CN103458530A - Random access method and user equipment - Google Patents
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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 embodiment of the present invention relates to wireless communication field, and more specifically, relates to accidental access method and subscriber equipment.
Background technology
Third generation partner program (3GPP, 3rd Generation Partnership Project) has defined random access procedure, and the process of by initial power and leading (PREAMBLE), attempting climbing completes the transmission of random accessing message.
Particularly, subscriber equipment (UE, User Equipment) Primary Common Pilot Channel (the Primary CPICH that the system information provided according to base station and UE oneself measures, Primary Common Pilot Channel) received signal code power (RSCP, Received Signal Code Power), determine leading initial power (Preamble_Initial_Power), and launch random accessing message to access at random according to this initial power.For example, when this random access failure (making base station not receive random accessing message because transmitting power is too low), UE can attempt the transmitting power of random accessing message of climbing, and again launches random accessing message according to the transmitting power after climbing.UE repeats such emission-power process of climbing, until access successfully at random.
As can be seen here, UE can only determine the transmitting power of random accessing message according to system information and RSCP, and the leading initial power of determining like this may be inappropriate.In the case, even leading initial power is improper, UE also can only progressively improve transmitting power, until reach suitable transmitting power.Such power process of climbing may be more consuming time, affected the time delay of access procedure.
Summary of the invention
The embodiment of the present invention provides a kind of accidental access method and subscriber equipment, can improve the efficiency of random access.
First aspect, provide a kind of accidental access method, comprising: determine Primary Common Pilot Channel CPICH transmitting power, and definite uplink interference; Measure the CPICH received signal code power; Determine power adjustment according to the transmission rate of random accessing message; Determine the transmitting power of random accessing message according to main CPICH transmitting power, uplink interference, CPICH received signal code power and power adjustment; Transmitting power according to random accessing message is carried out random access procedure.
In conjunction with first aspect, in a kind of implementation of first aspect, determine the transmitting power of random accessing message according to main CPICH transmitting power, uplink interference, CPICH received signal code power and power adjustment, comprising: the transmitting power of determining according to the following formula random accessing message
P＝ULI＋TxP－CPICH_RCSP－M，
Wherein, P means the transmitting power of random accessing message, and ULI means uplink interference, and TxP means main CPICH transmitting power, and CPICH_RCSP means the CPICH received signal code power, M mean power adjustment and on the occasion of.
In conjunction with first aspect and above-mentioned implementation thereof, in the another kind of implementation of first aspect, transmitting power according to random accessing message is carried out random access procedure, comprise: sent random accessing message in random access procedure after, wait for that base station no longer sends random accessing message to the feedback of random accessing message.
In conjunction with first aspect and above-mentioned implementation thereof, in the another kind of implementation of first aspect, according to the transmission rate of random accessing message, determine power adjustment, comprising: according to the transmission rate of random accessing message, determine spreading gain; Determine power adjustment according to spreading gain.
In conjunction with first aspect and above-mentioned implementation thereof, in the another kind of implementation of first aspect, according to the transmission rate of random accessing message, determine spreading gain, comprising: according to following formula, determine spreading gain:
G＝10×lg（CR/TR）
Wherein, G means spreading gain, and CR means the spreading rate of system, and TR means the transmission rate of random accessing message,
Determine power adjustment according to spreading gain, comprising: according to following formula, determine power adjustment:
M＝G－EbNo－Delta
Wherein M means power adjustment, and EbNo means the demodulation threshold of base station, and Delta means offset.
In conjunction with first aspect and above-mentioned implementation thereof, in the another kind of implementation of first aspect, determine power adjustment according to the transmission rate of random accessing message, comprise: according to the corresponding relation of default transmission rate and power adjustment, determine the power adjustment corresponding with the transmission rate of random accessing message.
