CN104053247B - PRACH power estimation based on UpPCH power ramps - Google Patents
PRACH power estimation based on UpPCH power ramps Download PDFInfo
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Abstract
The present invention relates to the PRACH power estimations based on UpPCH power ramps.It is connected in particular to radio resource control (RRC) is established in TD-SCDMA system.First that foundation and the RRC connections of network can be executed is attempted.First attempts that the network for the transmission on uplink pilot channel (UpPCH) and Physical Random Access Channel (PRACH) can be utilized it is expected power level.If the first trial is unsuccessful, the second trial can be executed.Second attempts that the power level for the transmission on UpPCH and PRACH alternately determined can be utilized.Particularly, it can be based on the power level used during first attempts for the primary power level of the transmission on UpPCH during second attempts, also, it can be based on the power level for the transmission on UpPCH during second attempts for the power level of transmission on prach during second attempts.
Description
Technical field
This application involves wireless device, relate more specifically to be based on UpPCH power ramps (power by wireless device
Ramping) estimate the system and method for PRACH power.
Background technology
The use of wireless communication system rapidly increases.Moreover, wireless communication technique is from the communication of only voice
It is evolved to the transmission for the data for further including such as internet and multimedia content.In the presence of a large amount of different wireless communication techniques and mark
It is accurate.Some examples of wireless communication standard include GSM, UMTS (WCDMA, TD-SCDMA), LTE, LTE Advanced (LTE-
A), 3GPP2CDMA2000 (for example, 1xRTT, 1xEV-DO, HRPD, eHRPD), IEEE802.11 (WLAN or Wi-Fi),
IEEE802.16 (WiMAX), Bluetooth (bluetooth) etc..Some in these standards can serve as supplementary functions, and other
Standard can be generally considered as being intended to satisfy that the competitor of the similar needs in consumer.
In TD-SCDMA cellular communication systems, wireless heterogeneous networks (RRC) connection, which is established, to be generally included by asking RRC
The wireless device of connection sends preamble on uplink pilot channel (UpPCH) or uplink synchronisation (ULSync) disappears
Breath.If having successfully received this preamble by the serving cell of wireless device or uplink synchronisation (ULSync) disappearing
Breath, then serving cell, which can then be sent in physical access channel (FPACH), confirms (ACK).Then, wireless device
Random access request can be sent on Physical Random Access Channel (PRACH).If success in this way, it can establish
RRC connections.As a part for RRC cell updating courses, similar process can be executed, for example, in RRC_ connection moulds
(for example, while being carrying out audio call or other communications) wireless device is converted to from a serving cell while formula
When different serving cell.
Network operator in this TD-SCDMA system can indicate every in the parts UpPCH and PRACH of the process
One network it is expected power.For example, can indicate that initial UpPCH networks it is expected power in system information block (SIB), and
By wireless device in response to successful ULSync message sinks to FPACH ACK can indicate PRACH networks it is expected power.But
It is that in some cases, for given channel condition, it is enough that PRACH networks it is expected that power may be insufficient, and using as a result, should
Any PRACH of power level sends trial may be unsuccessful, is attempted relatively to potentially result in send with these PRACH
Any RRC connection request or the cell updating course failure answered.
Therefore, it will be desirable to the improvement to wireless communication, particularly, to the PRACH in TD-SCDMA cellular communication systems
The improvement of power estimation.
Invention content
According to aforementioned and other problem, it will be desirable to provide a kind of for wireless in TD-SCDMA cellular communication systems
Device makes its PRACH power based on the method for successful UpPCH power levels at least some situations.
For example, it is unsuccessful if it is expected that the first PRACH of power is attempted using the network of instruction, it would be possible that can wish to make
The PRACH power levels attempted for next PRACH are determined with alternative technology.Particularly, due to TD-SCDMA systems
System provides the power ramp mechanism sent for the UpPCH of connecting, this may enable devices to finally realize via UpPCH
ULSync message is successfully transmitted, so, if it is unsuccessful it is expected that the first PRACH of power level is attempted using network,
It may want to estimate the PRACH transmission power levels attempted for the 2nd PRACH using the mechanism.
Therefore, the embodiment of such a method of presentation herein and the UE for being configured as realizing this method, this method are
Wireless user equipment (UE) device estimates PRACH power based on the UpPCH power ramps in TD-SCDMA cellular communication systems.
UE may include one or more radio devices for executing wireless communication with base station (BS) comprising one or more day
Line.UE can also include be configured as realize this method device logic (its may include processor and storage medium and/or
Hardware logic).The also embodiment of presentation storage medium (for example, non-transient computer may have access to storage medium), the storage
Device media storage can be executed by processor to execute some or all of program instruction of this method.
Description of the drawings
It can be obtained to the more preferable of the theme of the application when being considered in conjunction with the accompanying following detailed description to embodiment
Understand, in the accompanying drawings：
Fig. 1 shows exemplary (and simplification) wireless communication system；
Fig. 2 shows the base stations (BS) communicated with user equipment (UE) device；
Fig. 3 shows the exemplary block diagram of UE；
Fig. 4 shows the exemplary block diagram of BS；
Fig. 5 is the diagram for the various aspects for showing TD-SCDMA cellular systems；And
Fig. 6 is to show UE based on UpPCH power ramps to estimate the flow chart of the illustrative methods of PRACH power.
Although features described herein can be carry out various modifications with interchangeable form, its specific embodiment with
Way of example is shown in the accompanying drawings, and is described in detail herein.It should be appreciated, however, that these attached drawings and its
Detailed description is not intended to be limitation particular forms disclosed, is fallen within by appended claims on the contrary, it is intended to covering
All modifications, equivalent and substitute in the spirit and scope of the theme of restriction.
