CN101998488B - Method and device for setting longest preserve time of special random access preamble - Google Patents
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Abstract
The invention discloses a method and device for setting the longest preserve time of a special random access preamble. The setting method comprises the following steps of: measuring the actual preserve time of a preset amount of special random access preambles, which is assigned by a network side in the preset time; and setting the longest preserve time of the special random access preamble by the network side according to the measured actual preserve time of the special random access preambles. The technical scheme of the invention is that the network side can dynamically set the longest preserve time of the special random access preamble when a terminal side in an LTE (Long Term Evolution) system accesses to the network by using a random access mode based on non-competition.
Description
Technical field
The present invention relates to the communications field, be specifically related to a kind of method to set up and device of longest preserve time of special random access preamble.
Background technology
As shown in Figure 1, Long Term Evolution (LTE, Long Term Evolution) network is by evolution Universal Terrestrial Radio Access Network (E-UTRAN, Evolved Universal Terrestrial Radio AccessNetwork) and evolution packet switching center (EPC, Evolved Packet Core) composition, network presents flattening.EUTRAN is connected with EPC by S1 interface.Wherein, EUTRAN, by multiple interconnective evolution base stations (eNB, Evolved NodeB) composition, connects by X2 interface between each eNB; EPC is by Mobility Management Entity (MME, Mobility Management Entity) and service gateway entity (S-GW, Serving Gateway) composition.
In LTE system, if subscriber equipment (User Equipment, UE) need to be mutual with network side, first UE need to obtain uplink synchronous, now, just need initiating random access procedure (RACHaccess procedure), be that first UE need to send random access guiding (Preamble), if there are two UE to send same Preamble at synchronization, will clash, must could finally obtain and the synchronizeing of network through conflict solution process.In order to meet the demand of some special screne, such as switch etc., random access procedure also can access by a kind of non-competing mode, in this process UE send Preamble can not clash.Corresponding random access procedure is divided into random access based on competition and two kinds of forms based on non-competing random access, in LTE, each community is 64 for the leading of random access, according to above-mentioned based on competition and non-competing Random Access, Preamble code has been divided into two groups, and the size of two groups is divided and determined by network side; Wherein special random access preamble is only applicable in the random access procedure based on non-competing.
Referring to Fig. 2, the random access procedure based on non-competing is described below substantially:
0, first eNB distributes special Preamble to UE by dedicated signaling, and wherein optional dedicated signaling can be specified the time-frequency domain position that sends this special random access preamble;
If 1 eNB has specified the time-frequency domain position of special random access preamble, UE sends special Preamble in the time-frequency domain position of specifying; Select a time-frequency domain position to send special Preamble otherwise UE is random;
2, eNB, after receiving, replys UE accidental access response at DSCH Downlink Shared Channel, if UE has listened to the response relevant to the own Special leader sending above on down control channel, thinks that this random access procedure is successful; Otherwise think the unsuccessful random access that may need again to initiate.
This Preamble in corresponding time-frequency domain resources during above-mentioned random access procedure is reserved, and is subject to reserved timer protection (such as timer T304), the longest preserve time that the timing length of reserved timer is this Preamble.Between advance dating, this special Preamble resource can not be given other UE again and used, and specifies time-frequency domain resources if eNB is not this Preamble, and this Preamble cannot distribute to other UE and uses on all time-frequency domains during this period.Corresponding special Preamble resource only have when UE be successfully completed corresponding random access procedure or corresponding timer overtime, just can be released, use to continue to give other UE.
Can be found out by description above, a Special leader in community in certain time-frequency domain resources of a certain moment can only be used by a UE at most, thereby has also ensured not disturb between UE.But the number of special Preamble limited (must be less than 64), the time-frequency domain resources that sends random access in a radio frames is also limited (must be less than 10), and the UE that a certain moment is initiated the random access procedure based on non-competing in network may have multiple, therefore may cause special Preamble not enough, thereby make to use the UE of the Random Access based on non-competing to have to use the Random Access based on competition, finally cause the delay of random access too large, or success rate reduce.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method to set up and device of longest preserve time of special random access preamble, in LTE system, when the Random Access access network of end side utilization based on non-competing, network side capable of dynamic arranges the longest preserve time of special random access preamble.
