CN103458530B - Random access method and user equipment - Google Patents
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- CN103458530B CN103458530B CN201310400197.3A CN201310400197A CN103458530B CN 103458530 B CN103458530 B CN 103458530B CN 201310400197 A CN201310400197 A CN 201310400197A CN 103458530 B CN103458530 B CN 103458530B
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Abstract
An embodiment of the invention provides a random access method and user equipment. The random access method comprises the steps of determining main CPICH transmitting power and determining ascending interference; measuring CPICH signal code receiving power; determining a power regulating value according to transmitting speed of a random access message; determining the transmitting power of the random access message according to the main CPICH transmitting power, the ascending interference, the CPICH signal code receiving power and the power regulating value; executing a random access process according to the transmitting power of the random access message. According to the embodiment of the random access method and the user equipment, the power regulating value is determined according to the transmitting speed of the random access message, the power regulating value is considered when the transmitting power of the random access message is determined, therefore, the situation that the random access message can be received by a base station can be guaranteed to the greatest extent, and efficiency of random access is improved.
Description
Technical field
The present embodiments relate to wireless communication field, and more particularly, to accidental access method and user equipment.
Background technology
Third generation partner program (3gpp, 3rd generation partnership project) defines at random
Access procedure, completes the transmission of random accessing message by the process that initial power and leading (preamble) attempt climbing.
Specifically, user equipment (ue, user equipment) provides according to base station system information and ue oneself measurement
Primary Common Pilot Channel (primary cpich, primary common pilot channel) received signal code power
(rscp, received signal code power), determines leading initial power (preamble_initial_power),
And according to this initial power transmitting random accessing message to carry out Stochastic accessing.When this random access failure is (for example due to sending out
Penetrate power too low and so that base station does not receive random accessing message) when, ue can attempt the transmitting work(of random accessing message that climbs
Rate, and launch random accessing message again according to the transmission power after climbing.Ue repeats such transmitting-power and climbed
Journey, until Stochastic accessing success.
As can be seen here, ue can only determine the transmission power of random accessing message according to system information and rscp, so determines
Leading initial power possibly inappropriate.In the case, even if leading initial power is improper, ue also can only progressively carry
High emission power, till reaching suitable transmission power.Such power process of climbing may ratio relatively time-consuming, have impact on and connect
Enter the time delay of process.
Content of the invention
The embodiment of the present invention provides a kind of accidental access method and user equipment, it is possible to increase the efficiency of Stochastic accessing.
First aspect, there is provided a kind of accidental access method, comprising: determine Primary Common Pilot Channel cpich transmission power,
And determine uplink interference；Measurement cpich received signal code power；Determine that power adjusts according to the transmission rate of random accessing message
Value；Determine that Stochastic accessing disappears according to main cpich transmission power, uplink interference, cpich received signal code power and power adjustment
The transmission power of breath；Transmission power according to random accessing message executes random access procedure.
In conjunction with a first aspect, in a kind of implementation of first aspect, according to main cpich transmission power, uplink interference,
Cpich received signal code power and power adjustment determine the transmission power of random accessing message, comprising: determine according to the following formula with
Machine accesses the transmission power of message,
P=uli+txp-cpich_rscp-m,
Wherein, p represents the transmission power of random accessing message, and uli represents uplink interference, and txp represents main cpich transmitting work(
Rate, cpich_rscp represents cpich received signal code power, m represent power adjustment and be on the occasion of.
In conjunction with first aspect and its above-mentioned implementation, in another kind of implementation of first aspect, according to connecing at random
Enter the transmission power execution random access procedure of message, comprising: have sent a random accessing message in the random access procedure
Afterwards, base station is waited not retransmit random accessing message to the feedback of random accessing message.
In conjunction with first aspect and its above-mentioned implementation, in another kind of implementation of first aspect, according to connecing at random
The transmission rate entering message determines power adjustment, comprising: determine spreading gain according to the transmission rate of random accessing message；Root
Determine power adjustment according to spreading gain.
In conjunction with first aspect and its above-mentioned implementation, in another kind of implementation of first aspect, according to connecing at random
The transmission rate entering message determines spreading gain, comprising: determine spreading gain according to following formula:
G=10 × lg (cr/tr)
Wherein, g represents spreading gain, and cr represents the spreading rate of system, and tr represents the transmission rate of random accessing message,
Power adjustment is determined according to spreading gain, comprising: power adjustment is determined according to following formula:
M=g-ebno-delta
Wherein m represents power adjustment, and ebno represents the demodulation threshold of base station, and delta represents offset.
