CN102724746A

CN102724746A - Control method, determination method and system for preamble code transmitting power in random access process

Info

Publication number: CN102724746A
Application number: CN2011100768258A
Authority: CN
Inventors: 毛磊; 喻斌; 许英奇; 戴谦
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2011-03-29
Filing date: 2011-03-29
Publication date: 2012-10-10
Also published as: WO2012129905A1

Abstract

A control method, a determination method and a system for preamble code transmitting in a random access process. The control method comprises selecting, by a network-side device, terminal objects that are controlled and control information that corresponds to the terminal objects, wherein the control information is used for instructing the terminal objects to perform the configuration of preamble code transmitting power and/or preamble code maximum transmitting frequencies, and the network side device transmits the control information to each terminal corresponding to the terminal objects. The determination method used for the terminals comprises: receiving the control information that is transmitted by the network side device to the terminals and is configured to the selected terminal objects, wherein the control information is used for instructing the corresponding terminal objects to perform the configuration of preamble code transmitting power and/or preamble code maximum transmitting times, and proceeding the configuration of preamble code transmitting power and/or preamble code maximum transmitting times according to the control information. The control method, the determination method and the system help to avoid the problem of poor preamble code detection performance caused by the same preamble code power used by a lot of terminals in the random access process.

Description

The control of lead code transmitted power in the random access procedure, confirm method and system

Technical field

The present invention relates to the communications field, relate in particular to lead code transmitted power in a kind of random access procedure control method, confirm method and system.

Background technology

Person to person communication (Human to Human abbreviates H2H as) is meant the people through operation of equipment is communicated, and the existing wireless communications technology is based on that the Communication Development of H2H gets up.And machine and machine communication (Machine to Machine abbreviates M2M as) are meant that broadly with the machine terminal intelligent interaction be application and service core, networking.It is based on the intelligence machine terminal, is the access means, is the informatization resolve scheme that the client provides with multiple communication mode, is used to satisfy the information system requirement of client to aspects such as monitoring, command scheduling, data acquisition and measurements.

The development of wireless technology is the key factor of M2M market development; It has broken through the space-time restriction and the region obstacle of traditional communication mode; Make the enterprise and the public break away from the cable constraint, let the client more effectively control cost, reduce mounting cost and easy to use.In addition, growing demand is promoting M2M and is constantly advancing.Constantly increase with information processing capability and the network bandwidth and conflictingly to be; The means that information is obtained lag far behind; And M2M has well satisfied this demand of people, through this technology people external environment condition monitoring in real time, realizes on a large scale, the information gathering of automation.Therefore, M2M can be applied to fields such as sector application, domestic. applications, individual's application.Use in the industry application comprises: traffic monitoring, warning system, rescue at sea, automatic vending machine, driving paying etc.Use in domestic application domain comprises: automatic data logging, temperature control etc.Use in individual application comprises: life detection, far-end diagnosis etc.

The communication object of M2M is machine or Human-to-Machine.Data communication between one or more machines is defined as Machine Type communication (Machine Type Communication abbreviates MTC as), lessly in this case needs human-computer interaction.Participate in the machine of MTC, be defined as MTC equipment (MTC Device abbreviates MD as).MTC equipment is MTC user's terminal, can pass through public land mobile network (Public Land Mobile Network abbreviates PLMN as) network and other MTC equipment, MTC server and communicate.

After introducing M2M and using, can carry out some to existing system according to its characteristics and optimize, satisfying the application demand of M2M, and the common UE in the existing system not exerted an influence.Some distinguishing features that M2M uses comprise:

(1) the MTC number of devices is a lot; Estimation according to Vodafone; The MTC equipment of in the cell range in urban district, London, installing will reach 3000; If the initiation that so many MTC equipment is relatively concentrated inserts request at random,, will bring very big impact to system as under situation such as fire, earthquake, reporting to the police simultaneously;

(2) transfer of data is regular, and each data quantity transmitted is little, and transmission intercal is big;

(3) mobility of MTC equipment is relatively poor, and a large amount of MTC equipment characteristics that the position can not change after setting up are called as terminal location and fix (no mobility); Or the terminal moves the characteristic that also only in limited cell range, moves and is called as Hypomobility (low mobility), specifically regards as the cell range size of Hypomobility and stipulated by operator.

In Long Term Evolution (Long Term Evolution the abbreviates LTE as) system, as shown in Figure 1 based on the access process at random of competition, mainly be divided into four steps:

Step 102: subscriber equipment (User Equipment abbreviates UE as) is selected one leading (Premable) sign indicating number at random, goes up at Physical Random Access Channel (Physical Random Channel abbreviates PRACH as) and sends;

Step 104: Node B (eNodeB) is after having detected the transmission of Premable sign indicating number; Descending transmission accidental access response; Comprise following information in the accidental access response: the numbering of the Premable sign indicating number of being received, the Premable sign indicating number time corresponding adjustment amount of being received, be that the ascending resource position indication information of this terminal distribution and interim Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Temporary Cell Radio Network Temporary Identifier abbreviates Temporary C-RNTI as) distribute;

Step 106:UE according to its indication, sends upstream message on the ascending resource that distributes after receiving accidental access response.At least should comprise in this upstream message: unique identification TMSI at this terminal (Temporary Mobile Subscriber Identity, the interim identification code of client) or random identification (Random ID);

Step 108:eNodeB receives the upstream message of UE, and returns competition solution message to inserting successful UE.This competition solves in the message and should comprise at least: the unique ID (being TMSI) or the Random ID that insert successful terminal.

