CN102438305B - Power control method and terminal - Google Patents
Power control method and terminal Download PDFInfo
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- CN102438305B CN102438305B CN201010505986.XA CN201010505986A CN102438305B CN 102438305 B CN102438305 B CN 102438305B CN 201010505986 A CN201010505986 A CN 201010505986A CN 102438305 B CN102438305 B CN 102438305B
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Abstract
The invention discloses a power control method and a terminal. The method comprises the following steps that: the terminal determines to control the lead code sending power of the terminal; the terminal determines the power control mode of the control; and the terminal utilizes the power control mode to carry out power configuration on a lead code. According to the invention, the lead code detection performance can be improved.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of Poewr control method and terminal.
Background technology
Interpersonal communication (Human to Human, referred to as H2H) refers to that people communicates by the operation to equipment, and existing wireless communications technology is that the Communication Development based on H2H is got up.And communication (Machine to Machine, referred to as M2M) between machine to machine, sensu lato definition taking machine terminal intelligent interaction as core, application and the service of networking.It is based on intelligent machine terminal, and taking communication as access means, the informatization resolve scheme providing for client, for meeting 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, the space-time that it has broken through traditional communication mode limits and region obstacle, make enterprise and the public break away from cable constraint, allow client more effectively control cost, reduce mounting cost and easy to use.In addition, growing demand driving M2M and is constantly advanced, constantly increase with information processing capability and the network bandwidth and be conflictingly, the means of acquisition of information lag far behind, and M2M has well met this demand of people, can Real-Time Monitoring external environment condition by this technology people, realize on a large scale, the information gathering of automation.Therefore, M2M can be applied to the fields such as sector application, domestic. applications, individual application.In the use of industry application for example: traffic monitoring, warning system, rescue at sea, automatic vending machine, driving paying etc.In the use of domestic application domain for example: automatic data logging, temperature control etc.In the use in individual application field for example: life detection, far-end diagnosis etc.
The communication object of M2M is that machine is to machine or Human-to-Machine.Data communication between one or more machines is defined as machine type communication (Machine Type Communication, referred to as MTC), lessly in this case needs human-computer interaction.The machine that participates in MTC, is defined as MTC equipment (MTC Device, referred to as MD).MTC equipment is MTC user's terminal, can pass through public land mobile network (Public Land Mobile Network, referred to as PLMN) network and MTC equipment, MTC server and communicate.
Introduce after M2M application, can carry out some to existing system according to its feature and optimize, to meet M2M application demand, and the common UE in existing system is not exerted an influence.Some distinguishing features of M2M application comprise:
(1) MTC number of devices is a lot, according to the estimation of Vodafone, the MTC equipment of installing in the cell range of one, urban district, London will reach 3000, if so much more concentrated initiations of MTC equipment access at random, as same alarm in the situation such as fire, earthquake, very large impact will be brought to system.
(2) transfer of data is regular, and the data volume of each transmission is little, and transmission intercal is large
(3) location comparison of MTC equipment is fixed, and a large amount of MTC equipment can not change position after setting up, and this specific character is referred to as terminal location and fixes (no mobility); Or fast mobile terminal also only carries out in limited cell range, this specific character is referred to as Hypomobility (low mobility), and the cell range size of specifically regarding as Hypomobility is specified by operator.
In Long Term Evolution (Long Term Evolution, referred to as LTE), the random access procedure based on competition is as shown below, is mainly divided into four steps:
Step 102: subscriber equipment (User Equipment, referred to as UE) select at random a lead code (Preamble) code, in the upper transmission of Physical Random Access Channel (Physical Random Channel, referred to as PRACH).
Step 104: Node B (Node B) is after having detected that Preamble code sends, descending transmission accidental access response, in accidental access response, comprise following information: the numbering of the Preamble code of receiving, the time adjustment amount of the Preamble code correspondence of receiving, for the ascending resource position indication information of this terminal distribution, interim Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Temporary Cell Radio Network Temporary Identifier, referred to as Temporary C-RNTI) distributes.
Step 106:UE is receiving after accidental access response, according to its instruction, on the ascending resource distributing, sends upstream message.In this upstream message, at least should comprise: the unique identification (TMSI) of this terminal or random identification (Random ID).
Step 108:Node B receives the upstream message of UE, and returns to competition solution message to the successful UE of access.This competition solves in message and at least should comprise: the unique ID (TMSI) or the Random ID that access successful terminal.Wherein, the implementation that UE sends for random access guiding (preamble) comprises the steps:
Step 1: judge whether leading transmission times exceedes the maximum number of times of transmission of setting, if so, to a random access problems of upper strata instruction.
Step 2: the target power value of leading reception is set, PREAMBLE_RECEIVED_TARGET_POWER=PREAMBLE_INITIAL_RECEIVED _ TARGET_POWER+ (PREAMBLE_TRANSMISSION_COUNTER-1) * POWER_RAMP_STEP.
Step 3: determine next available random access opportunity.
Step 4: instruction physical layer is used selected PRACH resource to send a preamble, corresponding RA-RNTI, the target power that preamble index and preamble receive.
In existing system, UE carries out random access attempts (RACH attempt), if failure, subsequently again when random access signal transmission by increasing power.In random access procedure, power configuration is as follows:
PREAMBLE_RECEIVED_TARGET_POWER=preambleInitialReceivedTa rgetPower+DELTA_PREAMBLE+ (PREAMBLE_TRANSMISSION_COUNTER-1) * powerRampingStep; The step-length of increased power when wherein powerRampingStep represents that UE repeats to send Preamble code, can be configured to { 0dB, 2dB, 4dB, 6dB}, preambleInitialReceivedTargetPower is the Preamble code received power that the base station that sends by broadcast of system is expected, DELTA_PREAMBLE is a relevant power offset values of Premable code form of choosing, and PREAMBLE_TRANSMISSION_COUNTER represents that UE sends the number of times of Preamble code.If UE sends not response after Premable, at most can retry 200 times.
Along with the Preamble code transmission times of UE increases, transmitting power promotes with step-length powerRampingStep.Introducing after a large amount of MD, because a lot of MTC application are monitoring class business, may a lot of MD in reported data at the same time, there will be a large amount of MD to access at random simultaneously, collision probability is very high.If a lot of terminals (MD) increasing power when (RACH reattempt) in random access procedure subsequently in this case, will inevitably cause is that interference level promotes, and causes the detection Performance Ratio of lead code poor.
Summary of the invention
Main purpose of the present invention is to provide a kind of Poewr control method and terminal, solve above-mentioned correlation technique great amount of terminals lifting preamble power in random access procedure and cause system interference level to promote, thereby cause the poor problem of detection Performance Ratio of lead code.
To achieve these goals, according to an aspect of the present invention, provide a kind of Poewr control method.
Poewr control method according to the present invention comprises: the definite power that it is sent to lead code of terminal is controlled; Terminal is determined the power control mode of controlling; Terminal is used power control mode to carry out power configuration to lead code.
Further, the power of the definite lead code to its transmission of terminal is controlled and is comprised: the service attribute of the business of its initiation of terminal judges is that the business of single business or its initiation is predefined type business, determines the power of its transmission lead code is controlled.
Further, the power of the definite lead code to its transmission of terminal is controlled and is comprised: its terminal type of terminal judges is the fixing terminal in machine type communication MTC, position or the terminal of Hypomobility, determines the power of its transmission lead code is controlled.
Further, terminal is determined that the power of lead code to its transmission is controlled and is comprised: the business of the business of its initiation of terminal judges allows access delay to exceed scheduled duration or terminal access grade lower than predetermine level, and the power of definite lead code to its transmission is controlled.
Further, terminal determines that the power control mode of controlling is following mode one or a combination set of: in random access procedure, cancel bring to power; In random access procedure, random determine the whether bring to power of power of next time launching lead code; In random access procedure according to the first predetermined step-length bring to power; The lead code of the first pre-determined number in random access procedure is cancelled bring to power in retransmitting; During retransmitting, upper once lead code after the lead code of the second pre-determined number in random access procedure retransmits cancels bring to power; The lead code of the 3rd pre-determined number in random access procedure is cancelled bring to power in retransmitting, in the follow-up lead code of the 3rd pre-determined number retransmits according to the second predetermined step-length bring to power; During retransmitting, the lead code of the 4th pre-determined number in random access procedure by the 3rd predetermined step-length bring to power, during the lead code next time after the lead code of the 4th pre-determined number retransmits retransmits, cancels bring to power; During retransmitting, the lead code of the 5th pre-determined number in random access procedure by the 4th predetermined step-length bring to power, in the follow-up lead code of the 5th pre-determined number retransmits, presses the 5th predetermined step-length bring to power; In random access procedure, if preamble power reaches default lead code maximum power value, the power that sends lead code in definite lead code retransmission processes is next time lead code maximum power value; In random access procedure, if preamble power reaches default maximum power value, the power that sends lead code in definite lead code retransmission processes is next time the poor of maximum power value and the 6th predetermined step-length.
To achieve these goals, according to a further aspect in the invention, also provide a kind of terminal.
Terminal according to the present invention comprises: the first determination module, control for the power of determining the transmission lead code to its place terminal; The second determination module, for determining the power control mode of controlling; Power control module, for using power control mode to carry out power configuration to lead code.
Further, the first determination module comprises: first judges submodule, is that the business of single business or its initiation is predefined type business for judging service attribute that its place terminal initiates; Submodule is determined in the first power control, controls for the power of determining the transmission lead code to its place terminal.
Further, the first determination module comprises: second judges submodule, is the fixing terminal in machine type communication MTC, position or the terminal of Hypomobility for judging the terminal type of its place terminal; Submodule is determined in the second power control, controls for the power of determining the transmission lead code to its place terminal.
Further, the first determination module comprises: the 3rd judges submodule, for judging terminal access grade that the service access time delay of its place terminal exceedes scheduled duration or its place terminal lower than predetermine level; Submodule is determined in the 3rd power control, controls for the power of determining the transmission lead code to its place terminal.
Further, the second determination module determines that the power control mode of controlling is following mode one or a combination set of: in random access procedure, cancel bring to power; In random access procedure, random determine the whether bring to power of power of next time launching lead code; In random access procedure according to the first predetermined step-length bring to power; The lead code of the first pre-determined number in random access procedure is cancelled bring to power in retransmitting; During retransmitting, upper once lead code after the lead code of the second pre-determined number in random access procedure retransmits cancels bring to power; The lead code of the 3rd pre-determined number in random access procedure is cancelled bring to power in retransmitting, in the follow-up lead code of the 3rd pre-determined number retransmits according to the second predetermined step-length bring to power; During retransmitting, the lead code of the 4th pre-determined number in random access procedure by the 3rd predetermined step-length bring to power, during the lead code next time after the lead code of the 4th pre-determined number retransmits retransmits, cancels bring to power; During retransmitting, the lead code of the 5th pre-determined number in random access procedure by the 4th predetermined step-length bring to power, in the follow-up lead code of the 5th pre-determined number retransmits, presses the 5th predetermined step-length bring to power; In random access procedure, if preamble power reaches default lead code maximum power value, the power that sends lead code in definite lead code retransmission processes is next time lead code maximum power value; In random access procedure, if preamble power reaches default maximum power value, the power that sends lead code in definite lead code retransmission processes is next time the poor of maximum power value and the 6th predetermined step-length.
By the present invention, adopting terminal to determine controls the power of its transmission lead code, then use its definite power control mode to carry out power control to this lead code, avoid correlation technique in random access procedure, great amount of terminals promotes preamble power and causes system interference level to promote, thereby cause the poor problem of detection Performance Ratio of lead code, and then reached the effect that improves preamble detection performance.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is according to the flow chart of the random access procedure based on competition in the LTE system of correlation technique;
Fig. 2 is according to the flow chart of the Poewr control method of the embodiment of the present invention;
Fig. 3 is according to the structured flowchart of the terminal of the embodiment of the present invention;
Fig. 4 is the preferred structured flowchart according to the terminal of the embodiment of the present invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.
The present embodiment provides a kind of Poewr control method, and Fig. 2 is according to the flow chart of the Poewr control method of the embodiment of the present invention, and as shown in Figure 2, the method comprises:
Step S202: terminal is definite to be controlled the preamble power of its transmission.
Step S204: terminal is determined the power control mode of above-mentioned control.
Step S206: terminal is used power control mode to carry out power configuration to lead code.
Pass through above-mentioned steps, terminal is definite to be controlled the preamble power of its transmission, then use its definite power control mode to carry out power control to this lead code, avoid correlation technique in random access procedure, great amount of terminals promotes preamble power and causes system interference level to promote, thereby cause the poor problem of detection Performance Ratio of lead code, and then reached the effect that improves preamble detection performance.
Preferably, below one of step S202 is preferred embodiment described.The service attribute of the business of its initiation of terminal judges is that the business of single business or its initiation is predefined type business, determines that the power of the lead code to its transmission is controlled.Due in real system, single type of service terminal is arranged often in network, by the preferred embodiment, carries out power control for the terminal of single business, most of terminal of initiating random access calling is carried out to power control, improved the efficiency of power control.
Preferably, below one of step S202 is preferred embodiment described.Its terminal type of terminal judges is the fixing terminal in machine type communication MTC, position or the terminal of Hypomobility, determines that the power of the lead code to its transmission is controlled.In real system, for arranging that in network a large amount of MTC completes obtaining of bulk information, by the preferred embodiment, carry out power control for MTC terminal, most of terminal of initiating random access calling is carried out to power control, improved the efficiency of power control.
Preferably, below one of step S202 is preferred embodiment described.The business of the business of its initiation of terminal judges allows access delay to exceed scheduled duration or terminal access grade lower than predetermine level, determines that the power that it is sent to lead code controls.Pass through the preferred embodiment, exceeding scheduled duration or terminal access grade according to its service access time delay determines the power of lead code is controlled lower than predetermine level, the insensitive terminal of service delay and the lower terminal of priority are carried out to power control, realized the fairness of system.
Preferably, in step S204, terminal determines that the power control mode of controlling is following mode one or a combination set of: in random access procedure, cancel bring to power; In random access procedure, random determine the whether bring to power of power of next time launching lead code; In random access procedure according to the first predetermined step-length bring to power; The lead code of the first pre-determined number in random access procedure is cancelled bring to power in retransmitting; During retransmitting, upper once lead code after the lead code of the second pre-determined number in random access procedure retransmits cancels bring to power; The lead code of the 3rd pre-determined number in random access procedure is cancelled bring to power in retransmitting, in the follow-up lead code of the 3rd pre-determined number retransmits according to the second predetermined step-length bring to power; During retransmitting, the lead code of the 4th pre-determined number in random access procedure by the 3rd predetermined step-length bring to power, during the lead code next time after the lead code of the 4th pre-determined number retransmits retransmits, cancels bring to power; During retransmitting, the lead code of the 5th pre-determined number in random access procedure by the 4th predetermined step-length bring to power, in the follow-up lead code of the 5th pre-determined number retransmits, presses the 5th predetermined step-length bring to power; In random access procedure, if preamble power reaches default lead code maximum power value, the power that sends lead code in definite lead code retransmission processes is next time lead code maximum power value; In random access procedure, if preamble power reaches default maximum power value, the power that sends lead code in definite lead code retransmission processes is next time the poor of maximum power value and the 6th predetermined step-length.By multiple power control mode and the compound mode thereof of the preferred embodiment, terminal can adopt various power control mode neatly, has improved the flexibility of power control.
It should be noted that, this preferred embodiment describes for random access retransmission processes, in random access procedure, for example, for the first time in random access procedure, terminal also can adopt above-mentioned power setting mode, adopts which, can make terminal be linked into more efficiently in network.
Preferred embodiment one
This preferred embodiment provides a kind of Poewr control method, and the preferred embodiment combines above-described embodiment and preferred implementation wherein, and the present embodiment has been realized according to service attribute and judged terminal is carried out to power control, and the method comprises the steps:
Step 1, the service attribute of the business of its initiation of terminal judges is that the business of single business or its initiation is predefined type business.
For example: the monitoring class business in real system, generally, can predict and in the time that monitoring situation occurs, have multiple terminals initiating random access procedure simultaneously.
Step 2, terminal determines that the power control mode controlled is following one or a combination set of.
In random access procedure, cancel bring to power; In random access procedure, random determine the whether bring to power of power of next time launching lead code; In random access procedure according to the first predetermined step-length bring to power; The lead code of the first pre-determined number in random access procedure is cancelled bring to power in retransmitting; During retransmitting, upper once lead code after the lead code of the second pre-determined number in random access procedure retransmits cancels bring to power; The lead code of the 3rd pre-determined number in random access procedure is cancelled bring to power in retransmitting, in the follow-up lead code of the 3rd pre-determined number retransmits according to the second predetermined step-length bring to power; During retransmitting, the lead code of the 4th pre-determined number in random access procedure by the 3rd predetermined step-length bring to power, during the lead code next time after the lead code of the 4th pre-determined number retransmits retransmits, cancels bring to power; During retransmitting, the lead code of the 5th pre-determined number in random access procedure by the 4th predetermined step-length bring to power, in the follow-up lead code of the 5th pre-determined number retransmits, presses the 5th predetermined step-length bring to power; In random access procedure, if preamble power reaches default lead code maximum power value, the power that sends lead code in definite lead code retransmission processes is next time lead code maximum power value; In random access procedure, if preamble power reaches default maximum power value, the power that sends lead code in definite lead code retransmission processes is next time the poor of maximum power value and the 6th predetermined step-length.
It should be noted that, in actual applications, can be set in advance the power setting criterion that sends preamble code in random access procedure.
Preferred embodiment two
This preferred embodiment provides a kind of Poewr control method, the preferred embodiment combines above-described embodiment and preferred implementation wherein, it is that MTC judges terminal is carried out to power control that the present embodiment has been realized according to terminal type, and the method comprises the steps:
Step 1, its terminal type of terminal judges is the fixing terminal in MTC, position or the terminal of Hypomobility.
Step 2, terminal determines that the power control mode controlled is following one or a combination set of.
In random access procedure, cancel bring to power; In random access procedure, random determine the whether bring to power of power of next time launching lead code; In random access procedure according to the first predetermined step-length bring to power; The lead code of the first pre-determined number in random access procedure is cancelled bring to power in retransmitting; During retransmitting, upper once lead code after the lead code of the second pre-determined number in random access procedure retransmits cancels bring to power; The lead code of the 3rd pre-determined number in random access procedure is cancelled bring to power in retransmitting, in the follow-up lead code of the 3rd pre-determined number retransmits according to the second predetermined step-length bring to power; During retransmitting, the lead code of the 4th pre-determined number in random access procedure by the 3rd predetermined step-length bring to power, during the lead code next time after the lead code of the 4th pre-determined number retransmits retransmits, cancels bring to power; During retransmitting, the lead code of the 5th pre-determined number in random access procedure by the 4th predetermined step-length bring to power, in the follow-up lead code of the 5th pre-determined number retransmits, presses the 5th predetermined step-length bring to power; In random access procedure, if preamble power reaches default lead code maximum power value, the power that sends lead code in definite lead code retransmission processes is next time lead code maximum power value; In random access procedure, if preamble power reaches default maximum power value, the power that sends lead code in definite lead code retransmission processes is next time the poor of maximum power value and the 6th predetermined step-length.
It should be noted that, in actual applications, can be set in advance the power setting criterion that sends preamble code in random access procedure.
Preferred embodiment three
This preferred embodiment provides a kind of Poewr control method, the preferred embodiment combines above-described embodiment and preferred implementation wherein, the present embodiment has been realized according to the susceptibility of service delay and terminal access priority and has been judged terminal is carried out to power control, and the method comprises the steps:
Step 1, the permission access delay of the business of its initiation of terminal judges exceedes scheduled duration or terminal access grade lower than predetermine level.
Step 2, terminal determines that the power control mode controlled is following one or a combination set of.
In random access procedure, cancel bring to power; In random access procedure, random determine the whether bring to power of power of next time launching lead code; In random access procedure according to the first predetermined step-length bring to power; The lead code of the first pre-determined number in random access procedure is cancelled bring to power in retransmitting; During retransmitting, upper once lead code after the lead code of the second pre-determined number in random access procedure retransmits cancels bring to power; The lead code of the 3rd pre-determined number in random access procedure is cancelled bring to power in retransmitting, in the follow-up lead code of the 3rd pre-determined number retransmits according to the second predetermined step-length bring to power; During retransmitting, the lead code of the 4th pre-determined number in random access procedure by the 3rd predetermined step-length bring to power, during the lead code next time after the lead code of the 4th pre-determined number retransmits retransmits, cancels bring to power; During retransmitting, the lead code of the 5th pre-determined number in random access procedure by the 4th predetermined step-length bring to power, in the follow-up lead code of the 5th pre-determined number retransmits, presses the 5th predetermined step-length bring to power; In random access procedure, if preamble power reaches default lead code maximum power value, the power that sends lead code in definite lead code retransmission processes is next time lead code maximum power value; In random access procedure, if preamble power reaches default maximum power value, the power that sends lead code in definite lead code retransmission processes is next time the poor of maximum power value and the 6th predetermined step-length.
It should be noted that, in actual applications, can be set in advance the power setting criterion that sends preamble code in random access procedure.
The present embodiment provides a kind of terminal, and Fig. 3 is according to the structured flowchart of the terminal of the embodiment of the present invention, and as shown in Figure 3, this terminal comprises: the first determination module 32, the second determination module 34 and power control module 36, be elaborated to said structure below.
The first determination module 32, controls for the power of determining the transmission lead code to its place terminal; The second determination module 34, is connected to the first determination module 32, for determining the definite power control mode of controlling of the first determination module 32; Power control module 36, is connected to the second determination module 34, for using the definite power control mode of the second determination module 34 to carry out power configuration to lead code.
Fig. 4 is the preferred structured flowchart according to the terminal of the embodiment of the present invention, and as shown in Figure 4, the first determination module 32 comprises: first judges that submodule 321 and the first power control determine submodule 322; Second judges that submodule 323 and the second power control determine submodule 324; The 3rd judges that submodule 325 and the 3rd power control determine submodule 326; Below said structure is elaborated.
First judges submodule 321, is that the business of single business or its initiation is predefined type business for judging service attribute that its place terminal initiates; Submodule 322 is determined in the first power control, be connected to the first judgement submodule 321, be used for first and judge that the business that submodule 321 judges when the service attribute of its place terminal initiation is single business or its place terminal is initiated is predefined type business, determine the power of its place terminal transmission lead code is controlled.
Second judges submodule 323, is the fixing terminal in machine type communication (MTC), position or the terminal of Hypomobility for judging the terminal type of its place terminal; Submodule 324 is determined in the second power control, be connected to the second judgement submodule 323, be used for second and judge that submodule 323 judges when the terminal type of its place terminal is the terminal of the fixing terminal in MTC, position or Hypomobility, determine that the power of the transmission lead code to its place terminal is controlled.
The 3rd judges submodule 325, for judging terminal access grade that the service access time delay of business of initiation of its place terminal exceedes scheduled duration or its place terminal lower than predetermine level; Submodule 326 is determined in the 3rd power control, be connected to the 3rd judge module 325, while judge that for the 3rd judge module 325 terminal access grade that the service access time delay of the business of the initiation of its place terminal exceedes scheduled duration or its place terminal is lower than predetermine level, determine that the power of the lead code to its place terminal transmission is controlled.
Preferably, the second determination module 34 determines that the power control mode of controlling is following mode one or a combination set of:
In random access procedure, cancel bring to power; In random access procedure, random determine the whether bring to power of power of next time launching lead code; In random access procedure according to the first predetermined step-length bring to power; The lead code of the first pre-determined number in random access procedure is cancelled bring to power in retransmitting; During retransmitting, upper once lead code after the lead code of the second pre-determined number in random access procedure retransmits cancels bring to power; The lead code of the 3rd pre-determined number in random access procedure is cancelled bring to power in retransmitting, in the follow-up lead code of the 3rd pre-determined number retransmits according to the second predetermined step-length bring to power; During retransmitting, the lead code of the 4th pre-determined number in random access procedure by the 3rd predetermined step-length bring to power, during the lead code next time after the lead code of the 4th pre-determined number retransmits retransmits, cancels bring to power; During retransmitting, the lead code of the 5th pre-determined number in random access procedure by the 4th predetermined step-length bring to power, in the follow-up lead code of the 5th pre-determined number retransmits, presses the 5th predetermined step-length bring to power; In random access procedure, if preamble power reaches default lead code maximum power value, the power that sends lead code in definite lead code retransmission processes is next time lead code maximum power value; In random access procedure, if preamble power reaches default maximum power value, the power that sends lead code in definite lead code retransmission processes is next time the poor of maximum power value and the 6th predetermined step-length.
By above preferred embodiment of the present invention, the definite power that it is sent to lead code of terminal is controlled, then use its definite power control mode to carry out power control to this lead code, avoid correlation technique in random access procedure, great amount of terminals promotes preamble power and causes system interference level to promote, thereby cause the poor problem of detection Performance Ratio of lead code, and then reach the effect that improves preamble detection performance, simultaneously, above-mentioned Poewr control method does not rely on the operation of network side completely, independently carried out by terminal, independence and the efficiency of power control are improved.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in storage device and be carried out by calculation element, and in some cases, can carry out shown or described step with the order being different from herein, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module to be realized.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. a Poewr control method, is characterized in that, comprising:
The definite power that it is sent to lead code of terminal is controlled, wherein, the definite power that it is sent to lead code of described terminal is controlled one of the following mode that comprises: the service attribute of the business of described its initiation of terminal judges is that the business of single business or its initiation is predefined type business, determines the power of its transmission lead code is controlled; Its terminal type of described terminal judges is the fixing terminal in machine type communication MTC, position or the terminal of Hypomobility, determines the power of its transmission lead code is controlled; The business of the business of described its initiation of terminal judges allows access delay to exceed scheduled duration or terminal access grade lower than predetermine level, determines that the power of the lead code to its transmission is controlled;
Described terminal is determined the power control mode of described control;
Described terminal is used described power control mode to carry out power configuration to described lead code.
2. method according to claim 1, is characterized in that, described terminal determines that the power control mode of described control is following mode one or a combination set of:
In random access procedure, cancel bring to power;
In random access procedure, random determine the whether bring to power of power of next time launching lead code;
In described random access procedure according to the first predetermined step-length bring to power;
The lead code of the first pre-determined number in described random access procedure is cancelled bring to power in retransmitting;
During retransmitting, upper once lead code after the lead code of the second pre-determined number in described random access procedure retransmits cancels bring to power;
The lead code of the 3rd pre-determined number in described random access procedure is cancelled bring to power in retransmitting, in the follow-up lead code of described the 3rd pre-determined number retransmits according to the second predetermined step-length bring to power;
During retransmitting, the lead code of the 4th pre-determined number in described random access procedure by the 3rd predetermined step-length bring to power, during the lead code next time after the lead code of the 4th pre-determined number retransmits retransmits, cancels bring to power;
During retransmitting, the lead code of the 5th pre-determined number in described random access procedure by the 4th predetermined step-length bring to power, in the follow-up lead code of described the 5th pre-determined number retransmits, presses the 5th predetermined step-length bring to power;
In described random access procedure, if preamble power reaches default lead code maximum power value, the power that sends lead code in definite lead code retransmission processes is next time described lead code maximum power value;
In described random access procedure, if preamble power reaches default maximum power value, the power that sends lead code in definite lead code retransmission processes is next time the poor of described maximum power value and the 6th predetermined step-length.
3. a terminal, is characterized in that, comprising:
The first determination module, controls for the power of determining the transmission lead code to its place terminal, wherein,
It is one of following that described the first determination module comprises: first judges submodule, is that the business of single business or its initiation is predefined type business for judging service attribute that its place terminal initiates; Second judges submodule, is the fixing terminal in machine type communication MTC, position or the terminal of Hypomobility for judging the terminal type of its place terminal; The 3rd judges submodule, for judging terminal access grade that the service access time delay of its place terminal exceedes scheduled duration or its place terminal lower than predetermine level;
The second determination module, for determining the power control mode of described control;
Power control module, for using described power control mode to carry out power configuration to described lead code.
4. terminal according to claim 3, is characterized in that, described the second determination module determines that the power control mode of described control is following mode one or a combination set of:
In random access procedure, cancel bring to power;
In random access procedure, random determine the whether bring to power of power of next time launching lead code;
In described random access procedure according to the first predetermined step-length bring to power;
The lead code of the first pre-determined number in described random access procedure is cancelled bring to power in retransmitting;
During retransmitting, upper once lead code after the lead code of the second pre-determined number in described random access procedure retransmits cancels bring to power;
The lead code of the 3rd pre-determined number in described random access procedure is cancelled bring to power in retransmitting, in the follow-up lead code of described the 3rd pre-determined number retransmits according to the second predetermined step-length bring to power;
During retransmitting, the lead code of the 4th pre-determined number in described random access procedure by the 3rd predetermined step-length bring to power, during the lead code next time after the lead code of the 4th pre-determined number retransmits retransmits, cancels bring to power;
During retransmitting, the lead code of the 5th pre-determined number in described random access procedure by the 4th predetermined step-length bring to power, in the follow-up lead code of described the 5th pre-determined number retransmits, presses the 5th predetermined step-length bring to power;
In described random access procedure, if preamble power reaches default lead code maximum power value, the power that sends lead code in definite lead code retransmission processes is next time described lead code maximum power value;
In described random access procedure, if preamble power reaches default maximum power value, the power that sends lead code in definite lead code retransmission processes is next time the poor of described maximum power value and the 6th predetermined step-length.
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| WO2017183309A1 (en) * | 2016-04-20 | 2017-10-26 | シャープ株式会社 | Terminal device, base station device and communication method |
| CN107493608B (en) * | 2016-06-12 | 2020-06-05 | 电信科学技术研究院 | Method and equipment for random access |
| CN108617001B (en) | 2017-01-20 | 2022-11-18 | 中兴通讯股份有限公司 | Uplink data transmission method and device |
| CN108112065B (en) * | 2017-05-05 | 2023-09-26 | 中兴通讯股份有限公司 | Method and device for determining transmission power and configuring signaling, terminal and base station |
| CN109151980B (en) * | 2017-06-16 | 2021-01-08 | 维沃移动通信有限公司 | Method and terminal for controlling preamble sending power in random access process |
| WO2019006582A1 (en) * | 2017-07-03 | 2019-01-10 | Qualcomm Incorporated | System and method for latency reduction with delay-sensitive traffic |
| CN108093490B (en) * | 2017-12-26 | 2020-09-22 | Oppo广东移动通信有限公司 | Network switching control method and device |
| CN108235392B (en) * | 2017-12-26 | 2020-12-25 | Oppo广东移动通信有限公司 | Network switching control method and device |
| CN108112089A (en) * | 2018-01-05 | 2018-06-01 | 北京小米移动软件有限公司 | Accidental access method, device and non-transitorycomputer readable storage medium |
| CN110392442B (en) * | 2018-04-18 | 2022-06-14 | 华为技术有限公司 | Communication method and device |
| CN112425213B (en) * | 2018-10-22 | 2023-06-20 | Oppo广东移动通信有限公司 | Method, communication device, chip and medium for determining preamble sequence transmitting power |
| CN110536403B (en) * | 2019-04-30 | 2023-11-14 | 中兴通讯股份有限公司 | Power determination method, device, terminal and storage medium |
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