In conjunction with first aspect and its above-mentioned implementation, in another kind of implementation of first aspect, according to connecing at random
The transmission rate entering message determines power adjustment, comprising: according to the corresponding relation of default transmission rate and power adjustment,
Determine power adjustment corresponding with the transmission rate of random accessing message.
In conjunction with first aspect and its above-mentioned implementation, in another kind of implementation of first aspect, default transmission
The corresponding relation of speed and power adjustment be including multiple transmission rates interval with multiple power adjustment correspondingly
Form.According to the corresponding relation of default transmission rate and power adjustment, determine the transmission rate pair with random accessing message
The power adjustment answered, comprising: determine the power corresponding to transmission rate interval that the transmission rate of random accessing message falls into
Adjusted value.
In conjunction with first aspect and its above-mentioned implementation, in another kind of implementation of first aspect, default transmission
In the corresponding relation of speed and power adjustment, big transmit power corresponds to little power adjustment.
Second aspect, there is provided a kind of user equipment is it is characterised in that include: the first determining unit, for determining Your Majesty
Pilot channel cpich transmission power altogether, and determine uplink interference；Measuring unit, for measuring cpich received signal code power；
Second determining unit, determines power adjustment for the transmission rate according to random accessing message；3rd determining unit, for root
Determine random accessing message according to main cpich transmission power, uplink interference, cpich received signal code power and power adjustment
Transmission power；Stochastic accessing unit, executes random access procedure for the transmission power according to random accessing message.
In conjunction with second aspect, in a kind of implementation of second aspect, the 3rd determining unit is specifically for according to the following formula
Determine the transmission power of random accessing message, p=uli+txp-cpich_rscp-m,
Wherein, p represents the transmission power of random accessing message, and uli represents uplink interference, and txp represents main cpich transmitting work(
Rate, cpich_rscp represents cpich received signal code power, m represent power adjustment and be on the occasion of.
In conjunction with second aspect and its above-mentioned implementation, in another kind of implementation of second aspect, Stochastic accessing list
After unit is specifically for have sent a random accessing message during Stochastic accessing, wait base station to random accessing message
Feedback and do not retransmit random accessing message.
In conjunction with second aspect and its above-mentioned implementation, in another kind of implementation of second aspect, second determines list
Unit determines spreading gain specifically for the transmission rate according to random accessing message, and determines that power adjusts according to spreading gain
Value.
In conjunction with second aspect and its above-mentioned implementation, in another kind of implementation of second aspect, second determines list
Unit is specifically for determining spreading gain according to following formula:
G=10 × lg (cr/tr)
Wherein, g represents spreading gain, and cr represents the spreading rate of system, and tr represents the transmission rate of random accessing message,
And power adjustment is determined according to following formula:
M=g-ebno-delta
Wherein m represents power adjustment, and ebno represents the demodulation threshold of base station, and delta represents offset.
In conjunction with second aspect and its above-mentioned implementation, in another kind of implementation of second aspect, second determines list
Unit, specifically for the corresponding relation according to default transmission rate and power adjustment, determines the transmission speed with random accessing message
The corresponding power adjustment of rate.
In conjunction with second aspect and its above-mentioned implementation, in another kind of implementation of second aspect, default transmission
The corresponding relation of speed and power adjustment be including multiple transmission rates interval with multiple power adjustment correspondingly
Form.Corresponding to the transmission rate interval that second determining unit falls into specifically for the transmission rate determining random accessing message
Power adjustment.
In conjunction with second aspect and its above-mentioned implementation, in another kind of implementation of second aspect, default transmission
In the corresponding relation of speed and power adjustment, big transmit power corresponds to little power adjustment.
The embodiment of the present invention determines power adjustment according to the transmission rate of random accessing message, and is determining Stochastic accessing
Consider above-mentioned power adjustment during the transmission power of message, so can ensure that random accessing message can be received by base station as far as possible
Arrive, thus improve the efficiency of Stochastic accessing.
Brief description
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be in embodiment or description of the prior art
The accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description be only the present invention some are real
Apply example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the flow chart of the accidental access method of one embodiment of the invention.
Fig. 2 is the block diagram of the user equipment of one embodiment of the invention.
Fig. 3 is the block diagram of the user equipment of another embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment a part of embodiment that is the present invention, rather than whole embodiments.Based on this
Embodiment in bright, the every other enforcement that those of ordinary skill in the art are obtained under the premise of not making creative work
Example, broadly falls into the scope of protection of the invention.