The process of the random access guiding (Premable) that wherein, sends to UE comprises the steps:

Step 1: judge whether leading transmission number of times surpasses the maximum number of times of transmission of setting, if insert problem at random to one of upper strata indication; As not to carry out next step;

Step 2: the target power value of leading reception is set, that is:

PREMABLE_RECEIVED_TARGET_POWER＝PREMABLE_INITIAL_RECEIVED_TARGET_POWER?+?DELTA_PREMABLE?+ （PREMABLE_TRANSMISSION_COUNTER-1）*POWER_RAMP_STEP

Wherein, PREMABLE_RECEIVED_TARGET_POWER representes the target power of leading reception; PREMABLE_INITIAL_RECEIVED_TARGET_POWER is the Premable sign indicating number received power that system passes through the base station expectation of broadcast transmission; DELTA_PREMABLE is a power offset values relevant with the Premable sign indicating number form of choosing; PREMABLE_TRANSMISSION_COUNTER representes that UE sends the number of times of Premable sign indicating number, if UE does not receive response after sending Premable, and at most can retry 200 times; The step-length that power increased when POWER_RAMP_STEP represented that UE repeats to send the Premable sign indicating number, can be configured to 0dB, 2dB, 4dB, 6dB}, along with the increase that UE sends Premable sign indicating number number of times, transmitting power promotes with step-length POWER_RAMP_STEP.

Step 3: the opportunity of access at random that decision is next available;

Step 4: the target power that RA-RNTI, Premable index and the Premable that the indication physical layer uses selected PRACH resource to send a Premable, correspondence receives.

In existing system, UE will increase power when launching accidental access signal once more after carrying out access attempts (RACH attempt) failure at random.Power configuration is following in random access procedure:

PREMABLE_RECEIVED_TARGET_POWER＝PREMABLE_INITIAL_RECEIVED_TARGET_POWER+?DELTA_PREMABLE?+ （PREMABLE_TRANSMISSION_COUNTER-1）*POWER_RAMP_STEP

In addition, can be in the existing system message to a lead code emission maximum of all terminal configuration number of times, the terminal can only be attempted the emission maximum number of times of being joined at most inserting under the unsuccessful situation.

It is that monitoring is type professional that a lot of MTC use, and therefore after introducing a large amount of MD, maybe a lot of MD can a large amount of MD so just might occur and insert at random simultaneously in reported data at the same time, and collision probability is very high.A lot of MD increase power when (RACH reattempt) in random access procedure subsequently, will inevitably cause the interference level on the RACH to promote, and cause the detection performance of lead code to reduce.If a large amount of MD are connecting system simultaneously, occur under a large amount of case of collision, still allow MD to carry out retry many times, can make the collision of whole system continue the long period.

In addition, the access exploration of a large amount of MD can influence the random access procedure of ordinary terminal, and often the priority of MD is all lower, and is so urgent in the time of can not making a phone call as the people, therefore how to avoid and when reducing MD and inserting in a large number the influence to ordinary terminal be to need to consider.

In addition, if after the UE judgement Premable successful launch, will and launch Message3 according to the information configuration of RAR (Random Access Response, accidental access response).Transmitting power about Message3; By MAC (Medium Access Control; Medium access control) layer notifies the power ascension number of times that PREMABLE_RECEIVED_TARGET_POWER and Premable to the end carry out till launching altogether to physical layer; Total power ascension amount is calculated by following formula: (PREMABLE_TRANSMISSION_COUNTER – 1) * POWER_RAMP_STEP is provided with the transmitting power of concrete Message3 by physical layer.

Because the each repeat its transmission Premable of system can carry out one time power ascension at present; Therefore total power ascension amount can be sent number of times through total Premable and calculated, that is: (PREMABLE_TRANSMISSION_COUNTER – 1) * POWER_RAMP_STEP.

Under above-mentioned situation; When a plurality of UE use the identical Premable sign indicating number of very high power emission; Wherein the Premable sign indicating number of certain UE emission can be detected by the base station, and RAR will be replied in the base station, and these UE can think own Premable successful launch; Therefore can be according to the information configuration Message3 of RAR, and on same ascending resource, launch Message3.Because the content of the Message3 of each UE is different; And all use very big power to send out; This will detect Message3 to the base station and make a big impact, and possible all UE message3 when maximum retransmission reaches does not still receive successfully, finally all ends in failure.Whole process will be wasted a lot of resources, further influence the access of other-end.

And in UMTS (Universal Mobile Telecommunications System abbreviates UMTS as), the flow process that inserts at random mainly is divided into three steps, comprising:

Step 202: subscriber equipment is according to the Physical Random Access Channel and lead code (Signature) information of high level configuration; Obtain available access slot (Access Slots) and Signatures; Select an access slot and a lead code at random, and on the access slot of this selection, send this lead code;

Step 204: Node B (NodeB) is after the lead code that detects the UE transmission; There is being the descending AICH (Acquisition Indicator Channel, AICH Acquisition Indication Channel) of fixed timing relationship to go up the transmission accidental access response with the employed access slot of UE;

Step 206:UE is having receiving random access response on the descending AICH of fixed timing relationship with employed access slot; If that UE receives is ACK (Acknowledgement; Confirm), then on the up PRACH resource of appointment, send message part (Message Part); If that receive is NACK (Negative Acknowledgement, non-affirmation is replied), then to MAC layer feedback Nack on AICH received (the non-acknowledge message of AICH); If UE does not receive any response, then can adjust leading transmitting power and resend leadingly, wherein, leading process of transmitting mainly comprises following steps:

Step 1: judge whether leading transmission number of times has reached the maximum of sending number of times,, then do not have response to MAC layer feedback AICH if reached maximum; Simultaneously, if judge leading transmitted power, then there is not response to MAC layer feedback AICH greater than maximum transmit power 6dB yet;

Step 2: select at random one leading, and on last basis of once sending leading power, increase DP0=Power Ramp Step [dB] (power rising step-length, unit is dB), send leading power as this;

Step 3: select an available access slot at random;

Step 4: on this time slot, send leading.

In existing system; After UE carries out at random access attempts, if do not receive any response, when launching random access guiding once more subsequently; Will before send and increase DP0=Power Ramp Step [dB] on the leading power, send leading power as this.Wherein step-length can be configured to 1dB to 8dB.In physical layer random access procedure, can retransmit at most 64 times.

