CN101227353B - System and method for sending down control parameter when hard handing off connected state among access networks - Google Patents
System and method for sending down control parameter when hard handing off connected state among access networks Download PDFInfo
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- CN101227353B CN101227353B CN2007100011665A CN200710001166A CN101227353B CN 101227353 B CN101227353 B CN 101227353B CN 2007100011665 A CN2007100011665 A CN 2007100011665A CN 200710001166 A CN200710001166 A CN 200710001166A CN 101227353 B CN101227353 B CN 101227353B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0066—Transmission or use of information for re-establishing the radio link of control information between different types of networks in order to establish a new radio link in the target network
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Abstract
The invention discloses a method for sending down a control parameter during hard switch of connected-state in an access network, which is used to solve the problems that when the hard switch of connected-state in the access network is in the prior art, a resource access network can not send down RA Channel Gain parameter to lead a user terminal can not control reversed power and the like. The method comprises: utilizing the resource access network where the user terminal is placed to obtain reversed activity communication channel gain RA Channel Gain parameter from a target access network, and assigning TCA information which carries the RA Channel Gain parameter through a business communication channel and sending down to the user terminal. The invention simultaneously discloses an access network and a communication system.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the method and system of sending down control parameter when hard handing off connected state among access networks.
Background technology
In CDMA 2000 HRPD Radio Transmission Technology version A (CDMA20001xEV-DORev.A) system; Access Network (Access Network; When carrying out the connected state direct-cut operation AN), the source Access Network is to user terminal (Access Terminal, AT) issuing service channel assignment message (TrafficChannel Assignment; TCA), Access Network switches to target access network to indicating user terminal from the source.Control Parameter in the said TCA message is taken the source Access Network by target access network to through the A16 signaling, the Control Parameter that the source Access Network provides according to the A16 signaling, and filling issues TCA message and switches to target access network with indicating user terminal.
Consult shown in Figure 1ly, the handling process when user terminal carries out the connected state direct-cut operation between Access Network is following:
Step 100, user terminal and source Access Network connect, and get into state of activation.
Step 101, source Access Network send the A16 session to target access network and transmit request message (A16-SessionTransfer Request), and request switches to target access network with user terminal.Wherein, said A16 session transmit all session state information of comprising active Access Network in the request message (Session StateInformation, SSI), and all configuring negotiation parameters of user terminal Access Network in the source.
Step 102, target access network are accepted the A16 session transmission request that the source Access Network sends, and return the A16 session to the source Access Network and transmit response message (A16-Session Transfer Response).Wherein, said A16 session is transmitted in the response message and is included Control Parameter.
Step 103, source Access Network are transmitted response message and are formed TCA message and issue this TCA message to user terminal according to receiving A16 session that target access network returns, and indicating user terminal switches to target access network by the source Access Network.
Step 104, source Access Network send the A16 session to target access network and transmit completion message (A16-SessionTransfe Complete), and the notification target Access Network switches to be carried out.
Step 105, user terminal switch to target access network by the source Access Network.
The A16 interface does not support to carry in the message transmitted Reverse Activity degree channel gain parameter (RA Channel Gain) in the Control Parameter in the prior art, and this RA Channel Gain parameter is used for the transmitting gain of the RA Channel of informing user terminal Access Network.User terminal comes demodulation Reverse Activity degree channel bit RAB through RA Channel Gain parameter, through the reverse load of the current access of RAB value acquisition sector, to carry out reverse power control.Owing to transmit in the response message to the A16 session that the source Access Network returns at target access network; Do not comprise said RA Channel Gain parameter; Therefore; The source Access Network can't get access to the RA Channel Gain parameter of target access network, and then can't issue RA Channel Gain parameter to user terminal.User terminal can't carry out reverse power control when not obtaining RA Channel Gain parameter.This moment, reverse power control was in no-console condition, and this will cause entire system power soaring suddenly, and the border a large number of users falls net, causes the serious decline of overall system capacity and performance.