Technical scheme, can apply to various communication systems, for example: global system for mobile communications (gsm,
Global system of mobile communication), CDMA (cdma, code division multiple
Access) system, WCDMA (wcdma, wideband code division multiple access
Wireless), GPRS (general packet radio service) (gprs, general packet radio service), Long Term Evolution (lte,
Long term evolution) etc..
User equipment (ue, user equipment), also referred to as mobile terminal (mobile terminal), movement
User equipment etc., can be through wireless access network (for example, ran, radio access network) and one or more core net
Communicated, user equipment can be mobile terminal, such as mobile phone (or referred to as " honeycomb " phone) and there is mobile terminal
Computer, for example, it may be portable, pocket, hand-held, built-in computer or vehicle-mounted mobile device, they with
Wireless access network exchanges language and/or data.
Base station, can be base station (bts, base transceiver station) in gsm or cdma or
Base station (nodeb) in wcdma, can also be evolved base station (enb or e-nodeb, the evolutional node in lte
B), the present invention does not limit, but for convenience of description, following embodiments illustrate taking node b as a example.
The Initial Trans of the random accessing message of regulation determine according to the following formula at present:
Preamble_initial_power=txp cpich_rscp+uli+cv,
Wherein, preamble_initial_power represents Initial Trans, and txp represents main cpich transmission power
(primary cpich tx power), cpich_rscp represents cpich received signal code power, and uli represents uplink interference (ul
Interference), cv is a constant (constant value).
In above-mentioned parameter, txp, uli and cv pass through broadcast by base station and notify to ue.For example, txp and cv passes through system information
Block (sib, system information block) type 6 or sib type 5 notify to ue, uli by sib type 7 notify to
ue.Cpich_rscp is measured by ue.
In above formula, uli is to make an uproar in the interference bottom of base station, and txp cpich_rscp is that eating dishes without rice or wine between base station and ue is decayed.Cv is
The constant that base station determines, ue can not change.
As can be seen here, ue can only determine the transmission power of random accessing message according to system information and rscp.Specifically, ue
Only consider the constant eating dishes without rice or wine to decay, make an uproar in interference bottom and base station gives, these parameters are substantially the out of contior value of ue, because
This this determine leading initial power mode underaction, determined by leading initial power be likely to be improper
's.In the case, even if leading initial power is improper, ue also can only step up transmission power, suitable until reaching
Till transmission power.Such power process of climbing may ratio relatively time-consuming, have impact on the time delay of access procedure.
Fig. 1 is the flow chart of the accidental access method of one embodiment of the invention.The method of Fig. 1 is executed by ue, specifically,
For example can be executed by the physical layer of ue.
101, determine main cpich transmission power txp, and determine uplink interference uli.
For example, ue can check whether the effective version storing txp.If it is, the content using stored txp；
Otherwise, read and cell (ie, information element) " the primary cpich tx that stores in sib type 6
Power ", in the case of not broadcasting sib type 6, reads and stores ie " the primary cpich tx in sib type 5
power”.
Again for example, the ie " ul interference " that ue can read and stores in sib type 7.If ue is due to no lines
Part poor and fail read sib type 7 in ie " ul interference ", then ue can use last stored ie " ul
interference”.
102, measure cpich received signal code power cpich_rscp.
103, power adjustment is determined according to the transmission rate of random accessing message.
104, determined according to main cpich transmission power, uplink interference, cpich received signal code power and power adjustment
The transmission power of random accessing message.
105, the transmission power according to random accessing message executes random access procedure.
Random access procedure can be similar to existing process.For example, can be leading according to the power bias relation calculating of regulation
(preamble) transmission power needing；Then in suitable access slot position, send leading (preamble), and in regulation
Position send random accessing message (message).
The embodiment of the present invention determines power adjustment according to the transmission rate of random accessing message, and is determining Stochastic accessing
Consider above-mentioned power adjustment during the transmission power of message, so can ensure that random accessing message can be received by base station as far as possible
Arrive, thus improve the efficiency of Stochastic accessing.
In other words, ue actively the transmission rate according to random accessing message can select suitable power adjustment, from
And obtain suitable transmission power, rather than it is only limited to the parameter that base station specifies.Such Random Access is more flexible.