Identical with LTE is that along with the increase that UE sends the lead code number of times, transmitting power promotes with step-length DP0=Power Ramp Step [dB].After introducing a large amount of MD be that monitoring is type professional because a lot of MTC use, maybe a lot of MD reported data at one time, a large amount of MD so just might occur and insert at random simultaneously, collision probability is very high.If increase power when much MD are in random access procedure subsequently in this case, will inevitably cause the interference level on the RACH to promote, cause the detection performance of lead code to reduce.

In addition; After if UE receives ACK; Next can on PRACH, send message part (Message Part), and the transmitted power of Message Part also is to send the last time to increase P p-m=Pmessage-control – PPremable on the basis of leading power and obtain.Though in existing UMTS system, only be furnished with a PRACH; Promptly can not produce the phenomenon that a plurality of UE that clash send Message3 simultaneously in the similar LTE system, but very high Message Part transmitted power can impact still certainly to the leading detection that other UE sends.And; If the more than PRACH of configuration in the UMTS system; Then wherein the leading detection that not only can send the UE that uses this channel of the too high Message Part transmitting power on PRACH causes interference; Leading and detection Message Part that also can send the UE that uses all the other PRACH causes serious disturbance; Thereby cause the appearance of a large amount of power lifting phenomenons, cause leading and the power that is detected as Message Part sharply to reduce, further cause the access success rate of UE seriously to descend.

Summary of the invention

The object of the present invention is to provide lead code transmitted power in a kind of random access procedure control method, confirm method and system; To solve in the existing random access procedure; Great amount of terminals adopts identical preamble power setting and lead code maximum number of times of transmission to cause the system interference level to promote; Thereby cause the detection performance of lead code poor, and can cause the initial power of other message after lead code is sent successfully that inaccurate problem is set.In addition, the access procedure for domestic consumer also has considerable influence.

For addressing the above problem, the invention provides the control method that lead code is sent in a kind of random access procedure, comprising:

Network equipment is selected the terminal object of control and corresponding to the control information of said terminal object; Wherein, said control information is used to indicate said terminal object to carry out the configuration of lead code transmitted power and/or the configuration of lead code maximum number of times of transmission;

Said network equipment sends to pairing each terminal of said terminal object with said control information.

Further,

Comprise in the said control information that said network equipment is selected: any one or combination in any in the initial receiving target power of lead code, preamble power skew and the lead code maximum number of times of transmission corresponding to said terminal object.

Further,

Comprise in the said control information that said network equipment is selected: with respect to first side-play amount of the initial receiving target power of the lead code of carrying in the system broadcast message, with respect to second side-play amount of the preamble power skew of carrying in the system broadcast message and with respect to any one or combination in any in the 3rd side-play amount of the lead code maximum number of times of transmission of carrying in the system broadcast message corresponding to said terminal object.

Further,

The control mode that also comprises lead code in the said control information that said network equipment is selected corresponding to said terminal object; Wherein, the power control mode of said lead code comprises: in random access procedure, send one of number of times control and/or following mode according to the lead code maximum number of times of transmission that is disposed: in random access procedure, carry out power calculation according to the initial receiving target power of the lead code that is disposed; In random access procedure, carry out power calculation according to the preamble power skew of being disposed; In random access procedure, carry out power calculation according to initial receiving target power of the lead code that is disposed and preamble power skew.

Further,

Said network equipment sends to pairing each terminal of said terminal object with said control information, specifically comprises:

Said network equipment sends to object pairing each terminal in said terminal through control messages with said control information;

Wherein, said control messages be following any one: system broadcast message, accidental access response, beep-page message and dedicated signaling.

Further,

Said network equipment sends to pairing each terminal of said terminal object with said control information, specifically comprises: said network equipment adds identification information or the identification information of the terminal class selected of the terminal object of said selection in the said control messages of its transmission.

Further,

Said network equipment is selected the terminal object according to any one or combination in any in the following classification:

Person to person's communication terminal or machine and machine communication terminal; The type of service that the terminal will be initiated; Endpoint groups; The Hypomobility at terminal or fixed character; The priority facility at terminal; The access grade at terminal; The terminal is in Idle state or is in the Radio Link connected state.

Further,

Select at said network equipment before the terminal object and the control information corresponding to the terminal object of control, said method also comprises:

Said network equipment determines whether said lead code sent according to one of following parameter and controls: generate in the root sequence number, lead code form, sub-district of mode, the lead code of lead code user's proportion of composing in random access resource amount, sub-district channel circumstance of living in and the sub-district in cell congestion status, radius of society, the sub-district.

The method that the present invention also provides a kind of definite lead code to send is applied to comprise in the terminal:

Reception network equipment in terminal is the control information of the terminal object configuration of selection to its transmission; Wherein, said control information is used to indicate the corresponding terminal object to carry out the configuration of lead code transmitted power and/or the configuration of lead code maximum number of times of transmission;

The configuration of lead code transmitted power and/or the configuration of lead code maximum number of times of transmission are carried out according to said control information in said terminal.

Further,

Comprise in the said control information that said terminal receives: any one or combination in any in the initial receiving target power of lead code, preamble power skew and the lead code maximum number of times of transmission;

The configuration of lead code transmitted power is carried out according to said control information in said terminal, specifically comprises:

The initial receiving target power and/or the said lead code transmitted power of preamble power calculations of offset of the said lead code that receives used at said terminal;

The configuration of lead code maximum number of times of transmission is carried out according to said control information in said terminal, specifically comprises:

The transmission number of times of the said lead code maximum number of times of transmission control lead code that receives is used at said terminal.

Further,

Comprise in the said control information that said terminal receives: with respect to first side-play amount of the initial receiving target power of the lead code of carrying in the system broadcast message and/or with respect to second side-play amount of the preamble power skew of carrying in the system broadcast message;

Said terminal is according to said first side-play amount and/or said second side-play amount that receive; Correspondingly calculate initial receiving target power and/or the preamble power skew of the lead code that makes new advances in conjunction with said system broadcast message, utilize the initial receiving target power and/or the said lead code transmitted power of preamble power calculations of offset of said new lead code then.

