CN105307284A - Random access method and user equipment - Google Patents
Random access method and user equipment Download PDFInfo
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- CN105307284A CN105307284A CN201510867725.5A CN201510867725A CN105307284A CN 105307284 A CN105307284 A CN 105307284A CN 201510867725 A CN201510867725 A CN 201510867725A CN 105307284 A CN105307284 A CN 105307284A
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 230000004044 response Effects 0.000 claims abstract description 82
- 238000004891 communication Methods 0.000 claims abstract description 15
- 238000012163 sequencing technique Methods 0.000 claims description 77
- 230000008685 targeting Effects 0.000 claims description 77
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 description 14
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000000977 initiatory effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 101100274486 Mus musculus Cited2 gene Proteins 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
Abstract
Embodiments of the invention disclose a random access method and user equipment. The method comprises steps of sending a preamble to a base station; receiving a response message for the preamble returned from the base station, wherein the response message comprises a random access preamble and time adjustment amount; determining, according to the random access preamble, whether current user equipment is at an edge position of a cell corresponding to the base station; and if yes, adjusting a position sending the preamble according to the time adjustment amount, then retransmitting the preamble, so as to establish a communication connection with the base station via random access. Through adoption of the method, the UE at the edge of the cell corresponding to the base station can realize uplink synchronization with the base station so as to succeed in random access.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of accidental access method and subscriber equipment.
Background technology
At Long Term Evolution (LongTermEvolution, referred to as " LTE ") in network, subscriber equipment (UserEquipment, referred to as " UE ") need by Stochastic accessing (RandomAccess in some scenarios, referred to as " RA ") establish a communications link with base station, such as when switching as UE, UE can initiate Stochastic accessing in Target cell, trigger random access procedure (RandomAccessProcedure), connect with base station cell and obtain uplink synchronous.Only obtain uplink synchronous, UE just can carry out uplink.This random access procedure comprises: UE sends preamble to base station, base station returns to UE and carries random access leader sequence number (RandomAccessPreambleIdentifier, referred to as " RAPID ") response message, this RAPID preamble index (preambleindex) that to be base station obtain when detecting the preamble that UE sends.If UE finds that the index that this value uses when sending preamble with oneself is identical, then think that this RAR sends to oneself.
But, for the UE being in edge, base station cell, base station is when receiving the preamble that cell edge UE sends, and because propagation delay time is comparatively large, the RAPID causing base station to calculate according to this preamble is inaccurate, reality is preambleindex-1, make base station to after UE returns the response message carrying the RAPID that this calculates, the index used when UE detects the preamble of this RAPID and transmission is inconsistent, then can abandon this RAR, cannot uplink synchronous be completed, cause random access failure.
Summary of the invention
Embodiments provide a kind of accidental access method and subscriber equipment, uplink synchronous cannot be obtained with base station for solving edge, base station cell UE and cause the problem of random access failure.
The embodiment of the invention discloses a kind of accidental access method, comprising:
Targeting sequencing is sent to base station;
Receive the response message that described base station returns for targeting sequencing, described response message comprises random access leader sequence number and time adjustment amount;
Judge whether current user equipment is in the marginal position of respective cell, described base station according to described random access leader sequence number;
If be in marginal position, then resend described targeting sequencing, to be established a communications link by Stochastic accessing and described base station after the position sending targeting sequencing being adjusted according to described time adjustment amount.
Optionally, describedly judge whether current user equipment is in the marginal position of respective cell, described base station, comprising according to described random access leader sequence number:
The preamble index that described random access leader sequence number is corresponding with the described targeting sequencing sent compares, and whether the difference detecting described preamble index and described random access leader sequence number is within the scope of pre-set interval;
If be within the scope of described pre-set interval, then determine that current user equipment is in the marginal position of respective cell, described base station, and using described time adjustment amount as the time adjustment amount resend required for described targeting sequencing.