Specific implementation mode
Initial
Following initial is used in the disclosure：
UE：User equipment
BS：Base station
GSM：Global system for mobile communications
UMTS：Universal Mobile Telecommunications System
LTE：Long term evolution
TD-SCDMA：Time division multiple access
TD-LTE：Time-division LTE
FD-LTE：Frequency division LTE
UpPCH：Uplink pilot channel
DwPCH：Downlink
UpPTS：Uplink pilot time slot
DwPTS：Down link pilot timeslot
FPACH：Physical access channel
PRACH；Physical Random Access Channel
RRC：Radio resource control
Term
Here is the nomenclature used in the disclosure：
Any various types of memory devices of storage medium-or storage device.Term " storage medium " should wrap
It includes：Install medium, for example, CD-ROM, floppy disk or magnetic tape equipment；Computer system memory or random access storage device, for example,
DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM etc.；Nonvolatile memory, for example, flash memory, magnetic medium etc., than
Such as, hard drives or optical memory；The memory component etc. of register or other similar types.Storage medium can be also
Including other kinds of memory or combinations thereof.In addition, storage medium can be located at the first computer system for executing program
In, or can be located at through the network of such as internet and the second different computer system that first computer system connects
In.In latter example, second computer system can provide program instruction to the first computer for execution.Term " is deposited
Storage medium " may include two or more storage mediums, these storage mediums may reside within different positions, example
Such as, in the different computer systems by network connection.Storage medium can store can be by one or more processors
The program instruction (for example, being carried out as computer program) of execution.
Carrier media-above-mentioned storage medium and physical transmission medium, for example, bus, network and/or transmission are all
Such as other physical transmission mediums of the signal of electric signal, electromagnetic signal or digital signal.
Programmable hardware element-includes various hard comprising the multiple programmable function blocks connected via programmable interconnection piece
Part device.Example includes FPGA (field programmable gate array), PLD (programmable logic device), FPOA (field programmable object battle arrays
Row) and CPLD (complicated PLD).Programmable function blocks can be from fine-grained (combinational logic or look-up table) to coarseness (calculate
Art logic unit or processor core).Programmable hardware element is also referred to as " reconfigurable logic ".
Any various types of calculating of computer system-or processing system comprising personal computer system (PC), large size
Computer system, work station, the network equipment, internet device, personal digital assistant (PDA), television system, computing system
Or the combination of other devices or device.Usually, term " computer system " can be broadly defined as covering having and hold
Any device (or combination of device) of at least one processor of instruction of the row from storage medium.
User equipment (UE) (or " UE devices ")-movement the or portable any various types for executing wireless communication
Computer system apparatus.The example of UE devices includes mobile phone or smart phone (for example, iPhoneTM、AndroidTMSystem
Phone), portable type game device is (for example, Nintendo DSTM、PlayStation PortableTM、Gameboy
AdvanceTM、iPhoneTM), laptop computer, PDA, portable internet device, music player, data storage device
Or other hand-held devices etc..Usually, term " UE " or " UE devices " can be broadly defined as covering the easy fortune of user
Any electronics, calculating and/or the telecommunication installation (or combination of device) that send and can wirelessly communicate.
The ordinary meaning of base station-term " base station " is broad, also, term " base station " include at least mounted on fixed position and
It is used as the wireless communications station of the part communication of radio telephone system or radio system.
Processing element-refers to the combination of various elements or element.For example, processing element includes such as ASIC (special integrated
Circuit) circuit, the part of each processor core or circuit, entire processor core, each processor, such as field programmable gate array
Arrange the programmable hardware device of (FPGA), and/or the major part of the system including multiple processors.
Channel-is used for information being transmitted to the medium of receiver from transmitter (transmitter).It should be noted that due to term
The feature of " channel " can be different according to different wireless protocols, so, term " channel " used herein can by regarding
To be used in a manner of consistent with the standard of the type for the device for using the term.In some standards, channel width may
It is variable (for example, depending on device capability, frequency band condition etc.).For example, LTE can support measuring for 1.4MHz to 20MHz
Survey channel width.On the contrary, WLAN channels can be 22MHz wide, and Bluetooth channels can be 1MHz wide.Other agreements and
Standard may include the different definition to channel.In addition, some standards can define and using multiple types channel, for example,
The difference used for the different channels of uplink or downlink and/or the difference for data, control information etc.
Channel.
" automatically " it refers to by computer system (for example, software that computer system executes) or device (device)
(for example, circuit, programmable hardware element, ASIC etc.) carried out and user is not directly specified or the action carried out or behaviour
Make.Therefore, the specified ground of term " automatically " and user or manually carry out operation (in this operation, user provide input with
Directly operated) it is contrasted.Automated procedure can customer-furnished input initiate, the still subsequent action of " automatic " execution
It is not specified by user then, i.e., is not that (in the case of " artificial " progress, user specifies what is each carried out to move for " artificial " progress
Make).For example, even if computing system is responsive to user action and update table, user is by selecting each field and providing
Input specify information (for example, by knocking in information, selection check box, radio selection etc.) is still to be filled in manually to fill up a form
Table.The table can be by computer system Auto-writing, in the case, and computer system in computer system (for example, execute
Software) analysis table field and in the case that there is no any of the specified answer for field input by user to fill in
Table.As described above, user can adopting form Auto-writing, but be not involved in the actually filling out of table (for example, user not people
The specified answer for field in building site, but the specified of the answer of field is performed automatically).Present disclose provides in response to user
Execution acts and the various examples of operation that carry out automatically.
Fig. 1 and Fig. 2 --- communication system
Fig. 1 shows illustrative (and simplification) wireless communication system.It is noted that the system of Fig. 1 is only possible
One example of system, and embodiment of the disclosure can be realized with any one of various systems as needed.