In conjunction with first aspect and above-mentioned implementation thereof, in the another kind of implementation of first aspect, default transmission rate and the corresponding relation of power adjustment be comprise a plurality of transmission rates interval with the form of a plurality of power adjustment one to one.According to the corresponding relation of default transmission rate and power adjustment, determine and to comprise the power adjustment corresponding with the transmission rate of random accessing message: determine the corresponding power adjustment in transmission rate interval that the transmission rate of random accessing message falls into.
In conjunction with first aspect and above-mentioned implementation thereof, in the another kind of implementation of first aspect, in default transmission rate and the corresponding relation of power adjustment, large transmitted power is corresponding to little power adjustment.
Second aspect, provide a kind of subscriber equipment, it is characterized in that, comprising: the first determining unit, and for determining Primary Common Pilot Channel CPICH transmitting power, and definite uplink interference; Measuring unit, for measuring the CPICH received signal code power; The second determining unit, determine power adjustment for the transmission rate according to random accessing message; The 3rd determining unit, for determining the transmitting power of random accessing message according to main CPICH transmitting power, uplink interference, CPICH received signal code power and power adjustment; Random access unit, carry out random access procedure for the transmitting 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 determining according to the following formula the transmitting power of random accessing message, P=ULI+TxP-CPICH_RCSP-M,
Wherein, P means the transmitting power of random accessing message, and ULI means uplink interference, and TxP means main CPICH transmitting power, and CPICH_RCSP means the CPICH received signal code power, M mean power adjustment and on the occasion of.
In conjunction with second aspect and above-mentioned implementation thereof, in the another kind of implementation of second aspect, random access unit, specifically for after having sent random accessing message in the process in random access, waits for that base station no longer sends random accessing message to the feedback of random accessing message.
In conjunction with second aspect and above-mentioned implementation thereof, in the another kind of implementation of second aspect, the second determining unit is determined spreading gain specifically for the transmission rate according to random accessing message, and determines power adjustment according to spreading gain.
In conjunction with second aspect and above-mentioned implementation thereof, in the another kind of implementation of second aspect, the second determining unit is specifically for determining spreading gain according to following formula:
G＝10×lg（CR/TR）
Wherein, G means spreading gain, and CR means the spreading rate of system, and TR means the transmission rate of random accessing message,
And determine power adjustment according to following formula:
M＝G－EbNo－Delta
Wherein M means power adjustment, and EbNo means the demodulation threshold of base station, and Delta means offset.
In conjunction with second aspect and above-mentioned implementation thereof, in the another kind of implementation of second aspect, the second determining unit, specifically for the corresponding relation of the transmission rate according to default and power adjustment, is determined the power adjustment corresponding with the transmission rate of random accessing message.
In conjunction with second aspect and above-mentioned implementation thereof, in the another kind of implementation of second aspect, default transmission rate and the corresponding relation of power adjustment be comprise a plurality of transmission rates interval with the form of a plurality of power adjustment one to one.The interval corresponding power adjustment of the transmission rate that the second determining unit falls into specifically for the transmission rate of determining random accessing message.
In conjunction with second aspect and above-mentioned implementation thereof, in the another kind of implementation of second aspect, in default transmission rate and the corresponding relation of power adjustment, large transmitted power is corresponding to little power adjustment.
The embodiment of the present invention is determined power adjustment according to the transmission rate of random accessing message, and consider above-mentioned power adjustment when determining the transmitting power of random accessing message, can guarantee that like this random accessing message can be received by base station as far as possible, thereby improve the efficiency of random access.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
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 subscriber equipment of one embodiment of the invention.
Fig. 3 is the block diagram of the subscriber equipment of another embodiment of the present invention.
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 clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
Technical scheme of the present invention, can be applied to various communication systems, for example: global system for mobile communications (GSM, Global System of Mobile communication), code division multiple access (CDMA, Code Division Multiple Access) system, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access Wireless), GPRS (GPRS, General Packet Radio Service), Long Term Evolution (LTE, Long Term Evolution) etc.
Subscriber equipment (UE, User Equipment), also can be referred to as mobile terminal (Mobile Terminal), mobile subscriber equipment etc., can be through wireless access network (for example, RAN, Radio Access Network) with one or more core net, communicate, subscriber equipment can be mobile terminal, as mobile phone (or being called " honeycomb " phone) with there is the computer of mobile terminal, for example, can be portable, pocket, hand-hold type, mobile device built-in computer or vehicle-mounted, they and wireless access network exchange language and/or data.
Base station, can be the base station (BTS in GSM or CDMA, Base Transceiver Station), it can be also the base station (NodeB) in WCDMA, can also be the evolved base station (eNB or e-NodeB, evolutional Node B) in LTE, the present invention limit, but for convenience of description, following embodiment be take Node B and is described as example.
The Initial Trans of the random accessing message of regulation is determined according to the following formula at present:
Preamble_Initial_Power=TxP–CPICH_RSCP+ULI+CV，
Wherein, Preamble_Initial_Power means Initial Trans, TxP means main CPICH transmitting power (Primary CPICH Tx power), CPICH_RSCP means the CPICH received signal code power, ULI means uplink interference (UL interference), and CV is a constant (Constant Value).
In above-mentioned parameter, TxP, ULI and CV by base station by broadcast announcement to UE.For example, TxP and CV notify to UE by system information block (SIB, System Information Block) type 6 or SIB type 5, and ULI notifies to UE by SIB type 7.CPICH_RSCP is measured by UE.
In above formula, ULI makes an uproar at the bottom of the interference of base station, and TxP – CPICH_RSCP is the eating dishes without rice or wine decay between base station and UE.CV is the definite constant in base station, and UE can not change.
As can be seen here, UE can only determine according to system information and RSCP the transmitting power of random accessing message.Particularly, UE only considers to eat dishes without rice or wine to decay, disturb the constant that make an uproar in the end and base station is given, these parameters are substantially all the out of contior values of UE, so this mode underaction of determining leading initial power, and determined leading initial power is probably also inappropriate.In the case, even leading initial power is improper, UE also can only progressively improve transmitting power, until reach suitable transmitting power.Such power process of climbing may be more consuming time, affected 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 carried out by UE, particularly, for example can be carried out by the physical layer of UE.
101, determine main CPICH transmitting power TxP, and definite uplink interference ULI.
For example, UE can check effective version of whether having stored TxP.If so, use the content of the TxP stored; Otherwise, read and store the cell (IE in SIB type 6, Information Element) " Primary CPICH Tx power ", in the situation that do not broadcast SIB type 6, read and store the IE " Primary CPICH Tx power " in SIB type 5.
Again for example, UE can read and store the IE " UL interference " in SIB type 7.If UE fails to read the IE " UL interference " in SIB type 7 because radio condition is poor, UE can be used the IE " UL interference " of last stored.
102, measure CPICH received signal code power CPICH_RSCP.
103, determine power adjustment according to the transmission rate of random accessing message.
104, determine the transmitting power of random accessing message according to main CPICH transmitting power, uplink interference, CPICH received signal code power and power adjustment.
105, carry out random access procedure according to the transmitting power of random accessing message.
Random access procedure can be similar to existing process.For example, can power bias relation according to the rules calculate the transmitting power that leading (PREAMBLE) needs; Then in suitable access slot position, send leading (PREAMBLE), and send random accessing message (MESSAGE) in the position of regulation.
The embodiment of the present invention is determined power adjustment according to the transmission rate of random accessing message, and consider above-mentioned power adjustment when determining the transmitting power of random accessing message, can guarantee that like this random accessing message can be received by base station as far as possible, thereby improve the efficiency of random access.
In other words, UE can initiatively select suitable power adjustment according to the transmission rate of random accessing message, thereby obtains suitable transmitting power, rather than only only limits to the parameter of base station regulation.Such Random Access is more flexible.
Alternatively, as an embodiment, in step 104, can determine according to the following formula the transmitting power of random accessing message,
P＝ULI＋TxP－CPICH_RCSP－M，
Wherein, P means the transmitting power of random accessing message, and ULI means uplink interference, and TxP means main CPICH transmitting power, and CPICH_RCSP means the CPICH received signal code power, M mean power adjustment and on the occasion of.
In this embodiment, UE is not used the constant C V of base station notice, but uses the own power adjustment M definite according to the transmission rate of random accessing message, can access the suitable transmitting power of trying one's best like this, improves the efficiency of random access.
Alternatively, as another embodiment, in step 105, sent random accessing message in random access procedure after, wait for that base station no longer sends random accessing message to the feedback of random accessing message.
According to this embodiment, no matter whether base station successfully receives random accessing message, and UE does not all carry out power and climbs after random accessing message of transmission, does not repeat to send random accessing message yet.In fact, owing to having obtained comparatively suitable transmitting power in step 104, therefore in step 105, the success rate of random access is higher.This mode of climbing without power has reduced the time delay of random access procedure.
Now, if base station feedback successfully receives random accessing message, physical layer successfully sends and exits the physical accidental access procedure to more high-rise notice random accessing message.If base station feedback does not successfully receive the feedback that random accessing message or UE do not receive base station in the given time, physical layer is to more high-rise notice random access failure and exit the physical accidental access procedure.
Alternatively, as another embodiment, in step 103, UE can, when needing random access, calculate suitable power adjustment M at every turn.
Particularly, in step 103, UE can determine according to the transmission rate TR of random accessing message spreading gain G, and determines power adjustment M according to spreading gain G.
In this embodiment, UE considers spreading gain when definite random accessing message transmitting power, can guarantee that random accessing message is received by base station as far as possible.
For example, can determine spreading gain according to following formula:
G＝10×lg（CR/TR）
Wherein, G means spreading gain, and CR means the spreading rate of system, and TR means 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 does not limit the specific algorithm of determining spreading gain.
Take the WCDMA system as example, and spreading rate CR is 3.84M bps.Suppose TR=38.4k bps, spreading gain G=20db.
In addition, when according to spreading gain G, determining power adjustment, it is also conceivable that EbNo and Delta.Particularly, can determine power adjustment according to following formula:
M＝G－EbNo－Delta
Wherein M means power adjustment, and EbNo means the demodulation threshold of base station, and Delta means offset.
EbNo is relevant with the coded system of system.Usually, the demodulation threshold of convolutional encoding mode is the 5db left and right.If EbNo considers certain demodulation threshold compensation, can be 8db or 8.5db etc.
Delta can be default constant value, for example, for compensating difference and/or other difference of channel fading between different channels (or channel fading and demodulation threshold).The Delta value is larger, and the probability that random accessing message is correctly received is larger, but can cause the lifting of making an uproar of the end of base station.Therefore, when Delta is set, can consider the lifting of making an uproar of the end of base station is maintained in less scope, the power that is about to after the UE emission to arrive base station is controlled within the specific limits.For example, suppose require to arrive at the bottom of the power ratio base station of base station the low 10db that makes an uproar, allow at the bottom of the lifting base station to make an uproar 0.1db.The lifting of making an uproar of the end of this magnitude can too not affect power system capacity.In the case, the situation of G=20db, EbNo=5db of take is example, requires Delta≤G-EbNo-10, therefore can preset Delta=5db.In addition, the situation of G=20db, EbNo=8db of take is example, can preset Delta=2db or 3db.
In addition, when according to above-mentioned formula, calculating G or M, can round up or down result of calculation.The mode that rounds so also falls in the scope of the embodiment of the present invention.
Alternatively, as another embodiment, in step 103, UE can, according to the corresponding relation of default transmission rate and power adjustment, determine the power adjustment corresponding with the transmission rate of random accessing message.The mode efficiency of this definite power adjustment is higher.
For example, the corresponding relation of above-mentioned default transmission rate and power adjustment can be comprise a plurality of transmission rates interval with the form of a plurality of power adjustment one to one.Now, corresponding relation in the transmission rate according to default and power adjustment, while determining the power adjustment corresponding with the transmission rate of random accessing message, can determine the corresponding power adjustment in transmission rate interval that the transmission rate of random accessing message falls into.
Table 1 has provided an example of the correspondence table of transmission rate interval and power modulation value.It should be noted that the numerical value in table 1 is only exemplary, but not to the restriction of embodiment of the present invention scope.In the example of table 1, suppose spreading 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, large transmission rate is corresponding to little power adjustment.When random access, select the random accessing message of little transmission rate as far as possible, select large power adjustment, to guarantee the message that arrives base station, can be correctly received.
The embodiment of the present invention is determined power adjustment according to the transmission rate of random accessing message, and consider above-mentioned power adjustment when determining the transmitting power of random accessing message, can guarantee that like this random accessing message can be received by base station as far as possible, thereby improve the efficiency of random access.
Also it should be noted that the embodiment of the present invention is not restricted the execution sequence of each step of Fig. 1.For example step 101,102 and 103 can change execution sequence, or can side by side carry out simultaneously or partly.These variations all fall in the scope of the embodiment of the present invention.
Fig. 2 is the block diagram of the subscriber equipment of one embodiment of the invention.The subscriber equipment 20 of Fig. 2 comprises the first determining unit 21, measuring unit 22, the second determining unit 23, the 3rd determining unit 24 and random access unit 25.
The first determining unit 21 is determined main CPICH transmitting power, and definite uplink interference.Measuring unit 22 is measured the CPICH received signal code power.The second determining unit 23 is determined power adjustment according to the transmission rate of random accessing message.
The 3rd determining unit 24 is determined the transmitting power of random accessing message according to main CPICH transmitting power, uplink interference, CPICH received signal code power and power adjustment.
Random access unit 25 is carried out random access procedure according to the transmitting power of random accessing message.
The embodiment of the present invention is determined power adjustment according to the transmission rate of random accessing message, and consider above-mentioned power adjustment when determining the transmitting power of random accessing message, can guarantee that like this random accessing message can be received by base station as far as possible, thereby improve the efficiency of random access.
But each step of the method for the various piece execution graph 1 of subscriber equipment 20, for avoiding repetition, be not described in detail.
Random access procedure can be similar to existing process.For example, can power bias relation according to the rules calculate the transmitting power that leading (PREAMBLE) needs; Then in suitable access slot position, send leading (PREAMBLE), and send random accessing message (MESSAGE) in the position of regulation.
Alternatively, as an embodiment, the 3rd determining unit 24 can be determined the transmitting power of random accessing message according to the following formula,
P＝ULI＋TxP－CPICH_RCSP－M，
Wherein, P means the transmitting power of random accessing message, and ULI means uplink interference, and TxP means main CPICH transmitting power, and CPICH_RCSP means the CPICH received signal code power, M mean power adjustment and on the occasion of.
Alternatively, as another embodiment, random access unit 25 waits for that base station no longer sends random accessing message to the feedback of random accessing message after can in the process of random access, having sent random accessing message.
According to this embodiment, no matter whether base station successfully receives random accessing message, and UE does not all carry out power and climbs after random accessing message of transmission, does not repeat to send random accessing message yet.This mode of climbing without power has reduced the time delay of random access procedure.
Alternatively, as another embodiment, the second determining unit 23 can be determined spreading gain according to the transmission rate of random accessing message, and determines power adjustment according to spreading gain.
Alternatively, as another embodiment, the second determining unit 23 can be determined spreading gain according to following formula:
G＝10×lg（CR/TR）
Wherein, G means spreading gain, and CR means the spreading rate of system, and TR means the transmission rate of random accessing message.
And the second determining unit 23 can be determined power adjustment according to following formula:
M＝G－EbNo－Delta
Wherein M means power adjustment, and EbNo means the demodulation threshold of base station, and Delta means offset.
Alternatively, as another embodiment, the second determining unit 23 can, according to the corresponding relation of default transmission rate and power adjustment, be determined the power adjustment corresponding with the transmission rate of random accessing message.
Alternatively, as another embodiment, default transmission rate and the corresponding relation of power adjustment be comprise a plurality of transmission rates interval with the form of a plurality of power adjustment one to one.In the case, the second determining unit 23 can be determined the interval corresponding power adjustment of transmission rate that the transmission rate of random accessing message falls into.
Alternatively, as another embodiment, in default transmission rate and the corresponding relation of power adjustment, large transmitted power is corresponding to little power adjustment.
Fig. 3 is the block diagram of the subscriber equipment of another embodiment of the present invention.The subscriber equipment 30 of Fig. 3 comprises processor 31, memory 32, receiving circuit 33 and radiating circuit 34.Processor 31, memory 32, receiving circuit 33 and radiating circuit 34 are connected by bus system 39.
In addition, subscriber equipment 30 can also comprise antenna 35 etc.Processor 31 is controlled the operation of subscriber equipment 30.Memory 32 can comprise read-only memory and random access memory, and provides instruction and data to processor 31.The part of memory 32 can also comprise nonvolatile RAM (NVRAM).In concrete application, radiating circuit 34 and receiving circuit 33 can be coupled to antenna 35.Each assembly of subscriber equipment 30 is coupled by bus system 39, and wherein bus system 39, except comprising data/address bus, can also comprise power bus, control bus and status signal bus in addition etc.But, for the purpose of clearly demonstrating, in the drawings various buses all are designated as to bus system 39.
Processor 51 may be a kind of integrated circuit (IC) chip, has the disposal ability of signal.Above-mentioned processor 51 can be general processor, digital signal processor (DSP), application-specific integrated circuit (ASIC) (ASIC), ready-made programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic device, discrete hardware components.Can realize or carry out disclosed each method, step and logic diagram in the embodiment of the present invention.General processor can be that microprocessor or this processor can be also the processors of any routine etc.Information in processor 31 read memories 32, in conjunction with all parts of its hardware controls subscriber equipment 30.
The method of Fig. 1 can realize, for avoiding repetition, be not described in detail in the subscriber equipment 30 of Fig. 3.
Particularly, radiating circuit 34, under the control of processor 31, completes following operation:
Determine main CPICH transmitting power TxP, and definite uplink interference ULI;
Measure CPICH received signal code power CPICH_RSCP;
Determine power adjustment according to the transmission rate of random accessing message;
Determine the transmitting power of random accessing message according to main CPICH transmitting power, uplink interference, CPICH received signal code power and power adjustment;
Transmitting power according to random accessing message is carried out random access procedure.
The embodiment of the present invention is determined power adjustment according to the transmission rate of random accessing message, and consider above-mentioned power adjustment when determining the transmitting power of random accessing message, can guarantee that like this random accessing message can be received by base station as far as possible, thereby improve the efficiency of random access.
Alternatively, as an embodiment, radiating circuit 34 can be determined the transmitting power of random accessing message according to the following formula,
P＝ULI＋TxP－CPICH_RCSP－M，
Wherein, P means the transmitting power of random accessing message, and ULI means uplink interference, and TxP means main CPICH transmitting power, and CPICH_RCSP means the CPICH received signal code power, M mean power adjustment and on the occasion of.
Alternatively, as another embodiment, after radiating circuit 34 has sent random accessing message in the process of random access, receiving circuit 33 is waited for the feedback of base stations to random accessing message, and radiating circuit 34 no longer sends random accessing message.
According to this embodiment, no matter whether base station successfully receives random accessing message, and UE does not all carry out power and climbs after random accessing message of transmission, does not repeat to send random accessing message yet.This mode of climbing without power has reduced the time delay of random access procedure.
Alternatively, as another embodiment, radiating circuit 34 can be determined spreading gain according to the transmission rate of random accessing message, and determines power adjustment according to spreading gain.
Alternatively, as another embodiment, radiating circuit 34 can be determined spreading gain according to following formula:
G＝10×lg（CR/TR）
Wherein, G means spreading gain, and CR means the spreading rate of system, and TR means the transmission rate of random accessing message.
And radiating circuit 34 can be determined power adjustment according to following formula:
M＝G－EbNo－Delta
Wherein M means power adjustment, and EbNo means the demodulation threshold of base station, and Delta means offset.
Alternatively, as another embodiment, radiating circuit 34 can, according to the corresponding relation of default transmission rate and power adjustment, be determined the power adjustment corresponding with the transmission rate of random accessing message.
Alternatively, as another embodiment, default transmission rate and the corresponding relation of power adjustment be comprise a plurality of transmission rates interval with the form of a plurality of power adjustment one to one.In the case, radiating circuit 34 can be determined the interval corresponding power adjustment of transmission rate that the transmission rate of random accessing message falls into.
Alternatively, as another embodiment, in default transmission rate and the corresponding relation of power adjustment, large transmitted power is corresponding to little power adjustment.
Those of ordinary skills can recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.The professional and technical personnel can specifically should be used for realizing described function with distinct methods to each, but this realization should not thought and exceeds scope of the present invention.
The those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the system of foregoing description, device and unit, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
In the several embodiment that provide in the application, should be understood that disclosed system, apparatus and method can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, during actual the realization, other dividing mode can be arranged, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
The described unit as the separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed on a plurality of network element.Can select according to the actual needs some or all of unit wherein to realize the purpose of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.
If described function usings that the form of SFU software functional unit realizes and during as production marketing independently or use, can be stored in a computer read/write memory medium.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words or the part of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, or the network equipment etc.) carry out all or part of step of the described method of each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CDs.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by the described protection range with claim.
Claims (16)
1. an accidental access method, is characterized in that, comprising:
Determine Primary Common Pilot Channel CPICH transmitting power, and definite uplink interference;
Measure the CPICH received signal code power;
Determine power adjustment according to the transmission rate of random accessing message;
Determine the transmitting power of described random accessing message according to described main CPICH transmitting power, uplink interference, CPICH received signal code power and power adjustment;
Transmitting power according to described random accessing message is carried out random access procedure.
2. accidental access method as claimed in claim 1, is characterized in that, the described transmitting power of determining described random accessing message according to described main CPICH transmitting power, uplink interference, CPICH received signal code power and power adjustment comprises:
Determine according to the following formula the transmitting power of described random accessing message,
P＝ULI＋TxP－CPICH_RCSP－M，
Wherein, P means the transmitting power of described random accessing message, and ULI means described uplink interference, and TxP means described main CPICH transmitting power, and CPICH_RCSP means described CPICH received signal code power, M mean described power adjustment and on the occasion of.
3. accidental access method as claimed in claim 1 or 2, is characterized in that, the described transmitting power according to described random accessing message is carried out random access procedure, comprising:
Sent once described random accessing message in described random access procedure after, wait for that base station no longer sends described random accessing message to the feedback of described random accessing message.
4. as the described accidental access method of claim 1-3 any one, it is characterized in that, the described transmission rate according to random accessing message is determined power adjustment, comprising:
Determine spreading gain according to the transmission rate of described random accessing message;
Determine described power adjustment according to described spreading gain.
5. accidental access method as claimed in claim 4, is characterized in that, the described transmission rate according to described random accessing message is determined spreading gain, comprising:
Determine described spreading gain according to following formula:
G＝10×lg（CR/TR）
Wherein, G means described spreading gain, and CR means the spreading rate of system, and TR means the transmission rate of described random accessing message,
Describedly according to described spreading gain, determine described power adjustment, comprising:
Determine described power adjustment according to following formula:
M＝G－EbNo－Delta
Wherein M means described power adjustment, and EbNo means the demodulation threshold of base station, and Delta means offset.
6. as the described accidental access method of claim 1-3 any one, it is characterized in that, the described transmission rate according to random accessing message is determined power adjustment, comprising:
According to the corresponding relation of default transmission rate and power adjustment, determine the power adjustment corresponding with the transmission rate of described random accessing message.
7. accidental access method as claimed in claim 6, is characterized in that, the corresponding relation of described default transmission rate and power adjustment be comprise a plurality of transmission rates interval with the form of a plurality of power adjustment one to one,
The transmission rate that described basis is default and the corresponding relation of power adjustment, determine the power adjustment corresponding with the transmission rate of described random accessing message, comprising:
Determine the interval corresponding power adjustment of transmission rate that the transmission rate of described random accessing message falls into.
8. accidental access method as claimed in claim 6, is characterized in that, in the corresponding relation of described default transmission rate and power adjustment, large transmitted power is corresponding to little power adjustment.
9. a subscriber equipment, is characterized in that, comprising:
The first determining unit, for determining Primary Common Pilot Channel CPICH transmitting power, and definite uplink interference;
Measuring unit, for measuring the CPICH received signal code power;
The second determining unit, determine power adjustment for the transmission rate according to random accessing message;
The 3rd determining unit, for determining the transmitting power of described random accessing message according to described main CPICH transmitting power, uplink interference, CPICH received signal code power and power adjustment;
Random access unit, carry out random access procedure for the transmitting power according to described random accessing message.
10. subscriber equipment as claimed in claim 9, is characterized in that, described the 3rd determining unit is specifically for determining according to the following formula the transmitting power of described random accessing message,
P＝ULI＋TxP－CPICH_RCSP－M，
Wherein, P means the transmitting power of described random accessing message, and ULI means described uplink interference, and TxP means described main CPICH transmitting power, and CPICH_RCSP means described CPICH received signal code power, M mean described power adjustment and on the occasion of.
11. subscriber equipment as described as claim 9 or 10, it is characterized in that, described random access unit, specifically for sent once described random accessing message in the process of described random access after, waits for that base station no longer sends described random accessing message to the feedback of described random accessing message.
12. as the described subscriber equipment of claim 9-11 any one, it is characterized in that, described the second determining unit is determined spreading gain specifically for the transmission rate according to described random accessing message, and determines described power adjustment according to described spreading gain.
13. subscriber equipment as claimed in claim 12, is characterized in that, described the second determining unit is specifically for determining described spreading gain according to following formula:
G＝10×lg（CR/TR）
Wherein, G means described spreading gain, and CR means the spreading rate of system, and TR means the transmission rate of described random accessing message,
And determine described power adjustment according to following formula:
M＝G－EbNo－Delta
Wherein M means described power adjustment, and EbNo means the demodulation threshold of base station, and Delta means offset.
14. as the described subscriber equipment of claim 9-11 any one, it is characterized in that, described the second determining unit, specifically for the corresponding relation of the transmission rate according to default and power adjustment, is determined the power adjustment corresponding with the transmission rate of described random accessing message.
15. subscriber equipment as claimed in claim 14, is characterized in that, the corresponding relation of described default transmission rate and power adjustment be comprise a plurality of transmission rates interval with the form of a plurality of power adjustment one to one,
The interval corresponding power adjustment of the transmission rate that described the second determining unit falls into specifically for the transmission rate of determining described random accessing message.
16. subscriber equipment as claimed in claim 14, is characterized in that, in the corresponding relation of described default transmission rate and power adjustment, large transmitted power is corresponding to little power adjustment.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| QUALCOMM EUROPE: "On the accuracy of the first UPH measurement based on PRACH preamble", 《3GPP TSG-RAN WG4 MEETING #48；R4-081888》, 22 August 2008 (2008-08-22) * |
| QUALCOMM INCORPORATED: "On the accuracy of 2ms/10ms TTI selection for FE-FACH", 《3GPP TSG-WG4 MEETING #64BIS；R4-125802》, 12 October 2012 (2012-10-12) * |
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