Alternatively, as an embodiment, the transmitting work(of random accessing message can at step 104, be determined according to the following formula
Rate,
P=uli+txp-cpich_rscp-m,
Wherein, p represents the transmission power of random accessing message, and uli represents uplink interference, and txp represents main cpich transmitting work(
Rate, cpich_rscp represents cpich received signal code power, m represent power adjustment and be on the occasion of.
In this embodiment, ue does not use the constant cv that base station notifies, but using oneself according to random accessing message
Power adjustment m that transmission rate determines, so can obtain suitable transmission power as far as possible, improve the efficiency of Stochastic accessing.
Alternatively, as another embodiment, in step 105, have sent a Stochastic accessing in the random access procedure
After message, base station is waited not retransmit random accessing message to the feedback of random accessing message.
According to this embodiment, no matter whether base station is successfully received random accessing message, and ue is sending a Stochastic accessing
All do not carry out power after message to climb, do not repeat to send random accessing message yet.It is true that due to having obtained at step 104
Obtained more suitable transmission power, therefore the success rate of Stochastic accessing is higher in step 105.This climb without power
Mode decreases the time delay of random access procedure.
Now, if base station feedback is successfully received random accessing message, physical layer notifies Stochastic accessing to higher
Message has been successfully transmitted and has exited physical accidental access procedure.If base station feedback be unsuccessfully received random accessing message or
Ue does not receive the feedback of base station in the given time, then physical layer to higher notify random access failure and exit physics with
Machine access procedure.
Alternatively, as another embodiment, in step 103, ue can be when needing Stochastic accessing every time, and it is suitable to calculate
Power adjustment m.
Specifically, in step 103, ue can determine spreading gain g according to transmission rate tr of random accessing message, and root
Determine power adjustment m according to spreading gain g.
In this embodiment, ue considers spreading gain when determining random accessing message transmission power, can guarantee as far as possible
Random accessing message is received by base station.
For example, spreading gain can be determined according to following formula:
G=10 × lg (cr/tr)
Wherein, g represents spreading gain, and cr represents the spreading rate of system, and tr represents the transmission rate of random accessing message.
Lg is the logarithm operation symbol that the truth of a matter is 10.It should be noted that the embodiment of the present invention is not limited to the specific algorithm determining spreading gain.
Taking wcdma system as a example, spreading rate cr is 3.84m bps.Assume tr=38.4k bps, then spreading gain g=
20db.
In addition, when power adjustment is determined according to spreading gain g it is also contemplated that ebno and delta.Specifically, may be used
Power adjustment is determined according to following formula:
M=g-ebno-delta
Wherein m represents power adjustment, and ebno represents the demodulation threshold of base station, and delta represents offset.
Ebno is relevant with the coded system of system.Generally, the demodulation threshold of convolutional encoding mode is 5db.If
Ebno considers that certain demodulation threshold compensates, then can be 8db or 8.5db etc..
Delta can be default constant value, be for example used for compensating channel fading between different channels (or channel fading and
Demodulation threshold) difference and/or other differences.Delta value is bigger, and the probability that random accessing message is correctly received is bigger, but
Make an uproar lifting in the bottom that base station can be led to.Therefore, when arranging delta it is contemplated that the lifting of making an uproar of the bottom of base station is maintained less model
In enclosing, the Power Control of base station will be reached after ue transmitting within the specific limits.For example, it is assumed that requiring to reach the power ratio of base station
The low 10db of base station bottom noise, then allow lifting base station bottom noise 0.1db.The bottom of this magnitude make an uproar lifting will not excessively affect system hold
Amount.In the case, in case of g=20db, ebno=5db, then require delta≤g-ebno-10, therefore can be pre-
If delta=5db.In addition, in case of g=20db, ebno=8db, delta=2db or 3db can be preset.
In addition, when calculating g or m according to above-mentioned formula, result of calculation can be rounded up or down.Such round
Mode also falls in the range of the embodiment of the present invention.
Alternatively, as another embodiment, in step 103, ue can be according to default transmission rate and power adjustment
Corresponding relation, determine power adjustment corresponding with the transmission rate of random accessing message.This determination power adjustment
Mode efficiency is higher.
For example, the corresponding relation of above-mentioned default transmission rate and power adjustment can be including multiple transmission rate areas
Between form with multiple power adjustment correspondingly.Now, right according to default transmission rate and power adjustment
Should be related to, determine power adjustment corresponding with the transmission rate of random accessing message when it may be determined that random accessing message
The power adjustment corresponding to transmission rate interval that transmission rate falls into.