In order to address the above problem, the invention provides a kind of method to set up of longest preserve time of special random access preamble, comprising:
Measuring the actual of special random access preamble predetermined quantity or that interior network side of the scheduled time distributes sets aside some time; Network side is set aside some time according to the actual of measured multiple special random access preambles, and the longest preserve time of special random access preamble is set.
Further, described measurement some or a period of time in the special random access preamble that distributes of network side actual set aside some time and refer in such a way or one of them is measured:
Mode one, evolution base station are measured in the scheduled time or the special random access preamble of predetermined quantity starts to finish time t1 used to this random access procedure from distributing, using t1 as described actual setting aside some time; Wherein this random access procedure finishes to refer to that evolution base station is distributing after this special random access preamble, reaches the corresponding special random access preamble that described longest preserve time has received that terminal sends before;
Mode two, predetermined quantity, or the terminal of the random access procedure of initiation based on non-competing is measured from receiving that special random access preamble starts to finish time t2 used to this random access procedure in the scheduled time, t2 is reported to network side as described actual setting aside some time by measuring reporting message; Wherein this random access procedure finishes to refer to that UE is sending the accidental access response of receiving corresponding evolution base station after described special random access preamble; Wherein said measurement reporting message is the already present message of current agreement, or the special reporting message of setting aside some time.
Further, described method to set up also comprises:
Network side, in the time meeting trigger condition, starts to measure or notifies the terminal of the random access procedure of each initiation based on non-competing to start to measure; Described trigger condition is following any or its combination in any:
Condition one, network side is added up the special random access preamble number at a time having distributed and accounts for the ratio r1 of total special random access preamble number, and within the time period of a Preset Time length, r1 is greater than the first predetermined proportion threshold value always;
Condition two, network side is added up the special random access preamble number of receiving within the unit interval and accounts for the ratio r 2 of the total number of special random access preamble of distributing within this unit interval, and r2 is less than the second predetermined proportion threshold value.
Further, in the time of employing mode two, described terminal is measured described t2 when receiving after the signaling that network side notice starts to measure, or initiatively measures in the time of each random access; In the time receiving the signaling of network side notice reporting measurement result, report described t2, or at each successfully rear active reporting that accesses at random.
Further, described network side is set aside some time according to the actual of measured multiple special random access preambles, and the mode that the longest preserve time of special random access preamble is set comprises any in following mode:
Network side is determined the actual mean value of setting aside some time of described multiple special random access preambles, and the longest preserve time of described special random access preamble is set to described mean value, or being set to described mean value is multiplied by the product after a pre-determined factor;
The length of the longest preserve time of the described special random access preamble of network side is set to be less than the actual middle maximum of setting aside some time of described multiple special random access preambles, and makes the ratio that is less than or equal to this longest preserve time in actual the setting aside some time of described multiple special random access preambles be greater than one the 3rd proportion threshold value.
The present invention also provides a kind of setting device of longest preserve time of special random access preamble, comprising:
Measurement module, sets aside some time for measuring the actual of special random access preamble that network side distributes;
Memory module, sets aside some time for the actual of described special random access preamble that preserves predetermined quantity, or preserves the actual of described special random access preamble of measuring in the scheduled time and set aside some time;
Time block, for setting aside some time according to the actual of preserved multiple described special random access preambles, arranges the time span of the maximum protection timer of special random access preamble.
Further, described measurement module comprises one or more, is installed in evolution base station and/or each terminal;
When described measurement module is arranged in evolution base station, measures special random access preamble and start to finish time t1 used to this random access procedure from distributing, t1 is sent to described memory module as described actual setting aside some time; Wherein this random access procedure finishes to refer to that evolution base station is distributing after this special Preamble, reaches the corresponding special random access preamble that described longest preserve time has received that terminal sends before;
When described measurement module is arranged in each terminal, in the time that place terminal is initiated the random access procedure based on non-competing, measure and receive that from this terminal special random access preamble starts to finish time t2 used to this random access procedure, t2 is sent to described memory module as described actual setting aside some time by measuring reporting message; Wherein this random access procedure finishes to refer to that this terminal is sending the accidental access response of receiving corresponding evolution base station after described special random access preamble; Wherein said measurement reporting message is the already present message of current agreement, or the special reporting message of setting aside some time.
