CN101600244B - Wireless communication between base station and mobile device - Google Patents
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- CN101600244B CN101600244B CN2009101458815A CN200910145881A CN101600244B CN 101600244 B CN101600244 B CN 101600244B CN 2009101458815 A CN2009101458815 A CN 2009101458815A CN 200910145881 A CN200910145881 A CN 200910145881A CN 101600244 B CN101600244 B CN 101600244B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The present invention provides a system and a method used for wirelessly communicating between a base station and a mobile device. The base station wirelessly transmits a first or a plurality of overhead messages to the mobile device. The first or the plurality of overhead messages can comprise at least one parameter. The mobile device can wirelessly receive the first or the plurality of overhead messages comprising at least one parameter from the base station. The base station can wirelessly transmit a second or a plurality of messages to the mobile device based on the schedule of the at least one parameter. The mobile device can also wirelessly receive the second or the plurality of messages based on the schedule of the at least one parameter. The mobile device can schedule a sleep cycle based on the at least one parameter thus the battery consumption in the mobile device can be reduced. The second or the plurality of messages can be transmitted less frequently compared with the first or the plurality of overhead messages.
Description
Technical field
The present invention relates to radio communication, more specifically, relate to the system and method for the radio communication between base station and the mobile device.
Background technology
Recently, radio communication has become increasingly extensive.Particularly, for example the use of the mobile device of cellular telephone has become omnipresent.Typical cellular network comprises be used to the macro base station of being convenient to the communication between the mobile device or honeycomb control tower.As the part in various wireless communication standards and the technology, the communication between macro base station and the mobile device typically comprises transmission configuration and other Overhead from macro base station to mobile device.Typically, these Overhead Messages are periodically sent together with predetermined space, in order to keep the up-to-date communication link between mobile device and the macro base station.Mobile device can be operated in " minute crack (slotted) pattern " or " sleep pattern " between time slot, in this pattern, expect these Overhead Messages in order to save battery, and be operated in " waking up " pattern in order in the time slot of expection Overhead Message, receive Overhead Message.Because many Overhead Messages may be that mobile device paging receiving (for example, incoming call) and/or foundation exhalation communication are necessary, the time period that therefore receives Overhead Message is usually relatively short.
Simultaneously, because technology has developed and standard is ripe, so the number of Overhead has increased to allow the possibility of adding and has satisfied various configuration requirements.For example, the development of access point base station or femtocell residential quarter (femtocell) and use may need additional message to send to mobile device from the base station in cellular network.But, send the setup time that more Overhead Message has increased each activation or waken time slot up, these two all can reduce battery life (namely, the less time can be spent in the sleep pattern of saving battery), and increased mobile device and can access cellular network (for example, to set up outgoing call) time quantum before.Thereby, the improvement of expectation this area.
Summary of the invention
Proposed to be used for the embodiment of the system and method for the radio communication between base station and the mobile device.The embodiment that proposes comprises for sending the method for message and the base station apparatus of realizing the method from the base station to mobile device.Described embodiment also comprises for the method for operation mobile device and the mobile device of realizing the method.
Be used for can comprising from the base station to the method for mobile device transmission message: the base station wirelessly sends the first one or more expenses or configuration messages to mobile device.These first one or more expenses (or configuration) message can be crucial to the communication between base station and the mobile device.The first Overhead Message can comprise at least one parameter.
The base station can wirelessly send second one or more message to mobile device according to the program (schedule) based on this at least one parameter.These second one or more message can be not crucial to the communication between base station and the mobile device.The second message can comparatively not be sent out continually than the first message.
Whether the second message can notify mobile device femtocell residential quarter (or access point base station) within the scope of mobile device, for example, can comprise " Access Point Identifier message " and " access point pilot informational message "; The second message also can or replacedly comprise other message, comprises the message irrelevant with the femtocell residential quarter.Mobile device can be dispatched based on this at least one parameter its slotted mode operation or sleep cycle; This can reduce the battery consumption of mobile device.