Optionally, describedly determine the marginal position that current user equipment is in respective cell, described base station, comprising:
Repeat described to base station transmission targeting sequencing, receive the response message that described base station returns for targeting sequencing, and a described random access leader sequence number preamble index corresponding with the described targeting sequencing sent is compared, whether the difference detecting described preamble index and described random access leader sequence number is in the step within the scope of pre-set interval, and detecting that described difference counts when being within the scope of described pre-set interval;
Whether the count value detecting described counting corresponding reaches preset number threshold value;
If reach described preset number threshold value, then determine that current user equipment is in the marginal position of respective cell, described base station.
Optionally, whether the difference of the described preamble index of described detection and described random access leader sequence number is within the scope of pre-set interval, comprising:
Whether the difference detecting described preamble index and described random access leader sequence number is one;
If so, then determine that the difference of described preamble index and described random access leader sequence number is within the scope of pre-set interval.
Optionally, described preset number threshold value is no more than the Stochastic accessing sending times into described cell configuration.
Correspondingly, the embodiment of the invention also discloses a kind of subscriber equipment, comprising:
Sending module, for sending targeting sequencing to base station;
Receiver module, for receiving the response message that described base station returns for targeting sequencing, described response message comprises random access leader sequence number and time adjustment amount;
According to described random access leader sequence number, judge module, for judging whether current user equipment is in the marginal position of respective cell, described base station;
Described sending module, also in the judged result of described judge module be described subscriber equipment be in marginal position time, described targeting sequencing is resend, to be established a communications link by Stochastic accessing and described base station after the position sending targeting sequencing being adjusted according to described time adjustment amount.
Optionally, described judge module comprises:
Detecting unit, compares for the preamble index that described random access leader sequence number is corresponding with the described targeting sequencing sent, and whether the difference detecting described preamble index and described random access leader sequence number is within the scope of pre-set interval;
Position determination unit, for when described detecting unit detects that described difference is within the scope of described pre-set interval, determine that current user equipment is in the marginal position of respective cell, described base station, and using described time adjustment amount as the time adjustment amount resend required for described targeting sequencing.
Optionally, described position determination unit specifically for:
Detect that the difference of described preamble index and described random access leader sequence number counts when being within the scope of pre-set interval at described detecting unit;
Whether the count value detecting described counting corresponding reaches preset number threshold value;
If reach described preset number threshold value, then determine that current user equipment is in the marginal position of respective cell, described base station.
Optionally, described detecting unit specifically for:
The preamble index that described random access leader sequence number is corresponding with the described targeting sequencing sent compares, and whether the difference detecting described preamble index and described random access leader sequence number is one;
If so, then determine that the difference of described preamble index and described random access leader sequence number is within the scope of pre-set interval.
Optionally, described preset number threshold value is no more than the Stochastic accessing sending times into described cell configuration.
Implement the embodiment of the present invention, there is following beneficial effect:
In embodiments of the present invention, UE is by sending targeting sequencing to base station, and the random access leader sequence number in the response message returned by base stations detected judges whether current UE is in edge, base station cell, when determining that UE is in edge, base station cell, using the response message that this response message needs as oneself, and resend this targeting sequencing after the position sending targeting sequencing being adjusted according to the time adjustment amount in this response message, to complete the uplink synchronous between UE and base station, thus communicate with base station further by Stochastic accessing.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of network architecture schematic diagram that the embodiment of the present invention provides;
Fig. 2 is the schematic flow sheet of a kind of accidental access method that the embodiment of the present invention provides;
Fig. 3 is the schematic flow sheet of the another kind of accidental access method that the embodiment of the present invention provides;
Fig. 4 is the structural representation of a kind of subscriber equipment that the embodiment of the present invention provides;
Fig. 5 is the structural representation of the another kind of subscriber equipment that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Should understand, the technical scheme of the embodiment of the present invention can be applied particularly to Long Term Evolution (LongTermEvolution, referred to as " LTE ") in system, along with the development of the communication technology, the described method of the embodiment of the present invention also may be used for future network, as 5G network, do not limit herein.