As shown, illustrative radio communications system includes base station 102A, base station 102A is for example through transmission medium
It is communicated with one or more user apparatus 106A, 106B etc. to 106N.Each in user apparatus is referred to alternatively as " user herein
Equipment (UE) ".Therefore, user apparatus is referred to as UE or UE devices.
Base station 102A can be base transceiver station (BTS) or cellular station, and may include making it possible to UE106A extremely
The hardware that 106N is carried out wireless communication.Base station 102A can also be provided as with network 100 (in various possibilities, e.g. bee
The telecommunication network and/or internet of the core network of nest service provider, such as Public Switched Telephone Network (PSTN)) communication.
Therefore, base station 102A can help to communication between user apparatus and/or between user apparatus and network 100.
The communication zone (or overlay area) of base station is referred to alternatively as " cell (cell) ".102A and UE106 can quilts for base station
Be configured so that it is any in various radio access technologies (RAT) communicated through transmission medium, radio access technologies are also
Be referred to as wireless communication technique or telecommunication standard, such as GSM, WCDMA, TD-SCDMA, LTE, Advanced LTE (LTE-A),
3GPP2CDMA2000 (for example, 1xRTT, 1xEV-DO, HRPD, eHRPD), Wi-Fi, WiMAX etc..
According to the base station 102A of identical or different cellular standards operation and other similar base station (such as, base stations
102B...102N) therefore it can be provided as the network of cell, it can be via one or more cellular standards in wide geographic region
On domain continuous or nearly singular integral Overlay Service is provided to UE106A-N and similar device.
Therefore, when base station 102A as shown in Figure 1 can be used as " serving cell " of UE106A-N, each UE106 may also
The signal from one or more of the other cell (being provided by base station 102B-N and/or any other base station) can be received (simultaneously
And may be in the communication range of one or more of the other cell), which is referred to alternatively as " adjacent small
Area ".Such cell may also can aid in communication between user apparatus and/or between user apparatus and network 100.
Such cell may include " macro " cell, micro-cell, " pico- " cell, and/or provide the various other of service area dimension
The cell of any one of granularity.For example, base station 102A-B shown in FIG. 1 can be macrocell, and base station 102N can be micro-
Cell.Other configurations are also possible.
It is noted that UE106 can be communicated using various wireless communication standard.For example, UE106 can be configured
For use GSM, TD-SCDMA, WCDMA, CDMA2000, WiMAX, LTE (including TD-LTE and/or FD-LTE), LTE-A (including
TD-LTE-A and/or FD-LTE-A), WLAN, Bluetooth, one or more Global Satellite Navigation System (GNSS, such as GPS
Or GLONASS), two kinds in a kind of and/or a variety of mobile TV broadcast standards (for example, ATSC-M/H or DVB-H) etc. or more
It is a variety of to be communicated.Other combinations (including two or more wireless communication standards) of wireless communication standard are also possible.
Fig. 2 shows the user equipmenies 106 communicated with base station 102 (for example, one of base station 102A to 102N) (for example, device
One of 106A to 106N).UE106 can be the device for having cellular communication capability, such as mobile phone, mancarried device, meter
Calculation machine or tablet computer or essentially any type of wireless device.
UE106 may include the processor for being configured as executing the program instruction stored in memory.UE106 can pass through execution
The instruction stored in this way executes any one of embodiment of the method described herein.Alternatively or additionally, UE106
It may include being configured as executing times in any of embodiment of the method described herein or embodiment of the method described herein
One any portion of programmable hardware element, such as FPGA (field programmable gate array).
In some embodiments, UE106 can be configured with a variety of radio access technologies/wireless communication protocol and carry out
Communication.For example, UE106 can be configured with two kinds in TD-SCDMA, LTE, LTE-A, WLAN/Wi-Fi or GNSS or more
It is a variety of to be communicated.Other combinations of wireless communication technique are also possible.
UE106 may include one or more antennas for using one or more wireless communication protocols to be communicated.?
In some embodiments, UE106 can share one or more portions of reception and/or transmitting chain between various wireless communication standard
Point.Shared radio device (radio) may include individual antenna, or may include mutiple antennas (for example, being directed to MIMO), use
In executing wireless communication.Alternatively, UE106 may include being configured as each wireless communication association communicated by it for UE
The individual transmitting of view and/or reception chain (e.g., including individually antenna and other multiple component units).It is substituted as another kind
Mode, UE106 may include the one or more radio devices shared between various wireless communication agreement or by single nothings
Line communication equipment exclusively with one or more radio devices.Other configurations are also possible.
The exemplary block diagram of Fig. 3-UE
Fig. 3 shows the exemplary block diagram of UE106.As shown, UE106 may include system on chip (SOC) 300, the on piece
System may include being used for part for various purposes.For example, as shown, SOC300 may include can perform the program for UE106
The processor 302 of instruction and executable graphics process and the display circuit 304 that display 360 will be supply display signals to.
Processor 302 may also coupled to memory management unit (MMU) 340, which can be configured as from processor
302 receive addresses, and by these address conversions at memory (for example, memory 306, read-only memory (ROM) 350, NAND
Flash memory 310) in position and/or be transformed into other circuits or device (such as display circuit 304, radio device 330, connection
Device I/F320 and/or display 360).MMU340 can be configured as executing memory protection and page table conversion or establish.At some
In embodiment, MMU340 can be used as the part of processor 302 by comprising.
As shown, SOC300 can be couple to the various other circuits of UE106.For example, UE106 may include it is various types of
Memory (e.g., including nand flash memory 310), connector interface 320 is (for example, for being couple to computer system, connecing depressed place
(dock), charging station etc.), display 360 and radio communication circuit (for example, for TD-SCDMA, LTE, Wi-Fi, GPS etc.).
UE devices 106 may include at least one antenna, and may include mutiple antennas in some embodiments, for
Base station and/or other devices carry out wireless communication.For example, antenna 335 can be used to be communicated for UE devices 106.As described above,
In some embodiments, UE can be configured with multiple wireless communication standards and carry out wireless communication.
As described further below, UE106 may include for realizing adaptively scaling neighboring community (scale) measurement
And/or the hardware and software component of the feature (such as specifically referring to those features described in Fig. 6 in text) of assessment.UE devices
106 processor 302 can be configured as example by executing storage medium (for example, non-transient computer readable memory is situated between
Matter) on the program instruction that stores realize some or all of the method described in text.In other embodiments, processor
302 can be configured as the programmable hardware element of such as FPGA (field programmable gate array), or be configured as ASIC (special collection
At circuit).Alternatively or additionally, the processor 302 of UE devices 106 can together with other components 300,304,306,310,
320,330,335,340,350, one or more of 360 it is configured as realizing that the feature described in text is (such as literary together
In specifically referring to those features described in Fig. 6) in part or all.
The exemplary block diagram of Fig. 4-base station
Fig. 4 shows the exemplary block diagram of base station 102.It is noted that the base station of Fig. 4 is only an example of possible base station.
As shown, base station 102 may include processor 404, which can perform the program instruction for base station 102.Processor
404 may also coupled to memory management unit (MMU) 440, which can be configured as from processor 404
Address is received, and by these address conversions at the position in memory (for example, memory 460 and read-only memory (ROM) 450)
Set and/or be transformed into other circuits or device.
Base station 102 may include at least one network port 470.The network port 470 can be configured to couple to telephone network,
And as described in above in fig 1 and 2 so that multiple devices of such as UE devices 106 may have access to telephone network.
The network port 470 (the either additional network port) can also or alternatively be configured to couple to cellular network
(for example, core network of cellular service provider).Core network can provide mobility to a variety of devices (such as UE devices 106)
Related service and/or other services.In some cases, the network port 470 can be couple to telephone network via core network,
And/or core network can provide telephone network (for example, among other UE devices by cellular service provider service).
Base station 102 may include at least one antenna 434, and may include mutiple antennas.At least one antenna 434 can quilt
It is configured to operate as transceiver, and can be further configured to logical via radio device 430 and UE devices 106
Letter.Antenna 434 is communicated via communication chain 432 with radio device 430.Communication chain 432 can be reception chain, transmitting chain or two
Person.Radio device 430 can be configured as to be communicated via various radio telecommunications standards, the various radio telecommunication marks
Standard includes but not limited to LTE, LTE-A, TD-SCDMA, WCDMA, CDMA2000 etc..
The processor 404 of base station 102 can be configured as example by executing storage medium (for example, non-transient computer
Readable memory medium) on the program instruction that stores realize some or all of the method described in text.Alternatively,
Processor 404 can be configured as the programmable hardware element of such as FPGA (field programmable gate array), or be configured as ASIC
(application-specific integrated circuit) or combination thereof.
Fig. 5-example T D-SCMA cellular communication systems
Fig. 5 is the high level view for the characteristic for showing TD-SCMA cellular communication systems.It should be noted that shown or described
Characteristic represents a possible set of the characteristic of TD-SCDMA system, and other systems with other characteristics are also possible.
Therefore, shown or described characteristic is only provided as example, and generally speaking, not expected to be confined to the disclosure.
The system can provide multiple access feature (multiple access in two dimensions or possible three dimensions
feature).As shown in vertical pivot, increases power density and may make the increased CDMA codes of quantity in each given uplink
It is layered in link or downlink transmission；Therefore, different users can be supplied to different CDMA codes, thus can (for example,
By serving cell) it is provided while cellular service.
In addition, as shown in horizontal axis, multiple time slots are can define.Fig. 5 shows a subframe in time shaft, as shown, should
Subframe can be 5ms long and may include seven time slots.Different users can be assigned using different time slots, another to increase
One multiple access dimension.As shown, in TD-SCDMA system, when the first time slot (TS0) of subframe can be downlink
Gap.Frequently, at least the second time slot (TS1) can be uplink time slot, and still, the subsequent time slot in subframe can be according to need
It is assigned to uplink or downlink time slots.However, as shown, for the mistake from downlink to uplink
It crosses, using down link pilot timeslot (DwPTS), protective time slot and uplink pilot time slot (UpPTS), such as with
Just consider that interface (transmission time) postpones.
It if desired, can be by defining and being provided using multiple carrier frequencies another as shown on depth axis
A access is accessed more.In TD-SCDMA, as shown, each carrier wave can be 1.6MHz wide.It should be noted, however, that also can be used
Single carrier frequency realizes TD-SCDMA.
TD-SCDMA system can be synchronous, it means that all cells in the system can be synchronized.Should also it refer to
Go out, TD-SCDMA system can also carry out interference management using joint detection algorithm.As further described in the text (specifically referring to
Fig. 6 descriptions), some aspects of the disclosure can relate to TD-SCDMA cellular systems, such as can be by with as shown in Figure 5 and join
It is characterized according to the similar mode of mode of Fig. 5 descriptions.
Fig. 6-flow chart
In order to carry out cellular communication, wireless UE device 106 may be selected that the first community of (camp) will be stopped on it.First
Cell can be grasped according to cellular technology (GSM, TD-SCDMA, W-CDMA, LTE, CDMA2000 (1xRTT, 1xEVDO) etc.)
Make.Therefore first community can be provided by base station 102, and can provide the company of the core network of such as cellular service provider
It connects, the user of UE106 can have the reservation (subscription) for providing cellular service and/or other agreements as a result,.Base station
102 can operate together with a number of other base stations (can provide other cells) and other network hardwares and software, in wide geographic region
The overlapping wireless service of continuous (or nearly singular integral) is provided on domain.
First community can be by small from the one or more that can be provided by neighbouring base station in the range for wireless communication of UE106
It is selected in area.Such as according to signal strength/quality, license, technology interoperability etc., UE106 can be adjacent small from these
It found in some or all of area, detect signal, and can be communicated with some or all of these neighboring communities.It can
In some possible criterion (for example, the channel radio traffic of cell is crowded, operator of cell, cell are operated according to it
Wireless technology etc.) in, among signal strength and/or signal quality metrics based on first community and/or other adjacent cells
It is one or more, select first community from the cell in the range for wireless communication of UE106.
According to some embodiments, can for example it be powered to UE106 (alternatively, may limited operation or " flight for example left
After pattern ", after being powered to the radio device of UE106), select first community as initial cell selection.It can replace
Dai Di can be used as the part in cell-reselection procedure to select first community.For example, according to some embodiments, such as make
For be moved to from the coverage of previous serving cell new cell (for example, first community) coverage as a result, based on
The signal strength and/or quality of deterioration are experienced on previous serving cell, UE106 can perform cell-reselection procedure to select to have
There is the new cell (for example, first community) of preferable signal strength and/or quality.
It can be designed to be communicated with cell according to multiple modes of operation using the wireless device of cellular communication.Example
Such as, a variety of wireless devices can at the idling mode or in the connection mode operate.Idle mode can be used in base
Battery power conservation is given during this inactive period, and it will be appropriate at least periodically to check the connection of more initiative (active)
Message or instruction (for example, paging message).Connection mode can be used for the active communication between cell and wireless device.
Therefore, UE106 may be needed to be in idle mode every now and then and be rested in first community.First community can take
Business UE106 and the connection (for example, being connected to be passive when handling idle mode) provided to core network.The free time of UE106
The essence of pattern operation can change according to different wireless communication techniques.In general, UE106 not with network actively
(for example, as calling or part of the networking application of such as web browser) idle mode operations can when ground exchanges data
To be appropriate.
However, when it is desirable that active data exchange when, (for example, if user initiate outgoing call, or initiate such as net
The networking application of page browsing device or e-mail program etc and various other possibilities), UE106 can attempt to enter
Connection mode.May include establishing either nothing of the activation at one of wireless device and base station or the two into connection mode
Line electric resources control (RRC) entity.
This process can be initiated by means of RRC connection request.RRC connection procedures can according to different cellular standards with
And even according to using similar cellular standards different network operator (although with about process steps, communicate letter
Road etc. is compared, which kind of degree usually not necessarily such as arrived about parameter value).
In all TD-SCDMA cellular communication systems as described with respect to FIG 5, attempt to set up what RRC was connect with serving BS
UE106 can send the uplink synchronisation (ULSync) as lead code first on uplink pilot channel (UpPCH)
Message.If it is had successfully received by the serving cell of UE106, serving cell can be then in physical access channel
(FPACH) it is sent on and confirms (ACK).Then UE106 can send random access request on physical accidental channel (PRACH).
If it succeeds, RRC connections can be established.It is noted that the part as RRC cell updating courses, can execute similar
Process, for example, (for example, when the communication for being carrying out audio call or other actives while in RRC_ connection modes
When wireless device is converted to different serving cells from a serving cell simultaneously).
Network operator in this TD-SCDMA system can be that the UpPCH of the process is partly every with the parts PRACH
One indicates that network it is expected power.For example, initial UpPCH networks it is expected that power can indicate in system information block (SIB),
And it can indicate that PRACH networks it is expected power in response to the FPACH ACK of successful ULSync message sinks by UE106.Network
Operator can it is expected power calculation by their PRACH networks of configuration any one of in various ways, this is in many situations
Under PRACH networks appropriate can be caused it is expected power.However, for example under certain channel conditions, it is understood that there may be wherein PRACH
Network it is expected the enough situations of underpower.If it is the case, then any can using the PRACH transmission trials of the power level
Can be all unsuccessful, to potentially cause any RRC connection request corresponding with these PRACH transmission trials or cell more
New procedure failure.
Accordingly, it is desirable to provide the method that UE106 determines PRACH power in a manner of alternative, is especially using PRACH nets
When network it is expected that the first PRACH of power attempts unsuccessful.Fig. 6 is to illustrate for UE106 estimation PRACH transmission powers in this way
A kind of flow chart of method.In addition to other devices, in figure 6 shown in method can be calculated with shown in the figures above
Any one of machine system or device are used in combination.In various embodiments, some elements of shown method element can
It executes, or can be omitted to be performed simultaneously, with the order different from shown order.When wishing, also can perform
Additional method element.As shown, this method operates as follows.
In the first trial that the executable foundation of 602, UE106 is connect with the radio resource control of network.It is attempted first
In, UE106 can utilize network it is expected power level.
Therefore, UE106 initially can it is expected that power level is sent on UpPCH with the initial network of UpPCH communications
ULSync message.The initial network of UpPCH communications it is expected that power level can be inclined dependent on network characteristic, network operator by network
Any any one of in various ways configuration (calculating) of good and/or a variety of other factors.As described above, UpPCH is logical
The initial network of letter it is expected that power level can be indicated to UE106 by means of system information block (SIB)；UpPCH is communicated initial
Network it is expected that power level can also be indicated to UE106 with any one of a variety of other manners；For example, when wishing, network
One or more parameter can be provided, and may specify that UE106 calculates the initial network expectation power level of UpPCH communications, and
It is not that the initial network directly communicated to UE106 instructions UpPCH it is expected power level.
If initial ULSync message is successfully received (for example, at serving cell of UE106) by network, network can be through
Confirmation message (ACK) is provided by FPACH.Other than including to be used as the confirmation that ULSync message has been successfully received, FPACH
ACK can also include any one of much information.Specifically, FPACH ACK can provide timing corrective command (for example, with
Just the uplink communication between UE106 and network is synchronized) and may indicate that the network of PRACH communications it is expected power level (example
Such as, the transmission power level order of RACH message).
If initial ULSync message is not successfully received by network, UE106 can detect this point.Example
Such as, network, which may specify, provides FPACH ACK in a certain pre-configuration (for example, by network) time quantum after sending ULSync.
If not receiving ACK (for example, if corresponding timer expires) within the period, UE106 can determine initially
ULSync message is not successfully received by network.
In this case, the first subsequent ULSync message can be transmitted in UE106.The subsequent ULSync message can have
It is incremented by higher power level than initial ULSync message.Increment can be in all size (for example, 1dB, 2dB, 3dB etc.)
It is any, and can be by network configuration.Increment, which increases, is also referred to as power ramp step-length.
If the first subsequent ULSync message is successfully received (for example, at serving cell of UE106) by network,
Network can provide confirmation message (ACK) via FPACH, essentially as described above.If the first subsequent ULSync message not by
Network is successfully received, then UE106 can also detect this point (for example, based on not existing in the time quantum of pre-determining
ACK is received on FPACH), and transmittable second subsequent ULSync message.Second subsequent ULSync message can have than
First subsequent ULSync message is incremented by higher power level.Increment can be similar to initial ULSync message and first subsequent
Increment between ULSync message.It can send to have according to (for example, network configuration) interval appropriate and be incremented by higher hair
The similar additional subsequent ULSync message of power level (for example, power ramp makes power level stepping rise) is sent, directly
ACK is extremely received on FPACH in response to one of ULSync message.
It is noted that in TD-SCDMA, each subframe (all as shown in Figure 5) can be 5ms long, and may include 7
Time slot.Then considered by example hereinafter, be used as one of one or more as described above ULSync message it is possible when
Sequence example, it is understood that there may be following situation sends a ULSync message that is, in any given subframe by given UE106.As
One possibility particularly, ULSync message can be sent during the UpPTS to stator frame on UpPCH.If in son
Do not receive ACK when frame end also, then UE106 can determine that ULSync message is not successfully received by network.It then can be under
Subsequent ULSync message is sent during one subframe.It is noted that alternative sequential example is also possible, and case above is only logical
Example offer is provided.
Once receiving ACK, then UE106 can be used as the first trial of foundation and the radio resource control connection of network
A part sends random access request (RACH) message on prach.RACH can it is expected according to the network communicated for PRACH
Power level (for example, as indicated in FPACH ACK) transmission.
As described above, in some cases, although it is expected that power level is sent with network, RACH may also be unsuccessful.Such as
Fruit network does not consider radio interface condition suitably, for example, network may indicate that the phase being successfully received by network less than RACH
Hope the expectation power level of power level.
There is provided for ULSync message that power ramp mechanism is different, and TD-SCDMA specifications are not currently from TD-SCDMA specifications
UE106 is provided during the trial for establishing RRC connections attempts multiple RACH.Therefore, if it is expected that power level is sent with network
RACH it is unsuccessful, then establish connect with the RRC of network first trial possibility therefore it is unsuccessful.
Therefore, in this case, as shown in step 604, UE106, which can be determined, establishes the to the RRC connections of network
One trial (and specifically RACH during first attempts) is unsuccessful.With determine ULSync message not by network successfully
Receive it is similar, this can (for example, pre-determining/network configuration) a certain simply by determination time quantum pass by, and go back
The response to RACH is not received to realize.
If using network it is expected power level RACH attempt it is unsuccessful, it is all as described above in the case of, then
In executable the second trials for establishing RRC connections of 606, UE106.Although establishing the first of RRC connections to attempt it is expected using network
Power level, establish RRC connections second are attempted using alternately determining power level.
Specifically, not being that the network communicated with UpPCH it is expected that power level sends the initial ULSync that second attempts and disappears
Breath, but UE106 can send the first of the second trial based on the power level of the power level used during first attempts
Beginning ULSync message.More specifically, the power level of the initial ULSync message for sending the second trial can be dependent on the
Whether the one initial ULSync message attempted is successfully received on.
If the first initial ULSync message attempted is successfully received on, the power for the transmission may be big
In required.Accordingly, it may be desirable to be provided for the transmission power for the initial ULSync message that second attempts first
The transmission power level of RACH is sent during trial.In other words, the PRACH indicated in the ACK received between the first trial period
The network of communication it is expected that power level is used as the transmission power level of the initial ULSync message of the second trial.It can be
Enough subsequent ULSync message is sent on UpPCH, each message has is incremented by higher power transmission than a upper message
Level, until receiving ACK on FPACH in response to one of they.
If the first initial ULSync message attempted is not successfully received on, in response to one or more
Before one of subsequent ULSync message receives ACK on FPACH, first attempt during send it is one or more after
Continuous ULSync message, be then more likely used for the transmission (successful ULSync message) power level will enough but do not surpass
Go out RACH.Therefore, in this case, for second attempt, initial ULSync message can with in response to it first
The power level that the corresponding power level of ULSync message of ACK is received between trial period is sent.
This is because in first attempts, sending the power level for the initial ULSync message that second attempts causes by network
It is successfully received and ACK, it is therefore, similar it is possible that the second initial ULSync message attempted also successfully will by network
It receives, and receives ACK on FPACH by UE106 in response.However, if its is unsuccessful (for example, due to change
Network condition), then one or more subsequent ULSync message can be transmitted, each message has to be incremented by more than a upper message
High power transmission level, until receiving ACK on FPACH in response to one of these message.
Therefore, in either case (that is, no matter for second attempt the initial selected transmission of ULSync message
Power level is how), can be by the ULSync message that network is successfully received there will be what is sent during second attempts, and ring
ACK should be can receive in the message.
Once receiving ACK, UE106 can be directed to second and attempt to send RACH message on prach.However, not being to use
Second attempt ACK in indicate PRACH communication network it is expected power level, but UE106 can with in response to it
Corresponding the second trial of power level transmission of power level that the ULSync message of ACK uses is received between the second trial period
RACH message.
Power level due to sending the RACH message that second attempts leads to the ULSync message being successfully received,
It is likely that the second RACH message attempted can be also successfully received by network.This can then so that UE106 is successfully complete
Process is established at RRC connections, or at least pushes ahead UE106 (for example, RRC connections are established during RRC connections are established
Any other aspect of process, possibly relies on network configuration).
Therefore, by sending work(using alternate PRACH if it is expected that the transmission of power level is unsuccessful using network
Rate level, and the power ramp mechanism provided is sent to estimate that these are potential alternately in particular by UpPCH is utilized as
PRACH transmission power levels, described in such as method herein in relation to Fig. 6, grasped in TD-SCDMA cellular communication systems
The UE106 of work can ensure or at least be significantly greatly increased successfully the chance of PRACH processes, without excessively estimating required work(
Rate.In addition, proposed reattempt cycle usually can be sufficiently fast, in RRC connection timers (for example, T300 timers) mistake
It establishes before phase and is connect with the RRC of network.In comparison, even if in the network expectation power level for proving that PRACH is sent
UE106 continues to it is expected power level using the network that the PRACH is sent when insufficient, then UE106 may repeat unsuccessful RRC
Connection is attempted, until RRC connection timers are expired, to potentially result in radio bearer setup complete.
Embodiment of the disclosure can be realized according to any one of diversified forms.For example, some embodiments can be implemented
For computer implemented method, computer readable memory medium or computer system.Other embodiments can be by using all
As the hardware device of one or more custom design of ASIC is realized.Other embodiments can be by using such as FPGA etc
One or more programmable hardware element realize.
In some embodiments, non-transitory computer readable memory medium is configured such that it stores program
Instruction and/or data cause computer system to execute method if wherein program instruction is executed by computer system, such as
Any one of embodiment of the method described herein either any combinations of embodiment of the method described herein or described herein
Embodiment of the method any type any subset or this subset any combinations.
In some embodiments, device (for example, UE106) can be configured as including processor (one group of processor) and deposit
Storage medium, wherein storage medium store program instruction, and wherein processor is configured as reading and executing from storage medium
Program instruction, wherein program instruction are executable, with realize various embodiments of the method described herein any type (or
Any subset of any type of any combinations of embodiment of the method described herein or embodiment of the method described herein,
Or any combinations of this subset).The device can any one of diversified forms realize.
Although embodiment has had been described in detail above, above disclosure, Duo Zhongbian are once understood completely
Shape and modification will become apparent to those skilled in the art.It is intended to so that following following claims is interpreted to cover all this changes
Shape and modification.
Claims (20)
1. one kind establishing radio resource control for wireless user equipment (UE) device in TD-SCDMA cellular communication systems
(RRC) method connected, this method include：
Initiate to establish RRC connections first is attempted, which includes：
One or more first uplink synchronisation (ULSync) message are sent on uplink pilot channel (UpPCH),
In, it is expected that power level sends the first initial ULSync message for the initial network of UpPCH communications, also, with phase
Subsequent first ULSync message is sent for the incremental power level of the first initial ULSync message；
The first confirmation message (ACK) is received in physical access channel (FPACH) in response to one of the first ULSync message,
Wherein, the first ACK instructions it is expected power level for the network of Physical Random Access Channel (PRACH) communication；
The first random access request (RACH) message is sent on prach, wherein the network for PRACH communications it is expected work(
Rate level sends the first RACH message；
Determine that the first RACH is unsuccessful；
In response to determining that the first RACH is unsuccessful, initiate to establish RRC connections second is attempted, which includes：
One or more 2nd ULSync message are sent on UpPCH,
Wherein, if the first ACK is received in response to the first initial ULSync message, with what is indicated by the first ACK
Network for PRACH communications it is expected that power level sends the 2nd initial ULSync message；
Wherein, if the first ACK is received in response to subsequent first ULSync message, to be received in response to it
The corresponding power level of the first ULSync message of first ACK sends the 2nd initial ULSync message；
Wherein, subsequent 2nd ULSync is sent with the incremental power level relative to the 2nd initial ULSync message to disappear
Breath；
The 2nd ACK is received on FPACH in response to one of the 2nd ULSync message；
Send the 2nd RACH message on prach, wherein with the 2nd ULSync message that the 2nd ACK is received in response to it
Corresponding power level sends the 2nd RACH message.
2. a kind of establish and the radio of network for wireless user equipment (UE) device in TD-SCDMA cellular communication systems
The method of resources control (RRC) connection, this method include：
It executes first for establishing and connecting with the RRC of network to attempt, which is included in uplink pilot channel (UpPCH)
With at least one message of transmission in each in Physical Random Access Channel (PRACH), wherein be used for during first attempts
The primary power level of transmission on UpPCH and for transmission on prach power level depend on network it is expected work(
Rate level；
Determine that the first trial is unsuccessful；
In response to determining that the first trial is unsuccessful and executes the second trial for establishing RRC connections, which is included in UpPCH
With at least one message of transmission in each in PRACH, wherein for the transmission on UpPCH during second attempts
Primary power level is used on prach based on the power level used during first attempts during second attempts
Transmission power level based on the power level for transmission on UpPCH during second attempts.
3. according to the method described in claim 2,
First is wherein executed to attempt to further include receiving confirmation message in response to the message sent on UpPCH,
Primary power level wherein for the transmission on UpPCH during second attempts corresponds to during first attempts
The power level of the power level of message sent on UpPCH, that the confirmation message is received in response to it.
4. according to the method described in claim 2,
Second is wherein executed to attempt to further include receiving confirmation message in response to the message sent on UpPCH,
Wherein during second attempts for the power level of transmission on prach correspond to during second attempts
The power level of the power level of message sent on UpPCH, that the confirmation message is received in response to it.
5. according to the method described in claim 2,
Wherein for establishing each in the connect with the RRC of network first trial and the second trial, sent on UpPCH
At least one message includes uplink synchronisation (ULSync) message.
6. according to the method described in claim 2,
Wherein for establishing each in the connect with the RRC of network first trial and the second trial, send on prach
At least one message includes random access request (RACH) message.
7. according to the method described in claim 2,
Wherein determine first attempt it is unsuccessful based on being to send out on PRACH in response to receiving the message sent on prach
The confirmation message for carrying out automatic network is not received in the time quantum being pre-configured after the transmission for the message sent.
8. according to the method described in claim 2, further including：
The information received in the system information block provided by network is provided, determines and is used for during first attempts
The network of transmission on UpPCH it is expected power level；And
It is based at least partially in the confirmation message received in response to the message sent on UpPCH during the first trial
Information determines that the network for transmission on prach during first attempts it is expected power level.
9. a kind of wireless user equipment (UE) device, including：
Radio device；And
Processing element is operably coupled to the radio device；
The wherein described radio device and the processing element are configured as：
It executes first for establishing and connecting with the radio resource control (RRC) of network to attempt, wherein being used for during first attempts
The primary power level of transmission on uplink pilot channel UpPCH and in Physical Random Access Channel PRACH
Transmission power level depend on network it is expected power level；
Determine that the first trial established and connect with the RRC of network is unsuccessful；
The second unsuccessful, execution foundation is connect with the RRC of network trial is attempted in response to determining first, wherein second trial
Include that at least one message is sent in each in UpPCH and PRACH, wherein in UpPCH during second attempts
On transmission primary power level based on the power level that uses during first attempts, also, used during second attempts
In transmission on prach power level based on the power level for transmission on UpPCH during second attempts.
10. wireless UE device according to claim 9,
It wherein establishes first connect with the RRC of network and attempts and establish the second trial being connect with the RRC of network each
The transmission of transmission and random access request message including at least one uplink synchronisation message.
11. wireless UE device according to claim 9, wherein the radio device and the processing element are also configured
For：
It is determined based on system information block for establishing the first Initial uplink synchronization message attempted being connect with the RRC of network
Network it is expected transmission power level.
12. wireless UE device according to claim 9,
It wherein establishes first connect with the RRC of network and attempts to include sending at least one uplink synchronisation message to network,
The wherein first Initial uplink synchronization message attempted it is expected transmission power level to send, wherein if not having with network
There is the response received to Initial uplink synchronization message, is then sent with incremental transmission power level one or more follow-up
Uplink synchronisation message.
13. wireless UE device according to claim 9, wherein the radio device and the processing element are also configured
For：
It is received come automatic network based on the uplink synchronisation message that first connect with the RRC of network in response to foundation is attempted
Confirmation message in instruction, determine the random access request message for establishing the connect with the RRC of network first trial
Network it is expected transmission power level.
14. wireless UE device according to claim 9, wherein the radio device and the processing element are also configured
For：
Determine the transmission power electricity for establishing the second Initial uplink synchronization message attempted being connect with the RRC of network
It is flat, wherein if the Initial uplink synchronization message for establishing the first trial being connect with the RRC of network is unsuccessful, for building
The identified transmission power level of the second Initial uplink synchronization message attempted of vertical RRC connections include for establishing and
The transmission power level for the successful uplink synchronisation message that the first of the RRC connections of network is attempted.
15. wireless UE device according to claim 14,
Wherein if the Initial uplink synchronization message success that first connect with the RRC of network is attempted is established, for building
The identified transmission power level of the second Initial uplink synchronization message attempted of vertical RRC connections is included in the first trial
Power level of the period for transmission on prach.
16. wireless UE device according to claim 9, wherein the radio device and the processing element are also configured
For：
Determine the transmission power level for establishing the second random access request message attempted being connect with the RRC of network,
In for establishes connect with the RRC of network second trial random access request message identified transmission power level packet
Include the transmission power level for establishing the second successful uplink synchronisation message attempted being connect with the RRC of network.
17. wireless UE device according to claim 9, wherein the radio device and the processing element are also configured
For：
It receives to the response for establishing the second random access request attempted being connect with the RRC of network, wherein the response
Complete the RRC establishment of connections between network and wireless UE device.
18. wireless UE device according to claim 9,
The wherein described radio device and the processing element are configured to attempt to establish and be connect with the RRC of network with from idle mould
Formula is changed into connection mode to execute the data exchange of active.
19. wireless UE device according to claim 9,
The wherein described radio device and the processing element are configured to attempt to establish and be connect with the RRC of network to execute RRC
Cell updating course.
20. wireless UE device according to claim 9,
Wherein network provides Time division multiple access (TD-SCDMA) cellular communication system.
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| US8149776B2 (en) * | 2009-05-12 | 2012-04-03 | Nokia Corporation | Method, apparatus and computer program for user equipment access channel procedures |
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| CN1464754A (en) * | 2002-06-25 | 2003-12-31 | 华为技术有限公司 | Method for sending access request from mobile terminal in radio communication system |
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