Further, described setting device also comprises:
Start module, for notifying described measurement module to start to measure in the time meeting trigger condition; Described trigger condition is following any or its combination in any:
Condition one, the special random access preamble number that statistics has at a time been distributed accounts for the ratio r1 of total special random access preamble number, and within the time period of a Preset Time length, r1 is greater than the first predetermined proportion threshold value always;
Condition two, the special random access preamble number that statistics is received within the unit interval accounts for the ratio r 2 of the total number of special random access preamble of distributing within this unit interval, and r2 is less than the second predetermined proportion threshold value.
Further, when described measurement module is arranged in each terminal, measures described t2 when receiving after the signaling that network side notice starts to measure, or initiatively measure in the time that each place terminal accesses at random; In the time receiving the signaling of network side notice reporting measurement result, report described t2, or access at random successfully rear active reporting in each place terminal.
Further, described time block is specially any in following mode according to the set aside some time mode of time span of maximum protection timer that special random access preamble is set of multiple special random access preambles actual:
Described time block is determined the actual mean value of setting aside some time of described multiple special random access preambles, the time span of the maximum protection timer of described special random access preamble is set to described mean value, or being set to described mean value is multiplied by the product after a pre-determined factor;
The time span of the maximum protection timer of the described special random access preamble of described time block is set to be less than the actual middle maximum of setting aside some time of described multiple special random access preambles, and makes the ratio that is less than or equal to this longest preserve time in actual the setting aside some time of multiple special random access preambles be greater than one the 3rd proportion threshold value.
Technical scheme of the present invention can the automatic, dynamic optimization time that corresponding special random access preamble is reserved in the random access procedure based on non-competing, thereby can improve the utilance of special random access preamble, improve the success rate of non-competing random access, reduce because of the not enough abnormal conditions that cause of special random access preamble, promote the service quality of network.
Brief description of the drawings
Fig. 1 is E-UTRAN network architecture schematic diagram;
Fig. 2 is the random access procedure flow chart based on non-competing;
Fig. 3 is that in application example one, eNB measures and optimizing process schematic diagram;
Fig. 4 is that in application example two, UE measures and optimizing process schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in detail.
For fear of the described problem in background technology, need to ensure special Preamble number as far as possible and send the time-frequency domain resources of random access, but may increase like this system cost or cause the waste of special Preamble and time-frequency domain resources; The present invention proposes to avoid special Preamble not enough by reduce the longest preserve time (such as reducing this leading maximum protection timer time length) of network side to this special Preamble as far as possible, makes to use the UE of the Random Access based on non-competing to have to use the problem of the Random Access based on competition; In addition, the present invention considers, if it is too short that the longest preserve time of this special Preamble arranges, may cause the UE that originally can successfully access and discharge corresponding special Preamble and cause proving an abortion because eNB judges overtime, therefore the minimizing of the longest preserve time to this special Preamble need to be in certain limit.
If the employing that arranges of the longest preserve time of above-mentioned special Preamble configures manually, cannot ensure dynamic adaptable and time variation, and the artificial network optimization efficiency participating in is not high, and the most important thing is that this can cause a large amount of human costs, Zhe Shi operator is reluctant to see.In current LTE agreement, clearly in Release9 version, supported self-organizing network function (Self-OrganizationNetwork, SON), SON can be according to current network performance, the parameter configuration of dynamic optimization network.Therefore, the present invention proposes and utilize SON to obtain particular network performance to optimize the longest preserve time of special Preamble.
Refer to the random access guiding resource relevant to certain fixing time-frequency domain resources for special random access preamble of the present invention, the identical random access lead code being distributed on different time-frequency domains also belongs to different random access guidings.
