 3 multi-upstream access time slots; When launch time, parameter got described second value to the AICH in described system message, described 6th time interval is 3.5 multi-upstream access time slots; When launch time, parameter got described third value to the AICH in described system message, described 6th time interval is 4 multi-upstream access time slots; When AICH parameter launch time in described system message gets described 4th numerical value, described 6th time interval is 4.5 multi-upstream access time slots.

Further, described system message is system information block SIB5.

Second aspect, provides a kind of accidental access method, and described method comprises:

Obtain AICH Acquisition Indication Channel AICH parameter launch time;

To user equipment (UE) transmitting system message, described system message carries described AICH parameter launch time, AICH parameter launch time in described system message is used to indicate very first time interval, the described very first time is spaced apart described UE from sending lead code to receiving the time interval accessed and catch instruction, the timeslot number that the residing descending access channel of instruction is caught in described access is identical with the timeslot number of the multi-upstream access channel residing for described lead code

Wherein, when launch time, parameter got the first numerical value to the AICH in described system message, the described very first time is spaced apart 1.5 multi-upstream access time slots; When launch time, parameter got second value to the AICH in described system message, the described very first time is spaced apart 2 multi-upstream access time slots; When launch time, parameter got third value to the AICH in described system message, the described very first time is spaced apart 2.5 multi-upstream access time slots; When AICH parameter launch time in described system message gets the 4th numerical value, the described very first time is spaced apart 3 multi-upstream access time slots.

Particularly, AICH parameter launch time in described system message was also used to indicate for second time interval, and described second time interval is the minimum interval between the double transmission lead code of described UE,

When launch time, parameter got described first numerical value to the AICH in described system message, described second time interval is 3 multi-upstream access time slots; When launch time, parameter got described second value to the AICH in described system message, described second time interval is 3.5 multi-upstream access time slots; When launch time, parameter got described third value to the AICH in described system message, described second time interval is 4 multi-upstream access time slots; When AICH parameter launch time in described system message gets described 4th numerical value, described second time interval is 4.5 multi-upstream access time slots.

Particularly, AICH parameter launch time in described system message was also used to indicate for the 3rd time interval, and described 3rd time interval is the time interval that described UE sends random access message part and sends for the last time between lead code,

Wherein, when launch time, parameter got described first numerical value to the AICH in described system message, described 3rd time interval is 3 multi-upstream access time slots; When launch time, parameter got described second value to the AICH in described system message, described 3rd time interval is 3.5 multi-upstream access time slots; When launch time, parameter got described third value to the AICH in described system message, described 3rd time interval is 4 multi-upstream access time slots; When AICH parameter launch time in described system message gets described 4th numerical value, described 3rd time interval is 4.5 multi-upstream access time slots.

The third aspect, provides a kind of subscriber equipment, and described subscriber equipment comprises:

Receiver module, for receiving system message, described system message carries AICH Acquisition Indication Channel AICH parameter launch time;

Determination module, for the mapping relations according to AICH parameter launch time preset and very first time interval, determine second time interval that AICH parameter launch time in described system message is corresponding, the described very first time is spaced apart user equipment (UE) from sending lead code to receiving the time interval accessed and catch instruction, the timeslot number that the residing descending access channel of instruction is caught in described access is identical with the timeslot number of the multi-upstream access channel residing for described lead code

Particularly, described determination module also for, according to AICH parameter launch time preset and the mapping relations in the 3rd time interval, determine the 4th time interval that AICH parameter launch time in described system message is corresponding, described 3rd time interval is the minimum interval between the double transmission lead code of described UE

Particularly, described determination module also for, according to AICH parameter launch time preset and the mapping relations in the 5th time interval, determine the 6th time interval that AICH parameter launch time in described system message is corresponding, described 5th time interval is the time interval that described UE sends random access message part and sends for the last time between lead code

Further, described system message is system information block SIB5.

Fourth aspect, provides a kind of base station, and described base station comprises:

Acquisition module, for obtaining AICH Acquisition Indication Channel AICH parameter launch time;

Sending module, for to user equipment (UE) transmitting system message, described system message carries described AICH parameter launch time, AICH parameter launch time in described system message is used to indicate very first time interval, the described very first time is spaced apart described UE from sending lead code to receiving the time interval accessed and catch instruction, the timeslot number that the residing descending access channel of instruction is caught in described access is identical with the timeslot number of the multi-upstream access channel residing for described lead code

5th aspect, provides a kind of subscriber equipment, and described subscriber equipment comprises: processor, memory, bus and communication interface; Described memory is for storing computer executed instructions, described processor is connected by described bus with described memory, when described computer run, described processor performs the described computer executed instructions that described memory stores, to make described computer execution method as described in relation to the first aspect.

6th aspect, provides a kind of base station, and described base station comprises: processor, memory, bus and communication interface; Described memory is for storing computer executed instructions, described processor is connected by described bus with described memory, when described computer run, described processor performs the described computer executed instructions that described memory stores, to make the method for described computer execution as described in second aspect.

7th aspect, provides a kind of communication system, and described system comprises the subscriber equipment as described in the third aspect, and the base station as described in fourth aspect.

Particularly, described system also comprises radio network controller (RNC), and described RNC is used for sending AICH Acquisition Indication Channel AICH parameter launch time to described base station.

The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:

By receiving system message, this system message carries AICH parameter launch time, and according to AICH parameter launch time preset and the mapping relations at very first time interval, determines second time interval that AICH parameter launch time in this system message is corresponding.This very first time is spaced apart UE from sending lead code to receiving the time interval accessed and catch instruction, and the timeslot number that the descending access slot of the residing descending access channel of instruction is caught in this access is identical with the timeslot number of the multi-upstream access time slot of the multi-upstream access channel residing for this lead code.Wherein, when AICH parameter launch time is the first numerical value, second time interval was 1.5 multi-upstream access time slots, and the radius of society of the maximum support in base station is 100KM; When launch time, parameter got second value to the AICH in system message, second time interval was 2 multi-upstream access time slots, and the radius of society of the maximum support in base station is 200KM; When AICH parameter launch time in system message gets the 4th numerical value, second time interval was 3 multi-upstream access time slots, and the radius of society of the maximum support in base station is 400KM.Due to when launch time, parameter got second value to the AICH in system message, second time interval was 2 multi-upstream access time slots, be less than in existing protocol, when AICH parameter launch time is 1, UE sends lead code for the last time and receives the time interval (i.e. 2.5 multi-upstream access time slots) accessed and catch between instruction, therefore UE is getting a promotion with network insertion speed when base station is in 100KM to the 200KM scope; Again due to when AICH parameter launch time in system message gets the 4th numerical value, the radius of society of the maximum support in base station is 400KM, be greater than in existing protocol, when AICH parameter launch time is 1, the radius of society 300KM of the maximum support in base station, can commence business in base station in farther scope (300KM to 400KM).

Accompanying drawing explanation

In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is a kind of application scenarios schematic diagram that the embodiment of the present invention provides;

Fig. 2 is the flow chart of a kind of accidental access method that the embodiment of the present invention one provides;

Fig. 3 is the flow chart of a kind of accidental access method that the embodiment of the present invention two provides;

Fig. 4 is the information interaction figure of a kind of Stochastic accessing that the embodiment of the present invention three provides;

Fig. 5 is the timing relationship schematic diagram of a kind of PRACH and AICH that the embodiment of the present invention three provides;

Fig. 6 is the structural representation of a kind of subscriber equipment that the embodiment of the present invention four provides;

Fig. 7 is the structural representation of a kind of base station that the embodiment of the present invention five provides;

Fig. 8 is the structural representation of a kind of subscriber equipment that the embodiment of the present invention six provides;

Fig. 9 is the structural representation of a kind of base station that the embodiment of the present invention seven provides;

Figure 10 is the structural representation of a kind of communication system that the embodiment of the present invention eight provides.

Embodiment

For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.

The embodiment of the present invention is applicable to Universal Mobile Telecommunications System (Universal MobileTelecommunications System, be called for short " UMTS "), residing application scenarios as shown in Figure 1, see Fig. 1, in this application scenarios, when radio network controller (Radio Network Controller, abbreviation " RNC ") 103 Hui communities are set up, send AICH parameter launch time to base station 102; When Cell searching is carried out in UE101 start, AICH parameter launch time configured is sent to UE101 by system information by base station 102 by RNC103, and UE101, after receiving system information, starts to carry out Stochastic accessing.In the random access procedure, UE101 determines by the system information received the moment sending lead code, and determining that moment of instruction is caught in the access receiving response UE101 simultaneously, UE101 sends lead code according to the above-mentioned moment determined to base station 102 and receives access and catches instruction.

