CN101801103A - Method, system and device of random access - Google Patents
Method, system and device of random access Download PDFInfo
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- CN101801103A CN101801103A CN200910078018A CN200910078018A CN101801103A CN 101801103 A CN101801103 A CN 101801103A CN 200910078018 A CN200910078018 A CN 200910078018A CN 200910078018 A CN200910078018 A CN 200910078018A CN 101801103 A CN101801103 A CN 101801103A
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Abstract
The invention relates to wireless communication technology, in particular to a method, a system and a device of random access, which is used for reducing the collision probability of terminals of random access and the loads of carrier waves. The method of the embodiment of the invention comprises the following steps: a terminal determines the parameter information of each available carrier wave in the system; the terminal compares the parameter information of each available carrier wave and determines an available carrier wave with the highest priority according to the comparison results; and the terminal carries out random access through the determined available carrier wave with the highest priority. The embodiment of the invention can reduce the collision probability of random access, improve the success probability of random access, reduce the time delay of the random access process and balance random access loads among carrier waves, thereby improving the system performance.
Description
Technical field
The present invention relates to wireless communication technology, particularly a kind of mthods, systems and devices that insert at random.
Background technology
Can only there be a carrier wave in present LTE (Long Term Evolution, Long Term Evolution) system in the sub-district, and maximum bandwidth is 20Mhz, shown in Figure 1A.
For LTE-A (LTE-Advanced strengthens Long Term Evolution) system, the peak rate of LTE-A system is greatly improved than LTE system, and the LTE-A system requirements reaches descending 1Gbps, up 500Mbps.Obviously, the bandwidth of 20Mhz can't satisfy this demand.For the LTE-A system can be met the requirements, introduce CA (Carrier Aggregation, carrier aggregation) technology, be in the same sub-district, continuous or discrete a plurality of carrier waves are concentrated in together, and are Terminal Service, so that required speed to be provided when needed simultaneously, therefore, the LTE-A system is a multicarrier system.Can work under the carrier wave of each polymerization for the terminal that guarantees the LTE-A system, each carrier wave maximum is no more than 20Mhz.The CA technology of LTE-A is shown in Figure 1B.
In the LTE-A system among Figure 1B, polymerization 4 carrier waves.Transfer of data can be carried out with terminal simultaneously in the base station on 4 carrier waves, to improve throughput of system.
Owing to have only a carrier wave, terminal can only select this carrier wave to insert at random, but in the LTE-A system a plurality of carrier waves is arranged in the LTE system, still continues to use the mode of LTE system at present, promptly allows all terminals all insert at random by a carrier wave.Like this, the collision probability of the terminal that inserts at random on this carrier wave will increase, and has strengthened the probability of access failure at random.
In addition, if a plurality of terminal all successfully inserts, then the access at random of this carrier wave load also can be bigger.
In sum, in the LTE-A system, the situation that a large amount of terminals resides in a carrier wave simultaneously probably occurs at present, thereby increased the collision probability of the terminal that inserts at random and the load of carrier wave.
Summary of the invention
The embodiment of the invention provides a kind of mthods, systems and devices that insert at random, in order to the collision probability that reduces the terminal that inserts at random and the load of carrier wave.
The method that a kind of multicarrier system that the embodiment of the invention provides inserts at random comprises:
Terminal is determined the parameter information of each available carrier wave in the system;
Described terminal compares the parameter information of each available carrier wave, and determines the available carrier wave that priority is the highest according to comparative result;
Described terminal inserts at random by the highest available carrier wave of determining of priority.
The system that a kind of multicarrier system that the embodiment of the invention provides inserts at random comprises the base station, and described system also comprises:
Terminal, be used for determining the parameter information of each available carrier wave of system, the parameter information of each available carrier wave is compared, and determine the available carrier wave that priority is the highest, insert at random by the highest available carrier wave of determining of priority according to comparative result.
A kind of terminal that the embodiment of the invention provides comprises:
The information determination module is used for determining the parameter information of each available carrier wave of system;
The first carrier determination module is used for the parameter information of each available carrier wave is compared, and determines the available carrier wave that priority is the highest according to comparative result;
First access module at random is used for inserting at random by the highest available carrier wave of determining of priority.
The method that the another kind of multicarrier system that the embodiment of the invention provides inserts at random comprises:
Terminal is determined the available carrier wave in the system;
Described terminal is selected an available carrier wave at random from the described available carrier wave of determining;
Described terminal inserts at random by the available carrier wave of selecting.
The system that the another kind of multicarrier system that the embodiment of the invention provides inserts at random comprises base station and terminal, and described terminal comprises:
The second carrier wave determination module is used for determining the available carrier wave of system;
Select module, be used for selecting an available carrier wave at random from the described available carrier wave of determining;
Second access module at random is used for inserting at random by the available carrier wave of selecting.
The another kind of terminal that the embodiment of the invention provides comprises:
The second carrier wave determination module is used for determining the available carrier wave of system;
Select module, be used for selecting an available carrier wave at random from the described available carrier wave of determining;
Second access module at random is used for inserting at random by the available carrier wave of selecting.
A kind of mode of the embodiment of the invention is the parameter information that terminal is determined each available carrier wave in the system; Described terminal compares the parameter information of each available carrier wave, and determines the available carrier wave that priority is the highest according to comparative result; Described terminal inserts at random by the highest available carrier wave of determining of priority.The another kind of mode of the embodiment of the invention is that terminal is determined the available carrier wave in the system; Described terminal is selected an available carrier wave at random from the described available carrier wave of determining; Described terminal inserts at random by the available carrier wave of selecting.Because terminal can insert at random by the available carrier wave of self selecting, thereby reduce the collision probability that inserts at random, improve the probability of success that inserts at random, but also can reduce the time delay of random access procedure, the load of access at random between balanced each carrier wave, and then improve systematic function.
Description of drawings
Figure 1A is the carrier wave schematic diagram of LTE system;
Figure 1B is the carrier wave schematic diagram of LTE-A system;
Fig. 2 is the structural representation of first kind of random access system of the embodiment of the invention;
Fig. 3 is first kind of terminal structure schematic diagram of the embodiment of the invention;
Fig. 4 is first kind of accidental access method schematic flow sheet of the embodiment of the invention;
Fig. 5 is the structural representation of second kind of random access system of the embodiment of the invention;
Fig. 6 is second kind of terminal structure schematic diagram of the embodiment of the invention;
Fig. 7 is second kind of accidental access method schematic flow sheet of the embodiment of the invention.
Embodiment
To be terminal compare the parameter information of each available carrier wave to a kind of mode of the embodiment of the invention, and determine the available carrier wave that priority is the highest according to comparative result, inserts at random by the highest available carrier wave of determining of priority.The another kind of mode of the embodiment of the invention is that terminal is determined the available carrier wave in the system; Described terminal is selected an available carrier wave at random from the described available carrier wave of determining; Described terminal inserts at random by the available carrier wave of selecting.Because terminal can insert at random by the available carrier wave of self selecting, thereby reduce the collision probability that inserts at random, improve the probability of success that inserts at random.
Below in conjunction with Figure of description the embodiment of the invention is described in further detail.
As shown in Figure 2, the system that inserts at random of the embodiment of the invention comprises: base station 10 and terminal 20.
In specific implementation process, base station 10 sends the broadcast of the parameter information that comprises each available carrier wave;
Then terminal 20 is determined the parameter information of each available carrier wave in the system from the broadcast of receiving.Perhaps
Need to prove that present embodiment is not limited to above-mentioned two kinds of modes of obtaining the parameter information of available carrier wave, any mode that can make terminal 20 obtain the parameter information of available carrier wave all is suitable for present embodiment.
Wherein, the parameter information of available carrier wave includes but not limited to one or more in the following parameters information:
The load of PRACH (Physical Random Access Channel) resource of the frequency of numerical priority value, carrier wave, the bandwidth of carrier wave, carrier wave, the Preamble (inserting pilot frequency sequence at random) of carrier wave sign indicating number, carrier wave, other carrier wave (for example insert relevant parameter at random, the maximum transmit power of Preamble sign indicating number, Msg3 HARQ (Msg3HARQ Hybrid Automatic Repeat Request, the automatic repeat requests of the mixing of random accessing message 3) maximum retransmission etc.).
If parameter information is a numerical priority value, be 0～8 such as priority limit, the base station can be made as 1 with the priority of carrier wave 1 so, and the priority of carrier wave 2 is made as 2, sends it to terminal by broadcast then; Preferable, the base station can be adjusted the priority of different carrier dynamically, reaches the balanced purpose that inserts at random.
In order to improve the flexibility of system, the base station 10 of present embodiment can also indicate terminal 20 to insert at random according to priority mode or according to the prior art mode.Concrete,
Such as, require terminal 20 to adopt priority mode, then the indication information of Fa Songing is to be used for the indication information (such as sending 0) that indicating terminal adopts priority mode to insert at random, terminal 20 just knows that after receiving 0 the employing priority mode inserts at random;
Require terminal 20 to adopt the mode of prior art, then the indication information of Fa Songing is to be used for the indication information (such as sending 1) that mode that indicating terminal adopts prior art inserts at random, and terminal 20 adopts the mode of prior art to insert at random with regard to knowing receiving after 1.
Need to prove that present embodiment is not limited to 0 and 1 indicating mode, the mode that other can indicating terminal all is suitable for present embodiment.
As shown in Figure 3, first kind of terminal of the embodiment of the invention comprises: information determination module 200, first carrier determination module 210 and first be access module 220 at random.
Wherein, the parameter information of available carrier wave includes but not limited to one or more in the following parameters information:
The load of the PRACH resource of the frequency of numerical priority value, carrier wave, the bandwidth of carrier wave, carrier wave, the Preamble sign indicating number of carrier wave, carrier wave, other carrier wave insert relevant parameter (for example, the maximum transmit power of Preamble sign indicating number, Msg3 HARQ maximum retransmission etc.) at random.
In specific implementation process, information determination module 200 is determined the parameter information of each available carrier wave in the system from the broadcast that the base station sends; Or
Message is obtained in transmission to the base station, and from the parameter information from definite each available carrier wave the feedback message of base station.
Need to prove that present embodiment is not limited to above-mentioned two kinds of modes of obtaining the parameter information of available carrier wave, any mode that can obtain the parameter information of available carrier wave all is suitable for present embodiment.
In specific implementation process, can also be with numerical priority value, the load of the PRACH resource of the frequency of carrier wave, the bandwidth of carrier wave, carrier wave, the Preamble sign indicating number of carrier wave, carrier wave, other carrier wave insert informix such as relevant parameter at random to be considered, and then definite priority.For example, the PRACH resource of the bandwidth of terminal known carrier wave and carrier wave, carry out priority ratio than the time, terminal will be given different weighted values to these two kinds of information, after the two quantification, multiply by weighted value more respectively, be the numerical priority value of this carrier wave after the gained results added.
First carrier determination module 210, the parameter information that is used for each available carrier wave that first carrier determination module 200 is determined compares, and determines the available carrier wave that priority is the highest according to comparative result.
Wherein, first carrier determination module 210 can pass through a kind of definite available carrier wave in the following manner:
The random access resource of each available carrier wave is compared (such as carrier bandwidths, available random access resource etc.), the available carrier wave that random access resource is maximum is defined as a highest available carrier wave of priority; Or
The load of each available carrier wave is compared, a minimum available carrier wave of load is defined as a highest available carrier wave of priority; Or
The attribute information of each available carrier wave is compared, attribute information is satisfied an available carrier wave that imposes a condition be defined as a highest available carrier wave of priority; Or
The available carrier wave that the numerical priority value of available carrier wave is the highest is defined as a highest available carrier wave of priority.
If attribute information is a frequency, the available carrier wave that first carrier determination module 210 is high or minimum with frequency is defined as a highest available carrier wave of priority, and just that centre frequency is a high or minimum available carrier wave is defined as a highest available carrier wave of priority.
Need to prove that present embodiment is not limited to the mode of above-mentioned definite carrier wave priority, anyly can determine that the mode of carrier wave priority all is suitable for present embodiment by the parameter information of available carrier wave.
In specific implementation process, a plurality of if the highest available carrier wave of priority has, then first carrier determination module 210 from a plurality of available carrier wave of determining, selects an available carrier wave as a highest available carrier wave of priority according to preset rule.
Preset rule includes but not limited to a kind of in the following rule:
Therefrom select an available carrier wave as a highest available carrier wave of priority at random; Redefine the highest available carrier wave of priority according to other modes again; In the identical and the highest available carrier wave scope of priority, determine the available carrier wave that priority is the highest according to other modes again.
After comparing according to load, the available carrier wave that priority is the highest has a plurality of, then can compare again according to random access resource again, or in the identical and the highest available carrier wave scope of priority, compare again according to random access resource.
If first at random the highest available carrier wave of priority determined by first carrier determination module 210 of access module 220 carry out access failure at random, need insert at random again, then first carrier determination module 210 is determined an available carrier wave that is used for inserting again in other available carrier wave first when access module 220 is carried out at random access failure by the highest available carrier wave of determining of priority at random.
First at random access module 220 insert at random by an available carrier wave that is used for inserting again of determining.
In specific implementation process, if first at random the highest available carrier wave of priority determined by first carrier determination module 210 of access module 220 carry out access failure at random, need insert at random, then the available carrier wave that first carrier determination module 210 also can be high with priority second is as an available carrier wave that inserts again again; Also can determine again that again the another one available carrier wave is as an available carrier wave that inserts again according to the mode of determining carrier wave priority.
If first at random access module 220 insert failure once more at random by an available carrier wave that is used for inserting again of determining, then first carrier determination module 210 redefines an available carrier wave (determining an available carrier wave in the never used available carrier wave) again, up to inserting at random successfully, perhaps the access of being undertaken by all available carrier wave is at random all failed, then first at random access module 220 determine access failures at random.
In order to improve the flexibility of system, terminal can determine whether to adopt priority mode to insert at random according to the indication of base station, and then the terminal of present embodiment can further include: first trigger module 230.
If terminal is received the indication information that mode that indicating terminal adopts prior art inserts at random that is used for from the base station, then terminal determines that according to the mode of prior art a carrier wave inserts at random.
As shown in Figure 4, first kind of accidental access method of the embodiment of the invention comprises the following steps:
Wherein, the parameter information of available carrier wave includes but not limited to one or more in the following parameters information:
The load of the PRACH resource of the frequency of numerical priority value, carrier wave, the bandwidth of carrier wave, carrier wave, the Preamble sign indicating number of carrier wave, carrier wave, other carrier wave insert relevant parameter (for example, the maximum transmit power of Preamble sign indicating number, Msg3 HARQ maximum retransmission etc.) at random.
If parameter information is a numerical priority value, be 0～8 such as priority limit, the base station can be made as 1 with the priority of carrier wave 1 so, and the priority of carrier wave 2 is made as 2, sends it to terminal by broadcast then; Preferable, the base station can be adjusted the priority of different carrier dynamically, reaches the balanced purpose that inserts at random.
In specific implementation process, terminal is determined the parameter information of each available carrier wave in the system from the broadcast that the base station sends; Or
Message is obtained in transmission to the base station, and from the parameter information from definite each available carrier wave the feedback message of base station.
Need to prove that present embodiment is not limited to above-mentioned two kinds of modes of obtaining the parameter information of available carrier wave, any mode that can obtain the parameter information of available carrier wave all is suitable for present embodiment.
Wherein, terminal can be passed through a kind of definite available carrier wave in the following manner:
The random access resource of each available carrier wave is compared (such as carrier bandwidths, available random access resource etc.), the available carrier wave that random access resource is maximum is defined as a highest available carrier wave of priority; Or
The load of each available carrier wave is compared, a minimum available carrier wave of load is defined as a highest available carrier wave of priority; Or
The attribute information of each available carrier wave is compared, attribute information is satisfied an available carrier wave that imposes a condition be defined as a highest available carrier wave of priority; Or
The available carrier wave that the numerical priority value of available carrier wave is the highest is defined as a highest available carrier wave of priority.
If attribute information is a frequency, the available carrier wave that terminal is high or minimum with frequency is defined as a highest available carrier wave of priority, and just that centre frequency is a high or minimum available carrier wave is defined as a highest available carrier wave of priority.
Need to prove that present embodiment is not limited to the mode of above-mentioned definite carrier wave priority, anyly can determine that the mode of carrier wave priority all is suitable for present embodiment by the parameter information of available carrier wave.
In specific implementation process, can also be with numerical priority value, the load of the PRACH resource of the frequency of carrier wave, the bandwidth of carrier wave, carrier wave, the Preamble sign indicating number of carrier wave, carrier wave, other carrier wave insert informix such as relevant parameter at random to be considered, and then definite priority.For example, the PRACH resource of the bandwidth of terminal known carrier wave and carrier wave, carry out priority ratio than the time, terminal will be given different weighted values to these two kinds of information, after the two quantification, multiply by weighted value more respectively, be the numerical priority value of this carrier wave after the gained results added.
In specific implementation process, a plurality of if the highest available carrier wave of priority has, then terminal from a plurality of available carrier wave of determining, selects an available carrier wave as a highest available carrier wave of priority according to preset rule.
Preset rule includes but not limited to a kind of in the following rule:
Therefrom select an available carrier wave as a highest available carrier wave of priority at random; Redefine the highest available carrier wave of priority according to other modes again; In the identical and the highest available carrier wave scope of priority, determine the available carrier wave that priority is the highest according to other modes again.
After comparing according to load, the available carrier wave that priority is the highest has a plurality of, then can compare again according to random access resource again, or in the identical and the highest available carrier wave scope of priority, compare again according to random access resource.
If terminal is carried out access failure at random by the highest available carrier wave of determining of priority, need insert at random again, then can further include after the step 402:
In the step 403, if terminal is being carried out access failure at random by the highest available carrier wave of determining of priority, the available carrier wave that terminal also can be high with priority second is as an available carrier wave of access again; Also can determine again that again the another one available carrier wave is as an available carrier wave that inserts again according to the mode of determining carrier wave priority.
If terminal inserts failure once more at random by an available carrier wave that is used for inserting again of determining, then terminal redefines an available carrier wave (determining an available carrier wave in the never used available carrier wave) again, up to inserting at random successfully, perhaps the access of being undertaken by all available carrier wave is at random all failed, and then terminal is determined access failure at random.
In order to improve the flexibility of system, terminal can determine whether to adopt priority mode to insert at random according to the indication of base station, concrete,
The base station determines according to predefined network strategy which kind of access way at random is terminal adopt, and then sends indication information.
Such as, require terminal to adopt priority mode, then the indication information of Fa Songing is to be used for the indication information (such as sending 0) that indicating terminal adopts priority mode to insert at random, terminal just knows that after receiving 0 the employing priority mode inserts at random;
Require terminal to adopt the mode of prior art, then the indication information of Fa Songing is to be used for the indication information (such as sending 1) that mode that indicating terminal adopts prior art inserts at random, and terminal adopts the mode of prior art to insert at random with regard to knowing receiving after 1.
Need to prove that present embodiment is not limited to 0 and 1 indicating mode, the mode that other can indicating terminal all is suitable for present embodiment.
Then can further include before the step 401:
Terminal determines to receive the indication information that indicating terminal adopts priority mode to insert at random that is used for from the base station
If terminal is received the indication information that mode that indicating terminal adopts prior art inserts at random that is used for from the base station, then terminal determines that according to the mode of prior art a carrier wave inserts at random.
As shown in Figure 5, second kind of random access system of the embodiment of the invention comprises: base station 50 and terminal 60.
Wherein, terminal 60 can be selected an available carrier wave at random according to random probability distribution (such as evenly distributing or other distribution of probability) from the available carrier wave of determining; Or
The parameter information of each available carrier wave of determining is compared, determine the access probability at random of each available carrier wave, and select at random according to the access probability of determining at random according to comparative result.
Wherein, the parameter information of available carrier wave includes but not limited to one or more in the following parameters information:
The load of the PRACH resource of the frequency of numerical priority value, carrier wave, the bandwidth of carrier wave, carrier wave, the Preamble sign indicating number of carrier wave, carrier wave, other carrier wave insert relevant parameter (for example, the maximum transmit power of Preamble sign indicating number, Msg3 HARQ maximum retransmission etc.) at random.
Parameter information such as available carrier wave is a bandwidth, and the bandwidth of two carrier waves is respectively 10MHz and 20MHz, and then the access probability at random of these two carrier waves is respectively 1/3 and 2/3.
In specific implementation process, base station 50 sends the broadcast of the parameter information that comprises each available carrier wave;
Then terminal 60 is determined the parameter information of each available carrier wave in the system from the broadcast of receiving.Perhaps
Need to prove that present embodiment is not limited to above-mentioned two kinds of modes of obtaining the parameter information of available carrier wave, any mode that can make terminal 60 obtain the parameter information of available carrier wave all is suitable for present embodiment.
In order to improve the flexibility of system, the base station 50 of present embodiment can also indicate terminal 60 to insert at random according to random fashion or according to the prior art mode.Concrete,
Such as, require terminal 60 to adopt random fashion, then the indication information of Fa Songing is to be used for the indication information (such as sending 0) that indicating terminal adopts priority mode to insert at random, terminal 60 just knows that after receiving 0 the employing random fashion inserts at random;
Require terminal 60 to adopt the mode of prior art, then the indication information of Fa Songing is to be used for the indication information (such as sending 1) that mode that indicating terminal adopts prior art inserts at random, and terminal 60 adopts the mode of prior art to insert at random with regard to knowing receiving after 1.
Need to prove that present embodiment is not limited to 0 and 1 indicating mode, the mode that other can indicating terminal all is suitable for present embodiment.
As shown in Figure 6, second kind of terminal of the embodiment of the invention comprises: the second carrier wave determination module 600, selection module 610 and second be access module 620 at random.
The second carrier wave determination module 600 is used for determining the available carrier wave of system.
Wherein, the second carrier wave determination module 600 is determined the available carrier wave in the system according to the frequency of available carrier wave in the system.Concrete, the second carrier wave determination module 600 can obtain the frequency of available carrier wave from network side (such as the base station); Also can be by the frequency of self measuring available carrier wave in the acquisition system.
Need to prove that present embodiment is not limited to above-mentioned two kinds of modes that obtain the frequency of available carrier wave, any mode that can obtain the frequency of available carrier wave all is suitable for present embodiment.
Wherein, select module 610 from the available carrier wave of determining, to select an available carrier wave at random according to random probability distribution (such as evenly distributing or other distribution of probability); Or
The parameter information of each available carrier wave of determining is compared, determine the access probability at random of each available carrier wave, and select at random according to the access probability of determining at random according to comparative result.
Wherein, the parameter information of available carrier wave includes but not limited to one or more in the following parameters information:
The load of the PRACH resource of the frequency of numerical priority value, carrier wave, the bandwidth of carrier wave, carrier wave, the Preamble sign indicating number of carrier wave, carrier wave, other carrier wave insert relevant parameter (for example, the maximum transmit power of Preamble sign indicating number, Msg3 HARQ maximum retransmission etc.) at random.
Parameter information such as available carrier wave is a bandwidth, and the bandwidth of two carrier waves is respectively 10MHz and 20MHz, and then the access probability at random of these two carrier waves is respectively 1/3 and 2/3.
If second at random access module 620 carry out access failure at random by the available carrier wave of selecting module 610 to select, need insert at random again, then select module 610 second when access module 620 is carried out at random access failure by the available carrier wave of determining at random, select an available carrier wave that is used for inserting again in other available carrier wave.
Second at random access module 620 insert at random by an available carrier wave that is used for inserting again of selecting module 610 to select.
In specific implementation process, if second at random access module 620 carry out access failure at random by the available carrier wave of selecting module 610 to select, need insert at random again, select module 610 also can determine the mode of the limit priority of available carrier wave, select the highest available carrier wave of priority as an available carrier wave that inserts again according to first carrier determination module among Fig. 3 210; Can also be again select an available carrier wave being used for inserting again again at random.Select module 610 to determine that by priority the mode of available carrier wave and first carrier determination module 210 determine that by priority the mode of available carrier wave is similar, repeat no more.
If second at random access module 620 insert failure once more at random by an available carrier wave that is used for inserting again of determining, then select module 610 to reselect an available carrier wave (selecting an available carrier wave in the never used available carrier wave) again, up to inserting at random successfully, perhaps the access of being undertaken by all available carrier wave is at random all failed, then second at random access module 620 determine access failures at random.
In order to improve the flexibility of system, terminal can determine whether to adopt random fashion to insert at random according to the indication of base station, and then the terminal of present embodiment can further include: second trigger module 630.
If terminal is received the indication information that mode that indicating terminal adopts prior art inserts at random that is used for from the base station, then terminal determines that according to the mode of prior art a carrier wave inserts at random.
As shown in Figure 7, second kind of accidental access method of the embodiment of the invention comprises the following steps:
Wherein, terminal is determined the available carrier wave in the system according to the frequency of available carrier wave in the system.Concrete, terminal can be obtained the frequency of available carrier wave from network side (such as the base station); Also can be by the frequency of self measuring available carrier wave in the acquisition system.
Need to prove that present embodiment is not limited to above-mentioned two kinds of modes that obtain the frequency of available carrier wave, any mode that can obtain the frequency of available carrier wave all is suitable for present embodiment.
Wherein, terminal can be selected an available carrier wave at random according to random probability distribution (such as evenly distributing or other distribution of probability) from the available carrier wave of determining; Or
The parameter information of each available carrier wave of determining is compared, determine the access probability at random of each available carrier wave, and select at random according to the access probability of determining at random according to comparative result.
Wherein, the parameter information of available carrier wave includes but not limited to one or more in the following parameters information:
The load of the PRACH resource of the frequency of numerical priority value, carrier wave, the bandwidth of carrier wave, carrier wave, the Preamble sign indicating number of carrier wave, carrier wave, other carrier wave insert relevant parameter (for example, the maximum transmit power of Preamble sign indicating number, Msg3 HARQ maximum retransmission etc.) at random.
Parameter information such as available carrier wave is a bandwidth, and the bandwidth of two carrier waves is respectively 10MHz and 20MHz, and then the access probability at random of these two carrier waves is respectively 1/3 and 2/3.
If the available carrier wave that terminal is selected is carried out access failure at random, need insert at random again, then can further include after the step 702:
When step 703, terminal are carried out at random access failure by the available carrier wave of determining, select an available carrier wave that is used for inserting again in other available carrier wave.
In the step 703, if terminal is carried out access failure at random by the available carrier wave of determining, terminal also can select the highest available carrier wave of priority as an available carrier wave that inserts again according to the mode of determining the limit priority of available carrier wave in Fig. 4 step 401; Can also be again select an available carrier wave being used for inserting again again at random.The terminal of present embodiment is determined to determine that by priority the mode of available carrier wave is similar in the mode of available carrier wave and Fig. 4 step 401 by priority, is repeated no more.
If terminal inserts failure once more at random by an available carrier wave that is used for inserting again of determining, then terminal is reselected an available carrier wave (selecting an available carrier wave in the never used available carrier wave) again, up to inserting at random successfully, perhaps the access of being undertaken by all available carrier wave is at random all failed, and then terminal is determined access failure at random.
In order to improve the flexibility of system, terminal can determine whether to adopt random fashion to insert at random according to the indication of base station.Concrete,
The base station determines according to predefined network strategy which kind of access way at random is terminal adopt, and then sends indication information.
Such as, require terminal to adopt random fashion, then the indication information of Fa Songing is to be used for the indication information (such as sending 0) that indicating terminal adopts random fashion to insert at random, terminal just knows that after receiving 0 the employing random fashion inserts at random;
Require terminal to adopt the mode of prior art, then the indication information of Fa Songing is to be used for the indication information (such as sending 1) that mode that indicating terminal adopts prior art inserts at random, and terminal adopts the mode of prior art to insert at random with regard to knowing receiving after 1.
Need to prove that present embodiment is not limited to 0 and 1 indicating mode, the mode that other can indicating terminal all is suitable for present embodiment.
Then can further include before the step 701:
Terminal determines to receive the indication information that indicating terminal adopts random fashion to insert at random that is used for from the base station.
If terminal is received the indication information that mode that indicating terminal adopts prior art inserts at random that is used for from the base station, then terminal determines that according to the mode of prior art a carrier wave inserts at random.
From the foregoing description as can be seen: a kind of mode of the embodiment of the invention is the parameter information that terminal is determined each available carrier wave in the system; Described terminal compares the parameter information of each available carrier wave, and determines the available carrier wave that priority is the highest according to comparative result; Described terminal inserts at random by the highest available carrier wave of determining of priority.The another kind of mode of inventive embodiments is that terminal is determined the available carrier wave in the system; Described terminal is selected an available carrier wave at random from the described available carrier wave of determining; Described terminal inserts at random by the available carrier wave of selecting.Because terminal can insert at random by the available carrier wave of self selecting, thereby reduce the collision probability that inserts at random, improve the probability of success that inserts at random, but also can reduce the time delay of random access procedure, the load of access at random between balanced each carrier wave, and then improve systematic function.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (30)
1. the method that multicarrier system inserts at random is characterized in that, this method comprises:
Terminal is determined the parameter information of each available carrier wave in the system;
Described terminal compares the parameter information of each available carrier wave, and determines the available carrier wave that priority is the highest according to comparative result;
Described terminal inserts at random by the highest available carrier wave of determining of priority.
2. the method for claim 1 is characterized in that, described terminal is determined the parameter information of each available carrier wave in the system according to the following step:
Described terminal is determined the parameter information of each available carrier wave in the system from the broadcast that the base station sends; Or
Described terminal sends to the base station and obtains message, and from the parameter information from definite each available carrier wave the feedback message of base station.
3. method as claimed in claim 1 or 2 is characterized in that described terminal compares the parameter information of each available carrier wave, and determines that according to comparative result a highest available carrier wave of priority comprises:
Described terminal compares the random access resource of each available carrier wave, and the available carrier wave that random access resource is maximum are defined as a highest available carrier wave of priority; Or
Described terminal compares the load of each available carrier wave, and a minimum available carrier wave of load is defined as a highest available carrier wave of priority; Or
Described terminal compares the attribute information of each available carrier wave, attribute information is satisfied an available carrier wave that imposes a condition be defined as a highest available carrier wave of priority; Or
The available carrier wave that described terminal is the highest with the numerical priority value of available carrier wave is defined as a highest available carrier wave of priority.
4. method as claimed in claim 3 is characterized in that, if described attribute information is a frequency, the available carrier wave that frequency is high or minimum is defined as a highest available carrier wave of priority.
5. the method for claim 1, it is characterized in that the highest if described terminal defines the priority of a plurality of available carrier wave, described terminal is according to preset rule, from a plurality of available carrier wave of determining, select an available carrier wave as a highest available carrier wave of priority.
6. the method for claim 1 is characterized in that, this method also comprises:
When described terminal is carried out at random access failure by the highest available carrier wave of determining of priority, determine an available carrier wave that is used for inserting again in other available carrier wave;
Described terminal inserts at random by an available carrier wave that is used for inserting again of determining.
7. the method for claim 1 is characterized in that, described terminal also comprises before the parameter information of each available carrier wave is compared:
Described terminal determines to receive the indication information that indicating terminal adopts priority mode to insert at random that is used for from the base station.
8. the system that multicarrier system inserts at random comprises base station and terminal, it is characterized in that, described terminal comprises:
The information determination module is used for determining the parameter information of each available carrier wave of system;
The first carrier determination module is used for the parameter information of each available carrier wave is compared, and determines the available carrier wave that priority is the highest according to comparative result;
First access module at random is used for inserting at random by the highest available carrier wave of determining of priority.
9. system as claimed in claim 8 is characterized in that, described base station is used for:
Transmission comprises the broadcast of the parameter information of each available carrier wave;
Described information determination module is used for:
From the described broadcast of receiving, determine the parameter information of each available carrier wave in the system;
Or
Described base station is used for:
Receive from described terminal obtain message after, send the feedback message of the parameter information that comprises each available carrier wave to described terminal;
Described information determination module is used for:
Send the described message of obtaining, and from the described feedback message of receiving, determine the parameter information of each available carrier wave.
10. system as claimed in claim 8 is characterized in that, described base station also is used for:
Be used for the indication information that indicating terminal adopts priority mode to insert at random to described terminal transmission;
Described terminal also comprises:
First trigger module: be used for after receiving described indication information, trigger described first carrier determination module the parameter information of each available carrier wave is compared.
11. a terminal is characterized in that, described terminal comprises:
The information determination module is used for determining the parameter information of each available carrier wave of system;
The first carrier determination module is used for the parameter information of each available carrier wave is compared, and determines the available carrier wave that priority is the highest according to comparative result;
First access module at random is used for inserting at random by the highest available carrier wave of determining of priority.
12. terminal as claimed in claim 11 is characterized in that, described information determination module is used for:
From the broadcast that the base station sends, determine the parameter information of each available carrier wave in the system; Or
Message is obtained in transmission to the base station, and from the parameter information from definite each available carrier wave the feedback message of base station.
13., it is characterized in that described first carrier determination module is used for as claim 11 or 12 described terminals:
The random access resource of each available carrier wave is compared, and the available carrier wave that random access resource is maximum are defined as a highest available carrier wave of priority; Or
The load of each available carrier wave is compared, a minimum available carrier wave of load is defined as a highest available carrier wave of priority; Or
The attribute information of each available carrier wave is compared, attribute information is satisfied an available carrier wave that imposes a condition be defined as a highest available carrier wave of priority; Or
The available carrier wave that the numerical priority value of available carrier wave is the highest is defined as a highest available carrier wave of priority.
14. terminal as claimed in claim 13 is characterized in that, if described attribute information is a frequency, the available carrier wave that described first carrier determination module is high or minimum with frequency is defined as a highest available carrier wave of priority.
15. terminal as claimed in claim 11 is characterized in that, described first carrier determination module also is used for:
The highest in the priority that defines a plurality of available carrier wave, according to preset rule, from a plurality of available carrier wave of determining, select an available carrier wave as a highest available carrier wave of priority.
16. terminal as claimed in claim 11 is characterized in that, described first carrier determination module also is used for:
Described first when access module is carried out at random access failure by the highest available carrier wave of determining of priority at random, determine an available carrier wave that is used for inserting again in other available carrier wave;
Described first at random access module be used for:
Insert at random by an available carrier wave that is used for inserting again of determining.
17. terminal as claimed in claim 11 is characterized in that, described terminal also comprises:
First trigger module is used for receiving from after being used for indicating terminal and adopting the indication information that priority mode inserts at random of base station, triggers described first carrier determination module the parameter information of each available carrier wave is compared.
18. the method that multicarrier system inserts at random is characterized in that, this method comprises:
Terminal is determined the available carrier wave in the system;
Described terminal is selected an available carrier wave at random from the described available carrier wave of determining;
Described terminal inserts at random by the available carrier wave of selecting.
19. method as claimed in claim 18 is characterized in that, described terminal selects an available carrier wave to comprise from the described available carrier wave of determining at random:
Described terminal is selected an available carrier wave according to random probability distribution at random from the described available carrier wave of determining; Or
The parameter information of each available carrier wave that described terminal will be determined compares, and determines the access probability at random of each available carrier wave according to comparative result, and selects at random according to the access probability of determining at random.
20. method as claimed in claim 19 is characterized in that, described terminal is determined the parameter information of each available carrier wave in the system according to the following step:
Described terminal is determined the parameter information of each available carrier wave in the system from the broadcast that the base station sends; Or
Described terminal sends to the base station and obtains message, and from the parameter information from definite each available carrier wave the feedback message of base station.
21., it is characterized in that this method also comprises as claim 18,19 or 20 described methods:
When described terminal is carried out at random access failure by the available carrier wave of determining, select an available carrier wave that is used for inserting again in other available carrier wave;
The available carrier wave that is used for inserting again that described terminal is selected inserts at random.
22., it is characterized in that described terminal is selected also to comprise before the available carrier wave at random as claim 18,19 or 20 described methods from the described available carrier wave of determining:
Described terminal determines to receive the indication information that indicating terminal adopts random fashion to insert at random that is used for from the base station.
23. the system that multicarrier system inserts at random comprises base station and terminal, it is characterized in that, described terminal comprises:
The second carrier wave determination module is used for determining the available carrier wave of system;
Select module, be used for selecting an available carrier wave at random from the described available carrier wave of determining;
Second access module at random is used for inserting at random by the available carrier wave of selecting.
24. system as claimed in claim 23 is characterized in that, described selection module is used for:
According to random probability distribution, from the described available carrier wave of determining, select an available carrier wave at random; Or
The parameter information of each available carrier wave of determining is compared, determine the access probability at random of each available carrier wave, and select at random according to the access probability of determining at random according to comparative result.
25. system as claimed in claim 24 is characterized in that, described base station is used for:
Transmission comprises the broadcast of the parameter information of each available carrier wave;
Described selection module also is used for:
From the described broadcast of receiving, determine the parameter information of each available carrier wave in the system;
Or
Described base station is used for:
Receive from described terminal obtain message after, send the feedback message of the parameter information that comprises each available carrier wave to described terminal;
Described selection module also is used for:
Send the described message of obtaining, and from the described feedback message of receiving, determine the parameter information of each available carrier wave.
26., it is characterized in that described base station also is used for as claim 23,24 or 25 described systems:
Be used for the indication information that indicating terminal adopts random fashion to insert at random to described terminal transmission;
Described terminal also comprises:
Second trigger module: be used for after receiving described indication information, trigger described selection module and select an available carrier wave.
27. a terminal is characterized in that, this terminal comprises:
The second carrier wave determination module is used for determining the available carrier wave of system;
Select module, be used for selecting an available carrier wave at random from the described available carrier wave of determining;
Second access module at random is used for inserting at random by the available carrier wave of selecting.
28. terminal as claimed in claim 27 is characterized in that, described selection module is used for:
According to random probability distribution, from the described available carrier wave of determining, select an available carrier wave at random; Or
The parameter information of each available carrier wave of determining is compared, determine the access probability at random of each available carrier wave, and select at random according to the access probability of determining at random according to comparative result.
29. terminal as claimed in claim 27 is characterized in that, described selection module also is used for:
Described second when access module is carried out at random access failure by the available carrier wave of determining at random, select an available carrier wave that is used for inserting again in other available carrier wave;
Described second at random access module be used for:
Insert at random by an available carrier wave that is used for inserting again of selecting.
30., it is characterized in that described terminal also comprises as claim 27,28 or 29 described terminals:
Second trigger module is used for triggering described selection module and selecting an available carrier wave receiving from after being used for indicating terminal and adopting the indication information that random fashion inserts at random of base station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910078018A CN101801103A (en) | 2009-02-09 | 2009-02-09 | Method, system and device of random access |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910078018A CN101801103A (en) | 2009-02-09 | 2009-02-09 | Method, system and device of random access |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101801103A true CN101801103A (en) | 2010-08-11 |
Family
ID=42596516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910078018A Pending CN101801103A (en) | 2009-02-09 | 2009-02-09 | Method, system and device of random access |
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| Country | Link |
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| CN (1) | CN101801103A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012109904A1 (en) * | 2011-02-15 | 2012-08-23 | 中兴通讯股份有限公司 | Method, system and device for determining priority of component carrier |
| CN102740402A (en) * | 2011-04-02 | 2012-10-17 | 华为技术有限公司 | Method and terminal device of uplink access |
| CN104168630A (en) * | 2014-08-14 | 2014-11-26 | 中国联合网络通信集团有限公司 | Target cell determining method and device |
| CN107820729A (en) * | 2017-07-14 | 2018-03-20 | 深圳前海达闼云端智能科技有限公司 | The method, apparatus and terminal and storage medium of connection reconstruction |
| WO2019029696A1 (en) * | 2017-08-11 | 2019-02-14 | 华为技术有限公司 | Signal transmission method and receiving method and apparatus |
| CN109845168A (en) * | 2017-06-15 | 2019-06-04 | 华为技术有限公司 | Accidental access method and relevant apparatus |
| CN110492954A (en) * | 2019-07-01 | 2019-11-22 | 中国联合网络通信集团有限公司 | A kind of base station control method, first base station and the second base station |
| WO2021004272A1 (en) * | 2019-07-10 | 2021-01-14 | 维沃移动通信有限公司 | Random access method and device |
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- 2009-02-09 CN CN200910078018A patent/CN101801103A/en active Pending
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| JP2013517748A (en) * | 2011-02-15 | 2013-05-16 | ゼットティーイー コーポレイション | Method, system and apparatus for determining priority level of component carrier |
| RU2520384C2 (en) * | 2011-02-15 | 2014-06-27 | ЗетТиИ Корпорейшн | Method, system and apparatus for determining priority of component carrier |
| WO2012109904A1 (en) * | 2011-02-15 | 2012-08-23 | 中兴通讯股份有限公司 | Method, system and device for determining priority of component carrier |
| CN102740402A (en) * | 2011-04-02 | 2012-10-17 | 华为技术有限公司 | Method and terminal device of uplink access |
| CN102740402B (en) * | 2011-04-02 | 2015-12-02 | 华为技术有限公司 | The method of multi-upstream access and terminal equipment |
| CN104168630A (en) * | 2014-08-14 | 2014-11-26 | 中国联合网络通信集团有限公司 | Target cell determining method and device |
| CN109845168A (en) * | 2017-06-15 | 2019-06-04 | 华为技术有限公司 | Accidental access method and relevant apparatus |
| CN109845168B (en) * | 2017-06-15 | 2021-06-22 | 华为技术有限公司 | Random access method and related device |
| US11006474B2 (en) | 2017-07-14 | 2021-05-11 | Cloudminds (Shanghai) Robotics Co., Ltd. | Method for reestablishing connection using a RAR in a wireless communication network |
| CN107820729B (en) * | 2017-07-14 | 2021-05-28 | 达闼机器人有限公司 | Connection reestablishment method and device, terminal and storage medium |
| CN107820729A (en) * | 2017-07-14 | 2018-03-20 | 深圳前海达闼云端智能科技有限公司 | The method, apparatus and terminal and storage medium of connection reconstruction |
| CN109392048A (en) * | 2017-08-11 | 2019-02-26 | 华为技术有限公司 | Signal sending method, receiving method and device |
| WO2019029696A1 (en) * | 2017-08-11 | 2019-02-14 | 华为技术有限公司 | Signal transmission method and receiving method and apparatus |
| CN110492954A (en) * | 2019-07-01 | 2019-11-22 | 中国联合网络通信集团有限公司 | A kind of base station control method, first base station and the second base station |
| CN110492954B (en) * | 2019-07-01 | 2021-07-27 | 中国联合网络通信集团有限公司 | Base station control method, first base station and second base station |
| WO2021004272A1 (en) * | 2019-07-10 | 2021-01-14 | 维沃移动通信有限公司 | Random access method and device |
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