Embodiment mono-, a kind of method to set up of longest preserve time of special random access preamble, comprising:
Measuring the actual of special Preamble predetermined quantity or that interior network side of the scheduled time distributes sets aside some time; Network side is set aside some time according to the actual of measured multiple special Preamble, and the longest preserve time of special Preamble is set.
In the present embodiment, actual setting aside some time described measurement some or the special Preamble that interior network side of a period of time distributes can be, but not limited to refer in such a way or one of them measurement:
Mode one, eNB measure in the scheduled time or the special Preamble of predetermined quantity starts to finish time t1 used to this random access procedure from distributing, using t1 as described actual setting aside some time; Wherein this random access procedure finishes to refer to that eNB is distributing after this special Preamble, reaches the corresponding special Preamble that described longest preserve time has received that UE sends before;
Mode two, predetermined quantity, or the UE of the random access procedure of initiation based on non-competing measures from receiving that special Preamble starts to finish time t2 used to this random access procedure in the scheduled time, t2 is reported to network side as described actual setting aside some time by measuring reporting message; Wherein this random access procedure finishes to refer to that UE is sending the accidental access response of receiving corresponding eNB after described special Preamble.Wherein said measurement reporting message can be the already present message of current agreement, or the special reporting message of setting aside some time, and comprises described actual the setting aside some time that UE measures in message.
If adopt mode one and mode two simultaneously, be all as described actual setting aside some time using t1 and t2.
In practical application, do not get rid of yet and measure from distributing special Preamble to the time that sends or receive accidental access response, as described actual setting aside some time.
In the present embodiment, described network side can be, but not limited to as eNB.
In the present embodiment, described method to set up can also comprise:
Network side, in the time meeting trigger condition, starts to measure or notifies the UE of the random access procedure of each initiation based on non-competing to start to measure;
Described trigger condition can be, but not limited to as following any or its combination in any (such as trigger condition can be " condition one and condition two ", needing two all to meet, can be also " condition one or condition two ", meets any):
Condition one: network side is added up the special random access preamble number at a time having distributed and account for the ratio r1 of total special random access preamble number, and r1 is greater than the first predetermined proportion threshold value always within the time period of a Preset Time length;
Condition two: network side is added up the special random access preamble number of receiving within the unit interval and account for the ratio r 2 of the total number of special random access preamble of distributing within this unit interval, and r2 is less than the second predetermined proportion threshold value.
When practical application, can be as the case may be or actual needs described trigger condition is set; Also can measure always and arrange, or according to predetermined time interval periodically measure and arrange.
In the present embodiment, UE measures described t2 when receiving after the signaling that network side notice starts to measure, and can be also initiatively to measure in the time of each random access.
In the present embodiment, UE reports described t2 in the time receiving the signaling of network side notice reporting measurement result, can be also that UE is at each successfully rear active reporting that accesses at random.
In the present embodiment, described network side is set aside some time according to the actual of measured multiple special Preamble, and the mode that the longest preserve time of special Preamble is set specifically can be, but not limited to comprise any in following mode:
Network side is determined the actual mean value of setting aside some time of described multiple special Preamble, and the longest preserve time of described special Preamble is set to described mean value, or being set to described mean value is multiplied by the product after a pre-determined factor; Described pre-determined factor can be set according to experiment or actual conditions;
The length of the longest preserve time of the described special Preamble of network side is set to be greater than major part in actual the setting aside some time of described multiple special Preamble, is less than the actual middle maximum of setting aside some time of described multiple special Preamble; Here " being greater than the major part in actual the setting aside some time of described multiple special Preamble " refers to, the ratio that is less than or equal to this longest preserve time in actual the setting aside some time of described multiple special Preamble is greater than one the 3rd proportion threshold value.Described the 3rd proportion threshold value can arrange highlyer, can successfully be received by eNB to ensure the special random access preamble that the overwhelming majority is assigned with between advance dating, such as being 99%, in actual the setting aside some time of described multiple special Preamble, there is 99% length to be less than or equal to set described longest preserve time.
When practical application, can otherwise according to actual the setting aside some time of described multiple special Preamble, described longest preserve time be set, the effect of this longest preserve time is set to reach dynamic optimization.