Table 1 gives an example of the interval correspondence table with algorithm for power modulation value of transmission rate.It should be noted that table 1
In numerical value be merely exemplary, rather than restriction to range of embodiment of the invention.It is assumed that chip is fast in the example of table 1
Rate cr=3.84m bps, ebno=8db, delta=3db.
Table 1
| Transmission rate interval (bps) | Power adjustment (db) |
| tr≥38.4k | 9 |
| 18k≤tr<38.4k | 12.3 |
| 8.4k≤tr<18k | 15.6 |
| tr<8.4k | 16 |
Alternatively, as another embodiment, in the corresponding relation of above-mentioned default transmission rate and power adjustment, big
Transmission rate corresponds to little power adjustment.In Stochastic accessing, select the random accessing message of little transmission rate, that is, as far as possible
Select big power adjustment, can be correctly received with the message guaranteeing to reach base station.
The embodiment of the present invention determines power adjustment according to the transmission rate of random accessing message, and is determining Stochastic accessing
Consider above-mentioned power adjustment during the transmission power of message, so can ensure that random accessing message can be received by base station as far as possible
Arrive, thus improve the efficiency of Stochastic accessing.
Also it should be noted that the execution sequence of each step to Fig. 1 for the embodiment of the present invention is not restricted.Such as step
101st, 102 and 103 can change execution sequence, or can simultaneously or partially simultaneously execute.These changes each fall within this
In the range of bright embodiment.
Fig. 2 is the block diagram of the user equipment of one embodiment of the invention.The user equipment 20 of Fig. 2 includes the first determining unit
21st, measuring unit 22, the second determining unit 23, the 3rd determining unit 24 and Stochastic accessing unit 25.
First determining unit 21 determines main cpich transmission power, and determines uplink interference.Measuring unit 22 measures cpich
Received signal code power.Second determining unit 23 determines power adjustment according to the transmission rate of random accessing message.
3rd determining unit 24 is according to main cpich transmission power, uplink interference, cpich received signal code power and power
Adjusted value determines the transmission power of random accessing message.
Stochastic accessing unit 25 executes random access procedure according to the transmission power of random accessing message.
The embodiment of the present invention determines power adjustment according to the transmission rate of random accessing message, and is determining Stochastic accessing
Consider above-mentioned power adjustment during the transmission power of message, so can ensure that random accessing message can be received by base station as far as possible
Arrive, thus improve the efficiency of Stochastic accessing.
The various pieces of user equipment 20 can perform each step of the method for Fig. 1, for avoiding repeating, no longer retouches in detail
State.
Random access procedure can be similar to existing process.For example, can be leading according to the power bias relation calculating of regulation
(preamble) transmission power needing；Then in suitable access slot position, send leading (preamble), and in regulation
Position send random accessing message (message).
Alternatively, as an embodiment, the 3rd determining unit 24 can determine the transmitting of random accessing message according to the following formula
Power,
P=uli+txp-cpich_rscp-m,
Wherein, p represents the transmission power of random accessing message, and uli represents uplink interference, and txp represents main cpich transmitting work(
Rate, cpich_rscp represents cpich received signal code power, m represent power adjustment and be on the occasion of.
Alternatively, as another embodiment, Stochastic accessing unit 25 can have sent once during Stochastic accessing
After random accessing message, base station is waited not retransmit random accessing message to the feedback of random accessing message.
According to this embodiment, no matter whether base station is successfully received random accessing message, and ue is sending a Stochastic accessing
All do not carry out power after message to climb, do not repeat to send random accessing message yet.This decrease without the mode that power climbs
The time delay of random access procedure.
Alternatively, as another embodiment, the second determining unit 23 can determine according to the transmission rate of random accessing message
Spreading gain, and power adjustment is determined according to spreading gain.
Alternatively, as another embodiment, the second determining unit 23 can determine spreading gain according to following formula:
G=10 × lg (cr/tr)
Wherein, g represents spreading gain, and cr represents the spreading rate of system, and tr represents the transmission rate of random accessing message.
And, the second determining unit 23 can determine power adjustment according to following formula:
M=g-ebno-delta
Wherein m represents power adjustment, and ebno represents the demodulation threshold of base station, and delta represents offset.
Alternatively, as another embodiment, the second determining unit 23 can be according to default transmission rate and power adjustment
Corresponding relation, determine power adjustment corresponding with the transmission rate of random accessing message.
