CN107359973A - A kind of method and device of transmission node selection - Google Patents

A kind of method and device of transmission node selection Download PDF

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Publication number
CN107359973A
CN107359973A CN201610302300.4A CN201610302300A CN107359973A CN 107359973 A CN107359973 A CN 107359973A CN 201610302300 A CN201610302300 A CN 201610302300A CN 107359973 A CN107359973 A CN 107359973A
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China
Prior art keywords
rsrp
transmission node
resource
control parameter
message
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CN201610302300.4A
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CN107359973B (en
Inventor
李剑
郝鹏
张峻峰
鲁照华
薛妍
晏潇
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/002—Transmission of channel access control information
    • 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

Disclosed herein is a kind of transmission node system of selection, including：UE covers RSRP measurements resource according to n and obtains n RSRP measurement result；According to one or more RSRP measurement results optimal in the n RSRP measurement results, and from the call access control parameter that transmission node obtains, at least one transmission node is selected from the multiple transmission node.There is disclosed herein corresponding transmission node selection device, the transmission node selection based on most high-amplitude wave beam is realized, suitable for 5G systems.

Description

A kind of method and device of transmission node selection
Technical field
The present invention relates to wireless communication field, espespecially a kind of method and device of transmission node selection.
Background technology
At present, the major demands of mobile communication are the development from mobile Internet, particularly intelligent UE's Development excites surging for mobile communication data business amount.Towards the year two thousand twenty and future, mobile Internet and Internet of things service is by as the main drive of Mobile Communication Development.In order to realize that the nothing of mobile device sews up Enter, it is necessary to strengthen mobile network's technology, therefore the third-generation mobile communication technology of next generation mobile communication system the 5th (5rd Generation, 5G) turns into a hot issue in academia and industrial quarters instantly.Mono- weight of 5G The key technology wanted is to use high band, solves instantly increasingly rare spectrum issue, so as to access Bigger bandwidth realizes the lifting of capacity.But high frequency channel it is intrinsic Free propagation loss it is big, easily By oxygen absorption, being declined by rain influences the features such as big, has had a strong impact on the covering performance of high frequency communication system. In order to improve coverage, high-frequency communication generally use wave beam forming (Beamforming) technology improves Antenna gain, so as to ensure the covering performance of high-frequency communication.After wave beam forming, transmitting terminal can incite somebody to action Emitted energy is concentrated on the direction of some fixation, and energy in the other direction is smaller or does not have. Covered that is, being realized with form of beams, each wave beam has the directionality of itself, can only cover one Determine the UE on direction, base station, which needs to launch multiple wave beams, could realize and cover all around.5G systems may Different beam directions is sent by configuring different antenna ports, UE is surveyed based on different antennae port Amount feedback, so as to select optimal served beams.
Due to the discreteness of UE distributions, same transmission node is not relative to different UE optimal beam With, different transmission nodes are also different relative to same UE optimal beam, and UE is before access The different beams for needing to measure under different transmission nodes may thereby determine that service transmission node and optimal ripple Beam, in addition UE be likely to be at mobile status, phase may be caused by being moved to another place from a place With switching between wave beam in transmission node or cause switching problem between transmission node, it can be seen that transmission node Selection, gravity treatment and transmission node switching all exist with wave beam to be contacted.In existing LTE system, reference signal Receiving power (RSRP, Reference signal received power) is reference signal (RE, Reference Signal linear average of the power distribution on Measurement bandwidth on), while be a value filtered for a long time. RSRP provides the standard of the signal intensity of a measurement specific cell, and RSRP measurement results can be used for Carry out candidate transport node ranking, the signal intensity of candidate transport node be transmission node selection, gravity treatment and Switch the important parameter determined.At present defined in LTE protocol two kinds of RSRP measurements reference signal： Cell special reference (CRS, Cell Specific Reference Signal) or channel condition information Reference signal (CSI-RS, Channel State Information Reference Signal), wherein being based on CSI-RS RSRP measurements are passed in coordinate multipoint (CoMP, Coordinated Multiple Point) What transferring technology introduced when discussing is used for CoMP cell RSRP measurements, according in TS36.214V13.0.0 Description, the RSRP measurements based on CRS are based on measuring on CRS R0, if UE can have Effect detects second antenna, then can also be with carrying out RSRP's on CRS R1 in addition to R0 Measurement；RSRP measurements based on CSI-RS are based on measuring on CSI-RS R15.To sum up, LTE It is that RSRP measurements are carried out by specified reference signal port.
Begged in Rel-13 vertical beam figuration/full dimension multiple-input and multiple-output (EB/FD-MIMO) subject under discussion By the CSI-RS with precoding is determined, maximum is supported 8 antenna ports, introduced with precoding CSI-RS main purposes are to increase CSI-RS coverage, while reduce interference, are not used Measured in RSRP.
In addition, in existing LTE system, channel condition information (CSI, Channel State Information) It is the channel condition information that UE reports eNodeB, (CQI, Channel Quality is indicated by channel quality Indicator), pre-coding matrix index (PMI, Precoding Matrix Indicator), precoding class Type designator (PTI, Precoding Type Indicator) and order instruction (RI, Rank Indication) Composition, UE are believed by measuring the downlink reference signal (CRS or CSI-RS) received to obtain CSI Breath, and base station is reported, so that base station is that UE selects more reliable MCS, less punching and selection More preferable running time-frequency resource, CSI can be measured based on multiple ports, but CSI is not used to transmission section Point selection.
Due to same cell is sent in 5G systems multiple wave beams relative to some UE in each wave beam The signal intensity received on direction is different, so existing RSRP measurements are applied to 5G systems, there will be survey Measure the problem of inaccurate.Therefore, it is necessary to which a kind of new transmission node selection scheme, can be based on most high-amplitude wave Beam is transmitted node selection, with suitable for 5G systems.
The content of the invention
In order to solve the above-mentioned technical problem, the invention provides a kind of transmission node system of selection and device, It can be selected based on most high-amplitude wave Shu Shixian transmission nodes.
In order to reach the object of the invention, the invention provides a kind of method of transmission node selection, including：
UE is based on n set RSRP measurements resource and obtains n RSRP measurement result；
UE according to one or more RSRP measurement results optimal in the n RSRP measurement results with And from the call access control parameter that transmission node obtains, it is transmitted node selection；
Wherein, n is the integer more than or equal to 2.
Wherein, the n set RSRP measurements resource corresponds to n antenna port；And/or the n sets RSRP Resource uses identical sequence create-rule；And/or the n set RSRP measurements resource belongs to same Base station/transmission node of base station/transmission node or same type.
Wherein, the call access control parameter carries the broadcast message that the UE is sent in the transmission node Or in accidental access response message.
Wherein, the call access control parameter includes one or more of：Minimum receives level requirements, most Small credit rating demand, minimum receive level requirements biasing, the biasing of minimum quality levels demand, and power is mended Repay value, UE maximum transmission power grades, UE maximum radio frequencies power output and temporary bias information.
Wherein, the n sets RSRP measures resource by one or more transmission node periodicity configuration concurrencies Give the UE；Or the n set RSRP measurements resource is matched somebody with somebody by one or more of transmission nodes Put and notified by accidental access response message to the UE.
Wherein, if UE obtains call access control parameter and institute after uplink random access request message is sent State n set RSRP measurement resources, then it is described to be transmitted node selection, be specially：According to different transmission Optimal RSRP measurement results, call access control parameter and the response uplink random access of node please Situation about asking, select transmission node；If UE has been obtained before uplink random access request message is sent Obtain call access control parameter and n set RSRP measurement resources, then it is described to be transmitted node selection, tool Body is：According to the optimal RSRP measurement results and call access control parameter of different transmission nodes, selection passes Defeated node；Or
If UE before uplink random access request message is sent, has obtained call access control parameter and described N set RSRP measurement resources, then it is described to be transmitted node selection, be specially：First saved according to different transmission The optimal RSRP measurement results and call access control parameter of point, transmission node is selected, to the transmission of selection Node sends the uplink random access request message and then according to the transmission node to described up The response condition of random access request message, re-start the selection of transmission node.
Wherein, methods described also includes：UE sends the uplink random access request message to transmission node.
Wherein, after transmission node is selected, methods described also includes：UE is sent out to the transmission node of selection Message three (message3) is sent, the message3 carries optimal one or more RSRP and surveyed Measure one or more sets measurement resource informations corresponding to result.
Wherein, the measurement resource information is reference signal resource configuration index and/or port numbers.
Wherein, described to be transmitted after node selection, methods described also includes：
UE obtains beam alignmetn resource from the transmission node of selection, and the beam alignmetn resource passes through message four (message4) indicate or indicated by accidental access response message；
Beam alignmetn is completed based on the beam alignmetn resource, and the wave beam is fed back to the transmission node The Beam resources information selected after calibration.
Wherein, the RSRP that optimal one or more RSRP results refer to by high level filtering measures knot Fruit.
A kind of device for selecting transmission node, including measurement module and selecting module；Wherein,
Measurement module, for obtaining n RSRP measurement result based on n set RSRP measurements resource；
Selecting module, for according to one or more RSRP optimal in the n RSRP measurement results Measurement result, and from the call access control parameter that transmission node obtains, it is transmitted node selection；
Wherein, n is the integer more than or equal to 2.
Wherein, the n set RSRP measurements resource corresponds to n antenna port；And/or the n sets RSRP Resource uses identical sequence create-rule；And/or the n set RSRP measurements resource belongs to same The cell of cell or same type.
Wherein, in addition to：First acquisition module, for being sent to UE's from one or more transmission nodes The call access control parameter is obtained in broadcast message or accidental access response message.
Wherein, first acquisition module, for receiving the periodically configuration of one or more transmission nodes simultaneously The n set RSRP measurement resources of transmission；Or for receiving one or more of transmission node configurations And the n notified by accidental access response message covers RSRP and measures resource.
Wherein, described device also includes：Sending module, for send uplink random access request message to Transmission node；
The selecting module, is specifically used for, and uplink random access request message is sent in the sending module When obtaining call access control parameter and n set RSRP measurement resources afterwards, according to different transmission nodes Optimal RSRP measurement results, call access control parameter and the feelings for responding the uplink random access request Condition, select transmission node；
Call access control parameter and n sets RSRP have been obtained before uplink random access request message is sent When measuring resource, then according to the optimal RSRP measurement results and call access control parameter of different transmission nodes, Select transmission node；Or
Call access control parameter and n sets RSRP have been obtained before uplink random access request message is sent When measuring resource, first according to the optimal RSRP measurement results and call access control parameter of different transmission nodes Transmission node is selected, sending the uplink random access to the transmission node of selection in the sending module please Message and then the response condition according to the transmission node to the uplink random access request message are asked, Re-start the selection of transmission node.
Wherein, the sending module, it is additionally operable to send message to the transmission node that the selecting module selects Three (message3), the message3 carry optimal one or more RSRP measurement results One or more sets corresponding measurement resource informations.
Wherein, described device also includes：Second acquisition module and beam alignmetn module；
Second acquisition module, the transmission node for being selected from the selecting module obtain beam alignmetn resource, The beam alignmetn resource is indicated by message four (message4) or referred to by accidental access response message Show；
Beam alignmetn module, for completing beam alignmetn based on the beam alignmetn resource, and to the biography The Beam resources information selected after beam alignmetn described in defeated node feeding back.
Transmission node system of selection provided in an embodiment of the present invention and device, more set RSRP can be based on and surveyed The multiple RSRP of resource measurement are measured, and are selected in multiple transmission nodes according to multiple RSRP results optimal Transmission node, it is achieved thereby that based on most high-amplitude wave beam transmission node selection, suitable for 5G systems.
Other features and advantages of the present invention will be illustrated in the following description, also, partly from froming the perspective of Become apparent in bright book, or understood by implementing the present invention.The purpose of the present invention is excellent with other Point can be realized and obtained by specifically noted structure in specification, claims and accompanying drawing .
Brief description of the drawings
Accompanying drawing is used for providing further understanding technical solution of the present invention, and one of constitution instruction Point, it is used to explain technical scheme together with embodiments herein, does not form to the present invention The limitation of technical scheme.
Fig. 1 is 5G system beam selection schematic diagrames；
Fig. 2 is the schematic flow sheet of the transmission node system of selection of the embodiment of the present invention；
Fig. 3 is the transmission node system of selection flow chart of the embodiment of the present invention one；
Fig. 4 is the transmission node system of selection flow chart of the embodiment of the present invention two；
Fig. 5 is the transmission node system of selection flow chart of the embodiment of the present invention three；
Fig. 6 is the transmission node system of selection flow chart of the embodiment of the present invention four；
Fig. 7 is the transmission node system of selection flow chart of the embodiment of the present invention five；
Fig. 8 is the transmission node system of selection flow chart of the embodiment of the present invention six；
Fig. 9 is the transmission node system of selection flow chart of the embodiment of the present invention seven；
Figure 10 is the transmission node system of selection flow chart of the embodiment of the present invention eight；
Figure 11 is the transmission node system of selection flow chart of the embodiment of the present invention nine；
Figure 12 is the transmission node system of selection flow chart of the embodiment of the present invention ten；
Figure 13 is a kind of measurement resource information schematic diagram；
Figure 14 is that the embodiment of the present invention covers the schematic flow sheet that RSRP measures resource feedback more；
Figure 15 is the composition structural representation of transmission node selection device of the embodiment of the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with accompanying drawing Embodiments of the invention are described in detail.It should be noted that in the case where not conflicting, this Shen Please in embodiment and embodiment in feature can mutually be combined.
Can be in the computer of such as one group computer executable instructions the flow of accompanying drawing illustrates the step of Performed in system.Also, although logical order is shown in flow charts, in some cases, Can be with the step shown or described by being performed different from order herein.
As shown in Fig. 2 the embodiment of the present invention provides a kind of system of selection of transmission node, this method is main Comprise the following steps：
Step 201：UE covers RSRP measurements resource according to n and obtains n RSRP measurement result；
Wherein, n is the integer more than or equal to 2.
Step 202：UE is according to one or more RSRP optimal in the n RSRP measurement results Measurement result, and from the call access control parameter that transmission node obtains, it is transmitted node selection
Wherein, methods described can be used for cell/transmission node gravity treatment and cell/transmission node handoff procedure.
In step 201, UE is based on n set RSRP measurements resource and obtains n RSRP measurement result, Wherein：The n sets RSRP measures resource by one or more of transmission node periodicity configuration concurrencies Give the UE；Or the n set RSRP measurements resource is matched somebody with somebody by one or more of transmission nodes Put and notified by accidental access response message to the UE.
Wherein, the n set RSRP measurements resource corresponds to n antenna port；And/or the n sets RSRP Resource uses identical sequence create-rule；And/or the n set RSRP measurements resource belongs to same Cell/transmission node of cell/transmission node or same type.
In step 202, the call access control parameter includes following at least one：Minimum receives grade and needed Ask, minimum quality levels demand, it is minimum receive level requirements biasing, the biasing of minimum quality levels demand, Power compensating value, UE maximum transmission powers grade, UE maximum radio frequencies power output, temporary bias information. In general, the call access control parameter carries the broadcast message that the UE is sent in the transmission node Or in accidental access response message.
Wherein, methods described can also include：UE sends uplink random at least one transmission node Access request message and/or message three (message3).In fact, the transmission node that UE is finally used is Respond one or several transmission nodes of UE uplink random access request.
Specifically, step 203 is realized by the following two kinds mode：Please if 1) send uplink random access Ask message to obtain call access control parameter and n set RSRP measurement results afterwards, then it is described to be transmitted Node selects, and is specially：Joined according to the optimal RSRP measurement results of each transmission node, call access control Number and the situation for responding the uplink random access request, select transmission node；If 2) on sending Before row random access request message, call access control parameter and n set RSRP measurement results have been obtained, It is then described to be transmitted node selection, be specially：Measured according to the optimal RSRP of different transmission nodes As a result with call access control parameter, transmission node is selected；If 3) send uplink random access request message it Before, obtained call access control parameter and n set RSRP measurement results, then it is described to be transmitted node Selection is specially：The first optimal RSRP measurement results and call access control parameter according to different transmission nodes, Select transmission node, to the transmission node of selection send the uplink random access request message and then Response condition according to the transmission node to the uplink random access request message, re-starts transmission The selection of node.
Here, the message3 carries optimal one or more RSRP measurement results pair simultaneously One or more sets RSRP measurement resource informations answered.The RSRP measurements resource information is specially with reference to letter Number resource distribution index and/or port numbers.
Wherein, after step 203, methods described can also include：UE is from the transmission node selected Beam alignmetn resource is obtained, the beam alignmetn resource is indicated or passed through by message four (message4) Accidental access response message indicates；Beam alignmetn is completed based on the beam alignmetn resource, and to the biography The Beam resources information selected after beam alignmetn described in defeated node feeding back.
Wherein, after step 203, methods described can also include：After transmission node is selected, Optimal one or more RSRP measurement results can also be reported to choosing by UE by RRC signaling At least one transmission node selected.
Wherein, optimal one or more RSRP measurement results are the RSRP by high level filtering Measurement result.Specifically, the high-rise filtering can be smoothed according to following algorithm： Fn=(1-a) Fn-1+a·Mn, wherein, FnRefer to this smooth result, Fn-1Refer to last smooth result, MnReferring to the measurement result that this physical layer reports, a refers to smoothing factor, when smooth for the first time, F0=M1。 Here, before the filtering by high level, the RSRP measurement results may also pass through physical layer filtering.
Embodiment one
The method that the present embodiment provides a kind of selection of transmission node, as shown in figure 3, idiographic flow include with Lower step：
Step S301, base station 1 send synchronizing signal/broadcast channel/reference signal, while it is more to configure instruction Cover RSRP measurement resources；Base station 2 sends synchronizing signal/broadcast channel/reference signal, while configures instruction More set RSRP measurement resources；
Wherein, more set RSRP measurements resources correspond to n antenna port；And/or the n sets RSRP Resource uses identical sequence create-rule；And/or the n set RSRP measurements resource belongs to same Cell/transmission node of cell or same type.
Wherein, the reference signal measures for RSRP.
Step S302, UE are based respectively on synchronizing signal discovery base station 1 and base station 2, and foundation is synchronous, simultaneously Broadcast the message, obtain call access control parameter；It is multiple based on more set RSRP measurement resource measurements RSRP, base station choosing is carried out according to the optimal RSRP measurement results and call access control parameter of different base station Select；
Wherein, carried in broadcast message call access control parameter, RACH RACHs configuration and with Machine accesses relevant parameter.Wherein, the call access control parameter can include following at least one：Minimum connects Receive level requirements, minimum quality levels demand, minimum reception level requirements bias, minimum quality levels need Ask biasing, power compensating value, UE maximum transmission powers grade, UE maximum radio frequencies power output and face When offset information.
Step S303, UE send uplink random access request message；
Specifically, the base station that UE selects into step 302 sends uplink random access request message.If Base station 1 is have selected in step S302, then the RACH that UE is carried in being broadcast the message according to base station 1 is configured Uplink random access request is initiated to base station 1 with Stochastic accessing relevant parameter, that is, performs step S303；Such as Fruit have selected base station 2 in step S302, then the RACH that UE is carried in being broadcast the message according to base station 2 matches somebody with somebody Put and initiate uplink random access request to base station 2 with Stochastic accessing relevant parameter, that is, perform step S303 '.
Embodiment two
The present embodiment provides a kind of method of transmission node selection, as shown in figure 4, its flow is including following Step：
Step S401, transmission node 1 (TP1) send synchronizing signal/broadcast channel/reference signal, simultaneously The more set RSRP measurements resources of configuration instruction；Transmission node 2 (TP2) transmission synchronizing signal/broadcast channel/ Reference signal, while configure the more set RSRP measurements resources of instruction；
Wherein, the corresponding more set antenna ports of more set RSRP measurement resources；And/or more set RSRP Resource uses identical sequence create-rule；And/or more set RSRP measurements resources belong to same Cell/transmission node of cell/transmission node or same type.
Wherein, the reference signal measures for RSRP.
Step S402, UE are based respectively on synchronizing signal discovery TP1 and TP2, and foundation is synchronous, obtains simultaneously It must broadcast the message, obtain call access control parameter；Based on the multiple RSRP of more set RSRP measurement resource measurements；
Wherein, carried in broadcast message call access control parameter, RACH RACHs configuration and with Machine accesses relevant parameter.Wherein, the call access control parameter can include following at least one：Minimum connects Receive level requirements, minimum quality levels demand, minimum reception level requirements bias, minimum quality levels need Ask biasing, power compensating value, UE maximum transmission powers grade, UE maximum radio frequencies power output and face When offset information.
Step S403, UE send uplink random access request message；
Step S404, TP1 and TP2 respond UE uplink random access request, send Stochastic accessing and ring Answer message；
Wherein, accidental access response message carries message3 configurations and relevant parameter；Wherein, Message3 is configured and relevant parameter can include Grant message (authorization messages), TP ID (transmission sections Point identity), Tmp C-RNTI (interim-Cell Radio Network Temporary Identifier/Identity, Cell-RNTI) etc..
Step S405, UE according to the optimal RSRP measurement results of different nodes, call access control parameter with And the situation of response uplink random access request carries out TP selections；
Step S406, UE send message3 (MSG3) message to the TP of selection；
Wherein, if having selected TP1, message3 Grants of the UE based on TP1 in step S405 Message3 message is sent, notice TP1 is its service and performs the step 406 between TP1 and UE； If have selected TP2 in step S405, message3 Grants of the UE based on TP2 sends message3 Message, notice TP2 are its service and perform the S406' between TP2 and UE.
Wherein, message3 is scrambled based on Tmp C-RNTI and TP ID.
Embodiment three
The present embodiment provides a kind of method of transmission node selection, as shown in figure 5, flow includes following step Suddenly：
Step S501, TP1 send synchronizing signal/broadcast channel/reference signal, while configure the more sets of instruction RSRP measures resource；TP2 sends synchronizing signal/broadcast channel/reference signal, while configures the more sets of instruction RSRP measures resource；
Wherein, more set RSRP measurements resources correspond to multiple antenna ports；And/or more set RSRP Resource uses identical sequence create-rule；And/or more set RSRP measurements resources belong to same Cell/transmission node of cell/transmission node or same type.
Wherein, the reference signal measures for RSRP.
Step S502, UE are based respectively on synchronizing signal discovery TP1 and TP2, and foundation is synchronous, obtains simultaneously It must broadcast the message, and based on the multiple RSRP of more set RSRP measurement resource measurements；
Wherein, broadcast message carries the configuration of RACH RACHs and Stochastic accessing relevant parameter.
Step S503, UE send uplink random access request message；
Step S504, TP1 and TP2 respond the uplink random access request information and sending Stochastic accessing Response message is to UE；
Wherein, accidental access response message carries call access control parameter；Wherein, the call access control ginseng Number can include following at least one：Minimum receives level requirements, minimum quality levels demand, minimum and connect Receive level requirements biasing, the biasing of minimum quality levels demand, power compensating value, UE maximum transmission powers etc. Level, UE maximum radio frequencies power output and temporary bias information；
Wherein, accidental access response message carries message3 configurations and relevant parameter；Wherein, Message3 is configured and relevant parameter can include Grant message, TP ID, Tmp C-RNTI etc..
Step S505, UE according to the optimal RSRP measurement results of different nodes, call access control parameter with And the situation of response uplink random access request carries out TP selections；
Step S506, UE send message3 (MSG3) message to the TP of selection；
Wherein, if having selected TP1, message3 Grants of the UE based on TP1 in step S505 Message3 message is sent, notice TP1 is its service and performs the step 506 between TP1 and UE； If have selected TP2 in step S505, message3 Grants of the UE based on TP2 sends message3 Message, notice TP2 are its service and perform the S506' between TP2 and UE.
Wherein, message3 is scrambled based on Tmp C-RNTI and TP ID.
Example IV
The present embodiment provides a kind of method of transmission node selection, as shown in fig. 6, flow includes following step Suddenly：
Step S601, TP1-TPn send synchronizing signal and Payload (payload) in a broadcast manner Carrying signal；
Wherein, call access control parameter and access configuration message are carried in payload carrying signals；Wherein, The call access control parameter can include following at least one：Minimum receives level requirements, minimum mass etc. Level demand, minimum reception level requirements biasing, the biasing of minimum quality levels demand, power compensating value, UE Maximum transmission power grade, UE maximum radio frequencies power output and temporary bias information.
Wherein, the configuration of RACH RACHs and Stochastic accessing are carried in the access configuration message Relevant parameter.
The synchronizing signal of step S602, UE based on TP1-TPn finds TP, establishes synchronously, obtains simultaneously Call access control parameter and access configuration message；
Wherein, n is more than or equal to when 1, n is equal to 1 and illustrates that user can only have found a TP.
Step S603, UE send uplink random access request message；
Part TP responds the uplink random access request in step S604, TP1-TPn, is sent to UE Accidental access response message and reference signal configure the more set RSRP measurements resources of instruction simultaneously；
Wherein, the corresponding more set antenna ports of more set RSRP measurement resources；And/or the n sets RSRP Resource uses identical sequence create-rule；And/or the n set RSRP measurements resource belongs to same Cell/transmission node of cell/transmission node or same type.
Step S605, UE are obtained multiple RSRP and surveyed based on more set RSRP measurement resource measurement RSRP Result is measured, according to different TP optimal RSRP measurement results, call access control parameter and response The situation of uplink random access request carries out TP selections；
Wherein, accidental access response message carries message3 configurations and relevant parameter；Wherein, Message3 is configured and relevant parameter can include Grant message, TP ID, Tmp C-RNTI etc..
Step S606, UE send message3 (MCG3) message to selected TP；
Wherein, if having selected TP1, message3 Grants of the UE based on TP1 in step S605 Message3 message is sent, notice TP1 is its service and performs the step 606 between TP1 and UE； If have selected TPn in step S605, message3 Grants of the UE based on TPn sends message3 Message, notice TPn are its service and perform the S606' between TPn and UE.
Wherein, message3 is scrambled based on Tmp C-RNTI.
Embodiment five
The present embodiment provides a kind of method of transmission node selection, as shown in fig. 7, flow includes following step Suddenly：
Step S701, TP1-TP2 send synchronizing signal and broadcast channel in a broadcast manner；
The synchronizing signal of step S702, UE based on TP1-TP2 finds TP, establishes synchronously, obtains simultaneously Broadcast message；
Wherein, RACH RACHs configuration ginseng related to Stochastic accessing is carried in broadcast message Number.
Step S703, UE send uplink random access request message；
Step S704, TP1-TP2 respond the uplink random access request message, are sent to UE random Response message and reference signal are accessed, while configures the more set RSRP measurements resources of instruction；
Wherein, more set RSRP measurements resources correspond to multiple antenna ports；And/or more set RSRP Resource uses identical sequence create-rule；And/or more set RSRP measurements resources belong to same Cell/transmission node of cell/transmission node or same type.
Wherein, call access control parameter is carried in accidental access response message.Wherein, call access control parameter can With including at least one in following：Minimum receives level requirements, minimum quality levels demand, minimum and connect Receive level requirements biasing, the biasing of minimum quality levels demand, power compensating value, UE maximum transmission powers Grade, UE maximum radio frequencies power output and temporary bias information.
Wherein, reference signal in the more set RSRP measurements resource instruction step S705 of the configuration instruction Send the resource informations such as time/frequency；
Step S705, TP1-TP2 send reference signal；
Wherein, the reference signal measures for RSRP.
More set RSRP that step S706, UE indicate according to transmission node measure resource measurement and covered more RSRP, according to different TP optimal RSRP measurement results, call access control parameter and response The situation of uplink random access request carries out TP selections；
Wherein, accidental access response message carries message3 configurations and relevant parameter；Here, Message3 is configured and relevant parameter can include Grant message, TP ID, Tmp C-RNTI etc.；
Step S707, UE send message3 (MSG3) message to the TP of selection, carry optimal RSRP Corresponding measurement resource information.
Wherein, if having selected TP1, message3 Grants of the UE based on TP1 in step S706 Message3 message is sent, notice TP1 is its service and performs the step 707 between TP1 and UE； If have selected TP2 in step S706, message3 Grants of the UE based on TP2 sends message3 Message, notice TP2 are its service and perform the S707' between TP2 and UE.
Wherein, message3 is scrambled based on Tmp C-RNTI and TP ID；
Wherein, measurement resource information refers to reference signal resource configuration index and/or port numbers.
Embodiment six
The present embodiment provides a kind of method of transmission node selection, as shown in figure 8, flow includes following step Suddenly：
Step S801, TP1-TP2 send synchronizing signal and broadcast channel in a broadcast manner；
The synchronizing signal of step S802, UE based on TP1-TP2 finds TP, establishes synchronously, obtains simultaneously Broadcast message；
Wherein, broadcast message carries the configuration of RACH RACHs and Stochastic accessing relevant parameter；
Step S803, UE send uplink random access request message；Step S804, TP1-TP2 response The uplink random access request message, accidental access response message is sent to UE, while configure instruction More set RSRP measurement resources；Wherein, more set RSRP measurements resources correspond to n antenna port； And/or the n sets RSRP resources use identical sequence create-rule；And/or the n sets RSRP Measurement resource belongs to same cell/transmission node or cell/transmission node of same type.
Wherein, call access control parameter is carried in accidental access response message；Wherein, the call access control Parameter can include following at least one：Minimum receives level requirements, minimum quality levels demand, minimum Receive level requirements biasing, the biasing of minimum quality levels demand, power compensating value, UE maximum transmitted work( Rate grade, UE maximum radio frequencies power output and temporary bias information.
Step S805, TP configuration sends reference signal；
Wherein, the reference signal measures for RSRP；
Step S806, UE are based on more set RSRP measurement resource measurement RSRP, according to different TP most Excellent RSRP measurement results, call access control parameter and the situation for responding the uplink random access request Carry out TP selections；
Wherein, accidental access response message carries message3 configurations and relevant parameter；Here, Message3 is configured and relevant parameter can include Grant message, TP ID, Tmp C-RNTI etc..
Step S807, UE send message3 (MCG3) message to the TP of selection, carry optimal Measurement resource information corresponding to RSRP；
Wherein, if having selected TP1, message3 Grants of the UE based on TP1 in step S806 Message3 message is sent, notifies the step of TP1 is between its serve future execution TP1 and UE 808-812；If it have selected TP2, message3 Grants of the UE based on TP2 in step S806 Message3 message is sent, notice TP2 is its service and the S808'- between subsequent execution TP2 and UE S812'。
Wherein, message3 is scrambled based on Tmp C-RNTI and TP ID.
Wherein, measurement resource information refers to reference signal resource configuration index and/or port numbers.
Step S808 or S808', TP send message4 (MCG4) message, while configure instruction ripple Beam calibrates resource；
Wherein, beam alignmetn refers in the configuration instruction instruction beam alignmetn resource instruction step S809 The resource informations such as the transmission time/frequency of signal；
S809, TP send wave beam calibration reference signal；
Step S810, UE is based on beam alignmetn resource and completes beam alignmetn, as the selection in Fig. 1 is optimal narrow Wave beam；
The Beam resources information selected after step S811, UE feedback beam alignmetn；
Wherein, Beam resources information refers to beam alignmetn resource distribution index and/or port numbers and/or precoding letter Breath.
Beam direction corresponding to the Beam resources information that step S812, TP are fed back based on the UE sends number According to.
Embodiment seven
The present embodiment provides a kind of method of transmission node selection, as shown in figure 9, flow includes following step Suddenly：
Step S901, base station 1 send synchronizing signal/broadcast channel/reference signal, while configure the more sets of instruction RSRP measures resource；Base station 2 sends synchronizing signal/broadcast channel/reference signal, while it is more to configure instruction Cover RSRP measurement resources；
Wherein, the corresponding more set antenna ports of more set RSRP measurement resources；And/or more set RSRP Resource uses identical sequence create-rule；And/or more set RSRP measurements resources belong to same Cell/transmission node of cell/transmission node or same type.
Wherein, the reference signal is used to cover RSRP measurements more；
Step S902, UE are based respectively on synchronizing signal discovery base station 1 and base station 2, and foundation is synchronous, simultaneously Broadcast the message, obtain call access control parameter；It is multiple based on more set RSRP measurement resource measurements RSRP, base station choosing is carried out according to the optimal RSRP measurement results and call access control parameter of different base station Select；
Wherein, broadcast message carries call access control parameter；Wherein, the call access control parameter can wrap Include following at least one：Minimum receives level requirements, minimum quality levels demand, the minimum grade that receives and needed Ask biasing, the biasing of minimum quality levels demand, power compensating value, UE maximum transmission powers grade, UE Maximum radio frequency power output and temporary bias information.
Wherein, RACH RACHs configuration ginseng related to Stochastic accessing is also carried in broadcast message Number.
Step S903, UE sends uplink random access request message, while feeds back corresponding to most strong RSRP Measure resource information；
Wherein, the measurement resource information refers to reference signal resource configuration index and/or port numbers.
Specifically, the base station that UE selects into step 902 sends uplink random access request message.If Base station 1 is have selected in step S902, then the RACH that UE is carried in being broadcast the message according to base station 1 is configured Uplink random access request is initiated to base station 1 with Stochastic accessing relevant parameter, that is, performs step S903- steps S908；If have selected base station 2 in step S902, what UE was carried in being broadcast the message according to base station 2 RACH is configured and Stochastic accessing relevant parameter initiates uplink random access request to base station 2, that is, performs step Rapid S903 '-step S908 '.
Step S904, base station in response UE uplink random access request, send accidental access response message With beam alignmetn reference signal, while configure instruction beam alignmetn resource concurrence give；
Step S905, UE are based on beam alignmetn resource completion beam alignmetn；
Step S906, UE send message3 to the base station for responding the uplink random access request (MCG3) message, while feed back the Beam resources information selected after beam alignmetn；
Wherein, the Beam resources information refers to beam alignmetn resource distribution index and/or port numbers and/or prelisted Code information.
Step S907, the base station send message4 (MSG4) message；
Step S908, beam direction corresponding to the Beam resources information that the base station is fed back based on the UE Send data.
Embodiment eight
The present embodiment provides a kind of method of transmission node selection, and as shown in Figure 10, flow includes following step Suddenly：
Step S1001, TP1 send synchronizing signal/broadcast channel/reference signal, while configure the more sets of instruction RSRP measurement resource concurrences are sent；TP2 sends synchronizing signal/broadcast channel/reference signal, while configuration refers to Show more set RSRP measurement resources；
Wherein, more set RSRP measurements resources correspond to multiple antenna ports；And/or more set RSRP Resource uses identical sequence create-rule；And/or more set RSRP measurements resources belong to same The cell of cell or same type.
Wherein, the reference signal measures for RSRP.
Step S1002, UE are based respectively on synchronizing signal discovery TP1 and TP2, and foundation is synchronous, obtains simultaneously It must broadcast the message, obtain call access control parameter；Based on the multiple RSRP of more set RSRP measurement resource measurements；
Wherein, broadcast message carries call access control parameter；Wherein, call access control parameter connects including minimum Receive level requirements, minimum quality levels demand, minimum reception level requirements bias, minimum quality levels need Ask biasing, power compensating value, UE maximum transmission powers grade, UE maximum radio frequencies power output, interim Offset information.
Wherein, broadcast message carries the configuration of RACH RACHs and Stochastic accessing relevant parameter.
Step S1003, UE send uplink random access request message；
Step S1004, TP1 and TP2 respond UE uplink random access request, send Stochastic accessing and ring Answer message；
Wherein, accidental access response message carries message3 configurations and relevant parameter；Here, Message3 is configured and relevant parameter can include Grant message, TP ID, Tmp C-RNTI etc..
Step S1005, UE are according to optimal RSRP measurement results, the call access control parameter of different nodes And the situation of response uplink random access request carries out TP selections；
Step S1006, UE send message3 (MSG3) message to selected TP, feed back simultaneously Measurement resource information corresponding to optimal RSRP；
Wherein, if having selected TP1, message3 Grants of the UE based on TP1 in step S1005 Message3 message is sent, notice TP1 is for its service and the step of between subsequent execution TP1 and UE 1007-1010；If it have selected TP2, message3 Grants of the UE based on TP2 in step S1005 Message3 message is sent, notice TP2 is its service and the S1007'- between subsequent execution TP2 and UE S1010'。
Wherein, message3 is scrambled based on Tmp C-RNTI and TP ID.
Wherein, the measurement resource information refers to reference signal resource configuration index and/or port numbers.
Step S1007, TP sends message4 (MSG4) signal, while configures instruction beam alignmetn Resource concurrence send beam alignmetn reference signal；
Step S1008, UE are based on beam alignmetn resource completion beam alignmetn；
The Beam resources information selected after step S109, UE feedback beam alignmetn；
Wherein, Beam resources information refers to beam alignmetn resource distribution index and/or port numbers and/or precoding Information.
Beam forming method corresponding to the Beam resources information that step S1011, TP are fed back based on the UE is sent Data.
Embodiment nine
The present embodiment provides a kind of method of transmission node selection, and as shown in figure 11, flow includes following step Suddenly：
Step S1101, TP1 send synchronizing signal/broadcast channel/reference signal, while configure the more sets of instruction RSRP measures resource；TP2 sends synchronizing signal/broadcast channel, while configures the more set RSRP measurements of instruction Resource；
Wherein, more set RSRP measurements resources correspond to multiple antenna ports；And/or more set RSRP Resource uses identical sequence create-rule；And/or more set RSRP measurements resources belong to same Cell/transmission node of cell/transmission node or same type.
Wherein, the reference signal measures for RSRP.
Step S1102, UE are based respectively on synchronizing signal discovery TP1 and TP2, and foundation is synchronous, obtains simultaneously It must broadcast the message；Based on the multiple RSRP of more set RSRP measurement resource measurements；
Wherein, broadcast message carries the configuration of RACH RACHs and Stochastic accessing relevant parameter.
Step S1103, UE send uplink random access request message；
Step S1104, TP1 and TP2 respond UE uplink random access request, send Stochastic accessing and ring Answer message；
Wherein, call access control parameter is carried in accidental access response message；The call access control parameter can With including following at least one：Minimum receives level requirements, minimum quality levels demand, minimum reception etc. The biasing of level demand, the biasing of minimum quality levels demand, power compensating value, UE maximum transmission powers etc. Level, UE maximum radio frequencies power output and temporary bias information；
Wherein, message3 configurations and relevant parameter are also carried in accidental access response message；Here, Message3 is configured and relevant parameter can include Grant message, TP ID, Tmp C-RNTI etc..
Step S1105, UE are according to optimal RSRP measurement results, the call access control parameter of different nodes And the situation of response uplink random access request carries out TP selections；
Step S1106, UE send message3 (MSG3) message to the TP of selection, while feed back most Measurement resource information corresponding to excellent RSRP；
Wherein, if having selected TP1, message3 Grants of the UE based on TP1 in step S1105 Message3 message is sent, notice TP1 is for its service and the step of between subsequent execution TP1 and UE S1106-1110；If it have selected TP2, message3s of the UE based on TP2 in step S1105 Grant sends message3 message, and notice TP2 is for its service and between subsequent execution TP2 and UE S1106'-S1110'。
Wherein, message3 is scrambled based on Tmp C-RNTI and TP ID；
Wherein, the measurement resource information refers to reference signal resource configuration index and/or port numbers；
Step S1107, TP transmission message4 (MSG4) and beam alignmetn reference signal, match somebody with somebody simultaneously Put instruction beam alignmetn resource；
Step S1108, UE are based on beam alignmetn resource completion beam alignmetn；
The Beam resources information selected after step S1109, UE feedback beam alignmetn；
Wherein, the Beam resources information refers to beam alignmetn resource distribution index and/or port numbers and/or prelisted Code information.
Beam direction corresponding to the Beam resources information that step S1110, TP are fed back based on the UE is sent Data.
Embodiment ten
The present embodiment provides a kind of method of transmission node selection, and as shown in figure 12, flow includes following step Suddenly：
Step S1201, TP1 and TP2 send synchronizing signal/broadcast channel in the form of broadcasting；
Step S1202, UE are based respectively on synchronizing signal discovery TP1 and TP2, and foundation is synchronous, obtains simultaneously It must broadcast the message, obtain call access control parameter；
Wherein, call access control parameter is carried in broadcast message signals；
Wherein, the call access control parameter can include following at least one：Minimum reception level requirements, Minimum quality levels demand, minimum reception level requirements biasing, the biasing of minimum quality levels demand, power Offset, UE maximum transmission powers grade, UE maximum radio frequencies power output and temporary bias letter Breath；
Wherein, broadcast message carries the configuration of RACH RACHs and Stochastic accessing relevant parameter；
Step S1203, UE send uplink random access request message；
Step S1204, TP1 and TP2 response UE uplink random access request simultaneously send Stochastic accessing sound Message is answered, while configures the more set RSRP measurements resource concurrences of instruction and send reference signal；
Wherein, more set RSRP measurements resources correspond to n antenna port；And/or the n sets RSRP Resource uses identical sequence create-rule；And/or the n set RSRP measurements resource belongs to same Cell/transmission node of cell/transmission node or same type.
Wherein, accidental access response message also carries message3 configurations and relevant parameter；Here, Message3 is configured and relevant parameter can include Grant message, TP ID, Tmp C-RNTI etc..
Step S1205, UE are multiple based on more set RSRP measurement resource measurements that transmission node indicates RSRP, UE are according to optimal RSRP measurement results, call access control parameter and the response of different nodes The situation of uplink random access request carries out TP selections；
Step S1206, UE send message3 message to selected TP, while feed back optimal RSRP Corresponding measurement resource information；
Wherein, if having selected TP1, message3 Grants of the UE based on TP1 in step S1205 Message3 message is sent, notice TP1 is for its service and the step of between subsequent execution TP1 and UE 1206-1210；If it have selected TP2, message3 Grants of the UE based on TP2 in step S1205 Message3 message is sent, notice TP2 is its service and the S1206'- between subsequent execution TP2 and UE S1210'。
Wherein, message3 is scrambled based on Tmp C-RNTI and TP ID；
Wherein, the measurement resource information refers to reference signal resource configuration index and/or port numbers.For example, As shown in figure 13, UE can be with feedback resources configuration index 1 or port numbers 1.
Step S1207, TP send message4 (MSG4), while configure instruction beam alignmetn resource And send the reference signal for beam alignmetn；
Step S1208, UE are based on beam alignmetn resource completion beam alignmetn；
Wherein, UE completes beam alignmetn based on the beam alignmetn resource that transmission node indicates；
The Beam resources information selected after step S1209, UE feedback beam alignmetn；
Wherein, the Beam resources information refers to beam alignmetn resource distribution index and/or port numbers and/or prelisted Code information.For example, as shown in figure 13, UE can be schemed with feedback resources configuration index 2 or port numbers 3 0/1/2/3 represents port numbers in 12.
Beam forming method corresponding to the Beam resources information that step S1210, TP are fed back based on the UE is sent Data.
Embodiment 11
The method that the present embodiment provides more set RSRP measurements resource feedbacks, as shown in figure 15, flow includes Following steps：
Step S1401, base station 1 send synchronizing signal/broadcast channel/reference signal, while it is more to configure instruction Cover RSRP measurement resources；Base station 2 sends synchronizing signal/broadcast channel/reference signal, while configures instruction More set RSRP measurement resources；
Wherein, more set RSRP measurements resources correspond to n antenna port；And/or the n sets RSRP Resource uses identical sequence create-rule；And/or the n set RSRP measurements resource belongs to same Cell/transmission node of cell or same type.
Wherein, the reference signal measures for RSRP；
Step S1402, UE are based respectively on synchronizing signal discovery base station 1 and base station 2, and foundation is synchronous, together When broadcast the message, obtain call access control parameter；It is more based on more set RSRP measurement resource measurements Individual RSRP, base station choosing is carried out according to the optimal RSRP measurement results and call access control parameter of different base station Select；
Wherein, carried in broadcast message call access control parameter, RACH RACHs configuration and with Machine accesses relevant parameter.Wherein, the call access control parameter can include following at least one：Minimum connects Receive level requirements, minimum quality levels demand, minimum reception level requirements bias, minimum quality levels need Ask biasing, power compensating value, UE maximum transmission powers grade, UE maximum radio frequencies power output and face When offset information.
Step S1403, UE feed back optimal one or more RSRP measurement results extremely by RRC signaling The transmission node of selection.
Wherein, optimal one or more RSRP measurement results are the RSRP by high level filtering Measurement result.Specifically, the high-rise filtering can be smoothed according to following algorithm： Fn=(1-a) Fn-1+a·Mn, wherein, FnRefer to this smooth result, Fn-1Refer to last smooth result, MnReferring to the measurement result that this physical layer reports, a refers to smoothing factor, when smooth for the first time, F0=M1。 Here, before the filtering by high level, the RSRP measurement results may also pass through physical layer filtering.
As shown in figure 15, the embodiment of the present invention additionally provides a kind of device for selecting transmission node, including： Including measurement module and selecting module；Wherein, measurement module, for based on n set RSRP measurement resources Obtain n RSRP measurement result；Selecting module, for according in the n RSRP measurement results most Excellent one or more RSRP measurement results, and from the call access control parameter that transmission node obtains, enter Row transmission node selects；Wherein, n is the integer more than or equal to 2.
Here, the n set RSRP measurements resource corresponds to n antenna port；And/or the n sets RSRP Resource uses identical sequence create-rule；And/or the n set RSRP measurements resource belongs to same The cell of cell or same type.
Wherein, described device also includes：First acquisition module, for being sent out from one or more transmission nodes Give UE broadcast message or accidental access response message in obtain the call access control parameter.Here, First acquisition module, it is additionally operable to receive the n that one or more transmission node periodicity configuration concurrencies are sent Cover RSRP measurement resources；Or it is additionally operable to receive one or more of transmission nodes and configures and pass through The n set RSRP measurement resources of accidental access response message notice.
Wherein, described device also includes：Sending module, for send uplink random access request message to Transmission node；The selecting module, is used for：Uplink random access request is sent in the sending module to disappear When call access control parameter and n set RSRP measurement resources are obtained after breath, according to different transmission nodes Optimal RSRP measurement results, call access control parameter and the response uplink random access request Situation, select transmission node；Call access control ginseng has been obtained before uplink random access request message is sent When number and n set RSRP measurement resources, then knot is measured according to the optimal RSRP of different transmission nodes Fruit and call access control parameter selection transmission node；Or before uplink random access request message is sent When having obtained call access control parameter and n set RSRP measurement resources, first according to different transmission nodes Optimal RSRP measurement results and call access control parameter selection transmission node, in the sending module to choosing The transmission node selected sends the uplink random access request message and then according to the transmission node pair The response condition of the uplink random access request message, re-starts the selection of transmission node.
Here, the sending module, it is additionally operable to send message to the transmission node that the selecting module selects Three (message3), the message3 carry optimal one or more RSRP measurement results One or more sets corresponding measurement resource informations.
Wherein, described device also includes：Second acquisition module and beam alignmetn module；Second acquisition module, Transmission node for being selected from the selecting module obtains beam alignmetn resource, the beam alignmetn resource Indicated by message four (message4) or indicated by accidental access response message；Beam alignmetn module, For completing beam alignmetn based on the beam alignmetn resource, and the wave beam is fed back to the transmission node The Beam resources information selected after calibration.
The device of selection transmission node provided in an embodiment of the present invention, available for execution above method embodiment Technical scheme, its implementing principle and technical effect is similar, and here is omitted.
Although disclosed herein embodiment as above, described content be only readily appreciate the present invention And the embodiment used, it is not limited to the present invention.Technology people in any art of the present invention Member, do not depart from disclosed herein spirit and scope on the premise of, can be in the form of implementation and thin Any modification and change, but the scope of patent protection of the present invention are carried out on section, still must be with appended right The scope that claim is defined is defined.

Claims (18)

  1. A kind of 1. method of transmission node selection, it is characterised in that including：
    User equipment (UE) is based on n set RSRP measurements resource and obtains n RSRP measurement result；
    UE according to one or more RSRP measurement results optimal in the n RSRP measurement results with And from the call access control parameter that transmission node obtains, it is transmitted node selection；
    Wherein, n is the integer more than or equal to 2.
  2. 2. according to the method for claim 1, it is characterised in that
    The n set RSRP measurements resource corresponds to n antenna port；And/or
    The n sets RSRP resources use identical sequence create-rule；And/or
    N set RSRP measurements resource belong to the base station of same base station/transmission node or same type/ Transmission node.
  3. 3. according to the method for claim 1, it is characterised in that the call access control parameter carries The transmission node is sent in broadcast message or the accidental access response message of the UE.
  4. 4. the method according to claim 1 or 3, it is characterised in that the call access control parameter Including one or more of：Minimum receives level requirements, minimum quality levels demand, minimum reception etc. Level demand biasing, the biasing of minimum quality levels demand, power compensating value, UE maximum transmission power grades, UE maximum radio frequencies power output and temporary bias information.
  5. 5. according to the method for claim 1, it is characterised in that
    The n set RSRP measurements resource gives institute by one or more transmission node periodicity configuration concurrencies State UE；Or
    The n set RSRP measurements resource is configured by one or more of transmission nodes and by connecing at random Enter response message to notify to the UE.
  6. 6. according to the method described in claim 1,3 or 4, it is characterised in that
    If UE obtains call access control parameter and the n after uplink random access request message is sent Cover RSRP measurement resources, then it is described to be transmitted node selection, be specially：According to different transmission nodes Optimal RSRP measurement results, call access control parameter and the response uplink random access request Situation, select transmission node；
    If UE before uplink random access request message is sent, has obtained call access control parameter and described N set RSRP measurement resources, then it is described to be transmitted node selection, be specially：According to different transmission nodes Optimal RSRP measurement results and call access control parameter, select transmission node；Or
    If UE before uplink random access request message is sent, has obtained call access control parameter and described N set RSRP measurement resources, then it is described to be transmitted node selection, be specially：First saved according to different transmission The optimal RSRP measurement results and call access control parameter of point, transmission node is selected, to the transmission of selection Node sends the uplink random access request message and then according to the transmission node to described up The response condition of random access request message, re-start the selection of transmission node.
  7. 7. according to the method for claim 1, it is characterised in that methods described also includes：UE to Transmission node sends the uplink random access request message.
  8. 8. according to the method for claim 6, it is characterised in that
    After transmission node is selected, methods described also includes：UE sends message to the transmission node of selection Three (message3), the message3 carry optimal one or more RSRP measurement results One or more sets corresponding measurement resource informations.
  9. 9. according to the method for claim 7, it is characterised in that the measurement resource information is reference Signal resource configuration index and/or port numbers.
  10. 10. according to the method for claim 6, it is characterised in that described to be transmitted node selection Afterwards, methods described also includes：
    UE obtains beam alignmetn resource from the transmission node of selection, and the beam alignmetn resource passes through message four (message4) indicate or indicated by accidental access response message；
    Beam alignmetn is completed based on the beam alignmetn resource, and the wave beam is fed back to the transmission node The Beam resources information selected after calibration.
  11. 11. the method according to claim 1 or 8, it is characterised in that described optimal one or Multiple RSRP results refer to the RSRP measurement results by high level filtering.
  12. 12. a kind of device for selecting transmission node, it is characterised in that including measurement module and selecting module； Wherein,
    Measurement module, for obtaining n RSRP measurement result based on n set RSRP measurements resource；
    Selecting module, for according to one or more RSRP optimal in the n RSRP measurement results Measurement result, and from the call access control parameter that transmission node obtains, it is transmitted node selection；
    Wherein, n is the integer more than or equal to 2.
  13. 13. device according to claim 12, it is characterised in that
    The n set RSRP measurements resource corresponds to n antenna port；And/or
    The n sets RSRP resources use identical sequence create-rule；And/or
    The n set RSRP measurements resource belongs to the cell of same cell or same type.
  14. 14. device according to claim 12, it is characterised in that also include：
    First acquisition module, for be sent to from one or more transmission nodes UE broadcast message or with The call access control parameter is obtained in machine access response message.
  15. 15. device according to claim 14, it is characterised in that
    First acquisition module, the n sent for receiving one or more transmission node periodicity configuration concurrencies Cover RSRP measurement resources；Or for receive the configuration of one or more of transmission nodes and by with The n set RSRP measurement resources of machine access response message notice.
  16. 16. device according to claim 12, it is characterised in that
    Described device also includes：Sending module, saved for sending uplink random access request message to transmission Point；
    The selecting module, is specifically used for, and uplink random access request message is sent in the sending module When obtaining call access control parameter and n set RSRP measurement resources afterwards, according to different transmission nodes Optimal RSRP measurement results, call access control parameter and the feelings for responding the uplink random access request Condition, select transmission node；
    Call access control parameter and n sets RSRP have been obtained before uplink random access request message is sent When measuring resource, then according to the optimal RSRP measurement results and call access control parameter of different transmission nodes, Select transmission node；Or
    Call access control parameter and n sets RSRP have been obtained before uplink random access request message is sent When measuring resource, first according to the optimal RSRP measurement results and call access control parameter of different transmission nodes Transmission node is selected, sending the uplink random access to the transmission node of selection in the sending module please Message and then the response condition according to the transmission node to the uplink random access request message are asked, Re-start the selection of transmission node.
  17. 17. device according to claim 16, it is characterised in that
    The sending module, it is additionally operable to send message three to the transmission node that the selecting module selects (message3), the message3 carries optimal one or more RSRP measurement results pair One or more sets measurement resource informations answered.
  18. 18. device according to claim 16, it is characterised in that
    Described device also includes：Second acquisition module and beam alignmetn module；
    Second acquisition module, the transmission node for being selected from the selecting module obtain beam alignmetn resource, The beam alignmetn resource is indicated by message four (message4) or referred to by accidental access response message Show；
    Beam alignmetn module, for completing beam alignmetn based on the beam alignmetn resource, and to the biography The Beam resources information selected after beam alignmetn described in defeated node feeding back.
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