In embodiments of the present invention, subscriber equipment (UserEquipment, referred to as " UE ") also can be referred to as terminal (Terminal), travelling carriage (MobileStation, referred to as " MS ") or mobile terminal (MobileTerminal) etc.It can through wireless access network (as RAN, RadioAccessNetwork) communicate with one or more core net, subscriber equipment can be mobile terminal, as mobile phone (or being called " honeycomb " phone) and the computer with mobile terminal, they and wireless access network swap data.Base station can be the evolved base station in LTE, as eNB or e-NodeB (evolutionalNodeB), or the base station in future network, the embodiment of the present invention does not limit.
Below the application scenarios of the embodiment of the present invention is introduced.Refer to Fig. 1, Fig. 1 is a kind of network architecture schematic diagram that the embodiment of the present invention provides.Concrete, as shown in Figure 1, this communication system comprises base station and at least one UE (shown in figure 3 UE), communicates between this base station and UE by LTE network or other networks.In some scenarios, as set up wireless connections, wireless heterogeneous networks (RadioResourceControl when UE initially accesses, RRC) connection reconstruction, be uply in " asynchronous " state or in order under the scenes such as positioning UE, need the random access procedure triggering UE.
The embodiment of the invention discloses a kind of accidental access method and subscriber equipment, effectively can solve edge, base station cell UE cannot obtain uplink synchronous with base station and cause the problem of random access failure.Below describe in detail respectively.
Refer to Fig. 2, Fig. 2 is the schematic flow sheet of a kind of accidental access method that the embodiment of the present invention provides.Concrete, the described method of the embodiment of the present invention can be applied particularly in above-mentioned subscriber equipment, and as shown in Figure 2, the described accidental access method of the embodiment of the present invention can comprise the following steps:
101, targeting sequencing is sent to base station.
In specific embodiment, when determining the Stochastic accessing initiating random access procedure needing to trigger UE, UE need determine the targeting sequencing preamble needing to send.Such as, generally, there are 64 available preamble respective cell, each base station (hereinafter referred to as community), and UE can select one of them as the preamble needing to send, or the preamble specifying these needs to send by base station.After determining the preamble that these needs send, UE can determine that time-frequency domain resources sends this preamble to base station, has a random access request so that signals base is current.
102, receive the response message that described base station returns for targeting sequencing, described response message comprises random access leader sequence number and time adjustment amount.
In specific embodiment, base station is when receiving the preamble that UE sends, owing to not knowing UE can send preamble on which running time-frequency resource, can detect on each preamble running time-frequency resource and receive preamble thus, determine that random access leader sequence is number as RAPID according to the position of the preamble received, and return the response message comprising the RAPID that this is determined to UE.In addition, time adjustment amount TA (TimeAdvance) corresponding with the preamble that this receives can also be comprised in this response message.UE receives the response message that base station returns.Wherein, this RAPID is the preamble index preambleindex that base station obtains when detecting preamble, this response message can be specially accidental access response (RandomAccessResponse, referred to as " RAR "), the Msg2 of corresponding random access procedure.
103, judge whether current user equipment is in the marginal position of respective cell, described base station according to described random access leader sequence number.
If 104 are in marginal position, then resend described targeting sequencing, to be established a communications link by Stochastic accessing and described base station after the position sending targeting sequencing being adjusted according to described time adjustment amount.
In specific embodiment, UE is when receiving the response message that base station returns, and the value of the RAPID that can comprise according to this response message judges whether this UE is in cell edge.Because the propagation delay time be between the UE of cell edge and base station is larger, thus, the preambleindex that the value of the RAPID that base station is determined when receiving the preamble that UE sends often sends this preamble corresponding with this UE does not mate, and both exist certain difference.Thus, described judge whether current user equipment is in the marginal position of respective cell, described base station according to described random access leader sequence number time, the preamble index that described random access leader sequence number is corresponding with the described targeting sequencing sent can compare by UE, and whether the difference detecting described preamble index and described random access leader sequence number is within the scope of pre-set interval; If be within the scope of described pre-set interval, then determine that current user equipment is in the marginal position of respective cell, described base station, and using described time adjustment amount as the time adjustment amount resend required for described targeting sequencing.