In addition; Because the source Access Network determines whether to carry the subsequent control parameter according to whether carrying RA ChannelGain parameter in the TCA message in the prior art; Said subsequent control parameter comprises MAC sequence number high order bit (MAC Index MSB), data source control channel parameter DSC, data source control channel gain parameter (DSC Channel Gain Base); Wherein, said MAC Index MSB parameter is used for user terminal demodulation forward direction MAC bag; Control data transmission was not interrupted when said DSC parameter was used for the DOA virtual soft; Said DSC Channel Gain Base parameter is used to control the transmitting power of user terminal on DSC Channel channel.When the source Access Network does not comprise RAChannel Gain parameter in the TCA message that user terminal issues; With further causing the subsequent control parameter in the TCA message can not be issued to user terminal, thus can't demodulation forward direction MAC bag, can't be when the DOA virtual soft control data transmission do not interrupt, the transmitting power of uncontrollable user terminal on DSC Channel channel.
Summary of the invention
The embodiment of the invention provides a kind of method and system of sending down control parameter when hard handing off connected state among access networks; So that user terminal is when carrying out the connected state direct-cut operation between Access Network, the source Access Network can carry RA Channel Gain parameter and be issued to user terminal through Traffic Channel Assignment TCA message; Carry MAC layer sequence number, for example high order bit, data source control channel parameter and data source control channel gain parameter one of them or combination in any and be issued to user terminal through Traffic Channel Assignment TCA message.
The present invention provides following technical scheme:
A kind of method of sending down control parameter when hard handing off connected state among access networks; The source Access Network at user terminal place obtains Reverse Activity degree channel gain RA Channel Gain parameter from target access network, carries said RA Channel Gain parameter and is issued to user terminal through Traffic Channel Assignment TCA message.
A kind of method of sending down control parameter when hard handing off connected state among access networks; The source Access Network at user terminal place confirm to comprise in the Traffic Channel Assignment TCA message in MAC layer sequence number, for example high order bit field, data source control channel parameter field and the data source control channel gain parameter field the part field or all during field, carry corresponding field and be issued to user terminal through said TCA message.
A kind of access network comprises:
Communication unit is used for communicating with user terminal and other Access Network;
Processing unit is used for carrying the RA Channel Gain parameter that said communication unit gets access to from target access network through Traffic Channel Assignment TCA message, and indicates said communication unit to issue said TCA message to said user terminal.
A kind of access network comprises:
Communication unit is used for communicating with user terminal and other Access Network;
Processing unit; Be used for confirm Traffic Channel Assignment TCA message comprise in MAC layer sequence number, for example high order bit field, data source control channel parameter field and the data source control channel gain parameter field the part field or all during field, carry corresponding field and indicate said communication unit to issue said TCA message to said user terminal through said TCA message.
A kind of communication system comprises:
A plurality of Access Networks; Be used for user terminal is linked into network; Wherein, When said user terminal carries out the connected state direct-cut operation between source Access Network and target access network, obtain Reverse Activity degree channel gain parameters R A Channel Gain by said source Access Network from target access network, carry said RA Channel Gain parameter and be issued to said user terminal through Traffic Channel Assignment TCA message.
A kind of communication system comprises:
A plurality of Access Networks; Be used for user terminal is linked into network; Wherein, When said user terminal carries out the connected state direct-cut operation between source Access Network and target access network; Said source Access Network carries corresponding field and issues said TCA message to said user terminal through said TCA message after in confirming Traffic Channel Assignment TCA message, comprising the part field or whole field in MAC layer sequence number, for example high order bit field, data source control channel parameter field and the data source control channel gain parameter field.
In the embodiment of the invention; The source Access Network obtains Reverse Activity degree channel gain RA Channel Gain parameter through the A16 interface from target access network; Make and follow-uply can carry RA Channel Gain parameter and be issued to user terminal through TCA message; And then make user terminal carry out reverse power control according to RA Channel Gain parameter, guarantee the capacity and the performance of whole system; In addition; In the embodiment of the invention; The source Access Network is under the situation that does not get access to RA Channel Gain parameter; Yet can carry MAC layer sequence number, for example high order bit, data source control channel parameter and data source control channel gain parameter one of them or combination in any and be issued to user terminal, thereby make the user terminal can demodulation forward direction MAC bag, and control data transmission not be interrupted when the DOA virtual soft through TCA message; And, the transmitting power of control user terminal on the DSCChannel channel.
Description of drawings
Process chart when Fig. 1 carries out the connected state direct-cut operation for user terminal in the background technology between Access Network;
Fig. 2 is the structural representation of communication system in the embodiment of the invention;
Fig. 3 is the structural representation of source Access Network in the embodiment of the invention;
Fig. 4, Fig. 5 carry RA Channel Gain parameter for source Access Network in the embodiment of the invention through TCA message and are issued to the process chart of user terminal;
Fig. 6 carries MAC layer sequence number, for example high order bit, data source control channel parameter and data source control channel gain parameter one of them or combination in any for source Access Network in the embodiment of the invention through TCA message and is issued to the process chart of user terminal.
Embodiment
In the present embodiment; When user terminal carries out the connected state direct-cut operation between Access Network; Send Reverse Activity degree channel gain parameters R A Channel Gain to the source Access Network by target access network, said source Access Network carries said RA Channel Gain parameter and is issued to user terminal through Traffic Channel Assignment message TCA.
The structure of a kind of communication system in the present embodiment is consulted shown in Figure 2, comprising: user terminal 200, Access Network 201; Wherein, said user terminal 200 is used for connecting with corresponding Access Network 201, to carry out data communication; Said Access Network 201 is a plurality of; Be used for said user terminal 200 is linked into network; Wherein, When said user terminal 200 carries out the connected state direct-cut operation between source Access Network and target access network, obtain RA Channel Gain parameter by said source Access Network from target access network, carry said RA Channel Gain parameter and be issued to said user terminal through Traffic Channel Assignment TCA message.
The structure of the provenance Access Network in the present embodiment is consulted shown in Figure 3, comprising: communication unit 300, processing unit 301; Said communication unit 300 is used for communicating with user terminal and other Access Network; Said processing unit 301; Definite said user terminal is used for when need switch to target access network; Carry the RA Channel Gain parameter that gets access to from said target access network through Traffic Channel Assignment TCA message, and indicate said communication unit 300 to be issued to said user terminal.
When said user terminal carried out the connected state direct-cut operation between source Access Network and target access network, said source Access Network can confirm that the user terminal needs switch to target access network according to information such as the intensity of the distance between user terminal and Access Network, pilot signal, loop delays.Said source Access Network is after definite user terminal need switch to target access network; Said source Access Network sends the A16 session through the A16 interface to target access network earlier and transmits request message; Accept the A16 session of said source Access Network when said target access network and transmit request, then return the A16 session and transmit response message to the source Access Network.Wherein, said A16 session is transmitted in the response message and is carried RA Channel Gain parameter.
Further; Said target access network can carry expansion routing update parameter (ExtendedRouteUpdate Parameter) in the session state information record cell (Proposed Session State Information Record IE) of said A16 session transmission response message, and in said expansion routing update parameter, adds said RA Channel Gain parameter.In the connected state direct-cut operation, the session state information record cell that target access network transmits response message through the A16 session sends said RA Channel Gain parameter to the source Access Network.Table 1 is an instantiation that in said expansion routing update parameter, adds said RA Channel Gain parameter:
Table 1 adds RA Channel Gain parameter in expansion routing update parameter
| Field Field | Length L ength (bits) |
| Parameter type ParameterType | 8 |
| Length L ength | 8 |
| Pilot tone is counted NumPilots | 4 |
Pilot tone in the following field is counted NumPilots occurrences of the following field:
| Reverse Activity degree channel gain RAChannelGain | 2 |
| MAC layer sequence number, for example high order bit MACIndexMSB | 1 |
| Data source control channel gain DSCChannelGain | 5 |
| NumCells is counted in the sub-district | 4 |
NumCells occurrences of the following field is counted in sub-district in the following field:
| Data source control channel DSC | 3 |
| Reserved identities Reserved | 0-7(as?needed) |
Can find out from table 1; In said expansion routing update parameter, increased the RA ChannelGain parameter of 2bit; Wherein, the number of RA Channel Gain parameter is all corresponding with pilot tone Pilot with the position, i.e. the corresponding RA Channel Gain parameter of each pilot tone.
Consult shown in Figure 4ly, the source Access Network carries RA Channel Gain parameter through TCA message and is issued to the handling process of user terminal following in the present embodiment:
Step 400, user terminal and source Access Network connect, and get into state of activation.
Step 401, said source Access Network send the A16 session to target access network and transmit request message, and request switches to target access network with user terminal.
Step 402, said target access network are accepted the A16 session transmission request that the source Access Network sends; Return the A16 session to the source Access Network and transmit response message; Wherein, said target access network transmits in the expansion routing update parameter of carrying in the session state information record cell of response message in said A16 session and adds RAChannel Gain parameter.
Step 403, source Access Network transmit response message according to the A16 session that the target access network that receives returns; Carry RA Channel Gain parameter and be issued to user terminal through TCA message, indicating user terminal is follow-up to be used for reverse power control with this RA Channel Gain parameter.
Step 404, source Access Network send the A16 session to target access network and transmit completion message, and the notification target Access Network switches to be carried out.
Step 405, user terminal switch to target access network by the source Access Network.
In another kind of implementation; Said target access network also can transmit in said A16 session and add new cell in the response message: Reverse Activity degree channel gain parameter cell RA Channel Gain ParametersIE, carry said RA Channel Gain parameter by this cell.Wherein, the gauge outfit information that comprises of said Reverse Activity degree channel gain parameter cell and field are respectively shown in table 2 and table 3; The mode of filling in that said Reverse Activity degree channel gain parameter cell transmits in the response message in the A16 session is as shown in table 4.
Table 2 increases cell gauge outfit information newly
| Cell title Element Name | Checking sign Identifier (Hex) |
| The RAChannelGain parameter | ?17H |
Table 3 increases cell field information newly
The newly-increased cell of table 4 transmits the mode of filling in the response message in the A16 session
Consult shown in Figure 5ly, the source Access Network carries RA Channel Gain parameter through TCA message and is issued to the handling process of user terminal following in the present embodiment:
Step 500, user terminal and source Access Network connect, and get into state of activation.
Step 501, said source Access Network send the A16 session to target access network and transmit request message, and request switches to target access network with user terminal.
Step 502, said target access network are accepted the A16 session transmission request that the source Access Network sends; Return the A16 session to the source Access Network and transmit response message; Wherein, Said target access network transmits in said A16 session and adds new cell in the response message, carries RA Channel Gain parameter by this cell.
Step 503, source Access Network transmit response message according to the A16 session that the target access network that receives returns; Carry RA Channel Gain parameter and be issued to user terminal through TCA message, indicating user terminal is follow-up to be used for reverse power control with this RA Channel Gain parameter.
Step 504, source Access Network send the A16 session to target access network and transmit completion message, and the notification target Access Network switches to be carried out.
Step 505, user terminal switch to target access network by the source Access Network.
In Fig. 4 and flow process shown in Figure 5; User terminal is after receiving said RA Channel Gain parameter; Further come the Reverse Activity degree bit RAB value of demodulation Reverse Activity degree channel RA Channel according to this RA Channel Gain parameter; Get access to the reverse load of current access sector through the RAB value, and then carry out reverse power control.
When in the TCA message that user terminal issues, not comprising RA Channel Gain parameter for fear of the source Access Network; Subsequent control parameter such as MAC sequence number high order bit (MAC Index MSB), data source control channel parameter DSC, data source control channel gain parameter (DSC Channel Gain Base) can not be issued to the situation of user terminal; As shown in table 6; In the another kind of implementation of the embodiment of the invention; The fill rule that MAC sequence number high order bit is comprised indication field (RAChannelGainIncluded) is revised as: if in TCA message, include MAC sequence number high order bit field; Then MAC sequence number high order bit is comprised indication field and be changed to 1, be changed to 0 otherwise MAC sequence number high order bit is comprised indication field.That is to say; In the prior art; When carrying RA Channel Gain parameter (comprising indication field RAChannelGainIncluded is 1) in the TCA message; Just issue MAC sequence number high order bit field (comprising indication field is 1), and in embodiments of the present invention, no matter whether carry RA Channel Gain parameter in the TCA message; As long as include MAC sequence number high order bit field in the TCA message, then in the TCA message that issues to user terminal, carry this MAC sequence number high order bit field; Same; When including data source control channel parameter field or data source control channel gain parameter field in the TCA message; Also in TCA message, carry, and do not determine whether carrying according to whether comprising RA Channel Gain parameter in the TCA message as necessary field.
The fill rule of parameter in the table 6TCA message
| Field Field | Length L ength (bits) |
| Message id MessageID | 8 |
| Message sequence MessageSequence | 8 |
| Channel comprises indication ChannelIncluded | 1 |
| Channel Channel | 0or?24 |
| Vertical shift FrameOffset | 4 |
| DRC length DRCLength | 2 |
| DRC channel gain DRCChannelGainBase | 6 |
| Ack channel gain A CKChannelGain | 6 |
| Pilot tone is counted NumPilots | 4 |
The pilot tone of following field is counted NumPilots occurrences of the followingrecord:
| The pilot frequency pseudo-random sign indicating number PN PilotPN that setovers | 9 |
| Soft handover SofterHandoff | 1 |
| MAC layer sequence number, for example low-order bit MACIndexLSBs | 6 |
| DRC covers DRCCover | 3 |
| RAB length RABLength | 2 |
| The RAB RABOffset that squints | 3 |
| The RA channel gain comprises indication RAChannelGainIncluded | 0or?1 |
The pilot tone of following field is counted NumPilots occurrences of the followingfield:
| MAC layer sequence number, for example high order bit comprises indication MACIndexMSBsIncluded | 0or?1 |
The pilot tone of following field is counted NumPilots occurrences of the followingfield:
| MAC layer sequence number, for example high order bit MACIndexMSB | 0or?1 |
| DSC channel gain DSCChannelGainBase | 0or?5 |
0or?N?occurrences?of?the?following?field，where?N?is?thenumber?of?SofierHandoff?fields?set?to‘0’in?this?message
| DSC | 0or?3 |
| Keep Reserved | Variable Variable |
In above-mentioned modification TCA message under the situation of parameter fill rule; In the Access Network 201 of communication system shown in Figure 2; When said user terminal 200 carries out the connected state direct-cut operation between source Access Network and target access network, carry MAC layer sequence number, for example high order bit, data source control channel parameter and data source control channel gain parameter one of them or combination in any and be issued to said user terminal 200 through TCA message by said source Access Network.Wherein, Said source Access Network carries said MAC layer sequence number, for example high order bit, data source control channel parameter and data source control channel gain parameter one of them or combination in any when in said MAC layer sequence number, for example high order bit, data source control channel parameter and the data source control channel gain parameter data content being arranged in said TCA message.
In the source Access Network shown in Figure 3; Said processing unit 301 is used for when definite said user terminal need switch to target access network; Carry MAC layer sequence number, for example high order bit, data source control channel parameter and data source control channel gain parameter one of them or combination in any through Traffic Channel Assignment TCA message, and indicate said communication unit 300 to be issued to user terminal.
Consult shown in Figure 6ly, the source Access Network carries MAC layer sequence number, for example high order bit, data source control channel parameter and data source control channel gain parameter one of them or combination in any through TCA message and is issued to the handling process of user terminal following in the present embodiment:
Step 600, user terminal and source Access Network connect, and get into state of activation.
Step 601, said source Access Network send the A16 session to target access network and transmit request message, and request switches to target access network with user terminal.
Step 602, said target access network are accepted the A16 session transmission request that the source Access Network sends; Return the A16 session to the source Access Network and transmit response message; Wherein, said target access network transmits in said A16 session and carries MAC layer sequence number, for example high order bit, data source control channel parameter and data source control channel gain parameter one of them or combination in any in the response message.
When in step 603, MAC layer sequence number, for example high order bit, data source control channel parameter and the data source control channel gain parameter of source Access Network in the A16 session transmission response message that the target access network of confirming to receive returns data content being arranged; Carry said MAC layer sequence number, for example high order bit, data source control channel parameter and data source control channel gain parameter one of them or combination in any and be issued to user terminal through TCA message; Indicating user terminal subsequent demodulation forward direction MAC bag; And control data transmission is not interrupted when the DOA virtual soft; And, the transmitting power of control user terminal on DSC Channel channel.
Step 604, source Access Network send the A16 session to target access network and transmit completion message, and the notification target Access Network switches to be carried out.
Step 605, user terminal switch to target access network by the source Access Network.
Can know from the embodiment of the invention; The source Access Network obtains Reverse Activity degree channel gain RA Channel Gain parameter through the A16 interface from target access network; Make and follow-uply can carry RA ChannelGain parameter and be issued to user terminal through TCA message; And then make user terminal carry out reverse power control according to RA Channel Gain parameter, guarantee the capacity and the performance of whole system; In addition; In the embodiment of the invention; The source Access Network is under the situation that does not get access to RA Channel Gain parameter; Yet can carry MAC layer sequence number, for example high order bit, data source control channel parameter and data source control channel gain parameter one of them or combination in any and be issued to user terminal, thereby make the user terminal can demodulation forward direction MAC bag, and control data transmission not be interrupted when the DOA virtual soft through TCA message; And, the transmitting power of control user terminal on the DSCChannel channel.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1. the method for a sending down control parameter when hard handing off connected state among access networks is characterized in that, comprising:
The source Access Network at user terminal place is initiated the A16 session to target access network and is transmitted request; And
Receive the A16 session transmission response message that said target access network returns to said source Access Network after receiving described request, wherein, said A16 session is transmitted response message and is carried Reverse Activity degree channel gain parameters R A Channel Gain parameter;
Carry said RA Channel Gain parameter and be issued to user terminal through Traffic Channel Assignment TCA message.
2. the method for claim 1 is characterized in that, in the expansion routing update parameter of session state information record cell of response message is transmitted in said A16 session, carries said RA Channel Gain parameter.
3. method as claimed in claim 2 is characterized in that, number and the position of the pilot tone Pilot in said RA Channel Gain parameter and the said expansion routing update parameter are corresponding.
4. the method for claim 1 is characterized in that, transmits in said A16 session and adds new cell in the response message, carries said RA Channel Gain parameter by this cell.
5. like each described method of claim 1 to 4; It is characterized in that; Said source Access Network confirm to comprise in the Traffic Channel Assignment TCA message in MAC layer sequence number, for example high order bit field, data source control channel parameter field and the data source control channel gain parameter field the part field or all during field, carry corresponding field and be issued to user terminal through said TCA message.
6. an access network is characterized in that, comprising:
Communication unit is used for communicating with user terminal and other Access Network;
Processing unit; Be used for carrying the RA Channel Gain parameter that said communication unit gets access to from target access network through Traffic Channel Assignment TCA message; And indicate said communication unit to issue said TCA message to said user terminal; Wherein, Initiate the A16 session through said a kind of access network to target access network and transmit request, said communication unit receives said target access network and after receiving described request, transmits response message to the A16 session that has said RA Channel Gain parameter that the source Access Network returns.
7. a communication system is characterized in that, comprising:
A plurality of Access Networks are used for user terminal is linked into network, wherein, when said user terminal carries out the connected state direct-cut operation between source Access Network and target access network, initiate the A16 session by said source Access Network to target access network and transmit request; And receive the A16 session that said target access network returns to said source Access Network transmit response message after receiving described request; Wherein, Said A16 session is transmitted response message and is carried RA Channel Gain parameter, and carries said RA ChannelGain parameter and be issued to said user terminal through Traffic Channel Assignment TCA message.
8. system as claimed in claim 7; It is characterized in that; Said source Access Network confirm to comprise in the Traffic Channel Assignment TCA message in MAC layer sequence number, for example high order bit field, data source control channel parameter field and the data source control channel gain parameter field the part field or all during field, carry corresponding field and be issued to user terminal through said TCA message.
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| CN2007100011665A CN101227353B (en) | 2007-01-19 | 2007-01-19 | System and method for sending down control parameter when hard handing off connected state among access networks |
| PCT/CN2008/070499 WO2008095449A1 (en) | 2007-01-19 | 2008-03-14 | Method and system for sending downwards the control parameters when the connecting state direct-cuts among the access networks |
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| CN2007100011665A CN101227353B (en) | 2007-01-19 | 2007-01-19 | System and method for sending down control parameter when hard handing off connected state among access networks |
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| CN116546577B (en) * | 2023-07-07 | 2023-09-26 | 中赣通信(集团)有限公司 | Multi-base-station intelligent scheduling method and system for communication switching |
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| US8868118B2 (en) * | 2005-04-08 | 2014-10-21 | Qualcomm Incorporated | Multiplexing on the reverse link feedbacks for multiple forward link frequencies |
| CN100455042C (en) * | 2005-07-18 | 2009-01-21 | 华为技术有限公司 | Reverse channel building method |
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| CN1375955A (en) * | 2002-04-28 | 2002-10-23 | 武汉汉网高技术有限公司 | Group data transmission method and equipment based on CDMA bandspread technology |
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| WO2008095449A1 (en) | 2008-08-14 |
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