Alternatively, as another embodiment, the corresponding relation of default transmission rate and power adjustment is including multiple
The interval form with multiple power adjustment correspondingly of transmission rate.In the case, the second determining unit 23 can determine that
The power adjustment corresponding to transmission rate interval that the transmission rate of random accessing message falls into.
Alternatively, as another embodiment, in the corresponding relation of default transmission rate and power adjustment, big transmission
Power corresponds to little power adjustment.
Fig. 3 is the block diagram of the user equipment of another embodiment of the present invention.The user equipment 30 of Fig. 3 includes processor 31, deposits
Reservoir 32, receiving circuit 33 and radiating circuit 34.Processor 31, memorizer 32, receiving circuit 33 and radiating circuit 34 pass through total
Linear system system 39 is connected.
Additionally, user equipment 30 can also include antenna 35 etc..Processor 31 controls the operation of user equipment 30.Memorizer
32 can include read only memory and random access memory, and to processor 31 provide instruction and data.The one of memorizer 32
Nonvolatile RAM (nvram) partly can also be included.Specific apply, radiating circuit 34 and receiving circuit
33 may be coupled to antenna 35.Each assembly of user equipment 30 is coupled by bus system 39, wherein bus system
39, in addition to including data/address bus, can also include power bus, controlling bus and status signal bus in addition etc..But in order to clear
For the sake of explanation, in figure, various buses are all designated as bus system 39.
Processor 31 is probably a kind of IC chip, has the disposal ability of signal.Above-mentioned processor 31 is permissible
Be general processor, digital signal processor (dsp), special IC (asic), ready-made programmable gate array (fpga) or
Other PLDs of person, discrete gate or transistor logic, discrete hardware components.Can realize or execute basis
Disclosed each method in inventive embodiments, step and logic diagram.General processor can be microprocessor or this process
Device can also be any conventional processor etc..Processor 31 reads the information in memorizer 32, in conjunction with its hardware controls user
The all parts of equipment 30.
The method of Fig. 1 can be realized in the user equipment 30 of Fig. 3, for avoiding repeating, is not described in detail.
Specifically, radiating circuit 34 is under the control of processor 31, completes following operation:
Determine main cpich transmission power txp, and determine uplink interference uli；
Measurement cpich received signal code power cpich_rscp；
Power adjustment is determined according to the transmission rate of random accessing message；
Determined random according to main cpich transmission power, uplink interference, cpich received signal code power and power adjustment
Access the transmission power of message；
Transmission power according to random accessing message executes random access procedure.
The embodiment of the present invention determines power adjustment according to the transmission rate of random accessing message, and is determining Stochastic accessing
Consider above-mentioned power adjustment during the transmission power of message, so can ensure that random accessing message can be received by base station as far as possible
Arrive, thus improve the efficiency of Stochastic accessing.
Alternatively, as an embodiment, radiating circuit 34 can determine the transmission power of random accessing message according to the following formula,
P=uli+txp-cpich_rscp-m,
Wherein, p represents the transmission power of random accessing message, and uli represents uplink interference, and txp represents main cpich transmitting work(
Rate, cpich_rscp represents cpich received signal code power, m represent power adjustment and be on the occasion of.
Alternatively, as another embodiment, radiating circuit 34 have sent a Stochastic accessing during Stochastic accessing
After message, receiving circuit 33 waits the feedback to random accessing message for the base station, and radiating circuit 34 does not retransmit Stochastic accessing
Message.
According to this embodiment, no matter whether base station is successfully received random accessing message, and ue is sending a Stochastic accessing
All do not carry out power after message to climb, do not repeat to send random accessing message yet.This decrease without the mode that power climbs
The time delay of random access procedure.
Alternatively, as another embodiment, radiating circuit 34 can determine spread spectrum according to the transmission rate of random accessing message
Gain, and power adjustment is determined according to spreading gain.
Alternatively, as another embodiment, radiating circuit 34 can determine spreading gain according to following formula:
G=10 × lg (cr/tr)
Wherein, g represents spreading gain, and cr represents the spreading rate of system, and tr represents the transmission rate of random accessing message.
And, radiating circuit 34 can determine power adjustment according to following formula:
M=g-ebno-delta
Wherein m represents power adjustment, and ebno represents the demodulation threshold of base station, and delta represents offset.
Alternatively, as another embodiment, radiating circuit 34 can be right according to default transmission rate and power adjustment
Should be related to, determine power adjustment corresponding with the transmission rate of random accessing message.