All or part of in the parameters such as the described scheduled time, predetermined quantity, first, second, third proportion threshold value, time span, the time interval, pre-determined factor can be by OAM (Operation, Administration, Maintenance, operation, management, maintenance) configuration, or be the default configuration of network side.
Further the present embodiment is illustrated by several application examples below.
Application example one, its process as shown in Figure 3, comprising:
301, eNB opens the setting up procedure of setting aside some time for special random access preamble.ENB measures the actual t1 of setting aside some time of the special random access preamble using in based on non-competing random access procedure, and the actual t1 of setting aside some time of described special random access preamble refers to this leading time that finishes use from being assigned to UE to this random access procedure.The condition that this described random access procedure finishes refers to that eNB had received the corresponding special random access preamble that UE sends before reserved protection timer expiry.
302, the actual measurement result of setting aside some time of a large amount of special random access preambles that eNB reports according to the UE receiving, the optimal value that estimation special random access preamble is set aside some time, this optimal value is set to the longest preserve time of special random access preamble.
Further, the measuring process of application example one also can be completed by UE, and concrete example is as follows:
Application example two, its process as shown in Figure 4, comprising:
401, eNB distributes special random access guiding to UE by dedicated signaling, and wherein optional dedicated signaling can be specified the time-frequency domain position that sends this special random access preamble;
402, UE initiates based on non-competing random access procedure, and opens the measuring process for this special random access preamble holding time.UE measures the actual t2 of setting aside some time of corresponding special random access preamble, and the actual t2 of setting aside some time of described special random access preamble refers to from UE and receives that this special random access preamble finishes the used time to this random access procedure.The condition that this described random access procedure finishes refers to that UE is sending the accidental access response of having received corresponding eNB after leading.
403, UE sends and measures reporting message to eNB, and message has comprised corresponding special random access preamble holding time t2.Wherein said measurement reporting message can be the already present message of current agreement, or the special reporting message of setting aside some time.
The measurement result of a large amount of special random access preamble actual work times that 404, eNB reports according to the multiple UE that receive, the optimal value that estimation special random access preamble is set aside some time, this optimal value of setting aside some time can ensure that most special random access preambles that are assigned with can successfully be received by eNB between advance dating, and this optimal value is set to the longest preserve time of special random access preamble.The described overwhelming majority refers to that probability is greater than certain threshold value, and such as 99%, this threshold value is configured by OAM, or is eNB default configuration.
The method of the optimal value that described calculating special random access preamble is set aside some time, can be the mean value according to each measurement result, can be also probability of use distribution function etc., and these computational methods all belong to known technology, and the present invention does not describe in detail.
The above-mentioned setting up procedure of eNB optionally has the trigger condition of optimization, determines when eNB just opens the condition of above-mentioned setting.The embodiment of optional triggering method is described below substantially:
Application example three, triggering method is:
The utilization rate r1 of eNB statistics special random access preamble, the utilization rate r1 of described special random access preamble refers to that the special random access preamble number at a time having distributed accounts for the ratio of total special random access preamble number.The described current special random access preamble having distributed refers to current in reservation state, is protected timer protection, cannot distribute to the special random access preamble that other UE use.
If the utilization rate r1 of special random access preamble is greater than certain threshold value within certain period always, (such as 98%, this threshold value is configured by OAM or is eNB default configuration), eNB can open the optimizing process of setting aside some time for special random access preamble.Certain the wherein said period can be the absolute time section of specifying, and can be also a relative time length, such as exceeding for the first time at r1 in 1 hour of threshold value.
Application example four, triggering method is:
ENB adds up the success rate r2 of the random access procedure based on non-competing, and the success rate r2 of the described random access procedure based on non-competing refers to that eNB receives within the unit interval special random access preamble number accounts for the ratio of the total number of special random access preamble that eNB distributes during this.The described unit interval, such as 1 day or 1 hour etc., configured by OAM, or be eNB default configuration.
If the success rate r2 of the random access procedure based on non-competing is less than certain threshold value, (such as 90%, this threshold value is configured by OAM or is eNB default configuration), eNB can open the optimizing process of setting aside some time for special random access preamble.
Further, the optimization trigger condition described in application example three and application example four can be combined use.
Further, the measurement result described in application example three and application example four also can be used as the evaluation criteria of the random access procedure performance based on non-competing.Such as the longest preserve time of the special Preamble arranging in application example one and two can be at the interior successful access network of setting aside some time except meeting most UE, the utilization rate that also will ensure special random access preamble will be lower than certain threshold value, or the success rate of the random access procedure based on non-competing is higher than certain threshold value, threshold value wherein can be configured by OAM, or is eNB default configuration.
Embodiment bis-, a kind of setting device of longest preserve time of special random access preamble, comprising:
Measurement module, sets aside some time for measuring the actual of special Preamble that network side distributes;
Memory module, sets aside some time for preserving the actual of described special Preamble that the described measurement module of predetermined quantity measures, or preserves the actual of described special Preamble that in the scheduled time, described measurement module is measured and set aside some time;
Time block, for setting aside some time according to the actual of preserved multiple described special Preamble, arranges the time span of the maximum protection timer of special Preamble.
In the present embodiment, described measurement module comprises one or more, is installed in eNB and/or each UE;
When described measurement module is arranged in eNB, measures special Preamble and start to finish time t1 used to this random access procedure from distributing, t1 is sent to described memory module as described actual setting aside some time; Wherein this random access procedure finishes to refer to that eNB is distributing after this special Preamble, reaches the corresponding special Preamble that described longest preserve time has received that UE sends before;
When described measurement module is arranged in each UE, in the time that place UE initiates the random access procedure based on non-competing, measure and receive that from this UE special Preamble starts to finish time t2 used to this random access procedure, t2 is sent to described memory module as described actual setting aside some time by measuring reporting message; Wherein this random access procedure finishes to refer to that this UE is sending the accidental access response of receiving corresponding eNB after described special Preamble; Wherein said measurement reporting message can be the already present message of current agreement, or can be the special reporting message of setting aside some time, and comprises described the setting aside some time that UE measures in described measurement reporting message.
If described measurement module is installed in eNB and each UE simultaneously, t1 and t2 are kept in described memory module as described actual setting aside some time.
In practical application, actual the setting aside some time of also not getting rid of measurement module measurement is to distribute special Preamble to receive the time of accidental access response to transmission or UE from eNB.
In the present embodiment, described memory module and/or time block can be, but not limited to be arranged in eNB.
In the present embodiment, described setting device can also comprise:
Start module, for notifying described measurement module to start to measure in the time meeting trigger condition;
Described trigger condition can be, but not limited to as following any or its combination in any (such as trigger condition can be " condition one and condition two ", needing two all to meet, can be also " condition one or condition two ", meets any):
Condition one: the special random access preamble number that statistics has at a time been distributed accounts for the ratio r1 of total special random access preamble number, and r1 is greater than the first predetermined proportion threshold value always within the time period of a Preset Time length;
Condition two: the special random access preamble number that statistics is received within the unit interval accounts for the ratio r 2 of the total number of special random access preamble of distributing within this unit interval, and r2 is less than the second predetermined proportion threshold value.
When practical application, can be as the case may be or actual needs described trigger condition is set; Also can measure always and arrange, or according to predetermined time interval periodically measure and arrange.
In the present embodiment, when described measurement module is arranged in each terminal, sets aside some time described in measurement when receiving after the signaling that network side notice starts to measure, or initiatively measure in the time that each place terminal accesses at random; In the time receiving the signaling of network side notice reporting measurement result, report described t2, or access at random successfully rear active reporting in each place terminal.
In the present embodiment, described time block specifically can be, but not limited to as any in following mode according to the set aside some time mode of time span of maximum protection timer that special Preamble is set of multiple special Preamble actual:
Described time block is determined the actual mean value of setting aside some time of described multiple special Preamble, the time span of the maximum protection timer of described special Preamble is set to described mean value, or being set to described mean value is multiplied by the product after a pre-determined factor; Described pre-determined factor can be set according to experiment or actual conditions;
The time span of the maximum protection timer of the described special Preamble of described time block is set to be greater than major part in actual the setting aside some time of described multiple special Preamble, is less than the actual middle maximum of setting aside some time of described multiple special Preamble; Here " being greater than the major part in actual the setting aside some time of described multiple special Preamble " refers to, the ratio that is less than or equal to this longest preserve time in actual the setting aside some time of described multiple special Preamble is greater than one the 3rd proportion threshold value.
When practical application; described time block can otherwise arrange the time span of described maximum protection timer according to actual the setting aside some time of the described multiple special Preamble that measure, and the time span of the maximum protection timer of described special Preamble is set to reach dynamic optimization.
Certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of claim of the present invention.
Claims (8)
1. a method to set up for longest preserve time of special random access preamble, comprising:
Measuring the actual of special random access preamble predetermined quantity or that interior network side of the scheduled time distributes sets aside some time; Network side is set aside some time according to the actual of measured multiple special random access preambles, and the longest preserve time of special random access preamble is set;
Described measurement some or a period of time in the special random access preamble that distributes of network side actual set aside some time and refer in such a way or one of them is measured:
Mode one, evolution base station are measured in the scheduled time or the special random access preamble of predetermined quantity starts to finish time t1 used to this random access procedure from distributing, using t1 as described actual setting aside some time; Wherein this random access procedure finishes to refer to that evolution base station is distributing after this special random access preamble, reaches the corresponding special random access preamble that described longest preserve time has received that terminal sends before;
Mode two, predetermined quantity, or the terminal of the random access procedure of initiation based on non-competing is measured from receiving that special random access preamble starts to finish time t2 used to this random access procedure in the scheduled time, t2 is reported to network side as described actual setting aside some time by measuring reporting message; Wherein this random access procedure finishes to refer to that UE is sending the accidental access response of receiving corresponding evolution base station after described special random access preamble; Wherein said measurement reporting message is the already present message of current agreement, or the special reporting message of setting aside some time.
2. method to set up as claimed in claim 1, is characterized in that, also comprises:
Network side, in the time meeting trigger condition, starts to measure or notifies the terminal of the random access procedure of each initiation based on non-competing to start to measure; Described trigger condition is following any or its combination in any:
Condition one, network side is added up the special random access preamble number at a time having distributed and accounts for the ratio r1 of total special random access preamble number, and within the time period of a Preset Time length, r1 is greater than the first predetermined proportion threshold value always;
Condition two, network side is added up the special random access preamble number of receiving within the unit interval and accounts for the ratio r 2 of the total number of special random access preamble of distributing within this unit interval, and r2 is less than the second predetermined proportion threshold value.
3. method to set up as claimed in claim 2, is characterized in that:
In the time of employing mode two, described terminal is measured described t2 when receiving after the signaling that network side notice starts to measure, or initiatively measures in the time of each random access; In the time receiving the signaling of network side notice reporting measurement result, report described t2, or at each successfully rear active reporting that accesses at random.
4. method to set up as claimed any one in claims 1 to 3, it is characterized in that, described network side is set aside some time according to the actual of measured multiple special random access preambles, and the mode that the longest preserve time of special random access preamble is set comprises any in following mode:
Network side is determined the actual mean value of setting aside some time of described multiple special random access preambles, and the longest preserve time of described special random access preamble is set to described mean value, or being set to described mean value is multiplied by the product after a pre-determined factor;
The length of the longest preserve time of the described special random access preamble of network side is set to be less than the actual middle maximum of setting aside some time of described multiple special random access preambles, and makes the ratio that is less than or equal to this longest preserve time in actual the setting aside some time of described multiple special random access preambles be greater than one the 3rd proportion threshold value.
5. a setting device for longest preserve time of special random access preamble, is characterized in that, comprising:
Measurement module, sets aside some time for measuring the actual of special random access preamble that network side distributes;
Memory module, sets aside some time for the actual of described special random access preamble that preserves predetermined quantity, or preserves the actual of described special random access preamble of measuring in the scheduled time and set aside some time;
Time block, for setting aside some time according to the actual of preserved multiple described special random access preambles, arranges the time span of the maximum protection timer of special random access preamble;
Described measurement module comprises one or more, is installed in evolution base station and/or each terminal;
When described measurement module is arranged in evolution base station, measures special random access preamble and start to finish time t1 used to this random access procedure from distributing, t1 is sent to described memory module as described actual setting aside some time; Wherein this random access procedure finishes to refer to that evolution base station is distributing after this special Preamble, reaches the corresponding special random access preamble that described longest preserve time has received that terminal sends before;
When described measurement module is arranged in each terminal, in the time that place terminal is initiated the random access procedure based on non-competing, measure and receive that from this terminal special random access preamble starts to finish time t2 used to this random access procedure, t2 is sent to described memory module as described actual setting aside some time by measuring reporting message; Wherein this random access procedure finishes to refer to that this terminal is sending the accidental access response of receiving corresponding evolution base station after described special random access preamble; Wherein said measurement reporting message is the already present message of current agreement, or the special reporting message of setting aside some time.
6. setting device as claimed in claim 5, is characterized in that, also comprises:
Start module, for notifying described measurement module to start to measure in the time meeting trigger condition; Described trigger condition is following any or its combination in any:
Condition one, the special random access preamble number that statistics has at a time been distributed accounts for the ratio r1 of total special random access preamble number, and within the time period of a Preset Time length, r1 is greater than the first predetermined proportion threshold value always;
Condition two, the special random access preamble number that statistics is received within the unit interval accounts for the ratio r 2 of the total number of special random access preamble of distributing within this unit interval, and r2 is less than the second predetermined proportion threshold value.
7. setting device as claimed in claim 6, is characterized in that:
When described measurement module is arranged in each terminal, measures described t2 when receiving after the signaling that network side notice starts to measure, or initiatively measure in the time that each place terminal accesses at random; In the time receiving the signaling of network side notice reporting measurement result, report described t2, or access at random successfully rear active reporting in each place terminal.
8. the setting device as described in any one in claim 5 to 7; it is characterized in that, described time block is specially any in following mode according to the set aside some time mode of time span of maximum protection timer that special random access preamble is set of multiple special random access preambles actual:
Described time block is determined the actual mean value of setting aside some time of described multiple special random access preambles, the time span of the maximum protection timer of described special random access preamble is set to described mean value, or being set to described mean value is multiplied by the product after a pre-determined factor;
The time span of the maximum protection timer of the described special random access preamble of described time block is set to be less than the actual middle maximum of setting aside some time of described multiple special random access preambles, and makes the ratio that is less than or equal to this longest preserve time in actual the setting aside some time of multiple special random access preambles be greater than one the 3rd proportion threshold value.
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| DE112011105414T5 (en) | 2011-07-04 | 2014-04-24 | Broadcom Corporation | A method, apparatus and computer program products providing enhanced random access in a local network environment |
| CN106162762B (en) * | 2015-03-27 | 2019-07-02 | 中国移动通信集团山西有限公司 | A kind of method and device of determining switching timing time |
| CN107026744B (en) * | 2015-06-25 | 2020-04-14 | 中兴通讯股份有限公司 | Method and device for acquiring system start time and end time of terminal device |
| US10834757B2 (en) * | 2016-09-15 | 2020-11-10 | Qualcomm Incorporated | Methods and apparatus for channel reservation |
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| CN101394648A (en) * | 2007-09-17 | 2009-03-25 | 中兴通讯股份有限公司 | Terminal preamble sending method in time division duplexing system |
| CN101478792A (en) * | 2008-01-03 | 2009-07-08 | 大唐移动通信设备有限公司 | Dedicated random access resource preservation method and base station |
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| CN101394648A (en) * | 2007-09-17 | 2009-03-25 | 中兴通讯股份有限公司 | Terminal preamble sending method in time division duplexing system |
| CN101478792A (en) * | 2008-01-03 | 2009-07-08 | 大唐移动通信设备有限公司 | Dedicated random access resource preservation method and base station |
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