CN101521950A - Method for binding public media access control flow and multi-carrier frequency - Google Patents

Abstract

The present invention relates to a method for binding public media access control streams and multi-carrier frequencies. Through public media access control MAC stream data frames, the carrier frequency information corresponding to the data to be sent is selectively carried, so that Node B can correctly maintain high-speed Downlink shared channel - the binding relationship between the wireless network temporary identifier H-RNTI and the carrier frequency point, and the data received from the corresponding transmission bearer of the public MAC flow is sent to the user equipment from the correct frequency point, so as to realize the common MAC flow For binding with multiple carrier frequencies, the carrier frequency information may be carrier frequency point information, or pre-agreed carrier frequency coding information. This binding method is beneficial to bandwidth sharing of Iub port transmission resources, avoids additional Iub port signaling interaction, and further saves carrier frequency information overhead by selectively carrying carrier frequency information.

Description

A binding method of public media access control flow and multi-carrier frequency

technical field

The invention relates to high-speed packet access enhanced HSPA+ technology and multi-carrier frequency time division synchronous code division multiple access TD-SCDMA system, in particular to a method for binding public MAC (media access control) flow and multi-carrier frequency.

Background technique

With the continuous development of the third-generation mobile communication, based on the high-speed shared downlink physical access HSDPA technology and the high-speed shared uplink physical access HSUPA technology, the high-speed packet access enhanced HSPA+ technology is launched, the purpose of which is to improve data transmission efficiency. , Reduce delay. In this technology, it is proposed to enhance the state of the cell_forward access channel CELL_FACH. It is hoped that the data in this state will also be carried on the high-speed downlink shared channel HS-DSCH, so that the data transmission performance of this state can be enhanced, making it A smaller transmission delay and a higher transmission rate are obtained.

According to 3GPP protocol TS25.433, for wideband code division multiple access WCDMA system, radio network controller RNC will notify NodeB (Node B) to establish public media access control MAC stream transmission bearer through physical shared channel reconfiguration message. Since the cell of the WCDMA system is a single-frequency point cell, after the NodeB receives the data from the public MAC (Media Access Control) stream transmission bearer, it can directly send it to the air interface from the single frequency point of the cell. But for the TD-SCDMA system, there can be one primary carrier and multiple secondary carriers in the cell, and users in the enhanced CELL_FACH state can reside on either the primary carrier or the secondary carriers. Therefore, after receiving the data from the public MAC stream transmission bearer, the NodeB needs to know which frequency point in the cell should be sent to the air interface. Since the user always camps on the primary carrier during initial access or cell reselection, if the NodeB receives data carrying the public high-speed downlink shared channel-radio network temporary identifier H-RNTI from the public MAC stream transmission bearer, Then it can be directly sent from the main frequency point of the cell to the air interface; however, if the NodeB receives the data carrying the dedicated H-RNTI from the public MAC stream transmission bearer, according to the current protocol and specification, the NodeB cannot know which frequency point of the cell it should transmit Send to air.

In order to solve this problem, the present invention considers from the perspective of Iub port (the interface between RNC and Node-B) transmission resource bandwidth sharing, and proposes that the public MAC stream transmission bearer can be bound with multiple carrier frequencies, and the bearer of the carried data The frequency information can be carried to the NodeB in the Iub port data frame.

Contents of the invention

The technical problem to be solved in the present invention is how to provide a method for binding public media access control flow and multi-carrier frequency, so that NodeB can correctly send from the specific frequency point of the cell and receive from the public media access control MAC flow transmission bearer The data.

The above-mentioned technical problems of the present invention are solved by providing a method for binding public media access control MAC streams and multiple carrier frequencies, through which the data frame of the public MAC stream selectively carries the carrier frequency information corresponding to the data to be sent, so that Node B It can correctly maintain the binding relationship between the high-speed downlink shared channel-wireless network temporary identifier H-RNTI and the carrier frequency point, and send the data received from the corresponding transmission bearer of the public MAC flow to the user equipment from the correct frequency point, thereby Realize the binding of common MAC flow and multiple carrier frequencies.

According to the binding method provided by the present invention, the carrier frequency information may be a carrier frequency point, which can be obtained directly by the Node B.

According to the binding method provided by the present invention, the carrier frequency information may also be a carrier frequency code, and the Node B obtains the carrier frequency point corresponding to the carrier frequency code according to the corresponding relationship agreed with the radio network controller in advance.

According to the binding method provided by the present invention, if the carrier frequency information is a carrier frequency code, it can be agreed in advance that the content of the carrier frequency code is the number of the corresponding carrier frequency point in the carrier frequency list in the resource audit response.

According to the binding method provided by the present invention, if the common H-RNTI is carried in the common MAC flow data frame, the carrier frequency information may not be carried in it, and the node B sends the data from the main frequency point to the air interface fixedly.