Embodiment one

Embodiments provide a kind of accidental access method, see Fig. 2, the method can be performed by UE, and the method comprises:

Step S11, receiving system message, this system message carries AICH parameter launch time.

In the present embodiment, this system message sends to UE by radio network controller (Radio Network Controller is called for short " RNC ") by base station.Particularly, this system message can be system information block (System Information Block is called for short " SIB ") 5.

Step S12, according to AICH parameter launch time preset and the mapping relations at very first time interval, determine second time interval that AICH parameter launch time in this system message is corresponding, this very first time is spaced apart UE from sending lead code to receiving the time interval accessed and catch instruction, the timeslot number that the residing descending access channel of instruction is caught in this access is identical with the timeslot number of the multi-upstream access channel residing for this lead code

Wherein, when launch time, parameter got the first numerical value to the AICH in system message, second time interval was 1.5 multi-upstream access time slots, when launch time, parameter got second value to the AICH in system message, second time interval was 2 multi-upstream access time slots, when launch time, parameter got third value to the AICH in system message, second time interval was 2.5 multi-upstream access time slots, when AICH parameter launch time in system message gets the 4th numerical value, second time interval was 3 multi-upstream access time slots.

It should be noted that, in SIB5, the length of AICH parameter field launch time is 8bit, in existing protocol, AICH parameter launch time is 0 or 1, and the 1bit only employed in this field represents, therefore can expand on the basis that AICH parameter launch time is 0 or 1, such as, the first numerical value, second value, third value and the 4th numerical value can be set to 0,1,2 and 3 respectively, use the 2bit in this field to represent.

In the present embodiment, AICH parameter launch time is used to indicate very first time interval, namely UE is from sending lead code to receiving the time interval accessed and catch instruction, wherein, this access is caught and is indicated the timeslot number of the descending access slot of residing descending access channel identical with the timeslot number of the multi-upstream access time slot of the multi-upstream access channel residing for this lead code.It should be noted that, in very first time interval, the lead code that UE sends completes the transmission from UE to base station; Base station through relevant treatment, can send access to UE and catch instruction after receiving lead code; The transmission indicating and complete from base station to UE is caught in the access that base station sends.Wherein, catching instruction due to lead code and access is all that transmission speed is identical by radio wave transmissions, therefore lead code completes transmission time from UE to base station catches with access and indicated the transmission time from base station to UE identical.

In actual applications, 1 multi-upstream access time slot length is 5120chips, and 1 descending access slot length is also 5120chips.

In the present embodiment, according to the very first time interval of AICH parameter launch time instruction, the radius of society of the maximum support in base station can be extrapolated.Concrete reckoning process is as follows:

First, according to formula 2*T+ τ _g=τ _p-a-τ _pcan calculate T, wherein, T is that lead code is transferred to the time interval of base station from UE, τ _p-afor the time interval (i.e. very first time interval) between instruction and the lead code of launching for the last time is caught in access; τ _pfor the time interval that lead code itself takies, its size is 4096chips; τ _gfor the time interval that optical fiber takies altogether to the propagation delay time of base band and reserved base station processing time, its size is 1024chips;

Then, assuming that the radio velocity of wave propagation between UE and base station is vacuum propagation velocity ideally, be the light velocity, and then be 78.125m according to the distance of the optical transport of 1chip, the radius of society R of the maximum support of base station can be conversed.

In the present embodiment, when AICH parameter launch time is the first numerical value, second time interval was 1.5 multi-upstream access time slots, i.e. τ _p-afor 7680chips, then according to above-mentioned formula 2*T+ τ _g=τ _p-a-τ _pcan calculate T is 1280chips, and the radius of society R of the maximum support in base station is 100KM.

When AICH parameter launch time is second value, second time interval was 2 multi-upstream access time slots, i.e. τ _p-afor 10240chips, the radius of society R of the maximum support in base station is 200KM.

When AICH parameter launch time is third value, second time interval was 2.5 multi-upstream access time slots, i.e. τ _p-afor 12800chips, the radius of society R of the maximum support in base station is 300KM.

When AICH parameter launch time is the 4th numerical value, second time interval was 3 multi-upstream access time slots, i.e. τ _p-afor 15360chips, the radius of society R of the maximum support in base station is 400KM.

Can be known by above-mentioned, when AICH parameter launch time is the 4th numerical value, the radius of society R of the maximum support in base station is 400KM, be greater than in existing protocol, when AICH parameter launch time is 1, the radius of society (300KM) of the maximum support in base station, therefore can commence business in base station in farther scope.

When AICH parameter launch time is second value, the radius of society R of the maximum support in base station is 200KM.When UE to be in base station in 100KM to the 200KM scope, UE sends lead code for the last time and receives that to access the time interval of catching between instruction be 2 multi-upstream access time slots, be less than in existing protocol, when AICH parameter launch time is 1, UE sends lead code for the last time and receives the time interval (2.5 multi-upstream access time slots) accessed and catch between instruction, therefore the speed of UE access network gets a promotion.

The embodiment of the present invention is by receiving system message, this system message carries AICH parameter launch time, and according to AICH parameter launch time preset and the mapping relations at very first time interval, determine second time interval that AICH parameter launch time in this system message is corresponding.This very first time is spaced apart UE from sending lead code to receiving the time interval accessed and catch instruction, and the timeslot number that the descending access slot of the residing descending access channel of instruction is caught in this access is identical with the timeslot number of the multi-upstream access time slot of the multi-upstream access channel residing for this lead code.Wherein, when AICH parameter launch time is the first numerical value, second time interval was 1.5 multi-upstream access time slots, and the radius of society of the maximum support in base station is 100KM; When launch time, parameter got second value to the AICH in system message, second time interval was 2 multi-upstream access time slots, and the radius of society of the maximum support in base station is 200KM; When AICH parameter launch time in system message gets the 4th numerical value, second time interval was 3 multi-upstream access time slots, and the radius of society of the maximum support in base station is 400KM.Due to when launch time, parameter got second value to the AICH in system message, second time interval was 2 multi-upstream access time slots, be less than in existing protocol, when AICH parameter launch time is 1, UE sends lead code for the last time and receives the time interval (i.e. 2.5 multi-upstream access time slots) accessed and catch between instruction, therefore UE is getting a promotion with network insertion speed when base station is in 100KM to the 200KM scope; Again due to when AICH parameter launch time in system message gets the 4th numerical value, the radius of society of the maximum support in base station is 400KM, be greater than in existing protocol, when AICH parameter launch time is 1, the radius of society 300KM of the maximum support in base station, can commence business in base station in farther scope (300KM to 400KM).

Embodiment two

Embodiments provide a kind of accidental access method, see Fig. 3, the method can be performed by base station, and the method comprises:

Step S21, obtains AICH parameter launch time.

In the present embodiment, when the community of random access procedure is set up, RNC can send AICH parameter launch time to base station, and base station receives and stores AICH parameter launch time.

Step S22, to UE transmitting system message, this system message carries AICH parameter launch time, AICH parameter launch time in system message is used to indicate very first time interval, this very first time is spaced apart UE from sending lead code to receiving the time interval accessed and catch instruction, the timeslot number that the residing descending access channel of instruction is caught in this access is identical with the timeslot number of the multi-upstream access channel residing for this lead code

Wherein, when launch time, parameter got the first numerical value to the AICH in system message, the very first time is spaced apart 1.5 multi-upstream access time slots; When launch time, parameter got second value to the AICH in system message, the very first time is spaced apart 2 multi-upstream access time slots; When launch time, parameter got third value to the AICH in system message, the very first time is spaced apart 2.5 multi-upstream access time slots; When AICH parameter launch time in system message gets the 4th numerical value, the very first time is spaced apart 3 multi-upstream access time slots.

In the present embodiment, this system message can be system information block SIB5.

In the present embodiment, when UE carries out Cell searching, system information broadcast can be passed through in base station, and AICH parameter launch time is sent to UE.

In the present embodiment, AICH parameter launch time is used to indicate very first time interval, namely UE is from sending lead code to receiving the time interval accessed and catch instruction, wherein, this access is caught and is indicated the timeslot number of the descending access slot of residing descending access channel identical with the timeslot number of the multi-upstream access time slot of the multi-upstream access channel residing for this lead code.

Embodiment three

Embodiments provide a kind of accidental access method, see Fig. 4, the method comprises:

Step S31, base station obtains AICH parameter launch time.

Step S32, base station is to UE transmitting system message, and this system message carries AICH parameter launch time.

In the present embodiment, when UE carries out Cell searching, base station can be passed through broadcast channel (BroadcastChannel is called for short " BCH ") and the system information carrying AICH parameter launch time is sent to UE.

Particularly, this system message can be system information block SIB5.It should be noted that, in SIB5, the length of AICH parameter field launch time is 8bit, in existing protocol, AICH parameter launch time is 0 or 1, and the 1bit only employed in this field represents, therefore can expand on the basis that AICH parameter launch time is 0 or 1, such as, the first numerical value, second value, third value and the 4th numerical value can be set to 0,1,2 and 3 respectively, use the 2bit in this field to represent.

Step S33, UE is according to AICH parameter launch time preset and the mapping relations at very first time interval, determine second time interval that AICH parameter launch time in this system message is corresponding, this very first time is spaced apart UE from sending lead code to receiving the time interval accessed and catch instruction, the timeslot number that the residing descending access channel of instruction is caught in this access is identical with the timeslot number of the multi-upstream access channel residing for this lead code

In actual applications, 1 multi-upstream access time slot length is 5120chips, and 1 multi-upstream access time slot length is also 5120chips.

Can be known by above-mentioned, when AICH parameter launch time is the 4th numerical value, the radius of society R of the maximum support in base station is 400KM, be greater than in existing protocol, when AICH parameter launch time is 1, the radius of society (300KM) of the maximum support in base station, therefore can commence business in base station in farther scope.In actual applications, can be applied in off-lying sea or jungle scene, the urgent call only in support circuit-switched (Circuit Switch is called for short " CS ") business.In addition, in order to UE access network in 300KM to 400KM scope can be realized, special PRACH power control parameters can be configured simultaneously.Particularly, improve Initial Trans and increase lead code number of attempt, such as: lead code number of attempt can be set to 8-12 time.

When AICH parameter launch time is second value, the radius of society R of the maximum support in base station is 200KM.When UE to be in base station in 100KM to the 200KM scope, UE sends lead code for the last time and receives that to access the time interval of catching between instruction be 2 multi-upstream access time slots, be less than in existing protocol, when AICH parameter launch time is 1, UE sends lead code for the last time and receives the time interval (2.5 multi-upstream access time slots) accessed and catch between instruction, therefore the speed of UE access network gets a promotion.In actual applications, can be applied in the scene of coastal waters, can support voice calling and basic data transmission service.

In addition, in actual applications, human-computer interaction interface can also be set at RNC place, customer selecting contextual model and the service corresponding with this contextual model is facilitated by providing visual switch at human-computer interaction interface, such as, be the situation of second value for AICH parameter launch time, at human-computer interaction interface for client provides coastal waters scene mode, and audio call and basic data transmission service can be equipped with under this coastal waters scene mode; For the situation that AICH parameter launch time is the 4th numerical value, at human-computer interaction interface for client provides super replace mode far away, and emergence call service can be equipped with in this mode.

Step S34, UE is according to AICH parameter launch time preset and the mapping relations in the 3rd time interval, in the 4th time interval that AICH parameter launch time in certainty annuity message is corresponding, the 3rd time interval was the minimum interval between the double transmission lead code of UE

Wherein, when launch time, parameter got the first numerical value to the AICH in system message, 4th time interval was 3 multi-upstream access time slots, when launch time, parameter got second value to the AICH in system message, 4th time interval was 3.5 multi-upstream access time slots, when launch time, parameter got third value to the AICH in system message, 4th time interval was 4 multi-upstream access time slots, when AICH parameter launch time in system message gets the 4th numerical value, the 4th time interval was 4.5 multi-upstream access time slots.

Step S35, UE is according to AICH parameter launch time preset and the mapping relations in the 5th time interval, the 6th time interval that AICH parameter launch time in certainty annuity message is corresponding, 5th time interval was the time interval that UE sends random access message part and sends for the last time between lead code

Wherein, when launch time, parameter got the first numerical value to the AICH in system message, 6th time interval was 3 multi-upstream access time slots, when launch time, parameter got second value to the AICH in system message, 6th time interval was 3.5 multi-upstream access time slots, when launch time, parameter got third value to the AICH in system message, 6th time interval was 4 multi-upstream access time slots, when AICH parameter launch time in system message gets the 4th numerical value, the 6th time interval was 4.5 multi-upstream access time slots.

In the present embodiment, the last lead code that sends refers to sent lead code for the last time before UE sends random access message part.

It should be noted that, in the present embodiment, step S33, step S34 and step S35 be order in no particular order.

Below in conjunction with Fig. 5, brief description is very first time interval, the 3rd time interval and the 5th time interval once:

Fig. 5 provides the schematic diagram of the timing relationship of a kind of PRACH and AICH seen from the angle of UE, and wherein, PRACH is up channel, and AICH is down channel.In the random access procedure, UE sends lead code by up PRACH to base station, if UE needs repeatedly to send lead code, then UE can select available multi-upstream access time slot at random on up PRACH, and send lead code in the beginning of this multi-upstream access time slot, the τ in Fig. 5 _p-pwhat represent is minimum interval (i.e. the 3rd time interval) between the double transmission lead code of UE; After UE have sent leading character, UE in the descending AICH access slot identical with the timeslot number of PRACH residing for this lead code, can judge whether that receiving access catches instruction, the τ in Fig. 5 _p-awhat represent is, UE is from sending lead code to receiving the time interval (i.e. very first time interval) accessed and catch instruction, wherein, this access is caught and is indicated the timeslot number of the descending access slot of residing up PRACH identical with the timeslot number of the multi-upstream access time slot of the descending AICH residing for this lead code; When UE receive access catch instruction time, UE can send random access message part to base station, the τ in Fig. 5 _p-mwhat represent is the time interval (i.e. the 5th time interval) that UE sends random access message part and sends for the last time between lead code.

Step S36, UE send lead code to base station.

Particularly, UE can send lead code by up PRACH to base station, and the transmission of lead code is only carried out in the beginning of the multi-upstream access time slot of up PRACH.

Step S37, instruction is caught in the access that base station sends this UE of response to UE.

Particularly, base station, after receiving lead code, can send by descending AICH the access responding this lead code and catch instruction, and the timeslot number that the residing descending AICH of instruction is caught in this access is the same with the timeslot number of up PRACH residing for this lead code.

Step S38, UE, according to second time interval, in the descending AICH access slot identical with the timeslot number of PRACH up residing for lead code, judge whether that receiving access catches instruction.

If UE is in the descending AICH access slot identical with the timeslot number of PRACH up residing for lead code, instruction is caught in the access not receiving response UE, then perform step S39; If UE is in the descending AICH access slot identical with the timeslot number of PRACH up residing for lead code, instruction is caught in the access receiving response UE, then perform step S40.

Step S39, UE, according to the 4th time interval, continue to send lead code to base station.

In the present embodiment, if UE is in the descending AICH access slot identical with the timeslot number of PRACH up residing for lead code, fails to receive access and catch instruction, can continue to attempt sending lead code to base station, and each power sending lead code all can increase.

Particularly, system message, while carrying AICH parameter launch time, also carries the initial preamble transmitted power corresponding with AICH parameter launch time, the power ramp factor and lead code maximum retransmission etc.When UE is in the descending AICH access slot identical with the timeslot number of PRACH up residing for lead code, fail to receive access when catching instruction, the multi-upstream access time slot that UE meeting Stochastic choice is next available, to continue to send lead code to base station, the transmitted power of this lead code is determined according to the power ramp factor, and lead code retransmission counter is subtracted one.When lead code retransmission counter numerical value is greater than 0, UE can also continue to send lead code to base station; When lead code retransmission counter numerical value equals 0, UE exits random access procedure.

In the present embodiment, after executing S39, continue to perform from step S36.

Step S40, UE, according to the 6th time interval, send random access message part to base station.

In the present embodiment, UE sends random access message part to base station, and random access procedure completes, UE can and base station between mutual pass-along message.Wherein, the information spinner of random access message part carrying will comprise the flag information of UE and the service type etc. of application.

Embodiment four

Embodiments provide a kind of subscriber equipment, see Fig. 6, this subscriber equipment comprises: receiver module 401 and determination module 402.

Wherein, receiver module 401, for receiving system message, this system message carries AICH parameter launch time.

In the present embodiment, this system message sends to UE by RNC by base station.Particularly, this system message can be SIB5.

Determination module 402, for the mapping relations according to AICH parameter launch time preset and very first time interval, determine second time interval that AICH parameter launch time in this system message is corresponding, this very first time is spaced apart UE from sending lead code to receiving the time interval accessed and catch instruction, the timeslot number that the residing descending access channel of instruction is caught in this access is identical with the timeslot number of the multi-upstream access channel residing for this lead code

Particularly, determination module 402, also for according to preset AICH parameter launch time and the mapping relations in the 3rd time interval, the 4th time interval that AICH parameter launch time in certainty annuity message is corresponding, 3rd time interval was the minimum interval between the double transmission lead code of UE

Wherein, when launch time, parameter got the first numerical value to the AICH in system message, the 4th time interval was 3 multi-upstream access time slots; When launch time, parameter got second value to the AICH in system message, the 4th time interval was 3.5 multi-upstream access time slots; When launch time, parameter got third value to the AICH in system message, the 4th time interval was 4 multi-upstream access time slots; When AICH parameter launch time in system message gets the 4th numerical value, the 4th time interval was 4.5 multi-upstream access time slots.

Particularly, determination module 402 also for, according to AICH parameter launch time preset and the mapping relations in the 5th time interval, the 6th time interval that AICH parameter launch time in certainty annuity message is corresponding, 5th time interval was the time interval that UE sends random access message part and sends for the last time between lead code

Wherein, when launch time, parameter got the first numerical value to the AICH in system message, the 6th time interval was 3 multi-upstream access time slots; When launch time, parameter got second value to the AICH in system message, the 6th time interval was 3.5 multi-upstream access time slots; When launch time, parameter got third value to the AICH in system message, the 6th time interval was 4 multi-upstream access time slots; When AICH parameter launch time in system message gets the 4th numerical value, the 6th time interval was 4.5 multi-upstream access time slots.

Further, system message is system information block SIB5.

Embodiment five

Embodiments provide a kind of base station, see Fig. 7, this base station comprises: acquisition module 501 and sending module 502.

Wherein, acquisition module 501, for obtaining AICH parameter launch time.

Sending module 502, for to UE transmitting system message, this system message carries AICH parameter launch time, AICH parameter launch time in system message is used to indicate very first time interval, this very first time is spaced apart UE from sending lead code to receiving the time interval accessed and catch instruction, the timeslot number that the residing descending access channel of instruction is caught in this access is identical with the timeslot number of the multi-upstream access channel residing for this lead code

Particularly, AICH parameter launch time in system message was also used to indicate for second time interval, and this second time interval is the minimum interval between the double transmission lead code of UE,

When launch time, parameter got the first numerical value to the AICH in system message, second time interval was 3 multi-upstream access time slots; When launch time, parameter got second value to the AICH in system message, second time interval was 3.5 multi-upstream access time slots; When launch time, parameter got third value to the AICH in system message, second time interval was 4 multi-upstream access time slots; When AICH parameter launch time in system message gets the 4th numerical value, second time interval was 4.5 multi-upstream access time slots.

Particularly, AICH parameter launch time in system message was also used to indicate for the 3rd time interval, and the 3rd time interval was the time interval that UE sends random access message part and sends for the last time between lead code,

Wherein, when launch time, parameter got the first numerical value to the AICH in system message, the 3rd time interval was 3 multi-upstream access time slots; When launch time, parameter got second value to the AICH in system message, the 3rd time interval was 3.5 multi-upstream access time slots; When launch time, parameter got third value to the AICH in system message, the 3rd time interval was 4 multi-upstream access time slots; When AICH parameter launch time in system message gets the 4th numerical value, the 3rd time interval was 4.5 multi-upstream access time slots.

It should be noted that the very first time interval in the present embodiment, second time interval and the 3rd time interval are equivalent to second time interval in embodiment three, the 4th time interval and the 6th time interval.

Embodiment six

Embodiments provide a kind of subscriber equipment, see Fig. 8, this back end comprises:

Processor 601, memory 602, bus 603 and communication interface 604; This memory 602 is for storing computer executed instructions, processor 601 is connected by bus 603 with memory 602, when computer run, the computer executed instructions that processor 601 execute store stores, to make the method described in computer execution embodiment one or embodiment three.

Embodiment seven

Embodiments provide a kind of base station, see Fig. 9, this back end comprises:

Processor 701, memory 702, bus 703 and communication interface 704; This memory 702 is for storing computer executed instructions, processor 701 is connected by bus 703 with memory 702, when computer run, the computer executed instructions that processor 701 execute store stores, to make the method described in computer execution embodiment two or embodiment three.

Embodiment eight

Embodiments provide a kind of communication system, see Figure 10, this system comprises: the subscriber equipment 40 as described in embodiment four and the base station as described in embodiment five 50.

Particularly, this system also comprises: RNC60, and this RNC60 is used for sending AICH parameter launch time to base station 50.

Further, RNC60 can also be used for configuring contextual model and the service corresponding with this contextual model.In actual applications, human-computer interaction interface can be set at RNC60 place, facilitate customer selecting contextual model and the service corresponding with this contextual model by providing visual switch at human-computer interaction interface.Such as, be the situation of second value for AICH parameter launch time, at human-computer interaction interface for client provides coastal waters scene mode, and audio call and basic data transmission service can be equipped with under this coastal waters scene mode; For the situation that AICH parameter launch time is the 4th numerical value, at human-computer interaction interface for client provides super replace mode far away, and emergence call service can be equipped with in this mode.

The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.

It should be noted that: the subscriber equipment that above-described embodiment provides is when realizing accidental access method, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, internal structure by equipment is divided into different functional modules, to complete all or part of function described above.In addition, the subscriber equipment that above-described embodiment provides and accidental access method embodiment belong to same design, and its specific implementation process refers to embodiment of the method, repeats no more here.

One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can have been come by hardware, the hardware that also can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, the above-mentioned storage medium mentioned can be read-only memory, disk or CD etc.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. an accidental access method, is characterized in that, described method comprises:

2. method according to claim 1, is characterized in that, described method also comprises:

3. method according to claim 1, is characterized in that, described method also comprises:

4. the method according to any one of claim 1-3, is characterized in that, described system message is system information block SIB5.

5. an accidental access method, is characterized in that, described method comprises:

Obtain AICH Acquisition Indication Channel AICH parameter launch time;

6. method according to claim 5, is characterized in that, AICH parameter launch time in described system message was also used to indicate for second time interval, and described second time interval is the minimum interval between the double transmission lead code of described UE,

7. method according to claim 5, it is characterized in that, AICH parameter launch time in described system message was also used to indicate for the 3rd time interval, and described 3rd time interval is the time interval that described UE sends random access message part and sends for the last time between lead code

8. a subscriber equipment, is characterized in that, described subscriber equipment comprises:

9. subscriber equipment according to claim 8, it is characterized in that, described determination module also for, according to AICH parameter launch time preset and the mapping relations in the 3rd time interval, determine the 4th time interval that AICH parameter launch time in described system message is corresponding, described 3rd time interval is the minimum interval between the double transmission lead code of described UE

10. subscriber equipment according to claim 8, it is characterized in that, described determination module also for, according to AICH parameter launch time preset and the mapping relations in the 5th time interval, determine the 6th time interval that AICH parameter launch time in described system message is corresponding, described 5th time interval is the time interval that described UE sends random access message part and sends for the last time between lead code

11. subscriber equipmenies according to Claim 8 described in-10 any one, it is characterized in that, described system message is system information block SIB5.

12. 1 kinds of base stations, is characterized in that, described base station comprises:

13. base stations according to claim 12, is characterized in that, AICH parameter launch time in described system message was also used to indicate for second time interval, and described second time interval is the minimum interval between the double transmission lead code of described UE,

14. base stations according to claim 12, it is characterized in that, AICH parameter launch time in described system message was also used to indicate for the 3rd time interval, and described 3rd time interval is the time interval that described UE sends random access message part and sends for the last time between lead code

15. 1 kinds of subscriber equipmenies, is characterized in that, described subscriber equipment comprises:

Processor, memory, bus and communication interface; Described memory is for storing computer executed instructions, described processor is connected by described bus with described memory, when described computer run, described processor performs the described computer executed instructions that described memory stores, to make the method for described computer execution as described in any one of Claims 1 to 4.

16. 1 kinds of base stations, is characterized in that, described base station comprises:

Processor, memory, bus and communication interface; Described memory is for storing computer executed instructions, described processor is connected by described bus with described memory, when described computer run, described processor performs the described computer executed instructions that described memory stores, to make the method for described computer execution as described in any one of claim 5 ~ 7.

17. 1 kinds of communication systems, is characterized in that, described system comprises the subscriber equipment as described in any one of claim 8 ~ 11, and the base station as described in any one of claim 12 ~ 14.

18. systems according to claim 17, is characterized in that, described system also comprises: radio network controller (RNC), and described RNC is used for sending AICH Acquisition Indication Channel AICH parameter launch time to described base station.