Several advantages of system and method described herein are the following fact: the second message and the first Overhead Message are sent separately, and comparatively be not sent out continually than the first Overhead Message, and in prior art systems, all message is sent out as single message blocks (for example the first message), and will be sent relatively continually.By message being divided the crucial message of paired communication (perhaps replacedly, sending relatively continually is favourable message) with to communicating by letter not crucial message (perhaps replacedly, can be by the message that does not relatively send continually), and non-critical messages and critical message separated send and comparatively send continually than critical message, the mobile device less time of cost initiatively receives Overhead Message and Reconfigurations information.In other words, comparatively do not send continually not crucial message and cause less overhead message.
Therefore, mobile device can spend the more time in " sleep " pattern (saving battery) and also can send quickly message (raising performance).
Be used for to be realized by base station apparatus from the base station to the method for mobile device transmission message.For example, in one embodiment, this base station apparatus can comprise at least one antenna and the logical circuit that is couple to this antenna.This logical circuit can be realized aforesaid method.
The method that is used for the operation mobile device can comprise: this mobile device receives the first one or more expenses or configuration messages from base station radio ground.These first one or more expenses (or configuration) message can be crucial to the communication between base station and the mobile device.The first Overhead Message can comprise at least one parameter.This mobile device also can wirelessly receive according to the program based on this at least one parameter second one or more message.These second one or more message can be not crucial to the communication between base station and the mobile device.The second message can comparatively not be sent out continually than the first message.
Whether the second message can notify mobile device femtocell residential quarter (or access point base station) within the scope of mobile device, for example, can comprise " Access Point Identifier message " and " access point pilot informational message "; The second message also can or replacedly comprise other message, comprises the message irrelevant with the femtocell residential quarter.Mobile device can be dispatched based on this at least one parameter its slotted mode operation or sleep cycle; This can reduce the battery consumption of mobile device.
The method can comprise and the similar advantage of said method.In other words, receive the second message and comparatively do not receive continually the second message than the first message by separating with the first message, mobile device can spend more its slotted mode in " sleep " time slot (saving battery), and also can send quickly message (raising performance).
The method that is used for the operation mobile device can be realized by the mobile device device.For example, in one embodiment, this mobile device device can comprise at least one antenna and the logical circuit that is couple to this antenna.This logical circuit can be realized aforesaid method.
Description of drawings
When describing preferred embodiment in detail by reference to the accompanying drawings, can obtain the present invention is better understood, wherein:
Fig. 1 illustrates the example communications system according to an embodiment;
Fig. 2 is the flow chart that illustrates according to the method for message that sends to mobile device from the base station of an embodiment;
Fig. 3 is the flow chart that illustrates according to the method that is used for the operation mobile device of an embodiment;
Fig. 4 illustrates the sequential according to the message that sends from the base station to mobile device of an embodiment.
Although be easy to the present invention is made various modifications and replaceable form, show for example in the accompanying drawings its specific embodiment and will be described in greater detail here.But, should be appreciated that, the accompanying drawing here and describe and should not limit the invention to disclosed concrete form, on the contrary, the present invention falls into all modifications, equivalent and substitute mode in the spirit and scope of the present invention that appended claims limits with covering.
Embodiment
Term
The below is the used nomenclature of the application:
Any in storage medium-polytype memory device or the storage facilities.Term " storage medium " is intended to comprise: medium is installed, for example, CD-ROM, floppy disk or tape unit; Computer system memory or random access memory, such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM etc.; Or nonvolatile memory, such as magnetizing mediums or the light storage of for example hard disk drive.Storage medium can also comprise memory or its combination of other types.In addition, storage medium can be arranged in the first computer of executive program, maybe can be arranged in via such as the network connection of the internet different second computer to the first computer.In a rear situation, the program command that second computer can be provided for carrying out to the first computer.Term " storage medium " can comprise two or more storage mediums that are positioned at diverse location, for example is arranged in the different computer by network connection.
Programmable hardware element-comprise that various hardware devices, this hardware device comprise a plurality of programmable function blocks that connect by programmable interconnect.Example comprises field programmable gate array (FPGA, FieldProgrammable Gate Arrays), Programmable Logic Device device (PLD, Programmable LogicDevice), field-programmable Target Aerial Array (FPOA, Field Programmable Object Array) and complex programmable logic device device (CPLD, Complex Programmable Logic Device).The programmable functions module can not wait to coarse granules such as ALU or processor cores from fine particles such as combinational logic circuit or look-up table.Also programmable hardware element can be called " reconfigurable logic circuit ".
Any in computer system-polytype calculating or the treatment system comprises the combination of personal computer system (PC), large computer system, work station, the network equipment, internet equipment, personal digital assistant (PDA), television system, computing system or miscellaneous equipment or equipment.Usually, term " computer system " broadly can be defined as to contain and have at least one and carry out from any equipment of the processor of the instruction of storage medium or the combination of equipment
Fig. 1-example communications system
Fig. 1 shows example communications system, is included in the macro base station 100 of service, a plurality of access point base station 170 that service is provided in regional area 175 and a plurality of mobile device 150 (being also referred to as " mobile radio station " or " accessing terminal ") are provided in grand regional 105.
Term " access point base station " is intended to comprise that those skilled in the art understand for femtocell residential quarter, base station from home, individual access point (PAP, personal access point) and the individual second generation-third generation or the n typical definition for base station etc.Similarly, term " macro base station " is intended to comprise that those skilled in the art understand for the cell phone control tower that service is provided and the typical definition of base station in grand zone.Term " base station " according to the access point base station in the middle of the base station that requires to be intended to comprise other kind and macro base station the two.Thereby, the base station can comprise at least one antenna that sends and/or receive wireless signal, and the logic that is used for carrying out various signal correlation function (for example below with reference to Fig. 2 and 3 described) (for example, processor and storage medium, application-specific integrated circuit (ASIC) (ASIC) or programmable hardware element, and the analog or digital logic of other form).
Mobile device (be also referred to as and access terminal) 150 can comprise the equipment that can be used for such as any type of the cellular network of radio communication.Mobile device can comprise cellular telephone (comprising intelligent telephone set), have any equipment that can communicate with cellular network of the personal digital assistant (PDA) of mobile communication ability, the laptop computer with mobile communication assembly or computer system and/or other.Mobile device also can comprise at least one antenna that sends and/or receive wireless signal, and the logical circuit that is used for carrying out various signal correlation function (for example below with reference to Fig. 2 and 3 described) (for example, processor and storage medium, application-specific integrated circuit (ASIC) (ASIC) or programmable hardware element, and the analog or digital logical circuit of other form), its similar with above-mentioned base station (although usually not identical).This mobile device can use various agreement, such as CDMA 2000 (first generation RTT and EV-DO), UMB, UMTS, LTE, WiMax or other agreement.Correspondingly, base station 100 and 170 can support agreement that mobile device is used any one or these agreement at least one subset and need not revise these standards or the agreement of supporting existing mobile device.
Fig. 2 and 3-are used for sending the method for message and being used for operating mobile establishing from the base station to mobile device
Standby method
Fig. 2 illustrates the method that sends message from the base station to mobile device according to an embodiment.Fig. 3 is the flow chart that illustrates according to the method that is used for the operation mobile device of an embodiment.The method that is used in Fig. 2 and 3 can combinedly be used in certain embodiments, and is as described below.Can wirelessly communicate by letter with mobile device in the base station, for example the base station is come to receive signal to another mobile device transmitted signal or from another mobile device with antenna.Notice that with reference to figure 1 the two can comprise base station and mobile device at least one antenna that sends and/or receive signal and for the logical circuit of carrying out various signal correlation function, and is as described below.According to the relative signal intensity of any base station in the scope of the position of mobile device and mobile device, this base station can be macro base station or access point base station.Replacedly, this base station can be the base station of any type.
In certain embodiments, the normal operation of mobile device can comprise " slotted mode ".In slotted mode, mobile device can be used for different activities with different particular time-slots.For example, one or more assigned timeslots can be arranged for receiving some message and/or being used for sending some message.When mobile device is not in the time slot of these activation one, can enter " sleep pattern " or circulation to save battery.In certain embodiments, time slot can be based on system clock, for example, and synchronously at mobile device and the base station of with it communication and/or the clock of the operation between the cellular network under it.
In step 202, the base station sends first one or more Overhead Messages to mobile device, comprises at least one parameter.In step 302, mobile device receives first one or more Overhead Messages from the base station, comprise at least one parameter.In certain embodiments, the first one or more Overhead Messages that sent by the base station can be the identical one or more Overhead Messages that received by mobile device, for example, comprise at least one identical parameter.
First one or more Overhead Messages can comprise the configuration messages from the base station to the mobile device.These expenses or configuration messages can comprise the information to the communication key between base station and the mobile device, for example, and according to the communication protocol of just using.If do not have the crucial information of these communications, possibly can't set up communication between base station and the mobile device.In certain embodiments, first one or more Overhead Messages can also comprise paging information, for example, can notify the mobile device incoming communications, and for example Inbound Calls is called out.Thereby first one or more Overhead Messages can be sent (for example, per 1.25 seconds once) relatively continually, so that mobile device can not miss incoming call.According to an agreement, first one or more Overhead Messages can comprise one or more in following: " system parameters message " comprises longitude and latitude of for example identifying information of base station (for example base station IDs), base station etc.; " CDMA Channel tabulation " comprises for example tabulation of the operable code division multiple access of mobile device (CDMA) channel; " neighbor list messages " comprises the tabulation of the adjacent base station in the scope that for example also is in mobile device; " system parameters message of expansion " comprises for example spare system parameter, for example can be used for dispatching than the first Overhead Message at least one parameter of received second one or more message continually not comparatively.Except above-mentioned message or replace above-mentioned any message, many other message also are possible; It should be noted that also in the above-mentioned message any one can also comprise except above-mentioned information or replace the out of Memory of above-mentioned information.
In step 204, the base station sends second one or more message according to the program based on this at least one parameter to mobile device.In step 304, mobile device receives second one or more message according to coming based on the program of this at least one parameter from the base station.With identical in step 202 and 302, can be identical message in second one or more message of step 204 in 304.Thereby the base station can be dispatched based on the parameter that sends in the first message and be sent the second message, and mobile device can calculate the time that the second message is scheduled and arrives based on the parameter that receives in the first message simultaneously.
In certain embodiments, these second one or more message can be not crucial to the communication between base station and the mobile device.If do not have the crucial information of these communications, still can set up communication between base station and the mobile device.But in other embodiments, second one or more message can be crucial to the communication between base station and the mobile device also, but can not need simply to be sent out so continually (for example, upgrading) as first one or more Overhead Messages.In general, if second one or more message from the base station transmission to mobile device so frequent unlike the first transmission of one or more Overhead Messages from the base station to the mobile device, then send second one or more message and will obtain some benefits.
If second one or more message send so continually unlike first one or more Overhead Messages, then mobile device can not need to spend and the time that initiatively receives first one or more Overhead Message as much, as second one or more message are included in first one or more Overhead Messages.This will allow mobile device with information (for example just to begin in the near future, in order to set up outgoing telephone call or other communication of breathing out) send it back base station (for example, needing among the embodiment of first current one or more Overhead Messages that will be updated or before it can be sent out at mobile device).This also will allow mobile device before being scheduled for the next time slot that receives first one or more Overhead Messages, and the time that cost is grown is in sleep pattern.Particularly, if according to based on known parameters (for example, be included in the parameter in the first Overhead Message) program sending and receiving second one or more message, then mobile device can at least part ofly be dispatched sleep cycle (its slotted mode operation) based on this parameter.This can allow mobile device to distribute the maximum time to sleep pattern, still receives all message and paging simultaneously from the base station.Thereby, comparatively do not send continually second one or more message, send second one or more message according to the program based on the scheduling parameter of utilizing the first message to send particularly, can improve battery life and the performance of mobile device.
In certain embodiments, second one or more message can be the message relevant with access point base station.For example, in one embodiment, second one or more message can comprise the message (referred to herein as " access point pilot informational message ") that whether has access point base station in the scope of identifying mobile device, and the message (referred to herein as " Access Point Identifier message ") of the access point base station (if present) in the scope of identification mobile device.Thereby such message can support the use as the access point base station of the part of cellular network, improves potentially the signal of the mobile device in the cellular network and/or increases the scope of mobile device.But it can send these message to mobile device continually as sending configuration messages (for example first one or more Overhead Messages), thereby they can be suitable for being included in second one or more message.Other message (for example, comprising not necessarily relevant with access point base station message) also can be used as the part of second one or more message or replacedly is sent out.The example of such message is other contiguous communication technology base station inventory message of " OtherTechnologyNeighborList ", and it for example can comprise the base station of the agreement that mobile device in the scope from mobile device is different and/or serve relevant information.Thereby for example, if mobile device is worked according to CDMA20001xRTT, then this message can be notified mobile device, has the GSM base station in the scope of mobile device.
Wherein the second message is only among the embodiment relevant with some mobile device (for example, if they relate to optional or restrictive service) at some, and separately the second message can also be favourable to those mobile devices that can not or not use the second message.For example, if the second message is relevant with access point base station, then configuration does not use any mobile device of access point base station can ignore the second message fully, thereby provides than further battery saving of prior art situation (wherein all Overhead Messages are sent in single message blocks together).
As mentioned above, second one or more message can be sent by the base station according to the program based at least one parameter.In certain embodiments, program also can be based on system clock, and for example mobile device and base station can according to the work of public system time, wherein send the frame of information, for example every 20ms, 80ms or other interval with specific interval.In an example embodiment, the formula that is used for the time of definite transmission second one or more message is:
T?mod(APM_Period)＝0
In this example, T is the time take system time as unit, and:
APM_Period＝2
APM_PeriodIndex?x16
Wherein APM_PeriodIndex is included in first one or more Overhead Messages, for example in the system parameters message of above-mentioned expansion.In a particular embodiment, APM_PeriodIndex can be 4, and T can be 80ms.Thereby in this example, after per 20.48 seconds, the base station can send second one or more message to mobile device.As previously mentioned, this compared with the 1.25 seconds typical cycles (although other cycle also is possible) that are used for first one or more message; Thereby as seen in this specific embodiment, the second message comparatively is not sent out continually than the first message.But although should be noted that this specific formulation that is used for scheduling second one or more message is a kind of mode that realizes this step, being based at least one parameter, to dispatch the alternate manner of second one or more message also be predictable.
Fig. 4-message time sequence figure
Fig. 4 illustrates according to first one or more Overhead Messages of an embodiment and the relative timing of second one or more message.Mobile device can be operated in " slotted mode ", and wherein, it only is (and being in high energy use state) of activating during designated some time slot for transmission or receipt message.In remaining time slots, mobile device can be in low energy and use state (for example, being in sleep cycle).Thereby, mobile device can designated for the time slot of first one or more (expense) message during " waking up ", and turn back to sleep cycle when message is received when all first (expenses).(can be determined based on the parameter that sends in the first message) be the time after a while, and mobile device can " wake up " to receive second one or more message again.Replacedly, if the second message is not relevant with mobile device, then mobile device can continue its sleep cycle during the time slot of the second message, thereby the additional increase of battery life is provided.For example, in one embodiment, second one or more message can be the access point base station related news.In this case, only be configured to utilize the mobile device of access point base station will need to receive the second message; Any other mobile device can not use the second message.Except the access point base station related news (or replacing), the second message also can comprise the message of any kind; In other words, they to be not limited to be the access point base station related news.
Every kind of message (for example, the first message and the second message) can be sent (and reception) periodically according to the cycle separately.The cycle of the first and second message can be correlated with, and for example, they can be all based on common parameter.In certain embodiments, the second message can comparatively not be sent out continually than the first message; For example, as shown in the figure, the transmission frequency of the second message can be half of transmission frequency of the first message.In other embodiments, the second message can the transmission of the first message per 4,8,10,16 or doubly be sent out once arbitrarily.In alternative embodiment, the second message can be sent out equally continually with the first message.Be sent out although also it should be noted that the integral multiple that the second message was shown as according to cycle of the first message, other relation between the cycle of the cycle of the first message and the second message also is possible.Although it shall yet further be noted that in certain embodiments, the second message quantitatively and/or the duration upper little than the first message, the duration that more the second message of the first message and/or the second message are compared in existence can also be possible than the first message length.
Although the above has described embodiment in detail very much, in case above-mentioned disclosing understood fully, then for a person skilled in the art, many variations and modification will become obvious.Be intended to following claims and be understood to contain all such variation and modifications.
Claims (11)
1. one kind is used for from the base station to the method for mobile device transmission message, and the method comprises:
Send first Overhead Message to this mobile device with wireless mode by this base station, wherein this first Overhead Message comprises at least one scheduling parameter; And
Send second message to this mobile device with wireless mode by this base station, the step of wherein said transmission the second message is to carry out according to the program of determining based on this at least one scheduling parameter;
Wherein this second message comparatively is not sent out continually than the first Overhead Message, wherein the connection of this second message and femtocell residential quarter and identify relevant.
2. base station that is configured to wirelessly send to mobile device message, wherein this base station comprises:
Be used for wirelessly sending to this mobile device the parts of the first Overhead Message, wherein this first Overhead Message comprises at least one scheduling parameter; And
Be used for the program determined according to based on this at least one scheduling parameter, wirelessly send the parts of the second message to this mobile device,
Wherein this second message comparatively is not sent out continually than the first Overhead Message, wherein the connection of this second message and femtocell residential quarter and identify relevant.
3. method that is used for the operation mobile device, the method comprises:
Receive the first Overhead Message by this mobile device with wireless mode, wherein this first Overhead Message comprises at least one scheduling parameter, and wherein this first Overhead Message receives from the base station;
Receive second message according to the program of determining based on this at least one scheduling parameter with wireless mode by this mobile device, wherein the second message is comparatively more not received continually than the first Overhead Message, wherein the second message receives from the base station, wherein the connection of this second message and femtocell residential quarter and identify relevant; And
Dispatch sleep cycle by this mobile device based on this at least one scheduling parameter, thereby reduce battery consumption.
4. method as claimed in claim 3,
Wherein whether within the scope of this mobile device, wherein this second message comprises this this mobile device of the second message informing about this femtocell residential quarter: 1) Access Point Identifier message, indicate the identifier of this femtocell residential quarter; With 2) the access point pilot informational message, indicate the pilot frequency information of this femtocell residential quarter.
5. method as claimed in claim 3,
Wherein this sleep cycle is relevant with the access parameter messages periodic key that is included in this at least one scheduling parameter with system time.
6. method as claimed in claim 5,
Wherein this sleep cycle be confirmed as T mod (APM_Period)=0 and
APM_Period＝2
APM_PeriodIndex?x16
Wherein T is the time take system time as unit, and APM_PeriodIndex represents the access parameter messages periodic key.
7. method as claimed in claim 3,
Wherein this first Overhead Message comprises the Overhead Message to the communication key between base station and the mobile device, and wherein this second message comprises the message not crucial to the communication between base station and the mobile device.
8. one kind is configured to from the mobile device of base station radio ground receipt message, and wherein this mobile device comprises:
Be used for receiving from this base station radio ground the parts of the first Overhead Message, wherein this first Overhead Message comprises at least one scheduling parameter;
Be used for receiving from this base station radio ground according to the program of determining based on this at least one scheduling parameter the parts of the second message, wherein the second message is comparatively more received continually than the first Overhead Message, wherein the connection of this second message and femtocell residential quarter and identify relevant; And
Thereby be used for reducing based on this at least one scheduling parameter scheduling sleep cycle the parts of battery consumption.
9. mobile device as claimed in claim 8,
Wherein whether within the scope of this mobile device, wherein this second message comprises this this mobile device of the second message informing about this femtocell residential quarter: 1) Access Point Identifier message, indicate the identifier of this femtocell residential quarter; With 2) the access point pilot informational message, indicate the pilot frequency information of this femtocell residential quarter.
10. mobile device as claimed in claim 8,
Wherein this sleep cycle is relevant with the access parameter messages periodic key that is included in this at least one scheduling parameter with system time, and wherein this sleep cycle is confirmed as T mod (APM_Period)=0 and APM_Period=2
APM_PeriodIndexX16, wherein T is the time take system time as unit, wherein APM_PeriodIndex represents the access parameter messages periodic key.
11. mobile device as claimed in claim 8,
Wherein this first Overhead Message comprises the Overhead Message to the communication key between base station and the mobile device, and wherein this second message comprises the message not crucial to the communication between base station and the mobile device.
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| US14598009P | 2009-01-21 | 2009-01-21 | |
| US61/145,980 | 2009-01-21 |
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