According to the binding method provided by the present invention, the binding method also includes Node B maintaining the binding relationship between the dedicated H-RNTI and the carrier frequency, so that the public MAC flow data frame only carries any dedicated H-RNTI for the first time Carry the carrier frequency information.

According to the binding method provided by the present invention, the common MAC flow data frame is an HS-DSCH type 2 data frame, and the carrier frequency information is located or selectively located in a specific field of the HS-DSCH type 2 data frame.

According to the binding method provided by the present invention, the binding method is applied in a multi-carrier frequency cell system.

According to the binding method provided by the present invention, the multi-carrier frequency cell system is a TD-SCDMA system.

A method for binding a common MAC flow and multiple carrier frequencies provided by the present invention can realize the binding of a common MAC flow transmission bearer and multiple carrier frequencies by carrying carrier frequency information in the HS-DSCH type 2 data frame, It is beneficial to the bandwidth sharing of Iub port transmission resources, and further, when necessary, the carrier frequency information is selected to save the overhead of the carrier frequency information to the greatest extent.

Description of drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of the HS-DSCH type 2 data frame carrying carrier frequency code in the present invention;

Fig. 2 is a schematic structural diagram of an HS-DSCH type 2 data frame carrying a carrier frequency point in the present invention;

Fig. 3 is the carrier frequency list in the audit response (AUDIT RESPONSE) message.

Detailed ways

At first, illustrate the inventive thought:

The invention proposes to improve the structure of the HS-DSCH type 2 data frame, and the carrier frequency information of the data can be carried through the extended field. The carrier frequency information may be carrier frequency point information, or pre-agreed carrier frequency coding information. In this way, in the enhanced CELL_FACH state, after NodeB receives data from the public MAC stream transmission bearer, it can know which frequency point in the cell should be sent to the air interface by analyzing the carrier frequency information, so that the common MAC stream transmission bearer and multiple The binding of multiple carrier frequencies is beneficial to the bandwidth sharing of Iub port transmission resources, and does not need to add additional Iub port standard signaling information.

The second step is to describe the carrying method of the carrier frequency information of the present invention, which specifically includes but is not limited to the following two methods:

(1) The first type:

The enhanced CELL_FACH state cell is configured with multiple carriers, and the RNC and NodeB can reach an agreement on the carrier frequency point corresponding to the carrier frequency code of the cell through the resource audit process, and encode the carrier frequency information according to the order of the carrier frequency list in the audit response. As shown in Figure 3, the carrier frequency code corresponding to the first UARFCN is 0000, the carrier frequency code corresponding to the second UARFCN is 0001, and so on. When the RNC sends the data of the user in the enhanced CELL_FACH state, it only needs to carry the carrier frequency coding information in the HS-DSCH type 2 data frame, so that the information can be simplified and the overhead of the carrier frequency information in the data frame can be saved. After NodeB receives the data from the public MAC stream transmission bearer, it finds the corresponding frequency point according to the carrier frequency coding information, and then sends the data through the air interface.

Furthermore, when the RNC sends the data of the user in the enhanced CELL_FACH state, it can selectively carry the carrier frequency coding information in the HS-DSCH type 2 data frame. For data frames of a cell with a single carrier frequency, or data frames carrying a public H-RNTI (High Speed Downlink Shared Channel-Radio Network Temporary Identifier), the carrier frequency information does not need to be carried, because the NodeB can fix the main carrier frequency from the cell to the air interface. send. For the data frame carrying the dedicated H-RNTI, the RNC can carry the carrier frequency coding information when first transmitting the data frame carrying the dedicated H-RNTI, and the NodeB maintains the binding relationship between the dedicated H-RNTI and the carrier frequency. By selectively carrying carrier frequency coding information in HS-DSCH type 2 data frames, the overhead of carrier frequency information in data frames can be further saved.

(2) The second type:

The cell in the enhanced CELL_FACH state is configured with multiple carriers, and the RNC can directly carry the frequency point information of the data in the HS-DSCH type 2 data frame. In this way, after the NodeB receives the data from the public MAC stream transmission bearer, it can directly parse out the frequency point information carried in it, and then send the data through the air interface.

Furthermore, in order to save the overhead of carrier frequency information in the data frame, when the RNC sends the data of the user in the enhanced CELL_FACH state, it can selectively carry the frequency point information of the data in the HS-DSCH type 2 data frame. For the data frame of a cell with a single carrier frequency, or the data frame carrying the public H-RNTI, the frequency point information carrying the data may not be required, because the NodeB can fixedly send from the main frequency point of the cell to the air interface. For the data frame carrying the dedicated H-RNTI, the RNC can carry the frequency point information when first transmitting the data frame carrying the dedicated H-RNTI, and the NodeB maintains the binding relationship between the dedicated H-RNTI and the carrier frequency.

Finally, taking the location update process as an example, the corresponding embodiments of the above two methods are given respectively:

(1) The first type

According to the above-mentioned first carrier frequency information carrying method, the present invention proposes to improve the HS-DSCH type 2 data frame format, and the reserved bit behind the FI (FACH Indicator, forward access channel indication) bit can be extended to MFI (Multiple Frequencies Indicator), if the MFI is 1, the last 4 bits of the first byte of the field Spare Extension carry the corresponding carrier frequency code information, the NodeB and the RNC agree on the carrier frequency point corresponding to the carrier frequency code in advance, and the carrier frequency code The value of the information is the serial number of the corresponding frequency point in the carrier frequency list of the resource audit response message. As shown in Figure 1, the improved HS-DSCH type 2 data frame format, in which the description of MFI and UARFCN code is as follows:

(1)Multiple Frequencies Indicator(MFI)

Function (Description): Indicates whether carrier code is carried in the payload;

Value range: {0=carrier frequency information is not carried in the payload, 1=carrier frequency information is carried in the payload};

Field length: 1bit.

(2) UARFCN code

Function (Description): carrier frequency coding content;

Value range: {0-11};

Field length: 4bit.

Specific steps are as follows:

1. After the RNC system is powered on, it triggers the establishment of the NCP (NodeB Control Port) link of the multi-carrier cell, and then triggers the resource audit process between the RNC and the NodeB;

2. The NodeB returns the carrier frequency list of the cell in the resource audit response message, and the RNC codes each frequency point in the carrier frequency list. The code corresponding to the first carrier frequency is 0000, and the code corresponding to the second carrier frequency is 0001. , and so on, that is to say, the code of the carrier frequency is the number of each frequency point in the carrier frequency list;

3. The RNC notifies the NodeB to establish a common MAC flow through a physical shared channel reconfiguration message.

4. The terminal UE initiates a radio resource control RRC connection request in the uplink direction, and the RNC allocates a dedicated H-RNTI for the UE in the downlink RRC connection establishment message, and orders the UE to camp on the secondary carrier, and the resource corresponding to the secondary carrier frequency is audited The second frequency point in the carrier frequency list in the response message, that is, the carrier frequency code information is 0001. Then the RNC encapsulates the RRC connection establishment message into an HS-DSCH type 2 data frame and sends it to the NodeB, where FI is 1, H-RNTI is a public H-RNTI, and carrier frequency information does not need to be carried, and WFI is 0;

5. After receiving the above-mentioned HS-DSCH type 2 data frame, the NodeB sends the data to the UE from the main frequency point of the cell.

6. After receiving the downlink RRC connection establishment message, the UE responds to the RRC connection establishment completion message in the uplink direction, and then initiates a location update request;

7. After the CN receives the UE's location update request, it sends a location update acceptance message to the RNC in the downlink direction, and the RNC encapsulates the CN's location update acceptance message in the HS-DSCH type 2 data frame format, where FI is 1 and H-RNTI For the dedicated H-RNTI allocated above, WFI is 1, and the last 4 bits of the first byte of Spare Extension are filled with 0001;

8. After NodeB receives the above HS-DSCH type 2 data frame, it establishes the HARQ entity corresponding to the dedicated H-RNTI, finds the corresponding frequency point from the carrier frequency list according to the carrier frequency coding information 0001, and links the HARQ entity to the corresponding frequency point Bind, and then send the data from the air interface;

9. The CN initiates an Iu release command to the RNC, and the RNC initiates an RRC connection release message to the UE, and encapsulates the message into an HS-DSCH type 2 data frame format and sends it to the NodeB, where FI is 1, and H-RNTI is the above-mentioned allocated dedicated H-RNTI, since the hybrid automatic repeat transmission HARQ entity corresponding to the dedicated H-RNTI has not been released at this time, therefore, the RNC does not need to carry the carrier frequency coding information, and the WFI is filled with 0;

10. After NodeB receives the above HS-DSCH type 2 data frame, it finds the corresponding HARQ entity according to the dedicated H-RNTI, and obtains the previously bound carrier frequency point, and then sends the data through the air interface;

(2) The second type

According to the above-mentioned second carrier frequency information carrying method, the present invention proposes to improve the HS-DSCH type 2 data frame format, and the reserved bits behind the FI (FACH Indicator) bit can be extended to MFI (Multiple Frequencies Indicator), if the MFI is 1, the corresponding frequency point information is carried through the first two bytes of the field SpareExtension. As shown in Figure 2, the improved HS-DSCH type 2 data frame format, where MFI and UARFCN value are described as follows:

(1)Multiple Frequencies Indicator(MFI)

Function (Description): Indicates whether the payload carries a carrier frequency point;

Value range: {0 = no frequency point is carried in the payload, 1 = frequency point is carried in the payload}; field length (Field length): 1 bit.

(2) UARFCN value

Function (Description): frequency point value;

Value range: {0-65535};

Field length: 16bit.

Specific steps are as follows:

1. The RNC notifies the NodeB to establish a common MAC flow through a physical shared channel reconfiguration message.

2. The UE initiates a radio resource control RRC connection request in the uplink direction, and the RNC allocates a dedicated H-RNTI for the UE in the downlink RRC connection establishment message, and orders the UE to camp on the secondary carrier. The RNC encapsulates the RRC connection establishment message into an HS-DSCH type 2 data frame and sends it to the NodeB, where FI is 1, and H-RNTI is a public H-RNTI, so there is no need to carry carrier frequency information, and WFI is 0;

3. After receiving the above-mentioned HS-DSCH type 2 data frame, the NodeB sends the data to the UE from the main frequency point of the cell.

4. After receiving the downlink RRC connection establishment message, the UE responds to the RRC connection establishment completion message in the uplink direction, and then initiates a location update request;

5. After the CN receives the UE's location update request, it sends a location update acceptance message to the RNC in the downlink direction, and the RNC encapsulates the CN's location update acceptance message in the HS-DSCH type 2 data frame format, where FI is 1 and H-RNTI For the dedicated H-RNTI allocated above, WFI is 1, and the first two bytes of Spare Extension fill in the auxiliary carrier frequency that the UE will camp on;

6. After NodeB receives the above-mentioned HS-DSCH type 2 data frame, it establishes the HARQ entity corresponding to the dedicated H-RNTI, binds the HARQ entity with the frequency point specified by the RNC, and then sends the data through the air interface;

7. The CN initiates an Iu release command to the RNC, and the RNC initiates an RRC connection release message to the UE, and encapsulates the message into an HS-DSCH type 2 data frame format and sends it to the NodeB, where FI is 1, and H-RNTI is the above-mentioned allocated dedicated H-RNTI, because the HARQ entity corresponding to the dedicated H-RNTI has not been released at this time, therefore, the RNC does not need to carry the frequency point information, and the WFI is filled with 0;

8. After NodeB receives the above-mentioned HS-DSCH type 2 data frame, it finds the corresponding HARQ entity according to the dedicated H-RNTI, obtains the previously bound carrier frequency point, and then sends the data through the air interface.

Claims (9)

1, a kind of public media access control flow and overloading binding method frequently, it is characterized in that, carry the carrier frequency information of data correspondence to be sent selectively by public medium access control MAC flow data frame, wherein carrier frequency information is the carrier frequency frequency point information or the carrier frequency coded message of agreement in advance.

According to the described binding method of claim 1, it is characterized in that 2, described prior agreement comprises that Node B and radio network controller reach an agreement to the corresponding carrier frequency frequency of carrier frequency coding in advance.

3, according to the described binding method of claim 2, it is characterized in that described Node B is reached an agreement to the corresponding carrier frequency frequency of carrier frequency coding in advance with radio network controller and comprised that Node B and radio network controller agreement carrier frequency are encoded to the numbering in the carrier frequency tabulation of corresponding carrier frequency frequency in resource audit response.

4, according to the described binding method of claim 1, it is characterized in that, this binding method comprises that also public medium access control MAC flow data frame does not carry described carrier frequency information when carrying public high speed descending sharing channel-Radio Network Temporary Identifier H-RNTI, Node B fixing from main carrier frequency toward eating dishes without rice or wine to send data.

5, according to the described binding method of claim 1, it is characterized in that, this binding method comprises that also Node B safeguards the binding relationship between specialized high-speed DSCH Downlink Shared Channel-Radio Network Temporary Identifier H-RNTI and the carrier frequency voluntarily, thereby public medium access control MAC flow data frame only carries described carrier frequency information when carrying arbitrary dedicated H-RNTI first.

6, according to each described binding method of claim 1-5, it is characterized in that, described public medium access control MAC flow data frame is high speed downlink shared channel HS-DSCH type 2 Frames, and described carrier frequency information is arranged in the concrete field of HS-DSCH type 2 Frames.

7, according to each described binding method of claim 1-5, it is characterized in that this binding method is applied in the multi-carrier frequency cell system.

According to the described binding method of claim 7, it is characterized in that 8, described multi-carrier frequency cell system is the TD-SCDMA system.

9, according to the described binding method of claim 4, it is characterized in that, described public medium access control MAC flow data frame is high speed downlink shared channel HS-DSCH type 2 Frames, and described carrier frequency information is arranged in the concrete field of HS-DSCH type 2 Frames selectively.

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