CN1969484A - Method and system for determining a power level for communication in a wireless network - Google Patents
Method and system for determining a power level for communication in a wireless network Download PDFInfo
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- CN1969484A CN1969484A CN 200580020230 CN200580020230A CN1969484A CN 1969484 A CN1969484 A CN 1969484A CN 200580020230 CN200580020230 CN 200580020230 CN 200580020230 A CN200580020230 A CN 200580020230A CN 1969484 A CN1969484 A CN 1969484A
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Abstract
A method for determining a power level for communication in a wireless network is provided. The method includes generating a probe message comprising a power level indicator. The power level indicator corresponds to a particular power level of transmission for the probe message. The probe message is operable to request a base station to provide system access for a mobile station. The probe message is sent to the base station at the particular power level.
Description
Invention field
Present invention relates in general to a kind of wireless network, more particularly, relate to a kind of method and system that is used for the power level of definite communication in wireless networks.
Background technology
It is universal day by day that the use of cell phone and wireless network has become.Such as the wireless network that cellular travelling carriage executive system access procedure is used to serve with access, described service is such as call out initiating, page reply, registration, data burst request or reply, order request or reply, or the like.Basically, no matter when when travelling carriage at it not when must the base station in wireless network sending message under the situation on the Traffic Channel, travelling carriage enters system's access state.
The travelling carriage trial that (over the air) send message that is in operation is known as Access Probe.Travelling carriage is suitable in an Access Probe in each message that sends on the access channel.The set of the Access Probe that sends with cumulative power level is known as Access Probe Sequence.Travelling carriage sends message and reception on access channel or the whole process failing to receive from the response of base station is known as access attempts, and it is made up of several Access Probe Sequences.
Access attempts confirms and finishes the 2nd layer of sent message to receive in the certain hour amount, perhaps to finish based on not receiving for the overtime of the affirmation of the Access Probe Sequence of maximum number.When receiving affirmation from the base station, generally provide travelling carriage institute requested service.
But in conventional wireless network, when travelling carriage wished to ask another service subsequently, whole process accent once more began, and base station and travelling carriage all are not used to any information from previous access attempts.In addition, may for providing helpful, relevant with the access attempts information of better services, the travelling carriage in its overlay area concerning the base station, can not obtain the base station.
Thereby, exist more effective promotion access attempts in the art and provide the demand of the improved wireless network of the information that is used for the base station based on access attempts.Particularly, existence is to the demand of wireless network that such travelling carriage can be provided, this travelling carriage can be used to determine coverage hole by the base station to the base station notice, solve link unbalanced, realize intelligent power control and more promptly set up power level that call out, in successful Access Probe and access attempts number.
Summary of the invention
According to the present invention, the method and system that is used to determine at the power level of communication in wireless networks is provided, eliminate basically or alleviated shortcoming and the problem that is associated with conventional method and system.
In order to solve above-mentioned defective of the prior art, basic purpose of the present invention provides a kind of method of determining at the power level of communication in wireless networks.According to an advantageous embodiment of the invention, this method comprises that generation comprises the probe message of power level indicator.This power level indicator is corresponding to the concrete power level at the transmission of this probe message.This probe message can be used to ask the base station to insert for travelling carriage provides system.Send probe message with this concrete power level to the base station.
According to one embodiment of present invention, receive access parameter messages from the base station, this access parameter messages comprises initial power level and power level increment.
According to another embodiment of the invention, described power level indicator comprises the number of probes of this probe message, and this access parameter messages also comprises maximum number of probes.
According to another embodiment of the invention, receive replying from the base station to this probe message; And provide and the communicating by letter of base station based on this concrete power level.
According to another embodiment of the invention, described probe message comprises automatic repeat request message.
According to another embodiment of the invention, send probe message to a plurality of base stations.
According to another embodiment of the invention, described power level indicator comprises the number of probes of this probe message.
According to another embodiment of the invention, described probe message also comprises coverage area indicator.
According to another embodiment of the invention, described coverage area indicator comprises the access sequence number that can be used to identify the access sequence that is associated with this probe message.
Before the specific embodiment of the present invention below beginning, set forth that the implication of employed specific vocabulary and phrase may be favourable in the whole patent file: term " include (comprising) " and " comprise (comprising) " with and derivative refer to and include but not limited to; Comprising property of term " or (or) ", refer to and/or; In the subclass of the item that term " each " refers at least to be identified each; Phrase " with ... be associated " and " with it ... be associated " and derivative thereof can refer to comprise, be included in ... in, with ... associated, comprise, be comprised in ... in, be connected to or with ... connect, be couple to or with ... couple, can with ... communication, with ... cooperation, staggered (interleave), side by side (juxtapose), with ... approaching, be bound to or with ... bind together, have, have ... attribute or the like; And any equipment, system or its part of at least one operation of term " controller " charge system, such equipment can be realized with hardware, firmware or software or above two combination at least.Should be noted that the function that is associated with any controller can be by centralization or distribution, or Local or Remote ground.Running through patent document provides the definition of specific vocabulary and phrase, though it should be appreciated by those skilled in the art that many be not under the most situation, such definition is applicable to the existing and following use to so defined vocabulary and phrase.
Description of drawings
In order to understand the present invention and advantage thereof more completely, now in conjunction with the accompanying drawings with reference to following description, in the accompanying drawings, similarly label is represented similar part:
The example wireless network that can provide the power level of communication to determine according to the principle of the invention is provided Fig. 1;
Fig. 2 illustrates the example base station that can identify the power of communications level according to the principle of the invention;
Fig. 3 is a flow chart, illustrates the method for power level of determining the communication in wireless networks of Fig. 1 according to the principle of the invention from the visual angle of the base station of Fig. 2;
Fig. 4 illustrates according to the principle of the invention can control example travelling carriage with the power of communications level of base station; And
Fig. 5 is a flow chart, illustrates the method for power level of determining the communication in wireless networks of Fig. 1 according to the principle of the invention from the visual angle of the travelling carriage of Fig. 4.
Embodiment
Following Fig. 1 that discusses is to Fig. 5, and the various embodiment that are used for describing the principle of the invention only as an illustration, should not be interpreted as by any way to limit the scope of the invention.It will be understood by those skilled in the art that and in the wireless network of any suitable layout, to implement the present invention.
The example wireless network 100 that can provide the power of communications level to determine according to the principle of the invention is provided Fig. 1.Wireless network 100 comprises a plurality of cell site 121-123, and each cell site comprises a base station, BS 101, BS 102 or BS 103.Base station 101-103 (that is, CDMA2000) communicates by letter with a plurality of travelling carriages (MS) 111-114 on code division multiple access (CDMA) channel according to for example IS-2000 standard.In advantageous embodiment of the present invention, travelling carriage 111-14 can receive data service and/or speech business simultaneously on two or more CDMA Channel.Travelling carriage 111-114 can be any suitable wireless device (for example, traditional cellular phone, pcs handset, PDA(Personal Digital Assistant) handheld device, mobile computer, remote-measuring equipment) that can communicate by letter with base station 101-103 via Radio Link.
The present invention is not limited to mobile device.The present invention also includes the wireless access terminal of the other types that comprise fixed radio terminal.For simplicity, the back only illustrates and discusses travelling carriage.But, should be appreciated that claim is intended to include real mobile device (for example, cell phone, wireless laptops) and fixing wireless terminal (the machine monitoring device that for example, has wireless capability) with the use that middle term " travelling carriage " is described below.
Be shown in dotted line the approximate boundaries of the cell site 121-123 that base station 101-103 is positioned at.Only cell site is depicted as sub-circular for the purpose of description and interpretation.Should know understanding, depend on selected cell configuration and nature and artificial barrier, cell site can have that other are irregularly shaped.
As known in the art, each of cell site 121-123 is made up of a plurality of sectors, and the directional antenna that wherein is couple to the base station illustrates each sector.The embodiment of Fig. 1 illustrates the base station at center of housing estate.The embodiment that substitutes can be positioned directional antenna in the turning (corner) of sector.System of the present invention is not limited to any particular cell site configuration.
In one embodiment of the invention, each of BS 101, BS 102 and BS 103 comprises base station controller (BSC) and one or more base transceiver subsystem (BTS).Base station controller and base transceiver subsystem are well known to a person skilled in the art.Base station controller is the equipment that comprises the wireless communication resources of base transceiver subsystem for the management of the designated cell in the cordless communication network.Base transceiver subsystem comprises: RF transceiver, antenna and be arranged in other electronics of each cell site.This equipment can comprise air-conditioning unit, heating unit, electric supply, telephone line interface and RF transmitter and RF receiver.For the purpose of simple and clear explanation operation of the present invention, base transceiver subsystem in each of sub-district 121,122,123 and unified respectively by BS 101,102,103 expressions with each base transceiver subsystem associated base station controller.
(mobileswitching center, MSC) 140 at transferring voice and data-signal each other and between public switched telephone networks network (PSTN) (not shown) via order wire 131 and mobile main dispatching centre for BS 101, BS 102, BS 103.BS 101, BS 102, BS 103 also via order wire 131 and packet data server node (packet data server node, PDSN) 150 with internet (not shown) transmission of data signals such as grouped data.(packet control function, PCF) unit 190 is controlled at the data packet flows between base station 101-103 and the PDSN 150 to Packet Control Function.PCF unit 190 may be implemented as PDSN 150 a part, be embodied as the part of MSC 140 or be embodied as the autonomous device of communicating by letter as shown in Figure 1 with PDSN 150.Line 131 also is provided at the access path of the control signal that sends between MSC 140 and BS 101, BS 102, the BS 103, it sets up the voice-and-data circuit between MCS 140 and BS 101, BS 102 and BS 103 connection.
MSC 140 is the switching devices that service are provided and coordinate between wireless network and the subscriber such as the external network of PSTN or internet.MSC 140 well known to a person skilled in the art.In some embodiments of the invention, order wire 131 can be several different data link, and wherein each data link is couple to MSC 140 to one of BS 101, BS 102, BS 103.
In example wireless network 100, MS 111 is arranged in cell site 121, and communicates by letter with BS 101.MS 113 is arranged in cell site 122, and communicates by letter with BS 102.MS 114 is arranged in cell site 123, and communicates by letter with BS 103.MS 112 also locatees the edge that approaches cell site 123, and moves to the direction of cell site 123, as indicated near the direction arrow of MS 112.At certain point, when MS 112 moves in the cell site 123 and shifts out cell site 121, will transfer (hand-off).
According to an advantageous embodiment of the invention, one or more among the travelling carriage 111-114 can provide Access Probe and access sequence information to base station 101-103.Work as travelling carriage, such as travelling carriage 111, in order to initiate such as calling out, page reply, registration, data burst request or reply, order request or the service of replying or the like and when carrying out the system access procedure of access of radio network 100, travelling carriage 111 sends probe message to base station 101 in Access Probe.Should be appreciated that travelling carriage 111 can send probe message to one or more other base stations such as base station 102-103, and does not deviate from scope of the present invention.
If probe message is not identified in the time period of appointment, then travelling carriage 111 increases the power level that is associated with Access Probe, and sends another probe message.If power level reaches maximum, then travelling carriage 111 begins new access sequence by sending probe message in initial power level once more.Travelling carriage 111 continues, and 101 receives the confirmation up to the maximum number that reaches access sequence or from the base station.
When the probe message that produces at each Access Probe, travelling carriage 111 comprises power level indicator in probe message, and can comprise coverage area indicator.For example, travelling carriage 111 can both comprise the number of probes of the current detection that is used for being identified at current access sequence in probe message, also comprised the access sequence number that is used to identify current access sequence.For an embodiment, probe message can comprise automatic repetitive requests (ARQ) message.
Based on travelling carriage 111 employed initial power level and based on the increment size that is used to increase power level in each follow-up Access Probe in sending Access Probe, base station 101 can determine that travelling carriage 111 has sent the power level of successful Access Probe from number of probes.In addition, base station 101 can use access sequence number to determine the position of coverage hole, to solve link unbalanced and more promptly set up and call out.
Fig. 2 illustrates base station (BS) 101 in accordance with the principles of the present invention in more detail.Described in conjunction with Figure 1 as the front, BS 101 comprises base station controller (BSC) 210 and at least one base transceiver subsystem (BTS) 220.The resource that base station controller 210 is managed in the cell site 121 that comprises base transceiver subsystem 220.According to an embodiment, base transceiver subsystem 220 comprises base transceiver subsystem (BTS) controller 225, channel controller 235 (it can comprise at least one element in channel 240), transceiver interface (IF) 245, radio frequency (RF) transceiver unit 250, aerial array 255, power level identifier 260.
BTS controller 225 can comprise can the executable operations program treatment circuit and memory, the overall operation of this operation sequence control base transceiver subsystem 220 and communicate by letter with base station controller 210.Under usual conditions, the operation of BTS controller 225 pilot channel controllers 235, channel controller 235 can comprise a plurality of element in channel, such as element in channel 240, each element in channel can be operated the two-way communication of carrying out on forward channel and the backward channel." forward channel " refers to 101 out-of-bounds to travelling carriage 111 and 112 (outbound) signal from the base station, " backward channel " refer to from travelling carriage 111 and 112 to the base station 101 go into boundary (inbound) signal.Transceiver IF 245 transmits the two-way channel signal between channel controller 240 and RF transceiver unit 250.
The travelling carriage of aerial array 255 in the overlay area of base station 101 sends the forward channel signal that receives from RF transceiver unit 250.Aerial array 255 also can operate the reverse channel signals that the travelling carriage from the overlay area of base station 101 is received to be dealt into RF transceiver unit 250.According to one embodiment of present invention, aerial array 255 comprises multi-sector antenna, such as three fan antennas, wherein each antenna sector be responsible for corresponding near 120 the degree arcs the overlay area in transmission and reception.In addition, RF transceiver unit 250 can comprise the antenna selected cell, is used for selecting among the different antennae of aerial array 255 sending and receive operating period.
For illustrated embodiment, power level identifier 260 can be operated from the probe message that receives from the travelling carriage such as travelling carriage 111 and be extracted power level indicator and coverage area indicator.For example, power level identifier 260 can be extracted number of probes and access sequence number from probe message.For an embodiment, probe message can comprise automatic repetitive requests (ARQ) message.
Based on initial power level and the increment size that is used for increasing power level in follow-up detection, and based on the number of probes of extracting from probe message, power level identifier 260 can determine that travelling carriage 111 has sent the power level of successful Access Probe.In addition, power level identifier 260 can use the access sequence that extracted number to determine the position of coverage hole, to solve link unbalanced and more promptly set up and call out.
Fig. 3 is a diagram according to the flow chart of method 300 that is used for determining wireless network 100 power of communications levels at principle of the invention visual angle of 101 from the base station.In order to explain operation of the present invention simply, the base station (BS) 101 with assumed wireless network 100 in the example below provides service for travelling carriage (MS) 111.But following description also is applicable to remaining base station and the travelling carriage in the wireless network 100.
At first, BS 101 sends access parameter messages (accessparameter message, APM) (treatment step 305) to MS 111 in paging channel.Access parameter messages comprises for MS 111 is attempting inserting the information of BS 101 to ask to use in the service.For example, access parameter messages can comprise the power level increment that is increased of the power level of each the follow-up detection in the initial power level used for MS 111 and the concrete access sequence in initial probe.Access parameter messages can also comprise maximum number of probes and/or maximum access sequence number.
In the time of back, BS 101 receives the detection (treatment step 310) that comprises probe message from MS 111.For an embodiment, probe message can comprise automatic repetitive requests (ARQ) message.Based on the information in the probe message, power level identifier 260 signs of BS 101 have sent the power level (treatment step 315) of this detection from MS 111.For example, power level identifier 260 can be extracted number of probes and access sequence number from this is surveyed.Use the initial power level and the power increment information that are before offered MS111 by BS 101 in access parameter messages, power level identifier 260 can be calculated the transmit power levels of the detection that is received.BS 101 can also be based on the access sequence number next information of determining about the overlay area.
BS 101 begins then with the power level that is identified communicate by letter with MS 111 (treatment step 320).BS 101 can also send the access parameter messages (treatment step 325) that is upgraded to MS 111 based on the power level that is identified.For example, BS 101 can change the initial power level that MS uses into corresponding with the power level that is identified in follow-up detection, to be increased in the chance that success is early surveyed in the access sequence.In addition, BS 101 can number adjust maximum number of probes and/or maximum access sequence.For example, BS 101 can reduce maximum number of probes, so that the final power level before the new detection sequence of beginning keeps identical.
Fig. 4 illustrates travelling carriage 111 according to an embodiment of the invention in more detail.Travelling carriage (MS) 111 is only as example view.But, should be appreciated that, also be the part of travelling carriage 112-114 about MS 111 assemblies illustrated and that describe.MS 111 comprises antenna 405, radio frequency (RF) transceiver 410, transmission (TX) treatment circuit 415, microphone 420, receives (RX) treatment circuit 425, loud speaker 430.MS 111 also comprises primary processor 440, I/O (I/O) interface (IF) 445, keyboard 450, display 455, lag unit (lagging feature, LF) button 458 and memory 460.
According to an embodiment, primary processor 440 can comprise microprocessor or microcontroller.The memory 460 that is couple to primary processor 440 can comprise random-access memory (ram) and/or read-only memory (ROM).Primary processor 440 is carried out the basic operating system program 465 that is stored in the memory 460 so that control the integrated operation of travelling carriage 111.In such operation, the reception of the forward channel signal that primary processor 440 control RF transceivers 410, receiver treatment circuit 425, transmitter treatment circuit 415 carry out and the transmission of reverse channel signals.Primary processor 440 can also other processing and the program of executive resident in memory 460.Primary processor 440 can be according to the needs of carry out handling and to or move into or shift out data from memory 460.
Travelling carriage 111 sends probe message to base station 101 in Access Probe.Should be appreciated that travelling carriage 111 also can send probe message to one or more other base stations such as base station 102-103, and does not deviate from scope of the present invention.
If travelling carriage 111 does not receive the affirmation to probe message in the time period of appointment, then power level controller 470 can be operated increases the power level that is associated with Access Probe.In addition, probe message controller 470 can be operated the probe message of the renewal that generates the number of probes that comprises renewal and access sequence number.Travelling carriage 111 can send the probe message of upgrading to base station 101 then.
In order to begin new detection sequence, power level controller 470 is adjusted power level downwards and is got back to initial power level, and sends the corresponding probe message that is generated by probe message controller 475 with this initial power level.Travelling carriage 111 continues, up to reaching the access sequence maximum number or up to 101 receiving the confirmation from the base station.The same with maximum number of probes, maximum access sequence number can suitably be provided in the communication at access parameter messages or other by base station 101.For another embodiment, can pre-determine maximum access sequence number.
Fig. 5 is that diagram is according to the method 500 of the principle of the invention from the power level that is used for definite wireless network 100 communications at the visual angle of travelling carriage 111.For the purpose of simple and clear explanation the present invention operation, will suppose in the example below that the base station (BS) 101 of wireless network 100 provides service for travelling carriage (MS) 111.But following description also is applicable to remaining base station and travelling carriage in the wireless network 100.
At first, in the MS 111 paging receiving channels from the access parameter messages (APM) (treatment step 505) of BS 101.Access parameter messages comprises for MS 111 is attempting inserting the information of BS 101 to ask to use in the service.For example, access parameter messages can comprise the power level increment that is increased of the power level of each follow-up detection in the initial power level used for MS 111 and the concrete access sequence in initial probe.Access parameter messages can also comprise maximum number of probes and/or maximum access sequence number.
In the time of back, MS 111 decisions are communicated by letter with BS 101 and are prepared to send detection (treatment step 510) to BS 101 based on access parameter messages.MS 111 starts first access sequence (treatment step 515).The probe message controller 475 of MS 111 generates first probe message (treatment step 520) that comprises number of probes and access sequence number then.For an embodiment, probe message can comprise automatic repetitive requests (ARQ) message.For specific embodiment, ARQ message can comprise four bit fields that are used for number of probes and be used for four bit fields of access sequence number.MS 111 sends probe message (treatment step 525) to BS 101 in first surveys.
If do not receive reply (treatment step 530) to surveying from BS 101 in the time period of appointment, then the power level controller 470 of MS 111 determines whether number of probes arrive maximum (treatment step 535).Maximum number of probes can pre-determine, and can be provided in access parameter messages by BS 101, perhaps can otherwise suitably determine.For specific embodiment, maximum number of probes can be 16.
If also do not reach maximum number of probes (treatment step 535), the power level increment that in access parameter messages, provides based on BS 101 of power level controller 470 and increase and be used for MS 111 and send the power level of surveying (treatment step 540) then.Probe message controller 475 also generating another probe message (treatment step 520) before based on the number of probes of upgrading, increases progressively number of probes (treatment step 545).
If reached maximum number of probes (treatment step 535), then power level controller 470 determines whether access sequences number have reached maximum (treatment step 550).Maximum access sequence number can pre-determine, and can be provided in access parameter messages by base station BS 101, perhaps can otherwise suitably determine.For specific embodiment, maximum access sequence number can be 16.
If also do not reach maximum access sequence number (treatment step 550), then probe message controller 475 increases progressively access sequence number (treatment step 555) before at another access sequence of startup (treatment step 515).But if reached maximum access sequence number (treatment step 550), then the failure of the access attempts of MS 111 and this method finish.
If at the appointed time receive reply (treatment step 530) from BS 101 in the section to surveying, then MS 111 then with send this successfully survey in the identical power level of employed power level begin to communicate by letter (treatment step 560) with BS 101.MS 111 can also receive the access parameter messages (treatment step 565) from the renewal of BS 101 of the power level surveyed based on this success, and this method finishes after this.For example, BS 101 can make the initial power level of using for MS 111 into corresponding with the power level of this success detection in surveying future, to be increased in the chance that success is early surveyed in the access sequence.In addition, BS 101 can number adjust maximum number of probes and/or maximum access sequence.For example, BS 101 can reduce maximum number of probes, makes that the final power level before the new access sequence of beginning keeps identical.
Although utilized example embodiment to describe the present invention, those skilled in the art can expect various changes and change.The present invention includes such variation and changes to the scope that falls into claims.
Claims (20)
1. determine method for one kind at the power level of communication in wireless networks, this method be used for can with this wireless network of a plurality of mobile communications in this area of wireless network coverage territory, this method comprises:
Generation comprises the probe message of power level indicator, and this power level indicator is corresponding to the concrete power level at the transmission of this probe message, and this probe message can be used to ask the base station to insert for travelling carriage provides system; And
Send this probe message with this concrete power level to the base station.
2. the method for claim 1 also comprises from the base station receiving access parameter messages, and this access parameter messages comprises initial power level and power level increment.
3. method as claimed in claim 2, described power level indicator comprises the number of probes of this probe message, this access parameter messages also comprises maximum number of probes.
4. the method for claim 1 also comprises: receive replying this probe message from the base station; And based on this concrete power level and base station communication.
5. the method for claim 1, described probe message comprises automatic repeat request message.
6. the method for claim 1 also comprises to a plurality of base stations sending probe message.
7. the method for claim 1, described power level indicator comprises the number of probes of this probe message.
8. the method for claim 1, described probe message also comprises coverage area indicator.
9. method as claimed in claim 8, described coverage area indicator comprise the access sequence number that can be used to identify the access sequence that is associated with this probe message.
10. travelling carriage that can be controlled at the power level of communication in wireless networks, this travelling carriage be used for can with this wireless network of a plurality of mobile communications in this area of wireless network coverage territory, this travelling carriage comprises:
Power level controller can be operated and adjust the power level that is used for sending from travelling carriage message; And
The probe message controller, can operate and generate the probe message that comprises power level indicator, this power level indicator is corresponding to the concrete power level at the transmission of this probe message, this probe message can be used to ask the base station to insert for travelling carriage provides system, and this travelling carriage can be used to send this probe message with this concrete power level to the base station.
11. travelling carriage as claimed in claim 10, described travelling carriage also can be operated the access parameter messages that receives from the base station, and this power level controller also can operate the initial power level that is identified for sending to the base station probe message based on this access parameter messages.
12. travelling carriage as claimed in claim 11, described power level controller also can be operated the next power level increment of determining based on this access parameter messages.
13. travelling carriage as claimed in claim 11, described power level indicator comprises the number of probes of this probe message, and this access parameter messages also comprises maximum number of probes.
14. travelling carriage as claimed in claim 10, described probe message comprises automatic repeat request message.
15. travelling carriage as claimed in claim 10, described power level indicator comprises the number of probes of this probe message.
16. travelling carriage as claimed in claim 10, described probe message also comprises coverage area indicator.
17. travelling carriage as claimed in claim 16, described coverage area indicator comprise the access sequence number that can be used to identify the access sequence that is associated with this probe message.
18. determine method for one kind at the power level of communication in wireless networks, this method be used for can with this wireless network of a plurality of mobile communications in this area of wireless network coverage territory, this method comprises:
Reception is from the probe message of travelling carriage, and this probe message comprises power level indicator, and this power level indicator is corresponding to the concrete power level at the transmission of this probe message, and this probe message can be used to ask the base station to insert for travelling carriage provides system; And
Identify this concrete power level based on this power level indicator.
19. method as claimed in claim 18 also comprises:
Generation comprises the access parameter messages of initial power level and power level increment; And send this access parameter messages to travelling carriage.
20. method as claimed in claim 19, described initial power level is based on this concrete power level.
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| Application Number | Priority Date | Filing Date | Title |
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| US58880904P | 2004-07-16 | 2004-07-16 | |
| US60/588,809 | 2004-07-16 | ||
| US11/123,301 | 2005-05-06 |
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| CN 200580020230 Pending CN1969484A (en) | 2004-07-16 | 2005-07-15 | Method and system for determining a power level for communication in a wireless network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217821B (en) * | 2008-01-17 | 2010-10-06 | 北京北方烽火科技有限公司 | A traveling carriage access method of traveling carriage initiative mobile communication system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101217821B (en) * | 2008-01-17 | 2010-10-06 | 北京北方烽火科技有限公司 | A traveling carriage access method of traveling carriage initiative mobile communication system |
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Open date: 20070523 |