Further,

The power control mode that also comprises lead code in the said control information that said terminal receives; Wherein, the power control mode of said lead code comprises: in random access procedure, send one of number of times control and/or following mode according to the lead code maximum number of times of transmission that is disposed: in random access procedure, carry out power calculation according to the initial receiving target power of the lead code that is disposed; In random access procedure, carry out power calculation according to the preamble power skew of being disposed; In random access procedure, carry out power calculation according to initial receiving target power of the lead code that is disposed and preamble power skew;

The transmission number of times of the said lead code maximum number of times of transmission control lead code that receives is used at said terminal;

Said lead code transmitted power is calculated according to the said power control mode that receives in said terminal.

Further,

Said terminal reception network equipment is the control information of the terminal object configuration of selection to its transmission, specifically comprises:

The control messages that said terminal reception network equipment sends is carried the control information into the terminal object configuration of said selection in the said control messages, and the identification information of the terminal class of the identification information of said terminal object or selection;

The configuration of lead code transmitted power and/or the configuration of lead code maximum number of times of transmission are carried out according to said control information in said terminal, specifically comprise:

After said control information is received at said terminal; The identification information through the said terminal object that carries in the said control messages or the identification information judgment of said terminal class go out said control messages be issue self the time, resolve said control messages and carry out the configuration of subsequent calculations operation and/or lead code maximum number of times of transmission.

Further,

When said terminal is system broadcast message, beep-page message or dedicated signaling in said control messages, carry out the configuration of lead code transmitted power and/or the configuration of lead code maximum number of times of transmission, specifically comprise according to said control information:

Said terminal is using the said control information that gets access to dispose said lead code transmitted power and/or lead code maximum number of times of transmission in the random access procedure next time;

When said terminal is accidental access response in said control messages, carry out the configuration of lead code transmitted power and/or the configuration of lead code maximum number of times of transmission, specifically comprise according to said control information:

Said terminal uses the control information that gets access to dispose said lead code transmitted power and/or lead code maximum number of times of transmission in this random access procedure.

Further, said method also comprises:

After said lead code was sent successfully, the initial receiving target power of the said lead code that receives and/or the transmitting power of preamble power calculations of offset Messages3 were used in said terminal.

Correspondingly, the present invention also provides the control system of lead code transmitted power in a kind of random access procedure, comprising:

In the network equipment first device is used to select the terminal object controlled and corresponding to the control information of said terminal object; Wherein, said control information is used to indicate said terminal object to carry out the configuration of lead code transmitted power and/or the configuration of maximum number of times of transmission;

In the network equipment second device is used for said control information is sent to pairing each terminal of said terminal object.

Further,

Comprise in the control information that in the said network equipment first device is selected: any one or combination in any in the initial receiving target power of lead code, preamble power skew and the lead code maximum number of times of transmission corresponding to said terminal object.

Further,

Comprise in the said control information that in the said network equipment first device is selected: with respect to first side-play amount of the initial receiving target power of the lead code of carrying in the system broadcast message, with respect to second side-play amount of the preamble power skew of carrying in the system broadcast message and with respect to any one or combination in any in the 3rd side-play amount of the lead code maximum number of times of transmission of carrying in the system broadcast message corresponding to said terminal object.

Further,

The control mode that also comprises lead code in the said control information that in the said network equipment first device is selected corresponding to said terminal object; Wherein, the power control mode of said lead code comprises: in random access procedure, send one of number of times control and/or following mode according to the lead code maximum number of times of transmission that is disposed: in random access procedure, carry out power calculation according to the initial receiving target power of the lead code that is disposed; In random access procedure, carry out power calculation according to the preamble power skew of being disposed; In random access procedure, carry out power calculation according to initial receiving target power of the lead code that is disposed and preamble power skew.

Further,

Second device in the said network equipment is used for said control information is sent to pairing each terminal of said terminal object, specifically comprises:

Second device in the said network equipment is used for through control messages said control information being sent to pairing each terminal of said terminal object;

Further,

Second device in the said network equipment is used for said control information is sent to pairing each terminal of said terminal object, specifically comprises: second device in the said network equipment is used for the identification information in the terminal class of the identification information of the terminal object of the said selection of said control messages interpolation of its transmission or selection.

Further,

First device in the said network equipment is used for according to following classification any one or combination in any the terminal object being selected:

Further,

First device in the said network equipment was used for before the terminal object of selecting control and the control information corresponding to the terminal object, determined whether said lead code sent according to one of following parameter and controlled: generate in the root sequence number, lead code form, sub-district of mode, the lead code of lead code user's proportion of composing in random access resource amount, sub-district channel circumstance of living in and the sub-district in cell congestion status, radius of society, the sub-district.

Correspondingly, the system that the present invention also provides a kind of definite lead code to send is applied to comprise in the terminal:

In the said terminal first device is used to receive the control information for the terminal object configuration selected of network equipment to its transmission; Wherein, said control information is used to indicate the corresponding terminal object to carry out the configuration of lead code transmitted power and/or the configuration of lead code maximum number of times of transmission;

Second device in the said terminal is used for carrying out the configuration of lead code transmitted power and/or the configuration of lead code maximum number of times of transmission according to said control information.

Further,

The network equipment that in the said terminal first device receives comprises to the control information for the terminal object configuration selected of its transmission: any one or combination in any in the initial receiving target power of lead code, preamble power skew and the lead code maximum number of times of transmission;

Second device in the said terminal is used for carrying out according to said control information the configuration of lead code transmitted power, specifically comprises:

Second device in the said terminal is used for using the initial receiving target power and/or the said lead code transmitted power of preamble power calculations of offset of the said lead code that first device at said terminal receives;

Further,

The network equipment that in the said terminal first device receives comprises to the control information for the terminal object configuration selected of its transmission: first side-play amount of the initial receiving target power of the lead code of carrying in respect to system broadcast message and/or with respect to system broadcast message in second side-play amount of the preamble power skew of carrying;

Second device in the said terminal is used for said first side-play amount and/or said second side-play amount that first device according to said terminal receives; Correspondingly calculate initial receiving target power and/or the preamble power skew of the lead code that makes new advances in conjunction with said system broadcast message, utilize the initial receiving target power and/or the said lead code transmitted power of preamble power calculations of offset of said new lead code then.