Alternatively, as another embodiment, the corresponding relation of default transmission rate and power adjustment is including multiple
The interval form with multiple power adjustment correspondingly of transmission rate.In the case, radiating circuit 34 can determine that at random
Access the power adjustment corresponding to transmission rate interval that the transmission rate of message falls into.
Alternatively, as another embodiment, in the corresponding relation of default transmission rate and power adjustment, big transmission
Power corresponds to little power adjustment.
Those of ordinary skill in the art are it is to be appreciated that combine the list of each example of the embodiments described herein description
Unit and algorithm steps, being capable of being implemented in combination in electronic hardware or computer software and electronic hardware.These functions are actually
To be executed with hardware or software mode, the application-specific depending on technical scheme and design constraint.Professional and technical personnel
Each specific application can be used different methods to realize described function, but this realization is it is not considered that exceed
The scope of the present invention.
Those skilled in the art can be understood that, for convenience and simplicity of description, the system of foregoing description,
Device and the specific work process of unit, may be referred to the corresponding process in preceding method embodiment, will not be described here.
It should be understood that disclosed system, apparatus and method in several embodiments provided herein, permissible
Realize by another way.For example, device embodiment described above is only schematically, for example, described unit
Divide, only a kind of division of logic function, actual can have other dividing mode when realizing, for example multiple units or assembly
Can in conjunction with or be desirably integrated into another system, or some features can be ignored, or does not execute.Another, shown or
The coupling each other discussing or direct-coupling or communication connection can be by some interfaces, the indirect coupling of device or unit
Close or communicate to connect, can be electrical, mechanical or other forms.
The described unit illustrating as separating component can be or may not be physically separate, show as unit
The part showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.The mesh to realize this embodiment scheme for some or all of unit therein can be selected according to the actual needs
's.
In addition, can be integrated in a processing unit in each functional unit in each embodiment of the present invention it is also possible to
It is that unit is individually physically present it is also possible to two or more units are integrated in a unit.
If described function realized using in the form of SFU software functional unit and as independent production marketing or use when, permissible
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially in other words
Partly being embodied in the form of software product of part that prior art is contributed or this technical scheme, this meter
Calculation machine software product is stored in a storage medium, including some instructions with so that a computer equipment (can be individual
People's computer, server, or network equipment etc.) execution each embodiment methods described of the present invention all or part of step.
And aforesaid storage medium includes: u disk, portable hard drive, read only memory (rom, read-only memory), random access memory are deposited
Reservoir (ram, random access memory), magnetic disc or CD etc. are various can be with the medium of store program codes.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should described be defined by scope of the claims.
Claims (16)
1. a kind of accidental access method is it is characterised in that include:
Determine Primary Common Pilot Channel cpich transmission power, and determine uplink interference；
Measurement cpich received signal code power；
Power adjustment is determined according to the transmission rate of random accessing message；
According to described main cpich transmission power, uplink interference, cpich received signal code power and power adjustment determine
The transmission power of random accessing message；
Transmission power according to described random accessing message executes random access procedure.
2. accidental access method as claimed in claim 1 it is characterised in that described according to described main cpich transmission power, on
Row interference, cpich received signal code power and power adjustment determine the transmission power of described random accessing message, comprising:
Determine the transmission power of described random accessing message according to the following formula,
P=uli+txp-cpich_rscp-m,
Wherein, p represents the transmission power of described random accessing message, and uli represents described uplink interference, and txp represents described master
Cpich transmission power, cpich_rscp represents described cpich received signal code power, and m represents described power adjustment and for just
Value.
3. accidental access method as claimed in claim 1 or 2 it is characterised in that described according to described random accessing message
Transmission power executes random access procedure, comprising:
After have sent once described random accessing message in described random access procedure, wait base station to described Stochastic accessing
The feedback of message and do not retransmit described random accessing message.
4. accidental access method as claimed in claim 1 or 2 is it is characterised in that the described transmission according to random accessing message
Speed determines power adjustment, comprising:
Spreading gain is determined according to the transmission rate of described random accessing message；
Described power adjustment is determined according to described spreading gain.
5. accidental access method as claimed in claim 4 is it is characterised in that the described transmission according to described random accessing message
Speed determines spreading gain, comprising:
Described spreading gain is determined according to following formula:
G=10 × lg (cr/tr)
Wherein, g represents described spreading gain, and cr represents the spreading rate of system, and tr represents the transmission of described random accessing message
Speed,
Described described power adjustment is determined according to described spreading gain, comprising:
Described power adjustment is determined according to following formula:
M=g-ebno-delta
Wherein m represents described power adjustment, and ebno represents the demodulation threshold of base station, and delta represents offset.
6. accidental access method as claimed in claim 1 or 2 is it is characterised in that the described transmission according to random accessing message
Speed determines power adjustment, comprising:
According to the corresponding relation of default transmission rate and power adjustment, determine the transmission rate with described random accessing message
Corresponding power adjustment.
7. accidental access method as claimed in claim 6 is it is characterised in that described default transmission rate and power adjustment
Corresponding relation be form with correspondingly multiple power adjustment interval including multiple transmission rates,
The described corresponding relation according to default transmission rate and power adjustment, determines the transmission with described random accessing message
The corresponding power adjustment of speed, comprising:
Determine the power adjustment corresponding to transmission rate interval that the transmission rate of described random accessing message falls into.
8. accidental access method as claimed in claim 6 is it is characterised in that described default transmission rate and power adjustment
Corresponding relation in, big transmit power corresponds to little power adjustment.
9. a kind of user equipment is it is characterised in that include:
First determining unit, for determining Primary Common Pilot Channel cpich transmission power, and determines uplink interference；
Measuring unit, for measuring cpich received signal code power；
Second determining unit, determines power adjustment for the transmission rate according to random accessing message；
3rd determining unit, for according to described main cpich transmission power, uplink interference, cpich received signal code power and work(
Rate adjusted value determines the transmission power of described random accessing message；
Stochastic accessing unit, executes random access procedure for the transmission power according to described random accessing message.
10. user equipment as claimed in claim 9 is it is characterised in that described 3rd determining unit is specifically for according to the following formula
Determine the transmission power of described random accessing message,
P=uli+txp-cpich_rscp-m,
Wherein, p represents the transmission power of described random accessing message, and uli represents described uplink interference, and txp represents described master
Cpich transmission power, cpich_rscp represents described cpich received signal code power, and m represents described power adjustment and for just
Value.
11. user equipmenies as described in claim 9 or 10 are it is characterised in that described Stochastic accessing unit is specifically in institute
After have sent once described random accessing message during stating Stochastic accessing, wait base station to described random accessing message
Feed back and do not retransmit described random accessing message.
12. user equipmenies as described in claim 9 or 10 are it is characterised in that described second determining unit is specifically for basis
The transmission rate of described random accessing message determines spreading gain, and determines described power adjustment according to described spreading gain.
13. user equipmenies as claimed in claim 12 are it is characterised in that described second determining unit is specifically for according to following formula
Determine described spreading gain:
G=10 × lg (cr/tr)
Wherein, g represents described spreading gain, and cr represents the spreading rate of system, and tr represents the transmission of described random accessing message
Speed,
And described power adjustment is determined according to following formula:
M=g-ebno-delta
Wherein m represents described power adjustment, and ebno represents the demodulation threshold of base station, and delta represents offset.
14. user equipmenies as described in claim 9 or 10 are it is characterised in that described second determining unit is specifically for basis
Default transmission rate and the corresponding relation of power adjustment, determine work(corresponding with the transmission rate of described random accessing message
Rate adjusted value.
15. user equipmenies as claimed in claim 14 are it is characterised in that described default transmission rate and power adjustment
Corresponding relation is form with correspondingly multiple power adjustment interval including multiple transmission rates,
The transmission rate that described second determining unit falls into specifically for the transmission rate determining described random accessing message is interval
Corresponding power adjustment.
16. user equipmenies as claimed in claim 14 are it is characterised in that described default transmission rate and power adjustment
In corresponding relation, big transmit power corresponds to little power adjustment.
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| WO2009075548A1 (en) * | 2007-12-12 | 2009-06-18 | Lg Electronics Inc. | A method for controlling uplink power control considering multiplexing rate/ratio |
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| CN101316125A (en) * | 2007-05-31 | 2008-12-03 | 华为技术有限公司 | Emission power regulation method and system |
| WO2009075548A1 (en) * | 2007-12-12 | 2009-06-18 | Lg Electronics Inc. | A method for controlling uplink power control considering multiplexing rate/ratio |
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Effective date of registration: 20210420 Address after: Unit 3401, unit a, building 6, Shenye Zhongcheng, No. 8089, Hongli West Road, Donghai community, Xiangmihu street, Futian District, Shenzhen, Guangdong 518040 Patentee after: Honor Device Co.,Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |