CN103687009A - Resource selection method for random access and terminal device - Google Patents
Resource selection method for random access and terminal device Download PDFInfo
- Publication number
- CN103687009A CN103687009A CN201310671695.1A CN201310671695A CN103687009A CN 103687009 A CN103687009 A CN 103687009A CN 201310671695 A CN201310671695 A CN 201310671695A CN 103687009 A CN103687009 A CN 103687009A
- Authority
- CN
- China
- Prior art keywords
- power
- preamble
- initial
- margin
- max
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010187 selection method Methods 0.000 title abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 109
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000013475 authorization Methods 0.000 claims 13
- 238000005457 optimization Methods 0.000 abstract description 5
- 238000004891 communication Methods 0.000 abstract description 3
- 230000002708 enhancing effect Effects 0.000 description 4
- 238000013468 resource allocation Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention relates to the field of wireless communication, and discloses a resource selection method for random access. The resource selection method for random access comprises the steps that UE obtains at least one of parameters including the power allowance, the path loss difference and the uplink transmission data size; an E-DCH resource is selected according to the obtained at least one parameter of the parameters including the power allowance, the path loss difference and the uplink transmission data size. The invention further discloses a terminal device. According to the scheme, due to the fact that the UE can select the appropriate E-DCH resource through the obtained power allowance or the obtained path loss difference or the obtained uplink transmission data size in the process of enhanced random access, the request for enhanced uplink access is carried out through the selected E-DCH resource, and control over UE uplink interference, optimization of uplink coverage and full utilization of uplink resources can be further achieved.
Description
The present application is a divisional application of chinese application entitled "resource selection method and terminal device in random access" filed on 29/4/2008, application No. 200810067051.0, the entire contents of which are incorporated herein by reference.
Technical Field
The invention relates to the field of wireless communication, in particular to a resource selection technology in a random access process.
Background
At 3GPP WCDMA R8 (3)rdIn a wireless communication system of Generation Partner Project wide Code division multiple Access Release8, a third Generation partnership Project Wideband Code division multiple Access R8 version), for a UE (User Equipment) in a non-proprietary state, in order to reduce uplink transmission delay and improve uplink transmission rate, enhanced random Access is introduced, and the enhanced random Access enhances the random Access in 3GPP WCDMA R99. Enhanced random access uses an Enhanced Dedicated Channel (E-DCH) instead of a Random Access Channel (RACH) to implement uplink transmission.
The enhanced random access includes a random access preamble (preamble) and resource allocation phase, a collision resolution phase, an E-DCH data transmission phase, and a release phase.
After the MAC (Medium Access Control) layer triggers the enhanced random Access procedure, the physical layer needs to select an uplink Access slot, a signature, and a preamble transmission power to transmit a preamble. The signature set of 16 signatures is divided into two subsets, and the PRACH (Physical random access channel) access in R99 and the enhanced random access in R8 use different signature subsets, respectively. The signature subset of the enhanced random access in R8 may be further divided into E-DCH resources with a TTI length of 2ms and E-DCH resources with a TTI length of 10ms according to a TTI (Transmission Time Interval) length. When the UE carries out random access, the required resource type is selected, and a corresponding preamble signature is selected to initiate a random access process. When the base station detects the access preamble, the base station performs resource allocation indication through an Acquisition Indicator Channel (AICH) and an Extended Acquisition Indicator Channel (E-AICH), and after receiving the indication, the UE performs uplink transmission using the allocated resources.
When the UE obtains the resource allocation indication, the UE starts uplink transmission by using the allocated resource, sends the identity of the UE to the base station and starts a timer. Before the timer is overtime, if the UE obtains the response of the base station through an Extended Access Grant Channel (E-AGCH), the UE may continue to use the uplink resource, and if the UE does not receive the response of the base station, after the timer is overtime, the UE stops using the uplink resource, and the collision resolution stage is ended.
The UE which obtains the response in the conflict resolution stage uses the distributed uplink E-DCH resource for transmission, after the transmission is finished, the base station can control the UE to release the uplink resource through signaling, and can implicitly release the resource through a mode of scheduling information and a timer.
In the prior art, there is no scheme how the UE selects the E-DCH resource when the UE performs the enhanced random access.
Disclosure of Invention
The embodiment of the invention provides a resource selection method in random access and a terminal device, which can ensure that UE selects proper resources to carry out uplink random access when carrying out enhanced random access.
In one aspect, a specific embodiment of the present invention provides a method for selecting resources in random access, including: user Equipment (UE) acquires at least one parameter of power margin, path loss difference and uplink transmission data volume; and selecting the E-DCH resources of the enhanced dedicated channel according to at least one parameter of the acquired power margin, the path loss difference and the uplink transmission data volume.
In another aspect, a specific embodiment of the present invention provides a terminal device, including: an obtaining unit, configured to obtain at least one parameter of a power margin, a path loss difference, and an uplink transmission data amount; and the selecting unit is used for selecting the E-DCH resource of the enhanced dedicated channel according to at least one parameter of the power allowance, the path loss difference and the uplink transmission data volume obtained by the obtaining unit.
According to the scheme provided by the specific embodiment of the invention, the UE can select the proper E-DCH resource by obtaining at least one parameter of the obtained power margin, the path loss difference or the uplink transmission data volume in the process of enhancing the random access, so that the control of the uplink interference of the UE, the optimization of uplink coverage and the full utilization of the uplink resource can be further realized by performing the uplink access request enhancement on the selected E-DCH resource.
Drawings
Fig. 1 is a flowchart illustrating a resource selection method in random access according to a first embodiment of the present invention;
fig. 2 is a flowchart illustrating a resource selection method in random access according to a second embodiment of the present invention;
fig. 3 is a flowchart illustrating a resource selection method in random access according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a terminal device according to a sixth embodiment of the present invention.
Detailed Description
In order to make the technical solution and the object of the present invention more clear, the following description is further made with reference to the specific embodiments and the accompanying drawings.
Referring to fig. 1, a first embodiment of the present invention is described, which relates to a resource selection method in random access. In this embodiment, the UE selects the E-DCH resource based on a single parameter power margin.
The network side broadcasts the Maximum uplink transmission power Maximum allowed by the UE, the transmission power Primary CPICH TX power of the Primary common pilot channel, the uplink interference UL interference and the Constant Value through a system message, and meanwhile, the Maximum output power P _ MAX of the UE can be obtained according to the type of the UE. The UE may obtain Initial transmit Power Preamble _ Initial _ Power of the random access Preamble according to a parameter obtained by the system message and a CPICH _ RSCP (Common Pilot Channel Received Signal Code Power) measurement result of the UE on the CPICH, and the formula is as follows:
Preamble_Initial_Power=Primary CPICH TX Power-CPICH_RSCP+UL interference+Constant Value
the resource selection method in random access in the embodiment specifically includes:
step 101: the UE obtains a power Margin (Margin).
The power margin is the residual transmitting power obtained by subtracting the actual initial control and data channel transmitting power of the UE from the smaller value of the maximum output power of the UE and the maximum transmitting power allowed by the network.
In this embodiment, the Power margin may be calculated according to the Initial transmit Power Preamble _ Initial _ Power of the random access Preamble:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power,Preamble_Initial_Power+ΔPp-e)}
where Δ Pp-e is a power offset between the access preamble power of the last transmission and the initial DPCCH transmission power.
Further, the power margin may also be obtained according to a Configured service grant Configured _ SG at the network side, where the Configured _ SG includes Default _ SG or Max-SG. The Default _ SG is a Default service grant configured by the network, and may be considered as an initial service grant or a Default service grant for uplink transmission of the UE, and the Max-SG is a maximum service grant configured by the network, that is, a maximum service grant that the network can schedule to the UE, and the power margin may be calculated according to a formula: margin = { min (Maximum allowed UL tx Power, P _ MAX) -MAX (Preamble _ Initial _ Power + Δ Pp-e +10 × log10(1+ Configured _ SG) }
Or, the Power Margin may be further obtained according to an Average service grant Average _ SG of the UE in the random access, where mark = { min (Maximum allowed UL tx Power, P _ MAX) -MAX (Preamble _ Initial _ Power, Preamble _ Initial _ Power + Δ Pp-e +10 log10(1+ Average _ SG) }
The Average _ SG can be calculated according to the buffer status of the last transmitted data. For example, according to the data amount in the data buffer of the RLC (Radio Link Control) layer, the Average resource occupation time of the uplink enhanced access and the Average retransmission times, the Average Transport block size of each TTI, that is, the Average E-TFCI (E-DCH Transport Format Combination Indicator) is estimated, and according to the E-TFCI selection algorithm, the required Average _ SG can be calculated. The transmission power condition required by the uplink transmission data channel can be more accurately reflected through Average _ SG, so that the calculated power margin is more accurate.
In addition to the above method for obtaining the power margin, the UE may further obtain the reference E-TFCI combination for UE random access resource selection broadcasted by the network side through a system broadcast message, and the specific method is as follows:
after receiving a reference E-TFCI issued by a network side, a UE obtains a gain factor beta ed of an E-DPDCH (E-DCH differentiated Physical Data Channel, E-DCH Dedicated Physical Data Channel) and gain factors of an E-DPCCH (E-DCH differentiated Physical Control Channel, E-DCH Dedicated Physical Control Channel), an HS-DPCCH (Dedicated Physical Control Channel for High Speed Downlink Shared Channel) and a DPCCH (Dedicated Physical Control Channel) through parameters configured by a High layer of the network side according to the E-TFCI, wherein the gain factors are respectively betaec、βhsAnd betacThen, the required power margin is calculated according to the following formula: margin = { min (Maximum allowed UL tx Power, P _ MAX) -MAX (Preamble _ Initial _ Power, Preamble _ Initial _ Power + Δ Pp-e +10 × log10(1+ (β))ec/βc)2+∑(βed/βc)2+(βhs/βc)2)}
The power margin obtained by the formula considers the power occupied by the E-DPCCH, the HS-DPCCH and a plurality of E-DPDCH channels under the condition of the reference E-TFCI configured by the UE at the network side. The power occupied by the HS-DPCCH channel is optional, that is, the power occupied by the HS-DPCCH channel may not be considered, and the calculation formula of the power margin may also be expressed as: margin = { min (Maximum allowed ul tx Power, P _ MAX) -MAX (Preamble _ Initial _ Power, Preamble _ Initial _ Power + Δ Pp-e +10 × log10(1+ (β))ec/βc)2+∑(βed/βc)2)}
Step 102: and selecting the E-DCH resource according to the obtained power allowance.
When the UE performs random access, because in R8, the enhanced uplink random access may be divided into E-DCH resources with a TTI length of 2ms and E-DCH resources with a TTI length of 10ms according to the TTI length, the UE needs to obtain effective resources for access.
After the power margin is obtained, if the power margin is larger than or equal to a set threshold value, selecting the E-DCH resource with the length of 2ms TTI; and if the power margin is smaller than a set threshold value, selecting the E-DCH resource with the 10ms TTI length. The threshold value may be configured by the network side, broadcasted by a system message, or predefined.
By the resource selection method in random access provided by the embodiment, the E-DCH resource with the appropriate TTI length can be selected by obtaining the obtained power margin, and thus, the uplink coverage can be optimized by performing the enhanced uplink access request on the selected E-DCH resource, and the control of the uplink interference of the UE and the full utilization of the uplink resource can be further realized.
Referring to fig. 2, a second embodiment of the present invention is described, which relates to a method for enhancing resource selection in random access. In the present embodiment, the UE selects the E-DCH resource based on a single parameter pathloss difference.
Step 201: and obtaining the path loss difference.
And the UE measures the common pilot channels of the source cell and the adjacent cell to obtain the downlink path loss of each cell, and compares the downlink path loss of the source cell with the downlink path loss of the adjacent cell to obtain the downlink path loss difference between the downlink path loss of the source cell and the downlink path loss of the adjacent cell. If the small path loss measurement values from the source cell and the adjacent cell to the UE are closer, the distance difference from the UE to the source cell and the adjacent cell is smaller. Further, when the UE has a plurality of neighboring cells, the obtained plurality of path loss differences may be compared to obtain a minimum path loss difference.
Step 202: and selecting the E-DCH resource according to the obtained path loss difference.
When the obtained path loss difference is smaller than a set threshold value, selecting E-DCH resources with the length of 10ms TTI; and when the path loss difference is larger than or equal to the set threshold value, selecting the E-DCH resource with the TTI length of 2 ms. The set threshold value may be configured by the network side or may be predefined.
Because the position of the UE is closer to the edge of the source cell when the path loss difference is smaller than a certain threshold value, when the data blocks with the same size are transmitted, the power of uplink transmission of the UE by adopting the E-DCH resource with the length of 10ms TTI is lower than the power of uplink transmission of the E-DCH resource with the length of 2ms TTI, and the interference to the adjacent cell is smaller, therefore, when the path loss difference is smaller than the set threshold value, the E-DCH resource with the length of 10ms TTI is selected, otherwise, the E-DCH resource with the length of 2ms TTI is selected.
Further, when there are multiple neighboring cells, the UE may select a suitable E-DCH resource according to the obtained minimum pathloss difference, that is, when the minimum pathloss difference is smaller than a set threshold, the E-DCH resource with the TTI length of 10ms is selected; and when the minimum path loss difference is larger than or equal to a set threshold value, selecting the E-DCH resource with the TTI length of 2 ms.
According to the scheme provided by the embodiment, the position of the UE in the cell is obtained by obtaining the path loss difference, so that the E-DCH resource with the proper TTI length can be selected for enhanced random access, the interference of the UE to the adjacent cell in the process of enhancing uplink access is reduced, and the optimization of uplink coverage and the full utilization of the uplink resource can be further realized.
A third embodiment of the present invention is described below, which relates to a method for enhancing resource selection in random access. In the present embodiment, the UE selects the E-DCH resource according to a single parameter uplink transmission data amount.
Step 301: and acquiring the uplink transmission data volume.
The UE may obtain the uplink transmission data amount according to the data amount in the data buffer of the RLC layer or the buffer occupancy state.
Step 302: and selecting the E-DCH resource according to the obtained uplink transmission data volume.
Then, the UE selects an appropriate resource according to the uplink transmission data amount. And when the uplink transmission data volume, such as the data volume in the data cache or the cache occupation state, is greater than or equal to a set threshold value, selecting the E-DCH resource with the length of 2ms TTI for accessing, and when the uplink transmission data volume is less than the set threshold value, selecting the E-DCH resource with the length of 10ms TTI for accessing. The set threshold value can be configured by a network side and broadcasted through a system message, and can also be predefined.
For example, setting the threshold of the uplink buffer data amount to 1000bytes or the threshold of the uplink data buffer occupancy state to 50%, when the MAC layer of the UE learns that the data amount in the data buffer of the RLC layer is greater than or equal to 1000bytes or the data buffer occupancy state is greater than 50%, controlling the UE to select the 2ms TTI for access, otherwise, selecting the 10ms TTI for access.
According to the scheme provided by the embodiment, the UE can directly select the E-DCH resource with the appropriate TTI length for uplink access by directly selecting the uplink transmission data amount reflected by the data amount in the data buffer or the occupied state of the data buffer, so as to simply and fully utilize the uplink resource, and further realize the control of uplink interference and the optimization of uplink coverage.
In the above embodiment, the UE determines to select an appropriate E-DCH resource according to the obtained specific parameter, i.e., the power margin, the path loss difference, or the uplink transmission data amount. The UE may also determine to select the E-DCH resource according to any two parameters or all three parameters of the power margin, the path loss difference, and the uplink transmission data amount.
A fourth embodiment of the present invention is described below, in which a method for a UE to determine E-DCH resource selection according to two parameters, taking a power margin and a path loss difference as an example.
First, the UE acquires a power margin and a path loss difference. The method of obtaining the power margin and the path loss difference is the same as the method in the above embodiment.
Then, comparing the obtained power margin with a set power margin threshold value, and if the power margin is greater than or equal to the set threshold value, selecting the E-DCH resource with the TTI length of 2 ms; and if the power margin is smaller than a set threshold value, selecting the E-DCH resource with the 10ms TTI length. Comparing the obtained path loss difference with a set path loss difference threshold value, and selecting the E-DCH resource with the TTI length of 2ms when the path loss difference is larger than or equal to the set threshold value; and when the obtained path loss difference is smaller than a set threshold value, selecting the E-DCH resource with the TTI length of 10 ms.
And finally, according to the comparison result, when the two comparison results are that the E-DCH resource with the 2ms TTI length is selected, the UE selects the E-DCH resource with the 2ms TTI length for access, otherwise, the E-DCH resource with the 10ms TTI length is selected for access.
Similarly, in the present embodiment, it is also possible to determine to select an appropriate E-DCH resource in common based on the power margin and the uplink data transmission amount, or to determine to select an appropriate E-DCH resource in common based on the path loss difference and the uplink data transmission amount.
A fifth embodiment of the present invention is described below, in which an E-DCH resource is determined to be selected according to three parameters, namely, a power margin, a path loss difference, and an uplink data transmission amount, and the specific method is as follows:
first, the UE acquires a power margin, a path loss difference, and an uplink data transmission amount.
Then, the UE compares the obtained power margin, the path loss difference, and the uplink data transmission amount, and determines which E-DCH resource of the TTI length is selected under each condition.
And finally, when the judgment result according to the power margin, the path loss difference and the uplink data transmission quantity is that the E-DCH resource with the 2ms TTI length is selected, the UE selects the E-DCH resource with the 2ms TTI length for access, otherwise, the E-DCH resource with the 10ms TTI length is selected for access.
Referring to fig. 4, a sixth embodiment of the present invention is described below with respect to a terminal device. The terminal device 400 includes an obtaining unit 401, configured to obtain at least one parameter of a power margin, a path loss difference, and an uplink transmission data amount; a selecting unit 402, configured to select an enhanced dedicated channel E-DCH resource according to at least one parameter of the power margin, the path loss difference, and the uplink transmission data amount obtained by the obtaining unit 401.
The acquisition unit 401 may include at least one of a first acquisition sub-unit 4011, a second acquisition sub-unit 4012, and a third acquisition sub-unit 4013. The first obtaining sub-unit 4011 is configured to obtain a power margin according to the preamble initial transmit power.
The first obtaining subunit 4011 may obtain the Power Margin according to a formula mark = { min (Maximum allowed UL txpower, P _ MAX) -MAX (Preamble _ Initial _ Power, Preamble _ Initial _ Power + Δ Pp-e) }.
The first obtaining sub-unit 4011 further includes a parameter obtaining sub-unit 4011a, Configured to obtain a Configured service grant Configured _ SG, an Average service grant Average _ SG, or a reference E-DCH transport format combination indicator E-TFCI on the network side; a power margin obtaining subunit 4011b, Configured to obtain a power margin according to the Configured _ SG, the Average _ SG, or the reference E-TFCI obtained by the preamble initial transmit power and parameter obtaining subunit 4011 a.
The Default _ SG obtained by the parameter obtaining subunit 4011a is a Default service grant configured by the network, and may be considered as an initial service grant or a Default service grant for uplink transmission of the UE, and the Max-SG is a maximum service grant configured by the network, that is, a maximum service grant that the network can schedule to the UE. The Average _ SG can be calculated according to the buffer status of the last transmitted data. The reference E-TFCI selected by the UE in the random access resource is obtained by broadcasting through a system broadcast message at the network side.
The second obtaining subunit 4012 is configured to measure a common pilot channel of the source cell and the neighboring cell, obtain a downlink path loss, and compare the downlink path loss of the source cell and the neighboring cell, to obtain a path loss difference. The second obtaining subunit 4012 measures the common pilot channels of the source cell and the neighboring cell to obtain downlink path losses, compares the downlink path loss of the source cell with the downlink path loss of the neighboring cell, and obtains a downlink path loss difference between the downlink path loss of the source cell and the downlink path loss of the neighboring cell; further, if there are multiple neighboring cells, the multiple path-loss differences may be compared to obtain a minimum path-loss difference.
A third obtaining subunit 4013, configured to obtain the uplink transmission data amount according to the data amount in the data buffer of the RLC layer or the buffer occupancy state. The third obtaining sub-unit 4013 obtains the uplink transmission data amount according to the data amount in the data buffer of the RLC layer or the buffer occupancy state.
The selecting unit 402 further includes a selecting subunit 4021, configured to select an E-DCH resource with a transmission time interval TTI length of 2ms when at least one parameter of the power margin, the path loss difference, and the uplink transmission data amount acquired by the acquiring unit 401 is greater than or equal to a set respective threshold; otherwise, E-DCH resources of 10ms TTI length are selected.
By the terminal device provided by the embodiment, the terminal device can select the E-DCH resource with the appropriate TTI length by obtaining the power margin, the path loss difference, or the uplink transmission data amount during the enhanced random access, so that the control of the UE uplink interference, the optimization of the uplink coverage, and the full utilization of the uplink resource can be further realized by performing the enhanced uplink access request through the selected E-DCH resource.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (31)
1. A method for selecting resources in random access is characterized by comprising the following steps:
the user equipment UE obtains a power margin according to the preamble initial transmitting power;
the user equipment selects an enhanced dedicated channel (E-DCH) resource according to the power margin;
wherein, the said user equipment selects enhanced dedicated channel E-DCH resource according to the said power margin, including: when the power margin is larger than or equal to a set threshold value, the UE selects an enhanced dedicated channel E-DCH resource with the length of 2ms transmission time interval TTI; or, when the power margin is smaller than the threshold value, the UE selects the E-DCH resource with the TTI length of 10 ms; the threshold value is broadcasted by the network side through the system message.
2. The method of claim 1, wherein the threshold value is configured by the network side.
3. The method of claim 1, further comprising:
and the user equipment receives the threshold value broadcasted by the network side through the system message.
4. The method of any of claims 1 to 3, wherein the UE obtaining the power margin based on the preamble initial transmit power comprises the UE obtaining the power margin according to the following equation:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power,Preamble_Initial_Power+ΔPp-e)}
wherein, Margin is the Power Margin, Maximum allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, Preamble _ Initial _ Power is the Preamble Initial transmitting Power, and Δ Pp-e is the Power offset between the last transmitted access Preamble Power and the Initial dedicated physical control channel DPCCH transmission Power.
5. The method of any of claims 1 to 3, wherein the UE obtains the power margin according to the preamble initial transmission power, comprising:
the UE obtains the power margin according to the preamble initial transmitting power and the service authorization Configured by the network side, Configured configurable _ SG; or,
the UE obtains the power margin according to the preamble initial transmitting power and the Average service authorization (Average _ SG); or,
and the UE obtains the power margin according to the preamble initial transmitting power and the reference E-DCH transmission format combination indication E-TFCI.
6. The method of claim 5, wherein the UE obtains the power margin according to the preamble initial transmission power and a service grant Configured by the network side, Configured as a Configured _ SG, and wherein the UE obtains the power margin according to the following formula:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power，Preamble_Initial_Power+ΔPp-e+10*log10(1+Configured_SG)}
the method comprises the steps of obtaining a Maximum uplink transmission Power allowed by the UE, determining a Maximum uplink allowed UL tx Power, determining a Preamble _ Initial _ Power, determining a Preamble Initial transmission Power, determining a delta Pp-e, and determining a service authorization Configured by the network side, wherein Margin is the Power Margin, the Maximum uplink allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, the Preamble _ Initial _ Power is the Preamble Initial transmission Power, the delta Pp-e is the Power offset between the last transmitted access Preamble Power and the Initial dedicated physical control channel DPCCH transmission Power, and the Configured _ SG is the service authorization Configured by the network side.
7. The method of claim 5, wherein the UE obtains the power margin according to the preamble initial transmit power and an Average service grant (Average _ SG), comprising the UE obtaining the power margin according to the following formula:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power,Preamble_Initial_Power+ΔPp-e+10*log10(1+Average_SG)}
wherein, Margin is the Power Margin, Maximum allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, Preamble _ Initial _ Power is the leading Initial transmission Power, Δ Pp-e is the Power offset between the last transmitted access leading Power and the Initial dedicated physical control channel DPCCH transmission Power, and Average _ SG is the Average service authorization.
8. The method of claim 5, wherein the obtaining, by the UE, a power margin according to the preamble initial transmit power and the reference E-TFCI is specifically as follows:
the UE obtains gain factors of an E-DCH special physical control channel E-DPCCH, an E-DCH special physical data channel E-DPDCH and a special physical control channel DPCCH according to the reference E-TFCI, wherein the gain factors are respectively betaec、βedAnd betac；
The UE transmits power according to the preamble initial transmission power and the betaec、βedAnd betacAnd obtaining the power allowance.
9. The method of claim 8, wherein the UE initiates the transmit power according to the preamble, wherein the beta is determined according to the preamble initial transmit powerec、βedAnd betacObtaining the power margin, wherein the UE obtains the power margin according to the following formula:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power,Preamble_Initial_Power+ΔPp-e+10*log10(1+(βec/βc)2+∑(βed/βc)2)}
wherein, Margin is the Power Margin, Maximum allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, Preamble _ Initial _ Power is the Preamble Initial transmitting Power, and Δ Pp-e is the Power offset between the last transmitted access Preamble Power and the Initial dedicated physical control channel DPCCH transmission Power.
10. The method of claim 8, wherein the UE further obtains a gain factor β for a high speed downlink shared channel dedicated physical control channel HS-DPCCH according to the reference E-TFCIhs(ii) a The UE transmits power according to the preamble initial transmission power and the betaec、βed、βhsAnd betacAnd obtaining the power allowance.
11. The method of claim 10, wherein the UE initiates the transmit power according to the preamble, wherein the beta is determined according to the preamble initial transmit powerec、βed、βhsAnd betacObtaining the power margin, wherein the UE obtains the power margin according to the following formula:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power,Preamble_Initial_Power+ΔPp-e+10*log10(1+(βec/βc)2+∑(βed/βc)2+(βhs/βc)2)}
wherein, Margin is the Power Margin, Maximum allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, Preamble _ Initial _ Power is the Preamble Initial transmitting Power, and Δ Pp-e is the Power offset between the last transmitted access Preamble Power and the Initial dedicated physical control channel DPCCH transmission Power.
12. A terminal device, comprising:
an obtaining unit, configured to obtain a power margin; the acquiring unit at least comprises a first acquiring subunit, and the first acquiring subunit is used for acquiring a power margin according to the preamble initial transmitting power;
a selecting unit, configured to select an enhanced dedicated channel E-DCH resource according to the power margin obtained by the obtaining unit; the selection unit further comprises a selection subunit; the selection subunit is configured to select an E-DCH resource with a TTI length of 2ms transmission time interval when the power margin acquired by the acquisition unit is greater than or equal to a set threshold; or, the selecting subunit is configured to select an E-DCH resource with a TTI length of 10ms when the power margin acquired by the acquiring unit is smaller than the threshold; wherein, the threshold value is broadcasted by the network side through the system message.
13. The terminal device of claim 12, wherein the threshold value is configured by the network side.
14. The terminal device according to claim 12 or 13, wherein the selecting unit is configured to obtain the power margin according to the preamble initial transmission power, and comprises:
the selection unit is configured to obtain the power margin according to the following formula:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power,Preamble_Initial_Power+ΔPp-e)}
wherein, Margin is the Power Margin, Maximum allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, Preamble _ Initial _ Power is the Preamble Initial transmitting Power, and Δ Pp-e is the Power offset between the last transmitted access Preamble Power and the Initial dedicated physical control channel DPCCH transmission Power.
15. The terminal device according to claim 12 or 13, wherein the first acquiring subunit further comprises:
a parameter obtaining subunit, Configured to obtain a Configured service authorization Configured _ SG, an Average service authorization Average _ SG, or a reference E-DCH transport format combination indicator E-TFCI on the network side;
and the power margin acquiring subunit is used for acquiring the power margin according to the preamble initial transmitting power and the Configured _ SG, the Average _ SG or the reference E-TFCI acquired by the parameter acquiring subunit.
16. The terminal device of claim 15, wherein the power margin obtaining subunit is Configured to obtain the power margin according to the preamble initial transmission power and Configured _ SG obtained by the parameter obtaining subunit, and includes:
the power margin obtaining subunit is configured to obtain the power margin according to the following formula:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power，Preamble_Initial_Power+ΔPp-e+10*log10(1+Configured_SG)}
the method comprises the steps of obtaining a Maximum uplink transmission Power allowed by the UE, determining a Maximum uplink allowed UL tx Power, determining a Preamble _ Initial _ Power, determining a Preamble Initial transmission Power, determining a delta Pp-e, and determining a service authorization Configured by the network side, wherein Margin is the Power Margin, the Maximum uplink allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, the Preamble _ Initial _ Power is the Preamble Initial transmission Power, the delta Pp-e is the Power offset between the last transmitted access Preamble Power and the Initial dedicated physical control channel DPCCH transmission Power, and the Configured _ SG is the service authorization Configured by the network side.
17. The terminal device of claim 15, wherein the power margin obtaining subunit obtains the power margin according to the preamble initial transmission power and the Average _ SG obtained by the parameter obtaining subunit, and includes:
the power margin obtaining subunit is configured to obtain the power margin according to the following formula:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power,Preamble_Initial_Power+ΔPp-e+10*log10(1+Average_SG)}
wherein, Margin is the Power Margin, Maximum allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, Preamble _ Initial _ Power is the leading Initial transmission Power, Δ Pp-e is the Power offset between the last transmitted access leading Power and the Initial dedicated physical control channel DPCCH transmission Power, and Average _ SG is the Average service authorization.
18. The terminal device of claim 15, wherein the power margin obtaining subunit is configured to obtain the power margin according to the preamble initial transmission power and the reference E-TFCI obtained by the parameter obtaining subunit, and includes:
the power margin obtaining subunit obtains an E-DCH dedicated physical control channel E-DPCCH and an E-DCH dedicated physical data channel according to the reference E-TFCIGain factors of E-DPDCH and dedicated physical control channel DPCCH are respectively betaec、βedAnd betac(ii) a According to the initial transmitting power of the preamble and the betaec、βedAnd betacAnd obtaining the power allowance.
19. The terminal device of claim 18, wherein the power margin obtaining subunit is configured to obtain the β from the preamble initial transmission powerec、βedAnd betacObtaining the power margin, including:
the power margin obtaining subunit is configured to obtain the power margin according to the following formula:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power,Preamble_Initial_Power+ΔPp-e+10*log10(1+(βec/βc)2+∑(βed/βc)2)}
wherein, Margin is the Power Margin, Maximum allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, Preamble _ Initial _ Power is the Preamble Initial transmitting Power, and Δ Pp-e is the Power offset between the last transmitted access Preamble Power and the Initial dedicated physical control channel DPCCH transmission Power.
20. The terminal device of claim 18, wherein the power margin obtaining subunit is configured to obtain the power margin according to the preamble initial transmission power and the reference E-TFCI obtained by the parameter obtaining subunit, and includes:
the power margin obtaining subunit is used for obtaining gain factors of an E-DCH special physical control channel E-DPCCH, an E-DCH special physical data channel E-DPDCH and a special physical control channel DPCCH according to the reference E-TFCI, wherein the gain factors are respectively betaec、βedAnd betac(ii) a According to the gain factor beta of the dedicated physical control channel HS-DPCCH of the high-speed downlink shared channelhs(ii) a According to the initial transmitting work of the preambleRatio, said betaec、βed、βhsAnd betacAnd obtaining the power allowance.
21. The terminal device of claim 20, wherein the power margin obtaining subunit is configured to obtain the β according to the preamble initial transmission powerec、βed、βhsAnd betacObtaining the power margin, including:
the power margin obtaining subunit is configured to obtain the power margin according to the following formula:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power,Preamble_Initial_Power+ΔPp-e+10*log10(1+(βec/βc)2+∑(βed/βc)2+(βhs/βc)2)}
wherein, Margin is the Power Margin, Maximum allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, Preamble _ Initial _ Power is the Preamble Initial transmitting Power, and Δ Pp-e is the Power offset between the last transmitted access Preamble Power and the Initial dedicated physical control channel DPCCH transmission Power.
22. A user device, comprising:
a first unit for obtaining a power margin according to a preamble initial transmission power;
a second unit for selecting an enhanced dedicated channel (E-DCH) resource according to the power margin;
the second unit is specifically configured to: when the power margin is larger than or equal to a set threshold value, selecting enhanced dedicated channel E-DCH resources with the length of 2ms transmission time interval TTI; or when the power margin is smaller than the threshold value, selecting the E-DCH resource with the TTI length of 10 ms; the threshold value is broadcasted by the network side through the system message.
23. The UE of claim 22, wherein the threshold value is configured by the network side.
24. The UE of claim 22, wherein the second unit is further configured to receive the threshold value broadcasted by the network side through a system message.
25. The UE of any one of claims 22 to 24, wherein the first unit is specifically configured to obtain the power margin according to the following formula:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power,Preamble_Initial_Power+ΔPp-e)}
wherein, Margin is the Power Margin, Maximum allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, Preamble _ Initial _ Power is the Preamble Initial transmitting Power, and Δ Pp-e is the Power offset between the last transmitted access Preamble Power and the Initial dedicated physical control channel DPCCH transmission Power.
26. The ue according to any one of claims 22 to 24, wherein the first unit is specifically Configured to obtain the power margin according to the preamble initial transmit power and a serving grant Configured _ SG at the network side; or, a device for obtaining the power margin according to the preamble initial transmitting power and an Average service grant Average _ SG; or, obtaining the power margin according to the preamble initial transmitting power and a reference E-DCH transport format combination indication E-TFCI.
27. The UE of claim 26, wherein the first unit is Configured to obtain the power margin according to the preamble initial transmit power and a service grant Configured, Configured by the network side, Conconfigured _ SG, and includes:
the first unit is configured to obtain the power margin by the following formula:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power，Preamble_Initial_Power+ΔPp-e+10*log10(1+Configured_SG)}
the method comprises the steps of obtaining a Maximum uplink transmission Power allowed by the UE, determining a Maximum uplink allowed UL tx Power, determining a Preamble _ Initial _ Power, determining a Preamble Initial transmission Power, determining a delta Pp-e, and determining a service authorization Configured by the network side, wherein Margin is the Power Margin, the Maximum uplink allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, the Preamble _ Initial _ Power is the Preamble Initial transmission Power, the delta Pp-e is the Power offset between the last transmitted access Preamble Power and the Initial dedicated physical control channel DPCCH transmission Power, and the Configured _ SG is the service authorization Configured by the network side.
28. The UE of claim 26, wherein the first unit is configured to derive the power margin according to the preamble initial transmit power and an Average service grant (Average _ SG), and comprises:
the first unit is configured to obtain the power margin by the following formula:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power,Preamble_Initial_Power+ΔPp-e+10*log10(1+Average_SG)}
wherein, Margin is the Power Margin, Maximum allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, Preamble _ Initial _ Power is the leading Initial transmission Power, Δ Pp-e is the Power offset between the last transmitted access leading Power and the Initial dedicated physical control channel DPCCH transmission Power, and Average _ SG is the Average service authorization.
29. The UE of claim 26, wherein the first unit configured to derive the power margin according to the preamble initial transmit power and a reference E-DCH transport format combination indicator (E-TFCI), comprises:
the first unit is configured to determine a reference E-TF according to the reference E-TFThe CI obtains gain factors of E-DCH dedicated physical control channel E-DPCCH, E-DCH dedicated physical data channel E-DPDCH and dedicated physical control channel DPCCH, and the gain factors are respectively betaec、βedAnd betac；
According to the initial transmitting power of the preamble and the betaec、βedAnd betacAnd obtaining the power allowance.
30. The UE of claim 29, wherein the first unit is configured to derive the power margin according to the preamble initial transmit power and a reference E-DCH transport format combination indicator (E-TFCI), and comprises:
the first unit is configured to obtain the power margin by the following formula:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power,Preamble_Initial_Power+ΔPp-e+10*log10(1+(βec/βc)2+∑(βed/βc)2)}
wherein, Margin is the Power Margin, Maximum allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, Preamble _ Initial _ Power is the Preamble Initial transmitting Power, and Δ Pp-e is the Power offset between the last transmitted access Preamble Power and the Initial dedicated physical control channel DPCCH transmission Power.
31. The UE of claim 29, wherein the first unit is further configured to derive a gain factor β for HS-DPCCH based on the reference E-TFCIhs；
The first unit is configured to obtain the power margin by the following formula:
Margin={min(Maximum allowed UL tx power,P_MAX)-max(Preamble_Initial_Power,Preamble_Initial_Power+ΔPp-e+10*log10(1+(βec/βc)2+∑(βed/βc)2+(βhs/βc)2)}
wherein, Margin is the Power Margin, Maximum allowed UL tx Power is the Maximum uplink transmission Power allowed by the UE, P _ MAX is the Maximum output Power of the UE, Preamble _ Initial _ Power is the Preamble Initial transmitting Power, and Δ Pp-e is the Power offset between the last transmitted access Preamble Power and the Initial dedicated physical control channel DPCCH transmission Power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310671695.1A CN103687009A (en) | 2008-04-29 | 2008-04-29 | Resource selection method for random access and terminal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310671695.1A CN103687009A (en) | 2008-04-29 | 2008-04-29 | Resource selection method for random access and terminal device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100670510A Division CN101572944B (en) | 2008-04-29 | 2008-04-29 | Resource selection method in random access and terminal apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103687009A true CN103687009A (en) | 2014-03-26 |
Family
ID=50322961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310671695.1A Pending CN103687009A (en) | 2008-04-29 | 2008-04-29 | Resource selection method for random access and terminal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103687009A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106716895A (en) * | 2015-01-30 | 2017-05-24 | 华为技术有限公司 | Network device, user equipment, and system message transmission method |
| WO2017193809A1 (en) * | 2016-05-13 | 2017-11-16 | 电信科学技术研究院 | Data transmission method, terminal and base station |
| CN109691218A (en) * | 2016-09-15 | 2019-04-26 | 高通股份有限公司 | Method and apparatus for channel reservation |
| WO2019137119A1 (en) * | 2018-01-12 | 2019-07-18 | 华为技术有限公司 | Communication method and device |
| CN113453372A (en) * | 2020-03-25 | 2021-09-28 | 大唐移动通信设备有限公司 | Random access method, base station, user equipment, device and medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007016117A2 (en) * | 2005-08-01 | 2007-02-08 | Interdigital Technology Corporation | Method and apparatus for control of enhanced dedicated channel transmissions |
| CN101098297A (en) * | 2006-06-30 | 2008-01-02 | 大唐移动通信设备有限公司 | Random access method and pilot code extending method |
-
2008
- 2008-04-29 CN CN201310671695.1A patent/CN103687009A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007016117A2 (en) * | 2005-08-01 | 2007-02-08 | Interdigital Technology Corporation | Method and apparatus for control of enhanced dedicated channel transmissions |
| CN101098297A (en) * | 2006-06-30 | 2008-01-02 | 大唐移动通信设备有限公司 | Random access method and pilot code extending method |
Non-Patent Citations (2)
| Title |
|---|
| 3GPP: "《3GPP TS 25.331，V 8.1.0》", 31 December 2007 * |
| MOTOROLA: "《TSG RAN WG1 #36 Tdoc# R1-040229》", 20 February 2004 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106716895A (en) * | 2015-01-30 | 2017-05-24 | 华为技术有限公司 | Network device, user equipment, and system message transmission method |
| CN106716895B (en) * | 2015-01-30 | 2019-10-22 | 华为技术有限公司 | The network equipment, user equipment and system message transmission method |
| WO2017193809A1 (en) * | 2016-05-13 | 2017-11-16 | 电信科学技术研究院 | Data transmission method, terminal and base station |
| US10897761B2 (en) | 2016-05-13 | 2021-01-19 | China Academy Of Telecommunications Technology | Data transmission method, terminal and base station of processing data transmission in different TTI lengths |
| CN109691218A (en) * | 2016-09-15 | 2019-04-26 | 高通股份有限公司 | Method and apparatus for channel reservation |
| WO2019137119A1 (en) * | 2018-01-12 | 2019-07-18 | 华为技术有限公司 | Communication method and device |
| US11160116B2 (en) | 2018-01-12 | 2021-10-26 | Huawei Technologies Co., Ltd. | Communication method and communications apparatus |
| CN113453372A (en) * | 2020-03-25 | 2021-09-28 | 大唐移动通信设备有限公司 | Random access method, base station, user equipment, device and medium |
| CN113453372B (en) * | 2020-03-25 | 2023-08-25 | 大唐移动通信设备有限公司 | Random access method, base station, user equipment, device and medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101572944B (en) | Resource selection method in random access and terminal apparatus | |
| US11672020B2 (en) | Wireless communication system and method of controlling a transmission power | |
| KR101230392B1 (en) | Method and apparatus for selecting enhanced dedicated channel transport format combination in cell_fach state and idle mode | |
| TWI527485B (en) | Method and apparatus for radio link synchronization and power control in cell_fach and idle mode | |
| US20100220623A1 (en) | Method and apparatus for extending coverage for ul transmission over e-dch in idle mode and cell_fach state | |
| JP2018521590A (en) | Over-the-air signaling for increased reuse factor in shared radio frequency spectrum band | |
| JP2011135595A (en) | Radio communication system, and method of controlling downlink transmission power or bit rate | |
| KR20180040137A (en) | Technologies for contention window adjustment for transmissions in the shared radio frequency spectrum band | |
| CN102045823A (en) | Method, system and equipment for controlling power | |
| US20140341155A1 (en) | Transmission Time Interval Selection Method And User Equipment | |
| CN103687009A (en) | Resource selection method for random access and terminal device | |
| US12127262B2 (en) | Wireless communication system and method of controlling a transmission power | |
| GB2472362A (en) | Changing transmission power information regarding a random access channel according to received access delay information | |
| KR101417058B1 (en) | Method and apparatus for the configuration of reception/transmission timing for enhanced uplink service in cell_fach state in mobile communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140326 |
|
| RJ01 | Rejection of invention patent application after publication |