Further,

The network equipment that in the said terminal first device receives also comprises the power control mode of lead code in the control information for the terminal object configuration selected of its transmission; Wherein, the power control mode of said lead code comprises: in random access procedure, send one of number of times control and/or following mode according to the lead code maximum number of times of transmission that is disposed: in random access procedure, carry out power calculation according to the initial receiving target power of the lead code that is disposed; In random access procedure, carry out power calculation according to the preamble power skew of being disposed; Or in random access procedure, carry out power calculation according to initial receiving target power of the lead code that is disposed and preamble power skew;

Second device in the said terminal is used for carrying out according to said control information the configuration of lead code maximum number of times of transmission, specifically comprises:

Second device in the said terminal is used to use the transmission number of times of the said lead code maximum number of times of transmission control lead code that receives;

Second device in the said terminal is used for calculating said lead code transmitted power according to the said power control mode that receives.

Further,

First device in the said terminal is used to receive the control information for the terminal object configuration selected of network equipment to its transmission, specifically comprises:

First device in the said terminal is used to receive the control messages that network equipment sends; Carry control information in the said control messages into the terminal object configuration of said selection, and the identification information of the terminal class of the identification information of said terminal object or selection;

Second device in the said terminal is used for carrying out the configuration of lead code transmitted power and/or the configuration of lead code maximum number of times of transmission according to said control information, specifically comprises:

Second device in the said terminal is used for after first device at said terminal is received said control information; The identification information through the said terminal object that carries in the said control messages or the identification information judgment of said terminal class go out said control messages be issue self the time, resolve said control messages and carry out the configuration of subsequent calculations operation and/or lead code maximum number of times of transmission.

Further,

Second device in the said terminal is used for when said control messages is system broadcast message, beep-page message or dedicated signaling, carrying out the configuration of lead code transmitted power and/or the configuration of lead code maximum number of times of transmission according to said control information, specifically comprises:

Second device in the said terminal is used for the configuration of using the said control information that gets access to dispose said lead code transmitted power and/or lead code maximum number of times of transmission at random access procedure next time;

Second device in the said terminal is used for when said control messages is accidental access response, carries out the configuration of lead code transmitted power and/or the configuration of lead code maximum number of times of transmission according to said control information, specifically comprises:

Second device in the said terminal is used for when said control messages is accidental access response, in this random access procedure, uses the control information that gets access to dispose said lead code transmitted power and/or lead code maximum number of times of transmission.

Further, also comprise the 3rd device in the said terminal:

The 3rd device in the said terminal is used for after said lead code is sent successfully, uses the initial receiving target power of the said lead code that first device in the said terminal receives and/or the transmitting power of preamble power calculations of offset Messages3.

After adopting the present invention; Employed power was controlled when network equipment was selected the terminal transmission lead code of particular terminal or particular category; And control information is sent to the corresponding terminal of confirming to control of terminal object be used for power configuration; Avoided in random access procedure; Great amount of terminals adopts identical preamble power setting and the system interference level that causes promotes, thereby causes the detection poor-performing of lead code, and the initial power of other message of lead code after sending successfully is provided with inaccurate problem.Special, present embodiment can embody the priority at different classes of terminal, when reducing a large amount of MD terminal and inserting to the influence of ordinary terminal.

Description of drawings

Fig. 1 be in the prior art in the LTE system based on the flow chart of random access procedure of competition;

Fig. 2 is the control method flow chart of lead code transmitted power in the random access procedure in the embodiment of the invention;

Fig. 3 is the control method flow chart of lead code transmitted power in the random access procedure in the applying examples of the present invention;

Fig. 4 is the sketch map of employed MAC PDU form in the applying examples of the present invention;

Fig. 5 is the form sketch map of Backoff (rollback time) indication head in the applying examples of the present invention.

Embodiment

Hereinafter will combine accompanying drawing that embodiments of the invention are elaborated.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.

Present embodiment provides the control method of lead code transmitted power in a kind of random access procedure, and is as shown in Figure 2, and this method comprises:

Step S202: network equipment is selected the terminal object of control and corresponding to the control information of terminal object; Wherein, this control information is used to indicate the corresponding terminal object to carry out the configuration of lead code transmitted power and/or the configuration of maximum number of times of transmission;

Step S204: network equipment sends to corresponding pairing each terminal of terminal object with control information.

After this, the terminal of above-mentioned terminal object correspondence can use the control information that gets access to send the power configuration of lead code after random access code receives successfully.

Pass through above-mentioned steps; Employed power was controlled when network equipment was selected the terminal transmission lead code of particular terminal or particular category; And control information sent to the configuration that the corresponding terminal of confirming to control of terminal object is used for power configuration and/or lead code maximum number of times of transmission; Avoided in random access procedure; Great amount of terminals adopts identical preamble power setting and the system interference level that causes promotes, thereby causes the detection poor-performing of lead code, and the initial power of other message of lead code after sending successfully is provided with inaccurate problem.Special, present embodiment can embody the priority at different classes of terminal, when reducing a large amount of MD terminal and inserting to the influence of ordinary terminal.

More excellent ground; Before step S202, network equipment can determine whether that the power that needs the terminal to be sent lead code control according to one of following parameter: generate in the root sequence number, lead code form, sub-district of mode, the lead code of lead code user's proportion of composing in random access resource amount, sub-district channel circumstance of living in and the sub-district in cell congestion status, radius of society, the sub-district.When confirm needing to control to the power that lead code is sent at the terminal, execution in step S202 again.

Through the definite step in the preferred embodiment, realized that network equipment determines whether the power of terminal emission lead code is controlled according to cell parameter or lead code parameter, has improved the efficient and the accuracy of power control.

Preferably, comprise in the above-mentioned control information: any one or combination in any in the initial receiving target power of specific lead code, the skew of specific preamble power and the lead code maximum number of times of transmission.The preferred embodiment defines the content of control information, and counterpart terminal can carry out power configuration according to the relevant parameter of this information content after receiving this control information, has improved the accuracy of power control.

The power control mode that can also comprise in addition, lead code in the control information.Wherein, the control mode of lead code comprises: in random access procedure, send one of number of times control and/or following mode according to the lead code maximum number of times of transmission that is disposed: in random access procedure, carry out power calculation according to the initial receiving target power of the specific lead code that is disposed; In random access procedure, carry out power calculation according to the specific preamble power skew of being disposed; Or in random access procedure, carry out the calculating of power according to initial receiving target power of the specific lead code that is disposed and preamble power skew.

In another embodiment of the present invention; When not comprising the power control mode of lead code in the control information that receive at the terminal; If only comprised in initial receiving target power and specific these two parameters of preamble power skew of specific lead code in the control information, this parameter that then comprises in this terminal applies control information is carried out power calculation; As disposed above-mentioned two parameters simultaneously, then the terminal uses these two parameters to carry out power calculation simultaneously.

Network equipment can be to the terminal object of selecting initial receiving target power, preamble power skew and these three parameters of lead code maximum number of times of transmission or one of them of configuring preamble sign indicating number simultaneously; Correspondingly, the parameter of use is confirmed at the terminal according to the configuration of network side.If to any terminal or the specific parameter of any terminal class configuration, then the control of carrying out power calculation or sending number of times through the relevant parameter value of broadcast transmission is not used at the terminal to network side.

The initial receiving target power of specific lead code of network equipment configuration, the skew of specific preamble power and lead code maximum number of times of transmission are what to be different from through the initial receiving target power of lead code in the random access parameter of system broadcasts transmission, preamble power skew and lead code maximum number of times of transmission; Network equipment can be provided with different values to dissimilar terminals, perhaps be provided with in the existing system broadcasting with respect to the side-play amount of each parameter.

In step S204, network equipment can send to the corresponding corresponding terminal of terminal object with control information through control messages; Wherein, this control messages can adopt following any one: system broadcast message, accidental access response, beep-page message or dedicated signaling.Through this mode, network equipment notifies the terminal to carry out the configuration of power and/or lead code maximum number of times of transmission through the existing message of system, has reduced R&D costs.In addition, can also carry the identification information at each corresponding terminal of the terminal object of selection in this control messages or the terminal object selected under the identification information of classification; Then after this control information is received at a terminal; Can be through the terminal object that carries in this control messages under identification information or the terminal object at each corresponding terminal the identification information of classification judge whether this message issues self; If then resolve this message and carry out the subsequent configuration operation; Otherwise, abandon this message.

Preferably, the terminal object is all terminals, or the terminal object is confirmed according to one of following classification or its combination: H2H terminal or M2M terminal; The type of service that the terminal will be initiated; Endpoint groups; The Hypomobility at terminal (low mobility) or fixing (no mobility) characteristic; The priority facility at terminal; The access grade at terminal (access class); The terminal is in free time (idle) attitude or is in Radio Link and connects (RRC) connected state.Through this mode, realized being classified in the terminal of carrying out the power adjustment, select the terminal of specific classification to carry out power adjustment, the efficient and the flexibility that have improved power regulating method.

In this enforcement, a kind of method of definite lead code transmitted power is applied to comprise in the terminal:

The configuration of lead code transmitted power and/or the configuration of lead code maximum number of times of transmission are carried out according to said control information in the terminal.

After said control information was received at the terminal, the process of the concrete power configuration in random access procedure was following:

The terminal adopts following formula that the target power value of leading reception is set, the * POWER_RAMP_STEP of PREMABLE_RECEIVED_TARGET_POWER=PREMABLE_INITIAL_RECEIVED _ TARGET_POWER_NEW+DELTA_PREMABLE+(PREMABLE_TRANSMISSION_COUNTER-1).

Wherein used the specific lead code initial receiving target power P REMABLE_INITIAL_RECEIVED_TARGET_POWER_NEW of network side in the formula, rather than used the PREMABLE_INITIAL_RECEIVED_TARGET_POWER that disposes in the existing broadcast to this terminal configuration.

In like manner, the terminal specific preamble power skew DELTA_PREMABLE_NEW that also can use network side to be directed against this terminal configuration is provided with the target power value of leading reception.

If comprise the lead code maximum number of times of transmission in the control information that receive at the terminal, then will carry out the control that lead code is sent number of times by this number of times.As: when above-mentioned lead code maximum number of times of transmission value was 50, the number of times that lead code is sent at the terminal was at most 50.

If the terminal gets access to control information through system broadcast message, beep-page message or dedicated signaling, then using the control information that gets access to send the configuration of the power configuration and/or the lead code maximum number of times of transmission of lead code in the random access procedure next time; If the terminal gets access to control information through accidental access response, then in this random access procedure, use the control information that gets access to send the configuration of the power configuration and/or the lead code maximum number of times of transmission of lead code.Through this mode, realized the power of terminal preamble sign indicating number is controlled, reduced system interference, improved the detection performance of lead code simultaneously.

Correspondingly, in the present embodiment, the control system of lead code transmitted power in a kind of random access procedure comprises:

More excellent ground,

In the present embodiment, the system that a kind of definite lead code is sent is applied to comprise in the terminal:

More excellent ground,

More excellent ground, said terminal also comprises the 3rd device:

With an applying examples the present invention is further specified below.

As shown in Figure 3, the Poewr control method in the random access procedure comprises the steps:

Step S302: whether network equipment is controlled the Premable sign indicating number is sent at the terminal in random access procedure power according to the decision of the information of sub-district.

