CN100461935C - Uplink Enhanced Control Channel Signaling Coding Method - Google Patents

Abstract

The invention discloses a method for encoding uplink enhanced control channel signaling, which is applied in the transmission process of uplink enhanced control channel E-DPCCH signaling. The method includes: using two bits in an E-DPCCH frame to indicate the type of the frame; During the E-DPCCH signaling transmission process, the E-DPCCH frame containing the frame type information is encoded, and then sent on the E-DPCCH channel. This method solves the problem of inconsistency of E-DPCCH coding content in different scenarios, and achieves full utilization of air interface resources.

Description

The method of up-enhancing control channel signalling coding

Technical field

The present invention relates to the signaling transmission technology of the up-enhancing control channel (E-DPCCH) in the CDMA mobile telecommunication, be meant especially a kind of in Wideband Code Division Multiple Access (WCDMA) (WCDMA) system the method for E-DPCCH signalling coding.

Background technology

Along with the development of mobile communication and the growth of mobile phone user's number, the first generation and the second generation mobile communication system of depending merely on prior art, existing system and existing frequency range can not adapt to the development of mobile communication and the demand of mobile phone user's growth rate.In addition, only Tong Hua the communication technology can not satisfy the needs of people to information interchange, people wish to obtain the multimedia service information such as data, video and image except that voice whenever and wherever possible, these all require to seek the higher technology of the availability of frequency spectrum, seek the bigger mobile communication system of message capacity, 3-G (Generation Three mobile communication system) produces therefrom.

WCDMA is as one of 3G standard of the three kinds of main flows in the world, among himself system is in and constantly improves.In the Release5 version, WCDMA has introduced high speed downlink packet access technology (HSDPA), and becomes a most important characteristic of Release5 version.The HSDPA technology make the descending handling capacity of WCDMA reached before 2～3 times of version, can carry various Packet Services effectively.

Corresponding with it, high-speed uplink packet access technique (HSUPA) is among the ardent standard discussion, and probably is introduced in the Release6 version of WCDMA.The core objective of HSUPA technology is by using some up technique for enhancing, improving the throughput of ascending packet data.

The HSUPA technology mainly contains following feature: 1, base station (NodeB) scheduling; Before adopting the HSUPA technology, WCDMA network side uplink scheduling function realizes at RNC, among the HSUPA scheduling feature is transferred to NodeB, the benefit of bringing is that NodeB is when dispatching, can use the load information of sub-district more accurate and in real time, utilize the ascending idle port resource more fully, thereby make cell throughout bigger.2, mix re-transmission (HARQ) automatically; Before adopting the HSUPA technology, the re-transmission of upstream data need be carried out at Radio Link control (RLC) layer of radio network controller (RNC), among the HSUPA functions of retransmission is transferred to NodeB, has shortened retransmitting the required time.Simultaneously, the incremental redundancy decoding technique that uses among the HARQ makes NodeB in decoding, can make full use of the energy of each transmission data, thereby improve the performance of eating dishes without rice or wine.3, support the short frame of 2ms Transmission Time Interval (TTI); Before adopting the HSUPA technology, up TTI shortest length is 10ms, has introduced the short frame of 2msTTI among the HSUPA, has reduced professional time-delay, has improved the capacity of system simultaneously.

In order to support above technology, on the up-downgoing physical channel, need to carry new control information, specifically, ascending control information needs to increase NodeB schedule information and HARQ information at least, and the up enhancing control of these informational needs physical channel carries.Downlink Control Information needs to increase grant information and ACK information at least.

The application scenarios of up enhancing control physical channel has two kinds.First kind:, initiate speed (RR, RateRequest) request, the data volume of the required transmission of informing base station and admissible rate, the mandate of request base station to the base station by up enhancing control physical channel in that up enhancing channel is meaningful will send the time.Second kind: when using E-DPDCH channel transport service, follow the E-DPDCH channel to transmit some layer one signalings.

In the present standard formulation, to second kind of scene more clear definition be: the information bit number is controlled at 10bit, need to transmit the E-TFCI information of 6bit, need to transmit the TSN information of 2bit.How remaining 2bit information specifically distributes not clear and definite as yet at present.In addition, the applicable cases of first kind of scene is not clearly got off yet.

At present, the coded system for the E-DPCCH signaling also has multiple mode.

A kind of is signaling information and the rate request information combined coding that will follow E-DPDCH to transmit, is mapped on the physical channel.This mode is owing to need to transmit signaling information and the rate request information of following E-DPDCH to transmit simultaneously, it is many to participate in the information encoded bit, can only select 128 spreading factor, relative 256 spreading factor, lost spreading gain, and need information transmitted under the in fact different application scenarioss is different, and this has just caused the waste of power under some scene.

Another kind of mode is: send power information in the RR information by the E-DPCCH cycle, transmit data amount information in the RR information by the MAC-e signaling simultaneously.Thisly transmit data amount information, can bring bigger time-delay, service quality is affected by the MAC-e signaling.Simultaneously, the cycle power information also can be brought the trade-off problem between signaling traffic and the performance.If the cycle is bigger than normal, the power information of base station acquisition is just reliable inadequately so.If the cycle is less than normal, the signaling traffic that needs so to transmit will increase, and brings the waste of interface-free resources.

In sum, prior art can not provide a kind of and not only guarantee that the signaling transmission was reliable in time, but also can save the E-DPCCH signalling coding mode of interface-free resources.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of in the WCDMA system method of E-DPCCH signalling coding, this method can guarantee that the signaling transmission is in time reliable, can save interface-free resources again.

In order to achieve the above object, the invention provides a kind of in the WCDMA system method of E-DPCCH signalling coding, be applied in the up enhancing channel E-DPCCH signaling transmission course, this method is achieved in that

Utilize preceding two bits in the E-DPCCH frame to represent the type of this frame, the type of described frame can comprise: rate request type and follow the normal type of the control information of E-DPDCH;

In E-DPCCH signaling transmission course, the E-DPCCH frame that will contain frame type information is encoded, and sends in the E-DPCCH channel then.

The normal type of the control information of the described E-DPDCH of following is for comprising: next Transmission Time Interval TTI does not have data, terminal UE request rising to authorize or UE request decline mandate in the E-DPCCH channel.

The frame of the E-DPCCH of described rate request type comprises the power information and (8-N) the buffer data size information of bit of frame type, the N bit of 2 bits, and wherein, N is the natural number less than 8.

The frame of the E-DPCCH of described normal type comprises frame type, the transmission sequence number TSN of 2 bits, the enhancing Channel Transmission form joint instructions E-TFCI of 6 bits of 2 bits.

The step that the described E-DPCCH frame that will contain frame type information is encoded can for:

Adopt the second order Reed-Muller encoder of input 10 bits, coding output 30 bits to realize block encoding described E-DPCCH frame, obtain 30 bits;

Utilize the frequency multiplier of SF=256 to carry out spread spectrum again, obtain 3 time slots, i.e. 2ms.

The present invention clearly defines by the encoded content to E-DPCCH, utilize bit in the E-DPCCH frame to represent the type of this frame, thereby solved the inconsistent problem of E-DPCCH encoded content under different scenes, and reached making full use of interface-free resources.Use this E-DPCCH encoding scheme, follow the signaling of E-DPDCH and rate request signaling can both be carried on the E-DPCCH, transmit with the form of layer one signaling, with respect to the MAC-e signaling, layer one signaling has simpler and advantage efficiently.In addition, the channel coding method of the ripe RM (30,10) that uses when having made full use of interface-free resources, has also further prevented to introduce the complexity that new channel coding method may bring among the shared R99 of this signaling of two types.

Description of drawings

Fig. 1 is for realizing the embodiment one cataloged procedure schematic diagram of the inventive method;

Fig. 2 is for realizing the embodiment two cataloged procedure schematic diagrames of the inventive method.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

Because the application scenarios of up enhancing control physical channel has two kinds.First kind is: in that up enhancing channel is meaningful will send the time, initiate the RR request by up enhancing control physical channel to the base station, the data volume of the required transmission of informing base station and admissible rate, the mandate of request base station.Second kind is: when using E-DPDCH channel transport service, follow the E-DPDCH channel to transmit some layer one signalings.

Therefore, the present invention is according to the difference of application scenarios, the E-DPCCH channel is divided into two types, i.e. rate request type (RR type) and follow the normal type (normaltype) of the control information of E-DPDCH, and distinguish two types by two information bits among the E-DPCCH.

Further, normal type can not have in three kinds of the data parameters, expression UE request rising authorization parameter, expression UE request decline authorization parameter any one for being illustrated in next TTI in the E-DPCCH channel.

Below being specific embodiments of the invention, in the present embodiment, is to distinguish two types of the present invention by preceding two information bits among the E-DPCCH.

Ginseng is shown in Table 1, and in the present embodiment, the E-DPCCH frame type can utilize preceding two information bits of this frame to represent, such as, represent that with " 00 " this frame is a normal type, and next TTI there are not data in the E-DPCCH channel; Represent that with " 01 " this frame is a normal type, and UE request rising is authorized; With " 10 " expression normal type, and UE request decline is authorized; With " 11 " expression " rate request type ".

Preceding two bits	Implication
		00	Normal type, and next TTI does not have data in the E-DPCCH channel
01	Normal type, and UE request rising is authorized
		10	Normal type, and UE request decline is authorized
11	The rate request type

Table 1

Only be a kind of form of present embodiment definition shown in the table 1, this does not influence scope of the present invention.In actual application, certainly utilize and represent different implications with above-mentioned different bit value.

As shown in Figure 1, the frame of the E-DPCCH of RR type comprises 10 bits, is respectively power (power) information and (8-N) buffering of bit (buffer) of frame type, the N bit of 2 bits.Wherein, the concrete value of N depends on the needs of NodeB scheduling, and what value it specifically gets does not influence protection scope of the present invention.

When needs send the E-DPCCH of RR type, frame shown in Figure 1 can be adopted the second order Reed-Muller encoder of input 10 bits, coding output 30 bits to realize block encoding, obtain 30 bits, and then utilize the frequency multiplier of SF=256 to carry out spread spectrum, obtain 3slots, i.e. 2ms.By the E-DPCCH channel this 2ms is sent again at last.

As shown in Figure 2, the frame of the E-DP CCH of normal type comprises 10 bits, is respectively frame type, the TSN of 2 bits, the E-TFCI of 6 bits of 2 bits.For this frame, adopt the second order Reed-Muller encoder realization block encoding of input 10 bits, coding output 30 bits to encode equally, obtain 30 bits, and then utilize the frequency multiplier of SF=256 to carry out spread spectrum, obtain 3slots, i.e. 2ms.By the E-DPCCH channel this 2ms is sent again at last.

And the position of each inclusive segment is not limited to shown in the figure among Fig. 1 and Fig. 2, and its order can adopt any combination.

In a word, the above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.

Claims (5)

1. up enhancing channel signaling Methods for Coding in the broadband CDMA system is applied to it is characterized in that this method may further comprise the steps in the up-enhancing control channel E-DPCCH signaling transmission course:

Utilize preceding two bits in the E-DPCCH frame to represent the type of this frame, the type of described frame comprises: rate request type and follow the normal type of the control information of E-DPDCH;

In E-DPCCH signaling transmission course, the E-DPCCH frame that will contain frame type information is encoded, and sends in the E-DPCCH channel then.

2. method according to claim 1, it is characterized in that the normal type of the control information of the described E-DPDCH of following is for comprising: next Transmission Time Interval TTI does not have data, terminal UE request rising to authorize or UE request decline mandate in the E-DPCCH channel.

3. method according to claim 2 is characterized in that, the frame of the E-DPCCH of described rate request type comprises the power information and (8-N) the buffer data size information of bit of frame type, the N bit of 2 bits, and wherein, N is the natural number less than 8.

4. method according to claim 1 is characterized in that, the frame of the E-DPCCH of described normal type comprises frame type, the transmission sequence number TSN of 2 bits, the enhancing Channel Transmission form joint instructions E-TFCI of 6 bits of 2 bits.

5. method according to claim 1 is characterized in that, the step that the described E-DPCCH frame that will contain frame type information is encoded is:

Adopt the second order Reed-Muller encoder of input 10 bits, coding output 30 bits to realize block encoding described E-DPCCH frame, obtain 30 bits;

Utilize the frequency multiplier of SF=256 to carry out spread spectrum again, obtain 3 time slots, i.e. 2ms.

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