Concrete, UE can obtain the RAPID value in the response message that this base station returns, and by its with to determine and preambleindex corresponding to the preamble sent carries out matching ratio pair, if do not mate, and the difference of this preambleindex and RAPID is when being within the scope of pre-set interval, can determine that this UE is in cell edge.Such as, pre-set interval can be set to [0.5,1], thus, when the difference of this preambleindex and RAPID is 1, can determine that UE is in cell edge.
Further, for guaranteeing the accuracy being in the position of the UE of cell edge determined, when detecting that the difference of the random access leader sequence RAPID in the preamble index that preamble that UE sends is corresponding and described response message is within the scope of pre-set interval, also can repeat described to base station transmission targeting sequencing, receive the response message that described base station returns for targeting sequencing, and a described random access leader sequence number preamble index corresponding with the described targeting sequencing sent is compared, whether the difference detecting described preamble index and described random access leader sequence number is in the step within the scope of pre-set interval, and detecting that described difference counts when being within the scope of described pre-set interval, whether the count value detecting described counting corresponding reaches preset number threshold value, if reach described preset number threshold value, then determine that current user equipment is in the marginal position of respective cell, described base station.Wherein, this preset number threshold value can pre-configuredly obtain.That is, if UE in the random access procedure, the difference of the RAPID that continuous several times (being not less than preset number threshold value) sends in the response message that the preambleindex of its correspondence of preamble and base station return all is within the scope of pre-set interval, when such as this difference is 1, just UE is defined as being in cell edge position, determine that this response message issues oneself, the time adjustment amount can taken thus in this response message carries out the adjustment of the position sending this preamble, to realize uplink synchronous, thus complete this random access procedure, and communicate with this base station.
In embodiments of the present invention, UE is by sending targeting sequencing to base station, and the random access leader sequence number in the response message returned by base stations detected judges whether current UE is in edge, base station cell, when determining that UE is in edge, base station cell, using the response message that this response message needs as oneself, and resend this targeting sequencing after the position sending targeting sequencing being adjusted according to the time adjustment amount in this response message, to complete the uplink synchronous between UE and base station, thus communicate with base station further by Stochastic accessing.
Further, refer to Fig. 3, Fig. 3 is the schematic flow sheet of the another kind of accidental access method that the embodiment of the present invention provides.Concrete, as shown in Figure 3, the described accidental access method of the embodiment of the present invention can comprise the following steps:
201, targeting sequencing is sent to base station.
202, receive the response message that described base station returns for targeting sequencing, described response message comprises random access leader sequence number and time adjustment amount.
Concrete, under the scene needing initiating random access procedure, UE selects a preamble and sends from current available targeting sequencing preamble, or the preamble specifying these needs to send by base station.After determining the preamble that these needs send, UE can select to send the time-frequency domain resources of this preamble further and send this preamble based on this time-frequency domain resources to base station, has a random access request so that signals base is current.Base station is detected and is received preamble on each preamble running time-frequency resource, random access leader sequence RAPID is determined in time-frequency domain position according to the preamble received, this RAPID is base station preamble index preambleindex of obtaining when detecting preamble, and returns the response message of the time adjustment amount TA comprising this RAPID and determine according to the propagation delay time of the preamble of this reception to UE.UE receives this response message, obtains the RAPID in this response message and time adjustment amount TA.
Whether the difference 203, detecting preamble index corresponding to described targeting sequencing sent and described random access leader sequence number is one; If so, then step 204 is performed.
204: count.
205: whether the count value detecting described counting corresponding reaches preset number threshold value; If not, then step 201 is performed; If so, then step 206 is performed.
206, determine that current user equipment is in the marginal position of respective cell, described base station.
In specific embodiment, because the propagation delay time be between the UE of cell edge and base station is larger, the preambleindex that the value of the RAPID that base station is determined when receiving the preamble that UE sends often sends this preamble corresponding with this UE does not mate, there is certain difference in both, generally, the RAPID:RAPID=preambleindex-1 that determines of this base station.Thus, the preambleindex that the preamble that RAPID and UE in this response message can send by UE is corresponding compares, whether the difference detecting this RAPID and this preambleindex is 1, and count when difference is 1, and again initiate this random access procedure, if difference is not 1, when namely this difference is not within the scope of this pre-set interval, then can not process.Concrete, when the difference of RAPID and this preambleindex is 1, re-execute step 201-204, preamble is sent to base station, and receive the response message comprising RAPID and TA value that base station returns, if UE detects that the difference of RAPID and this preambleindex is 1, then count value adds 1, and again re-execute step 201-204, by that analogy.Until count value reaches preset number threshold value, namely the RAPID of continuous several times random access procedure all little than preambleindex 1 time, then can determine that this UE is in cell edge, determine that this response message issues oneself.By this continuous several times random access procedure, then ensure that the accuracy of the UE positional information determined.
It should be noted that, this preset number threshold value is no more than the Stochastic accessing sending times preambleTransMax into described cell configuration.Optionally, this preset number threshold value can be set according to this Stochastic accessing sending times, this preset number threshold value is set to the number of times more a little bit smaller a little than this preambleTransMax, such as this preset number threshold value is set to (preambleTransMax-2).
207, described targeting sequencing is resend, to be established a communications link by Stochastic accessing and described base station after the position sending targeting sequencing being adjusted according to described time adjustment amount.
Further, after determining that UE is in cell edge position, this response message can be sent to the response message of oneself as base station, thus UE sends the position of this preamble by the time adjustment amount adjustment in this response message, to realize uplink synchronous, complete random access procedure and communicate with this base station.
In embodiments of the present invention, UE is by sending preamble to base station, and be whether 1 judge whether current UE is in edge, base station cell by the difference that detects the RAPID in response message that preambleindex corresponding to this preamble and base station return, specifically can the difference of RAPID in continuous several times detects the response message that this preambleindex and base station return when being 1, when determining that this UE is in edge, base station cell, thus the response message that this response message needs as oneself by UE, and resend this preamble after the position sending preamble being adjusted according to the TA value in this response message, to realize the uplink synchronous between UE and base station, complete Stochastic accessing to communicate with base station.
Refer to Fig. 4, Fig. 4 is the structural representation of a kind of subscriber equipment that the embodiment of the present invention provides.Concrete, as shown in Figure 4, the described subscriber equipment of the embodiment of the present invention comprises sending module 11, receiver module 12 and judge module 13.Wherein,
Described sending module 11, for sending targeting sequencing to base station.
Concrete, under the scene needing initiating random access procedure, UE selects a preamble and sends from available targeting sequencing preamble, or the preamble specifying these needs to send by base station.After determining this preamble that will send, sending module 11 can be selected to send the time-frequency domain resources of this preamble further and send this preamble to base station, has a random access request so that signals base is current.And notify the response message that receiver module 12 preparation reception base station returns.
Described receiver module 12, for receiving the response message that described base station returns for targeting sequencing, described response message comprises random access leader sequence number and time adjustment amount.
In specific embodiment, base station is when receiving the preamble that UE sends, owing to not knowing UE can send preamble on which running time-frequency resource, can detect on each preamble running time-frequency resource and receive preamble thus, determine that random access leader sequence is number as RAPID according to the position of the preamble received, and return the response message comprising the RAPID that this is determined to UE.In addition, time adjustment amount TA (TimeAdvance) corresponding with the preamble that this receives can also be comprised in this response message.UE receives this response message by receiver module 12.Wherein, this RAPID is the preamble index preambleindex that base station obtains when detecting preamble, and this response message can be specially the Msg2 of random access procedure.
According to described random access leader sequence number, described judge module 13, for judging whether current user equipment is in the marginal position of respective cell, described base station.
Described sending module 11, for in the judged result of described judge module 13 be described subscriber equipment be in marginal position time, described targeting sequencing is resend, to be established a communications link by Stochastic accessing and described base station after the position sending targeting sequencing being adjusted according to described time adjustment amount.
In specific embodiment, when receiver module 12 receives the response message that base station returns, the value of the RAPID that judge module 13 can comprise according to this response message judges whether this UE is in cell edge.Further, when this judge module 13 judges that obtaining this UE is in marginal position, sending module 11 resends this preamble after can adjusting the position sending preamble according to the time adjustment amount TA in this response message, complete the uplink synchronous between UE and base station, to be communicated with described base station by Stochastic accessing.
Optionally, in embodiments of the present invention, described judge module 13 specifically can comprise (not shown):
Detecting unit 131, compares for the preamble index that described random access leader sequence number is corresponding with the described targeting sequencing sent, and whether the difference detecting described preamble index and described random access leader sequence number is within the scope of pre-set interval;
Position determination unit 132, for when described detecting unit 131 detects that described difference is within the scope of described pre-set interval, determine that current user equipment is in the marginal position of respective cell, described base station, and using described time adjustment amount as the time adjustment amount resend required for described targeting sequencing.
Further alternative, described position determination unit 132 can be specifically for:
Detect that the difference of described preamble index and described random access leader sequence number counts when being within the scope of pre-set interval at described detecting unit;
Whether the count value detecting described counting corresponding reaches preset number threshold value;
If reach described preset number threshold value, then determine that current user equipment is in the marginal position of respective cell, described base station.
It should be noted that, this preset number threshold value is no more than the Stochastic accessing sending times preambleTransMax into described cell configuration.Optionally, this preset number threshold value can be set according to this Stochastic accessing sending times, this preset number threshold value is set to the number of times more a little bit smaller a little than this preambleTransMax, such as this preset number threshold value is set to (preambleTransMax-2).
Further alternative, in embodiments of the present invention, described detecting unit 131 can be specifically for:
The preamble index that described random access leader sequence number is corresponding with the described targeting sequencing sent compares, and whether the difference detecting described preamble index and described random access leader sequence number is one;
If so, then determine that the difference of described preamble index and described random access leader sequence number is within the scope of pre-set interval.
Further, because the propagation delay time be between the UE of cell edge and base station is larger, the preambleindex that the value of the RAPID that base station is determined when receiving the preamble that UE sends often sends this preamble corresponding with this UE does not mate, there is certain difference in both, generally, the preambleindex that the preamble that sends than UE of the RAPID that determines of this base station is corresponding is little by 1.Thus, for guaranteeing the accuracy being in the position of the UE of cell edge determined, when the difference of the RAPID that detecting unit 131 detects in the preamble index preambleindex that preamble that UE sends is corresponding and this response message is 1, also again send preamble to base station by sending module 11, the response message that described base station returns for preamble is received by receiver module 12, and by detecting unit 131, the preambleindex that the RAPID in this response message is corresponding with the preamble of transmission is compared, whether the difference detecting this preambleindex and this RAPID is 1, if 1 sends preamble to base station again by sending module 11, the response message that described base station returns for preamble is received by receiver module 12, and by detecting unit 131, the preambleindex that the RAPID in this response message is corresponding with the described preamble of transmission is compared, whether the difference detecting this preambleindex and this RAPID is 1, by that analogy.And the number of times i.e. number of repetition of this random access procedure being 1 by this difference of position determination unit 132 counts, when the count value of this counting correspondence reaches preset number threshold value, can determine that current user equipment is in the marginal position of respective cell, described base station.That is, if UE in the random access procedure, the difference of the RAPID that continuous several times (being not less than preset number threshold value) sends in the response message that the preambleindex of its correspondence of preamble and base station return is 1, when being namely within the scope of pre-set interval, just UE is defined as being in cell edge position, determines that this response message issues oneself.The time adjustment amount can taken thus in this response message carries out the adjustment of the position sending this preamble, to realize uplink synchronous, thus completes this random access procedure, and communicates with this base station.
In embodiments of the present invention, UE is by sending targeting sequencing to base station, and the random access leader sequence number in the response message returned by base stations detected judges whether current UE is in edge, base station cell, when determining that UE is in edge, base station cell, using the response message that this response message needs as oneself, and resend this targeting sequencing after the position sending targeting sequencing being adjusted according to the time adjustment amount in this response message, to complete the uplink synchronous between UE and base station, thus communicate with base station further by Stochastic accessing.
Further, refer to Fig. 5, Fig. 5 is the structural representation of the another kind of subscriber equipment that the embodiment of the present invention provides.Concrete, as shown in Figure 5, the subscriber equipment of the embodiment of the present invention comprises: receiver 300, reflector 400, memory 200 and processor 100, described memory 200 can be high-speed RAM memory, also can be non-labile memory (non-volatilememory), such as at least one magnetic disc store.Corresponding application program etc. is stored as in a kind of memory 200 of computer-readable storage medium.Data cube computation can be carried out by bus between described receiver 300, reflector 400, memory 200 and processor 100, also can data cube computation by other means.Connect with bus in the present embodiment and be described.
Wherein, described processor 100 performs following steps for calling the program code stored in memory 200:
Targeting sequencing is sent to base station by described reflector 400;
Receive by described receiver 300 response message that described base station returns for targeting sequencing, described response message comprises random access leader sequence number and time adjustment amount;
Judge whether current user equipment is in the marginal position of respective cell, described base station according to described random access leader sequence number;
If be in marginal position, then resend described targeting sequencing by described reflector 400, to be established a communications link by Stochastic accessing and described base station after the position sending targeting sequencing being adjusted according to described time adjustment amount.
Optionally, described processor 100 performs and describedly judges whether current user equipment is in the marginal position of respective cell, described base station, specifically performs following steps according to described random access leader sequence number calling the program code stored in memory 200:
The preamble index that described random access leader sequence number is corresponding with the described targeting sequencing sent compares, and whether the difference detecting described preamble index and described random access leader sequence number is within the scope of pre-set interval;
If be within the scope of described pre-set interval, then determine that current user equipment is in the marginal position of respective cell, described base station, and using described time adjustment amount as the time adjustment amount resend required for described targeting sequencing.
Further alternative, described processor 100 performs and describedly determines the marginal position that current user equipment is in respective cell, described base station calling the program code stored in memory 200, specifically performs following steps:
Targeting sequencing is sent by described reflector 400 to base station described in repeating, the response message that described base station returns for targeting sequencing is received by described receiver 300, and a described random access leader sequence number preamble index corresponding with the described targeting sequencing sent is compared, whether the difference detecting described preamble index and described random access leader sequence number is in the step within the scope of pre-set interval, and detecting that described difference counts when being within the scope of described pre-set interval;
Whether the count value detecting described counting corresponding reaches preset number threshold value;
If reach described preset number threshold value, then determine that current user equipment is in the marginal position of respective cell, described base station.
Further alternative, whether the difference that described processor 100 is calling the program code stored in memory 200 and perform the described preamble index of described detection and described random access leader sequence number is within the scope of pre-set interval, specifically performs following steps:
Whether the difference detecting described preamble index and described random access leader sequence number is one;
If so, then determine that the difference of described preamble index and described random access leader sequence number is within the scope of pre-set interval.
Optionally, described preset number threshold value is no more than the Stochastic accessing sending times into described cell configuration.
In embodiments of the present invention, UE is by sending targeting sequencing to base station, and the random access leader sequence number in the response message returned by base stations detected judges whether current UE is in edge, base station cell, when determining that UE is in edge, base station cell, using the response message that this response message is wanted as oneself, and resend this targeting sequencing after the position sending targeting sequencing being adjusted according to the time adjustment amount in this response message, to complete the uplink synchronous between UE and base station, thus communicate with base station further by Stochastic accessing.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiment provided by the present invention, should be understood that, disclosed apparatus and method, can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical, machinery or other form.
Described this or can may not be as the unit that separating component illustrates and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form that hardware also can be adopted to add SFU software functional unit realizes.
The above-mentioned integrated unit realized with the form of SFU software functional unit, can be stored in a computer read/write memory medium.Above-mentioned SFU software functional unit is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) or processor (processor) perform the part steps of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (Read-OnlyMemory, ROM), random access memory (RandomAccessMemory, RAM), magnetic disc or CD etc. various can be program code stored medium.
Those skilled in the art can be well understood to, for convenience and simplicity of description, only be illustrated with the division of above-mentioned each functional module, in practical application, can distribute as required and by above-mentioned functions and be completed by different functional modules, internal structure by device is divided into different functional modules, to complete all or part of function described above.The specific works process of the device of foregoing description, with reference to the corresponding process in preceding method embodiment, can not repeat them here.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. an accidental access method, is characterized in that, comprising:
Targeting sequencing is sent to base station;
Receive the response message that described base station returns for targeting sequencing, described response message comprises random access leader sequence number and time adjustment amount;
Judge whether current user equipment is in the marginal position of respective cell, described base station according to described random access leader sequence number;
If be in marginal position, then resend described targeting sequencing, to be established a communications link by Stochastic accessing and described base station after the position sending targeting sequencing being adjusted according to described time adjustment amount.
2. method according to claim 1, is characterized in that, describedly judges whether current user equipment is in the marginal position of respective cell, described base station, comprising according to described random access leader sequence number:
The preamble index that described random access leader sequence number is corresponding with the described targeting sequencing sent compares, and whether the difference detecting described preamble index and described random access leader sequence number is within the scope of pre-set interval;
If be within the scope of described pre-set interval, then determine that current user equipment is in the marginal position of respective cell, described base station, and using described time adjustment amount as the time adjustment amount resend required for described targeting sequencing.
3. method according to claim 2, is characterized in that, describedly determines the marginal position that current user equipment is in respective cell, described base station, comprising:
Repeat described to base station transmission targeting sequencing, receive the response message that described base station returns for targeting sequencing, and a described random access leader sequence number preamble index corresponding with the described targeting sequencing sent is compared, whether the difference detecting described preamble index and described random access leader sequence number is in the step within the scope of pre-set interval, and detecting that described difference counts when being within the scope of described pre-set interval;
Whether the count value detecting described counting corresponding reaches preset number threshold value;
If reach described preset number threshold value, then determine that current user equipment is in the marginal position of respective cell, described base station.
4. according to the method in claim 2 or 3, it is characterized in that, whether the difference of the described preamble index of described detection and described random access leader sequence number is within the scope of pre-set interval, comprising:
Whether the difference detecting described preamble index and described random access leader sequence number is one;
If so, then determine that the difference of described preamble index and described random access leader sequence number is within the scope of pre-set interval.
5. method according to claim 3, is characterized in that, described preset number threshold value is no more than the Stochastic accessing sending times into described cell configuration.
6. a subscriber equipment, is characterized in that, comprising:
Sending module, for sending targeting sequencing to base station;
Receiver module, for receiving the response message that described base station returns for targeting sequencing, described response message comprises random access leader sequence number and time adjustment amount;
According to described random access leader sequence number, judge module, for judging whether current user equipment is in the marginal position of respective cell, described base station;
Described sending module, also in the judged result of described judge module be described subscriber equipment be in marginal position time, described targeting sequencing is resend, to be established a communications link by Stochastic accessing and described base station after the position sending targeting sequencing being adjusted according to described time adjustment amount.
7. subscriber equipment according to claim 6, is characterized in that, described judge module comprises:
Detecting unit, compares for the preamble index that described random access leader sequence number is corresponding with the described targeting sequencing sent, and whether the difference detecting described preamble index and described random access leader sequence number is within the scope of pre-set interval;
Position determination unit, for when described detecting unit detects that described difference is within the scope of described pre-set interval, determine that current user equipment is in the marginal position of respective cell, described base station, and using described time adjustment amount as the time adjustment amount resend required for described targeting sequencing.
8. subscriber equipment according to claim 7, is characterized in that, described position determination unit specifically for:
Detect that the difference of described preamble index and described random access leader sequence number counts when being within the scope of pre-set interval at described detecting unit;
Whether the count value detecting described counting corresponding reaches preset number threshold value;
If reach described preset number threshold value, then determine that current user equipment is in the marginal position of respective cell, described base station.
9. the subscriber equipment according to claim 7 or 8, is characterized in that, described detecting unit specifically for:
The preamble index that described random access leader sequence number is corresponding with the described targeting sequencing sent compares, and whether the difference detecting described preamble index and described random access leader sequence number is one;
If so, then determine that the difference of described preamble index and described random access leader sequence number is within the scope of pre-set interval.
10. subscriber equipment according to claim 8, is characterized in that, described preset number threshold value is no more than the Stochastic accessing sending times into described cell configuration.
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