Preferably, it is one of following that the information of the sub-district among the step S302 comprises: the state of sub-district comprises cell congestion status, like the basic, normal, high different conditions that waits of Congestion Level SPCC of RACH channel; Cell type is like user's in random access resource amount, sub-district channel circumstance of living in, the sub-district in the root sequence number of the mode that generates lead code in radius of society, the sub-district, employing, Premable sign indicating number form, the sub-district proportion of composing etc.

Step S304: network equipment is confirmed the terminal object and the control mode of control.

Wherein, network equipment is confirmed the terminal object of control among the step S304, and as confirming terminals all in the sub-district, or the terminal of particular type, or specific terminal is sent the Premable sign indicating number and controlled in random access procedure.In this process, network equipment can be controlled to whole terminals or part terminal, and the part terminal can be the combination of following one or more:

(1) terminal of according to terminal types selecting: MTC terminal or H2H terminal;

(2) press the terminal that terminal mobility is selected: the terminal of ordinary terminal, Hypomobility, the terminal of fixed-site;

(3) terminal of selecting by terminal access delay requirement: to delay sensitive/insensitive terminal;

(4) press the terminal of call business type selecting: the Added Business type of for example common voice call, online or MTC etc.;

(5) terminal of selecting by end packet (group);

(6) press the terminal that ASC (Access Service Class, access service grade) selects;

(7) press the terminal that access priority is selected;

(8) the congested terminal of initiation of network equipment judgement;

(9) the part terminal selected by other modes of network equipment.

Preferably, the network equipment decision is carried out the control of which kind of mode to selected terminal among the step S304.

Above-mentioned control mode is different from the method for sending the power setting of Premable sign indicating number in the existing LTE system in the random access procedure, and it comprises following mode:

In random access procedure according to the initial receiving target power calculation of the lead code of being joined power; In random access procedure according to the preamble power calculations of offset power of being joined; In random access procedure according to the initial receiving target power of the lead code of being joined and the preamble power calculations of offset power of being joined; In random access procedure, send number of times control according to the lead code maximum number of times of transmission that is disposed;

Step S306: network equipment sends control information to corresponding terminal.

Preferably, network equipment carries out power control through one of following mode notice relevant terminal among the step S306:

Mode one: send corresponding indication, the terminal object that indication is suitable for, and corresponding control information through system broadcast message.

Preferably, adopt following detailed configuration information:

The terminal object indication information that consult at network equipment and terminal, for example: according to terminal types distinguish: MTC terminal=0, H2H terminal=1.

Control mode information: in random access procedure according to the lead code of being joined initial receiving target power calculation power or in random access procedure according to the preamble power calculations of offset power of being joined;

Need to prove, can comprise one or more combination of above information in the control information.If above-mentioned certain information is not comprised that then power calculation can be carried out by the default value with the prior information of arranging of network equipment in the terminal.The control messages of carrying this control information can be an existing systems message, perhaps is directed against the new system message of special-purpose.

Mode two: carry the control indication through MAC layer accidental access response protocol Data Unit (Protocol Data Unit abbreviates PDU as), wherein comprise suitable terminal object and corresponding control information.

Fig. 4 is the sketch map according to the MAC PDU form of the MAC head of the embodiment of the invention and RAR, and is as shown in Figure 4, MAC RAR PDU by a MAC head, zero or a plurality of MAC accidental access responses (MAC RAR) and possible filling bit form.Wherein, MAC PDU head is made up of one or more MAC PDU heads; Except that Backoff indication head, each son head is corresponding to a MAC RAR.Comprise Backoff if desired and indicate sub-head, then only comprise a Backoff in the MAC PDU head and indicate sub-head, and occur as first son head.

Fig. 5 is the Backoff indication sketch map that should use in the example; As shown in Figure 5; Backoff indication head comprises five head territory: E, T, R, R and BI, PDU variable size of MAC RAR, and be made up of following territory: E is an extension field; Extension field is a flag bit, is used for indicating the MAC head whether to also have other territory.If the value in E territory is set at " 1 ", then expression also has another group E/T/ random access lead code ID (RAPID) territory thereafter at least.If the value in E territory is set to " 0 ", then represent to be MAC RAR or filling bit from byte thereafter; T is a type field, and type field is a flag bit, is used for indicating that MAC head comprises is a random access lead code ID or a Backoff indication.If the value in T territory is " 0 ", then there is Backoff indication (BI) territory in the expression head; If the value in T territory is " 1 ", then there is a random access lead code ID (RAPID) territory in the expression head.R is a reserved bit, is set to " 0 " usually; BI is Backoff indication territory, and length is 4bits, is used to show that the sub-district is in overload.RAPID is the random access lead code identification field, and length is 6bits, is used to indicate the random access lead code that has sent.

To control indication in this example and be configured among the MAC RAR PDU, can adopt following mode: use two reservation bits in the existing Backoff indication head,, only can indicate the action of starting power control because amount of information is less.Preferably, if the distinguishing terminal object perhaps disposes extra parameter, can expand the size of Backoff indication head, perhaps dispose a special MAC RAR SDU, concrete extended mode can be provided with according to the true extension message length.

Mode three: carry the control indication through beep-page message, wherein comprise terminal object and the corresponding control information selected.

Beep-page message is the message that sensing specific user or user organize transmission.To issue specific user or user when organizing as paging (paging) signaling; Network equipment can combine the information such as situation of current area; Whether decision carries out special power control mode to this user or user's group at the RACH access procedure; If control, can in corresponding call signaling, add above-mentioned Premable control information, perhaps other configuration parameter.

Need to prove that beep-page message is used for notifying the terminal that downlink data arrival, system message update are arranged or orders the user to send upstream data etc.Except that system information was upgraded indication, the user needed connecting system to set up RRC connection, allocating power control strategy and object in beep-page message after receiving beep-page message.

Be different from general page message; Network equipment is not when having call signaling to be sent; If it carries out special power configuration in the random access procedure that carries out subsequently to the demanding terminal of certain terminal or certain type, also can realize through the beep-page message that above-mentioned Premable control information or other configuration parameter are carried in emission.Wherein, needing to identify this message through the increase flag bit and be merely power configuration information, is not common beep-page message.

Mode four: can adopt dedicated signaling to carry control information, especially for the UE that is in connected state, if this UE is in asynchronous regime, in the time will transmitting data, this UE need carry out the random access procedure based on competition equally, also can send the Premable sign indicating number.For this type UE; If network side will indicate it to carry out the power configuration operation; Can pass through dedicated signaling, as passing through DCI (the Downlink Control Information on the PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel); Downlink Control Information) carries the Premable control information, in random access procedure, carry out carrying out when the Premable sign indicating number is launched special power configuration to notify this UE.

Step S308: after the control information that network equipment sends is received at the terminal, according to the mode of network equipment indication, in random access procedure subsequently according to joining parameter the transmitting power and/or the maximum number of times of transmission of lead code are set.

The power control mode of network equipment indication as: in random access procedure according to the initial receiving target power calculation of the lead code of being joined power; In random access procedure according to the preamble power calculations of offset power of being joined; In random access procedure according to the initial receiving target power of the lead code of being joined and the preamble power calculations of offset power of being joined.

Need to prove that in practical application, for the normalization management, power control mode can be decided to be a certain mode approximately, the concrete mode that then in this process, does not need the control of special instructions power to be adopted.Perhaps adopt implicit mode, as indicate the mode of use according to the parameter of configuration, disposed in above-mentioned two parameters a parameter then the parameter of this configuration of terminal applies calculate; As disposed above-mentioned two parameters simultaneously, then the terminal uses these two parameters to calculate simultaneously.

Preferably, if arranged above-mentioned power control action only to specific terminal type, like the MTC terminal, the terminal object that then in above-mentioned network configuration mode, does not need special instructions to be suitable for, only the MTC terminal utilizes this information and carries out.

Step S310: after the terminal receives the RAR to the Premable sign indicating number of its emission, will specify ascending resource emission Message3, MAC will launch Message3 configuration of transmit power value for physical layer, and the concrete configuration mode has:

Mode one: it launches the used transmission power level of Premable sign indicating number for the last time;

Mode two: configuration according to the PREMABLE_INITIAL_RECEIVED_TARGET_POWER of the calculation of parameter that this terminal was suitable for and the power change amount when initially once launching the Premable sign indicating number to the end and.

Wherein,, use specific power contorl parameters, then calculate by the formula of the special parameter that is disposed according to the agreement regulation if this terminal is configured to said PREMABLE_INITIAL_RECEIVED_TARGET_POWER; Do not use specific power contorl parameters if this terminal is configured, then calculate by the formula of existing parameter in the system information according to the agreement regulation;

For the second way; The MAC layer also need be provided with a timer PREMABLE_RAMPING_COUNTER; The number of times of bring to power altogether when being used for being recorded in this terminal of random access procedure emission Premable sign indicating number, then the power change amount when initially once launching the Premable sign indicating number to the end equals PREMABLE_RAMPING_COUNTER*step.

Promote and the processing of following degradation if include simultaneously in the power control mode of configuration; And under the not necessarily identical situation of step-length; Then terminal inner can be added up a total power change amount; Initial value is 0, promotes a step1 as sending for the second time the Premable sign indicating number, then power change amount is increased step1; Subsequently, the step2 if power has descended then deducts a step2 to current power change amount, carries out successively.Last transmitting power equal initial power and power change amount with.

One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.

The above is merely the preferred embodiments of the present invention, is not to be used to limit protection scope of the present invention.According to summary of the invention of the present invention; Also other various embodiments can be arranged; Under the situation that does not deviate from spirit of the present invention and essence thereof, those of ordinary skill in the art are when making various corresponding changes and distortion according to the present invention, and are all within spirit of the present invention and principle; Any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. the control method that lead code is sent in the random access procedure comprises:

2. the method for claim 1 is characterized in that:

3. the method for claim 1 is characterized in that:

4. like claim 2 or 3 described methods, it is characterized in that:

5. like any described method in the claim 1 ~ 3, it is characterized in that:

6. method as claimed in claim 5 is characterized in that:

7. the method for claim 1 is characterized in that:

8. the method for claim 1 is characterized in that:

9. method that definite lead code is sent is applied to comprise in the terminal:

10. method as claimed in claim 9 is characterized in that:

11. method as claimed in claim 9 is characterized in that:

12., it is characterized in that like claim 10 or 11 described methods:

13., it is characterized in that like the described method of claim 9 ~ 11:

14. method as claimed in claim 13 is characterized in that:

15. method as claimed in claim 9 is characterized in that, also comprises:

16. the control system of lead code transmitted power in the random access procedure comprises:

In the network equipment first device is used to select the terminal object controlled and corresponding to the control information of said terminal object; Wherein, said control information is used to indicate said terminal object to carry out the configuration of lead code transmitted power and/or the configuration of lead code maximum number of times of transmission;

17. system as claimed in claim 16 is characterized in that:

18. system as claimed in claim 16 is characterized in that:

19., it is characterized in that like claim 17 or 18 described systems:

20., it is characterized in that like any described system in the claim 16 ~ 18:

21. system as claimed in claim 20 is characterized in that:

22. system as claimed in claim 16 is characterized in that:

23. system as claimed in claim 16 is characterized in that:

24. the system that definite lead code is sent is applied to comprise in the terminal:

25. terminal as claimed in claim 24 is characterized in that:

26. terminal as claimed in claim 24 is characterized in that:

27., it is characterized in that like claim 25 or 26 described terminals:

28., it is characterized in that like the described terminal of claim 24 ~ 26:

29. terminal as claimed in claim 28 is characterized in that:

30. terminal as claimed in claim 24 is characterized in that, also comprises the 3rd device: